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Figure 5-3. Battery charger component locations, bottom of chassis.		Up
TM-11-6130-381-14 Charger Battery PP-4127B/U Manual		Next
Figure 5-4. Waveforms, troubleshooting at direct support.



TM 11-6130-381-14
Item
Trouble
Checks and corrective
No.
symptom
measures
Probable trouble
Check switch and replace if defective
Defective RESET (A) or RESET (B)
Appropriate indicator light dose  not
2
switch .
illuminate as required.
a. Check meter and replace if
CHARGE ON indicator light
a. Meter is defective.
3
defective.
illuminates but TEST METER (A)
b. Check waveform at junction o f
b. Defective diodes CR6001 through
or TEST METER (B) does not
R6001 and R6002 (A, fig. 5-4) if
CR6004.
indicate charging currant .
waveform is not obtained, check
diodes replace if defective.
c. Check waveform (B fig. 5-4) at
c . Defective diode CR6006, or
L6001-1 or L6002-3, and at gate
CR6007, or rectifiers Q6001 and
terminals of Q6001 and Q6002
Q6002 (battery A) or Q6003 and
(battery A) (C, fig. 5-4), or Q6003
Q6004 (battery B).
and Q6004 (battery B). If waveform
i s not obtained, check diodes
CR6006 or cR6007, rectifiers Q6001
through Q6004 or inductors L6001
and L6003. Replace if defective.
d. Replace circuit board. If problem
d. Control circuit card assembly.
is corrected, send defective board to
next higher level of maintenance for
repair.
with
e. Check
in  accordance
mountad
e. Defective
chassis
resistor.
paragraph 5-5.
5-5

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