ARMY TM 5-6675-308-12
MARINE CORPS TM 08837A-12/1A
(5)
(a) Using cross tip screwdriver, loosen four
Disconnect cable W7 connector W7P1 from
screws and remove bezel from CDU.
PS connector 3J4.
(6)
(b) Grip lamp module with fingers and pull out.
Remove battery box in accordance with para-
graph 4-8a.
(2) Replacement.
Remove front two T-handles and clamping
(7)
(a) Install lamp module by carefully pressing
brackets securing pallet to subfloor.
into place.
Carefully slide primary pallet forward to dis-
(8)
(b) Using cross tip screwdriver, install bezel and
engage alignment pins.
secure to CDU with four screws.
(9)
Lift IMU end of pallet up over fender and
rotate pallet so IMU end sits on rear panel.
lamp module as follows:
(10)
Carefully lift pallet out of the vehicle.
(1)
When a lamp module is installed in the CDU,
perform lamp test and note which segment(s)
(11)
Store mounting hardware on primary pallet.
or bulb(s) is not lighted. The CDU bezel
b. Replacement.
should be removed for this test. See lamp
(1) Load primary pallet in vehicle in accordance
module diagrams in figure 4-4 to determine
which lamp is burned out.
with paragraph 2-11, 2-12 or 2-13.
(2) Replace battery box in accordance with para-
An alternate method for determining a burned
(2)
graph 4-8b.
out lamp is to use a multimeter and check
lamps for open filaments between lamp com-
mon and lamp pins. Note locations of failed
4-10. CDU Repair.
lamps.
Loosen two screws and remove retaining
replace lamp module as follows:
(3)
block.
Replace failed lamp(s).
(4)
Install retaining block and secure with two
(5)
To prevent damage to lamp module pins
screws.
by attempting to install a numeric mod-
Repair of lamp modules may be verified by
ule upside down, note orientation of
(6)
installing the module(s) in the CDU and per-
punctuation marks. Modules occupying
forming a lamp test.
the two leftmost positions of the display
are installed with punctuation marks to
the right. All others are inverted so that
and replace clamping catch as follows:
punctuation marks are to the left.
(1) R e m o v a l . Remove two screws and washers
securing clamping catch to CDU. Remove
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catch.
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(2) Replacement. Secure clamping catch to CDU
with two screws and washers.
Inspect CDU bezel. Replace it if there is
4-11. Primary Pallet Repair. Primary pallet repair consists
damage, such as a torn gasket or cracked
of IMU repair, PS repair, computer repair, and mounting
windows, which might allow water to
base subassembly repair. Except where otherwise noted,
enter.
remove primary pallet from vehicle as described in para-
graph 4-9a prior to performing the indicated repair or
Make sure bezel is firmly seated against
replacement. Upon completion of the repair or replace-
CDU front panel.
ment, return primary pallet to vehicle as described in
NOTE
CDU lamp module replacement can be
performed at any time during the PADS
primary pallet is in the vehicle, and IMU is on primary
mission.
pallet. (See figure 4-5.)
Tools, spare lamp modules, and spare
a. IMU Fan Replacement.
lamps are in battery box top.
(1) Removal.
(1) Removal.
4-26
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