Sony HCD-GN70V / MHC-GN70V Service Manual ▷ View online
HCD-GN70V
49
49
7-20. SCHEMATIC DIAGRAM – TRANS Board –
CN974
D975
D973
D972
D974
CN998
7P
CN976
4P
RY971
D971
C975
R975
C973
R974
C978
C977
C976
C971
JW920
T972
CN997
6P
JW928
JW929
R952
C941
D977
JW924
JW923
JW925
S901
JW912
JW911
JW913
JW914
T910
IC971
Q971
CN971
NO973
F976
F977
F974
F975
F978
R941
2P
VH
11ES2
11ES2
11ES2
11ES2
1SS133T
2200
16V
10k
100
16V
16V
100k
0.1
0.1
0.1
10000p
0.15
100
63V
11ES2
TA7804LS
+3.9V REG
2SC2785
1
*3
T8AL/250V
T8AL/250V
T6.3AL/250V
T6.3AL/250V
VOLTAGE SELECTOR
120V
220V
230-240V
POWER
TRANSFORMER
BUILT IN TRANSFORMER
NOT REPLACEABLE:
*
*
AC IN
*2 NO973
4P
2P
4P
2P
*3 CN971
RELAY DRIVE
POWER ON/OFF
EXCEPT TH
TH
EXCEPT TH
TH
TH
TH
EXCEPT TH
EXCEPT TH
TH
EXCEPT TH
EXCEPT TH
T4AL 250V
TH
POWER AMP
BOARD
(Page 47)
MAIN
BOARD
(3/3)
(Page 41)
MAIN
BOARD
(3/3)
(Page 41)
TH
EXCEPT TH
EXCEPT TH
EXCEPT TH
TH
TH
HCD-GN70V
50
50
7-21. IC Block Diagrams
IC103
CXA2581N-T4 (BD BOARD)
27
29
30
4
3
EQ_IN
9
D
10
F
E
8
C
7
B
6
A
AC_SUM
DC_OFST
RFDCI
28 RFDCO
VC
24 BST
25 VFC
CEI
EQ
APC
5
GND
AC
SUM
26 RFC
AC
VCA
23 RFG
22 VCC
20
21
CE
19 TE_BAL
18 TE
17 FEI
16 FE
1
LD
2
PD
11
SW 12
13
DVCC
14
DVC
15
RFAC
VC
EQ
ON/OFF
VC
VC
VC
VC
DVC
DVC
APC-OFF(Hi-Z)
RW/ROM
(H/L)
DVC
DVC
AVC
DVCC
VC
DVC
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
RW/ROM
DVCC
VCC
VCC
VCC
VOFST
VOFST
VOFST
B
C
A
D
gm
gm
DVCC
IC102
AN41020A (BD BOARD)
PGND2
PGND2
NC
NC
STBY
NC
NC
PVCC2
NC
NC
PVCC2
IN3-
IN3+
SVCC
SGND
IN2-
IN2+
IN1-
IN1+
PVCC1
PVCC1
NC
VO1+
NC
NC
NC
VO1-
PGND1
PGND1
NC(VDD)
IN4R
IN4
VREF
OP-
OP+
OP.O
VO3+
VO3-
VO4-
VO4+
VO2+
VO2-
NC(BC1)
NC
NC(SW)
NC(CT)
NC(VPUMP2)
NC(BC2)
NC(VPUMP1)
NC(BC4)
NC(BC3)
NC(FB)
OPO3(NC)
OPO2(NC)
OPO1(NC)
PVCC/2(NC)
DIRECTION DET
DIRECTION DET
DIRECTION DET
PVCC/2
PVCC/2
DIRECTION DET
RESET CIRCUIT
IC504
PCM1748E/2K (VIDEO BOARD)
1
3
2
15
14
13
12
11
11
5
4
6
9
8
10
7
16
ROUT
LOUT
VCC
VDD
DGND
LRCK
DATA
BCK
Serial
Input
Power
System Clock
System Clock
I/F
Zero Detect
DAC
DAC
Output Amp and
Low-Pass Filter
Output Amp and
Low-Pass Filter
Control
Function
Manager
8x Oversampling Digital Filter
with Function Controller
Enhanced Multi-Level
Deita-Sigma Modurator
Supply
I/F
MCLK
LAT
CLK
DATA
DATA
DZFL
DZFR
VCOM
AGND
51
HCD-GN70V
IC701
BA6956AN (DRIVER BOARD)
IC712
BA6956AN (DRIVER BOARD)
1
2
3
4
5
6
7
8
9
CONTROL LOGIC
TSD
VREF
OUT2
OUT1
RNF
VM
VCC
FIN
GND
RIN
IC721 M65850P (MIC/GUITAR BOARD)
OSCILLATOR
1/2 VCC
AUTO
RESET
LPF1
MAIN
CONTROL
A/D
20KBIT
SRAM
LPF2
D/A
1
2
3
4
5
6
7
8
9
10
14
13
12
11
CLOCK
RESET
MO
MI
D1
DO0
DO1
VCC
CLOCK
REF
OP2IN
OP2OUT
LPF2IN
LPF2OUT
LPF1IN
LPF1OUT
OP1OUT
OP1IN
CC1
CC2
GND
IC191 NJM2702 (MAIN BOARD)
4
3
VOL
9
10
8
7
GND
6
VCC
NC
L-IN
R-IN
L-OUT
R-OUT
BYPASS/SURROUND
NC
5
VREF
3D
FILTER
NC
1
FIL
2
NC
11
12
13
14
REF VOL
52
HCD-GN70V
7-22.
IC Pin Function Description
1
VB
O
Not used (Connected to ground with capacitor)
2
IREF
O
Reference current output of DAC
3
VRF
I
Reference voltage input of DAC
4
VG
O
Not used (Connected to VDD with capacitor)
5
XCPSIG
O
Not used (Connected to ground)
6
CPSIG
O
Video composite/component (Y) signal output
7
NC
O
Video chroma (C) signal output (Not used )
8
NC
—
Connected to +2.5 V
9
V_AVS
—
Ground
10
IVD1
—
Power supply (+3.3V)
11
I2C_CLK
I/O
Not used (open)
12
I2C_DATA
I/O
Not used (open)
13
GPIO0
I
Serial data input from M30620
14
GPIO1
O
Serial data output to M30620
15
GPIO2
I
Serial clock input from M30620
16
GPIO3
I
Data request signal input from M30620
17
LVD1
—
Power supply (+2.5V)
18
GPIO4
O
Ok signal output to M30620
19
GPIO5
I
Chip select signal input from M30620
20
GPIO6
I
Not used (open)
21
GPIO7
O
Not used (open)
22
LVS1
—
Ground
23
GPIO8
O
Not used (open)
24
GPIO9
O
Clock select signal output
25
GPIO10
O
Not used (open)
26
GPIO11
O
Latch signal output to PCM1748
27
LVD2
—
Power supply (+2.5V)
28
GPIO12
O
Data load signal output to BU2507FV
29
GPIO13
O
Serial data output to BU2507FV
30
GPIO14
O
Serial data clock output from BU2507FV
31
IVS1
—
Ground
32
LVS2
—
Ground
33
IVD2
—
Power supply (+3.3V)
34 to 37
DRADR0 to 3
O
Address output to memory
38
LVD3
—
Power supply (+2.5V)
39 to 45
DRADR4 to 10
O
Address output to memory
46
LVS3
—
Ground
47
IVS3
—
Ground
48
IVD3
—
Power supply (+3.3V)
49 to 56
DRDAT0 to 7
I/O
Data input/output to memory
57
IVS3
—
Ground
58
IVD4
—
Power supply (+3.3V)
59 to 66
GRDAT8 to 15
I/O
Data and input/output to memory
67
IVS4
—
Ground
68
DRCAS
O
CAS signal output to memory
69
LVD4
—
Power supply (+2.5V)
70
DRCK
O
Clock output to memory
71
IVD5
—
Power supply (+3.3V)
72
DRRAS
O
RAS signal output
73
DRWEL
O
Write enable signal output to memory
Description
Pin Name
Pin No.
I/O
• IC505 CXD1887R CD-DSP, DIGITAL SERVO, MPEG DECODER, DAC (VIDEO board)
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