CR1604-VLZ Source Mod

UL Warning

CAUTION! These modi-

fication instructions are

for use by qualified per- sonnel only. To avoid

electric shock, do not perform any servicing other than changing the fuse unless you are qualified to do so. Refer all servicing and modifying to qualified personnel.

Mackie Disclaimer

Any modification of any Mackie Designs prod- uct must be performed by a competent electronic technician. Mackie Designs accepts no responsi- bility for any damages or injuries caused by any modification, regardless of the source of the modi- fication instructions or the qualifications of the technician performing them. In the case of such damages, Mackie Designs may declare warranty privileges void. BE CAREFUL!

About Jumpers

We recommend solid (non-stranded) wire, 26–28 gauge (wire-wrapping variety). When in- stalling jumpers, do not run their ends through holes in the circuit board. Rather, solder them flat against the desired pad (the flat silver area, possi- bly with a hole in the middle). Make sure the ends of these flat wires do not extend beyond the pad.

Jumper

BEFORE

Holes

AFTER Solder

jumpers

here

This changes the C-R/PHONES level control in the SOURCE matrix to receive the main mix stereo signal pre-MAIN L-R MIX fader instead of post-MAIN L-R MIX fader.

You can accomplish the same result that this modification provides by using two standard 1⁄4" tip-sleeve “jumper cables” plugged into the MAIN INSERT (L and R) to the first click and the other end plugged into STEREO AUX RETURN 4, assigned to C-R/PHNS ONLY. STEREO AUX RETURN 4 level will control the volume as well as C-R/PHONES level control.

You can also use the TAPE INPUT (L and R) RCA jacks (you will need 1⁄4" to RCA cables or adapters) and assign the TAPE source button in the SOURCE matrix.

1.Remove all cords, including the power cable, from the CR1604-VLZ.

2.Place the mixer upside-down on a dry, non- marring surface.

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. Remove the bottom cover.

5.Cut the conductor at points ZL and ZR, between the square and round pads. Be careful to cut all the way through the conduc- tor, and do no cut any nearby traces.

6.Add a jumper from the square pad at point YL to the square pad at point ZL and another from the square pad at point YR to the square pad at point ZR.

7.Check your work very carefully, then put the bottom cover back the way you found it. You’re done!