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6 Power unit alarm
Power unit alarm display.
Refer to the section on INSPECTION OF POWER UNIT for further
details of the alarm.
7 Fin overheating
Protection is provided when an overcurrent flows to the
circuitry and the fin mounted on transistors overheats.
8 Motor overload
Protection is provided when motor is overloaded and it
overheats.
REMEDIES FOR ALARMS
1) LVAL
Measure the AC
voltage of the amplifier terminal block
using a multimeter or synchroscope.
Rating:
(2) When there is nothing unusual with the voltage, the trouble
may be an instantaneous power failure.
Check the AC
and AC 200V wiring connections.
2)
(1) Check using a multimeter whether the power transistors have
been damaged.
Disconnect the wires and measure across the
collector and emitter of the transistors.
When nothing is
wrong,
the resistance is at infinity.
