8.
TROUBLESHOOTING
P r o b l e m
Indicators or Areas to check
C a u s e
power supply w i l l
not go on.
Power ON lamp does not light
up.
*poor connection of
power cord, or broken
wire
*Bad power switch
*Fuse meltdown
No output voltage. Voltmeter does not move.
* Circuit malfunction
No output current. Ammeter does not move. * Circuit malfunction
Excessively large
output.
Output voltmeter and ammeter
readings do not decrease.
*Bad power trasistor or
control mechanism
* C i r c u i t malfunction
Unstable output.
Input voltage i s wrong.
Machine i s vibrating.
Strong magnetic or
e l e c t r i c a l f i e l d nearby.
* Operating outside the
rated voltage range
* 0 s c i 1 l a t i o n s due to
s p e c i a l l o a d type
*Remove from source
of oscillations.
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