Mackie CR1604 Modifications - Page 10

1604-VLZ PRO Source Mod This changes the CTL ROOM/PHONES level control in the SOURCE matrix to receive the main mix stereo signal pre-MAIN MIX fader instead of post-MAIN 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 CTL ROOM/ 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 1604-VLZ PRO. 2. Undo the PHONES nut. 3. Place the mixer upside-down on a dry, non-marring surface. 4. 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. 5. Remove the screws that attach the bottom cover. Keep track of what screws go where. Remove the bottom cover. 6. Move the PHONES board to one side so you can get to points YL and YR marked on the board. 7. Cut the conductor at points ZL and ZR, between the square and round pads. Be careful to cut all the way through the conductor, and do no cut any nearby traces. 8. 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. 9. Check your work very carefully, then put the Phono board and nut, and bottom cover back the way you found them. You're done! JUMPERS HERE 8 CUT HERE 7 10