T O 35C2-3-442-2
b. Tag and disconnect wires of harness
2. False Fault Indication Cannot Be
(19) from components.
(a) Remove P12 and check for
P12 for the circuit showing false indication.
Avoid breathing fumes generated by
Open circuit should be indicated.
tection is required.
(b) If circuit is open, remove,
c. Exercise care not to apply excessive
repair or replace the fault indicator box.
heat when unsoldering components.
d. Remove relay (22) by removing
screw (20) and lockwasher (21).
b . Removal. To remove the fault loca-
ting indicator box (located adjacent to con-
trol cubicle), disconnect plug P12 from the
Clean all components with a clean
receptacle connector (J12) in the rear wall
lint-free cloth moistened in an approved
of the box, then remove the four screws
cleaning solvent and dry thoroughly.
securing the box to the rear housing.
Connect the fault locator to test
1. Inspect harness wiring for defec-
tive insulation and continuity.
perform test specified in procedural analy-
2. Inspect harness connector for
damaged threads; bent, loose or missing
pins and for shorts.
b. Electrical Components.
cator box schematic. Refer to this
schematic when checking individual
1. Check electrical components for
components for their required values
or operating characteristics.
2. Check diodes for forward and
reverse values. Measured from anode (+)
to cathode (-) value should be low. Reverse
fault locating indicator box in the order of
leads, value should be infinity.
index numbers assigned. Pay particular
attention to the following:
Printed Circuit Board.
1. Inspect printed circuit boards
(component side) for damage, burns, dis-
Disassemble the fault locating indi-
colored areas, and signs of overheating.
cator box only to the extent neces-
sary to accomplish repair.
2. Inspect components for security.
a. Remove cover (2) by removing
3. Inspect circuits of printed circuit
boards for breaks and damage.