TM 9-4935-294-15/2
is advisable to repeat all applicable steps in the
operational check chart. This serves a two-fold purpose:
4-7. General Disassembly and Assembly
it verifies that the installation of new components has
Instructions
corrected the trouble and that no additional troubles have
The troubleshooting information in chapter 3 contains
been introduced during assembly of the rf head.
test and adjustment procedures designed to reveal
Note. Exercise extreme care when disassembling and
defective components in the test set.
When the
assembling the electromechanical assemblies of the test
troubleshooting procedures indicate the need for
set to prevent damage to component parts
replacement of faulty parts, the applicable disassembly
and assembly instructions contained in paragraphs 4-9
Section III. REMOVAL AND REINSTALLATION OF EQUIPMENT
IN COMBINATION CASES
4-8. General.
(1) Disassembly.
This section provides the necessary instructions for
(a) Removal of rf head. To remove the rf head,
removal and reinstallation of rack-mounted equipment
refer to figure 4-2 and proceed as follows:
contained in the combination cases. Instructions, for the
1. Rotate the left-hand pawl fastener to release
removal and reinstallation of the drawer assembly in
position.
combination cases are given in section V.
All
2. Slide rf head assembly (2) forward and
procedures require initial removal of the cover assembly,
which attaches with eight cover locks.
remove.
(b) Removal of tunable synchronizer. To remove
tunable synchronizer, refer to figure 4-2 and proceed as
4-9. Removal and Reinstallation of Signal
follows:
Source in Combination Case No. 1.
1.
With rf head assembly (2) removed,
a. Removal. To remove the signal source from its
disconnect all wires from the terminal strip on left side of
combination case, refer to figure 4-1 and proceed as
tunable synchronizer (5). 2. Remove strap (3) by
follows:
removing six screws (4).
(1) Loosen two thumbscrews (1) and open two
3. Remove attaching rear screw (6) and washer
rf head retaining hinges (2).
(7).
(2) Rotate the rf head right-hand pawl fastener,
4. Free and remove synchronizer (5) from
which secures signal source (5) to the frame of
power supply (1) by removing screws (8) and washers
combination case (3), to release position.
(9).
(3) Remove six retaining screws (6) and
(2) Assembly.
washers (7) securing signal source (5) to
(a) Reinstallation of tunable synchronizer. To
combination case (3).
reinstall the tunable synchronizer, refer to figure 4-2 and
(4) Slide signal source (5) forward until the
reverse the order of removal.
slides lock in full forward position, then lift slide
(b) Reinstallation of rf head. To reinstall the rf
locking latches and remove unit from combination
head, refer to figure 4-2 and reverse the order of
case.
removal.
(5) Disconnect power supply line cord from
combination case receptacle.
4-10. Removal and Reinstallation of Graph
Note. The rf head assembly can be removed from the
ic Display System and Combining
signal source independently by rotating both the right-
Case in Combination Case No. 2.
and left-hand pawl fasteners to release position and
a. Removal of Graphic Display System. To remove
sliding the rf head out.
the graphic display system, refer to figure 4--3 and
b. Reinstallation. To reinstall the signal source, refer
proceed as follows:
to figure 41 and reverse the order of removal.
c. Disassembly and Assembly of: Signal
Source.
Change 1 4-2