Sanyo p50747-04 shuts off after a few seconds, but has pic...

[football0062]

strange issue ive been trying to chase here, the Z board had a bad cap and blown 1amp pico fuse on the 15v line. replaced and now i get the screen to come on shows 03 in corner but still shuts back off in few seconds. ive downloaded the SM for it and it talks about the power failure circuit, but on the board i have i can only find 1 IC there talking about.

the strange thing is that when it comes on i do get display, showing channel 3 in the top right corner.

ive done the logic board test pattern and its perfect as well. i know that part is separate from the main board but was ruling things out.

i attached the SM maybe someone can pick up on something im missing?

[football0062]

Re: Sanyo p50747-04 shuts off after a few seconds, but has pic...

Anyone have any idea? Would just buy a new board but they are not readily available

[tom66]

Re: Sanyo p50747-04 shuts off after a few seconds, but has pic...

Can you check the Vs voltage while it runs and just as it cuts off?
Also, check that the power button is not stuck.

[football0062]

Re: Sanyo p50747-04 shuts off after a few seconds, but has pic...

Yes vs is fine. I have all my voltages. Screen pattern is perfect from logic board and will stay on for test so i know its the main board. I disconnected power button board after turn on and it still does the same... service manual says to check power failure circuit but cant locate but one IC in the circuit. IC 1610. Cant locate ic1620, 1630 or 1640. The service manual is in the attachment in my first post with layout of board in there also front and back