Finder Assembly Troubleshooting

TM 11-6720-239-35

operation. Use the chart ( b below) as a guide in

2-7. Finder Assembly Troubleshooting

isolating trouble.

a. General. Most of the finder assembly troubles

will be obvious and can be localized during normal

b. Finder Assembly Troubleshooting Chart.

Symptom

Probable

cause

Correction

Viewfinder image, superimposed image,

Replace broken component (para 3-9).

Broken optical component -------------

or albator image missing.

Line across image --------------------

Replace damaged component.

Cracked optical component ------------

Rangerfinder and movable mask in-

a. Broken cam lever ------------------

a. Replace cam lever (para 3-9).

operative.

b. Replace cam spring (para 3-9).

b. Broken cam spring -----------------

Rangefinder only inoperative . . . . . . . . .

. Broken cantilever, cantilever spring,

Replace broken component.

tunet, or tunet spring.

Mask assembly only inoperative -------- a. Sliding mask lever or spring broken--

a. Replace broken component (para

b. Bent movable mask ----------------

b. Replace movable mask.