SONY CDP-XB820 Service Manual

CDP-XB820

SERVICE MANUAL

SPECIFICATIONS

AEP Model

Model Name Using Similar Mechanism NEW CD Mechanism Type CDM36-14E Base Unit Type BU-14E Optical Pick-up Type KSS-213B/F-NP

MICROFILM

– Continued on next page –

COMPACT DISC PLAYER

TABLE OF CONTENTS

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

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

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

4. TEST MODE

4-1. AF ADJ Mode ................................................................. 9

4-2. ADJ Mode ....................................................................... 10

4-3. CLV-S Mode.................................................................... 10

4-4. AGING Mode.................................................................. 11

5. ELECTRICAL BLOCK CHECKING ................ 12

6. DIAGRAMS

6-1. IC Pin Function Description ........................................... 14

6-2. Note for Printed Wiring Boards and

Schematic Diagrams ....................................................... 16

6-3. Printed Wiring Board – BD Section – ............................ 19

6-4. Schematic Diagram – BD Section – ............................... 21

6-5. Printed Wiring Boards

– OPTICAL PICK-UP/MOTOR Section – .................... 23

6-6. Schematic Diagram

– OPTICAL PICK-UP/MOTOR Section – .................... 24

6-7. Printed Wiring Board – MAIN Section –....................... 25

6-8. Schematic Diagram – MAIN Section (1/2) –................. 27

6-9. Schematic Diagram – MAIN Section (2/2) –................. 29

6-10. Printed Wiring Boards – POWER Section – .................. 31

6-11. Schematic Diagram – POWER Section – ...................... 33

6-12. Printed Wiring Boards – PANEL Section – ................... 35

6-13. Schematic Diagram – PANEL Section –........................ 37

7. EXPLODED VIEWS ................................................ 42

8. ELECTRICAL PARTS LIST ............................... 46

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS 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.

– 2 –

SECTION 1

SERVICING NOTES

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.

Notes on chip component replacement

• Never reuse a disconnected chip component.

• Notice that the minus side of a tantalum capacitor may be damaged by heat.

CAUTION

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

HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF

Insert a tapering driver into the aperture of he unit bottom, and turn in the direction of arrow (to OUT direction).

DISC REMOVAL PROCEDURE (at POWER OFF)

1. Remove the case. (Refer to page 7.)

2. Push the slide cam in the direction of the arrow A.

3. Draw out the loading panel in the direction of the arrow B by hand, and remove a disk.

slide cam

”B

loading panel

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

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

The following caution label is located inside the unit.

– 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 to the disc table with the “test disc” label facing up, 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 0DB

4. Rotating [AMS] knob, select 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.

42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67

Recorded contents

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

01234567 (30h to 37Fh) 8 9 : ; < = > ? (38h to 3Fh)

@A B C D E F G (40h to 47Fh)

H I J K L MNO (48h to 4Fh) P QR S T U VW (50h to 57Fh) X Y Z [ ¥ ] ^ _ (58h to 5Fh)

a b c d e f g (60h to 67Fh)

′

h i j k l m n o (68h to 6Fh) p q r s t u v w (70h to 77Fh) xyz{ I }

(78h to 7Fh)

i¢£¤¥ § (A0h to A7h) 8859-1

≥ C ª

•±23

º ¿ (B8h to BFh)

†

–

µ ¶ • (B0h to B7h)

′

14123

(A8h to AFh)

АБВГДЕЖЗ (C0h to C7Fh) ИЙКЛМНОП (C8h to CFh) D СТУФХЦ ШЩЪЫЬY

(D0h to D7Fh)

Я (D8h to DFh) абвгдежз (E0h to E7Fh) ийклмноп (E8h to FFh) ∂ стуфхц÷ (F0h to F7Fh) шщъыьy

ÿ (F8h to FFFh)

No.66 No.67 to No.99

Display

– 5 –

• LOCATION OF CONTROLS

SECTION 2

GENERAL

1 432 5 6

!£ !¢ !∞!§ !¶ !• !ª @º @¡ @™ @£@¢ @∞

1 U (power) button 2 PLAY MODE button 3 REPEAT button 4 FADER button 5 TIME TEXT button 6 Remote sensor 7 0 button 8 ) button 9 EDIT/TIME FADER button 0 CHECK button !¡ CLEAR button !™ Fluorescent indicator tube !£ PHONES jack !¢ PHONE LEVEL knob !∞ FILTER knob !§ PEAK SEARCH button !¶ AUTO SPACE button !• MUSIC SCAN button !ª LANGUAGE button @º Disc tray @¡ § OPEN/CLOSE button @™ · button @£ P button @¢ p button @∞ ≠ AMS ±, PUSH ENTER knob

9 0 !¡!™

– 6 –

SECTION 3

)

DISASSEMBLY

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

CASE

2

two screws (case 3TP2)

2

two screws (case 3TP2)

3

case

1

two screws (BV/RING)

2

two screws (case 3TP2)

FRONT PANEL SECTION

2

two claws

3

loading panel ass’y

8

claw

1

Push the slide cam in the direction of the arrow

4

connector (CN903)

5

connector (CN351)

6

flat wire (25 core (CN302)

9

front panel section

– 7 –

8

claw

7

five screws (BV3

MECHANISM DECK (CDM36-14E)

2

screw (BVTP3

3

lug



1

4

two screws (BVTP3

flat wire (23 core) (CN301)

4

two screws

(BVTP3

5

mechanism dec (CDM36-14E)

MAIN BOARD

4

two screws (BVTP 3

2

connector (CN951)

1

flat wire (23 core) (CN301)

two screws

(BVTP 3

5

main board

3

four screws (BV/RING)

– 8 –

SECTION 4

TEST MODE

4-1. AF ADJ MODE

The following checks can be performed in the AF ADJ mode, which is set by connecting the TP2 (AF ADJ : JW96) terminal on MAIN board to the Ground and turning on the power.

• FL tube check

After all segments light up, when the · button is pressed, the following will be displayed. (Partial lighting 1)

(Partial lighting 1)

When the p button is pressed, the following will be displayed. (partial lighting 2)

6810

12 14

16 18 20

When the OPEN/CLOSE § button is pressed, all will light up again.

When the ≠ AMS ± knob is rotated, the following will be displayed. (partial lighting 3)

(Partial lighting 2)

Buttons and Corresponding Button Numbers

Button Button Number or Display

LANGUAGE 0 MUSIC SCAN 1 AUT O S PAC E 2 PEAK SEARCH 3 PLAY MODE 4 REPEAT 5 FADER 6 TIME/TEXT 7

0 8 ) 9

EDIT/TIME FADE 10 CHECK 11 CLEAR 12

P 18 PUSH ENTER 20 OPEN/CLOSE § All lit PLAY · Partial lighting 1 STOP p Partial lighting 2 ≠ AMS ± Partial lighting 3

“FILTER-STD/1/2/3” is displayed on the FL tube when the FILTER switch is pressed.

Rightward:

Lefrward:

(Partial lighting 3)

• Key check

All buttons have corresponding b utton numbers. When a button is pressed, the counter will count up and display the button’s number. Ho wever , the counter will only count to “18”. It will not count for buttons already pressed once, but will display the button’ s number.

Display of counting

Display of button number

• Remote commander check

“REMOCON PLA Y” is displayed on the FL tube when the PLAY button on the remote commander is pressed. All go off when the other buttons a pressed.

• Audio check

• Initial setting of digital filter and release of mute.

• When the TP2 (AF ADJ) terminal on MAIN board is set to HIGH

(VDD), emphasis turns on. When set to LOW (GND), it turns off.

– 9 –

4-2. ADJ MODE

The following operations are performed in the ADJ mode, which is set by connecting the TP1 (ADJ : JW98) terminal to the Ground and turning on the power.

• During playback, there is no problem even if the GFS is continuously LOW.

• High speed search is prohibited during access.

• During playback, the gain of focus servo and spindle servo does not decrease.

• Servo related manual operations and measurement can be performed. (For details of operations, refer to Table of Key Operrations in ADJ Mode.)

[ MAIN BOARD ] – Conductor Side –

JW096

IC930

TP2 (AFADJ)

JW098

TP1 (ADJ)

IC302

4-3. CLV-S MODE

The spindle servo for playback sets into the CLV-S mode when the TP2 (AF ADJ) terminal is connected to Ground after turning on the power.

T ABLE OF BUTTON OPERATIONS IN ADJ MODE

The jitter value display mode can be set after the all-music remaining number mode using the [TIME/TEXT] button.

The functions of the number buttons are shown in the following table.

FUNCTIONS OF NUMBER BUTTONS (With the attached remote commander)

Button Function

1 Focus bias up 2 Focus bias aliasing (upper, middle, lower) display 3 Focus bias (best point, jitter value) display 4 Tracking servo, sled servo off 5 Tracking gain up 6 Focus bias down 7 Focus bias readjustment 8 Focus bias 00 point

9 Tracking servo, sled servo on 10 Tracking gain normal 11 S-Curve mode (play mode only) 12 Eccentric mode 13 14 15 16 17 Tracking gain initialize 18 Offset display (TE), EF, Bias 19 Offset display (VC, FE, RF) 20 Auto gain (FCS, TRK)

CLR key (Error Rate, RFCK, GFS) selection

Reserved for BD

CN302

– 10 –

4-4. AGING MODE

1. How to Enter AGING Mode

Aging method 1 (When using the aging mode remote controller (J-2501-123-A)):

1) Pess the U button and turn ON the power.

2) Set the disc on the tray.

3) Press the [AGINGSTART] button of the aging remote control- ler.

4) Aging starts and the message shown in Fig. 1 is displayed on the fluorescent display tube.

5) To end, press the U button.

Aging method 2 (When no aging mode remote controller):

1) Turn on the power of the set, and insert any disc.

2) Press three buttons of [MUSICSCAN], [ªOPEN/CLOSEº],

and p simultaneously, and the set goes in the AGING mode.

3) Performing the aging for a while, confirm that “ERROR” is not

displayed on the fluorescent display tube.

2. How to Exit from AGING Mode Turn off the Power, and normal operation becomes ready.

3. Operation sequence in AGING Mode.

Contents of AGING mode

Display Operation 1 AGING-0 loading IN 2 AGING-1 Toc read 3 AGING-2 last access 4 AGING-3 last play 5 AGING-4 first access 6 AGING-5 first play 7 AGING-6 loading OUT

Fig. 1

*: In case of a failure

A faulty operation mode No. such as “ERROR-3’’ is blinking.

*: During aging, the keys on the set and the remote control A1 are

not accepted.

*: To quit the aging, turn of the power of the set.

– 11 –

SECTION 5

)

ELECTRICAL BLOCK CHECKING

Note:

1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

S Curve Check

Connection:

oscilloscope

BD board TP2 (FE)

TP (VC)

+ –

Procedure :

1. Connect oscilloscope to test point TP2 (FE) on BD board.

2. Connect between test point TP3 (FEI) and TP (VC) by lead wire.

3. Turn ON the power.

4. Put disc (YEDS-18) in and turned Power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out.)

5. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3±1 Vp-p.

S-curve waveform

symmetry

within 3

1 Vp-p

6. After check, remove the lead wire connected in step 2.

Note : • Try to measure several times to make sure than the ratio of A : B

or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the brightness to obtain best waveform.

Note: A clear RF signal waveform means that the shape “≈” can be clearly

distinguished at the center of the waveform.

RF signal waveform

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

level: 1.2

0.2 Vp-p

E-F Balance (1 Track Jump) Check (Without remote commander)

Connection:

oscilloscope

(DC range)

BD board TP4 (TE)

TP (VC)

+ –

Procedure :

1. Connect oscilloscpe to test point TP4 (TE) on BD board.

2. Turn ON the power.

3. Put disc (YEDS-18) in to play the number five track.

4. Press the “P (Pause)” button. (Becomes the 1 track jump mode)

5. Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following : A/B x 100 = less than ± 22%

1 track jump waveform

Center of the waveform

0 V

A (DC voltage

RF Level Check

Connection:

oscilloscope

BD board

TP1 (RF)

TP (VC)

+ –

Procedure :

1. Connect oscilloscope to test point TP1 (RF) on BD board.

2. Turn ON the power.

3. Put disc (YEDS-18) in to play the number five track.

4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.

level: 1.3 ± 0.6 Vp-p

symmetry

E-F Balance Check (With remote commander)

Connection:

oscilloscope

(DC range)

BD board TP4 (TE)

TP (VC)

+ –

Procedure :

1. Connect the test point TP1 (ADJ : JW98) on MAIN board to the ground with a lead wire on MAIN board.

2. Connect oscilloscpe to test point TP4 (TE) on BD board.

3. Turn ON the power to set the ADJ mode.

4. Put disc (YEDS-18) in to play the number five track.

5. Press the “4” button. (The tracking servo and the sledding servo are turned OFF.)

– 12 –

6. Check the lev el B of the oscilliscope's wa v eform and the A (DC

)

voltage) of the center of the Traverse waveform. Confirm the following : A/B x 100 = less than ± 22%

Traverse waveform

Center of the waveform

RF PLL Free-run Frequency Check

Procedure :

1. Connect frequency counter to test point (MNT1) with lead wire.

frequency counte

BD board



TP9 (MNT1)

+ –

0 V

A (DC voltage)

level: 1.3

0.6 Vp-p

7. Press the “9” button. (The tracking serv o and sledding servo are turned ON.) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 6.

Traverse waveform

0 V

Tracking servo Sledding servo

OFF

Tracking servo Sledding servo

8. Disconnect the lead wire of TP1 (ADJ : JW98) connected in step 1.

C (DC voltage

2. Turn ON the power.

3. Put the disc (YEDS-18) in to play the number five track. Confirm that reading on frequency counter is 4.3218MHz.

Adjustment Location :

[ BD BOARD ] — Side A —

IC103

TP4 (TE)

TP2 (FE)

TP1 (RF)

(VC)

TP3 (FEI)

IC102

[ MAIN BOARD ] – Conductor Side –

JW096

IC930

TP2 (AFADJ)

JW098

TP1 (ADJ)

IC302

CN302

IC101

TP9 (MNT1)

– 13 –

+ 29 hidden pages

SONY CDP-XB820 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SERVICING NOTES

GENERAL

DISASSEMBLY

TEST MODE

ELECTRICAL BLOCK CHECKING