Disassembly - Sharp MD-M3 Service Manual

Caution on Disassembly
The disassembling the machine or assembling it after
repair, observe the following instructions to ensure safety
and keep its performance.
1. Unload the compact disc, and mini-disc, cassette tape
from machine.
2. Be sure to unplug the power cable before starting
disassembly of the machine.
3. When disassembling each section, remove the nylon
band or wire arrangement.
After servicing the unit, be sure to rearrange the leads
where they were before disassembling.
If a screw of improper length is fit to the MD mechanism.
(A screw fit the part to the mechanism chassis of MD
section), it may contact the optical pickup, impeding
normal operation. Hence, due care must be taken.
4. While repairing, pay utmost attention to static electricity
on ICs.
MAIN UNIT MD-M3/M1
REMOVAL
STEP
1 Top Cabinet 1. Screw ................ (A1) x4
2. Socket ............... (A2) x3
2 Side Panel (Right,Left) 1. Screw ................ (B1) x7
(Note 2)
3 Rear Panel 1. Screw ................ (C1) x4
4 Main PWB 1. Flat Wire ............ (D1) x1
(Note 2) 2. Lead Wire .......... (D2) x1
3. Screw ................ (D3) x6
4. Socket(MD-M3) .... (D4) x3
4. Socket(MD-M1) .... (D4) x2
5. Flat Cable .......... (D5) x4
5 Power/Tuner PWB 1. Screw ................ (E1) x4
2. Socket ............... (E2) x1
3. Flat Cable .......... (E3) x1
6 MD Unit and Holder 1. Screw ................ (F1) x4
(Note 1,2) 2. Screw ................ (F2) x5
7 Power PWB 1. Screw ................ (G1) x4
8 Front Panel 1. Screw ................ (H1) x2
9 Jack PWB 1. Screw ................ (J1) x1
10 Display PWB 1. Knob .................. (K1) x1
2. Nut ..................... (K2) x1
3. Screw ................ (K3) x5
11 CD Mechanism 1. Screw ................ (L1) x3
Note 1: When removing or reinstalling the MD unit, avoid a
short circuit by being careful not to allow it to touch the
PWB.(Replacement with the PWB installed)
Note 2: After removing the connector for the optical pickup
from the connector wrap the conductive aluminium foil
around the front end of connector so as to protect the
optical pickup from electrostatic damage.
Cares after repairing
After completion of repair of product set the following shipping
mode to return.
1. Make sure that there is not a CD and MD disc in the tray.
Press and hold the PRESET EQUALIZER and STOP buttons,
and then press the POWER button to enter the TEST mode.
2. After the indication of FINISHED appears, unplug the power
cord. If this test mode is executed, the data stored by the
user in the preset memory are all cleared. It is necessary
tell and obtain the consent of user in advance.

DISASSEMBLY

PROCEDURE FIGURE
11-1
11-1
11-1
11-2
11-3
12-1
12-1
12-1
12-2
12-2
12-3
MAIN UNIT
Top Cabinet
Side Panel
(Right)
(B1)x3
ø3x10mm
(B1)x2
ø3x10mm
(A1)x2
ø3x10mm
(C1)x4
ø3x10mm
(D3)x2
ø3x10mm
Main
PWB
Lug
(D3)x1
ø3x10mm
(D3)x2
ø3x10mm
(D4)x1
(D3)x1
ø3x10mm
Power PWB
(E2)x1
(E1)x1
ø3x10mm
(E1)x1
ø3x10mm
– 11 –
MD-M3/M1
CD
Mechanism
(A2)x2
(A2)x1
(A1)x1
Front Panel
ø3x10mm
(B1)x2
ø3x10mm
Rear Panel
Figure 11-1
(D5)x1 MD-M3 Only
(D4)x1
(D5)x2
Front Panel
(D4)x1
(D5)x1
(D1)x1
(D2)x1
Figure 11-2
Front Panel
(E3)x1
Power/Tuner
PWB
(E1)x1
ø3x10mm
Figure 11-3
(A1)x1
ø3x10mm
Side Panel
(Left)
Jack
PWB
Main
PWB
Lug
(E1)x1
ø3x10mm