Current Sensing Calibration; Output Filter Calibration - Crown CE-4000 Service Manual

130485-1 Rev. B
Transition
Figure 4.19 Underlap
(Greater than 10V)
Transition
Figure 4.20 Excessive Overlap
(No Smooth Transition)

4.7.3 Current Sensing Calibration

Drive and test one channel at a time.
1. Connect output to 8 Ohms load and apply 1kHz
Sinewave input signal.
2. Adjust output gain level until output voltage
measures 40Vrms on one channel.
3. Adjust R160 while observing TP-10 for channel
1 in order to achieve 1.0Vrms +/-10mVrms (see
Figure 4.21).
4. Repeat the adjustment on R260 while observing
TP-245 for channel 2.
©2002 Crown Audio, Inc.
10V
Figure 4.21 Current Sensing Calibration

4.7.4 Output Filter Calibration

Output Filter Calibration is NOT fi eld adjustable and
should not need adjustment. If you suspect the
slugs ( L101, L102 for Channel 1 while L201 and
L201 for Channel 2) have been moved, the amplifi er
should be sent to CROWN Factory Service for proper
adjustment.
10V
CE 4000 Service Manual
Maintenance 4-11