Removing And Reinstalling The Main Parts; How To Remove The Spindle Motor; How To Remove The Lift Motor; How To Remove The Sled Motor - Sharp MD-MT831H(GL) Service Manual

REMOVING AND REINSTALLING THE MAIN PARTS

Remove the mechanism according to the disassembling meth-
ods 1 to 5. (See Page 10.)
How to remove the spindle motor (See Fig. 11-1.)
1. Remove the solder joint (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 joint (B1) x 2 of Lift motor.
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 2 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) x4 which connects the magnetic
head to the head relay flexible PWB, remove the spring
washers (D2) x 1 and remove the soldering joints (D3) x 2.
Note:
Mount carefully so as not to damage the magnetic head.
(If the gear is damaged, noise is caused.)
How to reinstall the optical pickup unit
(See Fig. 11-4.)
1. Remove the screw (E1) x 1 pc.
2. Slowly raise the optical pickup.
Pickup Unit
Magnetic head
MD Mechanism
Figure 11-4
(D2)x1
(D1)x1
ø1.4x2.2mm
(D1)x1
ø1.4x1.8mm
Solder Joint
Shaft
(D3)x2
(D1)x2
ø1.4x1.1mm
(E1)x1
ø1.7x3mm
Spring
Mechanism Flexible
PWB Solder Joint
(A1)x4
Solder Joint
(B1)x2
Lift Motor
– 11 –
MD-MT831H/W
(A2)x3
ø1.4x2.8mm
Spindle Motor
MD Mechanism
Figure 11-1
(B2)x1
ø1.4x4.5mm
MD Mechanism
Figure 11-2
(C3)x2
(C1)x1
ø1.4x1.2mm
(C2)x1
Sled Motor
Solder Joint
(C4)x2
MD Mechanism
Figure 11-3