MODIFICATIONS
UL WarningAbout Jumpers
CAUTION! These modi-We recommend solid (non-stranded) wire,
fication instructions are26�28 gauge (wire-wrapping variety). When in-
for use by qualified per-stalling jumpers, do not run their ends through
sonnel only. To avoidholes in the circuit board. Rather, solder them flat
electric shock, do not perform any servicing against the desired pad (the flat silver area, possi-
other than changing the fuse unless youbly with a hole in the middle). Make sure the ends
are qualified to do so. Refer all servicingof these flat wires do not extend beyond the pad.
and modifying to qualified personnel.
1604-VLZ PRO Post-EQ Mod
Mackie Disclaimer
This changes AUX SENDS 1 and 2, with the
Any modification of any Mackie Designs prod-pre switch engaged, to receive their signals post-EQ
uct must be performed by a competent electronicinstead of pre-EQ. The signal remains post-low cut,
technician. Mackie Designs accepts no responsi-pre-mute and pre-fader. With the pre switch disen-
bility for any damages or injuries caused by anygaged (up), the signals are not affected by the mod.
modification, regardless of the source of the modi- The following must be performed for each channel
fication instructions or the qualifications of theyou wish to modify:
technician performing them. In the case of such1. Remove all cords, including the power cable,
damages, Mackie Designs may declare warrantyfrom the 1604-VLZ PRO.
2. Place the mixer upside-down on a dry, non-privileges void. BE CAREFUL!
marring surface.
Ch. 16Ch. 15
3. If you have converted your mixer to the rack-
mount position or have installed a RotoPod,
undo those changes and temporarily configure
the mixer in the original desktop mode. You do
not have to install the pod, just get it out of the
way of the bottom cover.
4. Remove the screws that attach the bottom
cover. Keep track of what screws go where.
CUT
Remove the bottom cover.HERE
5. Cut the conductor at point C, between the
5square and round pads. Be careful to cut all
the way through the conductor, and do no cut
any nearby traces. Each channel is slightly
different, but this graphic shows Channel 16,
which is very different from the others, and
Channel 15 (respectively), which is similiar to
the remaining channels.
6. Add a jumper from the square pad at point B
to the square pad at point C.
7. Repeat for each channel you wish to modify.JUMPERS
HERE
8. Check your work very carefully, them put the
6bottom cover back the way you found it.
YouOre done!
Jumper
BEFORE
Holes
AFTERSolder
28 |
ACEC
