Sony MEX-R5 Service Manual page 55

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MAIN BOARD IC501 MB90474PFV-G-213-BNDE1 (SYSTEM CONTROLLER)
Pin No.
Pin Name
1
EESIO
2
EECKO
3
TUNATT
4 NSMASK
5 BEEP
6
FANH
7, 8
NC
9
VSS
10 BUS_AUX
11
MUTE_SEL
12 VMUTE_R
13 VMUTE_F
14 ATT
15
VOLATT
16
REAR_ATT
17
LCDSO
18 LCDCKO
TE
L 13942296513
19
LCDCE
20
NC
21
VCC
22
DIAG
23 STB
24
NC
25
RXD
26
TXD
27 NC
28
G_DOWN
29
NC
30
SA_CLK
31 I2CCKO
32
I2CSIO
33
AVCC
34
AVRH
35 AVSS
KEYIN0,
36, 37
KEYIN1
38
RCIN0
39
VSM
www
40
VSS
41 QUALITY
42
PARKING
.
43
TEMP
44
SA_IN
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I/O
I/O Two-way data bus with the EEPROM
O Serial data transfer clock signal output to the EEPROM
O Tuner muting on/off control signal output terminal
Discharge control signal output for the noise detection circuit
O
"H": discharge (AEP, UK, Russian models only)
O Beep sound drive signal output terminal
O Fan motor drive signal output terminal (for high speed)
O Not used
- Ground terminal
Ground switching signal output of SONY bus/AUX audio input
O
"L": AUX input, "H": SONY bus input
O Muting on/off control signal output terminal "L": output only rear monitor
Video muting on/off control signal output terminal for the rear monitor output
O
"L": muting on
Video muting on/off control signal output terminal for the front monitor output
O
"L": muting on
O Muting on/off control signal output terminal
O Muting on/off control signal output to the electrical volume IC "L": muting on
O Muting on/off control signal output terminal for the rear monitor output "L": muting on
O Serial data output to the LCD driver
O Serial data transfer clock signal output to the LCD driver
O Chip enable signal output to the LCD driver
O Not used
- Power supply terminal (+5V)
I Diagnostic signal input from the power amplifier IC
O Standby control signal output to the power amplifier IC
O Not used
I Receive data input terminal for UART communication
O Transmit data output terminal for UART communication
O Not used
O Gain control signal output for the rear monitor audio output "H": gain down (-6dB)
O Not used
O Spectrum analyzer data transfer clock signal output terminal
O IIC data transfer clock signal output terminal
I/O IIC two-way data bus
- Power supply terminal (+3.3V)
I Reference voltage (+5V) input terminal (for A/D conversion)
- Ground terminal
I Front panel key input terminal (A/D input)
I Rotary remote commander key input terminal (A/D input)
I FM and AM signal-meter voltage detection signal input from the tuner unit (A/D input)
- Ground terminal
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I Noise level detection signal input at SEEK mode (A/D input) (AEP, UK, Russian models only)
I Side brake (parking brake) detection input terminal "L": brake on
i
I Temperature sensor input terminal (A/D input)
I Spectrum analyzer data input terminal
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2 9
8
Description
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MEX-R5
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