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6. TROUBLES AND PHENOMENA
Phenomenon
Check point
Trouble cause
Power is not turned
on even if the POWER
switch is thrown.
(LED on the front
panel does not go
on.)
Poor contact or
breakage of the power cable
Blowout of the fuse
＊
Poor contact or breakage
of he power cable
Blowout of the fuse
＊
POWER switch is defective.
＊
Too high AC voltage is
input.
No voltage is output.
Voltmeter does not shake.
＊
Circuit is defective.
No current is output.
Ammeter does not shake.
＊
Circuit is defective.
Excessive output is
yielded.
Output voltage or current
does not lower.
＊
Power transistors are
defective or uncontrollable.
＊
Circuit is defective.
Output is unstable.
Difference of the input
Voltage Oscillation Intense
magnetic or electric field
near the PA-B unit
＊
Input voltage is out of the
rating range.
＊
Oscillation due to a
special load.
＊
Move the PA-B unit from
the oscillation source.
If the trouble is caused by blowout of the input fuse, replace it with a
fuse of the specified rating. Disconnect the power cable before
replacing the fuse.
If the trouble seems to be caused by defects of the internal circuit,
contact our distributor.
WARNING
Never remove the case. Entrust our distributor with repair services
requiring removal of the case.
