So I've done a lot of searching trying to figure this one out. I've replaced the usual faulty components on this board.
I've repaired a few of these boards already but never had this issue.
There's no 5v Stby or PS_ON voltage.
There's no voltage at ICP801.
I figure the standby circuit comes from the rectified circuit supplied through the resisters and diodes. Then goes to some Zener diodes and transistors to diode DM832, where the voltage output stops.
From there the circuit goes down to the optocouplers.
I swapped ICP801 and a few other bits and pieces with no change.
What I have done is bypassed the relay to force the TV on, which turns the TV on no problem. After that the TV will happily run, the standby circuit will operate fine, but once the TV is unplugged and the board discharges, the 5v standby doesn't return.
Could someone please point me into a direction of what to test next.
The board comes from a Samsung 64E8000 TV.
Thanks
I've repaired a few of these boards already but never had this issue.
There's no 5v Stby or PS_ON voltage.
There's no voltage at ICP801.
I figure the standby circuit comes from the rectified circuit supplied through the resisters and diodes. Then goes to some Zener diodes and transistors to diode DM832, where the voltage output stops.
From there the circuit goes down to the optocouplers.
I swapped ICP801 and a few other bits and pieces with no change.
What I have done is bypassed the relay to force the TV on, which turns the TV on no problem. After that the TV will happily run, the standby circuit will operate fine, but once the TV is unplugged and the board discharges, the 5v standby doesn't return.
Could someone please point me into a direction of what to test next.
The board comes from a Samsung 64E8000 TV.
Thanks
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