Hello. I have the sanyo DP55360A set with a bad main board. I believe I have isolated the issue to the audio amp, but cannot be for sure. I acquired a schematic for the television from this site but cannot figure out which component is bad? The schematic suggests that the power failure circuit is activating. The diode in the circuit that pertains to the audio_pow does not put out the required 13v. If anyone has any insight or experience with these sets it would be greatly appreciated!
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Re: Sanyo N8TE Main board
It is not really that the diode "puts out" a voltage, but the low voltage (which the circuit senses) is causing it to pull down the protect signal.
This is a common issue with this model and here is a video on how it is fixed:
https://www.youtube.com/watch?v=KSYCn93pz6kPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search. -
Re: Sanyo N8TE Main board
Superb find sir! That specific IC on my board is not damaged. Also the board in this set is not as well labeled (or my eyes have failed me) and does not show the audio power test point. I'll get that IC replaced and see where that leads me. Thanks for the knowledge!Comment
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Re: Sanyo N8TE Main board
I removed the diode on the protection circuit for the audio amp. Speakers won't work but the TV has a digital out for my receiver. Anyone have any suggestions on a replacement amp? Seems like if I replace the IC it will just go bad again. This set is a refurb after all and I can only assume that the board was replaced for the same issue.Comment
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Re: Sanyo N8TE Main board
Well the IC could go bad but it will probably last. Component failure is a probability function, a chance, some survive 20 years others die in 5 years.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: Sanyo N8TE Main board
Worked wonderfully. Will be keeping volume at 0 forever.Comment
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Re: Sanyo N8TE Main board
What diode did you actually remove? I have the same problem....Comment
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Hi and thanks in advance for any input you might provide!
I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO
Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this... -
Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"... -
ONN 100012588
Issue: No Power, Then Rebooting After Main Board Change
Short answer: replace main board and power board
Technical answer: replace main board and Q306 & Q307 on power board.
Long answer:
TV wouldn't turn on. Power switch was fine which means the main board isn't processing the power on signal. Replaced main board. TV turns on now but randomly reboots. Bad main board? EEPROM? Tried to pull main board and got a shock touching the corner of the board. That's weird. C334 (450V 10uf) capacitor is still holding a high charge.... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
I suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
Obviously the same LVDS connector for the screen connection...
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