TC-KE240, TC-RE340 - Sony Audio Service Manual (repair manual). Page 29

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Pin No.

Pin Name

I/O

Description

37

KEY1

I

Key input terminal (A/D input) (S921, 922, 924, 926 (TC-KE240)    x, PAUSE X, m AMS 
M, REC MUTING W (TC-KE240) keys input,  (S921 to S923, S925 to S927)    x, PAUSE X, 
AMS M H, m AMS h, REC MUTING W (TC-RE340) keys input

38

RESET

I

System reset signal input from the reset signal generator (IC802)    “L”: reset                                   
“L” is input for several 100 msec after power on, then it changes to “H”

39

EXTAL

I

Main system clock input terminal (10 MHz)

40

XTAL

O

Main system clock output terminal (10 MHz)

41

VSS

—

Ground terminal

42

TX

O

Sub system clock output terminal (32.768 kHz)    Not used (pull down)

43

TEX

I

Sub system clock input terminal (32.768 kHz)    Not used (fixed at “L”)

44

VOL IN

I

REC LEVEL volume (RV901) input terminal (A/D input)

45

DOLBY SW

I

DOLBY NR switch (S917) input terminal (A/D input)

46

AVREF

—

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

47

AVSS

—

Ground terminal (for A/D converter)

48

ARL LED

O

LED drive signal output of the AUTO REC LEVEL indicator (D901)    “L”: LED on

49

CD SYNC LED

O

LED drive signal output of the SYNCHRO indicator (D902)    “L”: LED on

50

CAP M2

O

51

CAP M4

O

52

CAP M3

O

53

CAP M1

O

54 to 57

BIAS CAL0 to 

BIAS CAL3

O

Calibration control signal output terminal

58 to 68

—

—

Not used (open)

69

OSC ON/OFF

O

Calibration OSC on/off control signal output terminal

70

OSC H/L

O

Calibration tone frequency high/low control signal output terminal    “L”: frequency low

71

LINE MUTE

O

Line muting on/off control signal output terminal    “L”: muting on

72 to 87

—

—

Not used (open)

88

VF

—

Power supply terminal (for FDP)    Not used (fixed at “L”)

89

VDD

—

Power supply terminal (+5V)

90

NC

—

Not used (fixed at “L”)

91

VSS

—

Ground terminal

92

BIAS A

O

Recording bias on/off control signal output terminal    “L”: bias on    Not used (open)

93

BIAS

O

Recording bias on/off control signal output terminal    “L”: bias on

94

VERSION

I

Setting terminal for the model type

95

AMS IN

I

Auto music sensor signal input terminal    “L”: AMS detect

96

TRG B

O

Plunger (PM1001) drive signal output terminal

97

TRG A

O

Plunger drive signal output terminal    Not used (open)

98

—

—

99

PLAYSW A

I

Mechanism playback detect signal input terminal    “H”: playback    Not used (open)

100

70U A

I

CrO

2

 detect signal input terminal    “H”: CrO

2

    Not used (fixed at “L”)

Capstan motor (M1002) drive signal output terminal