Sony CDX-C90 Service Manual page 69

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
1
NC
LOGIC
DOUT/ACK
2
NC
SERIAL MUX
EEPROM
3
NC DATA REGISTER
INC
H. V. PUMP/TIMING
EN
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
DIN
R/W
7
Y DEC
ADDRESS/COUNTER
DATA WORD
6
LOAD
LOGIC
CONTROL
SERIAL
LOGIC
5
STOP
START
25
24 FNTO1
FADER
23 REO1
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
VCC 1
A14
2
A13
3
A12
4
A11
5
A10
TEST 6
A9
7
ADDRESS
A8
8 LATCH
9 NC
10 NC
SCL
STB
SDA
WE
CONTROL
11
CIRCUIT
RESET
12
13
NC
NC
14
RY/BY
15
A18
16
A17
17
A7
18
RY/BY
A6
BUFFER
19
A5
20
A4
21
A3
22
A2
23
A1
24
– 94 –
IC302 BA8270F-E2
BUS ON
BUS ON
1
SWITCH
RESET
2
RST
SWITCH
BATTERY
BATT 3
SWITCH
4
CLK
5
VREF
6
DATA
GND 7
8,388,608
X
CELL
DECODER
MATRIX
Y GATE
Y
DATA
DECODER
LATCH
STB
LOW VCC
DETECTOR CIRCUIT
WRITE/ERASE
PULSE TIMER
WRITE CIRCUIT
ERASE CIRCUIT
CHIP ENABLE/
OUTPUT ENABLE
CIRCUIT
14 VCC
13
RST
BUS ON
12
11 CLK IN
10 BU IN
9 DATA IN
8 DATA OUT
A16
48
BYTE
47
GND 46
DQ15/A–1
45
DQ7
44
DQ14
43
DQ6
42
DQ13
I/O
41
BUFFER
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