Specifications

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