ARMY TM 5-6675-238-14
MARINE CORPS TM 08839A-14/1
8-30. Supply Reel Motor B2 or Take-Up Reel Motor
B3 Removal and Replacement. See figure 8-10, sheet 1,
and remove and replace take-up reel motor B3 (17) as
follows:
a. Removal.
(1)
(2)
(3)
(4)
(5)
(6)
Remove two screws (47) and washers (46)
securing cover (45) on rear of take-up reel
motor B3 (17). Allow cover to hang loosely.
Carefully hold red and black take-up reel mo-
tor B3 input leads while pushing cover back
from motor. This compresses the braided
shielding slightly and provides extra lead
length.
Carefully slide sleeving on each wire toward
rear cover for access to solder connection. Tag
and unsolder wires from take-up reel motor
B3.
Remove lock ring (14) from take-up reel mo-
tor B3 shaft.
Loosen setscrew on clamp (15), Remove
clamp from take-up reel motor B3 shaft.
While holding take-up reel motor B3. remove
four screws (16); remove motor.
b. Replacement.
(1)
(2)
(3)
(4)
(5)
Install take-up reel motor B3 (17) through
front panel and secure with four screws (16).
Install clamp (15) on take-up reel motor B3
shaft and secure with setscrew in clamp. Allow
approximately 1/16-inch clearance between
clamp and motor flange.
Install lock ring (14) on take-up reel B3 shaft.
Solder wires to terminals on rear of take-up
reel motor B3. Slide sleeving over solder con-
nections.
Secure cover (45) to rear of take-up reel motor
B3 with two screws (47) and washers (46).
8-31. Step Motor B1 Removal and Replacement. See
figure 8-10, sheet 1, and remove and replace step motor
B1 (35) as follows:
a. Removal.
(1) Tag and unsolder step motor B1 (35) blue,
yellow, brown, and orange wires from terminal
board TB1 (87, figure 8-10, sheet 2) (top side
of resistors R9, R10, R11, and R12, respec-
tively),
(2) Loosen sprocket (9, figure 8-10, sheet 1) set-
screw to disengage sprocket from step motor
B1 shaft.
(3) Remove three screws (34) and clamps (33)
securing step motor B1 (35) to front panel;
remove step motor B1 and sprocket (9).
b. Replacement.
(1)
(2)
(3)
(4)
Install step motor B1 (35) shaft through front
panel with sprocket (9) in place so shaft of
motor goes through sprocket. Secure motor to
front panel with three screws (34) and clamps
(33).
Secure sprocket (9) to step motor B1 shaft
with setscrew in sprocket, Center sprocket
teeth in head groove.
Solder step motor B1 wires to terminal board
TB1 (87, figure 8-10, sheet 2). See tape reader
schematic diagram (figure FO-19) for location
of each color-coded wire on terminal board
TB1.
Adjust step motor B1 in accordance with pro-
.
cedre in table 8-8, test 5.2.
8-32. Transformer T1 Removal and Replacement. See
figure 8-10, sheet 1, and remove and replace trans-
former T1 (39) as follows:
a. Removal.
(1) Tag and unsolder wires from transformer T1
(39).
(2) Remove four screws (19), washers (36), lock-
washers (37), and nuts (38) securing trans-
former T1 (39) to front panel; remove trans-
former T1.
b. Replacement.
(1) Secure transformer T1 (39) to front panel with
four screws (19), washers (36), lockwashers
(37), and nuts (38).
(2) Solder wires to transformer T1 (39).
8-33. Regulator AR1 or Transistor Q1 Removal and
Replacement. See figure 8-10, sheet 1 and remove and
replace regulator AR1 (31) as follows:
a. Removal. Remove two screws (32), insulating
washers (25) washers (24), lockwashers (26), one termi-
nal lug (27), and two nuts (23) securing regulator AR1
(31) to chassis. Pull regulator AR1 from its socket and
remove along with insulator (30).
b. Replacement. Cover insulator and regulator with
head conductive sealing compound (960004-1). Place
insulator (30) under regulator AR1 (31) and plug regula-
tor AR1 into its socket. Secure regulator AR1 to chassis
with two screws (32), insulating washers (25), washers
(24), lockwashers (26), one terminal lug (27), and two
nuts (23).
8-102
