Table 3-3. Direct Support Troubleshooting-continued

TM 11-6760-238-34

Table 3-3. Direct Support Troubleshooting-Continued

SYMPTOM

PROBABLE TROUBLE

CORRECTIVE ACTION

11. CRANK ENGAGED LAMP DOES NOT LIGHT (step 13), AC POWER AND DC POWER LAMPS ON

a. Defective shutter holding fixture

Refer to higher category of maintenance.

12. SENSOR CAL LAMP DS2 DOES NOT LIGHT (step 15), AC POWER AND DC POWER LAMPS ON

a. Defective SENSOR CAL lamp DS2

Replace lamp or lampholder socket (para 3-8n)

b. Defective FOCAL PLANE SHUTTER switch S8

Refer to higher category of maintenance

c. Defective CTR control R2

Replace CTR control (para 3-8r)

d. Defective SENSOR switch S9

Replace SENSOR switch (para 3-8h).

e. Defective shutter assembly test board and components assembly A8

Replace shutter assembly test board and components assembly A8 (para 3-8b).

f. Defective bridge assembly A10

Replace bridge assembly

13. SENSOR CAL LAMP DS2 DOES NOT LIGHT (step 16), AC POWER AND DC POWER LAMPS ON.

a. Defective SENSOR CAL lamp DS2

Replace lamp or lampholder socket (para 3-8n)

b. Defective FOCAL PLANE SHUTTER switch S8

Refer to higher category of maintenance

c. Defective AFT control R3

Replace AFT control (para 3-8r).

d. Defective SENSOR switch S9

Replace SENSOR switch (para 3-8h).

e. Defective shutter assembly test board and components assembly A8

Replace shutter assembly test board and components assembly A8 (para 3-8b)

f. Defective bridge assembly A 10

Replace bridge assembly A 10

14. OPER LAMP A9DS4 DOES NOT LIGHT (step 19), DC POWER LAMPS ON

a. Defective OPER lamp A9DS4 or indicator lamp assembly A9

Replace lamp or indicator lamp assembly A9 (para 3-8t).

b. Defective MASTER switch S3

Refer to higher category of maintenance

c. Defective shutter assembly test board and components assembly A8

Replace shutter assembly test board and components assembly A8 (para 3-8b)

15. RECY LAMP A9DS3 DOES NOT LIGHT(step 21); DC POWER LAMP ON

a. Defective RECY lamp A9DS3 or indicator lamp assembly A9

Replace lamp or indicator assembly (para 3-8t)

b. Defective MASTER switch S3

Refer to higher category of maintenance

c. Defective shutter assembly test board and components assembly A8

Replace shutter assembly test board and components assembly A8 (para 3-8b).

16. DATA LAMP A9DS1 DOES NOT LIGHT (step 23); DC POWER LAMPS ON.

a. Defective DATA lamp A9DS1 or indicator lamp assembly A9.

Replace lamp or umdicator assembly A9 (para 3-8t)

b. Defective MASTER switch S3.

Refer to higher category of maintenance

c. Defective shutter assembly test board and components assembly A8

Replace shutter assembly test board and components assembly A8 (para 3-8b)

17. ELECT FLASH LAMP A9DS2 DOES NOT LIGHT (step 25); DC POWER LAMPS ON

a. Defective ELECT FLASH lamp A9DS2 or indicator lamp assembly A9

Replace lamp or indicator assembly A9 (para 3-8t)

b. Defective MASTER switch S3

Refer to higher category of maintenance.

c. Defective shutter assembly test board and components assembly A8

Replace shutter assembly test board and components assembly A8 (para 3-8b)

18. 90 LAMPS A5DS3 AND A5DS4 DO NOT LIGHT (step 27); DC POWER LAMPS ON

a. Defective 900 lamp A5DS3 and A5DS4 or indicator lamp assembly A5.

Replace lamps or indicator assembly A5 (para 3-8t)

b. Defective MASTER switch S3

Refer to higher category of maintenance

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