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– 9 –

 Follow the disassembly procedure in the numerical order given.

1

 

Two screws

    (BVTP3x8)

2

 

Two screws

    (BVTP 3x8)

3

 

Four screws

    (BVTT3x6)

5

 

Remove the claw

6

 

Remove the claw

7

 

Front panel assembly

4

 

Flat type wire (17 core)

    (Main board, CN501)

5

 

Remove the PC board holder

7

 

Back panel

1

 

Connector (CN906)

2

 

Two screws

    (BVTT3X6)

3

 

Seven screws

    (BVTT3X6)

4

 

Three screws

    (BV3X6)

– 10 –

2

 

Three screws (BVTT3x6)

3

 

Screw (PSW3x6)

4

 

Connector (CN503)

5

 

Guide assembly

MAIN board

7

 

Three screws (BVTT3x6)

8

 

Three screws 

    (BVTT3x6)

6

 

Door (CD) assembly

9

 

Base (Door, Gear) assembly

1

 

Screw (BVTT3x6)

1

 

Stop ring (E type)

4

 

Table assembly

5

 

Washer

2

 

Two screws

    (BVTT3x6)

3

 

Two holder assemblies

– 11 –

5

 

Mechanism deck

Jack board

Main board

Main board

1

 

Flat type wire

    (23core) (CN502)

4

 

Nine screws

    (BVTT3x8)

2

 

Connector

    (CN904)

3

 

Connector

    (CN505)

1

 

Screw (BVTT3x6)

2

 

Fulcrum plate (BU Upper) assembly

3

 

Base unit

– 12 –

With the power turned off (standby state), press the  1/u  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  p  (stop) 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 (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.

Segment check

• When the jog dial is rotated to the right, the GROUP LEDs light

up in the order of 1n2..8n1.

• When the jog dial is rotated to the left, the GROUP LEDs light up

in the order of 8n7..1n8.

• Abbreviation
  FL: Fluorescent Indicator Tube

[ MAIN BOARD ] – Component Side –

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

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.
(Exits this mode when the  p  button is pressed.)
Automatic eccentric measurement
The results of measurement is displayed in 

µ

m directly.

Grid check

Magnified

A

B

C

D

E

1

6

RV501

DISC SENSOR 

ADJUSTMENT

CN506

TP2

(AFADJ)

TP1

(ADJ)

R540

IC501

R531