Hi Guys, This is my first post. I am pretty new to TV repairs, I have intermediate Knowledge with electronics,
and wish to further my knowledge in all aspects of electronics repairs.
I have a few LED TV's to repair, I am currently working on the following unit.
Sony Model KD49X8005C
SMPS Board <> 1-980-310-11
Main Board <> 1-894-595-12
White Sticker Sony (GL6) APS-395 4-574-565-01
White Sticker APS-395(CH) 147463311-1511M000532
When plugged in, the standby light is white for around 10 seconds, then fades to nothing.
There are no signs of life on the screen, just a black screen.
There is no sound from speakers.
The optical output on the main board turns red for around 8 seconds.
I have taken the following readings from the SMPS, and a few from the MAIN Logic board.
I would appreciate if someone could please point me in the right direction, as to what voltages I should be getting,
or where I should try testing next.
I can supply any pictures needed to assist further.
No Sound
No Backlight (unless tested with LED Tester),
Tried Hard Reset, Got Green Indicator light, No Difference.
Tried Firmware update. No Difference.
Any assistance in trying to fix this unit or advice on what my next step would be will be very much appreciated.
Regards
Stevie
Connector CN6401
2- DC-Dimmer--------- 0.0v_______1- NC------------------- NC
4- PWM-Dimmer------- 0.0v_______3- BL-ON--------------- 0.0v Pin 7
6- Blinking------------- 0.0v_______5- STBY-3.3v----------- 3.49v
8- BL-ERR-------------- 2.386v_____7- AC-OFF-DET--------- 3.49v pin 3
10- GND--------------- GND_______9- Power-ON------------ 3.481v
12- GND--------------- GND_______11- GND---------------- GND
14- REG 12v----------- 12.87v_____13- REG-12v----------- 12.87v
16- REG 12v----------- 12.87v_____15- REG-12v----------- 12.87v
18- REG 12v----------- 12.87v_____17- REG-12v----------- 12.87v
20- GND--------------- GND_______19- GND---------------- GND
22- GND--------------- GND_______21- GND---------------- GND
24- T-Con-ON--------- 0.0v_______23- GND---------------- GND
26- T-C0n-VCC-12v--- 0.0v_______25- T-Con-VCC-12v---- 0.0v
28- T-Con-VCC-12v--- 0.0v_______27- T-Con-VCC-12v---- 0.0v
Connector CN6801
+ LED = 95.46v Ground to Chassis
- LED = 14.98v Ground to Chassis
Backlights were tested via LED Backlight tester connected to unplugged CN6801 at 96V, All bulbs seem to light correctly.
Here are some of the voltages I measured from the SMPS Board.
SMPS Board__________SMPS Board_________SMPS Board
(Chassis GND)________(Chassis GND)_______(Chassis GND)
D6201 = 3.493v_______R6806 = 0.0v_______C6408 = 12.67v
D6202 = 3.493v_______R6807 = 12.87v_____C6409 = 12.67v
D6401 = 12.87v_______R6420 = 12.87v
D6402 = 12.87v_______R6421 = 12.97v
D6801 = 95.50v_______R6419 = 0.0v
D6802 = 95.50v_______R6410 = 12.87v
D6803 = 95.50v_______R6804 = 95.40v
D6804 = 95.50v_______R6809 = 0.0v
D6805 = 95.40v_______R6207 = 3.491v
D6806 = 95.40v
D6814 = 15.06v
Here are some of the voltages I measured from the MAIN Logic Board.
Main Board___________Main Board____________Main Board
IC9003 (D9D320)______IC7702 (00GA3W)______IC9001 (D9D320)
Pin1 = 3.468v_________Pin1 = 3.325v_________Pin1 = 3.453v
Pin2 = 0.775v_________Pin2 = 0.800v_________Pin2 = 0.0029v
Pin3 = 5.290v_________Pin3 = 0.0v___________Pin3 = 5.259v
Pin4 = 2.512v_________Pin4 = 0.0v___________Pin4 = 2.509v
Pin5 = 0.0v___________Pin5 = 5.00v__________Pin5 = 0.0015v
Pin6 = 3.402v_________Pin6 = 0.0v___________Pin6 = 5.004v
Pin7 = 8.260v_________Pin7 = 0.0v___________Pin7 = 9.909v
Pin8 = 12.840v________Pin8 = 5.01v__________Pin8 = 12.799v
(Chassis GND)________(Chassis GND)_________(Chassis GND)
As I said any assistance in trying to fix this unit or advice on what my next step would be will be very much appreciated.
Regards
Stevie
and wish to further my knowledge in all aspects of electronics repairs.
I have a few LED TV's to repair, I am currently working on the following unit.
Sony Model KD49X8005C
SMPS Board <> 1-980-310-11
Main Board <> 1-894-595-12
White Sticker Sony (GL6) APS-395 4-574-565-01
White Sticker APS-395(CH) 147463311-1511M000532
When plugged in, the standby light is white for around 10 seconds, then fades to nothing.
There are no signs of life on the screen, just a black screen.
There is no sound from speakers.
The optical output on the main board turns red for around 8 seconds.
I have taken the following readings from the SMPS, and a few from the MAIN Logic board.
I would appreciate if someone could please point me in the right direction, as to what voltages I should be getting,
or where I should try testing next.
I can supply any pictures needed to assist further.
No Sound
No Backlight (unless tested with LED Tester),
Tried Hard Reset, Got Green Indicator light, No Difference.
Tried Firmware update. No Difference.
Any assistance in trying to fix this unit or advice on what my next step would be will be very much appreciated.
Regards
Stevie
Connector CN6401
2- DC-Dimmer--------- 0.0v_______1- NC------------------- NC
4- PWM-Dimmer------- 0.0v_______3- BL-ON--------------- 0.0v Pin 7
6- Blinking------------- 0.0v_______5- STBY-3.3v----------- 3.49v
8- BL-ERR-------------- 2.386v_____7- AC-OFF-DET--------- 3.49v pin 3
10- GND--------------- GND_______9- Power-ON------------ 3.481v
12- GND--------------- GND_______11- GND---------------- GND
14- REG 12v----------- 12.87v_____13- REG-12v----------- 12.87v
16- REG 12v----------- 12.87v_____15- REG-12v----------- 12.87v
18- REG 12v----------- 12.87v_____17- REG-12v----------- 12.87v
20- GND--------------- GND_______19- GND---------------- GND
22- GND--------------- GND_______21- GND---------------- GND
24- T-Con-ON--------- 0.0v_______23- GND---------------- GND
26- T-C0n-VCC-12v--- 0.0v_______25- T-Con-VCC-12v---- 0.0v
28- T-Con-VCC-12v--- 0.0v_______27- T-Con-VCC-12v---- 0.0v
Connector CN6801
+ LED = 95.46v Ground to Chassis
- LED = 14.98v Ground to Chassis
Backlights were tested via LED Backlight tester connected to unplugged CN6801 at 96V, All bulbs seem to light correctly.
Here are some of the voltages I measured from the SMPS Board.
SMPS Board__________SMPS Board_________SMPS Board
(Chassis GND)________(Chassis GND)_______(Chassis GND)
D6201 = 3.493v_______R6806 = 0.0v_______C6408 = 12.67v
D6202 = 3.493v_______R6807 = 12.87v_____C6409 = 12.67v
D6401 = 12.87v_______R6420 = 12.87v
D6402 = 12.87v_______R6421 = 12.97v
D6801 = 95.50v_______R6419 = 0.0v
D6802 = 95.50v_______R6410 = 12.87v
D6803 = 95.50v_______R6804 = 95.40v
D6804 = 95.50v_______R6809 = 0.0v
D6805 = 95.40v_______R6207 = 3.491v
D6806 = 95.40v
D6814 = 15.06v
Here are some of the voltages I measured from the MAIN Logic Board.
Main Board___________Main Board____________Main Board
IC9003 (D9D320)______IC7702 (00GA3W)______IC9001 (D9D320)
Pin1 = 3.468v_________Pin1 = 3.325v_________Pin1 = 3.453v
Pin2 = 0.775v_________Pin2 = 0.800v_________Pin2 = 0.0029v
Pin3 = 5.290v_________Pin3 = 0.0v___________Pin3 = 5.259v
Pin4 = 2.512v_________Pin4 = 0.0v___________Pin4 = 2.509v
Pin5 = 0.0v___________Pin5 = 5.00v__________Pin5 = 0.0015v
Pin6 = 3.402v_________Pin6 = 0.0v___________Pin6 = 5.004v
Pin7 = 8.260v_________Pin7 = 0.0v___________Pin7 = 9.909v
Pin8 = 12.840v________Pin8 = 5.01v__________Pin8 = 12.799v
(Chassis GND)________(Chassis GND)_________(Chassis GND)
As I said any assistance in trying to fix this unit or advice on what my next step would be will be very much appreciated.
Regards
Stevie
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