On 19/04/2016 20:33, Gareth Magennis wrote:


"N_Cook" wrote in message ...

Owner acquired knowingly non-working off a friend of a friend, so no
point in asking him/them what is normal operation. Nothing about the
following test routine? in the user manual
Reported as ok for practise use but will not switch into high-power gig
mode.
I've not got inside yet to monitor power rails/ try use dummy loads etc.
Low level test signal in, the output jumps to a high level soon after
switch on, plus bargraph surge, for half a second and then drops back to
low level. Is this normal, just checking-out +/-40V to +/-90V switching
of rails is ok? If so why the bargraph jump?






Rant:

There was a time when Peavey had a large facility in Corby, UK.
If you wanted spares, you could phone them and anything you wanted would
be there in a couple of days.
It was an excellent service, one of the best.

Now the Corby Facility is closed. You have to go through a 3rd party,
Barnes & Mullins.

Ask for a pot for a particular amplifier, and you have no chance. They
have to contact Peavey USA, get a part number, then try and get it
across the pond.

Tried that, just doesn't work.
Peavey spares are now largely unobtanim, the brand is dead in the UK.



Gareth.

Just as well I never use main agents.
Got the sections out of the box to work on.
Class G PAs with only ch1 &2,signal-in from Prea according to the schema
, so whatever is causing the leap and drop back at switch on is in the
Prea. A surge to exercise the on-demand fan at switch on would make
sense , but not via increasing signal as seemingly thermal monitoring.
Will check the minor rails first and then see if the high-power sections
of the G PAs function, but at the moment I see no common section in the
PA , between ch1 and ch2 other than power rails, that could cause that,
later in actual use. Very unlikely matching components would both fail
in ch1 and ch2 PA at the same time