sickrick wrote:
Hey all,

I have a small (but major) problem with my Philips 7871 receiver. The
treble pot only controls the right channel. The left channel is stuck
on 0 dB: when i turn the pot, there is no change in the sound. The
pot works fine with the right channel and the bass pot works fine
with both channels. I have a feeling I need to buy a multimeter, but
its been many years since I used one and I've completely forgotten
how to use it. I also am looking for a service/repair manual for
this, but I can't find one. I took off the casing and looked around
for any visual clues, but everything looks fine inside. A few
questions:

Is there anything else I should look for?

Anyone here have experience repairing this particular piece of
equipment?

If I bought a multimeter, how would I go about troubleshooting this
problem?

How much would it cost to repair this problem if I took it to a tech

Any idea where I could find a service/repair manual?

Please help!!!

Thanks
Rick

I found the schematic for this set. There is a high cut filter switch which
if failing, could be affecting the high end. Also, there is a small 1uF
capacitor, C233, that may be affecting the frequency response.

It should be fairly simple for an experienced technician to compare the left
channel to the right and figure out where the problem is.

Good luck.
--
David Farber
David Farber's Service Center
L.A., CA