Information subject to change
96-8006123_11-03-2021
8302 OPERATOR’S MANUAL – SECTION 8
30
8
Troubleshooting
8.1
Introduction & Precautions
This section provides a set of procedures for
identifying and correcting problems with the 8302
amplifier. Rather than providing an exhaustive and
detailed list of troubleshooting specifications, this
section aims to provide a set of shortcuts intended
to get an inoperative amplifier back in service as
quickly as possible.
The procedures outlined in this section are direct
-
ed toward an experienced electronic technician;
it assumes that the technician has knowledge of
typical electronic repair and test procedures.
8.2 No Signal
Missing output signal may be caused by one of the
following:
1.
The Control Configuration DIP switch (#7) is set
to the Follower (down) position. The amplifier
should only be configured for Follower operation
if it is in a multi-amplifier system; otherwise this
DIP switch should be set to the Master (up) posi
-
tion. See the
Advanced Configuration
section
in this manual for more information.
2.
A signal source is not connected to either in
-
puts on the amplifier. See the
Amplifier Setup
section in this manual for more information.
8.3 No LEDs Illuminated
If none of the LEDs on the Display Panel are il
-
luminated, check the following:
1. The AC mains are not connected or not on
(see the
Amplifier Setup
section for more
information).
8.4
Over/Under Line LED Lit
The amplifier will protect itself from AC mains
voltage that is 10% above or below the voltage
indicated on the back panel. This can occur if the
amplifier’s back-panel breaker is not in the on posi
-
tion (right), or if the AC supply into the amplifier is
higher or lower than the operable range.
First, check to make sure the amplifier’s back-
panel breaker is turned on. Next, check the voltage
level of the AC supply. If the AC mains voltage is
more than 10% outside the range of the operating
voltage, increase or reduce the AC mains voltage
to the proper level. When the line voltage condition
is corrected, the amplifier will automatically return
to Run mode. If the amplifier does not reset, the
amplifier’s internal transformers may need to be
replaced. Please see the
Factory Service
infor-
mation at the end of this section.
8.5 Run/Standby LED Remains Amber
When the Run/Standby LED is lit solid amber, the
amplifier is in Standby mode. Press the Power
switch to the ON position to place the amplifier in
Run mode.
If the amplifier does not return to run mode, check
to see if the High/Low Line, Overtemp, or Fault
LEDs are lit, and then follow the instructions in
this section for remedying the fault condition and
returning the amplifier to Run mode.
If the remedies given fail to restart the amplifier,
the amplifier may require servicing. See the Fac
-
tory Service Information at the end of this section.
8.6
Amplifier Overheats (Over Temp
Fault Condition)
There are two possible reasons why the 8302
amplifier is overheating: Excessive power require
-
ments or inadequate airflow.
8.6.1 Excessive Power Requirements
An amplifier will overheat if the required power ex
-
ceeds the amplifier’s capabilities. High duty cycles
and low-impedance loads are especially prone to
cause overheating. To see if excess power require
-
ments are causing overheating, check the follow
-
ing:
1.
The application’s power requirements fall
within the specifications of the amplifier. See
the amplifier’s Datasheet to verify operating
parameters.
2.
Faulty output connections and load.
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