Disassembly - Sharp MD-MX30 Service Manual

MD-MX30/MX30W
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
STEP REMOVAL
1 Top Cabinet 1. Screw ................ (A1) x7
2 Side Panel (Right,Left) 1. Screw ................ (B1) x8
3 Rear Panel 1. Socket ............... (C1) x1
2. Screw ................ (C2) x6
4 Main PWB 1. Screw ................ (D1) x9
(Note 1) 2. Flat Cable .......... (D2) x4
3. Socket ............... (D3) x3
5 Tuner PWB 1. Screw ................ (E1) x4
6 Power PWBx2 1. Socket ............... (F1) x1
2. Screw ................ (F2) x9
7 MD/CD Holder 1. Screw ................ (G1) x8
2. Flat Cable .......... (G2) x1
8 Front Panel 1. Screw ................ (H1) x4
9 Volume PWB 1. Knob .................. (J1) x1
2. Screw ................ (J2) x3
3.Nut ...................... (J3) x1
10 Display PWB 1. Knob .................. (K1) x1
2. Nut ..................... (K2) x1
3. Screw ................ (K3) x8
11 CD Servo PWB 1. Socket ............... (L1) x5
(Note 1) 2. Lug .................... (L2) x1
3. Screw ................ (L3) x3
12 MD Holder 1. Screw ................ (M1) x3
(MD Unit) 2. Screw ................ (M2) x4
13 CD Mechanism 1. Screw ................ (N1) x3
14 MD Mechanism 1. Screw ................ (P1) x8
(Note 1) 2. Flat Cable .......... (P2) x3
3. Flexible PWB .... (P3) x1
4. Socket ............... (P1) x2
Note 1:
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.

DISASSEMBLY

PROCEDURE
FIGURE
10-2
10-2
10-3
11-1
11-1
11-2
11-3
11-4
11-5
11-5
11-6
11-6
11-7
12-1
Notes for servicing (For MD-MX30 only)
• This model is equipped with a fan. If you remove the fan to
service the unit, it enters the protection mode and the
power cannot be turned on by pressing the POWER
button. In such a case, follow the procedure below.
(Refer to Fig.10-1.)
1. Check whether a resistor (RV 66,39ohm,1/2W) is inserted.If
not, connect it (39ohm,1/2W).
2. Connect the patterns circled with a dotted line by soldering.
• Desolder to reassemble the unit after repairing. If you fail
to desolder, the power turns off soon because the unit
enters the protection mode when the fan rotates at a high
speed (high power).
• These steps are unnecessary to service the unit with the
fan connected.
B C E
QV51
RV53
RV09
CV56
CV09
RV21
CV13
V02
CV15 DV06
CNPV01
2 3 4 5
RV20
2 1
RV19
DV05
MAIN PWB-A1
NSV02
11 - G,H
APLAY PWB
MAIN UNIT
(A1) x2
ø3 x12mm
(B1) x2
ø3 x12mm
(B1) x2
ø3 x12mm
Side
Panel(R)
(A1) x3
ø3 x12mm
(B1) x2
ø3 x12mm
(C2) x6
ø3 x10mm
Rear Panel
– 10 –
CV59
RV01
3
2
RV11
1 RV50
CV07
CV53
RV07
RV05
RV03
CV62
RV66
LUGV01
CHASSIS
GND
1
2
RD
1
2
CNSV01
MV01
FAN MOTOR
Figure 10-1
Illustration: MD-MX30
Cabinet
(B1) x2
ø3 x12mm
Side Panel(L)
Figure 10-2
(C1) x1
Figure 10-3
B
C
E
BIV01
(A1) x2
ø3 x12mm