2010 FHD Plasma TV G20 G25 Series Troubleshooting Handbook

Cov over er P ag age e

2010 - FHD Pl as m a TV Tr o u b l es h oo oott i n g Han Han d b o o k 2010- Plasma FHD TV – (13 t h Generation) Applies to models: TC-P42G25 TC-P46G25 TC-P50G20 TC-P50G25 TC-P54G20 TC-P54G25

G20 G2 0 & G2 G25 5 Series Seri es

SOS Detect (Shutdown) When an abnormality occurs in the unit, the “SOS Detect” circuit is triggered and the TV shuts down. The Th e power LED on the front panel will flash a pattern indicating the circuit that has failed. Cautions:

If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. S ome ome st steps require removal removal of connectors and som sometim etimes es P C boards removal. removal. Do Do not allow the the TV TV to run for more than 30 seconds while connectors or boards are disconnected. NOTE: When taking voltage reading, place your meter’s probe on the test point or pin indicated before

connecting the TV to the AC line. The voltage you intent to measure may only appear for a brief moment. The Vsus Vsus line has large cap capacit citors ors that hold the cha charge for som some time even after the TV has been turned off off and Warning: The unplugged. unplugged. When dis disconnecting connecting P 2/SC 2/SC2 or P11/S P11/SS S1, bleed the the remaining remaining charge of the the Vsus Vsus before reconnecting the the cable.

Power LED Error Code Definition and the Failure-CausingBoards

LIST OF BOARDS POSSIBLY CASUSING THE FAILURE

POWER LED ERROR

CONDITIONS TRIGGERING

CIRCUIT MONITORED

THE SHUTDOWN

CODE

MOST

2ND

OCCASIONALLY

RARELY

A

¤

¤

¤

SC

P

SS

A

C1 or C2

A

Panel

¤

P

A

¤

¤

SC,SS

C2

A

¤

SC

A

¤

C

COMMON 1 BLINLK

Panel Information SOS Panel Alarm SOS

Communication problem between CPUs on A board. Missing P15V P15V is not been generated by the P board. P15V is been affected by one of the boards it is connected to (A short circuit of the P15V). Wrong diagnostic by the A board Missing P3.3V Reasons: The A board is not generating the 3.3V The 3.3V is been affected by one of the C boards or the Panel (A short circuit of the P3.3V). Wrong diagnostic by the A board Regulation issues with any of the voltages output from the power supply. Wrong diagnostic by the A board Missing P5V Reasons: The A board is not generating the 5V The 5V is been affected by the SC, SS, A, or C2 board (A short circuit of the P5V). Wrong diagnostic by the A board An increase or reduction of the Energy Recovery Circuit output (MID). Open connection between connector A33 on the A board and SC20 on the SC board. Open connection between any of the ribbon cables on the C boards and the A board. Open connection between the ribbon cable/cables •

2 BLINKS

P15V form the P board

3 BLINKS

P3.3V from the A board

4 BLINKS

Power Supply output voltages

5 BLINKS

P5V from the A board

6 BLINKS

SC Energy Recovery Circuit

•

• •

• •

Power LED Error Code Definition

LIST OF BOARDS POSSIBLY CASUSING THE FAILURE

POWER LED ERROR

CONDITIONS TRIGGERING

CIRCUIT MONITORED

THE SHUTDOWN

CODE

MOST

2ND

OCCASIONALLY

RARELY

SC

SM

Panel+SC+SM

A

SS

Panel

A

C2

A

¤

¤

¤

SS

SC

A- P

K

A

¤

¤

¤

COMMON

7 BLINKS

Missing Vsus. Abnormality of the scan circuit output, the 15V_F, the Scan Drive Circuit and scn_pro, and Vscn circuit. Connection between the SC Loose or open Connection between the SC board and the board and the SM(SU/SD) SM(SU/SD) board (SC41, SC42, SC46). board. Open or loose connection between connectors SC2/P2 Wrong diagnostic by the A board

8 BLINKS

Sustain Drive Circuit and Connection between the SS board and the Panel.

9 BLINKS

Discharge Control Circuit (IC9300)

Abnormality of the Sustain drive circuit. Open or loose connection between the SS board and FPCs from the panel (SS61, SS64, SS21, SS24 and SS58). Open or loose connection between connectors C10/C20 Wrong diagnostic by the A board Failure of IC9300 Abnormalities of the F+15V. Reasons: The P board is not generating the F+15V SUB Voltages are affected by the K board or by metal object present in the SD card slot.. Shorted Vsus (By the SS board or SC board). Shorted Vda (By the panel, C1, or C2 board) Wrong diagnostic by the A board. • •

10 BLINKS

12 BLINKS

AUDIO AMP

Abnormalities of the Audio AMP

Boards Replacement by Blinking Code (G20/G25 Series) Blink Code

List of boards likely to cause the symptom. (Based on Actual Reports and Circuit Operation) Most Common

2nd

3rd

4th

5th

6th

A

1

A

2

SC

P

SS

A

3

SC

C1

C2

C3

Panel

4

SC

P

A

SS

SD

5

SD

SC

SS

C2

A

6

SC

SD

A

C

7

SC

SU

SM

SD

8

SS

A

Panel

C2

9

A

10

SC

A

SD

SS

11

Fan

A

12

A

Speakers

This part can possibly cause this error code, but so far there has not been any report of this part

This part can possibly cause this error code and it has been confirmed to cause this

Panel

A

SU

P

7th

K

Technically, this part is not likely to cause this error code, but it has been confirmed to cause this

Quick Procedure To Check For Short or Low Resistance Condition of the Vsus, Vda, and P15V Lines

Quick Procedure To Check For Short o r Low Resistance Condition of the Vsus, Vda, and P15V Lines Note: Vsus is generated by the Power supply and is only used by the SS and SC boards Vda is generated by the Power supply and is only used by the Panel (Panel Drive ICs) P15V is generated by the Power supply and is used by the A, SS, and SC boards Test poin ts for the Vsus, Vda, and P15V can be easil y fou nd o n the P board. To check for s hort ci rcuit or low resistance on these lines, follow t his proc edure: Preparation

1.

Make sure the TV is disconnected.

2.

Remove any residual charge from the Vsus and Vda lines by momentarily grounding them through a 500 ohms resistor (At least 5Watts).

3.

Measure the resistance between chassis ground and the pins indicated on the table below. A dead short or a reading lower than 1K indicates a shorted or partially shorted line.

TC-P42G25

Voltage Test Points Connector /

Pin Number

Voltage

P11/White

1

Vsus

P11/Brown

4

P15V

P35/White

1

Vda

Wire Color

TC-P46G25

Quick Procedure To Determine the Cause of the Problem if a short or Low Resistance Reading is Found

Quick Procedure To Determine the Cause of the Problem if a shor t or Low Resistance Reading is Found Note: For a detailed procedure, see pages 11~16 Shorted Vsus

Note: Vsus is generated by the Power supply and is only used by the SS and SC boards

If a short is found on the Vsus line, remove connectors P 2/SC2 and P11/SS11 one at a time to determine if the SC board or the SS board is defective. Shorted Vda

Vda is generated by the Power supply and is only used by the Panel (Panel Drive ICs)

If a short is found on the Vda line, is likely that the panel or one of the C boards is defective. To determine which is defective, remove connector C10 between the C1 and C2 boards and the panel’s flex-cables connected to the C boards one at a time. Shorted P15V P15V is generated by the

Power supply and is used by the A, SS, and SC boards If a short is found on the P15V line, remove connectors P6, P11, P25, and SC20 one at a time to determine which board is defective. A shorted P15 is primarily caused by the following boards in the order presented; SC, P, A, and SS boards. Note: Even though is not

Detailed Troubleshooting Procedure for Shorted Vsus

Detailed Troubleshooting Procedure for Shorted Vsus

See the picture on page 10 for connector’s location

Measure the resistance between pin1 of connector SC2 on the SC board and ground (Chassis).

Replace the SS board

Replace the SC board

Start Here

Unplug connectors P2 and P11, on the P board. Measure the resistance between pin 1 of connector P2 and ground (Chassis)

No

Is there a short circuit?

Yes

No


Yes

No


Yes

Replace the P board

Measure the resistance between pin1 of connector SS11 on the SS board and ground (Chassis).

Replace the SC and SS boards

Detailed Troubleshooting Procedure for Shorted P15

Detailed Troubleshooting Procedure for Shorted P15V See the picture on page 10 for connector’s location

Start Here

Unplug connectors P6 and P11, on the P board. Measure the resistance between pin 1 of connector P6 and ground (Chassis)

No


Yes

Replace the P board

Reconnect P11 and measure the resistance between pin 1 of connector P6 and ground (Chassis)

No


Yes

Is there a short

Yes

Replace the SS board

Disconnect SC20 on the SC board and reconnect P6. Measure the resistance between pin 1 of connector P6 and ground (Chassis)


No

Replace the A board

Detailed Troubleshooting Procedure for Shorted Vda

Detailed Troubleshooting Procedure for Shorted Vda Start Here

Unplug the connector P35 on the P board and check the resistance between pin 1 of connector P35 on the P board and ground (Chassis).

No

TC-P42G25

TC-P50G20

TC-P46G25

TC-P50G25

Is there a short circuit ?

Replace the P board

Reconnect P35 and unplug the ribbon cable between the C2 and C3 boards. Measure the resistance between pin 1 of connector P35 on the P board and ground (Chassis)

TC-P54G20 Reconnect P35 and unplug the ribbon cable between the C1 and C2 boards. Measure the resistance between pin 1 of connector P35 on the P board and ground (Chassis)

Yes

TC-P54G25

Reconnect the ribbon cable between the C2 and C3 boards and unplug the ribbon cable between the C1 and C2 boards. Measure the resistance between pin 1 of connector P35 on the P board and ground (Chassis)

No


No


Yes

Yes

The problem coul d be the C1 board or the panel. Proceed to isolate the panel from the C1 board to determine which is bad.

Yes


The problem coul d be the C2 board or the panel. Proceed to isolate the panel from the C2 board to determine which is bad.

No

The problem could be the C3 board or the panel. Proceed to isolate the panel from the C3 board to determine which is bad.

Troubleshooting 1 Blink Failure

Troubleshooting 1 Blink Failure

If the TV shuts down and the power LED bli nks 1 time, replace the A

Troubleshooting 2 Blinks Failure

Troubleshooting 2 Blinks Failure (1 of 2) Cautions: Disconnect the AC Power prior to making any disconnection or connection.

If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.) Check connections between P6 on the P board and A6 on the A board.

P6/A6 connection

TC-P42G25

TC-P46G25 TC-P50G20 TC-P50G25

Troubleshooting 2 Blinks Failure (2 of 2) Blink Code

List of boards likely to cause this symptom. (Based on reports and circuit operation). Most Common

2nd

3rd

4th

2

SC

P

SS

A

This part can possibly cause this error code and it has been confirmed to cause this symptom.

5th

6th

7th

This part can possibly cause this error code, but there has not been any reports of this part causing this symptom.

See the picture on page 10 for con nector’s l ocation Start Here

Follow the procedure on slide 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading.

Unplug the TV and disconnect SC20 on the SC board. Plug in the TV and turn the power on


Replace the P

6 Blinks

No

Noa short Is there Yes circuit of the Vsus, Vda, or P15V?

Yes

How many times is the power LED blinking?

No

Is there

Follow the procedure on sli des 9~16

2 Blinks

Yes

Unplug the TV. Get ready to measure the voltage at pin 1 of connector P6 on the power supply. Plug in the TV and turn it on.

Replace the A

Trouble rou blesho shooti oting ng 3 Blinks Bli nks Failure ilu re

Tro Troublesho shooting 3 Bli Blinks F ailure (1 of 2) Disconnect connect the the AC P ower prior to to making making any disc disconnection onnection or connection. Cautions: Dis If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

The The distr stribution of the P 3.3V .3V is done through ribbon cables. Measurin Measuring g the P 3.3V might be a little challenging and difficult. To easily measure the P3.3V, locate the the test point TP 9201or 9201or coil L9000 on the A board.

A

Tro Troublesho shooting 3 Bli Blinks F ailure (2 of 2) Blink Code

List of boards likely to cause this symptom. (Based on reports and circuit operation). Most C ommon

2nd

3rd

4th

5th

6th

SC

C1

C2

C3

Pan el

A

3

This This part art can can possib ssibly cau cause this error code, but so far there there has not been any report of this part causing this symptom.

This This part art can can possib ssibly cau cause this error code and it has been confirmed to cause this symptom. Start Here

Unplug the TV and check the resistance between TP920 TP9201 on the A board and ground (Cha (Chassis) ssis).. (Go to the previous slide (Slide 45) to see a picture showing the the location of TP 9201.) 9201.)

Disconnect the ribbon cable between C2 and C3 (C26) and reconnect A32. Measure the resistan resistance ce between between TP920 TP9201 and ground (Chassis)

No

Tech Techn nica ically lly, this part is not lik likely ely to cause this error code, but it has been confirmed to cause this symptom.


Yes

No

Replace the A b oard oar d


Is there a short circuit of the Vsus, Vda, or P15V?


No

Yes

50” & 54”

No Reconnect C26 and and disconnect A32 A32


Disconnect the ribbon cable between C1 and C2 and reconnect A31. Measure the resistance between TP9201 and ground (Chassis)

No The problem could be the C3 C3

Follow the procedure on sli des 9~16 9~16

Unplug connectors A31 and A32, on the A board. Measure the resistance between between TP92 TP 9201 01 and ground ground (Chassis (Chassis))

Yes

42” & 46”

Yes

7th

Yes

Replace the A board


Yes

The problem could b e the C1 C1


Troubleshooting a 4 Blinks Failur e (1 of 2)

Cautions: Disconnect the AC Power prior to making any disconnection or connection.

If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

Blink Code 4


2nd

3rd

4th

5th

SC

P

A

SS

SD

This part can possibly cause this error code, but so far there has not been any report of this part causing this symptom.


6th

7th

Technically, this part is not likely to cause this error code, but it has been confirmed to cause this symptom.

Troubleshooting a 4 Blinks Failur e (2 of 2) See the picture on page 10 for con nector’s l ocation

Start Here


No Unplug the TV and disconnect SC20 on the SC board. Turn the power on


Yes



6 Blinks


4 Blinks Unplug the TV and get ready to measure the voltage at pin 9 of connector P7. Plug in the TV and turn it on.

Replace the A board

No

Is there 3V present?

Yes

Replace the P board


Troubleshooting 5 Blinks Failur e (1 of 3) Cautions: Disconnect the AC Power prior to making any disconnection or connection.


Blink Code


2nd

3rd

4th

5th

5

SD

A

SC

SS

C2



6th

7th


Troubleshooting

Unplug the TV and do a resistance test between the P5V and ground to determine if the P5V is shorted or not. P5V not short ed (Only the A and P board are suspected of causing the problem)

If the P5V is not shorted, the possibilities of the SC, C2, and SS boards of being defective are eliminated. To determine between the P board and the A board, connect the TV, turn the power on, and check to see if the P5V is present. If P5V is present, the A board is likely to be defective. If P5V is missing, the P board is defective.

Troubleshooting 5 Blinks Failur e (2 of 3) To easily measure the P5V, locate the coil L9801. The location of L9801 is shown in the image below

A

P5V (L9801) Location

Troubleshooting 5 Blinks Failur e (3 of 3) Start Here

Follow the procedure on page 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading.

Yes

No


Is there a short circuit of the Vsus, Vda, or P15V? Unplug the TV and check the resistance between L9801 on the A board and ground (Chassis). (Go to the previous page (Slide30) to see a picture showing the location of L9801.)

Unplug the TV and disconnect SC20 on the SC board. Turn the power on

6 Blinks


Replace the SC board It’s rare but possib le for the SD board to cause this problem. Reconnect SC20 an follow procedure on page41 To isolate the SD board.

No


Unplug connectors A33 and A32, on the A board. Measure the resistance between L9801 of and ground (Chassis)

Yes

Replace the A board

5 Blinks

Reconnect A33 and measure the resistance between L9801 and ground (Chassis) Loosen the A board and disconnect SS33 on the SS board or C23 on the C2 board. Reconnect A32. Measure the resistance between L9801 and ground (Chassis)

Yes

No


Yes

No


Yes


Troubleshooting 6 Blinks Failur e (1 of 2) Cautions: Disconnect the AC Power prior to making any disconnection or connection.


Blink Code

List of boards likely to cause this symptom. (Based on actual reports and circuit operation). Most Common

2nd

3rd

4th

6

SC

SD

A

C



5th

6th

7th


Energy Recovery/Vscan

The energy recovery circuit and Vscan are monitored in the SC board. Failure of any these 2 circuits triggers the SOS6 line causing the unit to shut down and the power LED to blink 6 times. Under normal operation, the output voltage (MID) of the “Energy Recovery” circuit ranges between 68V and 138V. If the voltage drops below 67V or increases above 139V, the error detect circuit (IC16581) is triggered. This causes a high to be output to pin 21 of connector SC20. Pin 21of SC20 also goes high, if the Vscan generating circuit fails. The voltage from SC20 is connected to pin 90 the SYSTEM MPU (IC1100) in the A board via the ANALOG-ASIC(IC5480). When pin 90 of the SYSTEM MPU (IC1100) goes high, the TV shuts down and the power LED blinks 6 times.

Troubleshooting 6 Blinks Failur e (2 of 2) See the picture on page 10 for connector’s location Start Here


No


Yes

Follow the procedure on the pages 9~16

Unplug the TV and verify that all the cables on the SC board are properly seated. Also check the ribbon cables and connectors on the A and C boards. Disconnect connector SC20 on the SC board and connector C10 on the C1 board. Plug in the TV and turn it on

Replace the A board

6 Blinks

No

Did the number of blinks change to 8 blinks?

Yes

8 Blinks



Troubleshooting 7 Blinks Failur e (1 of 2)


Wait at least 2 minutes before the removal of any connector. If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.) Remove the front cabinet and expose the panel to a bright light for a thorough visual inspection. Check for cracks and blown pixels or any other abnormalities. Check for burnt spots on the SM board.

Blink Code


2nd

3rd

4th

5th

6th

7

SC

SU

SM

SD

Panel

A

This part can possibly cause this error code, but there has not been any report of this part causing this symptom.

7th


Warning: The Vsus line has large capacitors that hold the charge for some time even after the TV has been turned off and

unplugged. When disconnecting P2/SC2 or P11/SS1, bleed the remaining charge of the Vsus before reconnecting the cable.

Troubleshooting 7 Blinks Failur e (2 of 2)

Check the panel for abnormalities and burnt pixels.

Start Here

Unplug the TV and check all the connectors on the SC, SU, and SD (42” = SM board). Make sure they are properly seated. If the TV still shuts down with 7 blinks, unplug it and follow the procedure on page 8 to check the Vsus, Vda, and P15V for short circuit or low resistance reading. Disconnect SC20. Plug in the TV and turn it on

Yes

6 Blink s

Did the number of blinks changed to 6 blinks?

No

No 7 Blinks

Yes


Disconnect the TV and reconnectSC20. Plug-in the TV. Set your voltmeter to measure the voltage at pin 9 of connector P7 on the P board. Turn the TV on.

No Unplug the TV and reconnect SC20. Isolate both the SU and SD boards together (Follow the procedure on page 38). Plug in the TV and turn it on. Note: Do not allow the TV to stay on for more than 30 seconds



Yes

Is the TV still shutting down ?

Replace the SM board

Replace the A board

Yes

Replace the P board

No Yes

Is the TV still shutting down?

No

Replace the SU board

42” 46” -50” -54”

The problem may be the SU, SD, or both. Even though is not required, the esistance test procedure on page42 can

Is there 3V briefly?

Unplug the TV and isolate only the SU

Unplug the TV and isolate only the SD board. Follow the procedure on page 41

No

Is the TV still shutting

Yes

SU-SD boards (Together) Isolation Procedure

SU-SD boards (Together) Isolation Procedure Preparation:

Disconnect AC Power prior to making any disconnection or connection. Wait at least 2 minutes before the removal of any connector. Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. Procedure:

1.

Remove the 4 VFG screws from the SU and SD boards. (See picture.)

2.

Remove SC41, SC42, and SC46 from the SC board. Also remove the ribbon cable between the SU and SD boards (SU11/SD11).

3.

Install the SC50 J ig or just jump pins 1 and 2 of connector SC50 on the SC board.

Actual SC50 J ig

SU Board Isolation Procedure To isolate either the SU or the SD board individually, all the connectors, (Except the panel flex-cables) and the VF-GND screws on the board have to be removed. (See the picture below)

Preparation:

Disconnect AC Power prior to making any disconnection or connection. Wait at least 2 minutes before the removal of any connector. Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.

SU board Isolation Procedur e

1.

Remove the 2 VFG screws from the SU board. Note: The 2 screws on the SD board should be installed.

2.

Remove SC41/SU41 and the ribbon cable between the SU and SD boards (SU11/SD11). Note: SC46 and SC42 should be connected

3.


Actual SC50 J ig

SD Board Isolation Procedure To isolate either the SU or the SD board individually, all the connectors, (Except the panel flex-cables) and the VF-GND screws on the board have to be removed. (See the picture below)

Preparation:

Disconnect AC Power prior to making any disconnection or connection. Wait at least 2 minutes before the removal of any connector. Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.

SU board Isolation Procedur e

1.

Remove the 2 VFG screws from the SD board. Note: The 2 screws on the SU board should be installed.

2.

Remove SC46/SD46 and SC42/SD42 and the ribbon cable between the SU and SD boards (SU11/SD11). Note: Make sure SC41/SU41is connected.

3.


Actual SC50 J ig

Vfo, VSCN-F, & 5V_F Resistance Measurements (SU-SD boards)

Vfo, VSCN-F, & 5V_F Resistance Measurements (SU-SD boards) Preparation:

Disconnect AC Power prior to making any disconnection or connection. Wait at least 2 minutes before the removal of any connector. Note: If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. Procedure:

1.

Remove the 4 VFG screws from the SU and SD boards. (See picture to the next page (page 44).)

2.

Disconnect SC41, SC42, and SC46 from the SC board. Also remove the ribbon cable between the SU and SD boards (SU11/SD11). (See picture on the next page (Page 44).)

3.

Using the VF-Ground (VF_GND) as reference, measure the Vfo, VSCN-F, and 5V-F resistance’s on the SU and SD boards individually. (Use the test points around SU41 and SD42 shown on the pictures on the next page (page44). The board is considered to be bad is a short circuit or a very low resistance reading is found on any of these lines. SC41/SU41 Pin Number

Test Point

Test Point

Ar oun d SU41

SC42/SD42 Pin Number

Line

Resistance Reading w ith SC41 Removed

2

TPSU15

1

TPSD29

VFO

2.2M

4

TPSU16

2

TPSD28

VSCN-F (TPSC1)

221K

8

TPSU17

6

TPSD26

5V_F

5.7M

9

TPSU18

VF_GND

Reference Ground

This test is done to determine if the SU, or SD are bad

Aro un d SD42

Vfo, VSCN-F, & 5V_F Resistance Measurements (SU-SD boards) SU Board

SC Board

SC

VF-GND

SD Board



Vsus Vda Vsus P15V

P A

P6

3

A6

3

P15V

5V

SS P11

SS11

VsusVsus pulse

1

1

4

4

ENERGY RECOVERY

D16253

N I A M L N O E N A P

15V IC16251 (8X) SOS DETECT

IC1100 SYSTEM MPU 66

IC5480

A32 63 68

SOS8

ANA LOG ASIC 30

PANEL _SOS

D16255 8 SD16280 O S 1 7

SS33

4

SS61

SS64

Q16280 SS21

SS24

P5V

P5V SS58

SS2

P5V SOS8

C21 6

1

1 7

C23

C2

Troubleshooting 8 Blinks Failure Cautions: Disconnect the AC Power prior to making any disconnection or connection.

If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off. When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.) Blink Code


2nd

3rd

4th

8

SS

A

Panel

C2 Connections

This part can possibly cause this error code, but there has not been any report of this part causing this symptom. See the picture on page 10 for connector’s location

5th

6th

7th


Start Here

Check all the cables between the SS board and the panel. Make sure they are properly seated in the connectors. Unplug the TV and disconnect SS33 on the SS board. Plug in the TV and turn it on

Check connections between the SS, C2, and A bo ards. If ok, replace the A board

No

Note: Perform firmware upgrade after replacing the SC or SS boards

Does the TV turn on and stay on?

Yes

Unplug the TV. Check for continuity between pins 1 and 2 of connectors SS61 and SS64 on the SS board . On connector SS21, check continuity between 6 and 7. (Go to the previous slide to see picture of connectors location). Do not plug in the TV.


Troubleshooting 9 Blinks Failure This condition can cause the TV to shutdown and the power LED to blink 9 time 1.

Failure of PD4 IC9300 (Discharge c ont rol )

9 blinks can be caused by failure of IC9300, IC5480, and IC1100. Since all these ICs are located on the A board, only the A board should be replaced. Start Here Replace the A board

IC603 POWER MICOM

P A

P7

7

A7

7

L N O E N N I A A P M

IC1100 SYSTEM MPU 90

IC5480 IC9300 PD4

ANA LOG ASIC

PANEL _SOS

Troubleshooting 10 Blinks Failure At Plug in

Troubleshooting 10 Blinks Failure At Plug in Start Here

Unplug the TV. Make sure P6 and P7 on the P board are properly seated. Plug in the TV but do not turn the power on

Unplug the TV. Using a voltmeter, place the positive probe at pin 6 of connector P7 while the negative probe is grounded. Plug in the TV

Note: When taking voltage reading, place the

voltmeter probe at the connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down.

Unplug the TV and disconnect connector A1 on the A board. Plug in the TV. Do not turn the power on

Replace The A board

NO

NO

NO

Is there 3.2V Yes present for a couple of seconds when the TV is plugged into the AC line?

Do the AC relays Yes click after the TV is plugged into the AC line?

Unplug the TV. Disconnect connectors A1 on the A board and Plug in the TV and press the power switch

Do the AC relays Yes click after the TV is plugged into the AC line?

Replace The P board

If the cable between connectors K 1 and A1 is OK, Replace the K board.

Is No there 15V at pin 7 of connector P6/A6 when the TV is plugged into the AC line?

Yes

Replace The P board

Troubleshooting 10 Blinks Failure At Power on

Troubleshooting 10 Blinks Failure After Power On Blink Code

10


2nd

3rd

4th

5th

6th

7th

SC

A

SD

SS

SU

P

K




Start Here


Unplug the TV and disconnect SC20 on the SC board. Turn the power on

6 Blinks


It’s rare but possible for the SU or the SD board to cause this failure. Reconnect SC20 and follow the procedure on page 38 and isolate the SU and SD

No


10 Blinks

Yes


Replace the A board

Proceed to isolate the SD and SU board s individually as


Troubleshooting 12 Blinks Failure These 3 condit ion s can cause the TV to shut down and the power LED to blin k 12 times 1. 2. 3.

A Bo ard . Pinched speaker wire. Speakers

Blink Code

12


2nd

A

Speaker

This part can possibly cause this error code, but so far there has not been any report of this part causing this symptom. This part can possibly cause this error code and it has been confirmed to cause this symptom. Technically, this part is not likely to cause this error code, but it has been confirmed to cause this symptom.

3rd

4th

5th

6th

7th

Troubleshooting 12 Blinks Failure Cautions: Disconnect the AC Power prior to making any disconnection or connection.


Start Here

Unplug the TV and disconnect connectors A11 and A12 from the A board. Plug in the TV and press the power switch

Yes If th e speakers wires are not p inched, Replace the sp eaker

Does the TV power up and stay on?

No

Replace the A board

Troubleshooting No Power/Dead Unit

Troubleshooting No Power/Dead Unit These 3 condit ions can cause the TV to be dead with no power. 1. 2. 3.

A Bo ard . P Board. K Board

Condition

List of boards likely to cause this symptom. Most Common

2nd

3rd

P

A

K

Dead

4th

5th

6th

7th


When taking voltage reading, place the voltmeter probe at the test point, component, or connector’s pin indicated before connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is shutting down, expect the voltage to only come up a couple of seconds.)

P7

P

A7

A

IC5480 STB Circuit

STB5V

1

3.3V REG

1

P9 Power MICOM

RELAY

IC603

5

5

7

7

3.2V

TV_SUB_ON

K

3

3

6

6

5

5

STB3.3V IC1100 Vcc SYSTEM MPU KEY_INPUT

PANEL_MAIN_ON

3.2V

POWER SWITCH

REMOTE REC.

A1

K1

LED

Troubleshooting No Power/Dead Unit Start Here Plug in the TV. Do not turn t he power on

Unplug the TV and place your volt-meter on pin 1 of connector P7. Plug in the TV But do not turn the power on

Yes

Is there 5V present NO when the TV is plugged into the AC line?

NO

Do the AC relays click after the TV is plugged into the AC line?

Yes

Unplug the TV and place your volt-meter on pin 7 of connector P7. Plug in the TV and press the power switch

Replace The P board. (Check the AC Cord)

NO Unplug the TV and disconnect A1 on the A board. Plug in the TV but do not turn the power on

NO

Do the relays click now?

Unplug the TV and disconnect A1 on the A board. Plug in the TV and turn the power on

Yes

Yes

Replace

Is the TV turning On

NO

Is there 3.2V present when the power button is pressed?

Yes

TV’s Behavior After Connectors Removal

TV’s Behavior After Connectors Removal

TC-P42G25

MODEL N0. TC-P42S2 (Connectors Removal on the SS + combination of connectors on the SS board and SC board) Connector

Connector

Connector on SC Board

Connector on SC Board

SS11

SS11

TV Stays On SS33

TV Stays On

SS33

TV Stays On

SS11

SS11

SC2

SOS 7 Blinks

SS33

SC2

SOS 7 Blinks

SS33

SC2

SOS 7 Blinks

SS11 SS33

SS11

Result

SC20

SOS 6 Blinks

SC20

SOS 6 Blinks

SS33

SC2

SC20

SOS 6 Blinks

SS33

SC2

SC20

SOS 6 Blinks

MODEL N0. TC-P42S2 (Connectors Removal on the SC Board) Connector

Connector

Connector on C1 Board

Result SOS 7 Blinks

SC2

SOS 6 Blinks

SC20 SC2

SOS 6 Blinks

SC20 C10

SOS 8 Blinks

SC20

C10

SOS 8 Blinks

SC20

C10

SOS 8 Blinks

SC2

SC2

MODEL N0. TC-P42S2 (Connectors Removal on the A Board) Connector

Connector

Connector

A20 A31

TV Stays On (L-side OK/R-side Black) A32

A20

Result

SOS 6 Blinks

A31

SOS 6 Blinks SOS 6 Blinks

2010 FHD Plasma TV G20 G25 Series Troubleshooting Handbook

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