Sony CDP-CX20 Schematic

CDP-CX220

SERVICE MANUAL

SPECIFICATIONS

US Model

Canadian Model

AEP Model

UK Model

E Model

Australian Model

Model Name Using Similar Mechanism CDP-CX250 CD Mechanism Type CDM-40B Base Unit Type KSM-213BKN/M-N Optical Pick-up Type KSS-213B/S-N

Compact disc player

Laser Semiconductor laser (λ = 780 nm)

Emission duration: continuous

Laser output Max 44.6 µW*

* This output is the value measured at

a distance of 200 mm from the objective lens surface on the Optical Pick-up block with 7 mm aperture.

Frequency response 20 Hz to 20 kHz ± 0.5 dB

Signal-to-noise ratio More than 105 dB

Dynamic range More than 98 dB

Harmonic distortion Less than 0.0045%

Channel separation More than 97 dB

Outputs

Jack Maximum Load impedance type output

level

LINE OUT Phono 2V Over 10 kilohms

Jacks (at 50 kilohms)

DIGITAL Optical –18 dBm Wave length: 660 nm OUT output (OPTICAL) connector

General

Power requirements

Where purchased Power requirements

USA/Canada 120 V AC, 60 Hz Australia 240 V AC, 50/60 Hz Europe 220 V – 230 V AC, 50/60 Hz Other countries 110 V – 120 V or 220 V – 240 V AC,

adjustable, 50/60 Hz

Power consumption 12 W Dimensions (approx.) When the front cover is closed (w/h/d) 430 × 200 × 480 mm (17 × 7 7/8 × 19 in.)

incl. projecting parts

Mass (approx.) 9.5 kg (21 lbs)

Supplied accessories

Audio cord (2 phono plugs – 2 phono plugs) (1) Remote commander (remote) (1) Sony SUM-3 (NS) batteries (2) CD booklet holders (2) and label (1)

Design and specifications are subject to change without notice.

COMPACT DISC PLAYER

MICROFILM

TABLE OF CONTENTS

1. SERVICING NOTES............................................... 3

2. GENERAL ................................................................... 6

CAUTION

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

3. DISASSEMBLY ......................................................... 7

4. TEST MODE.............................................................. 10

5. MECHANICAL ADJUSTMENTS ....................... 13

6. ELECTRICAL ADJUSTMENTS......................... 19

7. DIAGRAMS................................................................. 22

7-1. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 23

7-2. Printed Wiring Board – BD Section – ........................... 25

7-3. Schematic Diagram – BD Section – ............................... 27

7-4. Printed Wiring Board – Main Section – ........................ 29

7-5. Schematic Diagram – Main Section – ........................... 31

7-6. Printed Wiring Boards – Jack Section –........................ 33

7-7. Schematic Diagram – Jack Section – ............................ 35

7-8. Printed Wiring Boards – Panel Section – ...................... 37

7-9. Schematic Diagram – Panel Section – .......................... 39

7-10. Printed Wiring Board – Sensor/Motor Section – .......... 41

7-11. Schematic Diagram – Sensor/Motor Section – ............. 43

7-12. IC Pin Function Description ........................................... 47

8. EXPLODED VIEWS................................................ 49

9. ELECTRICAL PARTS LIST ............................... 56

The laser component in this product is capable of emitting radiation exceeding the limit for Class 1.

This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.

(Except for the customers in the United States and Canada)

The following caution label is located inside the unit.

CAUTION :

INTERLOCKS DEFEATED. AVOID EXPOSURE TO BEAM.

ADVARSEL :

SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE FOR STRÅLING.

VORSICHT :

ABDECKUNG GEÖFFNET UND SICHEREITSVERRIEGELUNG ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.

VARO!:

TIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.

VARNING :

OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.

ADVERSEL :

SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.

VIGYAZAT!:

GÁRVESZÉLY

INVISIBLE LASER RADIATION WHEN OPEN AND

USYNLIG LASERSTRÅLING VED ÅBNING NÅR

UNSICHTBARE LASERSTRAHLUNG, WENN

AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT -

OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR ÖPPNAD

USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG

A BURKOLAT NYITÁSAKOR LÁTHATATLAN LÉZERSU-

KERÜLJE A BESUGÁRZÁST!

MODEL IDENTIFICATION — BACK PANEL —

PART No. MODEL

4-998-525-0 4-998-525-1 4-998-525-2 4-998-525-4 4-998-525-5 4-998-525-6

US model Canadian model AEP, AED UK model Singapore model E model Australian model

• Abbreviation AED: North European

PART No.

– 2 –

SECTION 1

SERVICING NOTES

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

LEAKAGE

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers.). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester , such as the Simpson 229 or RCA WT -540A. Follo w the manufacturers’ instructions to use these instruments.

2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V A C range are suitable. (See Fig. A)

To Exposed Metal Parts on Set

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in ”CD section adjustment” and check that the S curve waveform is output repeatedly.

1.5 k

0.15 µF

Fig. A. Using an AC voltmeter to check AC leakage.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIA GRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

Ω

Earth Ground

AC voltmeter (0.75 V)

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

– 3 –

CD-TEXT TEST DISC

This unit is able to display the test data (character information) written in the CD on its fluorescent indicator tube. The CD-TEXT TEST DISC (TGCS-313:4-989-366-01) is used for checking the display. To check, perform the following procedure.

Checking Method:

1. Turn ON the power, set the disc on the disc table with the side labeled as “test disc” as the right side, close the front cover , and chuck the disc.

2. Press the · button and play back the disc.

3. The following will be displayed on the fluorescent indicator tube.

Display : 1kHz/0 dB/ L&R

4. Press the ≠ and ± buttons to switch the track. The text data of each track will be displayed. For details of the displayed contents for each track, refer to “Table 1 : CD-TEXT TEST DISC TEXT Data Contents” and “Table 2 : CDTEXT TEST DISC Recorded Contents and Display”.

Restrictions in CD-TEXT Display

In this unit, some special characters will not be displayed properly. These will be displayed as a space or a character resembling it. For details, refer to “Table 2 : CD-TEXT DISC Recorded Contents and Display”.

Table 1 : CD-TEXT TEST DISC TEXT Data Contents (TRACKS No. 1 to 41:Normal Characters)

TRACK

No.

1 1kHz/0dB/L&R 22 1kHz/-90dB/L&R 2 20Hz/0dB/L&R 23 Infinity Zero w/o emphasis//L&R 3 40Hz/0dB/L&R 24 Infinity Zero with emphasis//L&R 4 100Hz/0dB/L&R 25 400Hz+7kHz(4:1)/0dB/L&R 5 200Hz/0dB/L&R 26 400Hz+7kHz(4:1)/-10dB/L&R 6 500Hz/0dB/L&R 27 19kHz+20kHz(1:1)/0dB/L&R 7 1kHz/0dB/L&R 28 19kHz+20kHz(1:1)/-10dB/L&R 8 5kHz/0dB/L&R 29 100Hz/0dB/L*

9 7kHz/0dB/L&R 30 1kHz/0dB/L* 10 10kHz/0dB/L&R 31 10kHz/0dB/L* 11 16kHz/0dB/L&R 32 20kHz/0dB/L* 12 18kHz/0dB/L&R 33 100Hz/0dB/R* 13 20kHz/0dB/L&R 34 1kHz/0dB/R* 14 1kHz/0dB/L&R 35 10kHz/0dB/R* 15 1kHz/-1dB/L&R 36 20kHz/0dB/R* 16 1kHz/-3dB/L&R 37 100Hz Squer Wave//L&R 17 1kHz/-6dB/L&R 38 1kHz Squer Wave//L&R 18 1kHz/-10dB/L&R 39 1kHz w/emphasis/-0.37dB/L&R 19 1kHz/-20dB/L&R 40 5kHz w/emphasis/-4.53dB/L&R 20 1kHz/-60dB/L&R 41 16kHz w/emphasis/-9.04dB/L&R 21 1kHz/-80dB/L&R

Displayed Contents

TRACK

No.

Displayed Contents

NOTE: The contents of Track No. 1 to 41 are the same as those of the current TEST DISC-their titles are displayed.

– 4 –

Table 2: CD-TEXT TEST DISC Recorded Contents and Display

(In this unit, some special characters cannot be displayed. This is no a fault.)

TRACK

No.

Recorded Contents Display

42 ! ” # $% & ´ (21h to 27h)1kHz 0dB L&R N All the same 43 ( ) + , – . / (28h to 2Fh) N All the same

44 01234567 (30h to 37Fh) N All the same 45 8 9 : ; < = > ? (38h to 3Fh) N All the same 46 @A B C D E F G (40h to 47Fh) N All the same 47 H I J K L MN O (48h to 4Fh) N All the same 48 P QR S T U VW (50h to 57Fh) PQR S T U VW (50h to 57h) 49 X Y Z [ ¥ ] ^ _ (58h to 5Fh) XY Z [ \ ] ^ _ (58···· 50 a b c d e f g (60h to 67Fh) a b c d e f g (60h to 67h)

′

51 h i j k l m n o (68h to 6Fh) N All the same 52 p q r s t u v w (70h to 77Fh) p q r s t u v w (70h to 77h) 53 x y z { I } (78h to 7Fh) x y z { } ~ (78····

54 i¢£¤¥ § (A0h to A7h) 8859-1 i ¢ £ ¤ ¥ § (A0···· is not displayed 55 ≥ C ª¬PR (A8h to AFh) ≥ (A8···· C ª ¬ P R – are not displayed 56

•±23

57 †1º ¿ (B8h to BFh) † ¿ (B8····

–

µ¶ • (B0h to B7h) µ • (B0····

′

14123

′

• ± 2 3

¶ are not displayed

14123

º are not displayed

58 АБВГДЕЖЗ (C0h to C7Fh) ÀÁ Â Ã Ä ÅÆÇ (C0h to C7h) 59 ÈÉÊË ÌÍÎÏ (C8h to CFh) N All the same 60 DСТУФХЦ (D0h to D7Fh) D СТУФХЦ (D0h to D7h)

61 ШЩЪЫЬY Я (D8h to DFh) Ù Ú Û Ü Y ß (D8····

62 абвгдежз (E0h to E7h) а бвгдежз (E0h to E7h) 63 ийклмноп (E8h to EFh) N All the same 64 ∂ стуфхц÷ (F0h to F7Fh) стуфхц÷ (F0h to F7h) 65 шщъыьy ÿ (F8h to FFFh) шщъыьy ÿ (F8h to FFh)

66 No.66 N All the same 67 No.67 N All the same

to to to

99 No.99 N All the same

– 5 –

LOCATION OF PARTS AND CONTROLS

Front Panel

SECTION 2

GENERAL

2 345

STANDBY

1/u

CONTINUE

SHUFFLE

PROGRAM

REPEAT

TIME/TEXT

GROUP 1

GROUP 2

GROUP 3

GROUP 4

GROUP 5

GROUP 6

GROUP 7

GROUP 8

GROUP FILE

!•!ª@º

OPEN/CLOSE

!º

INPUT

MEMO SEARCH

AMS

DISC/CHARACTER

PUSH ENTER

CHECK

Pp§

!¡

!™

!£

CLEAR

!¢

!∞!§!¶

1 I/u (power switch) button 2 CONTINUE button 3 SHUFFLE button 4 Display window 5 PROGRAM button 6 REPEAT button 7 TIME/TEXT button 8 Front cover 9 MEMO SEARCH button !º INPUT button

!¡ ≠/± buttons !™ JOG dial (DISC/CHARACTER/PUSH ENTER knob) !£ CHECK button !¢ CLEAR button !∞ p button !§ P button !¶ · button !• § (OPEN/CLOSE) button !ª GROUP FILE button @º GROUP 1 – 8 buttons

– 6 –

SECTION 3

)

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.

CASE

four screws (case 3 TP2)

Open the case.

Remove the case to direction of arrow

five screws (case 3 TP2

FRONT PANEL SECTION

four screws (BVTP3

claw

front panel section

Remove the door (CD) ass’y to direction of arrow

flat wire (CN501)

claw

– 7 –

five screws (BVTT3 × 6)

GUIDE ASS’Y

)

screw (PSW3

boss

three screws (BVTT3

guide ass’y

three screws (BVTT3

connector (CN503)

REAR PANEL SECTION

connector (CN904)

flat wire (CN502)

connector (CN505)

four screws (BVTT3

PC board holder

three connectors (CN504, 506, 507)

rear panel section

four screws (PTTWH3

bracket

five screws (BVTT3

– 8 –

MECHANISM DECK

three screws (BVTT3

mechanism deck

BASE UNIT

six screws (BVTT3

screw (BVTT3 × 8)

fulcrum plate

(BU upper) ass’y

base uni

– 9 –

SECTION 4

TEST MODE

DISPLAY CHECK MODE

With the power turned off (standby state), press the I/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 scanned one by one.

Note: To exit this mode, press the p (stop) button.

ADJ MODE

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. T o set ADJ mode, connect the test point (TP: 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 (TP: ADJ) is connected to Ground after turning on the power.

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

during 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)

ADJ Mode Special Functions Table (The buttons shown with ( ) function by using the supplied remote commander only)

Button Button Number or Display

CONTINUE Servo average display

Displays VC, FE, RF, TE and traverse in hexadecimal numbers

SHUFFLE 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

PROGRAM Auto gain display

Displays focus, tracking, sledding in hexadecimal

numbers GROUP 1 (1) Increases the focus bias in 8 steps. GROUP 2 (2) Sets the focus bias in the middle of aliasing. GROUP 3 (3) Turns off the tracking and sledding servo GROUP 4 (4) Returns the auto gain to the initial value (30) GROUP 5 (5) Turns off the focus servo GROUP 6 (6) Decreases the focus bias in 8 steps. GROUP 7 (7) Re-adjusts the focus bias GROUP 8 (8) Turns on the tracking and sledding servo

(9) Switches the focus servo gain between normal and down

FG. norm: normal, FG. down: down

(10/0) Sets the focus bias to 0 (no bias)

Next, displays the jitter measured at the focus bias set

CHECK S-curve observation mode CLEAR Automatic eccentric measurement

The results of measurement is displayed in mm directly.

KEY AND FLUORESCENT DISPLAY TUBE CHECK MODE

1. Connect the test point (TP:AFADJ) of the MAIN board to the Ground, 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 connection in step 1 is made.

* Key Check Mode

This mode is set when a button is pressed after the whole fluorescent 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 26, but the number of buttons pressed will always be displayed.

** **

Counter display

Buttons and Corresponding Button Numbers

Button Button Number or Display

CLEAR 3 CHECK 4

± (AMS) 5 ≠ (AMS) 6

PUSH ENTER 7

(OPEN/CLOSE)

INPUT 10

MEMO SEARCH 11

I/u 18

TIME/TEXT 19

GROUP FILE 20

GROUP 8 21 GROUP 7 22 GROUP 6 23 GROUP 5 24

REPEAT 27

PROGRAM 28

SHUFFLE 29

CONTINUE 30

GROUP 4 31 GROUP 3 32 GROUP 2 33 GROUP 1 34

· All lit (LED lit) P Partial lighting 1 (LED lit) p Partial lighting 2

DISC/ Partial lighting 3

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

GROUP LEDs light up in the order of 1 → 2..8 → 2nd → 1.

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

GROUP LEDs light up in the order of 8 → 7..1 → 2nd → 8.

Button number display

– 10 –

Partial lighting 1

A B C D E F G

Partial lighting 2

Partial lighting 3

2nd

: Counter displayed

Test Points Location:

[MAIN BOARD] – Component Side –

(ADJ)

IC502

IC501

(AFADJ)

IC506

AGING MODE

• Mode which repeatedly changes and plays back discs automatically 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.

Sequence of Aging Mode

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

Order of Disc Change

(1 cycle takes 3 minutes)

1. No. 40

2. No. 120

3. No. 80

4. No. 200

5. No. 160

CN509 CN508

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 reproducibility. 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

DISC

CD1

number of agings

*DISC-40*

– 11 –

Aging Method

1. Change the [COMMANDMODE] switch (S901) 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. Rota te 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 “RE- PEA T” is displayed on the Fluorescent indicator tube, it means the function is provided. If “REPEAT” is not display ed, it means the function is not provided.

7. Press the · button.

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

9. T he a ging 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 Fluorescent indicator tube will increase.

12. To end aging, press the I/u button

Error Display

120 Err01



Disc number Error code

Error code

Code number Name Contents

Err 01 DISC sensor check 1 No disc in the specified slit Err 02 DISC sensor check 2 Disc in other slits Err 03 Table operation check 1 Table motor current over Err 04 Table operation check 2 No table sensor input Err 05 Loading operation check 1 Load in timeover Err 06 Loading operation check 2 Load out timeover Err *1 BU related check 1 Access timeover Err *2 BU related check 2 High speed search NG Err *3 BU related check 3 Q data read error Err *4 BU related check 4 BU operation (from focus search to until signal can be read) timeover Err *5 BU related check 5 GFS monitor error Err *6 BU related check 6 Focus cannot be imposed by focus search Err *7 BU related check 7 Auto focus bias adjustment cannot be performed

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

2 : From checking 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



– 12 –

SECTION 5

MECHANICAL ADJUSTMENTS

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 I/u button. The test mode is set.

5. The I/u button LED (STANDBY) starts blinking. (Test mode)

LED (STANDBY)

Note 1: The cam will start rotating when the [GROUP1] or [GROUP5]

button is pressed continuously in the test mode.

GROUP 1 button

GROUP 5 button

Note 2: If the power cannot be supplied, the cam can be rotated by rotat-

ing the pulley with your finger.

1/u

button

GROUP 1 button

STOP button

GROUP 5 butto

cam

pulle

– 13 –

GUIDE (DISC T) ALIGNMENT

cam

(1) Rotate the cam and adjust to the posi-

tion shown in the figure.

guide (disc T)

(2) Check that the state is as shown in

the figure.

guide (disc T)

cam

holder (guide T)

fixed scre

guide (disc T)

disc

(3) Loosen the fixed screw by about 60 °.

disc

holder (guide T)

tapering screwdriver

holder (guide T)

(4) Move the holder (guide T) with a tapering screwdriver,

and set the position of the guide (disc T) to A:B=1:1.

– 14 –

cam

holder (disc A2)

thrust screw

disc

0 – 1 mm

holder (disc A2)

disc

holder (disc A2)

thrust screw

HOLDER (DISC A2) ALIGNMENT

(1) Rotate the cam and adjust to the position

shown in the figure.

(2) Check that the state is as shown in

the figure.

(3) After applying suitable locking compound to the part, rotate the thrust screw until the holder (Disc A2) comes to the center of

the disc.

– 15 –

SENSOR ALIGNMENT

Perform this adjustment after the “holder (disc A2) adjustment”. If the disc table swings to the left and right just before the disc is chucked, perform the following adjustment.

cam

lever (stopper) ass’y

(1) Rotate the cam and adjust to the position

shown in the figure.

(2) Check that the lever (stopper) ass’y secures

the disc table as shown in the figure.

lever (stopper) ass’y

tapering screwdriver

bracket (sensor)

table ass’y

disc table

swing

(4) Moving the disc table right and left with a hand after the

screw is fixed, the table will mov e by the play of a disc table. If the LEDs light up alternately, the adjustment will be performed correctly.

LUMINOUS board

PLAY button

bracket (sensor)

fixed screw

PAUSE button

(3) Loosen the fixed screw by 60° to 90°, and use a tapering screwdriver to adjust the screw as shown in the figure.

Move the bracket (sensor) with the tapering scre wdriv er little by little, and fix the fix ed scre w at where the play button's LED (green) is switched to the pause button's LED (orange) (or its reverse).

– 16 –

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