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– 37 –

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µ

Pin No.

Pin Name

I/O

Function

1, 2

NC

O

Not used (open)

3

LED LAT

O

Serial data latch pulse output to the LED driver (IC602)    “L” active

4

DRV CS

O

Chip select signal output to the fluorescent indicator tube driver (IC601)    “L” active

5

RE

O

Data read enable signal output to the S-RAM (IC315)    “L” active

6

WE

O

Data write enable signal output to the S-RAM (IC315)    “L” active

7

DRV RST

O

Reset signal output to the fluorescent indicator tube driver (IC601) and LED driver (IC602)            
“L”: reset

8

NC

O

Not used (open)

9

VDD

—

Power supply terminal (+5V)

10

BD RST

O

Reset signal output to the BD section    “L”: reset

11

BD PWR

O

Power on/off control signal output for the BD section power supply    “L”: power on                       
Not used (open)

12, 13

NC

O

Not used (open)

14

LD OUT

O

Motor control signal output to the loading motor driver (IC371)    “L” active      *1

15

LD IN

O

Motor control signal output to the loading motor driver (IC371)    “L” active      *1

16

STK DW

O

Motor control signal output to the elevator up/down motor driver (IC371)    “L” active      *2

17

STK UP

O

Motor control signal output to the elevator up/down motor driver (IC371)    “L” active      *2

18

OUT SW

I

Detection input from the disc tray open/close detect switch (SW505)                                                
“L”: disc tray is open, “H”: disc tray is close

19

IN SW

I

Detection input from the disc tray open/close detect switch (SW505)                                                
“L”: disc tray is close, “H”: disc tray is open

20

STK SW

I

Detection input from the stocker switch (SW501)                                                                               
“L”: when sub tray is completely set into the stoker

21

MID SW

I

Detection input from the mid switch (SW504)                                                                                    
“L”: when sub tray is at the position where it between removed tray and set into the stoker

22

TEST

I

Input terminal for the test (fixed at “L” in this set)

23

INIT SW

I

Detection input from the init switch (SW502)                                                                                     
“L”: when disc tray is at the position where it can be play

24

CNT SW

I

Detection input from the count switch (SW503)                                                                                  
“L”: when elevator is at the position where it each sub tray stock position

25

PANEL SW

I

Detection input from the CD tray open/close detect switch (S671)                                                     
“L”: CD panel close, “H”: CD panel open

26

(GND)

I

Not used (fixed at “L”)

27

ADJ

I

Input terminal for the CD test mode setting    “L”: test mode, normally: “H”

28

AMUTE

O

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

29

DATA

O

Serial data output to the CXD2519Q (IC103) in BD section

30

CLK

O

Serial data transfer clock signal output to the CXD2519Q (IC103) in BD section

31

XLT

O

Serial data latch pulse output to the CXD2519Q (IC103) in BD section    “L” active

32

BUSCLK

I

Bus data reading clock signal input for the system control bus

33 to 36

BUSD0 to 

BUSD3

I/O

Two-way data bus with the system control bus

37

VDD

—

Power supply terminal (+5V)

38

X2

O

Main system clock output terminal (12.5 MHz)

*1  Loading motor (M502) control

*2  Elevator up/down motor (M501) control

Function

Function

Terminal  

Terminal

LD IN (pin !∞)

“L”

“H”

“H”

“L”

STK UP(pin !¶)

“L”

“H”

“H”

“L”

LD OUT (pin !¢)

“H”

“L”

“H”

“L”

STK DW (pin !§)

“H”

“L”

“H”

“L”

IN

OUT

BRAKE

RUN 

IDLE

UP

DOWN

BRAKE

RUN 

IDLE

– 38 –

Pin No.

Pin Name

I/O

Function

39

X1

I

Main system clock input terminal (12.5 MHz)

40

VSS

—

Ground terminal

41

XT2

O

Sub system clock output terminal    Not used (open)

42

XT1

I

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

43

RESET

I

System reset signal input from the reset signal generator (IC311)    “L”: reset                                   
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”

44

BUSCLK

O

Bus data transfer clock signal output for the system control bus

45

BUSBSY

I/O

Busy signal in/out terminal for the system control bus

46

SCOR

I

Subcode sync (S0+S1) detection signal input from the CXD2519Q (IC103) in BD section

47

DQSY

I

Data read enable signal input from the CD text decoder (IC104) in BD section

48

NC

O

Not used (open)

49

JOG0

I

Jog dial pulse (0) input from the rotary encoder (S661) (for SELECTOR)

50

JOG1

I

Jog dial pulse (1) input from the rotary encoder (S661) (for SELECTOR)

51

AVDD

—

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

52

AVREF0

I

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

53

KEY0

I

Key input terminal (A/D input) (S611 to S613, S616 and S618)                                                         
CD1 to CD3, REPEAT, CLEAR keys input

54

KEY1

I

Key input terminal (A/D input) (S621 to S623, S626 to S628)                                                           
§ (CD1 to CD3), MENU/NO, ENTER/YES, DISC SKIP keys input

55

KEY2

I

Key input terminal (A/D input) (S631 to S638)                                                                                   
fl, p, 0, ), DISPLAY, CONTINUE, SHUFFLE, PROGRAM keys input

56

SELECT0       

(CDTEXT)

I

Input terminal for the Japanese letter in function setting                                                                     
“L”: input possible (fixed at “H” in this set)

57

SELECT1      

(MECHA MODEL)

I

Input terminal for the separate/complete type setting of CD section and other sections                     
“L”: separate type, “H”: complete type (fixed at “L” in this set)

58

DISC SNS

I

Detection input from the disc in detect sensor (Q501)    “H”: disc in

59

MID SNS

I

Detection input from the disc tray close detect sensor (IC501)    “H”: disc tray is closed

60

(GND)

I

Not used (fixed at “L”)

61

AVSS

—

Ground terminal (for A/D converter)

62

TEST

I

Input terminal for the test (fixed at “L” in this set)

63

NC

O

Not used (open)

64

AVREF1

I

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

65

SRDT

I

Serial data input from the CD text decoder (IC104) in BD section

66

NC

O

Not used (open)

67

SCLK

O

Serial data transfer clock signal output to the CD text decoder (IC104) in BD section

68

SUBQ

I

Subcode Q data input from the CXD2519Q (IC103) in BD section

69

NC

O

Not used (open)

70

SQCLK

O

Subcode Q data reading clock signal output to the CXD2519Q (IC103) in BD section

71

XMODE

O

Reset/power down mode setting signal output to the CD text decoder (IC104) in BD section

72

SENSE2

I

Internal status monitor input from the CXA1992AR (IC101) in BD section

73

SENSE

I

Internal status monitor input from the CXD2519Q (IC103) in BD section

74

DRV DAT

O

Serial data output to the fluorescent indicator tube driver (IC601) and LED driver (IC602)

75

DRV CLK

O

Serial data transfer clock signal output to the fluorescent indicator tube driver (IC601) and LED 
driver (IC602)

76 to 83

A0 to A7

O

Address signal output to the S-RAM (IC315)

84 to 91

D0 to D7

I/O

Two-way data bus with the S-RAM (IC315)

92 to 98

A8 to A14

O

Address signal output to the S-RAM (IC315)

99

NC

O

Not used (open)

100

VSS

—

Ground terminal

– 39 –

1

IC101 

#£

 (RF O) (CD PLAY)

Approx. 

1.2 Vp-p

2

IC101 

$∞

 (TEO) (CD PLAY)

Approx. 

180 mVp-p

3

IC101 

1

 (FEO) (CD PLAY)

4

IC103 

@¶

 (MDP) (CD PLAY)

Approx. 

280 mVp-p

2.4 Vp-p

7.6 

µ

s

6

IC103 

^º

 (XPCK)

7

IC103 

*ª

 (XTAI)

8

IC103 

&¢

 (WFCK)

5

IC103 

^™

 (RFCK)

4.9 Vp-p

136 

µ

s

5 Vp-p

230 ns

80 mVp-p

16.9344 MHz

5 Vp-p

136 

µ

s

1

IC601 

@¡

 (XIN)

2

IC601 

@º

 (XOUT)

1

IC103 

#ª

 (X1)

3 Vp-p

12.5 MHz

750 mVp-p

Approx. 740 kHz

4.7 Vp-p

Approx. 753 kHz

– 40 –

The components identified by
mark 

! or dotted line with mark

! are critical for safety.

Replace only with part number
specified.

• Items marked “*” are not stocked since they

are seldom required for routine service. Some
delay should be anticipated when ordering
these items.

• The mechanical parts with no reference num-

ber in the exploded views are not supplied.

• Hardware (# mark) list is given in the last of

the electrical parts list.

NOTE:

• -XX and -X mean standardized parts, so they

may have some difference from the original
one.

• Color Indication of Appearance Parts

Example:
KNOB, BALANCE (WHITE) . . . (RED)

↑

↑

Parts Color Cabinet's Color

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

1

4-977-699-11 LEG (F)

2

4-988-161-01 SPRING, RING

3

4-995-074-01 KNOB (JOG)

4

X-4949-032-1 PANEL ASSY, FRONT

5

4-962-708-01 EMBLEM (4-A), SONY

6

X-4949-035-1 LID ASSY

* 7

1-667-599-11 LED BOARD

* 8

A-4724-093-A PANEL BOARD, COMPLETE

9

3-363-099-01 SCREW (CASE 3 TP2)

10

4-977-698-11 CASE

* 11

4-995-118-11 PANEL (CD), BACK (EX880)

* 11

4-995-118-21 PANEL (CD), BACK (MS717)

* 12

1-667-598-16 JACK BOARD

* 13

A-4724-092-A MAIN BOARD, COMPLETE

14

4-965-822-01 FOOT

15

4-951-620-41 SCREW (2.6), +BVTP

16

1-783-102-11 WIRE (FLAT TYPE) (5 CORE)

17

1-783-104-11 WIRE (FLAT TYPE) (17 CORE)

18

1-783-105-11 WIRE (FLAT TYPE) (23 CORE)

19

1-783-103-11 WIRE (FLAT TYPE) (11 CORE)

20

4-989-453-01 CUSHION (LID)

#2

#2

#1

#1

#1

#2

CDM48B-5BD29

not supplied

not supplied

#1