Sharp SD-EX220 (serv.man2) Service Manual ▷ View online
SD-EX220H
3 – 2
1
Front Panel
1. Net Frame Ass'y ..... (C1) x1
1. Screw ...................... (A1) x6
2
Woofer
1. Screw ...................... (B1) x4
3
Tweeter
2. Screw ...................... (C2) x3
STEP
REMOVAL
PROCEDURE
CP-EX220H
(F4)x1
(F2)x1
(F1)x6
φ3x10mm
(G1)x1
φ3x10mm
Headphones
PWB
Front Panel
(F4)x1
(F3)x6
φ3x10mm
(H1)x1
φ3x10mm
(J1)x4
φ2.6x10mm
(J2)x2
φ3x10mm
Display PWB
Front Panel
Switch PWB
CD Mechanism
Washer
(K5)x1
φ3x8mm
(K5)x1
φ3x8mm
(K5)x1
φ3x6mm
1-Bit Amp.
Shield Case
Protect
Circuit
PWB
(K3)x2
φ3x6mm
(K4)x1
(K2)x1
(K1)x2
φ3x8mm
(L1)x3
φ3x6mm
1-Bit Amp. PWB
(C1)x1
Rear Cabinet
(A1)x6
φ3x12mm
(B1)x4
φ4x12mm
(C2)x3
φ4x12mm
Woofer
Tweeter
Front Panel
SD-EX220H
3 – 3
[2] Removing and reinstalling the main parts
1. CD mechanism section
Perform steps 1, 2, 3, 6 and 9 of the disassembly method to remove
the CD mechanism.
the CD mechanism.
1.1. How to remove the pickup unit
1. Remove the mechanism cover, paying attention to the pawls (A1) x
4 pcs.
2. Remove the screws (A2) x 2 pcs., to remove the shaft (A3) x 1 pc.
3. Remove the stop washer (A4) x 1 pc., to remove the gear (A5) x 1
pc.
4. Remove the pickup.
Note
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.
wrap the conductive aluminium foil around the front end of connector
so as to protect the optical pickup from electrostatic damage.
1.2. How to Remove the CD door motor
1. Remove the screws (B1) x 2 pcs.
2. Remove the CD door motor.
Caution
Be careful not to damage the gear.
(If the gear is damaged, noise is heard when searching.)
Pickup Unit
(A2)x2
φ
2.6x6mm
(A1)x4
CD Mechanism
Shaft
(A3)x1
Gear
(A5)x1
Stop Washer
(A4)x1
CD Mechanism
Cover
(B1)x2
φ1.8x4mm
CD Door Gear Unit Ass'y
CD Door Motor
SD-EX220H
4 – 1
Audio
SD-EX220H
Service Manual
Market
E
CHAPTER 4.
DIAGRAMS
[1] Block diagram
LED602
LED604
+7.9V
+5V
Q607
ILU_LED
IC608
PST9140
RESET
+5V(VREF)
RESET
Q608
HP_SW
RDS_RDY
RDS_CLK
RDS_DATA
RDS_RST
X_OUT
X_IN
LID
SENS
+5V
+5V
VREF
VCC
SECTION
TO
MAIN
S_MUTE
RESET
+5V
RX_IN
RM601
GP1UM271
PROTECT
SP_RELAY
POWER
A/D_RESET
P_IN
OFFSET
TO MAIN
SECTION
TO CD
CD_RES
CD_CLK
CD_DI
CD_CE/FLASH
CD_DO
CD_DRF
CD_WRQ
JHP601
HEADPHONES
SECTION
TO
MAIN
HP_SW
SECTION
MAIN/TUNER
TUN_DO
TUN_DI
TUN_CLK
TUN_CE
O/C_SW
KEY3
KEY2
KEY1
TUN_SM
SURROUND
VSS
AVSS
4.19
MHz
XL601
-
VF2
-VP
VF1
Q606
-
KEY
SECTION
IC701
IX0557AW
SYSTEM
MICROCOMPUTER
FL
DISPLAY
FL601
-
-
96
30
31
31
3
2
1
1
2
3
6
20
28
19
3
9
8
8
2
1
100
15
95
90
91
92
93
28
5
56
89
41
34
45
44
44
7
88
24
98
81
18
40
41
42
43
97
21
32
38 37 36
33
34
35
39
23
22
80
2
1
1
1
2
TO POWER
SECTION
TO POWER
SECTION
TO
POWER
SECTION
IC780
AN78L05
VOLTAGE
REGULATOR
SW601,602,608,615 SW604,606,607 SW609-SW612
SWITCHING
SW771
CD DOOR
OPEN/CLOSE
D781
SD-EX220H
4 – 2
+7.9V
Q84
DIGITAL
OUT
CONTROL
LEVEL_CONT
TO 1-BIT AMP./
PROTECT CIRCUIT
SECTION
CNP501
TO DISPLAY SECTION
PROTECT
A/D_RESET
OFFSET
PROTECT
TUN_SM
TUN_DO
TUN_CLK
TUN_DI
TUN_CE
TO TUNER UNIT
A_GND
TUN_CE
TUN_DI
TUN_CLK
TUN_DO
TUN_L
VCC_9V
TUN_R
TUN_SM
FM_DET
A_GND
ICT21
LC72723
RDS DECODER
+5V
+9V
QT21
MPXIN
VDDA
VDDD
RDS_DATA
RDS_CLK
RDS_RDY
RDS_RST
RD_RDY
RDCL
RDDA
RST
4.332
MHz
XT21
X_IN
X_OUT
DIG_FUNC
R
L
LOUT
A3.3V
ROUT
16MOUT
LRCK
BCK
DATA
L_C
TUNER
GP351TZ
IC4
DIGITAL
OUT
VCONT
REV
FWD
VO5-
VO5+
VO3-
VO3+
VO4-
VO4+
FD0
TDO
+5V
VDD
VVDD
MUTING
Q82
Q2
+7.9V
LID_SENS
VDD5
CONT5
SLDO
SPDO
TIN2
TIN1
FIN2
FIN1
RVDD
XVDD
-
OUT2
OUT1
VCC
IC2
LA6574H
FOCUS/
TRACKING/
DRIVER
SW4
PICKUP IN
M
M
M801
SLED
MOTOR
M802
SPINDLE
MOTOR
IC1
LC78646E
CD SERVO
+3.3V
SPIN/SLED
REG
IN
IC3
LM358D
OP-AMP.
VCC
DATA
BCK
LRCK
16MOUT
CONT3
CONT2
VCONT
FD0
TD0
VREF
LDD
PD
ADAVDD
LVDD
RFVDD
XOUT
XIN
XL1
16.9344
MHz
Q1
LASER DRIVER
+3.3V
M
-
+
Q3
CONSTANT
VOLTAGE
VREF
-
+
+
IC101
CS4340KS
DAC IC
FOCUS
COIL
TRACKING
COIL
PICK
UP
UNIT
CD_WRQ
CD_DRF
CD_CE
CD_DO
CD_DI
CD_CLK
CD
RES
CE
CLK
CLK
DI
DO
WRQ
RES
DRF
DO
WRQ
RES
DRF
1
65
8
19
14
11
26
66
37
8
40
43
44
18
33
32
34
31
25
24
23
22
10
24
9
79
49
3
4
4
20
19
18
51
12
1
6
4
5
22
23
23
20
7
61
7 6
41
64
39
3
69
2 3 4
2
5
4
3
6
71
50
7
10
3 11
27
2
3
3
67
48
57
68
54
8
26
75
46
47
19
5
13
14
16
15
4
14
30
21
29
13
60
15
17
28
11
22
56
2
1
59
2
1
80
63
21
11
5
2
8 9
11
21
25
28
15
12
12
8
9
9
8
10
70
62
38
77
55
28
27
26
58
1
2
4
3
72
10
1 7
5
H/P_SW
S-MUTE
7 16
M1
CD DOOR
MOTOR
+7.9V
-5.6V
+9V
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