ARMY TM 9-1290-262-24&P
MARINE CORPS TM 00476C-24&P
AIR FORCE TO 49A7-3-72/74
Table 4-1. GENERAL SUPPORT TROUBLESHOOTING (cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2. PARALLAX PRESENT IN OPTICAL SYSTEM.
Check objective cell assembly adjustment.
Adjust objective cell assembly. Refer to page 4-12.
3. TELESCOPE RETICLE HAS POOR DEFINITION.
Step 1. Check setting of eyepiece assembly focus.
Adjust eyepiece assembly focus. Refer to page 4-16.
Step 2. Inspect eyepiece assembly for defects.
Repair eyepiece assembly. Refer to page 4-5.
Step 3. Check reticle assembly for incorrect installation.
Install reticle assembly correctly. Refer to page 4-5.
4. IMAGE IS POORLY DEFINED.
Step 1. Check for faulty objective cell assembly lenses.
Repair objective cell assembly. Refer to page 4-12.
Step 2. Check eyepiece assembly focus.
Adjust eyepiece assembly focus. Refer to page 4-16.
Step 3. Check optical cell assembly for parallax.
Adjust optical cell assembly. Refer to page 4-16.
Step 4. Check optical instrument prism for defects.
Replace optical instrument prism. Refer to page 4-5.
Step 5. Recheck image definition.
If image is still poorly defined, replace M2A2 aiming circle.
