SD-EX220 (serv.man2) - Sharp Audio Service Manual (repair manual). Page 8

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SD-EX220H
3 – 1
Audio
SD-EX220H
Service Manual
Market
E
 
CHAPTER 3. 
MECHANISM BLOCKS
[1] 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. Be sure to remove the power supply plug from the wall outlet before starting to disassemble the unit.
2. 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.
3. Take sufficient care on static electricity of integrated circuits and other circuits when servicing.
1
Rear Cabinet
1. Screw ...................... (A1) x7
2
Main PWB/
1. Screw ...................... (B1) x7
Tuner Unit
2. Jack Cover, Left ...... (B2) x1
(Note)
3. Screw ...................... (B3) x4
4. Socket ..................... (B4) x9
5. Flat Cable ............... (B5) x1
3
Front Panel
1. Screw ...................... (C1) x5
2. Hook ........................ (C2) x1
3. Socket ..................... (C3) x1
4
Power PWB
1. Screw ...................... (D1) x6
2. Bracket .................... (D2) x1
5
1-Bit Amp. Unit
1. Screw ...................... (E1) x2
6
Display PWB
1. Screw ....................... (F1) x6
2. Frame Support ......... (F2) x1
3. Screw ....................... (F3) x6
4. Socket ...................... (F4) x2
7
Headphones PWB 1. Screw ...................... (G1) x1
8
Switch PWB
1. Screw ...................... (H1) x1
9
CD Mechanism
1. Screw ....................... (J1) x4
2. Screw ....................... (J2) x2
10
Protect Circuit
1. Screw ...................... (K1) x2
PWB/1-Bit Amp.
2. Socket ..................... (K2) x1
Shield Case
3. Screw ...................... (K3) x2
4. Bracket .................... (K4) x1
5. Screw ...................... (K5) x3
11
1-Bit Amp. PWB
1. Screw ....................... (L1) x3
STEP
REMOVAL
PROCEDURE
SD-EX220H
Note:
1. After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the front end
of the connector so as to protect the optical pickup from electro-
static damage.
(A1)x4
φ3x10mm
(A1)x3
φ3x12mm
Rear
Cabinet
Front
Panel
(B1)x2
φ3x8mm
(B3)x1
φ3x10mm
Main PWB
Washer
Tuner Unit
Front Panel
(B4)x5
(B4)x3
(B5)x1
(B4)x1
(B2)x1
(B1)x4
φ3x10mm
(B3)x3
φ3x10mm
(B1)x1
φ3x8mm
1-Bit Amp.
Unit
(D2)x1
(C3)x1
(C1)x3
φ3x8mm
(C1)x2
φ3x10mm
(E1)x2
φ3x6mm
(D1)x6
φ3x10mm
Power PWB
1-Bit Amp. Unit
(C2)x1
Front
Panel
Display
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