Read Sony XR-CA430X Service Manual online
24
XR-CA430X
6-8.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC501 MN101C49GYA2 (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
VREF–
I
Reference voltage (0V) input terminal (for A/D converter)
2
VSM
I
FM and AM signal meter voltage detection signal input from the FM/AM tuner unit
(A/D input)
(A/D input)
3
NIL
I
Not used
4
KEYIN1
I
Key input terminal (A/D input)
5
KEYIN0
I
Key input terminal (A/D input)
6
RCIN0
I
Rotary remote commander key input terminal (A/D input)
7, 8
NIL
I
Not used
9
DSTSEL
I
Destination setting terminal (A/D input) (fixed at “L” in this set)
10
VREF+
I
Reference voltage (+5V) input terminal (for A/D converter)
11
VDD
—
Power supply terminal (+5V)
12
OSCOUT
O
Main system clock output terminal (18.432 MHz)
13
OSCIN
I
Main system clock input terminal (18.432 MHz)
14
VSS
—
Ground terminal
15
XIN
I
Sub system clock input terminal (32.768 kHz)
16
XOUT
O
Sub system clock output terminal (32.768 kHz)
17
MMOD
I
Selection signal of memory mode input terminal “L”: single chip mode
(fixed at “L” in this set)
(fixed at “L” in this set)
18
LCDSO
O
Serial data output to the liquid crystal display driver
19
LCDCE
O
Chip enable signal output to the liquid crystal display driver “H” active
20
LCDCKO
O
Serial data transfer clock signal output to the liquid crystal display driver
21 to 23
NCO
O
Not used
24
SYSRST
O
Reset signal output to the SONY bus interface “L”: reset
25
BUSON
O
Bus on/off control signal output to the SONY bus interface “L”: bus on
26
KEYACK
I
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
and eject keys in the power off status On at input of “H”
and eject keys in the power off status On at input of “H”
27
NIL
I
Not used
28
BU-IN
I
Battery detection signal input from the SONY bus interface
“L” is input at low voltage
“L” is input at low voltage
29
SIRCS
I
SIRCS remote control signal input terminal Not used
30, 31
NIL
I
Not used
32
NIH
I
Not used
33
RESET
I
System reset signal input from the reset signal generator and reset switch “L”: reset
“L” is input for several 100 msec after power on, then it changes to “H”
“L” is input for several 100 msec after power on, then it changes to “H”
34
TUNON
O
Tuner system power supply on/off control signal output “H”: tuner power on
35
BEEP
O
Beep sound drive signal output to the power amplifier
36
PW_ON
O
Main system power supply on/off control signal output “H”: power on
37
FM_ON
O
FM power supply on/off control signal output “H”: FM power on
38
ACCIN
I
Accessory detection signal input “L”: accessory on
39
NCO
O
Not used
40
TELATT
I
Telephone attenuate signal input At input of “H”, the signal is attenuated by –20 dB
Not used
Not used
41
NIH
I
Not used
42
BUSSO
O
Serial data output to the SONY bus interface
43
BUSSI
I
Serial data input from the SONY bus interface
44
BUSCKO
O
Serial data transfer clock signal output to the SONY bus interface
Ver 1.1
Click on the first or last page to see other XR-CA430X service manuals if exist.