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Page Title:
Table 3-5. DC Voltage Chart No. 3 - Condenser Leakage Test Circuits |
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 TM 9-4910-736-14&P
- Condenser Leakage Test Circuits
DC Voltage Chart No. 3
NOTE
All voltages are measured between point specified and pin E22 (instrument
ground) with DC VTVM. Battery voltage is assumed to be 12 V. All voltages
are 20%.
FUNCTION switch position:
COND
CONDENSER switch position:
LEAK
Test leads:
Shorted together
WARNING
High voltage is present in this test. DO NOT TOUCH ANY
EXPOSED COMPONENTS. Exercise extreme caution when
measuring voltage. Set instrument to OFF during inspec-
tion. For steps 3 through 7, use VTVM on 500 V scale.
Action:
Step
Action:
Test
Normal
voltage normal
voltage abnormal
voltage
point
no.
1
Q 13 In
Proceed to step 2.
Inspect copper side of printed
12 v
circuit board for open circuit
or cold solder on Q13 in
line.
2
Replace Q13.
Q 13 Out
Proceed to step 3.
7.5 v
Replace A2.
A2 + Out
Proceed to step 4.
500 v
3
Replace R18.
4
Proceed to step 5.
R18 open.
450 v
E9
450 v
Proceed to step 6.
Inspect wire between E26 and
E 26
5
E9.
6
450 v
Proceed to step 7.
Inspect wire from pin E26 to
E 25
lug 9 of section 1 rear of
CONDENSER switch S2.
a. Inspect wires leading from
E 25
0v
7
E24 and E25 to PUSH TO TEST
PUSH TO
TEST
switch S4.
b. Switch S4 defective.
switch
Replace S4.
acti-
vated
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