Sony STR-DB1070 Service Manual - Page 40

IC401 - volume low

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STR-DB870/DB1070 IC401, 501, 601, 701 TC94A07P (MAIN Board) TRIM VOLUME VSS 1 0-+24dB/ 1dB STEP TRIM 2 TRIM 3 TRIM 4 OUT VRGND 5 MAIN VOLUME 0- -85dB/ 1dB STEP 6 DECODER & LATCH CIRCUIT DECODER & LATCH CIRCUIT DECODER & LATCH CIRCUIT DECODER & LATCH CIRCUIT TRIM VOLUME 0-+24dB/ 20 VDD 1dB STEP 19 TRIM 18 TRIM 17 TRIM 16 MAIN VOLUME 0- -85dB/ 1dB STEP 15 OUT RGND IN 7 DECODER & LATCH CIRCUIT DECODER & LATCH CIRCUIT 14 IN CS1 8 GND 9 CLK 10 24 BIT SHIFT REGISTER CIRCUIT LEVEL SHIFT CIRCUIT 13 CS2 12 LAT 11 DATA IC751 NJM2145D (S-VIDEO Board (US and Canadian models)) VCC 1 OUT1 2 IN4 3 IN3 4 IN2 5 OUT3-1 6 OUT3-2 7 OUT3-3 8 INH INPUT CIRCUIT 16 GND 15 INH1 INH OUTPUT CIRCUIT OUTPUT CIRCUIT OUTPUT CIRCUIT 14 INH2 13 IN1 12 NC 11 OUT2-1 10 OUT2-2 9 OUT2-3 AGND VCC C PR C NR C PR C NR VDD DGND SYSCLK DOUT BCK LRCK IC1101 PCM1800E/2K (DIGITAL Board) 24 23 22 21 20 19 18 17 16 15 14 13 DIGITAL ∑ MODULATOR DIGITAL ∑ MODULATOR 1/64 DECIMATION FILTER & LOW-CUT FILTER SERIAL I/O INTERFACE & MODE/FORMAT CONTROL SINGLE-END DEFERENTIAL CONVERTER 1 REFERENCE 234 SINGLE-END DEFERENTIAL CONVERTER 5 CLOCK/ TIMING CONTROL RESET/ POWER CONTROL 6 789 10 11 12 LIN V REF 1 REFCOM V REF 2 RIN RSTB BYPASS FMT0 FMT1 MODE0 MODE1 FSYNC 40

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40
STR-DB870/DB1070
IC401, 501, 601, 701
TC94A07P (MAIN Board)
TRIM VOLUME
0-+24dB/
1dB STEP
TRIM VOLUME
0-+24dB/
1dB STEP
DECODER
&
LATCH CIRCUIT
DECODER
&
LATCH CIRCUIT
DECODER
&
LATCH CIRCUIT
24 BIT
SHIFT REGISTER
CIRCUIT
LEVEL SHIFT
CIRCUIT
DECODER
&
LATCH CIRCUIT
DECODER
&
LATCH CIRCUIT
DECODER
&
LATCH CIRCUIT
1
VSS
2
TRIM
3
TRIM
4
TRIM
5
OUT
6
VRGND
7
IN
8
CS1
9
GND
10
CLK
19
TRIM
18
TRIM
17
TRIM
16
OUT
15
RGND
14
IN
13
CS2
12
LAT
11
DATA
20
VDD
MAIN
VOLUME
0- –85dB/
1dB STEP
MAIN
VOLUME
0- –85dB/
1dB STEP
IC751
NJM2145D
(S-VIDEO Board (US and Canadian models))
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
INH
INH
INPUT
CIRCUIT
OUTPUT
CIRCUIT
OUTPUT
CIRCUIT
OUTPUT
CIRCUIT
VCC
OUT1
IN4
IN3
IN2
OUT3-1
OUT3-2
OUT3-3
GND
INH1
INH2
IN1
NC
OUT2-1
OUT2-2
OUT2-3
IC1101
PCM1800E/2K (DIGITAL Board)
SINGLE-END
DEFERENTIAL
CONVERTER
REFERENCE
SINGLE-END
DEFERENTIAL
CONVERTER
DIGITAL
∑
MODULATOR
DIGITAL
∑
MODULATOR
1/64
DECIMATION
FILTER
&
LOW-CUT
FILTER
CLOCK/
TIMING CONTROL RESET/
POWER CONTROL
SERIAL I/O
INTERFACE
&
MODE/FORMAT
CONTROL
LIN
V REF 1
REFCOM
V REF 2
RIN
RSTB
FMT0
BYPASS
FMT1
MODE1
MODE0
FSYNC
1
2
3
4
5
6
8
7
9
11
10
12
AGND
VCC
C PR
C NR
C PR
C NR
DGND
SYSCLK
DOUT
BCK
LRCK
VDD
24
23
22
21
20
19
17
16
15
14
13
18