TM-9-1240-401-34-P
TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
JULY 1993
TM-9-1240-401-34-P - Page 245 of 590
TM 9-1240-401-34&P
5.1-10. DIRECT SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
LOCATION
CORRECTIVE ACTION
LEVEL ASSEMBLY
1.
LEVEL VIALS (1) HAVE UNEVEN OR NO ILLUMINATION
WITH 24 VOLTS DC APPLIED.
Observe visually in darkened area with 24 volts DC
applied.
a.
Replace toggle switch (ref. para 5.1-14).
b.
Send to general support maintenance.
2.
LEVEL VIAL (1) HAS NO BUBBLE OR IS CRACKED.
Observe visually.
Replace level vial (ref. para 5.1-17).
COVER ASSEMBLY
3.
COUNTER DIALS (2) HAVE UNEVEN OR NO ILLUMINATION
WITH 24 VOLTS DC APPLIED.
Observe visually in darkened area.
a.
Replace overlay assembly (ref. para 5.1-16).
b.
Replace electrical wiring or contacts (ref.
para 5.1-16).
Change 1
5.1-11
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