Sony CDX-C90R Service Manual page 26

IC102 CXA1946BR
36 35 34
LOUD
GAIN12 37
GAIN11 38
IN14
39
IN13 40
IN12 41
IN11 42
ZCDET
IN21 43
IN22 44
IN23 45
IN24 46
GAIN21 47
GAIN22 48
LOUD
1 2 3
IC303 AT24C16N-10SI-TR
NC 1
LOGIC
DOUT/ACK
2
NC
SERIAL MUX
EEPROM
ADDRESS/COUNTER
3 DATA REGISTER
NC
INC
H. V. PUMP/TIMING CONTROL
EN
SERIAL
4
GND
33 32 31 30 29 28 27 26
VOLUME VOLUME
TONE
8dB STEP 1dB STEP
VCTBUFF
VCTBUFF
VCTBUFF
LATCH
LATCH
CONTROL
SHIFT
REGISTER
VCTBUFF
VCTBUFF
VCTBUFF
VOLUME VOLUME
TONE
8dB STEP 1dB STEP
4 5 6 7 8 9 10 11
DOUT 8 VCC
DIN
R/W
7
TEST
Y DEC
DATA WORD
6
SCL
LOAD
LOGIC
LOGIC
5
STOP SDA
START
BUS ON
25
RST
24 FNTO1
FADER
23 REO1
BATT
CLK
VREF
DATA
GND
22 CE
21 CLK
20 DGND
19 GND
45k
45k
18 VCC
17 VCT
16 DATA
15 TIMER
14 REO2
FADER
13 FNTO2
12
IC503 MBM29F800BA-70PFTN97
A15
1
A14
2
A13
3
X
A12
4
DECODER
A11
5
A10
6
A9
7
ADDRESS
A8
LATCH
8
Y
DECODER
9 NC
10 NC
STB
WE
CONTROL
11
CIRCUIT
RESET
12
13 NC
14 NC
RY/BY
15
A18
16
A17
17
A7
18 RY/BY
A6
BUFFER
19
A5
20
A4
21
A3
22
A2
23
A1
24
– 66 –
IC302 BA8270F-E2
BUS ON
14 VCC
1
SWITCH
RESET
2 13 RST
SWITCH
12 BUS ON
11 CLK IN
BATTERY
3 10 BU IN
SWITCH
4
5
6 9 DATA IN
7 8 DATA OUT
8,388,608
CELL
MATRIX
Y GATE
I/O
BUFFER
DATA
LATCH
STB
LOW VCC
DETECTOR CIRCUIT
WRITE/ERASE
PULSE TIMER
WRITE CIRCUIT
ERASE CIRCUIT
CHIP ENABLE/
OUTPUT ENABLE
CIRCUIT
A16
48
BYTE
47
GND 46
DQ15/A–1
45
DQ7
44
DQ14
43
DQ6
42
DQ13
41
DQ5
40
DQ12
39
DQ4
38
VCC 37
DQ11
36
DQ3
35
DQ10
34
DQ2
33
DQ9
32
DQ1
31
DQ8
30
DQ0
29
OE
28
GND 27
CE
26
A0
25