Hi
I'm checking a PSU board for a friend (long distance) so I don't have a proper DE game to check it in. His is a TMNT and I have a LAH. So I can connect voltage inputs (CN1 & CN2) and do output checks only. So:
1) I have fixed the 5v issues and now reading 4.98v
2) 12v +&- circuit is fine giving +13.65 and -13.60v
The High Output section has been previously tampered with. Checked all components and they measure fine. Resoldered a few suspicious dry joints. Output voltages are a bit strange though.
CN5
Pin 1 Ground - Tick
Pin 2 -98VDC (I get -114.6v) Suspicious
Pin 3 -110VDC (I get -127.5v) Suspicious
Pin 4 +68VDC (I get 70v) Tick
Pin 5 +12 VDC (I get +12v) Tick
Pin 6 +5 VDC (I got +4.98v) Tick
Pin 7 key - Tick
My input voltage on CN1-9 is 117vac
So all is fine except a suspicious Pin 2 & 3. They are both about 17v too high.
As mentioned tests are being done with no load connected (no displays connected or other PCB's).
So my question is:
1) Are these too high and would possibly damage the display boards when attached? If so what is the probable cause?
or
2) Are these two voltages within range and will work fine?
Thanks
Crazi