TM 11-6625-2950-13
Section IV. DIRECT SUPPORT MAINTENANCE PROCEDURES
(4) Gasket. Should it be necessary to replace the
5-11. General
gasket, use adhesive per MIL-A-46106, type 1, color
Direct support maintenance for the test set group
clear.
includes disassembly, repair, replacement, and reassem-
c. Indicator. To disassemble the indicator, perform
bly to return the malfunctioning unit to a service
the following procedures:
condition.
(1) Remove the four screws at the rear of the
indicator case.
5-12. Disassembly
a. Interconnecting Box. To gain access to the in-
CAUTION
ternal wiring of the interconnecting box, remove the eight
Do not push the indicator assembly from the
cross-tip screws and remove the rear cover. Should
case using the front lighting panel since this may
replacement of the plug-in relay (K1) be necessary it will
damage the panel.
first be necessary to remove the mounting bracket which
(2) Grasp the rear casting of the indicator and,
is attached to the sidewall of the case. For disassembly of
with a twisting motion, pull the case off the indicator
lamps, test points, jacks and switches refer to figure 5-4.
assembly.
(3) Remove the four screws from the top strap
(1) Access to Fan Housing Assembly. To gain
connecting the front and rear castings.
access to the housing assembly:
(4) Remove the four circuit board mounting
(a) Remove the outer four cross-tip screws on
screws.
the uhf receiver-transmitter side of the air cooler.
(b) Slide the fan and fan plate assembly from the
CAUTION
housing.
The connector pins are easily bent. Pressure to
separate the connectors must be applied evenly
NOTE
to both connectors. Also use care not to bump
The fan and fan plate assembly will remain
indicator wheels while removing boards.
attached to the housing by the internal wiring.
(5) Carefully separate the individual board
(2) Removal of Fan Assembly. To remove the
assemblies.
fan assembly:
(a) Loosen the four cross-tip screws on the fan
CAUTION
plate assembly and rotate the four rim clamps until the
Immediately after each board is removed, insert
flat edge is facing the fan.
dummy shorting plugs in all connectors to
(b) Remove the three wires fron fan terminal
prevent damage to MOS integrated circuits.
strip (fig. 5-1).
5-13. Cleaning
NOTE
Refer to paragraph 3-5 for cleaning instructions on the
When removing the fan assembly, insure the
equipment.
three wires are tagged as to proper location on
the fan terminal strip. If the correct location for
5-14. Reassembly
the wires is unknown, refer to figure 4-1 and
check for continuity to J2.
No special instructions are given for reassembly of the
equipment. Reassembly is obvious upon inspection of the
(c) Remove the fan assembly.
equipment and parts location diagrams.
(3) Removal of Terminal Board TB1. To remove
the terminal board:
(a) Remove the four cross-tip screws holding the
terminal board to the housing assembly.
Repainting and refinishing are covered in detail in
(b) Remove the terminal board from the housing
assembly.
5-16. Lubrication
NOTE
None required.
The terminal board will remain attached to the
housing by the internal wiring.
