Made it to work and was taking a better look at those pics on my computer instead of my phone like I was this morning. Wow, things were a lot simpler back then. Where do you get the schematics for all that stuff? I don't remember if I mentioned it before but I tried to repair a peavey bass amp for someone before and had a hard time coming up with the right schematics. It ended up having some transistors blown but once I got it working then I found out that the speaker was bad. That's what you get when you are inexperienced with something. The stuff I work on has a lot of printed circuit boards and almost no one repairs boards any more like we did when I first started out doing this. Now it's component troubleshooting and then replace the whole board. It often times ends up to be a lot of money. Good thing we deal with mostly big companies that can afford it. A lot of this stuff would be hard for individuals to swallow.
well,
i got a big stash of schematics and parts from one of the guys i apprenticed under when he retired.Nowadays, a cursory glance round google can find you most of what you need quicker than going through the file cabinets.The older tube stuff was a lot more straightforward. with the old fenders,marshalls and traynors, they were meant to be serviced and last the owner a lifetime if need be.
i sort of see it as the difference of working on a 50's cadillac and a newer dodge neon - everything in the cadillac was built as robustly as they could possibly make it.the neon is a fine car but has a definite "lifespan".....
Peavey was really one of the first companies to start the modular board approach in amps - that whole build theory has since turned into a plague on quality amps where the majority of new amps are disposable and have a "replacement only" warranty.This entails the retailer exchanging a new amp of the same model to the customer, throwing the broken one in the garbage out back and applying for a credit from the manufacturer.I can't imagine troubleshooting pcb's all day - it would drive me absolutely crazy..
On alot of peavey's older stuff, the outputs fail and send dc straight to the speaker and fry it. i've got an older bandit sitting here now that's just not worth repairing - it looks great and sounded great when it was working but, ultimately, it's either gonna have a tube circuit built into its' chassis or get pitched...