TM-9-1240-400-34-P
TELESCOPE; PANORAMIC: M115, ELBOW: M139, MOUNT: M138 AND M137
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1993
TM-9-1240-400-34-P - Page 25 of 344
TM 9-1240-400-34&P
Section III.
TROUBLESHOOTING
2-6.
GENERAL.
a.
The symptom index can be used as a quick guide to troubleshooting.
Common malfunctions are listed in
alphabetical order with a page number reference to the troubleshooting table, where a test or inspection and
corrective action are provided.
b.
The direct support troubleshooting table lists the common malfunctions which may be found during maintenance
of the M115 panoramic telescope.
Refer to page 29.
Perform the tests/inspections and corrective actions in the
order listed.
c.
The general support troubleshooting table lists the common malfunctions which may be found during maintenance
of the M115 panoramic telescope.
Refer to page 210.
Perform the tests/inspections and corrective actions in the
order listed.
d.
This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions.
DIRECT SUPPORT SYMPTOM INDEX
Troubleshooting
Procedure
(Page)
OPTICAL LENS
Focus out of adjustment .
........................................................................................................................
2-9
Fogged or condensation present.
...........................................................................................................
2-9
Table 2-2.
DIRECT SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
OPTICAL LENS
1.
LENS (1) FOCUS OUT OF ADJUSTMENT.
Observe visually.
Focus lens.
Refer to
page 2-63.
2.
LENS (1) FOGGED OR CONDENSATION
PRESENT.
Observe visually.
Purge and charge tele-
scope.
Refer to TM 750-116.
2-9
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