DIYbanter - View Single Post - newbie

(Patrik) wrote in message om...
snip

Personally I would test the output power transistors first since they
often are responsible in power amps failure. This usually shows up
with dc on output, or as in your case, a protection relay that doesn't
click.

/Patrik

thanks for your replies, gentlemen.

i agree - i'm assuming the ac fuse blowing is due to shorted o/p
transistors.
i guess i'm keen to find out what i can isolate from the circuit
without endangering other components.

- is it _usually_ safe to power up the driver stage without powering
the o/p stages?
- is it ok to power the o/p stage without powering up the driver
stage?
- is it safe to power anything with all of the o/p power transistors
removed from the circuit?

once again, many thanks
ant