Hitachi VM-H675LA Service Manual page 71

IC BLOCK DIAGRAMS
IC0101
HA118189MPER
VIDEO HEAD AMP
IC0902
NJU7285BV
BACK-UP DET
V V
REG OUT
8 6
REG2
V 7
IN
REG1
V SW1 SWITCH
DETECTION CONTROL
CIRCUIT CIRCUIT
INT VOL.
CONTROL
CIRCUIT
INT V
SW2
VOLTAGE DETECTION
DETECTOR CIRCUIT
1
VSS
IC5501
TL5001CD
SWR
4 3 2 1
B+
SWR
GND
5 6 7 8
1
2
IC0202
HD49323AF
CDS/ADC &
A/D CONV.
18 19
YIN 28
GAIN
CIN
29 SELECT
CDSIN
27
CDS AGC
VRM2
24
CLP 23
SERIAL I/F
CLAMP
17 44 45 43
IC0350
µPC5020GR-125-8J
RGB AMP
17dB AMP.
5MHz
3 V 1
BAT Buffer
LPF
2 PREEND
15K
PREEND
Diff.AMP
VOLTAGE
DETECTOR 2
REF
5 R-CH AMP.
END
END
VOLTAGE
DETECTOR
3
17dB AMP.
4 INT
5MHz
Buffer
LPF
4
15K
Diff.AMP
REF
G-CH AMP.
5
17dB AMP.
6 5MHz
Buffer
LPF
15K
Diff.AMP
7
REF
B-CH AMP.
8
9 VCA
COMMON AMP
10
3
IC BLOCK DIAGRAMS
16 34 33 32 16
CLK
DI
11 D9
10 D8
9 D7
10bit
8 D6
ADC
7 D5
6 D4
5 D3
4 D2
BIAS
3 D1
GEN
2 D0
35 1
20
25K
19
18
25K
17
16
15
25K
14
13
12
11
4 5
6 - 17 6 - 18
IC BLOCK DIAGRAMS
IC1111
MB88347PFV
D/A CONV.
VCC
9
DIGITAL BLOCK(MCU INTERFACE)
13
12-bit SHIFT REGISTER
14
D0 D1 D2 D3 D4 D5 D6 D7 D8
4-bit ADDRESS DECODER
8
1 2 3 4
8
D0 D1 D6 D7
8-bit DATA LATCH
# 1
R-2R TYPE 8-bit
D/A CONVERTER
# 1
ANALOG BLOCK(D/A CONVERTER WITH OPERATIONAL
AMPLIFIER OUTPUT BUFFERS)
8 15
VDD A01
6
GND
E
16
11 D0
D9 D10 D11
12 LD
6 7 8
D0 D1 D6 D7
8-bit DATA LATCH
# 8
D
R-2R TYPE 8-bit
D/A CONVERTER
# 8
10 1
A08 VSS
C
B
A
7 8