Hi everyone,
I'm trying to repair a New Zealand made Alron branded guitar amplifier, its dated 1978 on the chassis.
It has 2 MJ802 transistors as the output pair, an OC branded Folded Line reverb box, and is rated at 45 watts output.
Its giving me a bit of grief so I was hoping someone may have a circuit diagram lying around?
The fault is virtually no output at all. Maybe 100 milliwatts if lucky.
I've tried signal tracing but there are some odd circuit design techniques in it that make no sense to me yet.
The power supply is fine, +_ 40 volts, the speaker is fine, all transistors check ok with my meter, the electro caps have either been replaced or check fine.
I've never worked on an amp like this one, it uses a transformer as the phase splitter for the output transistors.
A schematic would make repair so much easier.
Thanks,
Raff