Read Sony HCD-GX20 / MHC-GX20 Service Manual online
20
20
HCD-GX20
5-2. Block Diagrams
TUNER Section
: CD
• Signal Path
• R-CH is omitted due to same as L-CH
OPTICAL PICK-UP
BLOCK
(KSM-213D)
LD
DRIVER
Q731
+5V
LD
GND
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
IC781
FCS/TRK COIL,
SL/SP MOTOR
SL/SP MOTOR
DRIVER
SLED/SPINDLE SERVO,
RF AMP
IC731
1
25
2
27
26
VR
PD
11
12
18
17
3
9
20
7
MUTE
CH1OUT-A
CH1IN-A
CH1IN-B
CH4IN-A
CH2IN-B
CH3IN-B
CH1OUT-B
CH4OUT-A
CH4OUT-B
CH2OUT-B
CH2OUT-A
CH3OUT-B
CH3OUT-A
M
M
M02
(SLED)
M01
(SPINDLE)
S01
(LIMIT)
41
RF SM
VR
58
VCC
VC
A
B
C
D
E
F
DETECTOR
FOCUS/TRACKING/
FIN 1
FIN 2
E
3
F
4
LDD
62
LDS
63
FD
16
TO
15
SLD
29
SPD
27
52
DAT
50
CLK
51
CL
53
CE
34
TGL
54
DRF
39
CV-
40
CV+
Q775
30
SL-
31
SL+
35
TOFF
44
SLI
49
DEF
36
TES
37
HFL
33
JP+
32
JP-
DIGITAL SIGNAL
PROCESSOR
IC751
EFMI
10
EFMO
9
DEF
1
TES
16
HFL
15
JP+
19
JP-
20
COIN
56
4.2M
61
CQCK
57
RWC
54
TGL
18
TOFF
17
SHUTER IN/OUT
28
CLV+
12
CLV-
13
LIMIT SW
27
53
WRQ
55
SQOUT
3
PDO
45
XIN
44
XOUT
X701
16.9344MHz
37
LCHO
40
RCHO
R CH
58
RES
CD CHANGER
CONTROL
IC601 (1/3)
69
99
WRQ
SQOUT
COIN
98
CD RESET
76
SQCK
100
CD RWC
6
CD DRF
68
CD SLED(+)
74
CD SLED(-)
75
D732
IC701
MOTOR
DRIVER
DRIVER
9
7
M
4
2
71
CD NUMBER SENSOR
70
CD BUSY
(PIC UP/DOWN)SW
80
CD OPEN
TABLE
SENSOR
IC711
S701
A
MAIN
SECTION
CD-L
2
1
38
SLOF
RF GAIN
24
4
D_MUTE
26
Q774
MUTE
Q771
73 CD MUTE
67
CD CLOSE
4
CD MOTOR+
5
CD MOTOR-
M721
(TURN)
S711
UP/DOWN
OPEN/CLOSE
Ver 1.3 2003.11
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