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25

12. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.

Checking Procedure:
1. Load the continuously-recorded disc. (Refer to “5. CREATING

CONTINUOUSLY-RECORDED DISC”)

2. Turn the JOG dial to display “CPLAY MODE”.
3. Press the  YES/ENTER  button twice to display “CPLAY

MID”.

4. Press the  NO/CANCEL  button when “C1 = 

  AD = 

 ”

is displayed.

5. Turn the JOG dial to display “FBIAS CHECK”.
6. Press the  YES/ENTER  button to display “ 

 / 

 c = 

 ”.

The first four digits indicate the C1 error rate, the two digits
after “  /  ” indicate ADER, and the 2 digits after “c =” indicate
the focus bias value.
Check that the C1 error is below 50 and ADER is below 2.

7.  Press the  YES/ENTER  button and display “ 

 / 

 b = 

 ”.

Check that the C1 error is about 200 and ADER is below 2.

8. Press the  YES/ENTER  button and display “ 

 / 

 a = 

 ”.

Check that the C1 error is about 200 and ADER is below 2.

9. Press the  NO/CANCEL  button, then press the  Z  (MD)

button and take out the disc.

 If the C1 error and ADER are above other than the speci-

fied value at points A (step 8. in the above) or B (step 7. in
the above), the focus bias adjustment may not have been
carried out properly. Adjust perform the beginning again.

Set the CD test mode when performing confirmations.
After completing the confirmation, release the CD test mode.

In the CD test mode, the set works as following sequence.

2.

 CD

test mode 2

Press the

  x  

(CD) button

Press the

  x  

(CD) button

3. STOP mode 2

4. FOCUS mode

5. ALL SERVO

ON mode 

6.  LPC OFF 

mode

7. TRACKING 

GAIN UP mode 

8. High speed

mode

 

Press the

  u  

(CD) button

Press the

  u  

(CD) button

Press the  

x

  (CD) 

button.

Press the  

u 

,(CD) 

 

button.

 

 

 

 

Press the  

x

  (CD) 

button.

Press the  

x

  (CD) 

button.

Press the  

x

  (CD) 

button.

Press the  

x

  (CD) 

button.

Press the  

u 

,(CD) 

button.

Press the  

u 

,(CD) 

button.

Press the  

u 

,(CD) 

button.

Press the  

u 

,(CD) 

button.

Press the  

u 

,(CD) 

button.

1.

 CD

test mode 1

Enter the
CD test mode

CD test mode

26

2. STOP Mode 2
1. Press the  x  (CD) button to enter the STOP mode 2, and dis-

play as below.

Display

1. Entering the CD test Mode
1. Press   POWER   button to turn on the power.
2. Place CD into tray (TOC data of the CD will be read).
3. Press and hold  EDIT  button, then press CD buttons in the

following order:
  u  (CD)

t  x  (CD)t u  (CD)t  x  (CD)

4. All LED and LCD segments start flashing.
5. Press any button to stop flashing of LED and LCD segments and

to shoe the following display.

82

PGM

Display

Specified Value:
traverse level: 0.65 to 1.20 Vp-p

2. Press the  M  and  m button to move the optical pick-up to

position of the track where signal is recorded.

3. FOCUS Mode (Traverse Confirmation)
1. Press the  u  (CD ) button to enter the FOCUS mode and dis

play as below. (Focus servo ON. CLV-S, tacking and sled servo
OFF)

Display

F-

PGM

2. Connect an oscilloscope to TP (TE) and TP (VC) on the CD

board.

3. Confirm that the traverse level of waveform satisfy specified

value as follows.

Traverse Waveform

A

B

A = B

VC

traverse level: 

0.65 to 1.20 Vp-

81

PGM

21

41

TP

(RF)

TP

(VC)

TP(TE)

C731

C715

R718

J

R716

R719

R722

R721

R7

C726

R717

C730

R786

C720

C723

C712

C721

C722

C

R715

C714

C716

R713

Q702

R783

Q701

R708

IC702

JW724

JW701

10

JW719

JW7

0

JW715

JW720

[CD BOARD] (SIDE B)

TP (TE)

TP (VC)

oscilloscope
(DC  range)

P-

PGM

4. ALL SERVO ON Mode 1
(RF Level and Jitter Confirmation 1)
1. Press the  u  (CD) button four times to enter the ALL SERVO

ON
mode 1 (start playback the disc) and display as below.
(All servo ON. LPC ON)

Display

6. Press 

  x  (CD)button to enter CD test mode (STOP MODE 1)

and to show the following display.

88

PGM

Display

27

6. Releasing the CD Test Mode
1. Press the  x  (CD) button to stop rotate the disc.
2. Press the  POWER   button, then remove the power cord to

release the test mode.

Specified Values:
RF level : 1.1 to 1.3 Vp-p
jitteriless than 9nsec

P-

OF

        PGM

VOLT/DIV: 200 mV
TIME/DIV: 500 ns

RF level:
1.1 to1.3 Vp-p

5. LPC Mode
(RF Level and Jitter Confirmation 2)
1. Press the  u button to enter the LPC OFF mode and display

as below. (All servo ON. LPC OFF)

RF signal Waveform

21

41

TP

(RF)

TP

(VC)

TP(TE)

C731

C715

R718

J

R716

R719

R722

R721

R7

C726

R717

C730

R786

C720

C723

C712

C721

C722

C

R715

C714

C716

R713

Q702

R783

Q701

R708

IC702

JW724

JW701

10

JW719

JW7

0

JW715

JW720

[CD BOARD] (SIDE B)

TP (RF)

TP (VC)

oscilloscope
(DC  range)

2. Connect an osilloscope to TP (RF) and TP (VC) on the CD board.

3. Confirm that the RF level and jitter of waveform satisfy speci-

fiedvalues as follows.

Display

2. Confirm that the RF level and jitter of waveform satisfy speci-

fiedvalues as follows.

Specified Values:
RF level : 0.9 to 1.4 Vp-p
jitteriless than 9nsec

If the RF level and jitter are out of specified values, measure again
after clean the object lens by an applicator with lens cleaning liq-
uid.

28

1

MD–PDOWN

O

Power down signal output to the MD mechanism coutroller(IC601)

2

MD–SRTS

I

System controller busy status monitor input from the MD mechanism controller

3

MD–PACK IN

I

MO disc detection signal input

4

MD–SCTS

I

MD mechanism controller busy status monitor input from the MD mechanism controller

5

MD–RST

O

Power supply on /off control signal output for the MD mechanism controller

6

MD–H

O

MD play control signal output to the A/D, D/A converter(IC604)

7

REC–H

O

MD record signal output to the A/D, D/A converter (IC604)

8–10

—

Not used (OPEN)

11

B/L7V–SHORT

I

Backlight voltage detection input

12

—

Not used (OPEN)

13

CD–MUTE

—

Not used (OPEN)

14

AU–MUTE

O

Audio mute drive signal output

15–17

—

Not used (OPEN)

18

SUR–CTR

—

Not used (OPEN)

19, 20

—

Not used (OPEN)

21

MEGA BASS

O

MEGA–BASS ON/OFF signal output

22

HP–SW

O

Headphones ON/OFF signal output

23

AU–CS

O

Audio chip select signal output

24

AU–DATA

O

Serial data output to the electrical volume (IC302)

25

AU–CLK

O

Serial data transfer clock signal output

26–29

—

Not used (OPEN)

30

LEO–OPERATION2

—

Not used (OPEN)

31

PA–STANDBY

O

Power amplifier ON/OFF signal output “ L ” : standby “ H ” power ON

32

P–CON2

—

Not used (OPEN)

33

LINE–MUTE

O

Line mute drive signal output

34

TU–MUTE

—

Not used (OPEN)

35

SUR

O

Panorama sound  select signal output

36

LED–HIGHSPEED2

O

HIGHSPEED LED ON/OFF control signal output

37

LED–SURROUND2

O

Panorama sound LED ON/OFF control signal output

38

VDD–CONT

O

VDD 3.3V ON/OFF control signal output

39

TU–SFT

O

Level shift control signal output

40

RST

I

System reset signal input

41

VSS

—

Ground terminal

42

XTAL

I

Main system clock input terminal (8MHz)

43

EXTAL

O

Main system clock output terminal (8MHz)

44

—

Not used (OPEN)

45

LCD–STB

O

LCD standby signal output

46

LCD–DATA

O

LCD serial data output

47

LCD–CLK

O

LCD clock signal output

48

SELECT–GND

—

Not used (OPEN)

49

SELECT

—

Not used (fixed “ H ” )

50

LED–OPERATION

—

Not used (OPEN)

51

LEO–HISPEED

—

Not used (OPEN)

52

AVSS

—

Ground terminal

53

AVREF

—

Reference voltage (3.3V) input for A/D converter

54

AVDD

—

Power supply terminal(3.3V)

55

KEY–AD1

I

Key input terminal

56

KEY–AD0

I

Key input terminal

57

JOG–B

I

Jog controller (B) input