Is the service manual for the Pioneer SA-7600 still available?

Question

Yesterday, I found an old SA-7600 amplifier in my parents' attic—a real relic, as you might say. I connected the speakers, but there's a problem: There's constant crackling, and occasionally, one channel disappears, sometimes returning when I adjust the volume or balance knob. It looks like it works, but there must be something wrong with the contacts. Is it beyond repair, or can it be revived? Has anyone else encountered this issue? Does anyone have instructions on how to fix it?

Mareck · Answer

I collect and buy retro equipment like this. Can we make a deal? In 90% of cases, however, it's not a breakdown, but rather oxidized potentiometers (volume, balance, and tone) and dirty tape/source switches. Over time, dust accumulates inside, causing the contact to &#34;float,&#34; so the channel disappears and reappears when you turn the knobs. I recently found a user manual for Pioneer SA-7600. You can take a look at it. It shows where to access the controls. Carefully clean the contacts with a contact cleaner without dismantling the boards. If that doesn't help, let me know. I regularly repair such devices and would be happy to buy it from you.