Recent content by cudajim

I used to work at Pacific Stereo. The Calibre line was actually a step-up from the Concept line. Concept was the cheap version, I worked on many of them.

Ok, so I dove in again and the relay was going on & off every minute or so. I first nailed it down to the bad channel then looked at the driver xistor. It checked ok with a VOM so I hit it with freeze spray which caused it to work. I then hit it with the heat gun (slightly) and it crapped out...

Today I fired up the amp and the relay did contact. I had audio (fm) in both channels but one channel was not good (lots of static). I measured the offset voltage at the relay. 30 mv and 800 mv on the bad channel. Where to go next?

And I thought we were a dying breed.

I'll measure it soon,(probably tomorrow), will get back to you. Thanks.

I'm trying to fix an old Pioneer 650 amp. It's on my test bench and it crapped out just yesterday. The output relay won't engage. I get audio signal all the way to the relay and if I jump it I get good sound, both channels. The relay itself picks with an external supply. I suspect the...

I just found this forum cause I am trying to fix an old Pioneer receiver. I'll throw up the problem in another forum. Anyhow, I've been away from fixing amps for 20 years or so, thought I might jump back in again. I'll need lots of help.