XR-C8220R - Sony Car Audio Service Manual (repair manual). Page 43

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Pin No.

Pin Name

I/O

Function

32

LCD INH

O

Blank indicate control signal output to the liquid crystal display driver (IC900)    “L”: no display

33

VSS

—

Ground terminal

34

C

—

Connected to coupling capacitor for the power supply

35

AD-ON

O

A/D converter power control signal output terminal
When the KEYACK (pin &§) that controls reference voltage power for key A/D conversion input 
is active, “L” is output from this terminal to enable the input

36

RE-IN0

I

37

RE-IN1

I

38

DVCC

—

Power supply terminal (+5V) (for D/A converter)

39

DVSS

—

Ground terminal (for D/A converter)

40

—

I

Not used (fixed at “L”)

41

LCDANG

O

View field angle control signal is output when front panel is fully opened
“H”: front panel is fully opened

42

AVCC

—

Power supply terminal (+5V) (for A/D converter)

43

AVRH

I

Reference voltage (+5V) input terminal (for A/D converter)

44

AVRL

I

Reference voltage (0V) input terminal (for A/D converter)

45

AVSS

—

Ground terminal (for A/D converter)

46

KEYIN0

I

Key input terminal (A/D input) (LSW900, S900, LSW901 to LSW908)    OFF, SEEK/AMS + 
+ )  = 0 – , MODE  *, SOURCE, SOUND, DSPL, SHIFT, 1, 2, 3 keys input

47

KEYIN1

I

Key input terminal (A/D input) (SW801, LSW909 to LSW918)
6, LIST, AF/TA, PTY LIST, 10, 9, 8, 7, 6, 5, 4 keys input

48

RC-IN0

I

Rotary remote commander key input terminal (A/D input)

49

DSTSEL0

I

Destination setting terminal (fixed at “L”)

50

DSTSEL1

I

Destination setting terminal (fixed at “H”)

51

DSTSEL2

I

Destination setting terminal (Type 1: fixed at “L”, Type 2: fixed at 1/4 voltage, Type 3: fixed at 
1/2 voltage, Type 4: fixed at 3/4 voltage)

52

MTP

I

Multi-path detection signal input from the RDS decoder (IC150)

53

VSM

I

FM and AM signal meter voltage detection input from the FM/AM tuner unit (TUX10)
(A/D input)

54

VCC

—

Power supply terminal (+5V)

55

RAMBU

I

Internal RAM reset detection signal input from the RN5VD33AA (IC501)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset

56

POWSEL

I

Power select switch (S600) input terminal    “L”: off (halt mode), “H”: on (operation mode)

57

EQ-SEL

I

Not used (fixed at “H”)

58

TESTIN

I

Setting terminal for the test mode    “L”: test mode, Normally: fixed at “H”

59

PACK-IND

O

LED drive signal output of the tape window illumination and 

6 indicators (LED800, 802)

“H”: LED on    “H” is output to turn on LED when front panel is opened

60

TIR-PLAY

O

AM/TIR selection signal output to the TC4W66F (IC51)    “L”: AM signal, “H”: TIR signal

61

SUB-SW1

O

Sub woofer output cut-off frequency select signal output terminal

62

SUB-SW0

O

Sub woofer output cut-off frequency select signal output terminal

63

VSS

—

Ground terminal

64

VOLCE

O

Chip enable signal output to the main electrical volume (IC301)    “H”: active

65

MUTE

O

Audio line muting on/off control signal output terminal    “H”: muting on

66

VOLSO/       

SUBSO

O

Serial data output to the main electrical volume (IC301) and sub electrical volume (IC350)

67

VOLCKO/      

SUBCKO

O

Serial data transfer clock signal output to the main electrical volume (IC301) and sub electrical 
volume (IC350)

68

SUBCE

O

Chip enable signal output to the sub electrical volume (IC350)    “H” active

Dial pulse input of the rotary encoder (RE900)
 (for VOLUME/BASS/TREBLE/BALANCE/FADER control)