 |
|||
|
|
|||
|
Page Title:
Table 4-1. Troubleshooting Chart-continued |
|
||
| ||||||||||
|
|
 TM 55-4920-325-14&P
Table 4-1. Troubleshooting Chart-continued
Corrective action
Malfunction
Probable cause
2-continued
INDICATOR (6)
pointers.
a. Check and replace
a. Open potentiometer
3. When measuring
R109 or R108.
as required. (Re-
fer to paragraph
pointers of
4-10.)
b. Open secondary wind-
b. Check for ac volt-
INDICATOR (6)
ing of bridge trans-
age across T101-
always drive fully
former T101.
3 and T101-4 and
clockwise.
across T101-1
and T101-5. If
either is open,
replace trans-
former T101.
(Refer to para-
graph 4-11.)
c. With power off,
c. Open within capaci-
tance indicator.
use VOM and
check for
10,000 ohms
500 ohms
across P101-B
and P101-C.
NOTE
If corrective action is
required for steps 1
through 3, check cal-
bration of CAPACI-
TANCE INDICATOR
(see paragraph 2-6 f).
a. If power ON indi-
a. Loss of input power
4. CAPACITANCE
(115 volts, 400 Hz)
INDICATOR (6,
cator DS101 (3,
figure 2-1) is
to capacitance
figure 2-1) is
indicator DSC686.
inoperative.
lighted, check
for 115 volts,
400 Hz across
P101-H (high)
and P101-G
(low).
b. Use VTVM and
b. Loss of ac signal input
to capacitance
check for ac
indicator DSC686.
voltage across
P101-K (high)
and ground. If
no voltage is
present, check
test set switching
circuits. (Refer
to paragraph
4-5b.)
4-8
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals