Shakmat Modular Aeolus Mixer, Building Manual, Page: 12 / 13

www.shakmat.com
•
11/11
-12V
OUT2
OUT1
OUT4
OUT3
Re-assemble the two PCB
together, mount the front panel and
secure it with the twenty-two nuts.
7. Front panel and nuts
Plug in the power cable and make sure the red side of
the ribbon cabble matches the -12V on the PCB, then
plug the module in your system and test it.
Send an audio signal into the input 1 of the first
quadraphonic input section. Check every output (1, 2, 3,
4, Center & Sum), which should all outputs the same
signal as the input 1 (with the same amplitude except
for the Center output which has a gain reduction). If
outputs 1 and 2 are quieter, the module must be in 5.1
mode, simply toggle the 5.1 switch.
Now, let’s test the other input sections. As every input
section has a normalisation, you simply need to send a
signal into the input 1 (or L for the stereo sections) and
test outputs 1, 2, 3 and 4. When testing the second stereo section, mind the
cross switch position which causes the L input to go to outputs 1 & 4 (instead
of 1 & 3) and the R input to go to outputs 2 & 3 (instead of 2 & 4). To test the
switch function you'll need to send two different signals into the L and R
inputs.
If the module does is silent at any outputs, check the power cable, the power
header solder pin and the electrolytic capacitors orientation and solder joints.
For any problem related to a specific input or output, recheck the correspon-
ding jack socket solder pins plus the PCB to PCB headers solder pin close to
it. For any problem related to a switch function, recheck the switch solder pins
plus the PCB to PCB headers solder pin close to it.
8. Power & basic testing
Jack nuts (x22)