In article ,
Jim Lesurf wrote:
In article , Dave Plowman (News)
wrote:
Had a quick look today. There are two stereo effects amps which appear
the same - both with accessible connectors to their PCBs. Unplug the
one marked rear and the amp stays on. Plug it back in and unplug the
other and it trips.

Well that may offer two easy 'solutions'.

One is to simply use it with the duff board out of circuit. :-)

That is one way. ;-)

The other is to compare voltages, etc, between the two to help find the
fault - if you can keep the thing working for long enough without the
protection making this impossible! :-)

I've downloaded a PDF of the service manual for $8. The offending power
amps are strange (to me) in that they have 3 HT rails. +/- 35v for most
and +60v for the output pair.

But at least no surface mount stuff and common components so I'll have a
go at fixing it.

Slainte,

Jim

--
*If you're not part of the solution, you're part of the precipitate *

Dave Plowman London SW
To e-mail, change noise into sound.