Kole Audio Amp

[Perry Babin]

Can you post a photo of the board?

[mike49504]

Perry,

Ill get a pic up on here in a few.

Next thing is i got the amp to produce audio out of both channels.

But if i flip the crossover switch from full to low pass or high pass the amp wont produce audio on the right channel.

The switch has to be in full range mode in order to get audio out of both channels.

So i sparyed contact cleaner in it and went back and fourth with the switch 200+ times i still have the same issue Bad switch or maybe something else??

I checked all op-amps all test fine.

Any thoughts?

[Perry Babin]

The switch should be similar to the one in the photo. Use your meter to confirm that you have approximately 0 ohms between the contacts that are connected by the blue line in each position.

[mike49504]

Ok I have 0 ohms between the pins.

[Perry Babin]

Do all op-amps have +/- supply voltage?

Do any op-amps have any significant DC offset on the output pins?

[mike49504]

All op-amps

1:-0.72
2:-0.72
3:-0.72
4:-16.05
5:-0.72
6:-0.72
7:-0.72
8:14.75

[Perry Babin]

Are there any other switches?

If so, set the crossover switch so that there is no output and move the other switches to see if the audio plays through intermittently.

[mike49504]

If o push or twist the transformer i can get output but very low

[Perry Babin]

I don't think is has anything to do with the transformers if it plays on one of the crossover settings.

If all else fails, you'll have to trace the signal through the op-amps to see where the signal is lost.