TM 55-4920-429-13
SECTION II MAINTENANCE
4-14. General.
This section contains inspection, testing, component replacement, and cleaning instructions for the test
set. No special tools are required. The test set requires no lubrication.
4-15. Panel Removal.
(See fig. 5-1.) Remove the cover and panel as follows:
a. Press the air pressure relief valve (11) in the cover to equalize inside and outside air pressure.
b. Unlatch seven latches and remove the cover from the case (10).
c. Remove 23 screws (8) that secure the panel (9) to the case.
d. Carefully lift the panel from case.
4-16. Inspection.
a. Check all electrical connectors for bent or broken pins.
b. Check wires for frayed or worn insulation,
c. Check solder connections for corrosion or poor mechanical connection.
d. Check rotary switches for proper alignment of switch positions with panel markings.
4-17. Disassembly.
(See fig. 5-3.) Test set components are accessible when the panel-chassis is removed from its case. Card
cage (30) must be removed for access to ILCA DRIVE and ACTUATOR DRIVE switches. Bottom
plate (17) must be removed for test-prod access to left-side panel components. Remove the card cage or
bottom plate as follows:
a. Remove two screws (21) securing retainer (22) to card cage (30).
b. Remove the retainer and rubber from the card cage.
Do not handle or store circuit cards, except in a static-free environ-
ment, using static-free materials. Microcircuits can be damaged by
static.
c. Remove circuit cards A2 (25) and A3 (26).
d. Remove two screws (35) and washers (36) securing the top of the card cage to the front panel.
e. Remove four screws (21) securing the card cage to the support.
f. Remove the card cage.
g. Remove bottom plate (17) of the chassis assembly as follows: Remove 11 screws (16) and remove
the bottom plate.
.
4-3
