Hitachi DZ-GX20A Service Manual page 161

1 2
S-18 IC Block Diagrams-2/2
IC1307
F
NJM3414AV-TE1
1
8 ADC 17
VCC
7
A
CDS
CDS 20
B
2
FBC 21
3
6
SHC 22
4 GND 5
ADCK 13
TIMING
IC1308
SP1 16
GENERATOR
MB88347PFV SP2 18
E
16 VSS 1
15 2
14 3
13 4
D/A
12 5 UPD16510GR
CONV.
11 6
10 7
VSB 20
9 8
VCC VDD
VDD1 16
IC1403
VSS 2
NJU7018VTE1
D
TI1 7
1
VDD 8
7
PG1 8
2
BI1 9
3
6
TI2 14
4 VSS 5
PG2 13
IC2001
SN74ALVC04PWR
BI2 12
C
SUB1 10
1 2
3 4
N.C. 11
5 6
9 8 VCC 6
11 10
GND 15
13 12
IC4007,
IC2008
IC4008
NJM2872AF34-TE12
SN74LVC1G08DCKR
B
3V
1 5 1 VCC 5
REG
2 GND 2
NOISE
3 4 3 4
GND
BYPASS
IC2007
IC4011
TC7W126FU
SN74AHC1G66HDCK
G2 Y1 A2
8 7 6 5
VCC
1 VCC 5
SW
2
A GND
3 GND 4
1 2 3 4
G1 A1 Y2
1 2
3
IC2002,
IC2003
HD49343
1
VDDL 4
12bit 9,
DIFFERENCE D0-D11
PGA
ADC 34
36
CLAMP
14 PBLK
15 OBP
VDD
17
29 CS
SERIAL
30 SDATA
COMM
V REF BIAS
31 SCK
VBK 32
23 25 26
IC2004
4
VDD2a
19
VDD2b
SW1-4 25-28
EJECT 24
23
FLRSTI
5
TO1
SW5 22
3 BO1
VI1 31
17 TO2
S-80952CNNB
18 BO2
VDD 2
1 SUBO
V
REF
VSS 1
IC8001
NJM2872AF34
3.4V
1 5
REG
2 GND
NOISE
3 4
BYPASS
BIAS
IC3701
NJM2872AF25
CLAMP
2.5V
1 5
REG
IN1 6
2 GND
NOISE
3 4
BYPASS
IN2 4
3
4 5
IC4006
RX-5411LD
VDD
RESET
DETECTOR
INTERRUPTS
BUS
INTERFACE
XG
CHARGE
REAL TIME
CIRCUIT
CLOCK
XD
32.768kHz
VCAP
SRAM
(2k Bits)
VDDL
USER LOGIC
LED DRIVER
CONTROL
SW CONTROL
I/O CONTROL
(2k GATES)
VOLTAGE
DETECTOR
IC4012,
IC4013
49
50 DV
15db
51
DELAY 4 OUT
52
15db
53
DC
54
3
S-DC
55
CD
IC6021
56
MM1503XNRE
57
SW VCC
58
1 3
59
60
CLAMP
61
62
SP
6dB OUT
2
63
GND
64
5
GND
4 5
S - 16
6 7
IC4009
S-814A33AMC
V IN
1
5-8 CLK,CE,DI,DO
ON/OFF 3 ON/OFF
V
REF
VSS 2
IC4010
HD74LV1GW97A
3
DO1
DO2
2
IN0 3
1
DO3
IN1 1
19 RESET1
IN2 6
20 OUT1
11-16 I/O PORT
IC6301
AN2903FJQ
48 47 46 45 44 43 42 41 40 39 38 37
GND
AND
IF
DY
15db
GCA
STB 3db
DOS DOS
CLAMP
W B
MIX
GCA
DOS
B 3db
EFR
EFR
MUTE
DC SHIFT DC SHIFT DC SHIFT
VCC
1/2
VCC
1 2 3 4 5 6 7 8 9 10 11 12
6 7
8
F
V OUT
5
SHORT
PROTECT
E
VCC
5
4 Y
D
2
GND
36 35 34 33
C
32
ATT
-9db
31
LPF
BUFF 30
29
28
BPF
ATT
BUFF GND 27
-9db
26
EVR
B
CTL 25
MUTE 2nd LPF 24
MUTE 2nd LPF 23
22
MUTE
21
MUTE
CTL
20
DC SHIFT
MUTE
19
CTL
18
A
17
13 14 15 16
8