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– 89 –

•

Pin No.

Pin Name

I/O

Function

1 to 5

TIN3 to TIN7

I/O

Input of the 4

×

8 matrix test keys (“L” is always output, except in test mode)     Not used (open)

6

LOAD

O

Loading motor control signal output to the motor driver (IC305)    *1

7

EJECT

O

Loading motor control signal output to the motor driver (IC305)    *1

8, 9

NCO

O

Not used (open)

10

MDMON

O

Power supply on/off control signal output of the MD mechanism deck section main power supply
and loading motor drive (IC305) power supply    “H”: power on

11

E-SW

I

Inputs the disc loading completion detect switch detection signal
“L”: When completed of the disc loading operation

12

AG-OK

O

Output of aging status in test mode    “H”: aging completed, “L”: under aging    Not used (open)

13

ADJ-OK

O

Output of status when aging completed in test mode    “H”: aging OK, “L”: aging NG
Not used (open)

14 to 17

NCO

O

Not used (open)

18

DFCTSEL

I

Select whether defect function is used for the CXD2652AR (IC301)
“H”: not used this function, “L”: used this function (fixed at “H” in this set)

19

DPLLSEL

I

Select whether digital pll function is used for the CXD2652AR (IC301)
“H”: not used this function, “L”: used this function (fixed at “H” in this set)

20

EMPHSEL

I

Select whether emphasis signal output from pin or unilink data
“H”: output from pin only, “L”: outputs from both pin and unilink data (fixed at “H” in this set)

21

LOCK

O

Mini-disc lock detection signal output to the master controller (IC500)    “H”: lock

22

NCO

O

Not used (open)

23

2M/4M

I

Select whether D-RAM capacitance 2M bit or 4M bit    “H”: 2M bit (internal D-RAM of IC301
CXD2652AR), “L”: 4M bit (external D-RAM) (fixed at “L” in this set)

24, 25

NCO

O

Not used (open)

26

MNT0

I

Focus OK signal input from the CXD2652AR (IC301)
“H” is input when focus is on (“L”: NG)

27

MNT1

I

Track jump detection signal input from the CXD2652AR (IC301)

28

MNT2

I

Monitor 2 signal input from the CXD2652AR (IC301)

29

MNT3

I

Monitor 3 signal input from the CXD2652AR (IC301)

30

RESET

I

System reset signal input from the master controller (IC500), reset signal generator (IC505) and
reset switch (SW701)    “L”: reset    For several hundreds msec. after the power supply rises, “L”
is input, then it changes to “H”

31

EXTAL

O

Main system clock output terminal (10 MHz)

32

XTAL

I

Main system clock input terminal (10 MHz)

33

VSS

—

Ground terminal

34

TX

O

Sub system clock output terminal (32.768 kHz)    Not used (open)

35

TEX

I

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

36

AVSS

—

Ground terminal (for A/D converter)

37

AVREF

I

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

38

INIT

I

Initial reset signal input terminal (A/D input) (fixed at “H”)

39

TEMP

I

Temperature sensor (TH501) input terminal (A/D input)

40

ACNT

I

Select the number of load/eject aging times (A/D input)
0H – 54H (30 times), 55H – OA9H (20 times), OAAH – OFFH (10 times)

41

DO-SEL

I

Select the digital output bits (A/D input)

42

EE-CS

O

Chip select signal output to the external EEPROM device    Not used (open)

43

EE-CKO

O

Serial data transfer clock signal output to the external EEPROM device    Not used (open)

44

EE-SIO

I/O

Two way data bus with the external EEPROM device    Not used (open)

45

MD-SO

O

Writing serial data signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

46

LINKOFF

O

Unilink on/off control signal output to the SONY bus interface (IC504)
“H”: link off, “L”: link on

– 90 –

Pin No.

Pin Name

I/O

Function

47

UNIREQ

O

Data request signal output terminal (for SONY bus)    “H”: request on    Not used (open)

48

UNICKI

I

Serial data transfer clock signal input from the master controller (IC500) (for SONY bus)

49

UNISI

I

Serial data input from the SONY bus interface (IC504)

50

UNISO

O

Serial data output to the SONY bus interface (IC504)

51

MD-CKO

O

Serial data transfer clock signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

52

MD-SI

I

Reading serial data signal input from the CXD2652AR (IC301)

53

NCO

O

Not used (open)

54

SENS

I

Internal status (SENSE) input from the CXD2652AR (IC301)

55

CC-XINT

I

Interrupt status input from the CXD2652AR (IC301)

56

LIMIT-IN

I

Detection input from the sled limit-in detect switch
The optical pick-up is inner position when “L”

57

EJT-KEY

I

Eject request signal input terminal    “L”: eject on    Not used (fixed at “H”)

58

ERROR-PWM

O

PWM error monitor output terminal (C1and ATER is output when test mode)    Not used (open)

59

MD-RST

O

Reset signal output to the D/A converter (IC101), CXD2652AR (IC301) and BH6511FS (IC303)
“L”: reset

60

BU-IN

I

Battery detect signal input from the SONY bus interface (IC504) and battery check circuit
“H”: battery on

61

BUS-ON

I

SONY bus on/off control signal input from the master controller (IC500)    “L”: bus on

62

SQSY

I

Subcode Q sync (SCOR) input from the CXD2652AR (IC301)
“L” is input every 13.3 msec    Almost all, “H” is input

63

C-SW

I

Inputs the disc loading start or disc eject completion detect switch detection signal
“L”: When start or eject completed of the disc loading operation

64

MD-LAT

O

Serial data latch pulse signal output to the CXD2652AR (IC301) and CXA2523R (IC302)

65

MD-ON

O

Power supply on/off control signal output of the MD mechanism deck section main power supply
“H”: power on

66

DEEMP

O

Emphasis on/off control signal output to the D/A converter (IC101)    “H”: emphasis on

67

A-MUTE

O

Audio muting on/off control signal output to the master controller (IC500)    “H”: muting on

68

NCO

O

Not used (open)

69

TSTCKO

O

Output of clock signal for the test mode display    Not used (open)

70

TSTSO

O

Output of data for the test mode display    Not used (open)

71

TSTMOD

I

Setting terminal for the test mode    “L”: test mode, “H”: normal mode

72

VCC

—

Power supply terminal (+5V)

73

NC

I

Not used (fixed at “H”)

74 to 77

TOUT0 to TOUT3

O

Output of the 4

×

8 matrix test keys     Not used (open)

78 to 80

TIN0 to TIN2

I/O

Input of the 4

×

8 matrix test keys (“L” is always output, except in test mode)     Not used (open)

*1  Loading motor (M903) control

LOAD (pin 6)

“H”

“L”

“H”

“L”

EJECT (pin 7)

“L”

“H”

“H”

“L”

Terminal

Operation

IN

OUT

BRAKE

STOP

– 91 –

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 and accessories and

packing materials are 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

#2

#2

#1

#1

Front panel section

#4

#4

#4

#4

F1

A

C

B

A

B

C

#4

MG-164KE-138

#2

D

D

1

X-3375-471-1 PANEL ASSY, SUB

2

3-025-483-01 DOOR (MD)

3

3-025-484-01 SPRING (DOOR)

4

3-022-338-01 BUTTON (EJECT) (

6)

* 5

1-671-080-11 SUB TRANSLATION BOARD

6

X-3375-068-1 LOCK ASSY

7

3-341-752-11 WASHER, POLYETHYLENE

8

3-011-170-01 GEAR (HOLDER)

9

3-953-235-01 DAMPER, OIL

10

X-3375-066-1 BRACKET (GEAR) ASSY

11

3-915-923-01 SCREW, GROUND POINT

* 12

A-3294-510-A MAIN BOARD, COMPLETE (AEP, UK)

* 12

A-3294-513-A MAIN BOARD, COMPLETE (German)

* 13

3-011-078-01 BRACKET (POWER IC)

* 14

3-029-078-01 HEAT SINK

* 15

3-022-317-01 BRACKET (AMP)

* 16

3-026-537-01 BRACKET (AUDIO)

* 17

3-025-481-11 HEAT SINK

* 18

3-022-316-31 COVER

19

3-932-860-01 SCREW (2.6X4) (C TIGHT), +PTT

* 20

A-3294-511-A AUDIO BOARD, COMPLETE

* 21

3-028-408-01 PLATE (2), SHIELD

* 22

3-024-952-01 SHEET, INSULATING

* 23

X-3375-753-1 CHASSIS ASSY

24

1-776-527-71 CORD (WITH CONNECTOR) (ISO) (POWER)

25

3-339-410-01 COVER (2), PIN JACK

26

1-783-862-41 CORD (WITH CONNECTOR) (RCA)

(FRONT AUDIO OUT, BUS AUDIO IN)

27

1-783-862-31 CORD (WITH CONNECTOR) (RCA)

(REAR AUDIO OUT, SUB WOOFER OUT)

28

3-011-999-01 CUSHION (MD)

29

3-713-786-51 SCREW +P 2X3

* 30

3-355-209-01 PLATE (B), GROUND

31

1-475-982-11 MICROPHONE UNIT

32

X-3375-861-1 HOLDER (MIC) ASSY

F1

1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A)

– 92 –

Ref. No.

Part No.

Description

Remark

Ref. No.

Part No.

Description

Remark

#11

not supplied
(KEY board)

not supplied

LCD900

EL900

not supplied

51

X-3375-960-1 PANEL SUB ASSY, FRONT

52

3-022-332-01 BUTTON (10 KEY)

(SHIFT. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10)

53

3-022-329-01 BUTTON (SOURCE)

54

3-022-322-01 KNOB

55

3-022-323-01 LEVER (SHUTTLE)

(+ 

+ ). 0 = –. SEEK/AMS)

56

3-022-324-01 PLATE (SHUTTLE), LIGHT GUIDE

57

3-022-330-11 BUTTON (MODE) (MODE. OFF)

58

3-022-325-01 PLATE (RING), LIGHT GUIDE

59

3-022-331-01 BUTTON (SOUND) (SOUND. DSPL)

60

3-932-225-01 SPRING (OPEN)

61

3-022-333-01 BUTTON (OPEN)

62

3-022-308-01 BUTTON (PTY) (PTY. AF/TA. TIR)

* 63

3-022-327-01 PLATE (LCD), GROUND

64

1-694-414-11 CONDUCTOR BOARD, CONNENTION

(RUBBER CONNECTOR)

* 65

3-022-328-01 ILLUMINATOR (LCD)

* 66

3-022-326-01 PLATE (LCD), LIGHT GUIDE

67

3-017-983-01 CUSHION (10)

68

3-327-119-01 SPACER (A)

69

3-010-999-01 BEARING (L)

70

3-010-998-01 SPRING (BEARING)

71

3-011-000-01 BEARING (R)

72

3-022-319-01 PANEL, FRONT BACK

EL900

1-517-766-11 LIGHT, ELECTRO LUMINESCENT

LCD900 1-803-107-11 DISPLAY PANEL, LIQUID CRYSTAL