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— 17 —

1 Screw (BVTT 3x6)

1 Flat type wire

4 Nine screws (BVTT 3x8)

5 Mechanism deck

2 Connector

3 Connector (CN504)

2 Fulcrum plate

3 Base unit

— 18 —

Button

CONTINUE

SHUFFLE

PROGRAM

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

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 lights up simultaneously.

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

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

chucking.

2. Disconnect the power supply plug from the outlet.
3. To set ADJ mode, connect the test point (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 (ADJ) is connected to Ground after turning 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)

To set this mode, connect the test point (AFADJ) on the MAIN board
to Ground, and connect the power supply plug to the outlet.

• All FL segments and grids will light up. (All lit check)

When a button is pressed, the types of buttons pressed until then
will be displayed on the left side and the number of the buttons will
be displayed on the right side. However, these will not be displayed
for the following special buttons.

p(stop) button:

FL segment check
(Refer to FL Tube Check Patterns)

P(pause) button: FL grid check (Refer to FL Tube Check Patterns)

The pause LED also lights up simultaneously.

·(play) button: All FL segment and grid will light up.

The play LED also lights up simultaneously.

Grid check

A

B

C

D

E

Segment 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.

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

• Abbreviation
  FL: Fluorescent Indicator Tube

— Component Side —

Function

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

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.

— 19 —

Aging Mode
• 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. How-
ever, 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.

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$

$

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. 180

$

$

$

Special Aging Mode Functions
The aging mode is provided with the following convenient functions
• Disc setting mode (*1)
• Selection of presence of protection function during error (*2)
• Count function of aging cycle (*3)

*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 nor-
mal operations by retries.
If this function is not provided, all operations will be stopped with-
out retiring. It is suitable for checking errors with low reproduc-
ibility.
If this function is provided, and errors can be corrected by retries,
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 consists
of five discs.

1DISC

CD1

DISC

2

*

DISC-40

*

— 20 —

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

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

3. When the disc set mode is set, the 

( and P LEDs blink.

4. 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.

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

with the unit. Press the REPEAT button. If “REPEAT” is displayed
on the Fluorescent indicator tube, it means the function is pro-
vided. If “REPEAT” is not displayed, it means the function is not
provided.

6. Press the 

( button.

7. The 

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

8. 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.)

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

indicator tube will increase.

11.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

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

Contents

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

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