I have some Zapco but nothing is labeled as reference. Photo of the board?
Do you need help with a repair or do you simply want a diagram?
Do you need help with a repair or do you simply want a diagram?
Ag series is the reference series at least the AG1000 matches my 1000 reference. I have been working on a few zapcos of my own… I have tested all fets and caps. I need schematics so I can check all the resistors to see if they are to spec. Basically I have an issue on 2 of my old amps, they can take power with no problems but they won’t turn on. My guess is it’s a resistor or something like that. I have been looking for broken traces and don’t see anything.
Answering email here.
Start with the voltages on the various ICs on the primary side of the power supply. VCMOS would be the first test point.
Start with the voltages on the various ICs on the primary side of the power supply. VCMOS would be the first test point.
When the amp isn't drawing excessive current and isn't powering up, you check voltages with B+ ground and remote connected.