Sony HCD-GN70V / MHC-GN70V Service Manual ▷ View online
HCD-GN70V
29
29
– TUNER/TAPE DECK SECTION –
TAPE L-CH
TEST
CONNECTOR
CN301
R-CH
R
L
C
MAIN
SECTION
(Page 30)
TUNER L – CH
E
MAIN
SECTION
(Page 30)
REC L-CH
D
MAIN
SECTION
(Page 30)
PB
HEAD
DECK-A
DECK-B
TC BLOCK
32
BIAS OSC
Q302, 303
RIPPLE
FILTER
Q301
A TRIG
DRIVE
• SIGNAL PATH
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
: RECORD
: TUNER (FM/AM)
R-CH
FM/AM TUNER UNIT
CN304
ANTENNA
ST-L
ST-R
ST-MUTE
STEREO
TUNED
ST-DOUT/MC-DIN
ST-DIN/MC-DOUT
ST-CLK
ST-CE
FM 75
Ω
COAXIAL
CAP M+
BTRGM+
ATRGM+
AHALF
BHALF
APLAY
BPLAY
BSHUT
ASHUT
ASHUT
REC(FWD)
REC(REV)
CAPM-CTRL
B-TRIG
A-TRIG
TC-RELAY
A-HALF
B-HALF
A-PLAY
B-PLAY
B-SHUT
A-SHUT
A-SHUT
A-REC, FWD
B-REC, REV
REC BIAS
PB-A/B
ALC
REC-MUTE
TC-MUTE
AMS-IN
AM
• R-ch is omitted due to same as L-ch.
93
EQ OUT1
A
B
120
ST-MUTE
STEREO
TUNED
TUNED
ST-DIN
ST-DOUT
ST-CLK
ST-CE
ST-CE
BIAS
TRAP
REC
BIAS(L)
34
1
2
3
4
28
27
26
24
21
56
53
54
51
52
63
60
66
90
89
61
68
91
67
55
59
B TRIG
DRIVE
58
CAP MOTOR
DRIVE
57
100
1
2
7
3
6
5
13
12
11
15
14
BUFFER
Q304,305
HPF
R-CH
PB OUT1
TAI1
REC IN1
MUTE
Q306,389
AMS DETECT
Q390, 398, 399
R-CH
R-CH
L – CH
R – CH
R-CH
R-CH
SW.P1
GND
SW.R1
AIN1
BIN1
RV304
REC(L)
LEVEL
RV301
C333, L301
TC +9V
REC/PB SWITCH
IC302
REC/PB
HEAD
ERASE
HEAD
A/B
NORM/HIGH SPEED
ALC ON/OFF
REC MUTE ON/OFF
MUTE ON/OFF
IC303
DECK A/B SELECT
PB/REC EQUALIZER AMP
IC301
Q307,310
T301
Q391, 392
Q395, 396
Q393,394
SYSTEM CONTROL
(CD/TAPE MECHANISM CONTROL)
IC501(2/4)
REC-OUT1
+
L – CH
R – CH
EQ
1
3
HCD-GN70V
30
30
– MAIN SECTION –
VCD L-CH
J117
A
To TUNER/TAPE
DECK SECTION
(Page 29)
To TUNER/TAPE
DECK SECTION
(Page 29)
To CD SERVO
SECTION
(Page 28)
To DISPLAY/POWER
SUPPLY SECTION
(Page 31)
D
TAPE L-CH
C
R-CH
VOLUME
CONTROL
CPU
INTERFACE
INPUT
SELECT
SWITCH
SURROUND OR
DPL BUFFER
MID/
BASS &
TREBLE
TREBLE
R-CH
R-CH
COMMAND
F OUT2
OUT1
VL
IN1
IN1
+
D130
Q101
R-CH
+
+
+
RV722
MIC AMP
IC722(2/2)
MUTE
Q201
INPUT SELECT SWITCH,
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
IC102
INC1
INEX1
IND1
L+R
SPEANA
DATA
CLK
EQIC-DAT
EQIC-CLK
BB-A1
BB-B1
SWOUT
NC
REC-L
R-CH
R-CH
R-CH
J721
L
R
MD/VIDEO
(AUDIO) IN
AUDIO
J730
AUDIO
OUT
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC501 (3/4)
VIDEO
SELECT
IC710
81
25
82
80
81
2
14
15
24
18
22
16
21
4
5
6
6
INA1
INB1
3
L
R
19
SURR EFFECT
SURR ON/OFF
VIDEO OUT
VCD-A-MUTE
AUDIO OUT
71
2
5
1
3
7
4
J601
VIN2
VIN1
VIN3
SW1
SW2
VOUT
VCD-VIDEO
L
R
NC
70
MIC
F
GUITAR AMP
IC722(1/2)
ECHO LEVEL
RV721
MIC LEVEL
TUNER L-CH
E
B
VIDEO
GAME
INPUT
17
8
MIC
RECB1
7
MIC OUT
VC
(+5V)
A+9V
C
A
B
B
C
A
B
B
+
1
8
DIGTAL
ECHO
IC721
LPF2
OUT
LPF1
IN
IN
+5V REG.
Q721
VC(+5V)
VC(+5V)
Q206,207
To TUNER/TAPE
DECK SECTION
(Page 29)
To CD SERVO
SECTION
(Page 28)
AUDIO OUT
ON/OFF
IC730
4
13
3
Q730
12
3
14
13
9
LOUT
R-CH
RIN
LIN
42
41
+
+
3D
FILTER
11
Q119
ROUT
BYPASS/
SURROUND
J716
VIDEO
OUT
VOL
S(2)
S(1)
EFFECT
SWITCH
SWITCH
3D SURROUND
AUDIO PROCESSOR
IC191
M891
(FAN)
(FAN)
+
-
-
-
-
+
+
+
FRONT SPEAKER
IMPEDANCE
USE 6–16
L
R
SURROUND
SPEAKER
IMPEDANCE
USE 24
L
R
PHONES
J631
RY501
D508
D509
VL (AC)
VL (AC)
R-ch is omitted due to same as L-ch.
TM501
D507
D511
FAN MOTOR
DRIVE
Q851, 852
FAN MOTOR
ON SWITCH
Q518
OVER LOAD
DETECT SWITCH
Q510
OVER LOAD
DETECT
Q501, 551
M
HEADPHONE MUTING
Q671, 624
MUTING CONTROL
SWITCH
Q652
RY502
+
+
TH502
Q602
TH501
+
D502
MUTING
Q620
MUTING CONTROL
SWITCH
Q650, 651
STANDBY
SWITCH
Q503, 504, 581
R-CH
R-CH
SIGNAL PATH
: TUNER (FM/AM)
: CD PLAY
: TAPE PLAY
: VIDEO/MD
: REC
: MIC INPUT
SURROUND
SPEAKER PROTECT
RELAY DRIVE
Q513, 515
FRONT SPEAKER
RELAY DRIVE
Q516, 517
POWER AMP
IC501
OVER CURRENT
PROTECTOR
IC502
RELAY
SWITCH
Q511
83
FRONT-RELAY
77
LINE-MUTE
84
LINK-RELAY
76
HP MUTE
50
HP DETECT
78
PROTECTOR
72
VACS IN
75
STK-MUTE
TEMPERATURE
DETECT SWITCH
Q505, 506
14
18
11
10
8
9
12
4
3
+
CT
OUT
1 OCP
2 VP
TEMPERATURE
DETECT SWITCH
Q514
(DC DETECT)
HCD-GN70V
31
31
FL601
FLUORESCENT
INDICATOR TUBE
8 – 10, 12 – 22,
24 – 41, 43 – 46
7 – 1, 100 – 95,
92 – 87
P1 – 36
1G – 13,
G16 – 21
64 – 66
SUPER LOW
FREQUENCY (BPF0)
FREQUENCY (BPF0)
2
BPF, RECT
IC101
BPF, RECT
IC102
67
70
1
2
7
6
69
68
48
93
72
94
BPF3
BPF1
BPF2
VKK
SELECTOR
G15
G15
G14
G14
G1 – 13, 16 – 21
6
1
7
80 VOL 1A
79 VOL 1B
ROTARY
ENCODER
S748
VOLUME
X
MAIN
SECTION
(Page 30)
F
SPEANA
P1 – 36
VF1
VF2
VF2
D610
D101
D102
-VG
(-32V)
X601
4MHz
83 X1
82 X0
52 – 59, 73
LED DRIVE
Q602 – 604,
Q1001 – 1006
D603, 605, 601
D1002, 1004, 1006
D1008, 1010, 1012
D1002, 1004, 1006
D1008, 1010, 1012
D602, 606, 604
D1001, 1003, 1005,
D1007, 1009, 1011
D1001, 1003, 1005,
D1007, 1009, 1011
M+9V
Q606
Q601
Q605
Q707
D748
KEY2
|
KEY0
S781 – 792
S765 – 772, 773
S751 – 763
S765 – 772, 773
S751 – 763
60
IIC DATA
MCU VCC
CN501
D+3.3V
IIC-CLK
IIC
PROGRAM
IIC-DATA
3
2
4
61
IIC CLK
77
RESET
30 IIC-DATA
29 IIC-CLK
49 GC-RESET
74 POWER-KEY
73 DISPLAY-KEY
S749
S750
DISPLAY
48 STBY-LED
4 SIRCS
X502
16MHz
15 X-IN
13 X-OUT
X501
32.768kHz
10 XC-IN
11 XC-OUT
23
VCD-POWER
SYSTEM CONTROLLER
IC501 (4/4)
27
STBY-RELAY
12
RESET
20
AC-CUT
B+ SWITCH
Q901, 902
RECT
D901
D901
+5V
REGULATOR
IC904
M +9V
M +7V
A +9V
TC +9V
D913 – 915
D502
D504
D501
D503
+3.9V
REGULATOR
IC903
+3.9V
REGULATOR
IC971
D +3.9V
+9V
REGULATOR
IC902
-33V
REGULATOR
Q903
+9V
REGULATOR
IC901
CD D+5V
CD A+5V
LEVEL
DETECT
IC601
D505
RECT
D909 – 912
RECT
D972 – 975
LED DRIVE
Q748
T972
SUB POWER
TRANSFORMER
RECT
D541
D541
RECT
D543
D543
+VL
VL(AC)
VL(AC)
VL(AC)
F974
VL
VL
VH
VH
VP
VF
VF
AC3
AC4
AC4
AC3
GND
F975
F976
F977
F978
R941
+VH
-VG
(-32V)
POWER ON/OFF
RELAY DRIVE
Q971
D977
RECT
RECT
VF1
VF2
RY971
AC IN
T910
MAIN POWER
TRANSFORMER
RESET
SWITCH
Q601
REMOTE CONTROL
RECEIVER
IC603
TO FLUORESCENT
INDICATOR TUBE
FL601
MCU VCC
VREF
EVER +3.9V
S901
S901
EXCEPT TH
TH
120V
|
220V
|
230 – 240V
DISPLAY CONTROL
KEY CONTROL
IC601
BUFFER
Q807, 808
D103
D104
BAFFER, RECT
Q100, D105
71 ALL_BAND
R952
VOLTAGE
SELECT
– DISPLAY/POWER SUPPLY SECTION –
HCD-GN70V
32
32
7-3.
PRINTED WIRING BOARD – BD SECTION –
•
See page 26 for Circuit Boards Location.
(SIDE A)
BD BOARD
12
(12)
1-684-174-
R234
R235
C151
IC103
CN102
Q101
R176
R111
C110
R109
R113
Q102
R102
R179
R123
R118
C213
R151
R236
IC102
R105
R103
R120
C107
DVC
TE
FE
R104
R124
R231
C118
R114
R152
R112
CN101
D101
SE
12
(12)
1-684-174-
(SIDE B)
BD BOARD
M101
SPINDLE
MOTOR
M
M102
SLED
MOTOR
M
30
16
15
1
OPTICAL PICK-UP
BLOCK
(A-MAX.3)
V
VIDEO
BOARD
(Page 34)
E
C165
C113
R227
C108
C115
R122
C114
C111
C101
R228
C120
C102
C166
C163
C182
C164
C117
C103
C153
R126
R229
R117
C109
C119
C104
C112
R125
RFAC
RFDC
DVC
E
1
28
+
–
56
29
+
–
2
3
4
5
6
7
8
A
1
B
C
D
E
Ref. No.
Location
D101
C-6
IC102
B-7
IC103
C-6
Q101
D-5
Q102
B-5
• Semiconductor
Location
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