CAUTION
CAUTION
CAUTION
TM 55-4920-410-13&P
Section V. DISASSEMBLY/ASSEMBLY
4-13. Main Assembly (Figure C-2).
procedure for removing electrical
assembly from combination case.
a. Open combination case (24, Figure
cover from bottom of combination case.
Following is
components
C-2). Separate
b. Using 5/32-inch socket head key (15), remove screws
(22) and washers (23).
c. Carefully remove electrical components assembly
(21) from bottom of combination case.
4-14. Disassemble y Procedures. Following are
produres for disassembling electrical components
assembly (Fig. C-3).
Disassembly procedures should not include
removal of electronic circuitry parts such as in-
ternal wiring, resistors, and capacitors, unless
such removal is necessary to clean, inspect, or
test part.
a. Remove circuit card assemblies Al through A4 (73
through 76. Figure C-3).
Be careful not to damage wiring or switches.
b. Remove screws (2), lockwashers (3), and washers (4)
from front panel assembly (1). Carefully separate and lift
up front panel assembly, with parts attached, from
posts (5).
c. Separate connector P1 (66) from voltage regulator
VR1 (67).
d. Remove screws (68), washers (69), and voltage regu-
lator VR1 (67).
Make sure center post (5) has insulation sleev-
ing located closest to front panel assembly.
NOTE
Further disassembly is impractical. Disassem-
ble only to the extent necessary to remove
damaged parts or to get to damaged parts.
4-15. Cleaning. Clean all external surfaces with
a dry low-lint cloth. Clean internal areas with dry
filtered air at standard shop pressures.
4-16. Inspection.
a. Combination Case. Inspect combination case (24,
Figure C-2) for cracks, dents, damaged hinges, and loose
hardware.
b. Electrical Components Assembly. Examine compo-
nents and wiring for damage and overheating. Check
meters and switches for damage. Check that all hardware
is securely fastened.
c. Circuit Card Assemblies Al through A4. Examine
for signs of overheating and damaged components, loose
solder connections, and for damaged protective coating.
4-14
