Read Sony CDX-H910UI / CDX-HR910UI Service Manual online
CDX-H910UI/HR910UI
29
• IC Pin Function Description
MAIN BOARD (3/3) IC501 MB90F883AHPF-G-104E1 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Description
1
CYRIL_SEL
I
Cyrillic setting terminal “H”: Cyrillic ON, “L”: Cyrillic OFF
2
B-OUT_SEL
I
Black out setting terminal “H”: Block out ON, “L”: Block out OFF
3
COL_SW
I
Initial color setting terminal “H”: Blue, “L”: Red
4
ILLUMI_SEL
—
Not used. (Pull down)
5
DOOR_SW
I
Front panel open detection signal input
6
DOOR_IND
O
Front panel open indicator drive signal output
7 to 10
NCO
—
Not used. (Open)
11
RE IN0
I
Rotary encoder signal input from Front panel
12
RE IN1
I
Rotary encoder signal input from Front panel
13
X_OUT
O
Low speed operation clock signal output (32.768kHz)
14
X_IN
I
Low speed operation clock signal input (32.768kHz)
15
VCC
—
Power supply (+3.3V)
16
VSS
—
Ground
17
C
—
Capacitor connected terminal
18
UNISI
I
S-BUS serial data signal input
19
UNISO
O
S-BUS serial data signal output
20
UNISCK
O
S-BUS serial clock signal output
21
NCO
—
Not used. (Open)
22
I2C_SIO
I/O
I2C serial data signal input/output
23
I2C_SCK
O
I2C serial clock signal output
24
NCO
—
Not used. (Open)
25
ACC_IN
I
Accessory power supply detection signal input
26
TEL_ATT
I
Telephone attenuate detection signal input
27
ATT
O
Audio mute control signal output
28
BUS_ON
O
S-BUS ON signal output
29
SYS_RST
O
System reset signal output
30
CD_ON
I
CD mechanism servo power supply control request signal input
31
CDM_ON
I
CD mechanism deck power supply control request signal input
32
AVCC
—
A/D converter power supply (+3.3V)
33
AVRH
—
A/D converter external reference power supply (+3.3V)
34
RC_IN1
I
Rotary command signal input from Remote in
35
AVSS
—
Ground for A/D converter
36
NCO
—
Not used. (Open)
37
VSM
I
S meter voltage detection signal input
38
SA_IN
I
Spectrum analyzer/electronic volume DC signal input
39
KEY_IN1
I
Key signal input 1
40
KEY_IN0
I
Key signal input 0
41
RC_IN0
I
Rotary command signal input from Remote in
42, 43
NCO
—
Not used. (Open)
44
VSS
—
Ground
45
KEY_ACK0
I
Acknowledge detection signal input from Rotary commander
46
KEY_ACK1
I
Acknowledge detection signal input from Front panel button
47
NCO
—
Not used. (Open)
48
LCD_CE
O
Liquid crystal display driver chip enable signal output
49
LCD_SO
O
Liquid crystal display driver serial data signal output
50
LCD_SCK
O
Liquid crystal display driver serial clock signal output
51
MD2
I
Mode setting terminal
52
MD1
I
Mode setting terminal
53
MD0
I
Mode setting terminal
54
RESET
I
Reset signal input
55
AREA_SEL2
I
Destination setting terminal
56
AREA_SEL1
I
Destination setting terminal
57
AREA_SEL0
I
Destination setting terminal
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