Speakon speaker outlets carrying output via the monitor route , via
monitor1&2 faders and mon1/mon2 rotary controls on each channel. But main
sliders per channel and 2 master sliders only control to phones output. I'm
loathe to burrow into the mixer (all those damn fittings) if its a RTFM
thing or a missing jumper lead , secret switch combination or something
silly. It was lent to someone and came back like this and no
knowledge/divulging of course

"N_Cook" wrote in message
...
Speakon speaker outlets carrying output via the monitor route , via
monitor1&2 faders and mon1/mon2 rotary controls on each channel. But main
sliders per channel and 2 master sliders only control to phones output.
I'm
loathe to burrow into the mixer (all those damn fittings) if its a RTFM
thing or a missing jumper lead , secret switch combination or something
silly. It was lent to someone and came back like this and no
knowledge/divulging of course




I'm having a little difficulty translating that, but many of these type of
units, including this one, are switchable so that it behaves either normally
as a Stereo amplifier, or can be switched to one power amp being fed a Mono
mix from the main Stereo Bus, and the other power amp running a Monitor
Send, so the act can have a Monitor on stage as well as a (Mono) PA system.


There should be a switch somewhere that does this, probably marked
Main/Monitor or something.



Gareth.

Gareth Magennis wrote in message
...

"N_Cook" wrote in message
...
Speakon speaker outlets carrying output via the monitor route , via
monitor1&2 faders and mon1/mon2 rotary controls on each channel. But
main
sliders per channel and 2 master sliders only control to phones output.
I'm
loathe to burrow into the mixer (all those damn fittings) if its a RTFM
thing or a missing jumper lead , secret switch combination or something
silly. It was lent to someone and came back like this and no
knowledge/divulging of course




I'm having a little difficulty translating that, but many of these type of
units, including this one, are switchable so that it behaves either
normally
as a Stereo amplifier, or can be switched to one power amp being fed a
Mono
mix from the main Stereo Bus, and the other power amp running a Monitor
Send, so the act can have a Monitor on stage as well as a (Mono) PA
system.


There should be a switch somewhere that does this, probably marked
Main/Monitor or something.



Gareth.




Its annoying the easily overlooked significance of the "o" and "."
distingushing mono (monophonic) from mon. (monitor), why not fold. instead
of mon. .

Looks as though its diverter switch problems on axial type 1/4 inch pcb
mount sockets. Oddly both failing at the same time , perhaps someone tripped
over leads, but even then ,both failing together seems odd.
Physically jumpering master L line-out to PA-in L, and same for the right
brought normal operation. Since plugging in jacks, Left diverter is now
working as default structure of master to PA and the other one still
erroneous.
So looks as though I can leave the mixer intact and just replace the back
board patching sockets.

Not so simple. The sw on these sockets are not used, sensing must be via the
ring contacts and analogue switches or relays .
I suspect the owner could tolerate a pair of patch leads jumpering master
outputs to PA-in

On 13/06/2012 00:40, N_Cook wrote:
Not so simple. The sw on these sockets are not used, sensing must be via the
ring contacts and analogue switches or relays .
I suspect the owner could tolerate a pair of patch leads jumpering master
outputs to PA-in




IIRC there is a model of PV pa amp which requires a short jumper lead
between two of the front panel jacks to link the two channels.

Ron

Ron Johnson wrote in message
...
On 13/06/2012 00:40, N_Cook wrote:
Not so simple. The sw on these sockets are not used, sensing must be via
the
ring contacts and analogue switches or relays .
I suspect the owner could tolerate a pair of patch leads jumpering
master
outputs to PA-in




IIRC there is a model of PV pa amp which requires a short jumper lead
between two of the front panel jacks to link the two channels.

Ron


For the moment I'm going with a bad PA-in bypass switch , so replacing both
1/4 inch sockets and bad solder on a jumper that carries signals to 3 of the
4 control lines of a MAX364 quad an. sw IC.
If its a problem involving the recessed L/R // L+R/Mon1 mode switch then it
can stay there and as owner does not use monitor outputs, he will have to
use a pair of jumpers on the rear.

"N_Cook" wrote in message
...
Ron Johnson wrote in message
...
On 13/06/2012 00:40, N_Cook wrote:
Not so simple. The sw on these sockets are not used, sensing must be
via
the
ring contacts and analogue switches or relays .
I suspect the owner could tolerate a pair of patch leads jumpering
master
outputs to PA-in




IIRC there is a model of PV pa amp which requires a short jumper lead
between two of the front panel jacks to link the two channels.

Ron


For the moment I'm going with a bad PA-in bypass switch , so replacing
both
1/4 inch sockets and bad solder on a jumper that carries signals to 3 of
the
4 control lines of a MAX364 quad an. sw IC.
If its a problem involving the recessed L/R // L+R/Mon1 mode switch then
it
can stay there and as owner does not use monitor outputs, he will have to
use a pair of jumpers on the rear.



In my experience, mixer desks are a black art in terms of use, even if you
think you understand the principles and functions of the myriad
cryptically-marked switches and signal routing options. I have spent hours
trying to get back to a situation that I knew worked ok before I pressed a
few buttons ...

A couple of weeks back, I fixed a powered mixer for one of the shops I do
work for. It was a straightforward output problem, but when I had it all
back together, try as I might, I could not get it to a state where a signal
going in on a channel, would arrive at the output sockets, controlled by the
master faders, and making the main bargraphs dance prettily. Eventually, I
gave up, and returned it to the shop owner - who can 'play' these mixer
desks like a piano - informing him that I was sure its original problem was
fixed, but that I couldn't drive it properly, and he would need to give it a
final check. He rang me a couple of hours later and said yes - it was all
ok. When I asked him what I'd done wrong, this stream of stuff that sounded
a bit like "you hadn't got the oogleflump matrix diverter routed through the
group one A / B monitor bypass fiddlety-drack osmosifying control, resulting
in all signals disappearing down the backline monitor channel's plug-hole
simulator". Oh, said I. I'll know next time then ...

Arfa

In my experience, mixer desks are a black art in terms
of use, even if you think you understand the principles
and functions of the myriad cryptically-marked switches
and signal routing options. I have spent hours trying to
get back to a situation that I knew worked ok before
I pressed a few buttons...

I'm not surprised that even an intelligent person such as yourself has had
problems setting up mixers.

Some years back I tried to get Mackie to hire me to re-do their mixer
manuals. They tended to drop the reader "in media res", without providing a
step-by-step "slow build" that explains the basic features, then shows how
they're assembled into practical mixing "solutions".