Table 5-4. Troubleshooting - Continued

TM 9-4931-378-13&P

Table 5-4. Troubleshooting - Continued

Malfunction

Test or Inspection

Corrective Action

AND S18 IN EVERY POSITION.

59. NO VOLTAGE BETWEEN TP9 AND TP10 WITH S11 IN

SIG circuit between P1 and S18. (See paragraph 5-14 and figure

Step 1. Perform continuity check of UB

Repair wiring as necessary.

SIG circuit between P1 and J3. (See paragraph 5-14 and figure FO-1.)

Step 2. Perform continuity check of

FO-1.)

Repair wiring as necessary.

Step 3. Check switch S18.

Replace switch S18.

Step 4. Replace CCA 1A3.

KN.

60. NO VOLTAGE BETWEEN TP9 AND TP10 ATONE OR MORE POSITIONS OF S18 WITH S11 IN

Step 1. Perform continuity check of relevant circuits between P1 and S18. (See paragraph 5-14 and figure FO-1.)

Repair wiring as necessary.

Step 2. Replace CCA 1A3.

61. NO VOLTAGE BETWEEN TP9 AND TP10 WITH S11 IN RDR ALT AND S7 IN EVERY POSITION.

Step 1. Perform continuity check of UB RDR SIG circuit between P1 and S7. (See paragraph 5-14 and

Repair wiring as necessary.

Step 2. Check switch S7.

Replace switch S7.

Step 3. Replace CCA 1A3.

62. NO VOLTAGE BETWEEN TP9 AND TP10 AT ONE OR MORE POSITIONS OF S7 AND S11 IN RDR ALT.

Step 1. Perform continuity check of relevant circuits between P1 and S7. (See paragraph 5-14 and figure

Repair wiring as necessary.

Step 2. Replace CCA 1A3.

63. WAVEFORM NO. 1, FIGURE 5-13, NOT PRESENT AT TP1 AND TP4.

Step 1. Replace CCA 1A2.

64. WAVEFORM NO. 2, FIGURE 5-13, NOT PRESENT AT TP1 AND TP4.

Step 1. Confirm waveform missing or wrong.

Step 2. Replace CCA 1A2.

65. PARITY FLR LAMP NOT ILLUMINATED DURING CCA 1A2 FUNCTIONAL CHECK WITH S8 IN STAT 2.

Step 1. Confirm lamp not illuminated.

Step 2. Replace CCA 1A2.

5-32