Mackie 1202-VLZ Pro Reference Manual page 7

This modification changes AUX SEND 1 (in
post mode) and AUX SEND 2 to receive signal
regardless of the channel's MUTE/ALT 3–4
switch position, but still be post-fader . In order
to convert the entire mixer, it must be done
on each channel, and is slightly more involved
for the stereo channels 7–14. The work area is
on the underside of the circuit board, near the
channel MUTE/ALT 3–4 switches.
1. Remove all cords, including the power
cable, from the 1402-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.
JUMPERS
6
HERE
CUT
4
HERE
JUMPERS
HERE
CUT
HERE
4. Using a sharp "X-acto" type knife, cut the
conductor at point 'C' (channels 1–6) or
the conductors at points 'CL' and 'CR'
(channels 7–14). Be careful to cut all the
way through the conductor, and do not
cut any nearby traces.
5. Locate the 12 pins that comprise the
underside of each MUTE/ALT 3–4 switch.
6. Add jumpers as shown on the illustration
below—they're not specifically marked on
the circuit board itself, so be careful.
7. Repeat for all channels.
8. Check your work very carefully, then put
the bottom cover back the way you found
it. You're done!
JUMPERS
6
HERE
CUT
4
HERE
JUMPERS
6
HERE
CUT
4
HERE
7
JUMPERS
6
HERE
CUT
4
HERE
6
4