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Page Title:
Table 6-1 Test Set Troubleshooting |
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 TM 11-6625-3023-14/ET904-AA/MMA-010/E154 TS3684/TO 33A1-12-1173-1
Fault indication
Probable cause
Corrective action
1. Test set is
a. POWER switch off.
a. Turn POWER
inoperative.
switch on.
b. Blown fuse.
b. Replace fuse (F1).
c.
Diode rectifier(s)
c.
Replace diode
D1 and/or D2.
rectifier(s)
d. Power cord and/or
d. Replace power cord
plug open.
e. No 115 VAC power,
e. Check AC power
f.
Power switch S1
f.
Replace power
opens
switch (para 6-9).
2. Fuse (F1) blows
a. Transformer T1 has
a. Replace trans-
when changed.
short or open
former T1
winding,
b. Diode rectifier D1
b. Replace diode
or D2 shorted.
rectifier
c.
Filter capacitor C1
c.
Replace Filter
or C2 shorted
capacitor
3. AC POWER on
a. AC POWER switch off.
a. Turn AC POWER
lamp does not
switch on.
light
b. Blown fuses
b. Replace fuse (F1).
c.
AC POWER on switch.
c.
Replace AC POWER
on switch
4. TEST indicator
a. Indicator bulb
a. Replace indicator
does not light.
defective.
bulb (para 5-6).
b. Defective
b. Replace lampholder
lampholder.
6-2
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