Read Sony CDX-MP450X Service Manual online
20
CDX-MP450X
• IC801 µPD17708GC-618-3B9 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
SIRCS
I
Wireless remote commander input
2
SELF SW
I
Self switch input
3
DOOR
I
Front panel open/close detection input
4
NOSE
I
Front panel with/without detection input
5
NC
—
Not used. (Connect to ground)
6
SYSRST
O
Reset output for slave microcomputer IC.
7
DOOR IND
O
CD door open/close detection output
8
MUTE
O
Mute on/off control output
9, 10
NC
—
Not used. (Open)
11
BAND-SW
I
Initial setting switch input (Fixed at H in this set)
12
AREA1-SW
I
Destination check input 1 (Fixed at L in this set)
13
AREA2-SW
I
Destination check input 2 (Fixed at H in this set)
14
NC
—
Not used. (Open)
15
PARK
I
Parking signal detection input
16
TEL MUTE
I
Attenuator on/off control input
17
POWER IC ON
O
Power supply control output to power amplifier IC.
18
SEEK
O
SEEK output
19
AMP MUTE
O
Output control to power amplifier IC.
20
NC
—
Not used. (Open)
21
GND3
—
Ground
22
KEYIN3
I
Key input of A/D converter (Fixed at L in this set)
23, 24
KEYIN2, 1
I
Key input of A/D converter.
25
ROT-IN
I
Rotary commander A/D value input
26
S-METER
I
S-meter input
27
TEST-SW
I
Initial setting switch input (Fixed at H in this set)
28
AM IFC
I
AM center frequency counter input
29
FM IFC
I
FM center frequency counter input
30
VDD
—
Power supply pin
31
VCOH FM
I
FM input at VCO is FM.
32
VCOL AM
I
AM input at VCO is AM.
33
GND1
—
Ground
34
NC
—
Not used. (Open)
35
EO1 PDOUT
O
Error out output
36
TEST0
I
Fixed at L in this set.
37, 38
NC
—
Not used. (Open)
39
LCL/DX
O
LOCAL/DX select output
40
BEEP
O
Beep output
41
ACC IN
I
Accessory input (L: ACC)
42, 43
RE1, 2
I
Rotary encoder input 1, 2
44
NC
—
Not used. (Open)
45
MONO
O
Monaural output (H: Monaural, L: Stereo)
46
SD
I
SD input
47
VOL CE
O
Chip enable output for Electric volume IC.
48
VOL CLK
O
Clock output for Electric volume IC.
49
VOL DATA
O
Data output for Electric volume IC.
50
NC
—
Not used. (Open)
51
FM ON
O
FM system power control output (H: FM ON)
52
AM ON
O
AM system power control output (H: AM ON)
53
LCD CE
O
Chip enable output for LCD driver IC.
54
ILL ON
O
Front panel backlight control output (H: Illumination ON)
55
NC
—
Not used. (Connect to ground)
56, 57
NC
—
Not used. (Open)
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