TM 9-4910-663-34
Table 2-5. TROUBLESHOOTING (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
21.
FIELD SHORTING CIRCUIT
a.
FIELD SHORTING SWITCH INOPERATIVE OR OPERATES ERRATICALLY DURING TESTS OF EXTERNAL
COMPONENTS.
Step 1.
Set circuit breaker switch CB1 to OFF position. Connect ohmmeter between pins D and A of GEN
connector J3. Check for zero indication when FIELD SHORTING switch S38 is held in ON position.
If open indication is obtained, replace switch S38.
22.
VOLTAGE ADJUST CIRCUIT
a.
VOLTAGE ADJ CONTROL INOPERATIVE OR OPERATES ERRATICALLY DURING TESTS OF EXTERNAL
COMPONENTS.
Step 1.
Set circuit breaker switch CB1 to OFF position. Connect ohmmeter between pins B and D of BAT
connector J6. Check to see that resistance indication varies from 0 to 100 ohms ±10% when
VOLTAGE ADJ control R37 is rotated over its entire range.
If resistance indication is not as specified, replace VOLTAGE ADJ potentiometer R37.
Section IV. GENERAL MAINTENANCE
2-9.
GENERAL. This section provides instructions for lubrication to be performed by direct support personnel(See fig
2-1).
2-10.
LUBRICATION OF VARIDRIVE. For lubrication of the varidrive refer to para 3-3.c.(2) and 3-3.c.(3) of TM 9-
4910-663-12.
Change 1 2-60
