Table 5-4. Troubleshooting - Continued

TM 9-4931-378-13&P

Table 5-4. Troubleshooting - Continued

Malfunction

Test or Inspection

Corrective Action

Step 2. Check switch S12.

Replace switch S12.

43. VOLTAGE BETWEEN TP11 AND TP12 NOT -14.80 VDC TO -15.20 VDC WITH S12 IN LAI -15V.

Step 1. Adjust PS2 -15 Vdc in accordance with Chapter 6.

Step 2. Replace power supply PS2.

44. NO VOLTAGE BETWEEN TP13 AND TP12 WITH S12 IN EPU 28V.

Step 1. Perform continuity check of wiring to S12. (See paragraph 5-14 and figure FO-1.)

Repair wiring as necessary.

Step 2. Check switch S12.

Replace switch S12.

45. NO VOLTAGE BETWEEN TP14 AND TP12 WITH S12 IN EPU 28V.

Step 1. Perform continuity check of wiring to S12 and S13. (See paragraph 5-14 and figure FO-1.)

Repair wiring as necessary.

Step 2. Check switch S12.

Replace switch S12.

Step 3. Check switch S13.

Replace switch S13.

46. VOLTAGE BETWEEN TP14 AND TP12 NOT O VDC WITH S12 SET T0 EPU 28V AND S13 PRESSED.

Step 1. Check switch S13.

Replace switch S13.

47. NO VOLTAGE BETWEEN TP14 AND TP12 WITH S12 IN LAI +15V.

Step 1. Perform continuity check of wiring to S12 and S14. (See paragraph 5-14 and figure FO-1.)

Repair wiring as necessary.

Step 2. Check switch S12.

Replace switch S12.

Step 3. Check switch S14.

Replace switch S14.

48. VOLTAGE BETWEEN TP14 AND TP12 NOT 0 VDC WITH S12 IN LAI +15V AND S14 PRESSED.

Step 1. Check switch S14.

Replace switch S14.

49. NO VOLTAGE BETWEEN TP14 AND TP12 WITH S12 IN LAI -15V.

Step 1. Perform continuity check of wiring to S12 and S15. (See paragraph 5-14 and figure FO-1.)

Repair wiring as necessary.

Step 2. Check switch S12.

Replace switch S12.

Step 3. Check switch S15.

Replace switch S15.

50. VOLTAGE BETWEEN TP14 AND TP15 NOT 0 VDC WITH S12 IN LAI -15V AND S15 PRESSED.

Step 1. Check switch S15.

Replace switch S15.

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