Disassembly; Installing The Top Cabinet - Sharp MS722 - MiniDisc Recorder - Metallic Service Manual

Cares before disassembling
When assembling the machine after disassembling or
repair, observe the following requirements so as to
ensure safety and performance.
1. Remove the batteries from the machine, and take out the
mini-disc.
2. When assembling after repair, be sure to restore the
initial location of wires.
Since the screws are small, incorrect fixing may result in
malfunction.
3. When repairing, pay utmost attention to static electricity
of ICs.
STEP REMOVAL
1 Bottom Cabinet 1. Battery Cover ......... (A1) x1
2. Screw ..................... (A2) x6
2 Top Cabinet 1. Screw ..................... (B1) x3
2. Flexble PWB .......... (B2) x2
3 Main PWB 1. Screw .................... (C1) x2
2. Flexble PWB ......... (C2) x2
3. Soldering ............... (C3) x4
4 Mechanism Unit 1. Raise the rear part, and remove
(Illustration: MD-MS722)
Cares when servicing:
Be sure to use the screw with washer (Part code: LX-BZ0822AFFC,
Distribution code: 124 970 0187). If a screw of different length is used
by mistake, MD ejection may be disabled.
Figure 11-4
Figure 11-5

DISASSEMBLY

PROCEDURE
in the arrow direction.
ø1.4x2.5mm

INSTALLING THE TOP CABINET

Insert the key flexible PWB
at first into the clearance of
center cabinet.
Bottom Cabinet
(A2)x1
ø1.4x2.5mm
Center
Cabinet
FIGURE
11-1
Put the fold on the connector, and
apply with the felt. Sagging may
result in contact with the sheet metal.
11-1
Felt
11-2
11-2
11-3
(C2)x1*
Flexble PWB for
optical pickup
Caution:
Carefully handle the main PWB and flexible PWB. After removing the
flexible PWB (*1) for the optical pickup from the connector, do not
touch directly the front end of flexible PWB with your hand so as to
prevent damage of optical pickup by static electricity.
– 11 –
MD-MS722/C/W/MS721W
(A2)x2
ø1.4x2mm (A2)x1
ø1.4x2mm
Top Cabinet
Figu re 11-1
(C1)x1
ø1.7x2.5mm
Main PWB
Pull
Pull
Pull
Pull
Pull
(C3)x3
(C2)x1
(C3)x1
Figure 11-2
Mechanism Unit
Figure 11-3
Figure 11-6
(B1)x1
ø1.4x2mm
(A1)x1
Pull
(A2)x2
ø1.4x2mm
(B1)x2
ø1.4x2mm
(B2)x1
(C1)x1
ø1.7x2.5mm
(B2)x1
Pull
Top Cabinet
Do not allow rise of
upper cabinet.