PLAN B analog blog

It sounds to me like there is no power being applied to the module. 
Not trying to sound like a smart ass, but that's what it seems is
happening.  

The Atten. output will do it's job whether the module is under power
or not.  It's a passive attenuator that uses the ground from the
patchcord connected to it as it's reference.  If you're not getting
any output out of the A, B or A+B jacks, then either the module isn't
powered up or correctly connected to the power (cable reversed).

It could be a crappy power cable however - please try it with another.
 Another option is to check to see if the IC's have shaken loose from
their sockets.

The block diagram on the Model 9 page gives you a real good overview
of it's operation.  Check it out from the EAR site. Bascially, there
are five input channels which can be mixed and routed out of two
independent outputs busses, A and B.  The Ch. Routing swtich
determines which of those two it goes to by thowing it up (Ch. A) or
down (Ch. B). Please note - if the routing switch is set to the
middle, it kills the output from both the A or B busses, but not the
atten. outputs. 

There then is a third output A+B, which sums the information coming
form those two busses to one output.

Along with the mixing capabilities, each of the four main input
channels has it's own send output, which takes the level off the
attenuation pot and throws it out a jack/

There are three PCBs on a Model 9.  One gets the input signals and
passes those to the main (middle board).  That main board does two
things:  1) It sums the five inputs to three different output busses
(A, B and A+B), and 2) it takes the signal straight off each channel's
attenuation pot and sends that to the third board, which holds the
four Atten. Output jacks and the B Buss output jack. 

The fact that you're getting signal out the the Atten Outs proves the
inputs are traveling from the first board, to the main board and then
to the third board.  If those are working, then all the cables are
inserted correctly and operational. That leaves only the main power
connector and the problem yu're seeing seems suspect this may be it.

Just double checked with Analogue Haven who verified that they do test
each module either when it's received, before it's put into their
stock or at the time of shipment to the customer.  


Once you've had a chance to troubleshoot this, please give us an update.

hope this helps,

- P



- P




--- In PLAN_B_analog_blog@yahoogroups.com, Ancient Eyeball Recipe
<implode7@...> wrote:
>
> > Really trying out this module for the first time tonight, and I�m
not sure
> > about how the routing works � assuming user error at first, rather
than module
> > error....
> > 
> > I have a signal plugged into ch. 1 input. This will play out the
ch 1 output.
> > However, what I can�t figure out is how to route it to the A or B bus.
> > Shouldn�t the signal be passed there if I have the switch of
channel 1 set to
> > A? But I�m getting nothing out the channel A or A + B output jack
doing this.
> > Similarly, if I try the B bus....
> > 
> > Am I misunderstanding how this is supposed to work?
>