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KLH R3100 stereo receiver volume won't adjust
- Thread starter bbullsj
- Start date
The two encoder channels end on the left two nodes out of 5 (solder lumps).
What's directly on the other side of the board?
What's directly on the other side of the board?
Looks like the microcontroller read/write pins 16 and 17.
What's on the other side of here near the vol encoder?
What's on the other side of here near the vol encoder?
No help there.
I'd be looking at opamp 4558 which I think is this
8 pin component.
Check power on pins 4(+) and 8 (gnd).
Outputs pins 1 and 7, can be checked with an audio probe or amplified speaker with an isolator cap of about .1uf. (Google audio probe) The input can be checked similarly with an audio input fed to the receiver.
One input side is pin 2 (neg)and 3(pos) and the other input is 5,6, The signal input (whether neg or pos) depends on circuit design.
Try googling testing op-amps
I'd be looking at opamp 4558 which I think is this
8 pin component.Check power on pins 4(+) and 8 (gnd).
Outputs pins 1 and 7, can be checked with an audio probe or amplified speaker with an isolator cap of about .1uf. (Google audio probe) The input can be checked similarly with an audio input fed to the receiver.
One input side is pin 2 (neg)and 3(pos) and the other input is 5,6, The signal input (whether neg or pos) depends on circuit design.
Try googling testing op-amps
Last edited:
Under $1 plus shipping costs.
Perhaps someone local.
I like to post ads on craigslist or freecycle that say "free for parts or repair" Usually it's gone within a few hours.
It's nice to see things get recycled/reused rather than going to the landfill.
...And even more to find these ads so I can get free stuff to fix.
