Changes in force: C 2, C 3, and C 4
TM 11-6625-496-45
C4
HEADQUARTERS
CHANGE
DEPARTMENT OF THE ARMY
W ASHINGTON , D.C. 9 July 1970
No. 4
GS and Depot Maintenance Manual
Including Repair Parts and Special Took Lists
TEST SETS AN/VRM-1 AND AN/VRM-1A
TM 11-6625-496-45, 3 July 1962, is changed as follows:
The title of this manual is changed as shown above.
NOTE
1A and TS-1777A/VRM-l. Model differences are
"GS" maintenance stands for general
described in (1) through (4) below.
support maintenance. All references in
(1) Test Set, Radio TS-1777A/VRM-l (part
t h i s manual to "fourth echelon" or
of Test Set, Radio AN/VRM-lA) is identical with
"fourth echelon maintenance are the
Test Set, Radio TS-1777/VRM-l (part of Test
.
same as GS or general support mainte-
Set, Radio AN/VRM-1) except for the case and
nance.
cover.
(2) The TS-1777/VRM-l and TS-1777A/
Throughout the manual change the following
VRM-l front panel and attached chassis are
figure references as indicated
mechanically and electrically identical with each
From
To
other and may be mounted in the case of either
12 . . . . . . . . .12 and 12.1
the TS-1777/VRM-l or TS-1777A/VRM-l ((3)
l3 . . . . . . . . . . . . 18 and 13.1
15 . . . . . . . . . . ..l5 and l5.l
below) .
16 . . . . . . . . . . ..l6 and l6.l
(3) In the TS-1777/VRM-1, the case has
17 . . . . . . . . . . ..l7 and l7.l
six latches, the chassis panel is flush with the
18 . . . . . . . . . . ..l8 and l8.l
edge of the case, and the gasket in the cover is
23 . . . . . . . . . . ..23 and 23.l
on the edge of the cover. In the TS-1777A/VRM-
30 . . . . . . . . . . . . 30 and 30.1
38 . . . . . . . . . . . . 38 and 38.1
1, the case has four latches, the chassis panel is
39 . . . . . . . . . . ..39 and 39.l
sunk below the edge of the case, and the gasket
in the cover is recessed (fig. 11.1).
Page 2, paragraph 1. Make the following
(4) On instruction plates for the TS-1777A/
Changes:
VRM-1 (TM 11-6625496-12), an additional in-
Subparagraph c (page 1 of C 3), last line.
struction in the first plate advises the user to
Change "(NMP)-MA" to: NMP-EM.
return good modules to the radio set, and on the
Add subparagraph d after subparagraph c.
second plate, switch position 19 is used instead
of position A for test No. 11 of crystal reference
d. All references in this manual to ANmRM-
1 and TS-1777/VRM-l also apply to AN/VRM-
system A3000.
1
