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TROUBLESHOOTING
The following table lists the main causes of abnormal operation and the corrective measures required, as well as the
protective circuit operation in each case.
Indicator display
Probable cause
Protective circuit operation
CLIP indicator lights.
PROTECTION
indicator
lights.
12
There is a short at a speaker
terminal, amplifier terminal,
or wire.
The amplifier load is exces-
sive.
The heat sink temperature
has exceeded 100°C.
A DC voltage of +/-2У ог
greater was generated in the
power amplifier's output
circuit.
Locate and correct the cause
of the short.
Use a speaker system with
an impedance of at least 4
ohms (stereo) or 8 ohms
(monaural),
|
Check Ше amplifier ventila-
tion conditions and take ap-
propriate measures to im-
prove airflow around the
amplifier.
Consult your dealer or
nearest Yamaha service cen-
ter.
The PC limiter circuit oper-
ates to protect the power
transistors.
| Same as above.
The thermal protection cir-
cuit operates to protect the
power transistors.
The relay operates to protect
the speaker system.
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