DOWNLOAD Sony MDX-C8900 Service Manual ↓ Size: 6.79 MB | Pages: 80 in PDF or view online for FREE

– 77 –

•

Pin No.

Pin Name

I/O

Function

1

I

I

I-V converted RF signal I input from the optical pick-up block detector

2

J

I

I-V converted RF signal J input from the optical pick-up block detector

3

VC

O

Middle point voltage (+1.65V) generation output terminal

4 to 9

A to F

I

Signal input from the optical pick-up detector

10

PD

I

Light amount monitor input from the optical pick-up block laser diode

11

APC

O

Laser amplifier output terminal to the automatic power control circuit

12

APCREF

I

Reference voltage input terminal for setting laser power

13

GND

—

Ground terminal

14

TEMPI

I

Connected to the temperature sensor    Not used (open)

15

TEMPR

O

Output terminal for a temperature sensor reference voltage    Not used (open)

16

SWDT

I

Writing serial data input from the MD mechanism controller (IC501)

17

SCLK

I

Serial data transfer clock signal input from the MD mechanism controller (IC501)

18

XLAT

I

Serial data latch pulse signal input from the MD mechanism controller (IC501)

19

XSTBY

I

Standby signal input terminal    “L”: standby (fixed at “H” in this set)

20

F0CNT

I

Center frequency control voltage input terminal of internal circuit (BPF22, BPF3T, EQ) input 
terminal

21

VREF

O

Reference voltage output terminal    Not used (open)

22

EQADJ

I

Center frequency setting terminal for the internal circuit (EQ)

23

3TADJ

I

Center frequency setting terminal for the internal circuit (BPF3T)

24

VCC

—

Power supply terminal (+3.3V)

25

WBLADJ

I

Center frequency setting terminal for the internal circuit (BPF22)

26

TE

O

Tracking error signal output to the CXD2652AR (IC301)

27

CSLED

I

Connected to the external capacitor for low-pass filter of the sled error signal

28

SE

O

Sled error signal output to the CXD2652AR (IC301)

29

ADFM

O

FM signal output of the ADIP

30

ADIN

I

Receives a ADIP FM signal in AC coupling

31

ADAGC

I

Connected to the external capacitor for ADIP AGC

32

ADFG

O

ADIP duplex signal (22.05 kHz 

±

 1 kHz) output to the CXD2652AR (IC301)

33

AUX

O

Auxiliary signal (I

3

 signal/temperature signal) output terminal    Not used (open)

34

FE

O

Focus error signal output to the  CXD2652AR (IC301)

35

ABCD

O

Light amount signal (ABCD) output to the CXD2652AR (IC301)

36

BOTM

O

Light amount signal (RF/ABCD) bottom hold output to the CXD2652AR (IC301)

37

PEAK

O

Light amount signal (RF/ABCD) peak hold output to the CXD2652AR (IC301)

38

RF

O

Playback EFM RF signal output to the CXD2652AR (IC301)

39

RFAGC

I

Connected to the external capacitor for RF auto gain control circuit

40

AGCI

I

Receives a RF signal in AC coupling

41

COMPO

O

User comparator output terminal    Not used (open)

42

COMPP

I

User comparator input terminal    Not used (fixed at “L”)

43

ADDC

I

Connected to the external capacitor for cutting the low band of the ADIP amplifier

44

OPO

O

User operational amplifier output terminal    Not used (open)

45

OPN

I

User operational amplifier inversion input terminal    Not used (fixed at “L”)

46

RFO

O

RF signal output terminal

47

MORFI

I

Receives a MO RF signal in AC coupling

48

MORFO

O

MO RF signal output terminal

– 78 –

•

Pin No.

Pin Name

I/O

Function

1

SEEKOUT

O

2

NCO

O

Not used (open)

3

WIDE

O

4

ST-MONO

I/O

5

TU-ATT

O

Muting on/off control signal output of the FM tuner signal    “H”: muting on

6

FM-ON

O

FM system power supply on/off control signal output to the BA3918 (IC506)
“H”: FM power on, “L”: AM power on

7

TU-ON

O

Tuner system power supply on/off control signal output to the BA3918 (IC506)
“H”: tuner power on

8

VCC

—

Power supply terminal (+5V)

9

CSV-RST

O

Reset signal output to the MSM6654A (IC502)     “L”: reset

10

BUS-ON

O

Bus on/off control signal output to the MD mechanism controller (IC501) and SONY bus 
interface (IC504)    “L”: bus on

11

SYSRST

O

Reset signal output to the MD mechanism controller (IC501) and SONY bus interface (IC504)    
“L”: reset

12

DOORSW

I

Front panel open/close detection signal input    “L” is input when the front panel is closed

13

LCD SO

O

Serial data output to the liquid crystal display driver (IC900)

14

LCD CKO

O

Serial data transfer clock signal output to the liquid crystal display driver (IC900)

15

BEEP

O

Beep sound drive signal output terminal

16

LCD CE

O

Chip enable signal output to the liquid crystal display driver (IC900)    “H” active

17

UNISI

I

Serial data input from the SONY bus interface (IC504)

18

UNISO

O

Serial data output to the SONY bus interface (IC504)

19

UNICKIO

I/O

Serial data transfer clock signal in/out terminal with the MD mechanism controller (IC501) and 
SONY bus interface (IC504)

20

SD-IN

I

Station detector detect input from the FM/AM tuner unit (TU1)                                                         
Stop level for SEEK, BTM, etc. is determined    SD is present at input of “H”

21

CSV-SO

O

Serial data output to the MSM6654A (IC502)

22

CSV-CKO

O

Serial data transfer clock signal output to the MSM6654A (IC502)

23

CSV-CE

O

Chip enable signal output to the MSM6654A (IC502)    “H” active

24

SIRCS

I

Sircs remote control signal input from the remote control receiver (IC901)

25

PLLSI

I

PLL serial data input from the FM/AM PLL (IC4)

26

PLLSO

O

PLL serial data output to the FM/AM PLL (IC4)

27

PLLCKO

O

PLL serial data transfer clock signal output to the FM/AM PLL (IC4)

28

PLLCE

O

PLL chip enable signal output to the FM/AM PLL (IC4)    “H” active

29

ILL-ON

O

30

DIMMER

I/O

Power on/off control signal output of the illumination LED and liquid crystal display driver 
(IC900)    “H”: power on    Depends on initial setting of power select switch (SW500)
Power select switch (SW500) on: “H” output at the accessory on
Power select switch (SW500) off: “H” output at the power on

Dimmer control in/out terminal
At initial mode: The presence of dimmer select function is set (if this status, if “L” is input, the 
dimmer select function is present)
At normal mode: LCD back light brightness control signal output

Seek control signal output to the FM/AM tuner unit (TU1)
AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM
FM mode: Used for SD speed up at SEEK, BTM, or AF
“L” is output at tuner off

IF band select signal output to the FM/AM tuner unit (TU1)    “H”: wide mode
In receiving FM signals, interference noise from adjacent stations is removed by narrowing the 
IF band automatically in the tuner unit so as to raise the selectivity, but in this case, the distortion 
may increase and accordingly, the IF band is widened forcibly 

FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU1), or forced 
monaural control signal output to the FM/AM tuner unit (TU1)
“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode

– 79 –

Pin No.

Pin Name

I/O

Function

31

TIRIND

O

Not used (open)

32

LCDINH

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    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

NCO

O

Not used (open)

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) (LSW701, LSW909, LSW912 to LSW918)
6, 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    Not used (open)

50

DSTSEL1

I

Destination setting terminal (fixed at 3/4 voltage)

51

DSTSEL2

I

Destination setting terminal (US model: fixed at “H”, E model: frequency select switch input)

52

MTP

I

Not used (open)

53

VSM

I

FM and AM signal meter voltage detection input from the FM/AM tuner unit (TU1) (A/D input)

54

VCC

—

Power supply terminal (+5V)

55

RAMBU

I

56

POWSEL

I

Power select switch (SW500) input terminal    “L”: on (operation mode), “H”: off (halt mode)

57

EQ-SEL

I

Input terminal to check that RAM data are not destroyed due to low voltage

58

TESTIN

I

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

59

DOOR-IND

O

LED drive signal output of the illumination LED (LED701, 703)    “H”: LED on
“H” is output to turn on LED when front panel is opened

60

TIR-PLAY

O

Not used (open)

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 (IC400)    “H”: active

65

ATT

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 (IC400) and sub electrical volume (IC403)

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

Equalizer (or DSP) connect detection initial setting input from LINE OUT/IN SELECT switch
(SW400)    “L”: Equalizer (or DSP) is connected, “H”: not connected
When equalizer is connected, the fader is set to center, sub volume becomes same value as main
volume, and the set function is deleted

Internal RAM reset detection signal input from the RN5VD33AA (IC503)
Input terminal to check that RAM data are not destroyed due to low voltage
This checking is made within 100 msec after reset

– 80 –

Pin No.

Pin Name

I/O

Function

67

VOLCKO/      

SUBCKO

O

Serial data transfer clock signal output to the main electrical volume (IC400) and sub electrical 
volume (IC403)

68

SUBCE

O

Chip enable signal output to the sub electrical volume (IC403)    “H” active

69

FLASH-W

I

Internal flash memory data write mode detection signal input terminal    “L”: data write mode
Not used (fixed at “H” in this set)

70

RDSSI

I

Serial data input from the external device    Not used (open)

71

RDSCKI

I

Serial data transfer clock signal input from the external device    Not used (open)

72

RC-IN1

I

Rotary remote commander shift key input terminal    “L”: shift

73

X1A

O

Sub system clock output terminal (32 kHz)

74

X0A

I

Sub system clock input terminal (32 kHz)

75

DAVN

I

Not used (open)

76

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”

77

BU IN

I

Battery detect signal input from the SONY bus interface (IC504) and battery detect circuit
“L” is input at low voltage

78

ILL IN

I

Auto dimmer control illumination line detection signal input terminal
“L” is input at dimmer detection

79

TEL-ATT

I

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

80

NOSESW

I

Front panel block remove/attach detection switch (SW503) signal input terminal
“L”: front panel is attached

81

ACC IN

I

Accessory detect signal input terminal    “L”: accessory on

82 to 85

TIR-D0 to TIR-D3

O

Not used (pull down)

86

HSTX

I

Hardware standby input terminal    “L”: hardware standby mode    Reset signal input in this set

87

MD2

I

Setting terminal for the CPU operational mode (fixed at “L” in this set)

88

MD1

I

Setting terminal for the CPU operational mode (fixed at “H” in this set)

89

MD0

I

Setting terminal for the CPU operational mode (fixed at “H” in this set)

90

RESET

I

System reset signal input from the reset signal generator (IC505) and reset switch (SW701)
“L” is input for several 100 msec after power on, then it changes to “H”

91

VSS

—

Ground terminal

92

X0

I

Main system clock input terminal (3.68 MHz)

93

X1

O

Main system clock output terminal (3.68 MHz)

94

VCC

—

Power supply terminal (+5V)

95

TIR-BUSY

O

Not used (pull down)

96

TIR-WR

O

Not used (pull down)

97

TIR-CE

O

Not used (pull down)

98

BBE

O

Boost on/off control signal output to the NJM2150AM (IC409)

99

LO

O

Low-range boost control signal output to the NJM2150AM (IC409)

100

PRO

O

High-range boost control signal output to the NJM2150AM (IC409)

101

TIR-RD

O

Not used (pull down)

102

MTLIN

I

Not used (fixed at “L”)

103

AM STIN

I

AM detection signal input terminal    Not used (fixed at “L”)

104

LOCK

I

Mini-disc lock detection signal input from the MD mechanism controller (IC501)    “H”: lock
CLV lock status input in test mode

105 to108

POS0 to POS3

I

Not used (fixed at “L”)

109

MD MUTE

I

The audio muting control signal is input from the MD mechanism controller (IC501), and output 
to ATT (pin ^∞)

110

LM-LOD

O

Not used (pull down)

111

LINKOFF

O

Not used (pull down)

112

TAPE-ON

O

Not used (pull down)