Removing And Reinstalling The Main Parts - Sharp MS722 - MiniDisc Recorder - Metallic Service Manual

MD-MS722/C/W/MS721W

REMOVING AND REINSTALLING THE MAIN PARTS

Remove the mechanism according to the disassembling meth-
ods 1 to 3. (See Page 11.)
How to remove the spindle motor (See Fig. 12-1.)
1. Remove the solder joint (A1) x 1 of flexible PWB.
2. Remove the screws (A2) x 3 pcs., and remove the spindle
motor.
How to remove the lift motor (See Fig. 12-2.)
1. Remove the solder joint (B1) x 2 of slide motor lead wire.
2. Remove the screw (B2) x 1 pc., and remove the flexible
PWB.
3. Remove the screw (B3) 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. 12-3.)
1. Remove the stop washer (C1) x 1 pc., and remove the drive
gear (C2) x 1 pc.
2. Remove the solder joint (C3) x 1 of flexible PWB.
3. Remove the screws (C4) x 2 pc., and remove the sled
motor.
Note:
Take care so that the motor gear is not damaged.
How to remove the magnetic head (See Fig. 12-4.)
1. Remove the screw (D1) x1 which connects the magnetic
head to the head relay flexible PWB, and remove the
soldering joint (D2) x2.
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. 12-5.)
1. Remove the screw (E1) x 1 pc.
2. Slowly raise the optical pickup.
Shaft
Pickup Unit
Figure 12-5
(E1)x1
ø1.7x2.5mm
(B1)x2
Remove the
solder joint
Lift Motor
Stop Washer
(C1)x1
Drive Gear
(C2)x1
Shaft
Pickup Unit
Magnetic Head
Shaft
Pickup Unit
– 12 –
(A2)x3
ø1.4x2.8mm
Spindle Motor
Mechanism Flexible PWB
Solder joint
(A1)x1
MD Mechanism
Figure 12-1
(B3)x1
ø1.4x5.5mm
(B2)x1
ø1.4x1.5mm
MD Mechanism
Figure 12-2
(C4)x2
ø1.4x1.2mm
Sled Motor
(C3)x1
Mechanism Flexible PWB
Solder joint
Figure 12-3
(D1)x1
Ø1.4x1.5mm
Figure 12-4
Solder
joint
(D2)x2