Specifications

35. General Parts
Techniques
All the parts
Section III.
Replacement
of Test Set, Radio AN/
VRM-1 can be reached and replaced easily
without special procedure
s. The following
precautions apply specifically to the AN/
VRM-1.
a. Use a pencil-type soldering iron with
a 25-watt maximum capacity. The AN/
VRM-1 contains semiconductor devices
and is transistorized. If the iron must be
used with ac, use an isolating transformer
between the Iron and the ac line. Do not
use a soldering gun damaging voltages can
be induced in Components.
b. When soldering semiconductor leads,
solder quickly, wherever wiring permits,
use a heat sink (such as long-nosed pliers)
between the soldered joint and the semi-
conductor.
REPAIRS
36. Removal and Replacement of Front
Panel and Chassis
(fig. 12 and 18)
a. Removal.
Remove the front panel
and chassis from the ease as follows:
(1) Loosen the eight captive screws
(fig. 12) that secure the front panel
to the case.
(2) Carefully lift the front panel and
chassis out of the case; be careful
not to damage the gasket (fig. 18).
b. Replacement. Replace the front panel
and chassis as follows:
(1)
(2)
Place the front panel gasket in
position on the case.
Place the front panel and chassls
over the chassis well (test jack A
next to the case cable compartment)
and carefully lower the front panel
and chassis into the chassis well
24
Figue 12. Test Set, Radio TS-177/VRM-1, upper left oblique view.