Sony HCD-RG55 / HCD-RG55S / MHC-RG55 / MHC-RG55S Service Manual ▷ View online
3
Pin No.
Pin Name
I/O
Description
80
CD U/D SW
I
CD BU up/down switch signal input
81
STEREO
I
Stereo tuning signal input
82
TUNED
I
Tuning a frequency signal input
83
TAPE PHOTO
I
A deck photo sensor singanl input
SENSOR-A
84
TAPE PHOTO
I
B deck photo sensor singanl input
SENSOR-B
85
REMCON IN
I
Data input from the remote control receiver
86
VR ENCODER B
I
Volume signal input from the rotary encoder
87
VR ENCODER A
I
Volume signal input from the rotary encoder
88
CD OPEN
I
CD tray open switch signal input
89
VSS
—
Ground pin
90
VDD
—
Power supply pin (+5 V)
91
PT8300-A LATCH
O
Latch signal output to the I/O expander
92
PT8300-B LATCH
O
Latch signal output to the I/O expander Not used. (open)
93
LC72131 CE
O
Chip enable signal output to the PLL tuner IC
94
M61519 CLOCK
O
Clock output to the sound processor
95
LC72131,PT8300-AB,
O
Data output to the PLL tuner IC, the I/O expander and the sound processor
M61519 DATA
96
LC72131 DATA IN
I
Data input from the the PLL tuner IC
97
LC72131,PT8300
O
Clock output to the PLL tuner IC and the I/O expander
CLK
98
COIN
O
CD command data signal output
99
SQOUT
I
CD subcode Q signal input
100
SQCK
O
CD command clock signal output
HCD-RG55/RG55S
5
5
HCD-RG55/RG55S
: FM
: CD
• Signal Path
: DIGITAL OUT
• R-CH is omitted due to same as L-CH.
A
MAIN
SECTION
D
MAIN
SECTION
C
SECTION
B
MAIN
SECTION
MAIN
SECTION
E
RDS DATA
10
RDS CLK
29
CE
93
CLK
97
DATA
95
DATA IN
96
STEREO
81
TUNED
82
MASTER CONTROL
IC801(1/3)
DO
CL
CE
DI
L-CH
TBL ADDRESS
SENSOR
79
CD SENSOR
IC711
80
PIC UP/DOWN SW
88
OPEN SW
4
CLOSE SW
(OPEN/CLOSE)
S701
(UP/DOWN)
S711
FM 75Ω
G
AM
JK101
ANT IN
8
1
IF OUT
3
OSC OUT
4
VT
FE101
EXCEPT AEP,UK
ANT IN
1
7
IF OUT
5
VT
FE101
AEP,UK
+B
TU+12V
Q102
FM
10
FM OSC
16
A OUT
20
A IN
19
PD
18
PLL
IC102
7
FM
12
FM/AM IF
8
IF REQ
6
DO
4
DI
5
CL
3
CE
XIN
1
XOUT
22
X101
4.5MHz
RF IF
AMP
AMP
Q101
CF101
CF102
DO
DI
CL
CE
2
1
5
10
7
6
11
12
RB101
2
AM MIX OUT
AM/FM
11
IF REQ MUTE
10
AM RF IN
21
AM OSC
23
REQ
3
FM IF
1
AM/FM IF MPX
IC101
13
L OUT
14
R OUT
MUTE
Q103
4
AM IF IN
IFT101
R-CH
6
TUNED
7
STEREO
24
OSC FM SD
RV101
DI
JR111
Q105
MUX
4
XO
14
XI
13
2
DATA
16
INT
RDS
IC103
AEP,UK
X102
4.332MHz
3
9
TU+12V
4
AFC
22
18
DECODER OUT
17
PLL IN
JR609
OPTICAL PICK-UP
BLOCK
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
CH1IN A
9
20
7
MUTE
CH1OUT A
M
M
M02
(SLED)
M01
(SPINDOL)
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
DATA
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 I/O
28
CLV+
12
CLV-
13
LIMIT SW
27
53
WRQ
55
SQOUT
3
PDO
45
XI
44
XO
X701
16.9344M
37
L CH
40
R CH
R-CH
58
RESET
D732
IC701
MOTOR
DRIVER
DRIVER
9
7
M
4
2
CD-L
2
1
38
SLOF
RF GAIN
24
4
D MUTE
26
Q774
Q771
MUTE
22
CD MOTOR+
21
CD MOTOR-
M721
(TURN)
CH1OUT B
CH4OUT A
CH4OUT B
CH2OUT B
CH2OUT A
CH3OUT B
CH3OUT A
CH1IN B
CH4IN A
CH2IN A
CH3IN A
31
D OUT
DIGITAL
OUT
(OPTICAL)
PH671
MUTE
18
IC804
MOTOR DRIVE
26
DI1
SL+
19
SL-
20
CD RESET
23
3
CLK
4
LATCH
16
DI2
15
DO1
14
CLK
13
LATCH
DI2
DO1
CLK
LATCH
LED601,602.604-608
6
12
MAIN
TU MUTE
WRQ
6
SQOUT
99
COIN
SQCK
100
CD RWC
5
CD DRF
8
DI2,DO1,CLK,LATCH
LATCH
91
CLOCK
94
DATA
CLOCK
98
2. BLOCK DIAGRAM — CD, TUNER SECTION —
(Page 6)
(Page 6)
(Page 6)
(Page 6)
(Page 6)
6
6
HCD-RG55/RG55S
: FM
: CD
• Signal Path
• R-CH is omitted due to same as L-CH.
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
D
CD,TUNER
SECTION
CD,TUNER
SECTION
B
CD,TUNER
SECTION
C
CD,TUNER
SECTION
E
CD,TUNER
SECTION
A
IC801(2/3)
SYSTEM CONTROL
BIAS
TRAP
TRAP
R-CH
BIAS
OSC
Q223
+12V
ERASE
HEAD
REC/PB
HEAD
R-CH
PB
HEAD
DECK-B
DECK-A
18
TAPE A STAT
83
PHOTO A
Q228
A IN(L)
32
DECK A/B SELECT
PB/REC EQ AMP
IC201
B IN(L)
34
REC OUT(L)
21
AMS
9
28
EQ OUT(L)
AMS
Q210-212
26
PB OUT(L)
24
REC IN(L)
L201
R-CH
Q219
Q221
Q221
Q224
BIAS
Q225
Q222
REC BIAS
REC MUTE
9
PB MUTE
12
A/B
8
15
REC MUTE ON/OFF
14
MUTE ON/OFF
13
A/B
IC601
SHIFT REGISTER
23
SOL A
BIAS
18
REC
20
19
TAPE B STAT
TAPE DECK
A HALF
MODE SW A
B HALF
MODE SW B
REC(FWD)
A PHOTO
84
PHOTO B
B PHOTO
A SOL DRIVE
Q601,602
SOL A
22
SOL B
B SOL DRIVE
Q603,604
SOL B
24
MECHA VCC
M+B CONT
Q605,606
CAP M+
L
R
GAME
INPUT
INPUT
R-CH
VIDEO OUT
JK803
JK602
19
STK MUTE
17
SP RELAY(F)
6
CD POWER
3
SYS MUTE
L-CH
IC301
IN2A
40
IN2B
39
REC OUT2
35
1
REF
DATA
21
CLOCK
22
IN2D
37
SOUND PROCESSOR
Q363
MUTE
POWER AMP
IC501
1
2
12
6
7
Q361,362
MUTE CONT
Q581
MUTE
Q381,382
PROTECT
DETECT
D502
Q301
MUTE
D362
Q503,504
MUTE CONT
Q383
PROTECT
CONT
Q386
PROTECT
SWITCH
Q387
PROTECT
SWITCH
2
1
IC304(1/2)
JK801
PHONES
R CH
R CH
L
L
RY371
R
R
JK302
SPEAKER
Q501
OVER LOAD
DETECTOR
Q384,385
RELAY
DRIVE
HIGH
FREQ
FREQ
D801,802
P01
P30
G01
G13
FLOURESCENT
INDICATOR TUBE
IC801(3/3)
SYSTEM CONTROL
F1
F2
FUNCTION
KEY
VP ENCODER A
87
VR ENCODER B
86
REMOCON
85
VOLUME
ENCODER
X801
32.768MHz
FLD801
42
30
KEY INPUT1
26
12 XT1
13
PROTECT SENSOR
77
HEADPHONE SENSOR
78
FUNCTION
KEY
KEY INPUT0
25
S801-812
FUNCTION
KEY
KEY INPUT2
27
S814-826
REMOTE
CONTROL
RECEIVER
RM601
T911
MAIN TRANS
VF2
VF1
RESET
1
3
IC803
D824
D817
S827-838
1
PWR LED
LED603
D541
PROT
+B
-B
POWER
AMP
Q911
-30V SW
D901-904
+5.6V
REG
1
3
IC901
T901
SUB TRANS
43
45
47
.
50
52
.
71
73
73
.
75
VACS
20
SPEANA H
21
1
2
EVER
+5.6V
+5.6V
51
VPP
15 CF1
16
RES801
10MHz
XT2
CF2
D911
-30V
D542
D543
+12V
REG
3
1
IC683
TU +12V
+12V
UNREG
D681-684
+5.6V
REG
3
1
IC682
+5.6V
Q681
Q682
+5V
REG
3
1
IC681
A +5V
+7V
REG
3
1
IC684
+7V
D687-690
D691
D692
D692
EVER +5.6V
MIC
JK802
MIC
LEVEL
VR801
IC802
(1/2)
IC802
(2/2)
3
2
1
6
5
7
IC503
SUB WOOFER AMP
IC304
(2/2)
7
5
IC302
(1/2)
1
3
IC302
(2/2)
7
5
Q801
LIMITER
R-CH
L-CH
JK301
AUDIO
VIDEO
MUTE
10
TU MUTE
23
ALC(L)
DO2
25
DI1
26
CLK
3
LATCH
4
DI2,DO1,CLK,LATCH
DI2
DO1
CLK
LATCH
REC(REW)
DATA,CLOCK
IN2C
38
MIC
2
IN2E
36
CD-L
DATA
CLOCK
25
OUT2
Q631
DBFB
D631
Q365
MUTE CONT
STK MUTE
Q511
D383
D518
FAN961
FAN
DRIVE
Q371
MUTE
Q304
MUTE
Q505
RELAY
DRIVE
Q389
RY373
Q582,583
OVER HEAT
DETECTOR
+B
TH501
Q584
FAN SW
19
SA OUT
24
SW OUT
VR802
VOLUME
MID/HIGH
FREQ
D803,804
MID
FREQ
D805,806
LOW
FREQ
D807,808
SPEANA M/H
22
SPEANA M
23
SPEANA L
24
11
RESET
RESET
SWITCH
Q809
28
PWR DOWN
2
P.S RELAY
µCOM +B
D822
FAN +B
AC
IN
RELAY
DRIVE
DRIVE
Q901
RY901
S901
JW911
JW912
VOLTAGE
SELECTOR
SP,AUS
SP
AEP,UK.SP
E2,E51,SP,
AR,KR
AR,KR
220V
230-240V
120V
220V
230-240V
120V
JW6
F919
JW7
AUS
AEP/UK
MD(VIDEO)
IN
EXCEPT AEP,UK
AEP,UK
7
12
6
-B SWITCH
Q512,513
CN311
SUB WOOFER
CONTROL
JK303
SUB WOOFER
OUT
-B
(-30V)
3. BLOCK DIAGRAM — MAIN SECTION —
(Page 5)
(Page 5)
(Page 5)
(Page 5)
(Page 5)
6
6
HCD-RG55/RG55S
: FM
: CD
• Signal Path
• R-CH is omitted due to same as L-CH.
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
D
CD,TUNER
SECTION
CD,TUNER
SECTION
B
CD,TUNER
SECTION
C
CD,TUNER
SECTION
E
CD,TUNER
SECTION
A
IC801(2/3)
SYSTEM CONTROL
BIAS
TRAP
TRAP
R-CH
BIAS
OSC
Q223
+12V
ERASE
HEAD
REC/PB
HEAD
R-CH
PB
HEAD
DECK-B
DECK-A
18
TAPE A STAT
83
PHOTO A
Q228
A IN(L)
32
DECK A/B SELECT
PB/REC EQ AMP
IC201
B IN(L)
34
REC OUT(L)
21
AMS
9
28
EQ OUT(L)
AMS
Q210-212
26
PB OUT(L)
24
REC IN(L)
L201
R-CH
Q219
Q221
Q221
Q224
BIAS
Q225
Q222
REC BIAS
REC MUTE
9
PB MUTE
12
A/B
8
15
REC MUTE ON/OFF
14
MUTE ON/OFF
13
A/B
IC601
SHIFT REGISTER
23
SOL A
BIAS
18
REC
20
19
TAPE B STAT
TAPE DECK
A HALF
MODE SW A
B HALF
MODE SW B
REC(FWD)
A PHOTO
84
PHOTO B
B PHOTO
A SOL DRIVE
Q601,602
SOL A
22
SOL B
B SOL DRIVE
Q603,604
SOL B
24
MECHA VCC
M+B CONT
Q605,606
CAP M+
L
R
GAME
INPUT
INPUT
R-CH
VIDEO OUT
JK803
JK602
19
STK MUTE
17
SP RELAY(F)
6
CD POWER
3
SYS MUTE
L-CH
IC301
IN2A
40
IN2B
39
REC OUT2
35
1
REF
DATA
21
CLOCK
22
IN2D
37
SOUND PROCESSOR
Q363
MUTE
POWER AMP
IC501
1
2
12
6
7
Q361,362
MUTE CONT
Q581
MUTE
Q381,382
PROTECT
DETECT
D502
Q301
MUTE
D362
Q503,504
MUTE CONT
Q383
PROTECT
CONT
Q386
PROTECT
SWITCH
Q387
PROTECT
SWITCH
2
1
IC304(1/2)
JK801
PHONES
R CH
R CH
L
L
RY371
R
R
JK302
SPEAKER
Q501
OVER LOAD
DETECTOR
Q384,385
RELAY
DRIVE
HIGH
FREQ
FREQ
D801,802
P01
P30
G01
G13
FLOURESCENT
INDICATOR TUBE
IC801(3/3)
SYSTEM CONTROL
F1
F2
FUNCTION
KEY
VP ENCODER A
87
VR ENCODER B
86
REMOCON
85
VOLUME
ENCODER
X801
32.768MHz
FLD801
42
30
KEY INPUT1
26
12 XT1
13
PROTECT SENSOR
77
HEADPHONE SENSOR
78
FUNCTION
KEY
KEY INPUT0
25
S801-812
FUNCTION
KEY
KEY INPUT2
27
S814-826
REMOTE
CONTROL
RECEIVER
RM601
T911
MAIN TRANS
VF2
VF1
RESET
1
3
IC803
D824
D817
S827-838
1
PWR LED
LED603
D541
PROT
+B
-B
POWER
AMP
Q911
-30V SW
D901-904
+5.6V
REG
1
3
IC901
T901
SUB TRANS
43
45
47
.
50
52
.
71
73
73
.
75
VACS
20
SPEANA H
21
1
2
EVER
+5.6V
+5.6V
51
VPP
15 CF1
16
RES801
10MHz
XT2
CF2
D911
-30V
D542
D543
+12V
REG
3
1
IC683
TU +12V
+12V
UNREG
D681-684
+5.6V
REG
3
1
IC682
+5.6V
Q681
Q682
+5V
REG
3
1
IC681
A +5V
+7V
REG
3
1
IC684
+7V
D687-690
D691
D692
D692
EVER +5.6V
MIC
JK802
MIC
LEVEL
VR801
IC802
(1/2)
IC802
(2/2)
3
2
1
6
5
7
IC503
SUB WOOFER AMP
IC304
(2/2)
7
5
IC302
(1/2)
1
3
IC302
(2/2)
7
5
Q801
LIMITER
R-CH
L-CH
JK301
AUDIO
VIDEO
MUTE
10
TU MUTE
23
ALC(L)
DO2
25
DI1
26
CLK
3
LATCH
4
DI2,DO1,CLK,LATCH
DI2
DO1
CLK
LATCH
REC(REW)
DATA,CLOCK
IN2C
38
MIC
2
IN2E
36
CD-L
DATA
CLOCK
25
OUT2
Q631
DBFB
D631
Q365
MUTE CONT
STK MUTE
Q511
D383
D518
FAN961
FAN
DRIVE
Q371
MUTE
Q304
MUTE
Q505
RELAY
DRIVE
Q389
RY373
Q582,583
OVER HEAT
DETECTOR
+B
TH501
Q584
FAN SW
19
SA OUT
24
SW OUT
VR802
VOLUME
MID/HIGH
FREQ
D803,804
MID
FREQ
D805,806
LOW
FREQ
D807,808
SPEANA M/H
22
SPEANA M
23
SPEANA L
24
11
RESET
RESET
SWITCH
Q809
28
PWR DOWN
2
P.S RELAY
µCOM +B
D822
FAN +B
AC
IN
RELAY
DRIVE
DRIVE
Q901
RY901
S901
JW911
JW912
VOLTAGE
SELECTOR
SP,AUS
SP
AEP,UK.SP
E2,E51,SP,
AR,KR
AR,KR
220V
230-240V
120V
220V
230-240V
120V
JW6
F919
JW7
AUS
AEP/UK
MD(VIDEO)
IN
EXCEPT AEP,UK
AEP,UK
7
12
6
-B SWITCH
Q512,513
CN311
SUB WOOFER
CONTROL
JK303
SUB WOOFER
OUT
-B
(-30V)
3. BLOCK DIAGRAM — MAIN SECTION —
(Page 5)
(Page 5)
(Page 5)
(Page 5)
(Page 5)
