Table 5-1. Troubleshooting

TM 5-6675-329-13 & P

Table 5-1. Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Blurred image is seen through the eyepiece.

None (lens internal to the telescope housing is broken).

Automatic level NA2-80 must be replaced.

Automatic Level NA2-80 is wobbly on the Tripod GST-40 base.

Check Tripod GST-40 Central Fixing Screw and Central

Fixing Screw Retainer.

Replace defective part(s).

Focus Drive does not continuously drive focusing lens.

Check Focus Drive Assembly (item 1, Figure 5-3) for

defects.

Replace defective component.

Horizontal Drive does not drive Automatic Level NA2.

Check Horizontal Drive Components (Figure 5-4) for

defects.

Replace defective component(s).

Section III: MAINTENANCE PROCEDURES

5-5

GENERAL

Maintenance procedures in this section include removal, cleaning, inspection and installation of the eyepiece,

Objective Housing, Focus Drive, Horizontal Drive Components and Tripod GST-40 assemblies. All maintenance

procedures can be performed by one maintenance technician.

5-6

EYEPIECE ASSEMBLY MAINTENANCE INSTRUCTIONS (Figure 5-1)

This task covers:

Removal

Cleaning

Inspection

Installation

Initial Setup

Applicable Configuration

5-2