Read Sony CDX-M730 Service Manual online
22
CDX-M730
4-1. IC PIN DESCRIPTIONS
• IC801 MB90574CPMT-G-369-BNDE1 (SYSTEM CONTROL) (US, Canadian Model)
• IC801 MB90574CPMT-G-370-BNDE1 (SYSTEM CONTROL) (AEP, UK, E Model)
• IC801 MB90574CPMT-G-370-BNDE1 (SYSTEM CONTROL) (AEP, UK, E Model)
Pin No.
Pin Name
I/O
Pin Description
1
CD RESET
O
Servo CPU reset signal output to servo IC (IC1)
2
NCO
O
Not used. (Open)
3
A0
O
Servo CPU command/parameter discriminate signal output to servo IC (IC1)
4
NCO
O
Not used. (Open)
5
ATT
O
System mute control signal output
6
SYSRST
O
System reset signal output to bus interface (IC802)
7
STB
O
Servo CPU data strobe signal output to servo IC (IC1)
8
VCC
—
Power supply pin (+5 V)
9
XTAL EN
O
Servo CPU crystal oscillator control signal output to servo IC (IC1)
10
E2PSIO
I/O
EEPROM data signal input/output with tuner unit (TU601)
11
E2PCKO
O
EEPROM clock signal output to tuner unit (TU601)
12
FLS SI
I
Flash write-in data signal input
13
FLS SO
O
Flash write-in data signal output
14
BUS ON
O
BUS ON control signal output to sub system control (IC301)
15
BEEP
O
Beep signal output
16
TEL ATT
I
Telephone mute detect signal input
17
UNI SI
I
SONY BUS data signal input from bus interface (IC802)
18
UNI SO
O
SONY BUS data signal output to bus interface (IC802)
19
UNI CKO
O
SONY BUS clock signal output to bus interface (IC802)
and sub system control (IC301)
20
LIMIT
I
CD limit SW signal input (SW4)
21
PH1
I
CD PH1 detect signal input Not used in this set. (Open)
22
DSW
I
CD disc SW detect signal input (SW5)
23
IN/PH2
I
CD IN SW/PH2 detect signal input (SW6)
24
SIRCS
I
Remote control data signal input from sircs interface (IC803)
25
CD TSI
I
Servo CPU serial data signal input from servo IC (IC1)
26
CD TSO
O
Servo CPU serial data signal output to servo IC (IC1)
27
CD TCK
O
Servo CPU serial clock signal output to servo IC (IC1)
28
RF OK
I
Servo CPU RFOK signal input from servo IC (IC1)
29
TSTB
O
Servo CPU CD TEXT strobe signal output to servo IC (IC1)
30
NCO
O
Not used. (Open)
31
VOL ATT
O
Electronic volume mute signal output to electronic volume (IC305)
32
NCO
O
Not used. (Open)
33
VSS
—
Ground pin
34
C
—
Condenser pin for voltage stabilizer
35
SELF SW
I
CD self SW signal input (SW2)
36
PH3
I
CD PH3 detect signal input Not used in this set. (Open)
37
SHIFT
O
OSC frequency shift signal output for DC-DC converter (IC901)
38
DVCC
—
Power supply pin (+5 V)
39
DVSS
—
Ground pin
40
FP CTRL
O
Front panel open/close speed control signal output
41
NCO
O
Not used. (Open)
42
AVCC
—
Power supply pin (+5 V)
43
AVRH
—
Power supply pin (+5 V)
44
AVRL
—
Ground pin
45
AVSS
—
Ground pin
46
KEY IN0
I
Key signal input 0
47
KEY IN1
I
Key signal input 1
48
RC IN0
I
Rotary commander signal input 0
49
NCO
O
Not used. (Open)
SECTION 4
DIAGRAMS
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