Read Sharp QT-CD250 (serv.man6) Service Manual online
QT-CD250H/W
– 8 –
1
Top Cabinet/
1. Screw ................... (A1) x7
8-1
Front Cabinet
2. Socket .................. (A2) x1
3. Screw ................... (A3) x1
2
Power PWB/
1. Screw ................... (B1) x2
8-2
Terminal PWB
2. Hook ..................... (B2) x2
3. Socket .................. (B3) x1
4. Hook ..................... (B4) x2
4. Hook ..................... (B4) x2
3
Switch PWB
1. Screw ................... (C1) x2
8-2
2. Socket .................. (C2) x1
3. Hook ..................... (C3) x2
4. Screw ................... (C4) x4
3. Hook ..................... (C3) x2
4. Screw ................... (C4) x4
4
Main PWB/
1. Socket .................. (D1) x1
8-2
CD Control PWB
2. Screw ................... (D2) x7
(Note)
3. Screw ................... (D3) x1
4. Solder ................... (D4) x3
5. Socket .................. (D5) x3
4. Solder ................... (D4) x3
5. Socket .................. (D5) x3
8-3
6. Screw ................... (D6) x6
7. Hook ..................... (D7) x2
7. Hook ..................... (D7) x2
5
CD Mechanism
1. Screw ................... (E1) x3
8-3
6
Tape Mechanism
1. Screw ................... (F1) x4
8-3
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling the
unit and reassembling it, to keep it safe and ensure excellent
performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
Follow the below-mentioned notes when disassembling the
unit and reassembling it, to keep it safe and ensure excellent
performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3. Take off nylon bands or wire holders where they need to
be removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.
the unit, be sure to rearrange the leads where they were
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
STEP
REMOVAL
PROCEDURE
FIGURE
Figure 8-3
Figure 8-1
Figure 8-2
CD MECHANISM SECTION
Perform steps 1 to 5 of the disassembly method to remove the
CD mechanism.
CD mechanism.
How to remove the pickup (See Fig. 8-4.)
1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2)
x1 pc.
2. Remove the stop washer (A3) x1 pc., to remove the gear
(A4) x 1 pc.
3. Remove the pickup.
Stop
Washer
(A3) x1
Washer
(A3) x1
CD
Mechanism
Mechanism
Gear
(A4) x1
(A4) x1
Shaft
(A2) x1
(A2) x1
Pickup
(A1) x2
ø2.6 x6mm
REMOVING AND REINSTALLING THE MAIN PARTS
Figure 8-4
Note : (Figure 8-3 and Figure 8-4)
After removing the connector for the optical pickup from the
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
front end of connector to protect the optical pickup from
electrostatic damage.
(E1)x3
ø2.5x10mm
ø2.5x10mm
(F1)x4
ø3x10mm
ø3x10mm
(D5)x1
(D5)x2
Top Cabinet
(D6)x6
ø3x8mm
ø3x8mm
(D7)x2
Washer
CD Mechanism
CD Control
PWB
PWB
Tape
Mechanism
Mechanism
Top Cabinet
AC Socket
(B1)x2
ø3x12mm
ø3x12mm
(D2)x7
ø3x12mm
ø3x12mm
(C1)x2
ø3x12mm
ø3x12mm
(C4)x4
ø3x10mm
ø3x10mm
(D3)x1
ø2.5x8mm
ø2.5x8mm
Main PWB
Power PWB
(D4)x3
(B3)x1
(B2)x2
(B4)x2
(D1)x1
CD Lid
Switch
Switch
Power Transformer
Terminal
PWB
PWB
(C3)x2
Switch PWB
(C2)x1
SW651
(Voltage Selector)
QT-CD250W Only
(Voltage Selector)
QT-CD250W Only
Power Transformer
(A1)x3
ø3x12mm
ø3x12mm
Top Cabinet
Front Cabinet
(A1)x4
ø3x12mm
ø3x12mm
SP202
R-CH
Main
PWB
PWB
(A2)x1
(A3)x1
ø3x10mm
ø3x10mm
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