TM- 9-4910-663-34
Table 2-5. TROUBLESHOOTING (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
If open circuit indication is obtained, proceed to step 10; if normal indication is obtained, proceed
directly to step 12.
Step 10. Using ohmmeter, check for 1.14 ohm ±5% indication between REGULATOR B-binding post and-
terminal 20 of load bank.
If open circuit indication is obtained, replace load bank element.
Step 11. Using ohmmeter, check for continuity across terminals of LOAD SELECTION 25 AMPS/12.5 AMPS
switch S23 with switch set to ON position.
Replace switch S23 if open indication is obtained.
Step 12. Set LOAD SELECTION 25 AMPS/12.5 AMPS switch S23 to OFF position. Set DC AMMETER
LOAD & STARTER OUTPUT CURRENT BATTERY CHARGE CURRENT RANGE switch S14 to
LOAD X3 position. Set LOAD SELECTION 50 AMPS/25 AMPS switch S22 to ON position. With
circuit breaker switch CB1 set to ON position, check for 0.57 ohm ±5% indication between
REGULATOR B± and REGULATOR B-bending posts, using ohmmeter.
If resistance indication is not as specified, proceed to step 13; if resistance indication is normal,
proceed to step 18.
Step 13. Set LOAD SELECTION 50 AMPS/25 AMPS switch S22 to OFF position. Using ohmmeter, check
for 1.14 ohm ±5% indication between REGULATOR B-binding post and each of terminals 17 and 18
of load bank.
If either resistance indication is not as specified, replace load bank element.
Step 14. Using ohmmeter, check for continuity across each set of contacts of LOAD SELECTION 50
AMPS/25 AMPS switch S22 with switch set to ON position.
Replace switch S22 if open indication is obtained for either or both sets of contacts.
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