TM 32-5835-005-14 & P
Section
IV.
MAINTENANCE
OF
TRANSPORT
MECHANISM AND
ELECTRONICS
8-18. Mylar Belt Replacement.
8-16. Scope of Repair.
(a) Remove top cover by loosening the
Repair procedures at the general support
fourteen (14) captive screws with a
level consist of disassembly of the unit
#2 Phillips screwdriver.
as far as required to replace a faulty
subassembly, located by troubleshooting,
(b) Place cassette mode switch in
removal and replacement of the subassem-
LOAD/UNLOAD.
bly and reassembly of unit. Some repair
at the subassembly level may be accom-
plished by direct support maintenance
(c) Remove tape counter belt from
personnel. (See para. 7-3).
counter pulley.
8-17. Disassembly Procedures.
(d) Loosen four (4) captive front
panel screws with a " blade screw-
To disassemble the AN/UNH-17A Recorder/
driver.
Reproducer Set, proceed as follows:
(e) Disconnect transport plug A1P1.
(a) Remove all attached cables and
(f) Remove transport from chassis
microphone from unit.
panel assembly.
(b) If vehicle mounted, loosen knurled
screws and remove recorder/reproducer
(g) Place transport on its side such
that supply motor is up and drive pulleys
from mounting base.
are facing the operator.
(Do not place
(c) The Recorder/Reproducer is now
transport cassette side down as this
will damage flat spring guides).
disassembled and repairable. Remove
top and bottom covers to gain access
to transport and chassis. Use Phillips
(h) Remove the two (2) screws holding
#2 screwdriver.
the capstan speed sensor cover plate
with a #1 Phillips screwdriver.
NOTE
(i) Remove cover plate of capstan
Disassemble only as required to replace
speed sensor.
a faulty component. For an exploded
view of parts, see Fig. C-3.
(j) Pull belt off pulleys with fingers
and carefully slide belt over optical
(d) Before any disassembly of the
disc. Do not touch disc with fingers
transport is attempted, the operational
and avoid scratching.
(Do not clean
tests, paragraph 8-34, and the trouble-
disc with solvents).
shooting procedures, table 8-3 and par-
agraph 8-7, should have been accomplish-
(k) Carefully encircle optical disc
with replacement belt.
ed to determine that a malfunction
exists.
(l) Encircle lower pulley with belt
using index finger to guide it.
(m) While holding belt on lower pulley,
guide remainder of loop over upper
pulley with fingers of other hand. A
slight rotation of the pulleys will
pull belt into place.
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