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– 21 –

+

–

oscilloscope
(DC range)

TP (TEO)

BD (CD) board

TP (VC)

Procedure :
1. Connect TP ADJ (IC301 @• pin) to ground with lead wire on Main

board.

2. Connect oscilloscope to test point TP (VC) and TP (TEO) on BD

(CD) board.

3. Turned Power switch on.
4. Put disc (YEDS-18) in and press the  

^ button.

5. Confirm that the osilloscope waveform is symmetrical on the

top and bottom in relation to 0V, and check this level.

specified value : 

r

  A–B

2 (A+B)

X100 = less than 

±

 7%

r

 

A+B = 300 

±

 100mVp-p

level : 300 

±

 100mVp-p

A

B

0V

Traverse waveform

6. Remove the lead wire connected in step 1.

This gain has a margin, so even if it is slightly off. There is no prob-
lem.
Therefore, do not perform, this adjustment.
Please note that it should be fixed to mechanical center position when
you moved and do not know original position.

 

(CD) BOARD]  (Conductor side)

RF

FOK

IC102

IC101

IC104

RV101

RV103

RV102

TE1

FE1

FEO

TEO

VC

PCK

GND

– 22 –

1

VC

O

Output terminal for the center point voltage (+1.4V) generated.

2 – 7

A– F

I

Signal input from detector circuit in the optical pick-up block.

8

FI

I

Signal (–) input of the operational amplifier for F signal.

9

FO

O

Signal output of the operational amplifier for F signal.

10

PD

I

Front monitor.

Connected to the photo diode.

11

APCREF

I

Input terminal for the setting of laser power.

12

TEMPI

I

Terminal for the connection to temperature sensor.

13

GND

–

Ground terminal.

14

AAPC

O

LD amplifier output terminal of APC circuit.

15

DAPC

O

Not used. (Open)

16

TEMPR

O

Output terminal of thr reference voltage for temperature sensor.

17

XRST

I

Reset signal input from the system controller (IC201).

When reset : “L”

18

SWDT

I

Write data signal input from the system controller (IC201).

19

SCLK

I

Clock signal input from the system controller (IC201).

20

XLAT

I

Latch signal input from the system controller (IC201).

21

VREF

O

Reference voltage output.

Not used this set (Open)

22

TENV

O

Not used. (Open)

23

THLD

I

Not used. (Connected to the VC)

24

VCC

–

Power supply terminal. (+5V)

25

TFIL

I

Not used. (Open)

26

TE

O

Tracking error signal output to CXD2535BR (IC121).

27

TLB

I

Input terminal of the adder signal to tracking error.

28

CSLED

I

Terminal for the sled error lowpass filter.

29

SE

O

Sled error signal output to CXD2535BR (IC121).

30

ADFM

O

FM signal output terminal of the ADIP.

31

ADIN

I

Input terminal by AC coupling is FM signal of the ADIP.

32

ADAGC

I

External capacitor connect terminal for AGC of the ADIP.

33

ADFG

O

ADIP double turned FM signal output to CXD2535BR (IC121). (22.05kHz±1kHz)

34

AUX

O

Sub signal output to CXD2535BR (IC121).

35

FE

O

Focus error signal output to CXD2535BR (IC121).

36

FLB

I

Not used. (Open)

37

ABCD

O

Light amount signal output to CXD2535BR (IC121).

38

BOTM

O

Light amount bottom hold signal output to CXD2535BR (IC121).

39

PEAK

O

Light amount peak hold signal output to CXD2535BR (IC121).

40

PFAGC

I

External capacitor connect terminal of AGC circuit for the RF.

41

RF

O

Playback EFM RF signal output to CXD2535BR (IC121).

42

ISET

I

Setting terminal for the internal circuit constant.

22kHz, BPF center frequency

43

AGCT

I

Input terminal by AC coupling is RF signal.

44

RFO

O

RF signal output terminal.

45

MORFI

I

Input terminal by AC coupling is RF signal of the MO.

46

MORFO

O

RF signal output terminal of the MO.

47,48

I,J

I

Signal input from detector circuit in the optical pick-up block.

– 23 –

1

C. SET1

I

Not used this set. (Fixed at “L”)

2

C. SET0

I

Not used this set. (Fixed at “L”)

3

KEY3

I

Key input terminal. Not used this set (Fixed at “L”)

4 – 6

KEY2–KEY0

I

Key input terminal. Not used this set (Fixed at “L”)

7

I

Not used this set. (Fixed at “L”)

8

XINT

I

Interruption status input from CXD2536R (IC271).

9

SENS

I

Internal status (SENSE) input from CXD2535BR (IC121).

10

SHCK

I

Track jump signal input from CXD2535BR (IC121).

11

AUBK

I

Audio bus signal input. (Not used this set)

–––

12

S/A

O

Sircs remote controller/audio bus selection signal output. (Not used this set)

13

BEEP SW

I

Not used this set. (Fixed at “L”)

––––––––––

14

REC/OTHER

O

When recording :“L”, Other : “H” (Not used this set).

15

BEEP

O

Buzzer signal output. (Not used this set)

16

F. BIAS/C2

I

Not used this set. (Fixed at “L”)

17

GND (CNVSS)

–

Ground terminal.

18

SYSTEM RST

I

System reset signal input. “H” after several hundred ms of “L” after power start-up.

19

XIN T

I

Not used this set. (Fixed at “L”)

20

XOUT T

O

Not used this set. (Fixed at “L”)

21

GND

–

Ground terminal.

22

XIN

I

8MHz crystal oscillator input.

23

XOUT

O

8MHz crystal oscillator output.

24

+5V

–

Power supply terminal. (+5V)

25

STB

O

Strobe signal output to the power supply circuit. When power ON :“H”, When standby : “L”

26, 27

MIC SW

I

Not used this set. (Fixed at “L”)

28

BUS OUT

O

Not used this set. (Fixed at “L”)

29

I

Not used this set. (Fixed at “L”)

30, 31

LED2, LED1

I

Not used this set. (Fixed at “L”)

32

LED0

O

Not used this set. (Fixed at “L”)

33

C1

I

Not used this set. (Fixed at “L”)

34

ADER

I

Not used this set. (Fixed at “L”)

35

N. C.

I

Not used this set. (Fixed at “L”)

36

MASTER/SLAVE

I

Not used this set. (Fixed at “H”)

37, 38

JOG1, JOG0

I

Not used this set. (Fixed at “L”)

39

SDA

I/O

Backup memory (IC171) data bus.

40

SCL

O

Clock signal output to the Backup memory (IC171).

41

POWER DOWN

I

Power down detection input. Normally : “H” input

42

REMOCON

I

Remote control signal input. Not used this set (Fixed at “L”)

43

ATSY

I

ATP address sync or sub-code Q sync (SCOR) input from CXD2535BR (IC121).

“L” every 13.3msec, Almost “H”

44

DQSY

I

Input the U-bit CD format sub-code Q sync (SCOR) of the digital in from CXD2535BR (IC121).

“L” every 13.3msec, Almost “H”

45 – 48

I

Not used this set. (Fixed at “L”)

49

SCLK

O

Clock signal output to the serial bus.

– 24 –

50

SWDT

O

Write data signal output to the serial bus.

51

SRDT

I

Read data signal input to the serial bus.

52

I

Connected to the pin %¡.

53

FLCLK

O

Serial clock signal output to the display driver (IC701). Not used this set (Fixed at “L”)

54

FLDATA

O

Serial data signal output to the display driver (IC701). Not used this set (Fixed at “L”)

55

FLCS

O

Chip select signal output to the display driver (IC701). Not used this set (Fixed at “L”)

56

I

Not used. (Fixed at “L”)

57

TEST0

I

Terminal for test. (Fixed at “L”)

58

TEST1

O

Reset signal output to  CXD2536R (IC271).

59, 60

I

Not used. (Fixed at “L”)

61

AFAST

I

Not used this set. (Fixed at “L”)

––––

62

16/18

I

16bit/18bit selector. “H” : 16bit

63

LDON

O

Laser ON/OFF control signal output.When laser ON : “H”

64

P/GROOVE

I

PIT/GROOVE detection input.“H”  : Disc for playing and TOC area.

Not used this set (Fixed at “L”)

65

FOK

I

Focus OK signal input from CXD2535BR (IC121). “H”  is input when the focus is applied.

66

MON

I

Not used this set. (Input and the pull-down)

67

LOCK

O

Not used this set. (Output and the pull-down)

68

WRPWR

O

Laser power selection signal output to the optical pick-up block and CXD2535BR (IC121).

69

DIG RST

O

Reset signal output to CXA1981R (IC101), CXD2535BR (IC121), and the motor driver

(IC151).When reset : “L”

70

DA RST

O

Reset signal output to D/A converter (IC341) and the A/D converter (IC301).

When reset : “L”

71, 72

SCMD 1, SCMD 0

O

Serial command control mode signal output to CXD2536R (IC271).

73

MOD

O

Laser modulation selection signal output.

When playback power : “L”,When stop :  “H”

When recording power :

0.5S

2S

74

REC/PB

O

Recording/playback selection signal output to CXD2535BR (IC121).

When recording : “H” ,When playback : “L”

75

WR/MN

O

Write/monitor mode selection signal output to CXD2536R (IC271).

76

SCTX

O

Writing data transmission timing output to CXD2536R (IC271).

Used together with the magnetic field head ON/OFF output.

77

XLATCH

O

Latch signal output to the serial bus.

78

DFLATCH

O

Latch signal output to the D/A converter (IC341).

79

DFMUTE

O

Muting signal output. Not used this set. (Connected to the Ground)