N
N_Cook
Didn't think when initially checking out, but what is the "group" slider
function,? no www user manual found.
Anyone any schematics for it ? (ps no emails to whatever this posting
apparently throughs up)
One channel clipping, then dropping out totally after a time, first problem
in preamp, imbalanced gain, second unknown pa or prea. At least possible to
swap the pa channels over it would seem , to resolve to pa or prea , if
nothing actually found.
Also what governs the fan startup, comes on at power up for 2 seconds
(presumably normal) switches off and comes on whan heated up but nothing
obviously separate from the amp/s for temp monitoring or total/channel
cutout, ie no relays, so some sort of gain control coming into play to kill
the channel.
glad to see we are not alone got similar problem,have run studiomaster
vision 8 for 12months no prob but have suspected fan not doing its
stuff. summertime is hot here so used external fan just to be
sure,However--- big prob occured running just one guitar in practice
session, unit suddenly lost digital display, developed loud squeal
from both speakers, master straight to off, peak red lights showing
max!! then nothing.
tried powering up again same result.
have carried out detailed inspection, all pcb's ok visually.ribbon
cables and pins good,transformer seems ok but I'm not sure what value
outputs I should be measuring at each pin??
would really appreiciate any help
I've not got the schematic but I've found you can run it stripped down.
Disconnect the 2 pa and all the ribbon cables except the one between the ps
one, via small rear panel and up to the mixer. To check for any mixer
problems, removing display and memory stuff, monitor output by phones.
It looks, not done so yet, that you can then plug in one amp at a time , or
swap around , to localise single channel problem to one ch or the other in
pa or mixer section.
There seems to be odd power rails , +/65V main power rails and a pair of
+/79V.
I have some monitored voltages at the pa headers, will get back to it today