4-12·2. Installation And Adjustment; Lead Screw Ass'y - Sony OA-D32W Service Manual

Lead Screw
Ass'y
Replacement
ED
c. Install the head load ass'y in place. (Refer to
4-8)
ED
<I.
Install the damper in place. (Refer to 4-7)
e. Install both the FC-9/FC-14 Mounted Board
and shield plate. (Refer to 4-1)'
f. Make the head clean. (Refer to 5-11)
g. Perform the radial alignment and TRK 00
sensor adjustment. (Refer to 5-4)
h. Install the front panel ass'y in place. (Refer
to 4-2)
i. Install the main cover in place. (Refer to 4-5)
4-13_ LEAD SCREW ASS'V (STEPPING MOTOR/
LEAD SCREW/COUPLING ASS'V/CaM-
PRESSION SPRING (4-601-083-GO) )
REPLACEMENT
4-13.1. Removal
a. Remove both the FC-9/FC-14 Mounted Board
and shield plate. (Refer to 4-1)
b. Remove the front panel ass'y. (Refer to 4-2)
c. Remove the main cover. (Refer to 4-5)
d. Attach the rotary knob to the rear shaft of
the stepping motor with hexagon wrench
torque driver. (Refer to Fig. 4-13 (a»
Check if the gap between the motor bearing
metal and rotary knob
is
approximately
0.5mm.
e. Manually set the machine into the Disk-In
mode. (Refer to Fig. 4-9 (a»
ED
f. Remove the damper. (Refer to 4-7)
ED
g. Remove the head load ass'y. (Refer to 4-8)
h. Remove the cassette-up ass'y. (Refer to 4-9)
i. Remove die two screws (PSW2.6 x 6) which
fasten the stepping motor. (Refer to Fig. 4-13
(b»
Compression Spring
-
Rotary Knob
I
Stt:pping Motor
@
-
-
~
Coupling Ass'y
(a)
-36-
Fig. 4-13 Stepping Motor (SNS·1100A), Coupling
Ass'y and Compression Spring Replacement'
j.
Turning the rotary knob, remove the lead
screw ass'y.. DUring removal, hold with the
tweezers the ball bearing which hold the lead
screw, as shown in Fig. 4-13 (b)-I.
4-13-2. Installation and Adjustment
NOTE: If the replacement can
be
made with lead screw
ass'y,
steps
8
up to II should be skipped.
NOTE: Apply
Sony
grease (same quantity of watch tip) on
whole area of lead screw before replacing it.
a. Stepping motor, lead screw, coupling ass'y
and thrust bearing must be roughly assembled'.
b. Pressing the coupling ass'y to the lead screw,
fasten the setscrew near the lead screw with a
hexagon wrench torque driver. (Refer to Fig.
4-13 (a»
c. Pressing the coupling ass'y to th~ stepping
motor, fasten the setscrew near the stepping
motor with a hexagon wrench torque dirver.
(Refer to Fig. 4-13 (a) )
d. Turning the rotary knob, pass the lead screw
through the opening of the ball bearing along
the path indicated by arrow. (Refer to Fig.
4-13 (b) )
e. Fasten loosely the stepping motor with the
two screws (PSW2.6 x 6).
f. Loosen the setscrew ne!U" the stepping motor
so that the lead screw touches the ball bearing
by the force of the compression spring.
g. Pulling the rotary knob lightly, fasten the set-
screw near the stepping motor with a hexagon
wrench torque driver.