Mackie 1202 VLZ Owner's Manual page 27

2. PRE-MUTE MOD
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 (GAIN
knob). In order to convert the entire mixer, it
must be done on each channel. It is slightly
more involved for the stereo channels 5
through 12. 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 MS1202-VLZ.
2. Place the mixer upside-down on a dry,
non-marring surface.
3. Remove the screws that attach the bottom
cover. Keep track of what screws go where.
Remove the bottom cover.
6
jumper
here
4
cut
here
4
cut
here
4. Using a sharp "X-acto" type knife, cut the
conductor at point 'C' (channels 1–4) or
the conductors at points 'CL' and 'CR'
(channels 5–12). 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 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!
Channels 1–4
Channels 5–12
6
4
jumper
cut
here
here
4
cut
here
#2: Pre-Mute Mod
6
jumper
here
4
cut
here
6
4
jumper
here
cut
here
4
cut
here
4
cut
here
27