Pioneer A-22

ubergeeknz

Member
2018-08-31 12:32 pm
Does anyone have a service manual/schematics? I'm interested to see what the topology is like exactly.

I've acquired one, and it's all working after a bit of contact cleaner, but it runs very cool, ie. the heatsink and outputs still cold after 20-30 minutes and I can't find any bias adjustment. I haven't hooked it up to the analyser yet.

It appears to be a regular class AB BJT from around '85. Relatively simple internally, quite a bit of empty space.

IMG_20200209_212704.jpg IMG_20200209_223209.jpg