TM-9-1240-400-34-P

TELESCOPE; PANORAMIC: M115, ELBOW: M139, MOUNT: M138 AND M137

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1993

TM-9-1240-400-34-P - Page 100 of 344

TM 9-1240-400-34&P

3-6.

TROUBLESHOOTING PROCEDURES (CONT).

Table 3-2.

GENERAL SUPPORT TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

M139 ELBOW TELESCOPE

1.

M139 ELBOW TELESCOPE (1) IS NOT COLLIMATED.

Check on test fixture.

Collimate.

Refer to page 3-24.

2.

M139 ELBOW TELESCOPE (1) HAS MOISTURE OR FOREIGN MATTER.

Observe visually.

a.

Purge.

Refer to TM 750-116.

b.

Disassemble, clean, and reassemble.

Refer to page 3-7.

3-4

3-4