ARMY TM 9-1240-379-34
MARINE CORPS TM 04332A-34
GENERAL SUPPORT MAINTENANCE INSTRUCTIONS
Section I. TROUBLESHOOTING
3-1. TROUBLESHOOTING INFORMATION.
manual cannot list all malfunctions that may
a. The symptom index can be used as a
occur, nor all tests or inspections and cor-
quick guide to troubleshooting. Common
rective actions. If the malfunction is not
malfunctions are listed in alphabetical order
listed, or if the malfunction still exists after
with a page number reference to the
all listed corrective actions have been per-
troubleshooting table where a test or inspec-
formed, notify your supervisor.
tion and corrective action are provided.
b. Table 3-1 lists the malfunction, the
test or inspection indicating the malfunction,
and the corrective action needed. This
SYMPTOM INDEX
Troubleshooting
Procedure
(Page No.)
ELBOW ASSEMBLY
No night channel image, low brilliance of night image, or night
image flickers or moves.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Poor or no illumination of night reticle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Table 3-1. TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELBOW ASSEMBLY
POOR OR NO ILLUMINATION OF NIGHT RETICLE.
1.
With objective lens covered to simulate darkness, turn shutter assembly
switch ON (reset if needed) and operate TUBE control knob.
If image intensifier lights, replace RETICLE control knob (page
a.
b.
If image intensifier does not light, replace regulator assembly
c.
If malfunction still is not corrected, replace elbow assembly
