1 Test set 1-199.
1 Electric Light
a n d rectifier stacks are free of dust,
3-4 Visual Inspection
d i r t , and corrosion.
a. C a r e f u l l y i n s p e c t t h e c i r c u i t e l e m e n t s i n
Remove each plug-in unit and in-
spect the plugs and the jacks' from
s h o o t the equipment. In many cases, the cause
w h i c h each unit has been disconnect-
of the trouble is a broken wire, overheated
WI. See that the contacts are clean
and that no parts are damaged.
faults can often be observed during a visual
See that all fastenings are secure.
check, complex troubleshooting techniques
b. I f t h e c a u s e o f t r o u b l e c a n n o t b e v i s -
u a l l y detected, it is then necessary to use the
f o r evidence of physical damage.
( 1 ) Look for damaged insulation on the
w i r e s and see that all soldered joints
3-5. Troubleshooting Chart
a r e secure.
See that the power plug is securely
The chart below is based on the opera-
a t t a c h e d and that the prongs are not
tional portion of the quarterly maintenance
with Multimeter TS-352/U, using the appro-
No ac power.
Check the input ac voltage at the
No output at any output
ac power source, using the
terminal of terminal
Blown ac input fuse F2.
F2 if it is open.
Check to see that the prongs of
Faulty ac plug P3.
P3 are not broken or bent.
Replace the plug if defective.
Faulty ac power cord.
cord. Replace the ac power
cord if defective
Check for secure connections.
Defective ac power
Resolder loose or broken
Blown or missing dc
Cheek continuity of fuse F1.
output fuse F1.
Replace if open.
Perform the checks outlined in
unit is not repairable,
replace with a good one.