Removing And Reinstalling The Main Parts - Sharp MD-MT877S Service Manual

REMOVING AND REINSTALLING THE MAIN PARTS

Remove the mechanism according to the disassembling meth-
ods 1 to 4. (See Page 10.)
How to remove the spindle motor (See Fig. 11-1.)
1. Remove the solder joints (A1) x 4 of flexible PWB.
2. Remove the screws (A2) x 3 pcs., and remove the spindle
motor.
How to remove the lift motor (See Fig. 11-2.)
1. Remove the solder joints (B1) x 2 of lift motor lead wire.
2. Remove the screw (B2) x 1 pc., and remove the lift motor.
Note:
Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)
How to remove the sled motor (See Fig. 11-3.)
1. Remove the stop washer (C1) x 1 pc., and remove the drive
gear (C2) x 1 pc.
2. Remove the screws (C3) x 2 pcs.
3. Remove the solder joints (C4) x 3 of flexible PWB., and
remove the sled motor.
Note:
Take care so that the motor gear is not damaged.
(If the gear is damaged, noise is caused.)
How to remove the magnetic head (See Fig. 11-4.)
1. Remove the screws (D1) x 2 pcs. of the magnetic head and
the optical pickup, and remove the solder joints (D2) x 2 pcs.
of the head flexible plate.
Note:
Mount carefully so as not to damage the magnetic head.
How to reinstall the optical pickup
(See Fig. 11-4.)
1. Remove the screw (E1) x 1 pc., and remove the grip spring.
2. Remove the screw (E2) x 1 pc. to remove the thrust
spring, and remove the drive screw and the optical
pickup from MD mechanism.
Then, remove the drive screw from the optical pickup.
(E1) x 1
ø 1.4 x 1.8 mm
Grip Spring
Drive
Screw
Optical Pickup
Magnetic
head
(D1) x 2
ø1.4 x 1.8 mm
(D2)x2
(E2) x 1
Solder Joints
ø 1.7 x 3.5 mm
Thrust
Spring
MD Mechanism
Figure 11-4
(C2) x 1
– 11 –
MD-MT877/MD-MT877C
(A2) x 3
ø 1.4 x 3 mm
Spindle Motor
Solder joints
(A1) x 4
MD Mechanism
Figure 11-1
(B2) x 1
ø 1.4 x 3.8 mm
Lift Motor
Solder Joints
(B1) x 2
MD Mechanism
Figure 11-2
(C3) x 2
ø 1.4 x 1.2 mm
Sled
Motor
(C1) x 1
(C4) x 3
Solder
Joints
MD Mechanism
Figure 11-3