I know I know, it's old, but I love this amp!
I've never had a problem with this amp until now. The power turns on just fine and the sound works at first. When the amp warms up after a minute the output boards are turning off. LED's on the boards themselves. The main power is still on.
Any heads up on where I should be searching for the bad component?
I've searched the rest of the forum and have tried the few things listed but to no avail....HELP!!!! 🙂
I've never had a problem with this amp until now. The power turns on just fine and the sound works at first. When the amp warms up after a minute the output boards are turning off. LED's on the boards themselves. The main power is still on.
Any heads up on where I should be searching for the bad component?
I've searched the rest of the forum and have tried the few things listed but to no avail....HELP!!!! 🙂
I have removed and reseated several times thinking connectors were worn and loose. To no avail. Not saying that isn’t the problem but reseating doesn’t seem to help.
It is affected by that.
While powered on the bench, lifting slightly and reseating causes the output boards to turn back on....although short lived as the turn right back off.
While powered on the bench, lifting slightly and reseating causes the output boards to turn back on....although short lived as the turn right back off.
If you have repeatedly reseated them, it's not likely the problem.
Is the amp going into protect?
For the 10 pin header, check the voltage on all pins when the LEDs are on and off and post the voltages if they're changing with the LEDs. Use the numbering scheme below and copy and paste this list and fill in the blanks.
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Is the amp going into protect?
For the 10 pin header, check the voltage on all pins when the LEDs are on and off and post the voltages if they're changing with the LEDs. Use the numbering scheme below and copy and paste this list and fill in the blanks.
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Attachments
I’m not positive it’s going into protect. The led is not lighting indicating if it is. I’m away from work now and will resume testing Monday. Thanks a ton for the help thus far and I’ll post with the voltages Monday.
on/off
Pin 1: 0 / 0
Pin 2: 0 / .11
Pin 3: 13.7 / 13.7
Pin 4: 0 / 0
Pin 5: 13.10 / 13.10
Pin 6: 13.10 / 13.10
Pin 7: 13.10 / 13.10
Pin 8: 13.10 / 13.10
Pin 9: 12.90 / 12.90
Pin 10: 0 / 0
Pin 1: 0 / 0
Pin 2: 0 / .11
Pin 3: 13.7 / 13.7
Pin 4: 0 / 0
Pin 5: 13.10 / 13.10
Pin 6: 13.10 / 13.10
Pin 7: 13.10 / 13.10
Pin 8: 13.10 / 13.10
Pin 9: 12.90 / 12.90
Pin 10: 0 / 0
Confirm that the large white ceramic resistor next to Q510 is within tolerance. It may be difficult to read accurately because the value is very low.