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Page Title:
Table 6-1 Test Set Troubleshooting-continued |
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 TM 11-6625-3023-14/ET904-AA/MMA-010/E154 TS3684/TO 33A1-12-1173-1
Table 6-1. Test Set Troubleshooting - Continued
Fault indication
Probable cause
Corrective action
5. 280 VAC not
a. Transformer T1
a. Replace trans-
present across
primary or second-
former T1
test points B
ary winding open.
indicator lamp
and D. Power
b. Broken wire.
b. Check wiring for
L1 lights.
6. +770 VDC (5%)
a. Diode rectifier D1
a. Replace diode
not present
or D2 open.
rectifier D1 or
across test
D2 (para 6-21).
points C and A.
b. Filter capacitor C1
b. Replace filter
or C2 open.
capacitor C1 or
C2 (para 6-20).
c.
Broken wire,
c.
Check wiring for
7. +770 VDC (5%)
not present
across test
points H and A.
a.
Switch S4 in
a. Resistor R2 open
a. Replace resistor
BULK position
(no voltage at test
R2 (para 6-14).
(switches
point H for all
S2 and 53 not
three positions of
pressed).
S4).
b.
Switch S4 in
b. Switch S4 open in
b. Replace switch S4
EXTERNAL
EXTERNAL position.
position
(switches S2
and S3 not
pressed).
c.
Switch S4 in
c.
Resistor R3 open.
c.
Replace resistor
COAX position
R3 (para 6-14).
(switches S2
and S3 not
d. Broken wire.
d. Check wiring for
pressed).
6-3
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