SONY CDPXB740 - Service Manual Immediate Download

CDP-XB740/XB740E

AEP Model

CDP-XB740

UK Model

CDP-XB740E

SPECIFICATIONS

SERVICE MANUAL

COMPACT DISC PLAYER

Model Name Using Similar Mechanism

CDP-XB720/XB720E

CD Mechanism Type

CDM14FLS-5BD25

Base Unit Type

BU-5BD25

Optical Pick-up Type

KSS-213BA/F-NP

Photo: CDP-XB740

Ver 1.1 2001.02

Sony Corporation

Audio Entertainment Group

General Engineering Dept.

9-929-241-12

2001B0900-1

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE

WITH MARK 0 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.

CAUTION

Use of controls or adjustments or performance of procedures

other than those specified herein may result in hazardous ra-

diation exposure.

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.

Flexible Circuit Board Repairing

· Keep the temperature of soldering iron around 270°C

during repairing.

· Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times).

· Be careful not to apply force on the conductor when soldering

or unsoldering.

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 PROD-

UCT MARKING is located on

the rear exterior.

PARTS No.

MODEL

MODEL IDENTIFICATION

-- BACK PANEL --

TABLE OF CONTENTS

1. SERVICING NOTE .......................................................... 3

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

3. DISASSEMBLY

3-1. Front Panel ........................................................................... 7

3-2. Base Unit (BU-5BD25) ......................................................... 7

4. TEST MODE ....................................................................... 8

5. ELECTRICAL BLOCK CHECKING ........................ 10

6. DIAGRAMS

6-1. Circuit Boards Location ...................................................... 12

6-2. Printed Wiring Board BD Section ................................. 14

6-3. Schematic Diagram BD Section ................................... 15

6-4. Printed Wiring Board Main Section .............................. 16

6-5. Schematic Diagram Main Section ................................ 17

6-6. Printed Wiring Board Display Section .......................... 18

6-7. Schematic Diagram Display Section ............................ 19

6-8. Schematic Diagram Power/HP Section ........................ 20

6-9. Printed Wiring Board Power/HP Section ...................... 20

6-10. Schematic Diagram Loading Motor Section ............... 21

6-11. Printed Wiring Board Loading Motor Section ............ 21

6-12. IC Pin Functions ................................................................ 22

6-13. IC Block Diagrams ............................................................ 26

7. EXPLODED VIEWS

7-1. Case Section ........................................................................ 29

7-2. Front Panel Section ............................................................. 30

7-3. Mechanism Deck Section (CDM14FLS-5BD25) ............... 31

7-4. Base Unit Section (BU-5BD25) .......................................... 32

8. ELECTRICAL PARTS LIST ........................................ 33

4-997-214-6s

4-997-214-7s

XB740

XB740E

Parts No.

SECTION 1

SERVICING NOTE

HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH

TURNS OFF

Insert a tapering driver into the aperture of the unit bottom, and turn

in the direction of arrow.

* To close the disc table, turn the driver in the reverse direction.

Pull out disc table.

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK

OR BASE UNIT

The laser diode in the optical pick-up block may suffer

electrostatic breakdown because of the potential difference

generated by the charged electrostatic load, etc. on clothing and

the human body.

During repair, pay attention to electrostatic breakdown 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 continuously.

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.

Displayed Contents

TRACK

No.

Displayed Contents

1kHz/0dB/L&R

20Hz/0dB/L&R

40Hz/0dB/L&R

100Hz/0dB/L&R

200Hz/0dB/L&R

500Hz/0dB/L&R

1kHz/0dB/L&R

5kHz/0dB/L&R

7kHz/0dB/L&R

10kHz/0dB/L&R

16kHz/0dB/L&R

18kHz/0dB/L&R

20kHz/0dB/L&R

1kHz/0dB/L&R

1kHz/-1dB/L&R

1kHz/-3dB/L&R

1kHz/-6dB/L&R

1kHz/-10dB/L&R

1kHz/-20dB/L&R

1kHz/-60dB/L&R

1kHz/-80dB/L&R

1kHz/-90dB/L&R

Infinity Zero w/o emphasis//L&R

Infinity Zero with emphasis//L&R

400Hz+7kHz(4:1)/0dB/L&R

400Hz+7kHz(4:1)/-10dB/L&R

19kHz+20kHz(1:1)/0dB/L&R

19kHz+20kHz(1:1)/-10dB/L&R

100Hz/0dB/L*

1kHz/0dB/L*

10kHz/0dB/L*

20kHz/0dB/L*

100Hz/0dB/R*

1kHz/0dB/R*

10kHz/0dB/R*

20kHz/0dB/R*

100Hz Squer Wave//L&R

1kHz Squer Wave//L&R

1kHz w/emphasis/-0.37dB/L&R

5kHz w/emphasis/-4.53dB/L&R

16kHz w/emphasis/-9.04dB/L&R

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

However, only 8 digits are displayed, and the 9th digit onwards are displayed as " ".

CD-TEXT TEST DISC

This unit is able to display the TEXT data (character information)

written in the CD on its fluorescent indicator tube.

The CD-TEXT TEST DISC (TGCS-313: J-2501-126-A) is used

for checking the display.

To check, perform the following procedure.

Procedure:

1. Turn ON the power and set the test disc.

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

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

Display : CD TEXT

4. Rotate the l AMS L knob to switch the track. The text

data of each track will be displayed.

TRACK

No.

Recorded contents

Display

···· ! " # $ % & are not displayed

( )

/ ···· , . are not displayed

012 34567 ····

8 9

? ···· : ; < > are not displayed

A B C D E F G ···· @ is not displayed

H I J K L M N O ····

P Q R S T U V W ····

X Y Z [ / ] ^ _ ····

A B C D E F G ····

H I J K L M N O ····

P Q R S T U V W ····

X Y Z

···· { I }

are not displayed

····

i ¢ £ ¤ ¥ § are not displayed

···· 9 C ª

P R

are not displayed

···· 2 3

µ ¶ · are not displayed

¿ ···· 1 º

are not displayed

À Á ÂÃÄÅ

···· Æ Ç are not displayed

È É Ê Ë Ì Í Î Ï ····

Ñ ÒÓÔÕÖ

···· D

are not displayed

ÙÚÛÜ Y

···· Ø

ß are not displayed

ÀÁ ÂÃÄÅ

···· æ ç are not displayed

È É Ê Ë Ì Í Î Ï ····

Ñ ÒÓÔÕÖ

····

÷ are not displayed

ÙÚÛÜ Y

···· ø ÿ are not displayed

T All the same

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

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

! " # $ % & ´

(21h to 27h)1kHz 0dB L&R

( )

+ , . /

(28h to 2Fh)

0 1234567

(30h to 37h)

8 9 : ; < = > ?

(38h to 3Fh)

@A B C D E F G

(40h to 47h)

H I J K L M N O

(48h to 4Fh)

P Q R S T U V W

(50h to 57h)

X Y Z [ ¥ ] ^ _

(58h to 5Fh)

a b c d e f g

(60h to 57h)

h i j k l m n o

(68h to 6Fh)

p q r s t u v w

(70h to 77h)

xy z { I }

(78h to 7Fh)

i ¢£¤¥

(A0h to A7h) 8859-1

9 C ª

(A8h to AFh)

± 23 µ ¶ · (B0h to B7h)

1 º

(B8h to BFh)

ÀÁÂÃÄÅ Æ Ç

(C0h to C7h)

ÈÉÊË ÌÍÎÏ

(C8h to CFh)

D Ñ ÒÓÔ Õ Ö

(D0h to C7h)

Ø ÙÚÛÜ Y

(D8h to DFh)

à áâãäå æ ç

(E0h to E7h)

è é ê ë ìíîï

(E8h to FFh)

ñòóôõö ÷ (F0h to F7h)

ø ùúûü y

(F8h to FFh)

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