Lg Pdp Training Manual 2005

Great Company Great People

Training Manual (PDP)

2005.06.27 Jinh Ji nha a Hw Hwan ang g E-Mail: [email protected]

Display Div. SCR Gr.

No image in the specific area (see the screen location2) 1. Check the related X-Board’s Power connector. 2. Check the signal cable between Controller PCB & X-Board 3. Replace X-Board

Fig Fig #1 #1 1

4

2

5

3

6

Correlation between screen & X-Board Screen Location X-Board 1) Top left 3/10

X Top-Right/ Bottom-left board

2) Center Top 2/5

X-Center Top board

3) Top right 3/10

X Top-left/Bottom right board

4) Bottom left 3/10


5) Center Bottom 2/5

X-Center Bottom board

6) Bottom right 3/10

X Top-right/Bottom left board

Fig Fig #2 #2 Examples.

2. Known Tips as to no data and partial display No image/Data COF IC. 1) Caused by X-Board’s having no power or connections

Data COF is totally or partially not displayed 2) Check the connector between COF IC & X-Board 3) Data COF IC is defective , replace the related X-Boards

Non-image Non-image white Partially displayed

No image in the specific area (see the screen location2) 1. Check the related X-Board’s Power connector. 2. Check the signal cable between Controller PCB & X-Board 3. Replace X-Board

Fig Fig #1 #1 1

4

2

5

3

6



2) Center Top 2/5

X-Center Top board

3) Top right 3/10


4) Bottom left 3/10






Fig Fig #2 #2 Examples.

2. Known Tips as to no data and partial display No image/Data COF IC. 1) Caused by X-Board’s having no power or connections

Data COF is totally or partially not displayed 2) Check the connector between COF IC & X-Board 3) Data COF IC is defective , replace the related X-Boards

Non-image Non-image white Partially displayed

Regular vertical line with one or more Data COF IC 1) Check the related X Board’s power connector. 2) Check the signal cable between Controller PCB & X-Board. 3) Replace X-Board

Fig Fig #3 #3 2

1

4

5

3

6



2) Center Top 2/5

X-Center Top board

3) Top right 3/10


4) Bottom left 3/10






1) This is caused by X Board out put IC being defective. When COF IC’s have data this means the data transfer transfer between the Controller PCB and X Board is missing 2) Check all related X Board connections. 3) Replace that X Board or CTRL PCB or both if needed.

Fig Fig #4 #4

Partial error or total error with One or more IC’s defective

Address Bar (Vertical) & Partial no-picture Fig Fig #6 #6

Fig Fig #5 #5

Bottom left 3/10 of the screen with vertical bar

Bottom left 3/10 of the screen with no-picture Fig Fig #7 #7

Related Related X-Board X-Board power power supply supply voltage voltage check check X- Left

Related Related X X Board Board Connector Connector check check Related Related X X Board Board & & Connector Connector check check Related Related X-Board X-Board replacement replacement Module Module (Panel) (Panel) check check

X Top Top - Right Right

X Top - Center -Ve VSC V setup setup -Vy

Y-SUS

VS

VSC Board

Z-SUS

Va

Controller Board Tuner Board

X- Left Left

X- Left Left

X-Right

Address Bar (Vertical) & Partial no-picture

screen

screen

screen

screen screen

screen

As the above, the space charging screen display is allocated for each X Board ( XL_TOP, XL_CNT, XL_BOT, XR_TOP, XR_CNT, XR_BOT ). Thus, if the occurring screen problems are limited only to the space X B/D, For example, regular vertical line or abnormal screen in Data COF IC unit, Data COF unit can be the problems of X B/D. The inspection method will be explained in next chapter how to inspect when screen display doesn’t work at all about each X B/D, giving examples of XL_Top B/D.

Vertical Lines 9. Verticla Data copy 1) This happens when scan wave is not reproduced property 2) Replace Y-Board

Fig Fig #8 #8

10. Grid X and Y Layout by screen size

42”

40”

X

X

Y

60”

X

50”

X

Y

X

71”

X

Y

X

X

X

Y

Bar (Horizontal) half-picture Fig Fig #9 #9 Y-Board Y-Board & & Y-Drive Y-Drive Board Board Connector Connector check check

Y-Drive Y-Drive Board Board (TOP) (TOP) Drive Drive IC IC check check

Y-Drive Y-Drive Board Board replacement replacement

Only Top image is displaying Fig Fig #10 #10 Fig Fig #10 #10

X- Left

X Top - Right

X Top - Center -Ve VSC V setup -Vy

Y-SUS

VS

VSC Board

Z-SUS

Va


X- Left

Only bottom image is displaying

X- Left

X-Right

Vertical Lines 6.One or more vertical lines in the screen

Fig Fig #11 #11

1) Irregular vertical lines is not related to controller PCB or X-Board) 2) It is mainly caused by the followings open (or short) -. Panel tsself defect -. Data COF FPC attached to panel is open or short. -. Data COF attached to panel itself is defective.

7. One or more horizontal lines in the screen

There can be several line in ¼ inch wide area It can be screen on the both side, right and left. The area is sometimes over ¼ inch wide

Fig Fig #12 #12

1) Irregular vertical line is not related to Controller PCB or Y-Board. 2) It is mainly caused by the followings open (or short) -. Y FPC Connector - reinsertion -. Open because of Y-Drive’s connector dry joint Drive Board replacement -. Panel itself is defective, Y-FPC attached to panel itself is open or short

There can be several horizontal lines.

8. Regular vertical lines in the whole screen. (mainly in one specific color, regular line is flicking) 1) This problem is related to CONTROL PCB 2) Replace CONTROL PCB

Fig Fig #12 #12

Regular vertical lines in the whole screen.

Module Control Inspection Method display type of screen The relation between color of vertical line occurring on screen and SGRAM (IC200-IC205)

※

The color of vertical line RED

IC202, 205

GREEN

IC201, 204

BLUE

IC200, 203

Vertical lines occurs at regular intervals on whole screen

. Regular vertical lines occurs at regular intervals on whole screen. (Generally, regular flickering phenomenon occurs in specific color) 1) Occurring regular vertical lines at regular intervals is the problem related to DA of Controller B/D. 2) Because DA is related to IC202, 205(Red), IC201,204(Green), IC200,203(Blue), confirm if these parts are soldered smoothly. ※

Confirm the parts related to the color of vertical lines occurring on the screen mainly and see the below as to related parts.

3) Confirm if the connection between above parts are Shorted with 3.3v or Ground. 4) Confirm if the adjacent two pins are shorted each other in connection with above parts. 5) Confirm if specific pin is not soldered in connection with above parts. 6) Confirm if the pin connected IC200-IC205 of DA is generated well and soldered smoothly. 7) Check the PCB pattern . 8) Change the Controller B/D.

Dark picture 10. Input signal pattern is displayed bud the screen is dark. 1) It happens when Z Board is not operating well 2) Check whether Z-Board’s power connector is plugged properly 3) Check whether the signal connector between Controller PCB & Z-Board i s plugged. 4) Replace Z-Board Controller PCB

11. Input signal is white pattern but other colors are displayed in spots, missing data. 1) Check the slope & waveform of Y-Board and set up, set down 2) Check the slope of Z-Board’s ramp waveform 3) Measure each Board’s output waveform by over 200MHz Oscilloscope and reference Fig12 and 13. It is possible to control Y-Board’s set up slope by adjusting VR2 and Z-Board’s ramp slope by adjusting VR1.

Fig Fig #12 #12

Fig Fig #13 #13

Y-Board measurement point : B61 (SUS_UP OUT PUT) V-setup (200V~240V)

Z-Board measurement point : B61 (SUS_UP OUT PUT)

3 2uS

20 5uS Vcc(90~110V) Vs(170~185V)

Vs(170~185V) OV

10V 140uS

23uS

170 5uS

Y Sustain voltage wave

Z-Ramp voltage wave

Panel Testing (Adjustment) Panel Testing Etching Correction (Activating Heat Run) for Defective Panel

To enter in to White Balance (Heat Run), Press Power On (1). Then,Press adjust right(2) to activate Blue, Green and Red. With the Heat Run activated on White Balance run for 6 hours And check color background by pressing adjust right(2) for Testing picture quality. Complete and repeat if needed not to exceed 24 hours.

OLD

NEW

Z-Board Operation Principles . The structure and operation of Z B/D circuit Z BOARD receives switch open and shut order signal from CONTROL BOARD and makes single SUS_OUT output wave form of high voltage. The switches used for forming wave form are 6 kinds and POWER FET for high voltage-high current is used. 6 signals connected from CONTROL BOARD ( SUS_UP, SUS_DN, E/R_UP, E/R_DN, RAMP, Z_BIAS ) adds to the gate of each FET through buffer(IC1) and FET DRIVER IC

(HCPL314J). The rest of 4 switch excluding RAMP and Z_BIAS have high

frequency of drive and many current frequency and much heat, so it is module type with IC and this module has FET and FET DRIVER IC (IR2113S). On the other hand,when SUS_UP and SUS_DN comes in HIGH at the same time,it is supposed to Shut-down the FET DRIVER IC (IR2113S) to prevent them from turning ON at the same time. The condenser for E/R (Energy Recovery) is fixed for pin 16(ER_COM)of IC4,5,6 to raise energy efficiency,and coils are put in the passage to the SUS_OUT line to fix output ascending and descending roll off when E/R part switching. The SUS_OUT output formed in Z BOARD is supplied to all the ROW of every panel equally. Vs(170-190V) Vz ( Vs-12V )

3

Z Board BLOCK DIAGRAM

SUS_UP

1-a Z_BAIS 4

SUS_DN RAMP 1-b

2-a

Z_SUS_OUT

E/R_UP

E/R_DN

`

Connected to PANEL.

2-b

Z-Board Operation Principles Schematic Diagram of Z Sustain Board Vs

LM317

Vzb

Vs VR ER_UP

Z bias SUS_UP RAMP _UP

L

Vs

SUS_DN

ER_DN

IPM for Sustain Pulse Generation and ER

The part for Ramp of Erase Pulse

The part for Vzb

SUS _ OUT

Z-Board

Picture is dark and wrong discharge(phenomenon)


Check Check the the B+ B+ terminal terminal & & Cable Cable connector connector

IPM Connector Connector of of badness badness :: Picture Picture is is dark dark & & has has too too much much noise noise

Check Check the the Z-Board Z-Board and and cable cable connector connector

Z-Board


Insert to Z-Board and X-Board linking connector is bad

X- Left

X Top - Right

X Top - Center

Check Check the the B+ B+ teminal teminal & & Cable Cable connector connector

-Ve VSC

Connector Connector of of badness badness :: Picture Picture is is dark dark & & has has too too much much noise noise

V setup -Vy Y-SUS

VS

VSC Board

Z-SUS

Va


Check Check the the Z-Board Z-Board and and cable cable connector connector X- Left

X- Left

X-Right

Y-Sustain Board Schematic Diagram of Y Board Vsc

Vs

IPM Er_up

Sus_up

Vsetup 15V(F) Pass_top

Pass_btm

+

15V(F4) Ramp_up

15V(F )SCAN

SCAN DRIVER IC (SN755864APZP)

SUS_UP

15V(F) NSCAN

FGND4

Y

+

15V(F3)

SUS_DN

FGND3

FGND 15V(F) SE +15V(F2) Ramp_dn

Er_dn

15V(F2) SW 15V(F5) SE

Sus_dn

-Vy FGND2 +

voltage LEVEL : Vs, Vsc, Vsetup, -Vy, Ve, +5V, +5V(F),15V, GND FGND, +15V(F), FGND2, +15V(F2), FGND3, +15V(F3) FGND4, +15V(F4), FGND5, +15V(F5), VPP

-Ve FGND5

+

Y-Sustain Board Role of Y Board

Y

0V

Set-up

Set-up Set-up

Scan Scan

Sustain Sustain

Scan

Sustain

□It

is the process of charge form in internal wall and initial reset

□It

affects greatly wall charge form part.

.

□It

is also called address section , confirms if there is X part data. (It is the section that determines existence of operation in sustain section due to the first discharge.

□It

is for PDP Module brightness and graduation form.

(ex. If it has more Sustain , it gets brighter and it indicates graduation and luminance.)

Y-Sustain Board Set up

A2 wave form

Set down 280 V

180 V

Scan polarity inversion(Y)

180 V

70 V

Common sustain polarity inversion (Z)

180 V

180 V

70 V (7) (8)

Data polarity inversion (Y) (1)

(2)

(3)

(4)

Setup (1) 460 V Y

180 V Y

(3) 180 V Z

(6)

Scan ( Address )

(2) 180 V Z

(5)

0V

(4) 180 V Z

Y

70 V Y

Sustain

(5) 180 V Z

0V Y

(9)

(7)

(6) 180 V Z

180 V Y

Erase

0V Z

180 V Y

(8) 0V Z

0V Y

(9) 180 V Z

0V

0V Z

Y

< Sustain stage > < Sustain stage >

< Scan stage >

X

X

X

X 0V

X 70 V

< Set up state > the stage swelling the voltage gradually and increasing the amount of wall charge

the state sagging the voltage gradually and decreasing the formed wall charge in uniform cost without discharge

the stage preparing for Scan ,having uniform cost of wall charge in discharge space

< Scan stage > the stage other line Scanned Nothing happens

the stage 70 V present line is scanned External operation discharge occurs by the voltage authorized to polarity inversion and wall charge of Y polarity inversion part

X

X 0V

the stage wall charge has increased by scan stage

surface 0 Vcharge occurs between Y polarity inversion and Z polarity inversion by the voltage authorized to Y polarity inversion and wall charge of Y polarity inversion part

surface charge occursX between Y polarity0inversion V and Z polarity inversion by the voltage authorized to Z polarity inversion and wall charge of Z polarity inversion part

X 0V < Erase stage > the stage swelling the voltage gradually and dissipating all the wall charge

Y-Sustain Board PDP vs. CRT Display Device

Mechanism of brightness(graduation) expression

PDP b r i g h t n e s s

.....

..... time

1/60 seconds

time

1/60 seconds

CRT b r i g h t n e s s

In the case of PDP, luminance control by current is difficult because of ultraviolet rays saturation by current and visible rays saturation to the ultraviolet lays . Discharge occurs all over the screen period and discharge frequency indicates luminous intensity. (luminance

discharge frequency)

CRT indicates luminous intensity by electron beam intensity and one pixel brightens only once on one screen.

ONE POINT Check Method

42” KK

4. The control method of VR position such as Y-Board V-Setup voltage, VSC voltage, -Vy voltage and voltage VY,VE voltage R8,R9 both end CHECK

VSC voltage R60 both end CHECK

V-SET UP voltage R89 both end CHECK

ONE POINT SVC Guide

Y Board

Flicker is bad

Flicker is bad

X- Left

X Top - Right

X Top - Center

Check Check the the VS, VS, V-SETUP, V-SETUP, confirmation confirmation of of voltage voltage

-Ve VSC

When When there there is is wrong wrong discharge discharge effect effect and and Picture Picture doesn’t doesn’t appear appear

V setup -Vy Y-SUS

VS

VSC Board

Z-SUS

Va


Check Check the the Y-Sustain Y-Sustain Board Board and and cable cable connector connector X- Left

X- Left

X-Right

ONE POINT SVC Guide

Y Board

Flicker is bad

Flicker is bad

X- Left

X Top - Right

X Top - Center

Check Check the the VS, VS, V-SETUP, V-SETUP, confirmation confirmation of of voltage voltage

-Ve VSC

When When there there is is wrong wrong discharge discharge effect effect and and Picture Picture doesn’t doesn’t appear appear

V setup -Vy Y-SUS

VS

VSC Board

Z-SUS

Va


Check Check the the Y-Sustain Y-Sustain Board Board and and cable cable connector connector X- Left

X- Left

X-Right

ONE POINT Check Method 1.

42” KK

The contents to check surely before Z-Board check when screen darkness generates 1) Check the signal Line generated at Module Control Board 2) Check the Cable connected from Module Control Board to X-Board 3) Check the X-Board 4) Check the Cable connected from X-Board to Z-Board

2. The contents to check when voltage of Module Control Board 15V Line is sagged 1) Check the Module Control Board 15V Line Short 2) Check the Y-Driver Board Short 3) Change the Y-Board and Z-Board at the same time when 15V Line voltage is sagged about 8~9V. If only Y-Board is changed, badness can generates again.

3. Module changing, if UP Greade S/W is pressed at VSC Board, LED lamp isn’t turned on and flickered gradually inside VSC Board

Y-Driver Board Inspection Point . The screen isn’t displayed at all Scan FPC wise.

1) If the screen isn’t displayed Scan FPC wise, it may be the problems between relevant Scan FPC and Y DRV B/D 2) Check if the connector of Scan FPC corresponding to the part that isn’t displayed is connected well with Y DRV B/D 3) Check if the Clock, Data signal of relevant Scan FPC input signal of Y DRV B/D is shorted with +5V or Ground. 4) Check if the output buffer of Y B/D related to relevant Scan Drive IC works normally. 5) Check if the signals are authorized well to relevant Scan Drive IC. 6) Check if the relevant Scan Drive IC Failed. 7) Check the PCB pattern.

examples of display type of screen

Normal part The part that isn’t displayed at all

ONE POINT SVC Guide CURTAIN BAR Trouble Types

In In the the case case of of Curtain Curtain Bar Bar

When When setting setting up up to to YYDriver Driver Board, Board, Diode Diode Check the Down Check the Down terminal, terminal, it has a Short-circuit it has a Short-circuit

Both end Diode Check (when Short-circuiting,it has a problem)

In In the the case case of of wrong wrong discharge discharge

When When setting setting up up to to Y-Driver Y-Driver Board, Board, Diode Diode Check Check the the Down Down terminal, terminal, it it has has aa Short-circuit Short-circuit

ONE POINT SVC Guide CURTAIN BAR Trouble Types

ONE POINT SVC Guide

Picture when signal is input

Check Check the the Y-Drive Y-Drive board board connection connection state state module module Or Or an an alien alien substance substance

Horizontal bar

X- Left

X Top - Right


Badness Badness :: horizontal horizontal bar bar

Y-SUS

VS

VSC Board

Z-SUS

Va


Check Check the the Y-Drive Y-Drive Board Board and and module module connection connection film film X- Left

X- Left

X-Right

ONE POINT SVC Guide

Specific part is black and has no picture

Specific part is black and has no picture

X- Left

X Top - Right

X Top - Center

Check Check the the SCAN SCAN Drive Drive IC IC

-Ve VSC V setup -Vy

Check Check the the connection connection

Y-SUS

VS

VSC Board

Z-SUS

Va


Y-Drive Y-Drive Board Board X- Left

X- Left

X-Right

ONE POINT SVC Guide

Picture when there’s no signal

Picture when signal is input

Diode Diode check check Y-Sustain Y-Sustain UP UP Terminal Terminal X- Left

X Top - Right

X Top - Center -Ve VSC

Diode Diode check check Y-Sustain Y-Sustain Down Down Terminal Terminal

V setup -Vy Y-SUS

Y-Drive Y-Drive Board Board Scan Scan Drive Drive IC IC bad bad ,, broken broken or or short short

VS

VSC Board

Z-SUS

Va


Y-Drive Y-Drive Board Board

X- Left

X- Left

X-Right

Module Control Board 50/60KK CTRL Block chart X Data((6*2)*11=132bit A

100MHz (OSC)

X clock Delay

SSC B

A

DA/MEM 4011

SF Mem(3) SF Mem(3)

X, Y, Z Contro

8*3 4EA

3Bit(Serial communication)

8*3

Flash Download B

16*3 (12*3)

Differntial input

TMDS LVDS

TMDS 4Pair

74LVTH 541 Delay

A

SPTC 4021 19

LVDS 10Pair 42” 5Pair

16*3 (12*3)

16

Flash Mem

Frame Memory (1 Dealy) 3EA (arranged deletion)

74LVTH 541 Delay

A

A

DA/MEM 4011

8*3 8*3

Temp Sense

Micom

SF Mem(3) SF Mem(3) 4EA

4

X clock Delay

A

74AC74 Demultiply dircuit X Data((6*2)*11=132bit

ONE POINT SVC Guide

Module Control Board

X- Left

X Top - Right


Y-SUS

VS

VSC Board

Z-SUS

Va


X- Left

X- Left

X-Right

Flicker is bad

Check Check the the controller controller board board connection connection

Check Check the the controller controller board board B+ B+ Voltage Voltage

Replace Replace controller controller board board Module Control Board

ONE POINT SVC Guide

BARS appears at regular intervals

Check Check the the controller controller board board connection connection


Replace Replace controller controller board board


ONE POINT SVC Guide

BARS appears at regular intervals

Control Control board board & & VSC VSC connect connect cable cable Check Check


Replace Replace controller controller board board



ONE POINT SVC Guide

VSC Board

Flicker is bad

VSC Board

X- Left

X Top - Right

X Top - Center

Control Control board board & & VSC VSC connect connect cable cable Check Check

-Ve VSC

Check Check the the VSC VSC B+ B+ Voltage Voltage

V setup -Vy Y-SUS

VSC Board

VS

Z-SUS

Va


Replace Replace VSC VSC board board X- Left

#. VSC : Video scan controller

X- Left

X-Right

ONE POINT SVC Guide

When black ADD BAR appears

Check Check the the firm firm linking linking X-board X-board & & control control board board

Bad work film is torn.

X- Left

X Top - Right


Check Check the the firm firm linking linking X-board X-board & & module module V setup -Vy Y-SUS

Check Check the the COF COF resistor resistor

VS

VSC Board

Z-SUS

Va


Replace Replace module module

X- Left

X- Left

X-Right

ONE POINT SVC Guide

Check Check & & Adjust Adjust :: PFC PFC /VS /VS /VA /VA Voltage Voltage to to panel specification panel specification

X- Left

X Top - Right


Check Check Y-Sustain Y-Sustain Sub-amp Sub-amp waveform waveform V setup -Vy Y-SUS

Replace Replace Y-Sustain Y-Sustain amp amp

VS

VSC Board

Z-SUS

Va


Not Not Resolved? Resolved? Replace Replace Control Control board board

X- Left

X- Left

X-Right

ONE POINT SVC Guide


X- Left

X Top - Right



Okey? Okey? Replace Replace Y-Sustain Y-Sustain amp amp

VS

VSC Board

Z-SUS

Va



X- Left

X- Left

X-Right

ONE POINT SVC Guide


X- Left

X Top - Right




VS

VSC Board

Z-SUS

Va



X- Left

X- Left

X-Right

ONE POINT SVC Guide Check Check & & Adjust Adjust :: PFC PFC /VS /VS /VA /VA Voltage Voltage to to panel panel specification specification Check Check Y-Sustain Y-Sustain Sub-amp Sub-amp waveform waveform



X- Left

X Top - Right


Y-SUS

VS

VSC Board

Z-SUS

Va


Y-Sustain waveform test point

Y-Sustain waveform

X- Left

X- Left

X-Right

ONE POINT SVC Guide Check Check & & Adjust Adjust :: PFC PFC /VS /VS /VA /VA Voltage Voltage to to panel panel specification specification Check Check the the connection connection VSC VSC & & Control Control board board

Okey? Okey? Replace Replace VSC VSC Board Board


X- Left

X Top - Right


Y-SUS

VS

VSC Board

Z-SUS

Va


VSC Connector

VSC Board

Control Board X- Left

X- Left

X-Right

ONE POINT SVC Guide Check Check & & Adjust Adjust :: PFC PFC /VS /VS /VA /VA Voltage Voltage to to panel panel specification specification Check Check the the X-board X-board waveform waveform

Okey? Okey? Replace Replace XX- Board Board

Not Not Resolved? Resolved? Check Check for for C.O.F C.O.F IC IC Short Short

X-board connection

Waveform

C.O.F Check

ONE POINT SVC Guide Check Check & & Adjust Adjust :: PFC/VS/ PFC/VS/ VA VA Voltage Voltage to to panel panel Specification Specification Check Check Y-Sustain Y-Sustain Sub-amp Sub-amp wave wave form form Okay? Okay? Replace Replace Y-Sustain Y-Sustain Amp Amp Not Not Resolved? Resolved? Replace Replace Controller Controller Board Board Not Not Resolved? Resolved? Panel Panel

Y Sustain waveform test point

Y Sustain waveform

Control board

Lg Pdp Training Manual 2005

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