Table 5-4. Troubleshooting - Continued

TM 9-4931-378-13&P

Table 5-4. Troubleshooting - Continued

Malfunction

Test or Inspection

Corrective Action

Step 5. Check switch S5.

Replace switch S5.

Step 6. Perform continuity checks of wiring around S5. (See paragraph 5-14 and figure FO-1.)

Repair wiring as necessary.

Step 7. Replace CCA 1A1.

Step 8. Replace CCA 1A2.

30. LAMPS DS1 THROUGH DS11 ILLUMINATED, DS13 NOT ILLUMINATED WITH S5 IN SELF TEST.

Step 1. Check lamp DS13.

Replace lamp DS13.

Step 2. Perform continuity check of dc input power lines to XDS13. (See paragraph 5-14 and figure, F0-1.)

Repair wiring as necessary.

Step 3. Perform continuity check of wiring between XDS13 and P3. (See paragraph 5-14 and figure F0-1.)

Repair wiring as necessary.

Step 4. Replace CCA 1A1.

31. LAMP DS13 ILLUMINATED, LAMPS DSI THROUGH DS11 NOT ILLUMINATED WITH S5 IN SELF TEST.

Step 1. Perform continuity check of dc input power lines to XDSI 1. (See paragraph 5-14 and figure F0-1.)

Repair wiring as necessary.

Step 2. Check lamps DS1 through DS11.

Replace lamps.

Step 3. Replace CCA 1A1.

32. LAMP DS13 ILLUMINATED, ONE OR MORE LAMPS DS1 THROUGH DS11 NOT ILLUMINATED WITH

S5 IN SELF TEST.

Step 1. Check lamps that fail to illuminate.

Replace lamps.

Step 2. Perform continuity check between lamp sockets and P3. (See paragraph 5-14 and figure FO-1.)

Repair wiring as necessary.

Step 3. Replace CCA 1A1.

33. VOLTAGE BETWEEN TP9 AND TP10 NOT 108 VAC TO 122 VAC WITH S11 IN 115 VAC.

Step 1. Check 115 Vac bench power.

Correct as necessary.

34. VOLTAGE BETWEEN TP9 AND TP10 NOT 24 VDC TO 32 VDC WITH S11 IN 28 VDC.

Step 1. Check 28 Vdc bench power.

Correct as necessary.

35. NO VOLTAGE BETWEEN TP9 AND TP10 WITH S11 IN +10V.

SET S17 TO OUT FWD. Confirm +6 Vdc present between TP9 and TP10.

Step 1. Set S11 to

If present, replace CCA 1 A3; if not, proceed to step 2.

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