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 TM 9-1240-375-34&P
0002 00
LOCATION AND DESCRIPTION OF MAJOR COMPONENTS - Continued
M137A2/M137A3 Panoramic Telescope - Continued
7.
Battery Enclosure Assembly (7). The battery enclosure is located on the counter box assembly. It is
used to hold the batteries and is equipped with a power switch.
8.
Battery Power Switch (8). The power switch is located on the left side of the battery enclosure
assembly. It is used to cycle the battery power on and off. The power switch has a three-second delay.
9.
Battery Enclosure Assembly (9). The battery enclosure is located on the elbow telescope. It is used to
hold the battery.
M138 Elbow Telescope
1
3
4
2
M 138
1 fc 0 1 5
1.
Optical Instrument Latch Set (1). The optical instrument latch set is attached to the eyepiece end of
the M138 telescope. The optical instrument latch set is used for mounting the telescope to the M172
mount.
2.
Eyepiece Cell Assembly (2). The eyepiece cell assembly is inside the diopter adapter assembly, which
is attached to the telescope. The eyepiece cell assembly consists of a series of lenses and spacers.
3.
Reticle Cell Assembly (3). The reticle cell assembly is inside the rear of the diopter adapter assembly.
The reticle cell assembly consists of an optical element cell, and a nuclear lamp for reticle illumination.
4.
Objective Cell Assembly (4). The objective cell assembly is located inside the optical instrument
housing. The objective cell assembly consists of an optical element cell and an optical instrument lens.
An optical instrument eyeshield is attached to the diopter adapter assembly.
0002 00-12
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