Table of Contents
Advertisement
This modification is accomplished by changing R222 on the Audio Boards
from a 5.6 MI2 to a 2.7 Mil resistor, as listed in the following instructions:
1.
With power off, remove the cover, knobs, and faceplate, as shown in
Fig. 8-1 (page 8-2).
2.
Loosen pot shaft nuts on the Display Control Boards.
3.
Remove the (2) 8-32 Phillips screws on the front of the boards.
4.
Remove the 16-pin jumper and disconnect the red molex power harness.
5.
Remove the boards to an upright position.
6.
Remove the (4) 8-32 Phillips screws securing the Audio Processing
Boards to the chassis.
7.
Remove the Audio Boards.
8.
Replace R222 (5.6 Mil) on the Audio Boards with a 2.7 M11,1 % film
resistor ( see Fig. 8-2 on page 8-3).
9.
Replace all board assemblies and install lower mounting screws.
10. Lower the top boards, carefully inserting the pot shaft into the support
bracket, with nuts and washers on the outside.
11. Making sure the bushings are fully seated in the bracket, carefully
tighten the pot nuts! Too much torque will break the pots.
12. Replace the upper 8-32 mounting screws (with plastic washers).
13. Reconnect the power harness to the Audio Boards.
14. Insert the DIP jumper firmly into the Display Boards.
15. Replace the faceplate, knobs, cover, and turn on power. As a suggestion,
write down on a label the date and the new Leveling Speed setting. Post
it on the COMPELLOR's front or back panel to inform all users of your
modification.
8.3 Unlinking the Model 300 for 2-Channel Operation
As shipped from the factory, the Model 300 COMPELLOR is configured as a
STEREO product. The stereo channels are linked electronically in two ways:
1.
The leveling circuits are tied together to preserve stereo imaging.
2.
The Silence Gate Circuit is common and operates on both channels
simultaneously.
8-4 Circuit Modifications
Advertisement
Table of Contents
