XR-C6103SP - Sony Car Audio Service Manual (repair manual). Page 20

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38

N/R OUT

O

Forward/reverse direction control signal output to the CXA2510Q (IC321)
“L: forward direction, “H”: reverse direction

39

NC

I

Not used (fixed at “H”)

40

CMON

O

Capstan/reel motor (M901) drive signal output terminal    “H”: motor on

41

TAPEON

O

Tape system power supply on/off control signal output terminal    “H”: tape on

42

COLSEL

I

Setting terminal for the illumination color    “L”: amber, “H”: green (fixed at “H”)

43

RCIN1

I

Rotary remote commander shift key A/D input terminal

44

TEST

I

Setting terminal for the test mode    “L”: test mode (normally fixed at “H”)

45

ILLON

O

46

BEEP

O

Beep sound output terminal

47

MUTE

O

Line muting control signal output terminal    “H”: line muting on

48

VOLCE

O

Chip enable signal output to the electrical volume (IC351)

49

SUBCE

O

Chip enable signal output terminal    Not used in this set (open)

50

VOLCKO

O

Serial data transfer clock signal output to the electrical volume (IC351)

51

SUBCKO

O

Serial data transfer clock signal output terminal    Not used in this set (open)

52

VOLSO

O

Serial data output to the electrical volume (IC351)

53

TAPMUT

O

Tape muting on/off control signal output to the CXA2510Q (IC321)    “H”: tape muting on

54

DOLON

I/O

55

DOLBC

I/O

56

AMSIN

I

Whether a music is present or not from CXA2510Q (IC321) is detected at auto music sensor
“L”: music is present, “H”: music is not present

57

MTLSEL

I/O

58

AD ON

O

Power supply on/off control signal output for the A/D converter    “L”: power on

59

RAMBU

I

60

RESET

I

System reset signal input from the reset signal generator (IC551)
“L” is input for several 100 msec after power on, then it changes to “H”

61

SIRCS

I

Sircs signal input terminal    Not used in this set (fixed at “H”)

62

BUIN

I

Battery detect signal input terminal    “H”: battery on

63

PW SEL

I

Power select switch (S701) input terminal    “L”: off (halt mode), “H”: on (operation mode)

64

ACCIN

I

Accessory detect signal input terminal    “L”: accessory on

65

NOSESW

I

Detects the removal of the attaching and removing type front panel block    “L”: attaching

66

TELMUTE

I

Telephone muting signal input terminal    At input of “L”, the signal is attenuated by –20 dB

67

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 “L”

Internal RAM reset detection signal input from the RN5VD23AA (IC552)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset

Power supply on/off control signal output terminal at the illumination and liquid crystal display
driver (IC901)    “H”: power on
At power select switch (S701) on mode: “H” output at the accessory on
At power select switch (S701) off mode: “H” output at the power on

Dolby control in/out terminal
At initial mode: valid/invalid selection input of dolby function (“L” input: valid)
At normal mode: dolby on/off control signal output to the CXA2510Q (IC321)
“H”: dolby on

Dolby B/C selection control in/out terminal
At initial mode: dolby B only/dolby B and C type selection input (“L” input: dolby B and C)
At normal mode: dolby type selection signal output    “L”: dolby B, “H”: dolby C
Not used this function (fixed at “H”)

METAL control in/out terminal
At initial mode: auto/manual mode selection input of METAL function    “L”: manual mode
At manual mode: METAL on/off control signal output to the CXA2510Q (IC321)
“H”: METAL on
At auto mode: input at MTLIN (pin #º)