TM-9-2350-261-20-1 Unit Maintenance Manual Volume 1 M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-20-1 INFRARED PERISCOPE WORKS IMPROPERLY — Continued 0040 00 BY 1. Remove periscope power pack 517 lead (1) from I.R. power pack (2). 2. Measure resistance between lead ends (1) and (3) (inner and outer). 3. Does multimeter read 0 ohms both times? BYN 1. Replace I.R. periscope power pack lead. 2. Install original I.R. power pack (WP 0291 00 or WP 0293 00). 3. Verify no faults found. B2Y 1. Remove circuit plug 516 (1) and 516 A (2) from I.R. POWER switch jacks (3) and (4). 2. Measure resistance between I.R. POWER switch jacks (3) and (4) with switch ON. 3. Does multimeter read 0 ohms? B2YN 1. Replace I.R. POWER switch (WP 0241 00). 2. Install original I.R. power pack (WP 0291 00 or WP 0293 00). 3. Verify no faults found. 0040 00-3