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Check as noted below if there is anything wrong.
If the trouble cannot be correct, call the dealer.
Symptom
Power switch does not turn on.
Output voltage is zero or low.
Output is excessive.
Output is not steady.
TROUBLESHOOTING
Check
1. Power lamp not lit.
2. Short bar coming off.
3. Overvoltage protection worked.
1. Short bar coming off
2. Constant-voltage/current
not switch.
3. Ammeter deflects with output off.
4. Oscillating
1. Short bar coming off.
2. Output voltage/current do not fall.
1. Short bar coming off.
2. Input voltage wrong.
3. Oscillating
4. Sensing termnal floating.
5. Strong magnetic/electric fields near-
by.
6. Other
Power cord disconnected or connected
defectively.
Input switch defective.
Input fuse blown.
Rear-panel short bar disconnected or
loose.
Voltage set too low.
Short bar installed defectively.
lamps do
Circuit defective.
Output diode broken.
Oscillation by remote sensing.
Short bars © - ©
Power
transistor
defective.
Short bar installed defectively.
Out of the rated input voltage range.
Oscillation by special load.
Prop,er connection of sensing terminal.
Keep away from oscillation sources.
Cause
and © - ®
come off.
or
control
circuit
25
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