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TABLE
5-1.
TROUBLESHOOTING
(Continued)
PROBLEM
POSSIBLE CAUSE
REMEDY
Hum through output.
1.
Ground Loop,
etc.
See Section
11,
Installation.
2.
Failure
to
unbalance
Ground "COM"
to
output transformer into
unbalanced
load
.
chassis.
3.
Mounted too close
to
Relocate unit.
strong EMI field.
4.
Power supply.
Check filter
caps.
Distortion (during
no
1.
Power supply voltage.
Repair
as
needed.
limiting mode).
2.
Input level too high.
Adjust.
3.
Defective output
amp.
Repair.
Distortion (during limiting).
1.
"Cracking" sound on
attack.
Attack
set too fast or
check Q-Bias
(^
5.3.2).
2.
Low frequency distortion.
Select slower settings
of
Attack and/or
Release controls.
VU meter reads low on
1.
Bad meter.
1.
Replace.
+4, +8 range.
2.
Switch
is in
PEAK mode.
2.
Switch
to
AVG mode.
Excess noise.
Problem
in ICl,
2, 3, 4.
Replace.
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25 -
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Table of Contents
Troubleshooting
