Sony HCD-GX355 / HCD-GX555 / HCD-RG270 / HCD-RG475 / HCD-RG575 / MHC-GX355 / MHC-GX555 / MHC-RG270 / MHC-RG475S / MHC-RG575S Service Manual ▷ View online
HCD-GX355/GX555/RG270/RG475/RG575
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21
HCD-GX355/GX555/RG270/RG475/RG575
6-1. BLOCK DIAGRAM – CD SERVO Section –
SECTION 6
DIAGRAMS
SWITCHING
IC501
(MX)
(EXCEPT MX)
52 – 54
MIACK
8
PO11/BUCK/AD14
36
MILP
5
RESET
2
MICS
4
MIDIO
6
MICK
7
9
RIN
4
OUT1
2
OUT2
M751
(LOADING)
M
LOADING MOTOR DRIVE
IC701
7
FIN
MP3 DECODER
A/D
CONVERTER
CH2OUTF
CH2OUTR
23
24
21
4
5
5
7
17
18
16
15
RFACI
ASYO
ASYI
FILTER
FILO
PCO
CLTV
FILI
DIGITAL PLL
ASYMMETRY
CORRECTOR
EFM
DEMODULATOR
CD DSP
IC101 (1/2) (EXCEPT MX)
IC101 (1/2) (MX)
IC101 (2/2) (EXCEPT MX)
IC101 (2/2) (MX)
IC251 (EXCEPT MX)
IC251 (MX)
IC301 (EXCEPT MX)
IC301 (MX)
MDP
DIGITAL
CLV
PROCESSOR
32K
RAM
ERROR
CORRECTOR
INTERNAL BUS
SQCK
SQSO
EXCK
AOUT1
C4M
XTSL
XTAO
XTAI
AOUT2
R-CH
D/A
DIGITAL
INTERFACE
D/A
CONVERTER
SELECTOR
CLOCK
GENERATOR
SUBCODE
PROCESSOR
SCOR
SCOR
WFCK
XUGF
GFS
EMPH
SENS
DATA
CLOCK
XLAT
SBSO
EXCK
WFCK
SBSO
I-CD-SENS
O-CD-DATA
O-XLT
TEI
FEI
FOCUS/
TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
CH3FIN
CH4IN
CH3RIN
CH3OUTF
CH3OUTR
CH1FIN
CH1RIN
CH2FIN
CH2RIN
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
SSTP
COUT
MIRR,
DFCT, FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
SCLK
TO CPU INTERFACE
FOK
MIRR
DFCT
2
OPIN+
CH4OUTF
CH4OUTF
27
OPOUT
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
COIL
DRIVE
CH1OUTF
CH1OUTR
COIL
DRIVE
M
M
M102
(SLED)
MOTOR/COIL DRIVE
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
CD DSP
• SIGNAL PATH
: CD PLAY
: VIDEO
14
13
11
12
I-SCOR
A
CD-L
B
SCOR, SBSO,
EXCK, WFCK
STANDBY
13
11
12
9
10
14
119
108
21 23
3
1
2
7
TO SERVO AUTO
SEQUENCER
42
51 53
XPCK
112
50 52
45
46
6
XRST
100
O-XRST
47
96 97
81
78
117
93
77
86
98 99
115
107
102 105 104
110 111 113 68
31
O-CD-CLK
33 45
LRCK
BCK
PCMD
LRCKIA
SDI0
63 66 65
16
BCKIA
15
SFSY/LRCKIB
19
SBSY/BCKIB
18
14
LRCKI
BCKI
PCMDI
SDO0
62 60 61
11
32 19
3
26
27
28
29
24
22
20
19
37
36
E
B
A
CD +3V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR
AMP
TRACKING
ERROR AMP
RFACO
FEO
TEO
E
F
AUTOMATIC
POWER
CONTROL
Q10
APC LD
AMP
LD
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-215DCP)
PD
I-V AMP
D
C
EQ_
IN
41
35
34
EQ
AC_
SUM
RFAC
VCA
X171
16.9344MHz
SYSTEM CONTROLLER
IC901 (1/4)
S101
(LIMIT)
I-MP3-DI 29
O-MP3-DATA 30
O-MP3-CLK 28
O-MP3-CS 39
I-MP3-ACK 40
I-MP3-REQ 43
O-MP3-LP 44
O-XTCN 34
O-MP3-RESET 38
O-MP3-STB 42
• R-ch is omitted due to same as L-ch.
XTACN
95
48
O-LM-R
49
O-LM-F
9
RIN
4
OUT1
2
OUT2
M741
(TABLE)
M
TABLE MOTOR DRIVE
IC712
7
FIN
50
O-TM-R
51
O-TM-F
73
I-CD-NUMBER-SENS
I-E-1 – I-E-3
56
I-OPEN-SW
S751
OPEN/CLOSE
DETECT
OPEN
CLOSE
LEVEL SHIFT
Q731
TABLE ADDRESS
SENSOR
IC731
ROTARY
ENCODER
S711
DISC TRAY
ADDRESS DETECT
• Abbreviation
MX : Mexican model
(Page 22)
(Page 22)
Ver. 1.1
HCD-GX355/GX555/RG270/RG475/RG575
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HCD-GX355/GX555/RG270/RG475/RG575
6-2. BLOCK DIAGRAM – AUDIO/VIDEO Section –
INPUT SELECT,
TONE CONTROL,
ELECTRICAL VOLUME
IC101
58
MIC
HP/AUX IN
MIC IN
37
TONE OUT1
15
REC OUT1
33
VOL OUT1
35
BBIN1
25
SW OUT
VOL OUT1
DBFB
R-CH
SW OUT
19
SI
1 CD L
61 TUNER L
3 TAPE L
9 TAPE A1
7 PB OUT1
11 TAPE B1
63 MD L
3 DATA
5 SFSY
4 SBSY
2 CLCK
52
DEN
SBSO
WFCK
SCOR
EXCK
CDG/_BGC
36 VIN1
CD-L
A
HP IN
E
•
SIGNAL PATH
: CD PLAY
: TAPE PLAY (DECK-A)
: REC
• R-ch is omitted due to same as L-ch.
: TAPE PLAY (DECK-B)
: TUNER
: AUX IN
: MIC
: VIDEO
CE
TUNED
STEREO
DO
DI
CLK
40
AMS OUT
BAND-PASS
FILTER
Q111, 112
FEED BACK
SWITCH
Q141
55
SAOUT1
18
SC
66
I-LC72121-DI
65
O-LC72121-CLK
68
O-LC72121-CE
69
I-TUNED
70
I-STEREO
90
O-REC/PB
91
O-BIAS
67
O-LC72121-DO
TU-MUTING
71
O-ST-MUTE
R-D
R-C
72
I-RDS-DATA
18
I-RDS-CLK
MIC IN
HP/AUDIO IN
82
I-MIC
81
I-HP/AUDIO IN
92
I-TAPE-AMS
93
I-STREAM
94
I-VACS
D923
D921
1
O-BD3401-DATA
2
O-BD3401-CLK
87
O-B-SOL
86
O-A-SOL
85
O-MOTOR
63
O-VMUTE
60
I-CDG-DET
59
I-CDG-BGC
57
I-CDG-MUTE-DATA
58
0-CDG-RST
CAPSTAN/REEL
MOTOR DRIVE
Q341, 342
PLUNGER DRIVE
(DECK-A)
Q345, 346
M
M
(CAPSTAN/REEL)
(DECK-A)
(DECK-B)
PLUNGER DRIVE
(DECK-B)
Q343, 344
A-HALF
A-MODE
REC (REW)
A-PHOTO
B-PHOTO
I-REEL-A
I-REEL-B
88
83
84
I-TAPE-A-STAT
B-HALF
B-MODE
REC (FWD)
89
I-TAPE-B-STAT
SYSTEM CONTROLLER
IC901 (2/4)
TAPE MECHANISM
DECK BLOCK
• Abbreviation
AR : Argentine model
E2 : 120V AC Area in E model
E51 : Chilean and Peruvian models
EE : East European model
MX : Mexican model
E2 : 120V AC Area in E model
E51 : Chilean and Peruvian models
EE : East European model
MX : Mexican model
FM/AM TUNER PACK
AM
FM ANT
AM ANT
TUNER-L
TUNER-R
LC72121 CE
CE
R-CH
ANT GND
ANT GND
TUNED
TUNED
STEREO
STEREO
TU MUTE
TU-MUTING
LC72121 DI
DO
LC72121 DO
DI
LC72121 CLK
CLK
RDS DATA
R-D
RDS CLK
R-C
FM 75
Ω
COAXIAL
BIAS OSC
L201
REC BIAS
SWITCH
Q231, 232
+9V
BIAS OSC
Q201
PB MUTING
Q209
REC MUTING
Q205, 207
ERASE
HRPE1
(REC/PB/ERASE)
(DECK-B)
HP1
(PB)
(DECK-A)
L-CH
R-CH
R-CH
R-CH
Q203
L-CH
R-CH
R-CH
(AEP, UK, EE)
(AEP, UK, EE)
R-CH
J751
AUDIO IN
R-CH
+9V
JK801
MIC 1
JK802
MIC 2
VR801
MIC LEVEL
VR851
ECHO LEVEL
JK802
MIC
(E2, E51, AR)
(E2, E51, AR)
(MX)
(MX)
(MX)
(MX)
MUTING
Q801
MIC AMP
IC801 (1/2)
ECHO AMP
IC802
MIC AMP
IC801 (2/2)
SCHMIT
TRIGGER
IC1005
13 WE
D
C
G
B
37
GDET
44
VOUT
CDG-DET
VMUTE
6
MUTE
MUTE_DATA
CD GRAPHICS
DECODER
IC1001
D-RAM
IC1002
IC1002
LEVEL SHIFT
Q1005, 1009
VIDEO AMP
IC1006
54
RESET
DQ1 – DQ4
A0 – A7
VD0 – VD3
VA0 – VA7
CDG-RST
LEVEL SHIFT
Q1002, 1006
VIDEO MUTING
Q1010
CDG/_BGC
CDG-DET
VMUTE
MUTE_DA
TA
CDG-RST
25, 27, 29, 30
15 – 22
1, 2, 24, 25
9 – 12, 14 – 17
WE 3
28 OE
OE 22
14 RAS
RAS 4
26 CAS
CAS 23
NTSC/PAL
SWITCH
Q1001
J803
VIDEO OUT
X1002
14.31818 MHz
59
60
XI1
XO1
(GX555/RG475/RG575)
(Page 23)
(Page 21)
(Page 21)
(Page 23)
(Page 23)
(Page 23)
Ver. 1.1
HCD-GX355/GX555/RG270/RG475/RG575
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HCD-GX355/GX555/RG270/RG475/RG575
6-3. BLOCK DIAGRAM – AMP Section –
I-PROTECTOR
95
O-STK-MUTE
24
O-SWR
25
OVER LOAD
DETECT
Q441
PROTECT
DETECT
Q487
RELAY SWITCH
Q488
TEMPERATURE
DETECT
Q483, 484
TH441
R-CH
R-CH
VOL OUT1
R-CH
• SIGNAL PATH
• R-ch is omitted due to same as L-ch.
: TUNER
D035
M001
(FAN)
(FAN)
J701
PHONES
FRONT SPEAKER
IMPEDANCE
USE 6 – 16
Ω
SUB WOOFER OUT
IMPEDANCE
USE 6 – 16
Ω
+
–
–
–
+
R
L
R-CH
R-CH
RY B+
JK441
+
–
–
JK501
RY441
RY501
PROTECTOR
Q485
DC DETECT
Q481, 482
RELAY DRIVE
Q502
FAN ON/OFF
Q044
FAN DETECT
Q045
RELAY DRIVE
Q486
TEMPERATURE
DETECT
Q503, 507
OVER LOAD
DETECT
Q501
DC DETECT
Q505, 506
STANDBY
SWITCH
Q489
AMP ON/OFF
Q933
MUTING
Q251
BUFFER
Q271
BUFFER
IC251
MUTING
CONTROL
Q261
+
R-CH
+
+
+
+
POWER
AMP
IC441
POWER
AMP
IC501
M
M
SYSTEM CONTROLLER
IC901 (3/4)
R-CH
+
+
+
O-SYS-MUTE
23
SUB WOOFER
ON/OFF
Q274
(GX555/RG475/RG575)
(GX555/RG475/RG575)
(GX555/RG475/RG575)
C
DBFB
G
SW OUT
D
HP IN
E
(Page 22)
(Page 22)
(Page 22)
(Page 22)
HCD-GX355/GX555/RG270/RG475/RG575
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HCD-GX355/GX555/RG270/RG475/RG575
6-4. BLOCK DIAGRAM – PANEL, POWER SUPPLY Section –
7
74 I-KEY0
97 I-POWER, DISPLAY
REMOTE CONTROL
RECEIVER
IC610
S601, 602
6
I-VOL-A
21 I-VOL-B
ROTARY
ENCODER
VOLUME
STANDBY
S660
8
SI1
SO1
7
SCK1
36 I-VFD-DATA
35 O-VFD-DATA
37 O-VFD-CLK
16
CE
6
RESET
4
O-VFD-CE
3
O-VFD-RESET
FL701
FLUORESCENT
INDICATOR
TUBE
LED DRIVE
Q601 – 606
D601 – 606
(FRONT PANEL LED)
32 SW LED
FL/LED DRIVER
IC701
SYSTEM CONTROLLER
IC901 (4/4)
9
I-SIRCS-IN
F906
MAIN POWER
TRANSFORMER
PT901
SUB POWER
TRANSFORMER
PT902
RELAY DRIVE
Q002
RECT
D902 – 905
REGULATOR
Q903, 904
RECT
D007, 008
RECT
D001 – 004
+3.3V
REGULATOR
IC006
+3.3V
UNREG
VF2
D006
Q902
D908
D301, 302
W001
(AC IN)
RY901
B+ SWITCH
Q041, 042
68 – 80
G1 – G13
26 – 31
STREAN LED1
– STREAN LED6
– STREAN LED6
S1 – S21
S611 – 617,
S621 – 626,
S631 – 638,
S641 – 648,
S621 – 626,
S631 – 638,
S641 – 648,
SW601
19 – 22
KEY1 – KEY4
26
O-POWER-RELAY
5
I-AC-CUT
12
I-RESET
VOLTAGE DETECT
IC902
RESET SWITCH
Q901
D902
D903
S901
120V
220V
240V
(EXCEPT E2, E3, E51, EA)
(GX555/RG475/RG575)
(MX)
(EXCEPT E2, E3, E51, EA)
(E2, E3, E51, EA)
F907
RECT
D011 – 014
RECT
D021 – 024
F904
F905
RECT
D401
D401
VOLTAGE
SELECTOR
B–
REGULATOR
Q902
VP
+1.5V
REGULATOR
IC303 (EXCEPT MX)
IC303 (MX)
MP3 +1.5V
EVER +10V
VCC
VREF, VDD
+9V
REGULATOR
IC011
+9V
+16V
RY B+
FAN B+
+5V
REGULATOR
IC1003
CDG +5V
+9V
REGULATOR
IC021
M+9V
M+7V
REGULATOR
Q043
61
O-CDG-POWER
20
I-AC-PULSE
27
O-FRONT-SP-RELAY
VF1
AMP B–
AMP B+
B+ SWITCH
Q1007, 1008
• Abbreviation
E2 : 120V AC Area in E model
E3 : 240V AC Area in E model
E51 : Chilean and Peruvian models
EA : Saudi Arabia model
MX : Mexican model
E3 : 240V AC Area in E model
E51 : Chilean and Peruvian models
EA : Saudi Arabia model
MX : Mexican model
45 – 58,
61 – 67
3
4
X701
4.19MHz
X1
X2
LED DRIVE
Q608
D608
(FRONT PANEL LED)
22 O-STBY-LED
D611
Ver. 1.1
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