Service Manual Epson EMP 50 51 EMP 70 71

Multi Media Projector

SERVICE MANUAL EMP-50/51(SVGA) EMP-70/71(XGA)

EMP-50/51(SVGA) EMP-50/51(SVGA) , 70/71(XGA) 70/71(XGA)


INTRODUCTION This Service Manual describes of the hardware information which is necessary for thesmooth field service of the MULTE MEDIA PROJECTOR EMP-50/51(SVGA)/EMP-70/71(XGA) and the trouble shooting.As the primary technologies modification will be supplied with the service bulletin, you may update this manual. HOW TO USE THE SERVICE MANUAL Since the service manual describes the topics which may be required in the field maintenance, you may utilize this for repair or diagnosis of failures. The contents are as following. Before you start the maintenance service, read every safety precautions and observe safety precautions and observe safety rules. precautions: SAFETY,MAINTENANCE,PERS SAFETY,MAINTENANCE,PERSON ON chapter chapter 1: GENERAL GENERAL (PART (PART NAME, SYSTEM SYSTEM FUNCT FUNCTION, ION, SPECIFI SPECIFICA CATION TION,, etc.. etc...) .) chapter 2: THEORY OF OPERATION (HARDWARE,INTERNAL CONNECTION, FUNCTION OF UNITS, etc...) chapter chapter 3: DISASSEM DISASSEMBLE BLE & ASSEM ASSEMBLE BLE (ASSEMBL (ASSEMBLY Y PROCE PROCESS SS FOR FOR MAIN MAIN FRAME FRAME)) chapt apter 4: 4: TROUBLE BLE SHO SHOOTING ING

VCCI RADIO FREQUENCY INTERFERENCE SELF RESTRICTION This product is the type 1 information equipment and uses radio frequency energy and fully complies with the limits for the specifications in the computer information equipment radio interference regulation (VCCI rules). If not installed and used properly manufacturer’s instructions, may cause interference to radio and television reception.

TRADEMARK EPSON is the trademark of SEIKO EPSON CORPORATION.

NOTICES 1. This document should not be reproduced reproduced in whole or in part without the written permission of SEIKO EPSON CORPORATION. 2. Any of description in this document is the subject to change without notice in future. 3. The information and specification in this document are the most up-to-date at the time of publication. However, we are unable to guarantee the accuracy of printed material after the date of publication. In case of any mistake or lack of description, please kindly notify us to correct. 4. Any influence by utilizing the document may be out of our responsibility responsibility regardless the item 3 above. 2001 SEIKO EPSON CORPORATION

SEIKO EPSON

0 -2 EMP-50/51(SVGA) EMP-50/51(SVGA) , 70/71(XGA 70/71(XGA )

Revis io n :B

EMP-50/51(SVGA) EMP-50/51(SVGA) , 70/71(XGA 70/71(XGA )

Record of Revisions History REV. A REV. B

Issued Date 2000.11.10 2001.11.22

Alternation ELP-51/71-model addition, a safe test addition

Memo Random Free area to memorize any important technical information here.

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0 - 3 EMP-50/51(SVGA) EMP-50/51(SVGA) , 70/71(XGA) 70/71(XGA)

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1. MAINTAIN THE SAFETY OF OPERATORS (1). PROTECTION PROTECTION FROM ELECTRIC SHOCK • Whenever doing any repair work on the product, be sure to turn off the power switch and remove the power cable from the electrical outlet. • Whenever inevitably turning the power on to the product opening the case or cover (repair process) be sure to take off any metallic materials such as a watch, cuffs, rings, and tie pins which may touch the metallic part of the product and dangerous of electric shock. (2). PROTECTION PROTECTION FROM ACCIDENTAL ACCIDENTAL INJURY • Be sure not to touch the lamp inner housing and its circumstances after the power is turned off, they may be heated up even after the cooling down process was completed. Also make sure not to touch the fan (inhale/exhaust/power supply unit A) and safety switch terminal during the operation of repair as turning the power on. • Make sure to protect your hands by gloves from sharp edges during assembly and disassembly. • Do not look into the light source or lens while the lights is on. Protect eyes from being damaged. (3). PROTECTION PROTECTION FROM FROM ACCIDENTS ACCIDENTS • Any operation should be done while the device placed on a flat and stable place to prevent the device or parts from being dropped. Be careful not to place tools and parts on the device or at your feet. • Whenever doing any repair work on the product, be sure to away from a place for foreigner come across in order to prevent the product from being used in incomplete condition or accidental near miss. Be sure not to leave the product during any repair work. • Be sure to use attached power cable and secure the earth line when you supply the power to the product.

2. SAFETY MAINTENANCE (1). PROTECTION PROTECTION FROM ELECTROSTA ELECTROSTATIC DISCHARGE • Whenever doing any repair work on the product, be sure to wear the wrist band and the electrostatic mat with grounding. When replacing any electric components (Boards and Optical engine), it is recommended to touch the electrostatic plastic bag of the component to the metallic part of the product once before take out the component from plastic bag. (2). LIMITA LIMITATION OF PARTS • Use only authorized or supplied parts from EPSON for the parts replacement including the lamp inner housing, and so on. • Use only the power cable and the interface cables attached with the product. (3). (3). SAFETY SAFETY TESTING TESTING • The following tests should be carried out on repair parts used in the LCP. (3-1).Test items • Insulation resistance test • Ground continuity check • Illumination check

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(3-2).Testing (3-2).Testing procedure Carry out testing in the order given below. Repair

Insu Insula lati tion on resi resist stan ance ce test test

Grou Ground nd cont contin inui uity ty chec check k

Illumination check

End

Safety inspections

(3-3).Testing (3-3).Testing methods 1).Insulation resistance test Testing apparatus: Insulation ohmmeter (Rating: 500 V/100 M Ω) Check item

Inspection method

Standard/Judgment level

k>

Insu Insula lati tion on ohm ohmme mete terr

Ins Insula ulation tion res resis ista tanc nce e should be 10 MΩ or more

Insulation ohmmeter settings Line terminal Ground terminal

Display

1. Set the range selection switch to 500 V. V. 2.Connect the black lead wire to the ground terminal. 3.Connect the red lead wire to the line terminal. 4.Connect the black lead wire (crocodile clip) to c in order to measure the insulation resistance (1) (between a and c) in the diagram below. 5.Next, insert the probe of the red lead wire into a. 6. Set the measure switch to LOCK, and then measure measure the insulation resistance after 1 minute. 7.Check that the insulation resistance after 1 minute is 10 MΩ or more. 8. Next, measure the insulation resistance resistance at (2) (between b and c) in the diagram below in the same way as for (1). 9. Check that the insulation resistance at (2) after 1 minute is 10 MΩ or more. Power supply lines Measure switch

a

Range selection switch

b

Projector AC inlet

(1) (2)

！ Caution: Because high voltages (500 V) are present, do not touch the probe during testing.

c

Exposed metal part of projector

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2).Ground continuity check Testing apparatus: Multimeter (with sensitivity down to 0.1

Ω)

Check item

Inspection method

Standard/Judgment level

Multimeter

Should be no resistance (0.5 Ω or less)

Multimeter settings

Display

1.Turn on the power switch. 2.Set the range selection switch to Ω. 3. Connect the black lead wire to the COM terminal. 4.Connect the red lead wire to the V/Ω/Hz terminal. 5.Check that the resistance at (1) in the diagram below is 0.5 Ω or less.

AC inlet ground

DC/AC, SW

Range selection switch

(1)

Projector AC inlet

Terminals

COM

V , Ω , Hz

Computer IN connector Exposed metal part of projector

3).Illumination check • Test Test conditions: Input a PC or video signal to the LCP and check the illumination for about 5 minutes. • Jud Judgm gmen ent: t: Proj Projec ecto torr sho shoul uld d ope opera rate te norm normal ally ly with with no smok smoke e or or fir fire. e.

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(4). (4). Other Others s • Visually check the distortion or dirt at the connectors of the power cable. If dirty, clean off, and if distorted, replace the cable in order to avoid firing by the flush over phenomenon. • When plug the internal connector cables or the interface cables, be sure to fully plug into the connectors until it stack to the connector edge. • Whenever doing removal of parts or repair work on the product, make su re that the work is done in a clean room, free of dust and dirt in order to keep the optical element away from dirt. • When disconnecting the operation panel’s FPC cable from the CN501 connector on the MA board, be sure to release the connector lock first. The connector lock should be unlocked by pulling up the both end of connector lock simultaneously with tweezers. Explored view of CN501 Lock

CN501

Unlock

light valve FPC

• Unlock the connector lock before disconnect the three FPC cables of the light valve and MA-IF cable. (Pull up the black area of the connector.) Lock state connector lock

Unlock state (Pulling up the black area) connector lock FPC cable

FPC cable

3. REQUIREMENT FOR THE MAINTENANCE PERSON Authorized person should have the following knowledge and skill for the maintenance of EMP50/51,EMP-70/71. • Need to sufficiently understand the operation and the descriptions of User’s manual. • Need to have the basic knowledge of electricity (safety operation, circuit diagram, electrostatic, and else...)

4. OTHERS • Any questions on the EMP-50/51,EMP-70/71 maintenance including supply of the service parts or contents of the document would like to be contacted to the below address. Any technical information about amendments is occasionally available as the service bulletin. SEIKO EPSON CORPORATION ADDRESS: 4897 SHIMAUCHI, SHIMAUCH I, MATSUMOTO-SHI, MATSUMOTO-SHI, NAGANO-KEN 390-8640 JAP JA PAN TEL: 81-263-48-5437 FAX: 81-263-48-5680 ATTN: ATTN: VD CS Group

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Chapter 1 Product general 1.1. PRODUCT GENERAL .............................. ................................... ........... 1-2 1.2. PART NAME ................................ ................................... ........................ 1-3 1.2.1. Outside View of Main Frame ................................. .......................... 1-3 1.2.2. Inside View of Main Frame............................. Frame ............................. ................................. 1-5 1.2.3. Outside View of Remote Controller ............................. .................... 1-7 1.3. SPECIFICATIONS ...................................... ...................................... ...... 1-8 1.4. INTERFACE SPECIFICATION ....................................... ...................... 1-10 1.4.1. Computer............ ................................... ...................................... .. 1-10 1.4.2. Audio-In ................................ ................................... ...................... 1-11 1.4.3. Audio Out .............. ..................... .............. ............... ............... .............. ............... ............... .............. .............. .............. ....... 1-11 1.4.4. S-Video.............................................. S-Video........ ...................................... ................................... ......... 1-11 1.4.5. Composite Composite Video•Video-Audio Video•Video-Audio Interface Interface .............. ...................... ............... .............. .......... ... 1-12 1.4.6. Mouse/Com ................................ ...................................... ............. 1-12 1.4.7. USB Mouse ................................ ...................................... ............. 1-12

Chapter 2 Theory of operation 2.1. HARDWARE ................................ ................................... ........................ 2-2 2.1.1. Electrical System Connections .................................. ...................... 2-3 2.1.2. Circuit block................................ block ................................ ...................................... ............... 2-4 2.1.3. Process Outline ................................. ................................... ........... 2-5 2.2. Optical Engine................................ Engine ................................ ................................... ...................... 2-6 2.3. POWER SUPPLY UNIT ................................... ................................... .... 2-9 2.4. BALLAST UNIT .............................. ................................... .................... 2-12 2.5. MA BOARD ............................. ...................................... ........................ 2-13 2.6. OPERATION PANEL .............................. ................................. ............. 2-16 2.7. IF BOARD ............................... .................................... .......................... 2-17 2.8. RECEPTOR SENSOR ................................ ...................................... .... 2-19 2.9. SPEAKER ...................................... ................................... .................... 2-20 2.10. TEMPERATURE TEMPERATURE CONTROL CONTROL ............. ..................... ............... .............. ............... ............... .............. ............ ..... 2-21 2.10.1. SENSOR/SWITCH ................................... ................................... 2-21 2.10.2. Lamp Cover Detection Switch ................................. .................... 2-21 2.10.3. SAFETY SWITCH .................................... ................................... 2-22 2.10.4. THERMISTO THERMISTOR R AND TEMPERATURE TEMPERATURE SENSOR OPERATION OPERATION . 2-22 2.11. FAN OPERATION................................. OPERATION ................................. ..................................... ......... 2-24 2.12. LED INDICATOR ............................. ...................................... ............. 2-26

Chapter 3 Disassembly and assembly 3.1. DISASSEMBLY AND ASSEMBLY PROCEDURES .............. ..................... .............. .......... ... 3-2 3.2. DISASSEMBLING DISASSEMBLING THE MAIN UNIT .............. ...................... ............... .............. .............. .............. ............ ..... 3-5 3.2.1. Removing the Lamp Inner Inner Housing ............................. .................... 3-6 3.2.2. Removing the Front Case Unit .............................. .......................... 3-7 3.2.3. Removing the Upper Case Unit.................... ................................... 3-8 3.2.4. Removing the Speaker ..................................... ............................... 3-9 3.2.5. Removing the Safety switch ............................. ............................. 3-10 3.2.6. Removing the LAMP Thermistor Thermistor ............. ..................... ............... .............. ............... ............... ......... 3-10 3.2.7. Removing the Lamp Fan ................................ ............................... 3-11 3.2.8. Removing the MA Board Assy ............... ...................... .............. ............... ............... .............. .......... ... 3-11 3.2.9. Removing IF Board/IF Fixing Plate ............... ...................... ............... ............... .............. .......... ... 3-13

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3.2.10. Removing the Shilde plate RE/Lampe fan duct................ ........... 3-13 3.2.11. Removing the Optical engine ............... ...................... .............. ............... ............... .............. .......... ... 3-14 3.2.12. Removing the Focus ring ............... ...................... ............... ............... .............. ............... ............... ......... 3-16 3.2.13. Removing the Projection Projection Lens .............. ...................... ............... .............. .............. .............. ......... .. 3-16 3.2.14. Removing the PBS fan/Ballast fan/Ballast duct Unit .............. ..................... ............... ............... ......... 3-17 3.2.15. Removing the Intake (L/V) fan..................................................... 3-17 3.2.16. Removing the the Ballast unit.......................................... .................. 3-18 3.2.17. Removing the Exhaust fan .................................. ........................ 3-18 3.2.18. Removing the Lamp Cover Detection Switch.............................. Switch .............................. 3-19 3.2.19. Removing the Power Supply Unit............... ................................. 3-19 3.2.20. Removing the Foot unit/Rear foot ............... ...................... ............... ................ ............... ......... .. 3-20

Chapter 4 Troubleshooting 4.1. BEFORE STARTING STARTING TROUBLESHOOTING TROUBLESHOOTING PROCEDURES PROCEDURES .............. .............. 4-2 4.1.1. Tools and Accessories Required for Troubleshooting..................... Troubleshooting ..................... 4-2 4.1.2. Field Replacement Parts ................................ ................................. 4-2 4.2. ENTRY ................................ ................................... ................................. 4-3 4.2.1. Outside view...................................... view ...................................... ................................... ........... 4-4 4.2.2. Internal cable connections............... connections.................................................. ................................... ............. 4-5 4.2.3. Power ON/OFF..................... ON/OFF.......................................................... ..................................... ...................... 4-6 4.2.4. Display/Picture quality ................................ ................................... .. 4-8 4.2.5. Audio output ...................................... ................................... ......... 4-10 4.2.6. Operation panel ................................. ................................... ......... 4-11 4.2.7. Remote controller ................................ .................................... ...... 4-12 4.2.8. Mouse/Com, USB Mouse ...................................... ........................ 4-13 4.2.9. Others..................... ...................................... ................................. 4-14

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Chapter 1 Product general



1.1. PRODUCT GENERAL EMP-50/51 EMP-70/71 MULTI MEDIA PROJECTOR designed as the new model of EPSON projector series is the portability device with SVGA (EMP-50/51)/XGA (EMP-70/71) resolution to project enhanced color images from the personal computers CRT and any one of video equipment such as video tape deck, video camcorders or digital camera. FEATURE OF EMP-50/51,EMP-70/71 • Portable light weight, compact size The new type of power unit and circuit board and the simple structure enables to minimize the body in A4 file size [220(D)x300(W)x80(H)mm] with the weight of 3.1 kg. • Bright and clear image A compact, high-luminance lamp inner housing (EMP-50/70 UHE-150W.EMP-51/71 UHE-160W) and an optical block produce images with a luminance of 1200lm (for the EMP-51)1000lm (for the EMP-50/71) or 700lm (for the EMP-70). The size of the projected image can be set within a range of 30—300 inches (projection distance 1.0—11.0 m). • High resolution full color (16770 thousands colors) EMP-50/51: 3 (R, G, and B) of TN liquid crystal panels of 480,000 pixel will supply SVGA resolution of 800 x 600 dots. EMP-70/71: 3 (R, G, and B) of TN liquid crystal panels of 786,432 pixel will supply XGA resolution of 1024 x768 dots. • Standard attachment of remote controller The projector can be controlled using a handheld remote control unit, with menus being provided for Image source switching and Image adjustment. • Connectivity with various computers The advanced data signal determination function enables EMP-50/51,EMP-70/71 to connect with various computers such as IBM-compatible PCs and laptops, Macintosh. It also determines video signal of NTSC, PAL or SECAM in composite video, S-Video format. • Advanced Image Real-time Resizer The projector also features a new customized resinging processor (Advanced Image Real-time Resizer) chip for supporting of miscellaneous video signals. No matter what type of output is used, the result is full-size video image of outstanding clarity. • Low noise Less than 42dB at operation. • Automatic Video Tracking A totally new AVTSSTM (Automatic Video Tracking and Synchronization Sensing, patent pending) provides automatic setup of image from a computer with a touch of the AUTO button for quick and easy projection of beautiful images every time. • Simple Maintenance The easy maintenance. Number of image adjustment process is not required.

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1-2 EMP-50/51(SVGA) EMP-50/51(SVGA) , 70/71(XGA 70/71(XGA )

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1.2. PART NAME 1.2.1. Outside View of Main Frame • Projector Unit Operation panel Tele Wide Speaker Operation display indicator Warning indicator

Receptor part Focus ring Projection lens Front foot Foot lever

Air Intake vent Input/Output terminals Air Intake vent

Figure1-1

• Operation panel

Power button ON/OFF of the switching power supply. Help button Explain the treatment method when the trouble is broke out in terms of the item. Keystone( +/- key.

Source button Switches input source. Computer → S-video → Composite Video → Computer. Not connecting S-Video, S-Video is not selected. At “Help menu”, it works works enter key. key.

Figure1-2

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• Input Terminals Computer/ Component Terminal Input the video signal from the computer, or the RGB video signal.

Mouse/Com Terminal Used when using the remote control as a wireless mouse.

Audio In Terminal Input the audio signal from the computer by the stereo mini jack.

USB Mouse Terminal Used when using the remote control as a wireless mouse.

S-Video Terminal Input the S-video signal of the A/V devices.

Audio Out Terminal Out put the audio signal to the external speaker. speaker.

R-Audio-L Terminals Input the audio signal from the A/V devices.

Video Terminal Input the video signal of the A/V devices.

Figure1-3

AC inlet

Air exhaust vent

Figure1-4

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1.2.2. Inside View of Main Frame

Power supply unit

MA board

Projection lens

Ballast unit

Exhaust fan

LAMP thermistor L/V thermistor

Safety switch

Lamp fan

IF board assembly

Figure1-5

Operation panel

Speaker

Figure1-6

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RC photosensor

Foot lever L

Foot lever R

Foot unit

Rear foot

Foot unit

Figure1-7 Lamp fan

Figure1-8

Lamp inner housing

Figure1-9

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1.2.3. Outside View of Remote Controller • Remote controller POWER Button This button is used to turn the projector power on and off.

Remote Control Light Part The remote control signals are output from here.

Indicator Lights during signal output from remote control. Freeze Button This button is used to momentarily pause playback of moving pictures. If you press the button once more, or if you press the ESC key, normal playback will resume.

R/C ON OFF Switch This switch is used to turn the remote control unit’s power supply on and off. E-zoom Button This button is used to activate the E-Zoom function in order to enlarge or reduce the size of the projected images. The function can be cancelled by pressing the Esc button.

A/V Mute Button This button is used to momentarily turn off the picture and s ound. If you press the button once more, or if you press the Esc button or the Volume button, normal playback will resume.

To enlarge

Effect Button This button is used to activate the assigned effect function.

To reduce Esc Button • This button is used to cancel the function which is currently being used. • If a menu or help screen is being displayed, the screen directly above the current screen will be displayed. • When projecting images from a computer, this button operates in the same way as the right button on a two-button mouse. Help Button This button is used to provide explanations of the various projector functions and operations. You can use this feature if you are not sure what to do. Video Button This button is used to switch to a picture which is being input from the video terminal. Auto Button This button is used to optimise computer images. Volume Button This button is used to adjust the volume.

Enter Button • Press this button to accept menu selections. If cascading screens are being displayed, the screen directly underneath the current screen will be displayed. • When projecting images from a computer, this button operates in the same way as the left button on a two-button mouse. • When the Enter button is pressed up or down or to the left or right, the remote control unit operates as a wireless mouse to move the pointer moves in the direction that the button was pressed. • If a menu is being displayed, the currently-selected item can then be adjusted. When the Enter button is pressed up or down or to the left or right, the bar moves in the direction that the button was pressed. Menu Button This button is used to display and clear on-screen menus.

Computer Button This button is used to switch to a picture which is being input from the computer terminal. S-Video Button This button is used to switch to a picture which is being input from the S-Video terminal.

DOWN

UP

Figure1-10

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1.3. SPECIFICATIONS SPECIFICATIONS Table 1-1 OPTICAL FEATURES Display method Optical method Projection image size Projection distance Resolution Projection Lens Focus adjustment Zooming adjustment Lamp inner housing Lamp life (Lamp inner housing)

AUDIO FEATU FEATURES RES Output for internal speaker Audio out Interface (Audio-OUT)

Video Audio L/R interface (Audio L/R)

Audio In interface (Audio In) REMOTE CONTROL Wireles less remote ote controlle ller

VIDEO INPUT/OUTPUT INPUT/OUTPUT Computer interface (PC-RGB) S-Video Interface Video interface (Composite video)

MOUSE/COM Serial Mouse or RS-232C PS ADB

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EMP-50/70 EMP-51/71 Transparency type poly-silicon TFT color ← liquid crystal display (R/G/B three panels) ← Dichroic mirror separation and prism combine method ← Minimum 30 inch to maximum 300 inch ← 1.0 m to 11.0 m EMP-50: 800 x 600 dots EMP-51: 800 x 600 dots EMP-70: 1024 x768 dots EMP-71: 1024 x768 dots F1.5 (26.3 mm) ← Manual ← ← Digital(1:1.2) UHE discharge lamp 150W UHE discharge lamp 160W Life : 1500 hours (at 50% brightness or Life : 1500 hours (at 50% when survival rate is 50%) brightness or when survival rate Average illuminance: illuminance: EMP-50:1000lm is 50%) EMP-70:700lm Average illuminance Average illuminance ratio:90% EMP-51:1200lm EMP-71:1000lm Dynamic speakers 8Ω-1W (monaural) External speaker 3.5mm Stereo mini-jack Internal speaker output is stopped when mini-jack is plugged. Output signal:0 to 500mVrms 500mVrms load imperdance:600Ω (Adjustable with volume selection) Audio signal(monaural) from the video devices. Interface type: RCA jack (white: Stereo L or monaural/Red: Stereo R) Input signal:500mVrms/47k signal:500mVrms/47kΩ Host computer Audio input (monaural) Interface type:3.5mm Stereo mini-jack Input signal: 500mVrms/47K 500mVrms/47KΩ

¨←

For contr ntrolling EMP-50/51,EM ,EMP-70/71 operating mode. Signal is detected with internal receptor board. Control range: Within 10 m and 30 degree for right and left, 15degree for up and down from receptor.

←

Host computer RGB output Interface type: HD-15pin(DDC1/2B compatible) Input signal:0.7Vp-p,75Ω. Interface type: Min-DIN 4pin Luminous:1.0Vp-p, Chrominous 0.284Vpp. Input signal: 1.0Vp-p,sync.negative 75Ω. Interface type: RCA jack (yellow) TV signal type: NTSC 3.58MHz,NTSC4.43(4.43MHz) PAL 4.43MHz,NPAL(3.58MHz), MPAL ( 3 . 5 8 M H z ) , PAL60(4.43MHz) SECAM 4.43MHz Auto identification(Default)

←

Auto identification (PS/2 Mouse or RS232C) Interface type: DIN 9pin

←


←

←

←

←

←

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Table 1-1 USB MOUSE USB Mouse POWER SUPPLY, etc. Input Voltage Power Consumption Dimensions Weight ENVIRONMENT Operat Operation ional/ al/sto storag rage e temper temperatu ature re Opera perattion ional/ al/stora torage ge hum humidit idity y Operational/storage Altitude

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USB Mouse Interface type: USB connector series B

←

AC100-120V /220-240V±10% (50/60Hz) Approx. 230 W (Standby mode:8.6W) 220 mm (D) x 300 mm (W) x 80 mm (H) Approx. 3.1 kg

←

+5C~+3 +5C~+35C 5C / -10C~ -10C~+60 +60C C (non (non conden condensin sing) g) 20% 20%~80 ~80% / 10% 10%~9 ~90 0% (non (non con condens densin ing g) 2286/9144m

←


← ← ←

← ←

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1.4. INTERFACE SPECIFICATION

Figure1-11

1.4.1. Computer/Component Video Interface Computer video input D-Sub 15 (HD)

CN100 7513S-15G2

Pin No.

Pin name Computer

Component

1

Red video signal

Cr / Pr

2

Green video signal

3

Pin No.

Pin name Computer

Component

9 (None)

(No pin)

(No pin)

Y

10

Sync GND

None

Blue video signal

Cb / Pb

11

Monitor bit ID bit 0

None

4

Monitor bit ID bit 2

None

12

SDA

None

5

GND

None

13

Horizontal sync/ composite sync

None

6

GND

GND

14

Vertical sync

None

7

GND

GND

15

SCL

None

8

GND

GND

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1.4.2. Audio-In (Computer audio input) Interface I nterface Stereo mini jack with 2 circuits for detection pin (The detection pin which is not required for audio input, is equipped for audio out terminal.) Pin No.

Signal name

5

1

GND

4

2

Computer audio input L

3

3

Computer audio input R

4

GND

8

5

GND

9

6

GND

1

7

GND

8

GND

9

GND

6

0 0 8 0 7 0 5 0 6 0 S 0 G J L

2 7

DGND

1.4.3. Audio Out (audio output) Interface Stereo mini jack with 2 circuits for detection pin Pin No.

Signal name

5

1

GND

4

2

Audio output L

3

3

Audio output R

4

NC

5

AJET

9

6

GND

1

7

GND

8

GND

9

GND

6

0 0 8 0 7 0 5 1 6 0 S 0 G J L

2 7 8

DGND

1.4.4. S-Video Interface Mini DIN 4-pin with a detection pin CN000

TSC7708-012021

4

3

2

1

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Pin No.

Signal name

1

GND

2

GND

3

Y signal input

4

C signal input

5

Input detect pin

6

GND

1-11 EMP-50/51(SVGA) EMP-50/51(SVGA) , 70/71(XGA) 70/71(XGA)

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1.4.5. Composite Video•Video-Audio Video•Video-Audio Interface RCA pin jack x 3 4 3 CVBS(Yellow) 2 0 1 0 1 9 1 7 0 4 0 L(White) J N P C J

1

Pin No 2

1 2 3 4 5 6 7 8

3 4 5 6 7

R(Red)

8

DGND

Signal name GND CVBS GND NC VAINL GND VAINL VAINR

DGND

1.4.6. Mouse/Com Interface Mini DIN 9-Pin CN900

35128A-09G2T Pin No

2

1 4

3 7

1 2 3 4 5 6 7 8 9

5 8

6 9

Signal name PCV CLK/ADB DATA TxD RxD DTR DSR IDO GND

DGND

1.4.7. USB Mouse Interface USB connector•series B CN901

UC1112C-K1 Pin No

2

1

3

4

1 2 3 4

Signal name VCC DD+ GND

DGND

SEIKO EPSON

1 -12

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Chapter 2 Theory of operation



2.1. HARDWARE HARDWARE The hardware of EMP-50/51,EMP-70/71 is distinguished in the optical system and the electrical system. Inside of the breaking line in the Figure2-1 is the optical engine(one maintenance part).

Power supply unit • AC input • Generate DC bias • Generate ballast bias

MA board

IF board

Audio-Out Audio L/R

•Initial setting of the cirduit and interface control. (Senser, Fan, Speaker, Remotecontrol etc.) •Produce R/G/B video signal

S-Video Video Mouse/Com

Ballast unit Generate lamp power

USB Mouse

Operation panel Computer

Intake fan *1 Receptor sensor

PBS fan Lamp fan Light valve R/G/B

Prism Composit R/G/B

Projection lens unit (Focus)

Exhaust fan *2

150W(EMP-50/70) 160W(EMP-51/71) Lamp inner housing

Light guide unit Divide the optical souce into three (R/G/B) with lens, filter and mirror

*1:Intake fan cools light valve R/G/B (Liquid crystal panel) *2:Exhaust fan discharges the heat of lamp inner unit mainly. *3:Please treat (Includes MA board)

area as one part on the repair.

Figure2-1

(Projection process outline) 1. Analog signal (S-Video or Video signal) signal) is provided to the MA Board through IF board. (Analog signal should be once changed into digital signal by the IF Board.) 2. The display signal (digital) is stored temporarily temporarily in the video memory of the MA board, after which it is output as the signal to drive the R/G/B light valves. 3. The light valves R/G/B are individual panels each others. They work to shut or transmit the lights from the light guide unit. 4. The lights transmitted through the light valves will be combined with the prism and projected through the projection lens unit.

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2.1.1. Electrical System Connections Electrical units are physically connected mainly to the MA Board as shown below.

Operation panel

S P

CN800 SP Exhaust fan

Power supply unit

CN1005 EX Fan

PJ080 MA board

CN1100 Power supply unit Lamp Cover Detection switch

CN501 SW Panel CN1000 L/V Fan

CN500 ON/OFF CN1800 XGA-R CN1102 SCI CN1801 SVGA-R

Ballast unit PBS

CN1601 SVGA-B

CN1001 PBS Fan

CN1600 XGA-B

fan Lamp thermistor

CN1003 L/V TH

Intake fan L/V thermistor

Lamp fan

CN1002 Lamp Fan

CN1004 Lamp TH CN1701 SVGA-G CN1700 XGA-G CN901 USB input terminal

CN300

Circuit board connector

CN100 PC input terminal CN900 COM input terminal

CN101

J000 Audio-IN terminal J001 Audio-OUT terminal CN001 CVBS VideoAudio terminal CN000 S-Video terminal

Figure2-2

Basically, EMP-50/51 and EMP-70/71 circuit are same except number of compornents, etc.

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2.1.3. Process Outline 1. The video input signal is sent from the "Computer" interface (analog RGB) or from the IF board (analog) to the MA board. (Video signals are converted to digital signals at the IF board.) 2. Display video signal (digital) is once stored in the video memory (SRAM) on the MA board then the DR board generates signals to drive the light valves R/G/B. 3. The light valves R/G/B are individual panels each others. They work to shut or transmit the lights from the light guide unit. 4. The lights transmitted through the light valves will be combined with prism and projected through the projection lens unit. 5. The audio signal is provided from IF board interface and out put to the built in speaker or external speaker (Audio Out) via a audio controller.

Circuit process block MA board RGB (analog) signal Video (analog) signal Audio signal (Computer/ Video)

Video amplifier ADC croma processor

Resizing processor (Main CPU)

Audio contoroler

LCD driver

Audio-Out Speaker

Amplifirer

Display correction

Power save controller

Display control

R G

Light valve R/G/B

B

Figure2-4

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2.2. Optical Engine The optical engine consists of 4 blocks (Lamp inner unit,Light guide unit, Light valve RGB/ Prism unit, and Projection lens unit) as shown below. These units are combined as a set into a single service unit for carrying out adjustments. Optical engine is different with EMP-50/51, EMP-70/71 and there are no compatibility.

Projection lens

Prism unit Light valve (B)

Lamp inner unit Light valve (R)

Light valve (G)

Light guide unit

Figure2-5

! Caution: • Take care not to cause any shock or mechanical stress to the optical system and also not to disassemble the light guide unit. Otherwise, the pixel divergence may occur. • The alignment adjustment for each other is applied in the factory, factory, and also electrical correction is applied with MA board according to the each optical system. Therefor do not exchange each unit to the other optical engine. • The data that was adjusted in accordance with the characteristic of L/V has been written to the MA board. Absolutely it makes the optical engine and the MA board the set and ask the repair Table 2-1 Unit function UNIT NAME Lamp inner unit Ligh Lightt gui guide de unit unit

Light Light valve valves/P s/Pris rism m unit unit

Proj Projec ecti tion on lens lens unit unit

SEIKO EPSON

FUNCTION & REMARKS Include one Discharge Lamp as a light source. Disp Disper erse se the the lig light ht from from the the lig light ht sour source ce and and uni unifo form rm by the the len lens s arr array ay A/B. A/B. (Ult (Ultra ravi viol olet et ray also eliminated.) Disperse the light in three (R/G/B) factors with condenser lens and mirror. mirror. Consis Consistt of three three ligh lightt valves valves,, polariz polarizatio ation n plate plate and and prism prism unit unit.. Each light valve controls shutter of pixels. Prism unit composes R/G/B optical signals and transfers to the projection lens unit. A foc focus us is adju adjust sted ed and and itit pro proje ject ctio ion n on on a scre screen en..


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(1).LAMP INNER UNIT This unit consists of the lamp inner housing and the ballast power supply connector. The lamp fixed on the base of the lower case is user replaceable item you can purchase it at EPSON service center. The average brightness of the lamp is reduced corresponding to its running hours. When the lamp is new, its brightness is maximum. After running about 1400 hours, the lamp reduces its brightness to almost half of a new one. The power connector is applied to receive the AC voltage from the ballast unit, so its lead wire is connected to the lamp. Power connectors

Figure2-6

1. The lamp inner unit unit The brightness of the light source lamp reduces in proportion to its running hours as mentioned above. In this device the standard lamp life is 1400 hours. If you notice the lamp brightness reduces, we recommend you to replace the lamp inner unit even before 1400 hours. The total running hour of the lamp inner unit is written in IC109 (EEPROM) on the MA Board. If the lamp is reaching or has reached the end of its life, IC502 (power save controller) outputs some signals to control the following. (1)When the cumulative running time reaches 1,400 hours (1,400 hours or more), the prob lem/warning indicator flashes red at 1-second intervals. The controller (IC502) on the MA board monitors the cumulative running time and writes the data to IC109. The lamp will only continue to operate for 100 ho urs after the problem/warning indicator starts to flash, so you should replace the lamp as soon as possible at this time. (2)When the cumulative running time reaches 1500 hours The normal operating life of the lamp inner unit is 1500 hours. Please perform "Reset Lamp Timer" with an "About Menu" after exchanging lamps.

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2. Light guide unit The light guide unit consists of three output filters (R, G and B). It filters out harmful ultraviolet radiation from the light which is output from the lamp inner unit, and also disperses the light so that even luminance is obtained. Inside the light guide unit are lenses for dispersing the light from the light source, and mirrors for separating the light into its spectral components. The diagram below shows internal views of the light guide unit

Optical Process block

Light Valve R Lamp inner housing (Light Source)

Projection Lens

Light Valve G

Light Valve B Prism (R/G/B synthesize) Ballast Unit MA Board

Figure2-7

! Caution: A light guide unit, uni t, an optical op tical head / prism unit, un it, and a projection lens unit are collectively dealt with by the name "optical engine." he figure 2-25 shows the control circuit. MA block

IC502 (PSCI)

LED indicator

IC109 EE-PROM

LPSTC/LMPON

Ballast output ON/OFF

Lamp off detection Lamp inner housing

SEIKO EPSON

Ballast unit

Power ON/OFF control Power down detection Ballast output control CN1100

Power supply unit


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2.3. POWER SUPPLY SUPPLY UNIT The Power supply unit is consist from AC inlet, filter circuit and fuse.

AC Inlet

Filter Circuit assy

Figure2-8

(1). (1). Circui Circuitt block block AC INLET AC input

Ballast unit To CP1 connection

DC output MA board CN1100(PS) To connector connection

Safety switch

Smooth output

EMI Filter

Primary power supply Smoothing/control block

Secondary power supply

Figure2-9

Fuse EMI filter filter circui circuitt

S E IK O E P S O N

: Overcurrent Overcurrent protection protection with malfanction malfanction of power supply unit or etc. It blows the fuse with overcurrent condition. : Noise Noise reducti reduction on for AC input. input.


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(2). (2). Outline Outline of function function • The power supply unit’s output cable is connected to the CN1100 (P/S) connector on the MA board, and is used to connect the following voltages and signals. • PWDS signal for the power down detection, • DC output (+2.5V/+3.3V/+5V/+9V/+14V/+19V/-7V), • Fan control signal (FANCL)...The (FANCL)...The control signal of the fan in the power supply unit. • Power on/off signal (PWON), • Trickle power (+3.3V/+5V). ! Caution: If the AC power cable is still connected after the power is shut off, +3.3V and +5V trickle background voltage are supplied to the MA board via CN1100(P/S) connector. The trickle voltage is subsequently supplied to the power on/off circuit. • The EMI filter and primary regulator circuit work to neglect noise on the AC line and generate DC voltage for the regulator. • Two of the regulator generates the various level of DC voltage as shown in the next table in the switching regulator. (The inside of () shows "EMP-51/71")The regulator detects the voltage output level at the +5V line and feed back to the switching circuit to maintain the constant output level regardless the load variation. • Each output voltage level is not adjustable. Table 2-2 Output Voltage

Accuracy Ripple

Ripple/ Spike

mV p-p

mV p-p

Output current Min

+5T

+5V

± 5%

100

200

0.03A

+3.3

+3.3V

± 5%

100

200

1.0A

+8

+8V

±

10%

200

300

0.3A

+19

+19V

±

10%

400

400

0.1A

20000 (25000)

30000 (25000)

-

Ballast

240390VDC

Typ. 0.15A (0.12A) 1.3A (0.9A) 0.6A 1.5A (0.7A) 0.5A 360V (190W)

Max

Protection circuit Peak

Over voltage

Over current

0.5A

1x10ms

+7V

4.0A

6x10ms

+4.6V

3.0A

5x20ms

+12V

I nter c e pti on I nter c e pti on -

2.0A

4x20ms

+26V

-

0.6A

10A

410V

-

Load capacity (Reference) µF 47 (100) 220 (100) 220 (100) 47x2

• The fan is built for exhausting the heat generated in the power supply unit. The heat exhausted by the fan will be exhausted outside by the exhaust fan which is connected to the CN1001 on the MA board.

SEIKO EPSON


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(3). Connector/Pin Connector/Pin assignment assignment 14

8

7

1

CN1100

Figure2-10

Power supply connector (MA board connector CN1100) pin assignment Pin No.

Voltage

Signal name

Remarks

1 2 ,3 4 ,5 6 ,7 8 9~14

+5V +3.3V +8V +19V SIGNAL GND

5.0V 3.3V 8.0V 19.0V PWON GND

trickle

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Power supply ON/OFF signal


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2.4. BALLAST UNIT It is the unit that regulates again the DC power supply (DC300-400V/0.4A) for the ballast that is supplied from the power supply unit to generates the AC power supply (AC45-120V) for the UHE lamp. Ballast output connector (connect to the lamp inner unit)

CN500 (Connect to the MA board)

CP1 (Connect to the power supply unit)

Lamp Cover Detection Switch

Figure2-11

Circuit Block CP1 (connected to Power Supply Unit) Sub power supply +15/+20V regulator circuit DC input 240~390v

HV Ballast output LV AC45~120V

Switching circuit Detection circuit

BACTA

CP501 (connected to MA Board CN1102)

Feedback

LGND LPSTC

Figure2-12

(1). (1). Proces Process s outline outline control circuit circuit voltage voltage (+15V/+20V) (+15V/+20V) for the the ballast ballast unit unit is • The sub power supply : The control generated. : Perform the switch switch actuation actuation for the regulation regulation again according according • Switching circuit to the output signal (BACTA) of the MA board unit. (The BACTA signal control the ON/OFF of the ballast output.) Modify the switching duty according to the feedback signal from the detection circuit. : The volta voltage ge for the the lamp lamp of AC45~120 AC45~120V V is genera generated. ted. • Regulator circuit : Monitoring Monitoring the regulator regulator circuit circuit and generates generates the feedback • Detection circuit signal of the output voltage in order to stabilize the voltage and detects the output current. When the lamp inner unit becomes consume (That the load current of ballast output disappears), the “LPSTC” signal is transmitted to the MA board unit.

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2.5. MA BOARD The MA Board controls the main circuit operation of the product. It consists of resizing processor (main CPU) Power I/O controller, digitizer (ADC, video amp. etc.), RAM, EEPROM, etc.The MA board controls everything except to generate the display signal and audio/video interface. The MA board is available as a unit for the service parts. The photographs below show the MA board for the EMP-50. (TOP SIDE)

Figure2-13

(BOTTOM SIDE)

Figure2-14

*MA boards are different according to the model and there are no compatibility.

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MA board circuit block IC102 R/G/B

CN100

RGB Input

IC350, 351 3ch Video Amp. 3ch ADC PLL Sync. Separator

SDA/SCL IC101 DDC(E2PROM) HSNC/VSYNC

IC101/104/103 SYNC.CORRECT

OSC 24.576MHz

IC400 Resizing Processor

Graphic port

PDA0~23

(Main CPU) GRO0~23 SCL/SDA

IC1200

RD0~7

Display port

GD0~7 BD0~7

Micro Processor Interface

P W D 0 ~ 1 5

P W A 0 ~ 1 9

Video port

Misc. Peripheral Interface (RESET)

W R • R D C O N T R O L

IC602 Flash ROM (8Mbit)

D T R / D S R / T X D / R X D

SNC.

S C L / S D A

LED0~5, KIN/OUT

P O W E R C O N T R O L L

CN352 CN353

IC502 Power Save Controller IC601 S-RAM (1Mbit)

(Power, Serial I/F, etc.)

CN300 Serial I/F signals MDB0~7 SMUTE/AJDET/etc.

Connect to CN101 on the IF Board

SCL/SDA

CN800 CPU Connector

IC505 EE-PROM

IC501 Reset

Figure2-15

SEIKO EPSON


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(2). (2). Outline Outline of function function Circuit function is almost same with EMP-50/51, EMP-70/71 MA board except video control, thus this paragraph explains EMP-50 MA board functions. • IC502(Power save controller) and related circuits are backed up with +3.3V and +5V which provided from power supply as trickle power. (If the AC cable is connected to the AC source, power po wer supply provides provid es the +3.3V +3 .3V and +5V for back-up bias even eve n if the power is turned off condition.) • When the power is turned on with power button on the th e switch panel or remote to controll er, IC502 on the MA board generate the reset signal and initialize the circuit, and the CPU reads the program from mask ROM and write it into SRAM. Then the CPU initialize the circuit functions according to the program and indicates the initial image. • Two thermistors (L/V thermistor/LAMP thermistor) detects temperature. If the temperature exceeds certain degrees, the thermistors signal generates interrupt signal to the IC502 and change the fan operation or shut off the power supply regulation. • These display data are write into the video memory (SRAM) then read out again with resizing processor. processor. • Video input (S-Video/Video In) signal are provided via IF board. These input signal are converted to digital with A/D chroma processor and stored into the SRAM. • The EEPROM and timer circuit provided the operating time control of the lamp inner unit. It’s operation is described below. • Total running hours are stored to the IC109 (EE-PROM) and increment until new lamp innerhousing detection. Table 2-3 lamp inner unit status When the operating time of the lamp inner unit exceeds 1400 hours.

Problem/warning indicator state When the power is turned on, the problem/warning indicator flashes red at 1-second intervals.

If the above phenomenon is observed, it is necessary to replace the lamp inner unit. After replacing the lamp inner unit, you must reset the lamp timer manually.

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2.6. OPERATION PANEL This panel includes the 4 switches, and is connected to the CN501 on the MA Board. (Refer to the paragraph 1.2.1 for detail function)

Power Help Keystone ±

Source

Figure2-16

SEIKO EPSON


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2.7. IF BOARD AV board includes an audio control and chroma processor circuit and a nd an interface conn ectors for audio and video signals from a host computer or external devices such as a video device. The interface connectors are shown below. • PC Audio In • Audio Out • S-Video • Video • Audio L • Audio R

(External audio input) (Audio output for external speaker) (Super impose video input: Y/C signal) (Video device image data input: CVBS signal) (Video device audio L input) (Video device audio R input)

S-Video

Audio In Audio R Audio Out

Audio L

Video

Figure2-17

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The figure2-18 shows the IF board circuit block. IF board circuit block

S Video

Video Audio L/R

CN000

Y/C

CVBS

Connect to

CN001

CN002

Audio L/R

Audio-OUT (External speaker)

J001

Audio-In

J000

(IF board)

CN300 on the MA Board. (Cable connection)

Figure2-18

The interface signal lines for “S-Video” and “Video” have chroma processor and convert the input signal to the digital then output signals to the MA Board through the connector CN002. Audio input inpu t signals from computer or from a video device (via Audio L/R) L /R) are first input to the controller and controlled the volume, tone, etc., then are output to the “Audio Out” interface or the built-in speaker via power amp. again. The audio controller performs the audio-signal output control based on the SCL/SDA (serial data/clock) signals provided from the MA Board. (ex. The sound volume control performs the audio volume control with 21 levels (mute ~ max.) based on the signals from the MA Board.)

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2.8. RECEPTOR SENSOR This is the board with the infrared signal detection component. The receptor sensor equipped in the front face. Receptor element (Infrared ray detector)

Figure2-19

The output signal (serial data) which is received by the photosensor is input to the power save controller (IC502) on the MA board. 1. The MA board turns the power on and off and controls the menu displays based on the serial data which is received from the remote control unit (from the button switches of the remote control unit). 2. The serial signal send to the AV AV board via the MA Board performs the mute, tone control and audio volume control. The figure2-20 shows remote control circuit block.

Infrared ray Remote controller

••••••

MA Board IC504

IC502 PSCI

Figure2-20

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2.9. SPEAKER Two speaker units (8 Ω-1W) are equipped inside the upper case, faced upward. The audio input signal from a host computer or AV devices connected to this can be output in Monaural through the units. If an external speaker is connected (with the help of an accessory audio cable) to the “AudioOut” terminal, the built-in speakers are disabled.

Speaker

Figure2-21

IF Board

MA Board Resizing processor(CPU)

Video-In (Audio L/R)

CN001

PC Audio

J000

IC800 Audio Controller

CN002

CN300

Driver

Selector IC502 PSCI

LINE-OUT (External speaker)

J001

Power Amp.

CN800 Internal speaker

Receptor sensor

CN501

Remote Switch controller panel

Figure2-22

The audio input from the computer or video component is amplified by the control circuits (audio controller and power amplifier) in the AV block, after which it is output from the built-in speakers which are connected to CN800. Detecting the connection to an external speaker (Audio Out), the MA Board only determines the use of the built-in speaker or the external speaker.

SEIKO EPSON


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2.10. TEMPERATURE CONTROL 2.10.1. Sensors and switches For user’s safety and safety operation of this projector (for prevention from malfunction), the following devices listed the table are installed in it. Table 2-4 Sensor/switch Name Lamp Cover Detection Switch

Location/Type Ballast unit

Safety switch

Thermal switch on the light guide unit

LAMP Thermistor

On the exhaust fan (Thermistor)

L/V thermistor

On the prism duct (Thermistor)

Function/Use Power off, in in op opening th the la lamp cover. cover. (Power on is disabled.) Overheat pr protection fo for la lamp in inner unit area. Power is shut, temperature exceeds limitation. Overheat pr protection fo for la lamp in inner unit area. The lamp will turn off if the temperature exceeds the set limit. Overheat pr protection fo for lilight bu bulb. The lamp will turn off if the temperature exceeds the set limit.

2.10.2. Lamp Cover Detection Switch This switch is installed on the side of the power supply unit and interlocks with the tab of the lamp cover. If you can turn on the projector with the lamp cover open, the (lamp inner unit) runs and generates the high heat. For replacing the lamp inner unit you open the cover. For this reason, the switch is installed to protect you from burn.

Lamp Cover Detection Switch

The Lamp Cover Detection Switch is installed on the AC input line of the power supply unit. Consequently, if the lamp cover is open, the AC power source is shut off and you can not turn on the power.

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2.10.3. SAFETY SWITCH This is the thermal switch for overheat protection installed on the light guide unit (lamp inner unit area). If overheat condition is caused by the contamination of the exhaust fan, normally the LAMP thermistor temporarily shuts off the lamp inner unit to protect it from overheat. The safety switch is installed, considering the LAMP thermistor trouble in overheat condition. Safety switch

Figure2-23

A cable with fasteners connects the safety switch and the lamp cover sensor switch. If the temperature rises above a certain level, the AC power supply is isolated and all regulating operations are stopped. (AC power is shut off and this switch runs once, you can not start up the power, before the temperature decrease to certain degrees.) In this case, you must also consider the thermistor trouble or the MA Board trouble.

2.10.4. THERMISTOR AND TEMPERATURE SENSOR OPERATION IC700 on the MA Board unit detects the temperature (resistance) with two thermistors in each 100ms. Two of thermistors are placed in the main body and mainly detect the temperature of optical block area. IC700 judge the following state according to the measurement result then change the fan operation or shut down the power.

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Temperature detection result are notified to the operation with warning indicator. Table 2-5 Temperature sensor Condition Normal temperature Warni Warning ng temper temperatu ature re Abnormal temperature

Warning indicator Off flashi flashing ng in orange orange Light in red flashing in red (2 second intervals)

Meaning Operating in the normal condition Proje Projecti ction on will will stop stop if the temper temperatu ature re increa increase se more. more. Over heat condition (stop (stop the display) Malfunction with fan, thermistor, temperature detection circuit and etc.

• Result of condition affect to the fan operations. Refer to the paragraph 2.11 for details. • Refer to the paragraph 2.12 for detail of warning indicator. (1). (1). LAMP thermi thermisto stor r LAMP thermistor is mounted with screw with the exhaust fan and detect the temperature of lamp area. To prevent the damage with over heat of lamp inner unit, Power save controller on the MA board notify the warning with temperature indicator or turns off the ballast power (lamp power) when the temperature exceed predefined level. (2). (2). L/V thermi thermisto stor r Thermistor A is mounted on the prism. When the cooling function is not enough because of dirt condition with air filter frame consumption and user exchange possibility, Power save controller on the MA board on the MA Board it output the warning indication with temperature indicator or turns off ballast power (lamp power) in order to protect the damage of light valves (LCD panel). LAMP thermistor

L/V thermistor

Exhaust fan

Figure2-24 Thermistor A/LAMP thermistor

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2.11. FAN OPERATION Four of fan are placed in side of main frame. These fan are used for over-heat protection by exhausting heated air in order to secure the circuit operation and prevent the defect. (Mainly lamp inner unit, power supply unit B and ballast unit are produce the heat) Lamp fan

Figure2-25

Exhaust fan Intake (L/V) fan

Figure2-26

PBS fan

Figure2-27

SEIKO EPSON


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(1). Control Control block diagram of of fan Synchronous serial bus PW

LVFAN

DAC

PW164

M62367

DACLD

LD

DACDI DACCLK

DI SK

AO1

DRIVER

FANON FRSLV AO2 AO8

LMPFAN DRIVER

FANON FRSLMP

EV9716C

PBSFAN

FANDET

DRIVER

FANON

FANON

FRSPBS EXFAN DRIVER

FANON FRSEX

Figure2-28

(2). (2). Out Line Line of function function • The four fans are connected by three lead wires. One of these is the signal line which sends feedback on whether the fans are detected to be running or not. • The two thermistor (L/V thermistor/LAMP thermistor) are connected to the MA board. The driver CPU controls two fan (Intake fan/Exhaust fan) according the detected temperature of the thermistor. th ermistor. • IC700 (Driver CPU) on the MA Board always observe the fan operations by monitoring feed back signals. If the feed back signal condition is different from expected, Controller judge as fan abnormal condition then turns on temperature indicator in red and turn off lamp with ballast power off. • Fan feed back signal is used for monitering the fan operation is correct or not with CPU. If the feed back signal is not expected, CPU judge as fan trouble and turn on the temperature indicator in red. • Power supply fan operate with slow or fast according to the “FANCL” signal which generate from IC502 (PSCI) on the MA board. (3). (3). Fan opera operation tion • Stand by: Turn on the fan regulator then drive the intake fan and exhaust fan with slow mode when the thermistor detect the over temperature of “Slow turn” level. Stop the intake fan and Exhaust fan then shut down the fan regulator when the thermistor detect the below temperature of “Slow turn” level. • Lamp on: Before 0.5 second, start up the intake fan and exhaust fan for lamp on. After the lamp on, both fan operation are controlled high speed or low speed according to the detection of the thermistor. • Cool down The fan continues to operate for 2 minutes after the lamp is turned off.

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2.12. LED INDICATOR Two of indicators are mounted on the MA Board unit and indicate the machine operation status. You can see these indication at slit on the upper case unit. Operation Warning indicator display indicator

Operation Warning indicator display indicator

Figure2-29flashing

Table 2-6 LED indicator Condition During warm-up During lamp on (normal) During cool down Warning (overheat) During power save Lamp malfunction Circuit malfunction, Fan malfunction, Sensor malfunction Overheat Sleep 疥 ode

Operation display indicator

Warning indicator

Green flashing *1 Green Orange flashing *1 Green Orange O FF O FF

OFF OFF OFF Orange flashing *1 OFF Red flashing *1 Red flashing *2

O FF Green flashing *2

Red OFF

*1: Flash 1: The indicator is on for 0.5 sec and off for 0.5 sec. *2: Flash 2: The indicator is on for 1 sec and off for 1 sec.

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Chapter 3 Disassembly and assembly



3.1. DISASSEMBLY AND ASSEMBLY PROCEDURES This section explains how to disassemble the EMP-50/51, EMP-70/71. The reassembly procedure is the exact reverse of the disassembly procedure. 1. Preparations Preparations (1). Remove any ring, wrist watch, cuff buttons, or other metal accessories that are likely to get in contact with the equipment. (2). (2). Wear Wear gloves. gloves. (3). Wear a wrist wrist band and ground it. Place a ground ground mat. (4). Turn Turn off the main unit and the host computer computer.. (5). Unplug the power cord cord from the main unit and service service outlet. (Even if the power is off condition, back-up bias is regulated and supplied to the circuit board when the power code is connected to the service outlet.) (6). Disconnect Disconnect the interface interface cable from the main unit. unit. (7). Clean the air filter, filter, interface and case cover cover with a vacuum cleaner. cleaner. 2. Required Required tools and accessories accessories Prepare the tools and accessories listed in the table below. Table 3-1 Name (+)Phillips screwdriver 2 Allen key Hex wrench (5mm) Tweezers Radio pliers Brush Vacuum cleaner Paper wiper Air blower Glove Wrist band, Ground map

Q.t.y 1 1 1 1 1 1 1 Some 1 1 1

Supply Market Market Market Market Market Market Market Market Market Market Market

Use Disassemble the case and interiors Disassemble Disassemble the case and interiors Removal of computer interface Unlock the FPC connector on D.R board Remove L/V thermistor Brush off the dust around fan Clean the fan and filter Clean the projection lens Clean the fan and filter. filter. Avoid finger injury Avoid electro static influence

3. Limitation Limitation of disassembly disassembly (Optical (Optical engine handling) The disassembly of the mechanical section is detailed in paragraph 3.2. The optical engine is one replaceable part. When you order the maintenance parts or request our repair service, perform works by the units listed in the table. The optical components listed in the table are required the mechanical alignment or electrical correction in the control circuit. (writing the image adjustment data) Table 3-2 1 2 3

Optical head unit Prism unit Light guide unit

These units are specified as “Optical engine”. (Treat as one replaceable part in the field maintenance.)

* Do not disassemble the Optical engine. * Do not exchange any unit on the optical engine to the others. * The optical engine and the MA board should be handle as a single set.

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3-1.Mechanical adjustments for optical engine. (1). (1). Optica Opticall Head Unit Unit The alignment (height/left and right/concurrent) of the polarization plates (include R/G/B light valves) is applied in the factory. If the alignment is modified, clear color image will not be made, because of the color divergence. ! Caution: Do not apply any mechanical stress to the polarization plate, and also not loosen the screws. (2). (2). Prism Prism Unit To synthesize the light output from each polarization plate (include R/G/B light valves), the alignment (concurrent to the polarization plate) of the prism unit is applied in our factory. If the alignment is modified, clear image will not be made, because of the pixel divergence to R/G/B synthesizing and projection lens unit, being out of focus and color uniformity. ! Caution: Do not loosen the prism unit fixing screws. (3). (3). Light Light guide guide unit The alignment of the light guide unit on the optical head unit is applied (gap and concurrent to the polarization plate) in our factory. If the alignment is modified, clear image will not be made, because of being out of the brightness uniformity on the display screen (brightness or chroma is not uniform on the screen.) In consideration of the alignment of the lens array and the mirrors, and also their combinations, the factory setting is applied to the light guide unit to support the best display performance. (If the alignment is modified or the location is changed, there comes distortion on the display screen, therefore clear image will not be made.) ! Caution: Do not disassemble the light guide unit. If you remove the upper guide cover from the unit, the alignment of lenses or mirrors may be unintentionally changed and also dust may stick to the unit. Since EMP-50/50.EMP-70/71 requires very precise adjustment, it can not be adjusted in the field. (4). Electrical Electrical corrections corrections (MA (MA Board Assy) The optical mechanism contains mechanical parts which require adjustment as described above. There are also some individual differences for the control circuit (MA board) with items such as the output driver for the display signal, and some individual differences in the optical mechanism (such as the light valves) itself. In order to obtain the optimum display, these electrical and mechanical differences need to be eliminated, rather than making mechanical adjustments, and so a variety of correction values are written into the ROM at the time of shipment from the factory. Accordingly, the optical mechanism (consisting of the optical head, light guide unit, prism unit and projection lens unit) is designed as a single set (the optical engine).

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At the factory shipment, following correction data are stored in the Flash ROM on the MA Board Assy according to the specified optical engine. Gamma adjustment data Flicker adjustment data Ghost contrast adjustment data Sub contrast adjustment data Color unevenness correction data *For the writing correction values, an expensive, special device and also skillful engineer are necessary, therefore it can not adjust in the field. 3-2.Caution for field maintenance Observe the following procedure, when you repair. Otherwise, display quality is not guaranteed, and also EPSON repair service is not available. 1. Do not disassemble disassemble the block. (Do not loosen any screws.) screws.) 2. If any of the optical engine components are defective, replace the whole optical engine as a single unit. And when you send back them to us for repair, send back them in set (by optical engine). 3. The optical engine components are treated as a single single unit, and thus the individual components which make up this unit should never be installed as single components. (For example, the prism unit must never be used by itself as a replacement for another prism unit.) 4. Precauti Precautions ons Precautions given to the individual assembly and disassembly procedures. Read them carefully before starting the assembly or disassembly procedure. A set of general precautions are given below. • As you disassemble the main unit, dust that is sticked to the internal fans and air filters is likely to migrate and contaminate the light valves R, G, and B which are the heart of the display mechanism, thus deteriorating the display quality. • Accordingly, before reassembling, check the dust inside of the main unit and, if necessary, clean them with a vacuum cleaner. • The light valves R, G, and B and circuit board assemblies are highly sensitive to static electricity. When you remove a optical engine or circuit board, place it in an antistatic bag immediately. • When you perform the assembly or disassembly operations listed below, check the pertinent unit and its surfaces for any dirt before reinstalling them. If the unit is found dirty, clean it. 1. Removing the optical engine. 2. Removing the lamp inner housing. • The speaker unit incorporates a permanent magnet. Keep it away from electromagnetic media such as floppy disks and magnetic cards. • Handle the optical engine (projection lens and light guide units) with care as they are highly susceptible to vibration and shock. • Do not try to disassemble any part (ex.power supply unit) that is not covered in this manual.

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3.2. DISASSEMBLING THE MAIN UNIT The flowchart for disassembling the main unit is shown below.You can take same disassembling procedure for EMP-50/51, 70/71. Since you can reassemble the dismantled parts in the reverse order of disassembly, unless specifically specified, this manual not contains reassembly procedure. Detailed descriptions of the disassembly procedures are given in Subsections

Do not disassemble the optical engine. Lamp inner housing (3.2.1)

Speaker (3.2.4)

Front case unit (3.2.2) Upper case unit (3.2.3) Safety switch (3.2.5) MA board assy (3.2.8)

LAMP thermistor (3.2.6) Lamp fan (3.2.7)

IF board assy (3.2.9)

IF fixing plate (3.2.9) IF board (3.2.9)

Lamp fan fixing plate (3.2.10)

Lamp fan duct (3.2.10)

Optical engine (3.2.11)

Focus ring (3.2.12) Projection lens (3.2.13)

Intake (L/V) fan duct (3.2.15)

PBS fan (3.2.14)

Intake (L/V) fan (3.2.15)

Ballast duct unit (3.2.14)

Ballast unit (3.2.16)

Exhaust fan (3.2.17)

Power supply unit (3.2.19)

Lamp Cover Detection Switch (3.2.18)

Foot unit (3.2.20)

Rear foot (3.2.20)

Lower case (3.2.20)

Figure3-1

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3.2.1. Removing the Lamp Inner Housing Warning:The lamp unit is very hot immediately after it is in use and may cause injury with heat if you handle it carelessly. Before removing the lamp unit, make su re the temperature of the lamp inner housing unit has cooled down. 1. Move the two tabs on the lamp cover in the direction of the arrow, and then remove the lamp cover. 2. Loosen two lamp inner housing housing fixing screws. screws. 3. Take out the lamp inner housing. Tab Tab

Lamp cover

Figure3-2

Screws

Lamp inner housing

Figure3-3

! Caution: • The lamp inner unit is very hot immediately after lamp is used, therefore pay attention to unit. • Take care not to touch with a hand and make dirty the lamp’s clear glass surface.

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3.2.2. Removing the Front Case Unit 1. Remove the lens cover from the projection lens. (Leave the strap attached attached to the front case unit.) 2. Remove the six screws(C.B.A SCREW3x5-4/H.F SCREW3x8-2) which are are securing the front case unit, and then remove the front case unit. (Use a 2 mm Allen key to remove the special screws at the front.) 3. Hold both sides of the front case unit and pull it forward to remove it from the projector.

Front case unit

Lens cover

Figure3-4

When installing the front case, take the following order. 1) Clean off any dust dust which is adhering to the RC receptor receptor window and the photosensor photosensor on the front case unit. 2) Secure the front front case unit with the two special special screws and the the four other screws. screws. RC photosensor

RC receptor window

Figure3-5

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3.2.3. Removing the Upper Case Unit 1. Remove six screws(C.B.A screws(C.B.A SCREW3x5-4/C.B.A SCREW 3x8-1/C.P SCREW 3x6-1).

Upper case unit

Figure3-6

2. Pull up the upper case unit about 5cm, and remove it.(Make sure two cables are connected connected to the upper case.) ZoomKey-top Cable Upper case unit

Cable

Figure3-7

! Caution: Keep in mind that it is easy to lose a zoom key-top.

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3. Unlock the CN501 connector on the MA board, and then take out the operation panel cable. 4. Pull out the speaker cable from the CN800 on the MA board assy. assy. CN800

CN501

Explored view of CN501 Lock

Speaker cable

Operation panel cable

Unlock

Figure3-8

3.2.4. Removing the Speaker 1. Remove the two screws(C.C.P-tite.SCREW.3x5) which are securing the speaker, speaker, and then remove the speaker.

Speaker

Figure3-9

! Caution: The speaker unit incorporates a permanent magnet. Keep it away from electromagnetic media such as floppy disks and magnetic cards.

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3.2.5. Removing the Safety switch 1. Disconnect two of the fast-on tab terminal cables from the safety switch. switch. 2. Remove a fixing screws(C.B.P-tite.SCREW.3x8) from the safety safety switch and detach the safety switch. Fast-on tab cables

Safety switch

Figure3-10

3.2.6. Removing the LAMP Thermistor 1. Disconnect the LAMP thermistor cable from the CN1004 on the MA board assy. assy. 2. Remove the nylon rivet (which is securing the exhaust fan), and then take out the lamp thermistor. LAMP thermistor

Nylon rivet

Exhaust fan

Figure3-11

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3.2.7. Removing the Lamp Fan 1. Disconnect the cable from the CN1005 connector on the MA board. 2. Remove the two screws(C.B.SCREW.3x15) which are securing the lamp fan, and then remove the lamp fan.

CN1005

Lamp fan

Figure3-12

Figure3-13

! Caution: When installing the lamp fan, remove the dust sticking to the fan.

3.2.8. Removing the MA Board Assy 1. Unlock the following light valve valve R/G/B cable connector.

Connector Lock

Connector Lock

Connector Lock

Figure3-14 Lock state

Unlock state (Pulling up the black area) connector lock connector lock

FPC cable

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2. Remove three light valve cables and the other cable connectors on the MA Board Assy (6 (6 connectors). 3. Remove the two screws(H.H(O).SCREW.4-40) screws(H.H(O).SCREW.4-40) which are securing the computer video input connector. (Use a 5 mm hexagonal nut.) 4. Disconnect the DC power cable from the CN1100 CN1100 connector on the MA board. 5. Remove the six screws(C.P.(O).SCREW.3x5) screws(C.P.(O).SCREW.3x5) which are securing the MA board, and then remove the MA board. (These screws are also securing the earth plate.) Screws

CN1101 CN1000 CN500 CN1102 CN1002 MA board assy

CN300 (FPC cable)

Screws

Figure3-15

Computer video input connector

CN1100 CN1100 DC power supply c able connector Screws

Figure3-16

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3.2.9. Removing the IF Board Assembly/IF Fixing Plate 1. Remove the three screws(C.P.(O).SCREW.3x5), screws(C.P.(O).SCREW.3x5), and then remove the IF board assembly. 2. Remove the four screws(C.P.(O).SCREW.3x5-2/C.B.P-tite.SCREW.3x8-2) screws(C.P.(O).SCREW.3x5-2/C.B.P-tite.SCREW.3x8-2) which are securing the IF board. 3. Separate the the IF board assembly and the IF fixing fixing plate. plate.

IF board assembly

IF fixing plate

Figure3-17

3.2.10. Removing the Shield plate RE/Lamp fan duct 1. Remove the tow screws(C.P.(O).SCREW.3x5), screws(C.P.(O).SCREW.3x5), and then remove the Shield plate RE and Conductive spring Low-Up. 2. Lamp fan duct is extracted extracted from the Shield Shield plate RE. Lamp fan dukt

Shield plate RE

Figure3-18

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3.2.11. 3.2.11. Removing the Optical engine 1. Remove the two screw(C.C.P-tite.SCREW screw(C.C.P-tite.SCREW 3x8) which are securing the ballast power supply connector, and then remove the connector. 2. Remove the four screws(C.P.SCREW.3x8) screws(C.P.SCREW.3x8) which are securing the optical engine. 3. Lift the optical optical engine straight straight up to remove it. Ballast power supply connector

Figure3-19 Screw

Screw

Screw Screw

Optical engine

Figure3-20

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! Caution: When installing the Ballast power connector, Refer to Figure3-21 Figure3-21 and confirm to set correctly. Bottom side view

Ballast power supply connctor

Inside (Side of Optical engine)

Outside (Side of Ballat unit)

Figure3-21

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3.2.12. Removing the Focus ring 1. Remove the three screws(C.P.B-tite.SCREW.2x5) screws(C.P.B-tite.SCREW.2x5) fixing the Focus ring, then remove the Focus ring.

Focus ring

Figure3-22

3.2.13. Removing the Projection Lens 1. Remove the three screws(C.P.SCREW.3x8) screws(C.P.SCREW.3x8) which are securing the projection lens unit, and then remove the projection lens from the optical engine.

Projection lens

Optical engine

Figure3-23

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3.2.14. Removing the PBS fan/Ballast duct unit 1. Remove the two screws, and then remove the PBS fan and Ballast duct unit from the optical engine. 2. Disconnect the lead wire which is attached to the optical engine with tape.

Ballast duct duct PBS fan

Tape

Figure3-24

3.2.15. Removing the Intake (L/V) fan 1. Remove the two screws(C.B.A.SCREW.3x5), and then remove the Intake (L/V) (L/V) fan duct. 2. Remove the two screws(C.P.(S-P1)SCREW.3x28), screws(C.P.(S-P1)SCREW.3x28), and then remove the Intake (L/V) fan.

Intake (L/V) fan duct

Intake (L/V) fan

Figure3-25

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3.2.16. Removing the Ballast unit 1. Disconnect the power supply unit cable cable from the CP1 connector. connector. 2. Remove the two screws(C.P.(O).SCREW.3x5) screws(C.P.(O).SCREW.3x5) which are securing the ballast unit. Ballast unit

Power supply unit

Ballast unit Power supply unit cable CP1

Figure3-26

3.2.17. Removing the Exhasut fan 1. Remove the two screws(C.C.SCREW.3x8) screws(C.C.SCREW.3x8) and then remove the exhaust fan.

Ballast unit Exhaust fan

Fan guard

Figure3-27

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3.2.18. Removing the Lamp Cover Detection Switch 1. Remove the screw(C.P.(S-P1)SCREW2.3x10), screw(C.P.(S-P1)SCREW2.3x10), and then remove the Lamp Cover Detection Switch.

Ballast umit

Lamp cover detection switch

Figure3-28

3.2.19. Removing the Power Supply Unit 1. Remove the screw(C.P.(O)SCREW.3x5), screw(C.P.(O)SCREW.3x5), and then remove the power supply unit.

Power supply unit

Figure3-29

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3.2.20. Removing the Foot unit/Rear foot f oot 1. Remove the screw(C.P.SCREW.3x18), screw(C.P.SCREW.3x18), and then remove the foot cover, foot unit from the lower case unit. 2. Press the six tabs in the direction of the arrow to remove the rear rear foot from the lower case unit.

Foot unit

Foot cover

Foot unit

Foot cover

Figure3-30

Rear foot Tab

Tab

Figure3-31

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Chapter 4 Troubleshooting



4.1. BEFORE STARTING STARTING TROUBLESHOOTING PROCEDURES 1. Whenever you replace a unit or block for maintenance purposes, double-check the replaced unit or block is defective (to determine whether the problem was due to a poor cable connection). 2. If you find any confirmations while examining the flowchart, be sure to check those items according to the troubleshooting procedure. 3. Refer to the instructions given in Chapter 3, “Disassembly and Assembly,” Assembly,” when replacing a component. 4. Before making a functional check, be sure to secure the proper connection. connection.

4.1.1. Tools and Accessories Required for Troubleshooting The tools and accessories required for troubleshooting (including fault isolation) are listed below. They need to be prepared by yourself. Table 4-1 Name Projector screen Rule (3 m) Host computer PS/2 Mouse USB Mouse Video equipment External speaker unit Multi-meter Both sides tape Tool set

Quantity 1 1 1 1 1 1 1 1 some 1 set

Use/Remarks To project images To measure the projection distance To supply test patterns (Audio and display) To test PS/2 Mouse operation. To test USB Mouse operation. To test video input (video deck, video camera, etc.) To test voice ou output (with audio cable terminals) To measure resistance and voltage (AC/DC) Fixing the component. Tools and accessories listed in Section 3.1

4.1.2. Field Replacement Parts • The parts that need be replaced during troubleshooting, such as board, cases, plates, and screws, refer to the parts list listed in an appendix of this manual. • Optical engine (consist from Light guide unit, Optical head unit, Projection lens unit and Prism unit) is the one maintenance unit. Do not separate any unit from optical engine.

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4.2. ENTRY Follow the flowchart shown below when starting the troubleshooting and proceed to the pertinent detailed flowchart (given on the next and subsequent pages).

Start

Outside view

•Visual check for outside view. (Check out the any damage on the cover area.)

Internal cable connectors

•Ensure internal cable connections on MA board. (Remove the upper case unit.)

Power ON/OFF

Display/Picture quality

Audio out

•Ensure power on/off and initialization (No signal display). (Connect power cable and turn on the power.) 1.After the power on, operation indicator will flashing and start up the screen projection. 2.Approximately 30 second later, operation indicator will light in green and screen projection is performed with maximum brightness. •Ensure screen display and picture quality. Connect necessary devices and selec t it with source button. (Computer/S-Video/Video) 1.Adjustment of screen position with foot lever R/L and projection distance. 2.Picture quality adjustment with zoom ring and focus ring. 3.Correct the screen distortion with “keystone” function. 4.Press “Auto” button and obtain the fine display quality. quality. •Ensure audio output to the internal speaker and external s peaker. •Ensure “Volume” and “A/V Mute” button action.

•Ensure button actions on the Operation panel. Operation panel

Remote control

USB Mouse/Com Interface control

•Ensure button operations on the remote controller. (R/C switch is ON first) •Ensure each button function on remote control

•Ensure USB mouse actions on USB Mouse interface. •Ensure PS/2 mouse actions on Mouse/COM interface.

•Noise, Over heat, etc. Others

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4.2.1. Outside view Turn off the power then remove power and interface cables.

Start

•Any transformation or crack are not presented. Upper case unit

Operation panel

Front case unit

Projection lens unit

•Operation panel is correctly fixed on the upper case. •Button switches should move i n smoothly.

•Any transformation or crack are not presented. •Front case is correctly fix ed between Upper case and Lower case. •Dirt condition is not presented on the receptor window . •Dirt condition is not presented on the ventilation slit. •Focus ring is adjustable.(move it in easily) •Dirt condition is not presented on the lens surface.

•Any transformation or crack are not presented. Lower case

Air filter

Lamp cover

Lamp inner housing

•Air filter frame is correctly fixed on the Upper case. •Dirt condition is not presented on the Air fil ter frame. •Dirt condition is not presented on the intake fan.(intake fan is loc ated under the Air filter frame. •Fixing screw on the Lamp cover are not loosen. •Tab •Tab on the Lamp cover is not transformed.

•Any transformation or discoloration are not presented on the Lamp inner housing frame, power cable connector and Fuse connector board. •Any damage or dirt condition is not presented on the clear glass s urface.

•Foot lever L/R can adjust the height smoothly Foot lever L/R

Interface connectors

AC inlet

Mouse/Com, USB Mouse Interface connectors

•Any transformation or discoloration are not presented on the interface connector. (Rust may cause discoloration.) •Any damage or dirt condition is not presented on the Socket •Discoloration is not presented on the connector terminal •Any damage or dirt condition is not presented on the socket

•Any transformation or discoloration are not presented on the interface connector. (Rust may cause discoloration.) •Any damage or dirt condition is not presented on the Socket

Attach the filter frame, lamp inner housing and lamp cover

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4.2.2. Internal cable connections Before taking following flow, turn off the power then disconnect power cable.

Start

Remove Upper case unit

Operation panel

Speaker

Receptor sensor

Exhaust fan

LAMP thermistor

Intake fan

Light valve R/G/B

Thermistor A

Ballast unit

Power supply unit

•CN501 on the MA board.(loch type)

•CN800 on the MA board

•RC receptor sensor(IC504)

↔

MA board

•CN1101 •CN1101 on the MA board



•CN1801/1701/1601 on the MA board (loch type)


•Ballast unit ↔Optical engine •CN1102 •CN1102 on the MA board •Lamp Cover Detection Switch ↔CN500 on the MA board •CN1100 •CN1100 on the MA board (PS)

Attach the upper case unit

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4.2.3. Power ON/OFF Start

B Yes

Press Power button on the operation panel.

Yes

Does Exhaust fan work?

Does Operation and lamp indicator change the condition 1 to 3 which are shown next page table?

No Replace Exhaust fan

Operation or lamp indicator Yes become lights or flashing?

No Does Exhaust fan work?

No

No

Press Power button on the remote controller.

Go to Display/ Picture quality.

Replace Main board.

Yes Yes

Refer to the table on next page according to the lamp indication, then replace the suspected unit.

Yes Operation or lamp indicator Yes become lights or flashing?

Make sure CN1100 on the MA board connection.

Press Power button on the operation panel. Operation or lamp indicator become lights or flashing?

Replace Power supply unit.


No

No Does fan on power supply Yes unit A work? *1

Yes No

No Replace the Power supply unit.

Operation or lamp indicator Yes become lights or flashing? No

Does the lamp inner housing secure to lower case?

B

No

Install the lamp cover and lamp inner housing again.

Yes •Disconnect power cable. •Disconnect fast-on tab on the safety switch. •Measure the safety switch resistance.

Does the safety switch resistance is almost 0 ohm?

Yes No

*1 Power supply unit fan B

No

Replace the safety switch. *2 Measure the resistance when the safety switch is not hot condition.

Yes A


Go to start

Go to next page

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Continued from previous page.

A

Operation display indicator

Condition Replace power cable.

Does AC power is output to Yes CN102 on the Power supply unit?

1

Orange

System initialization.

2

Green-flashing

Warm up operation.

3

Green

Operating.

4

Orange-flashing

Cool down operation.

5

Orange

Standby. (Cool down complete)

6

OFF

Power off condition.

7

Red or Orange-flashing

Over heat condition.

8

Red-flashing

Circuit malfunction.

9

-

Lamp timer exceed 2000 hours.

10

OFF

Lamp life is finished.

11

OFF

Lamp or Power supply problem.

No Replace Power supply unit.

Go to start

Meanings

(1). Stop at the the condition condition 1 or 8. • MA board, Optical engine, Power supply unit. (2). Stop at the condition condition 2. • MA board, Power supply unit, Lamp inner housing. (3). Stop at the condition condition 4. • Exhaust fan, LAMP thermistor, thermistor, MA board. (4). Stop at the condition condition 6.(Power 6.(Power on problem) problem) • AC input, Power supply unit, MA board, Safety switch. (5). Stop at the condition 7. (Sometimes (Sometimes occur during operation.) operation.) • Air filter (dirt condition), Exhaust fan, Power supply unit, MA board, L/V thermistor, LAMP thermi stor. (6). Stop at the the condition condition 9 or 10. • The lamp inner housing has reached the end of its service life and should be replaced. If the lamp indicator is still red after the lamp inner housing has been replaced, the cause is probably a malfunction of the MA board. (7). Stop at the the condition condition 11. 11. • Power supply unit, Ballast unit, Lamp inner housing.

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4.2.4. Display/Picture quality A

Does screen appear?

Yes

No Does light source lamp on? Yes No

Does "NO SIGNAL" message appear?

Yes Yes

No Replace Optical engine.

Replace Lamp inner housing.

Does light source lamp on? Yes

Does "NO SIGNAL" message appear?

1. Adjust the height with Foot lever. 2. Press Keystone button and eliminate the screen distortion. 3. Adjust the display screen with Focus ring.

Does fine image appear? Yes Yes No

No No

Yes

Clean projection lens.

Replace MA board.

Replace Optical engine. Does fine image appear?

Yes

No


Remove the Intake fan and clean the Light valve periphery.

No Replace Ballast unit.

Does fine image appear?


Yes

No

No

Replace MA board.

Replace Power supply unit.

Does fine image appear?


Yes

No

No

Replace Optical engine.

Replace MA board.

Go to next page.

！ Caution: Even the picture quality defectiveness that originates from condensation or dirt of lens is conceivable. In case of condensation, it becomes normal naturally if it leaves for a while.

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Continued from previous page. A

Connect host computer to the “Computer In” interface.

Does picture quality is good?

No

Go to Audio output.

Yes Does screen appear?

Yes

No Select the display source to the “computer” by pressing Source button.

Does screen appear?

Does following devices are checked? 1.Video 2.S-Video Yes No

Yes

Connect the proper device which are not checked.

No Replace IF board. A Does screen appear?

Yes

No Replace MA board.

Does screen appear? No

Yes

Press Auto button.

Does picture quality is good?

Yes

No

Replace Optical engine.

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1. Press Menu button 2. Select the “Video” menu. 3. Carry out the adjustment of brightness and contrast, etc.


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4.2.5. Audio output Start

Connect the audio cable to the Audio In interface and Host computer (Audio-out). Select the “Computer” with source button, then output the sound with computer operation.

Does internal speaker output the sound?

Does internal speaker output the sound when A/V device is connected to the “Audio-R” interface.

Yes Yes

No Yes

Does volume and tone control works?

Yes

No

No

Replace MA board.

Replace connection cable

Does internal speaker output the sound when A/V device is connected to the “Audio-L” interface.

Yes Yes

No Replace IF board.


Yes

No

No

Re-connect the CN800 on the MA board.


Does Mute button works? Yes

Replace MA board.

Connect the external speaker to the Audio out.

Yes Does external speaker output the sound?

No

Yes Yes

No

Replace Speaker.

Replace connection cable of external speaker. Does internal speaker output the sound?

Yes Does external speaker output the sound?

No Replace MA board.

Yes

No Replace IF board.

Go to Operation panel.

SEIKO EPSON


Rev is io n : B


4.2.6. Operation panel Start

Does “Power button” works?

No

Re-connect to CN501 on MA board.

Yes Yes

Does “Help button” works? No (Help description will appear on the screen.)

Does all button works? No

Yes Does Source button works? Shift the source with No following manner. (Computer →SVideo→Composit→Compu

Replace Operation panel.

Does all button works?

No

Yes Does Keystone button works? (Eliminate the screen distortion with key

Yes

No

Replace MA board.

Go to Remote controller.

S E IK O E P S O N


Revisio n :B


4.2.7. Remote controller (Preceding to the check, turn on the “R/C ON, OFF” switch on the remote controller.)

Start

Does power ON/OFF are available?

Yes

No

Does all switches are works correctly?

Yes

Does Remote controller Yes works with 10m distance? Yes

No

Replace batteries.

Exchange Remote controller.

No Replace batteries.


Yes

No


Yes Does Remote controller Yes works with 10m distance? Yes

No


Replace MA board. No


Yes

No

Yes

Replace Receptor sensor.

No

Replace Receptor sensor.



Replace optical engine.

Does Remote controller Yes works with 10m distance? Yes

Yes No

No


Replace MA board.


Yes

No

Go to Mouse/Com, USB Mouse

Replace optical engine.

SEIKO EPSON


Rev is io n : B


4.2.8. Mouse/Com, USB Mouse Start

1. Connected PS/2 Mouse cable (accessory article) to Mouse/Com interface 2. Connect PS/2 Mouse.

Replace connection cable.

Does Mouse works?

Replace IF board.

Yes

No

Does Mouse works?

Yes

No

Replace Mouse.

Replace MA board.

Does PS/2 mouse works? No Yes 1. Disconnect PS/2 Mouse and connection cable. 2. Connect USB Mouse cable. (accessory article) 3. Connect USB Mouse.

Does Mouse works?

No

Yes

Does Mouse works?

Yes

No Replace FPC cable between MA Board (CN300) and IF board (CN002).

Does USB mouse works? No

Yes

Others

S E IK O E P S O N


Revisio n :B


4.2.9. Others Start

Noise problem?

Yes Yes

Suspect following defects. •Exhaust fan, Intake fan and fan on the power supply unit. •Power supply unit (Vibration noise from pulse transformer)

Yes Yes

Suspect following defects. •L/V thermistor/LAMP thermistor or Safety switch. •Exhaust fan, Intake fan (defect or dirt condition) •Air filter (Dirt condition) •Optical engine

Yes Yes

Suspect following defects. •Defect or dirt condition on the light guide unit (Consis t from lens, mirror, etc.) •Dirt condition on the projection lens. •Defect or dirt condition on the light valv e. •MA board (Optical engine)

No

Overheat problem? No

Image display problem? No

Yes Low reproduced problem? Yes

SEIKO EPSON

Suspect following defects. Suspect •AC input (Include power line transit or distortion) •Power supply unit (Voltage fluctuation, low voltage, transit) •MA board •IF board •Cable connection (fail to make condition.) f

4 -14

EMP-50/70/51/71

Rev is io n : B

EMP-50/70/51/71

Revision History Rev

Note

Date

Issued by

Rev.A

新設

Establishment

01.03.12

Miyata

Rev.B

ELP-51/71 機種追加

Addition of EMP-51/71

01.11.22

H.Sasaki

Rev.C

パーツ構成の変更 (TI02-32 参照）

Parts Parts change changed d (ref (refer er to TI02TI02-32 32))

02.09 02.09.2 .25 5

Miyata

S E I KO E P SO N

-1

Re v i si o n: C

EMP-50/70/51/71

Exploded Diagram 8020

8003 8020

8020

2201

2204

H 8020 2205

2203

1800

8021 2202

8005 2000

8015

8005

2000

8005 1

E

J

2

8000

I J

8005 1900

H

8013

G F C D 8013 K A

8013 200 500

8013

8013 8013

8013

8007 2104 8020

8007

2101

201

8018

203

G

113

8007 8018

2400

8017

204 110

202 112

8019 D

2102

8020

8017

8019

8005

B

1302

8012 601

I

1100

1000

8005

8002

1303

2600

2500

603

8008

E

C

8009 8009

8013

F 1700 8005 8006

8011

111 11 1

K

1 2

600

800

1301 8005

8016

1500

900 8005

1600

8005 1400

B A

8012

700 8005 103 107 104

300

8020 2300

108

102

400

1200

101

205 105

109 104

8004 106

Lef.No.2204 is only ELP-51/71 105

S E I KO E P SO N

-2

8004

Re v i si o n: C

EMP-50/70/51/71


Note

Date

Issued by

Rev.A

新設

Establishment

01.03.12

Miyata

Rev.B

ELP-51/71 機種追加

Addition of EMP-51/71

01.11.22

H.Sasaki

Rev.C

パーツ構成の変更 (TI02-32 参照）

Parts ch changed (r (refer to to TI TI02-32)

02.09.25

Miyata

Rev.D

パーツ構成の訂正 (TI 02-32 Rev.B Rev.B 参照 )

Correction of part composition. (refer to TI 02-32 Rev.B) Rev.B)

02.10.31

T.Sasaki

Rev.E

Ref.NO 追加

Addition of Ref.NO

02.11.6

H.Sasaki

S E I KO E P SO N

-1

Rev is i o n :E

EMP-50/70/51/71

Exploded Diagram 2204 2205

200

8020 8020  8018

2206

8003

8020 8020 

1800

8020 8020  8005

8014

8018

2000 8005

2000

8005 1 2

E

2201

8000

I J 8020 8020 

J

8013

8018

8013 8013

H

G C

8013

8021 2202 2104

H

1900

8018

2203

K

F

D

A

8013 8013 500

8013

8005

8007

8015

8020 8018

8007 203

2101 8007

2400

G

201 204

8019 8019  8010

8018

8020

113

8018

2102

8017

8019 8019  8018

8010 2500 D

110

C

8005

202

2600

8009

8017

112 8012

8009

8013 I

601 603

8008

E

8005

8002

1303

1100 B

1302 K

1000

F

1700

8011

8005 8006

600 800 8016 111 11 1

900

1 2 1301

700 8005 8005

1500

B

1600

8005 1400 A

8012

101 8005 107 103

104

300

8020 8018 400

1200

2300

102 105 8004

108 104 205 106

Ref.No 2204,8019,8020,8021 is only EMP-51/71

S E I KO E P SO N

105

-2

109

8004

Rev is i o n :E

EMP-73/53


Note 新設

Rev.A

S E I KO E P SO N

Establishment

-1

Date

Issued by

02.10.18

Nishijima

Re v i si o n: A

EMP-73/53

Exploded Diagram 2100

2101 2104

2102

2103

8003 8003 2103

A

8004

8003

8006

8004

8006

8006 2000

1900 801

1501

802 8003 804

1500

8010

1100 501

8002 803

8002

B

H

8010

G

8002 8002

C

1600

I

K

N

O

8002 8006

H G

8002

8011

1400 8006

I

N

8002

800 8002

1300

F

8002

8005

D

8002

O

1700

B

F

J

8001

8001

A 1200

8001 1800

J

1200

400 8002

M

1701

8001

L

K 8001

C

1000

8006 601 8007 500 903 900

D 302 8008

600

901

E 304

8008

8007 8008

E 301

902

303 8008 8008

303 8004

P

300

8001

100

205 8002

M 8002 200

703

2203

8009

8001

702

8001

201

700

L 703

203

2202 8001 206 201 8001

2202 202

2201

208

8009

2400 2500

2200

8001 8001

S E I KO E P SO N

701 207

-2

Re v i si o n: A

Service Manual Epson EMP 50 51 EMP 70 71

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