Sony VPL-PX32 Service Manual page 115

CXA1875AM-T4 (IC806, IC807)
16 15 14 13 12
LEVEL
LATCH
CONVERTER
LEVEL
CONVERTER
I 2 C DECODER
POWER
ON
RESET
LATCH LATCH LATCH
— DAC DAC
+
VCC
REG
AMP AMP AMP
1 2 3 4 5
LM358PSR (IC821) MC74HC4052ADTR2 (IC811)
OUTPUT 1 1 8 VCC
7 OUTPUT 2
INPUT 1 (-) 2
INPUT 1 (+) 3 6 INPUT 2 (-)
GND 4 5 INPUT 2 (+)
SN75453BPSR (IC814)
SN75157PS-ELL2000 (IC813)
NON INV IN1
1A 1 8 V
CC
1B 2 7 2B
1Y 3 6 2A
GND 4 5 2Y
VPL-PX32
A B
CXA1946AR (IC819)
11 10 9
OPEN COLLECTOR
LEVEL
CONVERTER
GAIN12
37
GAIN11 38
IN14 39
IN13 40
IN12
41
IN11 42
LATCH LATCH
43
DAC DAC DAC IN21
44
IN22
IN23 45
46
IN24
AMP AMP
47
GAIN21
48
GAIN22
6 7 8
EL4332CS-TE2 (IC801)
OUT1 1
16 15 14 13 12 11 10 9
GND1 2
A1 3
1 2 3 4 5 6 7 8
B1
4
B2
5
A2 6
1 8 V
CC
GND2 7
OUT1 2 7 INV IN2
OUT2 3 6 NON INV IN2
4 OUT2 8
GND 5 INV IN2
C D
QA QA
36 35 34 33 32 31 30 29 28 27 26
VOLUME VOLUME
LOUD TONE
8dB STEP 1dB STEP
VCTBUFF
VCTBUFF
VCTBUFF
LATCH
LATCH
CONTROL
ZCDET
SHIFT
REGISTER
VCTBUFF
VCTBUFF
VCTBUFF
VOLUME VOLUME
LOUD TONE
1dB STEP
8dB STEP
1 2 7 8 9 10 11
3 4 5 6
GS1881-CTA (IC805)
C SYNC OUT 1
16 A/B
15 V CC
VIDEO IN 2
14 V
CC
13 V
EE
11µ
3
V SYNC OUT
12 A3
11 B3
4
GND
10 GND3
9 OUT3
7-9 7-9
E
TC74VHC123AF (EL) (IC804)
A 1
25
B 2
RD 3
24
FNTO1
FADER
23 REO1
Q 4
D
Q
5
RD
6
C
R 7
22 CE
GND 8
21 CLK
20 DGND
19 GND
45k
TC74VHC244F (EL) (IC803)
45k
18 VCC
17 VCT
OEA 1 20 VCC
16 DATA
A1 2 19 OEB
YB4 3 18 YA1
15 TIMER
4 17 B4
A2
14 REO2 YB3 5 16 YA2
FADER
13 FNTO2
15
A3 6 B3
YB2 7 14 YA3
A4 8 13 B2
12
YB1 9 12 YA4
GND 10 11 B1
C SYNC
V SLICE
HORIZONTAL
V CLAMP
D Q D
WINDOW
CIRCUIT
85µ
G Q CLK
NOSYNC
V CC
D Q
VERTICAL
VOLTAGE
DETECTOR
REGULATOR
CLK( ) Q
12V
BACK PORCH
TIMING
DETECTOR
CURRENT
F G
1
16 VDD
15 R
14 C
RD
Q Q
13 Q
Q Q
12
Q
11 RD
10 B
9 A
2
3
8 V
CC
4
ODD/EVEN
7
OUT
Q
Q
6
R SET
BACK PORCH
5
OUT
5
H