Mackie 1402 VLZ Owner's Manual page 28

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. 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 MS1402-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.
5
jumpers
here
cut
here
4
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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!
Channels 1–6
5
jumpers
here
cut
here
4
Channels 7–14
5
jumpers
here
cut
here
4
5
jumpers
here
cut
here
4
5
jumpers
here
cut
here
4