TM 11-6625-821-45
(2) Remove the cover that shields the
moval of the test set front panel is described
(3) Unsolder the two twisted pairs of
sembly and replacement procedures are de-
leads and the two shields from ter-
minal board TB4 mounted on the rear
graphs 38 through 312 also include instruc-
side of the LOOP SIMULATOR.
tions for lubrication that is performed during
Label leads so they can be identified
reassembly of the major components.
for replacement of the LOOP SIM-
b. A special tool is required to disassemble
ULATOR.
(4) Unsolder the yellow and green leads
of resolver B1 from the converter cir-
tool is a number 4 Presto Combination Hand
cuit terminal boards.
and Pointer Puller, manufactured by G. D.
(5) Remove the three screws and nuts that
Gustason Manufacturing Company, Chicago,
secure the LOOP SIMULATOR to
Ill.
the test set front panel.
(6) Remove the LOOP SIMULATOR from
3-3. Removal and Disassembly of
Inverter
the front of the test set.
a. Removal.
b. Disassembly (fig. 3-1).
(1) Remove the INVERTER plate by re-
(1) Remove eight machine screws (28)
moving the two screws that secure it
to the test set front panel.
(2) Pull rear housing (26) away from
(2) Loosen the screws (located on each
front cover (5).
side of the inverter) that secure the
inverter to the test set.
(3) Remove gasket (25).
(4) Grasp resolver B1 (21) with one hand
(3) Firmly grasp the inverter, and pull
and f rent cover (5) with the other
it straight back from the test set front
hand. With a slight twisting motion,
panel.
separate f rent cover (5) from re-
b. Disassembly. Disassemble the inverter if
solver housing (17).
required.
(5) Loosen two setscrews (2 and 3), and
3-4. Removal and Disassembly of
remove knob (1).
Control Unit
(6) Remove spring washer (4).
a. Removal.
(7) Slide the shaft of drive gear (7) out
of front cover (5).
(1) Loosen the Dzus fasteners in each cor-
ner of the control unit.
(8) Remove shaft sleeve (6) from front
cover (5).
(2) Lift the control unit out of the test
set until the connector on the rear of
Note. If desired, dial window (9) can now
the control unit is accessible.
be removed by carefully pushing around
the outer edge of dial window (9) toward the
(3) Disconnect P1 of the test set from
rear of front cover (5).
the connector on the rear of the con-
trol unit.
pull needle (11) straight back off
b. Disassembly. Refer to TM 115826-225-
the shaft of resolver B1 (21).
35, for the control unit disassembly procedures.
(10) Remove dial retainer (10) from re-
solver housing (17).
3-5. Removal and Disassembly of
LOOP SIMULATOR
(11) Lift dial (12) out of resolver hous-
ing (17).
a. Removal.
(12) Lift idler gear (16) out of resolver
(1) Remove the test set front panel
housing (17).