5
Main Mix Source Mod
This modification changes the SOURCE
matrix’s MAIN MIX selection to tap the ste-
reo signal before the MAIN MIX level con-
trol (
pre
) instead of after (
post
). This could be
especially handy for live work
where the engineer wants to be able to cotrol
the MAIN MIX level (sent to the house sys-
tem) without changing the level in his head-
phones. The work area is on the underside of
the circuit board, near the MAIN MIX level
control.
Caution:
This modification also causes the
meters to indicate pre MAIN MIX levels.
They will no longer indicate the signal level at
the MAIN OUTS, but rather the signal level
at the PHONES and CONTROL ROOM
outputs (when MAIN MIX SOURCE is
selected).
1. Remove all cords, including the power
cable, from the 1202-VLZ PRO.
2. Place the mixer upside-down on a dry,
non-marring surface.
3. Remove the screws that attach the bot-
tom cover. Keep track of what screws go
where. Remove the bottom cover.
4. Using a sharp “X-acto” type knife, cut the
conductor at points ‘XL’ and ‘XR’. Be
careful to cut all the way through the
conductor, and do not cut any nearby
traces.
5. Add a jumper from point ‘YL’ to the
square pad at point ‘XL’ and from point
‘YR’ to the square pad at point ‘XR’.
6. Check your work very carefully, then put
the bottom cover back the way you found
it. You’re done!
JUMPERS
HERE
CUT
HERE
