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— 17 —

With the power turned off (standby state), press the POWER button
while pressing the 

P (pause) button.

All FL segments and grids light up together with the 

· (play),

P (pause), and standby LEDs.
At the same time, the GROUP LEDs are scanned one by one.

Note: To exit this mode, press the POWER button.

1. Turn ON the power of the unit, set disc to disc table, and per-

form chucking.

2. Disconnect the power supply plug from the outlet.
3. To set ADJ mode, connect the test point (TP301: ADJ) of the

MAIN board to Ground, and connect the power supply plug to
the outlet.

The power will turn on automatically, and the first track will be
played.
In this mode, table rotation and loading operations are not performed
because it is taken that the disc has already been chucked.

Note: The same operations are also performed in the following when

the test point (TP301: ADJ) is connected to Ground after turn-
ing on the power.

• Direct search (movement of sledding motor) is not performed dur-

ing accessing

• Ignored even when GFS becomes L
• Ignored even when the Q data cannot be read
• Focus gain does not decrease
• Spindle gain does not decrease
• Servo related settings can be set manually and checked (Refer to

ADJ Mode Special Functions Table)

Button

Function

GROUP 1 (1)

GROUP 2 (2)

GROUP 3 (3)

GROUP 4 (4)

GROUP 5 (5)

GROUP 6 (6)

GROUP 7 (7)

GROUP 8 (8)

(9)

(10/0)

CHECK

CLEAR

Increases the focus bias in 8 steps.

Sets the focus bias in the middle of aliasing.

Turns off the tracking and sledding servo

Returns the auto gain to the initial value (30)

Turns off the focus servo

Decreases the focus bias in 8 steps.

Re-adjusts the focus bias

Turns on the tracking and sledding servo

Switches the focus servo gain between normal and down

FG. norm: normal, FG. down: down

Sets the focus bias to 0 (no bias)

Next, displays the jitter measured at the focus bias set

S-curve observation mode

Automatic eccentric measurement

The results of measurement is displayed in 

µ

m directly.

Servo average display
Displays VC, FE, RF, TE and traverse in hexadecimal
numbers

Focus bias display

Each time this is pressed, the focus bias is switched
between 1 and 2

(1)
Bias actually set     Optimum bias     Minimum jitter
(2)
U:Upper aliasing bias     L:Lower aliasing bias

Auto gain display

Displays focus, tracking, sledding in hexadecimal
numbers

PROGRAM

SHUFFLE

CONTINUE

1. Connect the test point (TP302:AFADJ) of the main board to the

GND, and insert the power plug to the outlet to set this mode.
First, the external SRAM is checked, and if abnormal, “SRAM
NG” is displayed.
If OK, the following steps are performed.

* Fluorescent Display Tube Check Mode

The whole fluorescent display tube lights up when the con-
nection in step 1 is made.

* Key Check Mode

This mode is set when a button is pressed after the whole fluo-
rescent display tube lights.
All buttons have a button number.
When a button is pressed, the counter display is counted up,
and the number of that button is displayed.
However, the counter display will only count up to 24, but the
number of buttons pressed will always be displayed.

24

0

0

Counter display

Button number display

POWER

GROUP 4

GROUP 3

GROUP 2

GROUP 1

GROUP 5

GROUP 6

GROUP 7

ENTER

REPAT

PROGRAM

SHUFFLE

CONTINUE

TIME/TEXT

GROUP 8

≠

MEMO SEARCH

INPUT

±

CHECK

CLEAR

·

P

p

TIMER

Button No. Displayed

Button

0

1

2

3

4

5

6

7

9

10

11

12

13

14

15

21

22

23

24

25

26

All lit (LED lit)

Partial lighting 1 (LED lit)

Partial lighting 2

When the TIMER switch is set to OFF, “0” is dis-
played at the top right of the fluorescent display tube.
When set to ON, “1” is displayed.lit while pressed
(grid check).)

• When the jog dial is rotated to the right, the

GROUP LEDs light up in the order of 1

n2..8n1.

• When the jog dial is rotated to the left, the GROUP

LEDs light up in the order of 8

n7..1n8.

DISC/

CHARACTER

— 18 —

The standby LED lights up when the door switch is shut.

A B C D E F G

0

0

[ MAIN BOARD ] — Component Side —

TP302
AFADJ

TP301
ADJ

IC201

CN302

CN303

CN301

• Mode which repeatedly changes and plays back discs automati-

cally in the unit.

• It will repeat aging as long as no errors occur.
• If an error occurs during aging, it will stop all servos, motors, etc.

instantaneously, display the error number, and stop operations.
However, the stopping conditions differ according to whether the
unit is equipped with the “self-protection function during errors”
described later.
The function serves to maintain the state of the unit when errors
occur.

$

$

$

1. Disc change

2. Load in

3. TOC read

4. Access of last track

5. 3 second playback

6. Access of first track

7. 3 second playback

8. Load out

$

$

$

$

$

$

 (1 cycle takes 3 minutes)

$

$

$

1. No. 40

2. No. 120

3. No. 80

4. No. 200

5. No. 160

$

$

$

Special Functions in Aging Mode

1 Disc setting mode:

5 discs are set before setting the aging mode. This mode makes
the setting of these discs more easy.

2 Self protection function during errors:

Function which voluntarily corrects errors which occur during
normal operations by retries.
If this function is not provided, all operations will be stopped
without retiring. It is suitable for checking errors with low re-
producibility.
If this function is provided, and errors can be corrected by re-
tries, aging will be continued without stopping.

3 Aging cycle count function:

Functions which displays the number of agings carried out on
the Fluorescent indicator tube  in numbers. One aging cycle con-
sists of five discs.

number of agings

1DISC

CD1

DISC

2

*

DISC-40

*

— 19 —

1. Change the  COMMAND MODE  switch (S501) on set to

 CD1 .

2. Turn ON the power of the unit. Open the front cover.
3. Press the AGING START button of the remote commander for

aging mode (J-2501-123-A).

4. When the disc set mode is set, the 

· and P LEDs blink.

5. Rotate the JOG dial. The slits (No. 40, 80, 120, 160, 200) for

setting the discs will come forward. Insert the discs into these
slits. Do not set the discs in other slits.

6. Set whether the self-protection function during errors is equipped

with the unit. Press the REPEAT button. If “REPEAT” is dis-
played on the Fluorescent indicator tube, it means the function
is provided. If “REPEAT” is not displayed, it means the func-
tion is not provided.

7. Press the 

· button.

8. The 

· LED blinks, the aging mode is set, and aging is started.

9. The aging cycle lasts 3 minutes. If errors occur during aging, the

error number will be displayed on the Fluorescent indicator tube.
(Refer to the following table for the details of the errors.)

10.Aging will be repeated as long as no errors occur.
11.After each aging cycle, the number displayed on the Fluores-

cent indicator tube will increase.

12.To end aging, press the POWER button

1 2 0

E r r 0 1

  

  

Disc number

Error code

Err 01

Err 02

Err 03

Err 04

Err 05

Err 06

Err *1

Err *2

Err *3

Err *4

Err *5

Err *6

Err *7

Code number

Name

DISC sensor check 1

DISC sensor check 2

Table operation check 1

Table operation check 2

Loading operation check 1

Loading operation check 2

BU related check 1

BU related check 2

BU related check 3

BU related check 4

BU related check 5

BU related check 6

BU related check 7

Contents

No disc in the specified slit

Disc in other slits

Table motor current over

No table sensor input

Load in timeover

Load out timeover

Access timeover

High speed search NG

Q data read error

BU operation (from focus search to until signal can be read) timeover

GFS monitor error

Focus cannot be imposed by focus search

Auto focus bias adjustment cannot be performed

The * numbers mean the following according to the state of the unit during aging

2 : From chucking to end of TOC read
3 : From end of TOC read to end of last track playback
4 : From end of last track playback to end of first track playback

— 20 —

Perform the following steps before carrying out adjustments.
1. Turn ON the power of the unit, set disc to disc table No. 92, and

perform chucking.

2. Turn OFF the power.
3. Remove the case.
4. While pressing the STOP button, turn ON the POWER button.

The test mode is set.

5. The POWER button LED starts blinking.

(Test mode)

POWER button

STOP button

GROUP 1
button

GROUP 5
button

GROUP 1 button

GROUP 5 button

Cam

Pulley

LED

POWER

NOTE 1: The cam will start rotating when the GROUP 1 or

GROUP 5 button is pressed continuously in the test mode.

NOTE 2: If the power cannot be supplied, the cam can be rotated

by rotating the pulley with your finger.