Troubleshooting Chart - Lambda LJS-10-V Series Instruction Manual

Symptom
6.
10.
I
12.
10
Same as 5, voltage across
A2-2 to -S is correct,
no-waveform between
A1-6 to -S.
. Same as 6, waveform
A1-6 to -S is correct,
no-waveform between
collector of Q14 and -S.
. Same as 7, waveform
between collector of (914
and -S is correct, no-waveform
between anode of CR51 and
-S.
. Output DC voltage is too
low.
R2 is very hot under full
load.
Defective current limiting.
DC output unregulated.
TROUBLE SHOOTING CHART
Possible Cause
Defective A1, A2.
Defective Q14, Q15.
Defective Q14, Q15.
Defective Q2 thru Q5.
Defective CR45.
Defective CR11 thru CR14.
Defective CR44.
Defective A4, A5.
Defective A4.
Remedy
Check and replace as necessary.
Check and replace as necessary.
Check and replace as necessary.
Check and replace as necessary.
Check and replace as necessary.
Check and replace as necessary.
Replace as required.
IM-LJS-10-V