ARMY TM 9-1240-379-34
MARINE CORPS TM 04332A-34
2-1. TROUBLESHOOTING INFORMATION. (cont)
Table 2-1. TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
TANK PERISCOPE (ALL MODELS)
1. LOSS OF BORESIGHT.
Step 1.
Make sure elevation and deflection knob assemblies are fully engaged with
their positive clutches.
If knob cannot be engaged, replace appropriate knob assembly.
assembly.)
assembly is properly seated.
a.
Check for foreign matter around locating pads. Clean as
necessary.
b.
Check for damaged periscope latches or strikes. Replace
authorized parts (page 2-16, 2-27, or 2-39) as necessary.
c.
If boresight capabilities are not restored, replace daylight body
assembly, infrared body assembly, or elbow assembly (Page
2-8), as appropriate.
DAYLIGHT BODY ASSEMBLY
2. POOR OR NO ILLUMINATION OF RETICLE.
Step 1. Check for damaged or defective incandescent lamp (page 2-16).
Replace damaged or defective incandescent lamp (page 2-16).
2-2
