TM-5-5420-202-10
LAUNCHER, M48A5 TANK CHASSIS
OPERATOR'S MANUAL
DECEMBER 2009
TM-5-5420-202-10 - Page 262 of 535
0046
TM 5-5420-202-10
SYMPTOM
MALFUNCTION
CORRECTIVE ACTION
DRIVER’S
NIGHT VISION
VIEWER DOES
NOT OPERATE
ON VEHICLE
POWER (VIEWER
OPERATES
ON BATTERY
POWER).
WARNING
An installed battery can overheat and
may explode when vehicle power is
used. Remove viewer battery from
viewer and store in viewer stowage
box before connecting power cable.
Failure to comply may result in
personnel injury or death.
STEP 1. Remove battery before connecting vehicle
power cable to night vision viewer. Refer to WP 0011.
STEP 2. Check if MASTER BATTERY and NIGHT
VISION power switches are ON. If not, place both
switches ON.
STEP 3. Check if vehicle power cable is loose or not
connected to night vision viewer. Refer to WP 0011.
If not connected, place NIGHT VISION power switch
OFF, and connect vehicle power cable to night vision
viewer.
STEP 4. Place NIGHT VISION power switch in OFF
position, and disconnect vehicle power cable from
night vision viewer. Check for corrosion or dirt on
cable or viewer contacts. If dirty, clean contacts.
Refer to WP 0011.
DRIVER’S NIGHT
VISION VIEWER
DOES NOT
OPERATE ON
VEHICLE POWER
OR BATTERY
POWER.
STEP 1. Check if outside lens cover is installed. If
installed, remove lens cover. Refer to WP 0011.
STEP 2. Check if outside conditions are too bright. If
terrain or sky is too bright, driver’s night vision viewer
will automatically shut off. Point viewer at dark scene.
STEP 3. Check if OFF/BRIGHT rotary switch is set
to OFF. If off, rotate switch to maximum BRIGHT
position.
DRIVER’S NIGHT
VISION VIEWER
PICTURE QUALITY
IS POOR.
STEP 1. Check if OFF/BRIGHT rotary switch is
adjusted properly. If not, rotate to maximum BRIGHT
position and reduce brightness for best image.
STEP 2. Check if lenses are dirty or fogged. If yes,
clean outside lens and eyepiece lens. Refer to
WP 0011.
0046-2
Table 1. Auxiliary Systems and Controls - Continued.
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