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I am seeking a circuit or service manual for a LA40A450C1DXXY

I need a service manual or main PCB Circuit for a Samsung LCD TV Model LA40A450C1DXXY as I am a retired TV & Video Tech trying to fix my sons TV I have been told that the main board (part BN94-02127B)is no longer available in Australia and is not supported by the USA for parts or ic's etc the problem is a vertical red Chroma bar aprox thirty five inches wide from the left side however the tv will work with extra heat sinks and a fan on the main board I have already changed all caps in the PSU inverter etc and am trying to either replace the main PCB or isolate the shorted SMT and replace it but I need a circuit or complete service manual with CRO wave forms etc can you help?

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  • Contributor
  • 4 Answers

We tried to turn on tv and it will not show a picture or sound can you tell me what is wrong with it

Posted on Jul 10, 2013

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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bestdarngood
  • 3037 Answers

SOURCE: sharp lc26sh20u 26"flat panel has vertical lines on left side,What coulb be problem?

This line would either indicate a horizontal problem cropping up or a power supply problem

I would suggest getting a service tech to look at it to determine where your problem is coming from but most likely it will be the power supply /deflection board that is the problem but I can't know for sure, it will have to be checked.

A lot of sets have had damages after a long hot summer a/c flipping off and on and current demand being peeked from the utilities storms or quick power loss off and on can cause problems like this to occur

Please let me know if you have any other questions, thanks

Posted on May 14, 2008

jerryg50
  • 1667 Answers

SOURCE: Plasma TV

Your set is servicable with proper troubleshooting. Normaly, the defective boards are swapped out to service these sets. This fault can be in the address decoder, or the display drive boards. It is also possible that the failure is in the display assembly itself.

My preference would be to give the set to the authorised service rep to have an estimate to deterine if the set is worth to service.

Jerry G.

Posted on Jul 16, 2008

  • 21 Answers

SOURCE: NM2168(020731) 14" TV. Vertical circuit

The spark that you saw was probably caused by a cold solder ..remove the old solder,clean the pcb make sure that the track is still ok..if there is a break its ok to jump it with no.22 AWG solid copper wire.Some tv version gets the 24vdc supply for the vertical circuit from the flyback transformer.Also check the vertical IC for cold solders ..hope your problem is confined to cold solders only..good luck

Posted on Dec 30, 2010

eagle338
  • 4889 Answers

SOURCE: right side of samsung ln52a580p

This is not an issue with the main board . Its a clear case of faulty LCD controller board or the LCD panel itself is faulty(most likely). I suppose the sound is not affected?

Posted on Feb 15, 2011

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A samsung fridge RF4287HARS has error codes 40E, 21E and 22E


Hello Jerry Fuller,

All your codes point to the same circuit pack.
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(PCB = Printed circuit board)


CALL...
If you have any questions or comments relating to Samsung products,
55 STANDISH COURT MISSISSAUGA,
ONTARIO L5R 4B2 CANADA

Please contact the SAMSUNG customer care center.
SAMSUNG ELECTRONICS CANADA, INC.
TEL : 905-542-3535 FAX : 905-542-3835
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www.samsung.com/ca


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1 Answer

Hi - We have an error code on a Canon Model 2800 : E000001-0002 Any ideas on how to fix the problem? Thanks! Paul


E001
0000 The main thermistor detects 250°C or higher.
0001 The main thermistor or the sub thermistor detects overheating (hardware
circuit detection).
0002 The sub thermistor detects about 295°C or higher.
Main cause The fixing film unit is faulty (i.e., the thermistor has a short circuit). The
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Caution To clear the error, execute the following in service move:
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Action
1. Fixing film unit
Check the interval between pin 1 and pin 2 and between pin 3 and pin 4 of
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YES: The thermistor has a short circuit. Replace the fixing film unit.
REF.
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Try replacing the main power supply PCB. Is the problem corrected?
YES: End.
NO: Replace the DC controller PCB.


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Need a services manual with codes and fixes


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1 Answer

Samsung le32r black screen


Hi.

Your problem sounds like inverter has failed.
To prove this you need to remove the back from your tv set.
Then switch it on and look carefully through the small holes on the metal shielding that is directly over back of screen you are looking for bright white light.
If you cant see it easily try doing again but in A dark room.
If you can see white light through the holes in metal shielding the inverter is working & fault is else where.
If no light can be seen problem is with inverter you will need to remove the inverter pcb & check the transformers with ohm meter to see if one is open circuit. Allso look on same pcb for any smd circuit protectors that may be open circuit.

http://dysonmanuals.llc.nu/

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