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10. TROUBLESHOOTING
Check as noted below if there is anything wrong.
If the trouble cannot be correct, call the dealer.
Sympton
Check
Cause
Power switch does
not turn on.
＊
Power lamp not lit.
＊
Short bar coming off.
＊
Overvoltage protection
worked.
＊
Power cord disconnected or
connected defectively.
＊
Input switch defective.
＊
Input fuse blown.
＊
Rear-panel short bar
disconnected or loose.
＊
Voltage set too low.
Output voltage is zero
or low.
＊
Short bar coming off.
＊
Constant-voltage/current
Lamps do not switch.
＊
Ammeter deflects with
output off.
＊
Oscillating
＊
Short bar installed defectively.
＊
Circuit defective.
＊
Output diode broken.
＊
Oscillation by remote sensing.
Output is excessive.
＊
Short bar coming off.
＊
Output voltage/current
do not fall.
＊
Short bars 1 – 2 and 6 – 7 come
off.
＊
Power transistor or control
circuit defective.
Output is not steady.
＊
Short bar coming off.
＊
Input voltage wrong.
＊
Oscillating
＊
Sensing terminal
floating.
＊
Strong magnetic/electric
fields near-by.
＊
Other
＊
Short bar installed defectively.
＊
Out of the rated input voltage
range.
＊
Oscillation by special load.
＊
Proper connection of sensing
terminal.
＊
Keep away from oscillation
sources.
