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820-3115-B no power
- Thread starter Sr. Robot
- Start date
Remove Q7035 and check again.
So you have short to ground at pin 21/U7000?
Then change Q7035 and U7000.
I also recommend to change Q7030 at same time.
Be sure R/C7025 are both good.
Do not resolder F7040, until get correct voltage at C7040.
Then change Q7035 and U7000.
I also recommend to change Q7030 at same time.
Be sure R/C7025 are both good.
Do not resolder F7040, until get correct voltage at C7040.
Post U7000 voltage; pins 1, 2, 3, 9, 12, 13, 14, 15, 17, 19, 20, 27.
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Sorry, I forgot to type pin 1 above...
Change Q7085...
Post R7020 voltage.
C7040 voltage now?
Check all solders/traces for U7000 and surrounding components.
Be sure R7012 is good.
Don't forget the R/C networks connected to pins 5, 7, 8.
Be sure R7012 is good.
Don't forget the R/C networks connected to pins 5, 7, 8.
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Get donor board and replace all components in R/C networks from pins 5, 7, 8.
I suppose you cannot properly test the caps...
I suppose you cannot properly test the caps...