Sony-CDPXB740-cd-sm 电路图 维修手册.pdf

《Sony-CDPXB740-cd-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Sony-CDPXB740-cd-sm 电路图 维修手册.pdf（38页珍藏版）》请在收音机爱好者资料库上搜索。

1、1 CDP-XB740/XB740E AEP Model CDP-XB740 UK Model CDP-XB740E SPECIFICATIONS SERVICE MANUAL COMPACT DISC PLAYER Model Name Using Similar MechanismCDP-XB720/XB720E CD Mechanism TypeCDM14FLS-5BD25 Base Unit TypeBU-5BD25 Optical Pick-up TypeKSS-213BA/F-NP Photo: CDP-XB740 RadioFans.CN 收音机爱 好者资料库 2 SAFETY-

2、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. CAUTI

3、ON 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. Fle

4、xible Circuit Board Repairing Keep the temperature of soldering iron around 270C 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 produc

5、t 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. DISAS

6、SEMBLY 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 Mai

7、n 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

8、 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. RadioFans.CN

9、收音机爱 好者资料库 3 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 TH

10、E 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

11、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 le

12、ns 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 continuou

13、sly. RadioFans.CN 收音机爱 好者资料库 4 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 D

14、ISC TEXT Data Contents (TRACKS No. 1 to 41:Normal Characters) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 TRACK No. Displayed Contents 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 TRACK No. Displayed Contents 1kHz/0dB/L are not displayed A B C D E F G is not displayed H I J

15、K L MNO P QR S T U VW X Y Z / _ A B C D E F G H I J K L MNO P QR S T U VW X Y Z I are not displayed i are not displayed 9 C P R are not displayed 2 3 are not displayed 1 are not displayed are not displayed D are not displayed Y are not displayed are not displayed are not displayed Y are not displaye

16、d T All the same T All the same to T All the same * 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 to 99 1 4 1 2 3 4 1 4 1 2 3 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.) *

17、! ” # $ % ?(38h to 3Fh) A B C D E F G(40h to 47h) H I J K L MNO(48h to 4Fh) P QR S T U VW(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) x y z I (78h to 7Fh) i (A0h to A7h) 8859-1 9C PR (A8h to AFh) 23 (B0h to B7h) 1 (B8h to BFh) (C0

18、h to C7h) (C8h to CFh) D (D0h to C7h) Y(D8h to DFh) (E0h to E7h) (E8h to FFh) (F0h to F7h) y(F8h to FFh) No.66 No.67 to No.99 . . 6 LOCATION OF PARTS AND CONTROLS 1POWER switch 2PLAY MODE button 3REPEAT button 4FADER button 5TIME/TEXT button 6Disc tray 7m,M button 8EDIT/TIME FADE button 9CHECK butto

19、n 10 CLEAR button 11 AMS knob (PUSH ENTER) 12 x (stop) button 13 X (pause) button 14 H (play) button 15 A OPEN CLOSE button 16 Window display 17 LANGUAGE button 18 MUSIC SCAN button 19 AUTO SPACE button 20 PEAK SEARCH button 21 FILTER (STANDARD-1-2-3) switch 22 PHONE jack (AEP, AED model) * AMS is t

20、he abbreviation for Automatic Music Sensor. Abbreviation AED : North European SECTION 2 GENERAL Front Panel 23456789101 11 1215141316171819202122 7 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. FRONT PANEL In order to remove the front panel block wh

21、en the power supply does not turn on, rotate the cam with tapering driver as the figure shows, and the loading part will be moved. Then pull out the loading part by your hand to remove the loading panel as the figure shows. After that take out the front panel block. 3-2. BASE UNIT (BU-5BD25) Taperin

22、g driver Loading part Loading panel 4 Remove the Base unit (BU-5BD25) to the direction of arrow. 1 Turn the cam to the direction of arrow (counter clock wise) by tapering driver. 2 Take off the disc table. 3 Yoke bracket BU-5BD25 8 SECTION 4 TEST MODE FunctionButton Tracking servo, sled servo off Tr

23、acking servo, sled servo on S curve continuous output check mode 4 9 11 4-1. AF MODE The following checks can be performed in the AF mode, which is set by connecting the JW004 (AFADJ) terminal on MAIN board to the Ground and turning on the power. FL tube check After all segments light up, when the H

24、 button is pressed, the following will be displayed. (Partial lighting 1) When the x button is pressed, the following will be displayed. (partial lighting 2) The display will light up as follows (partial lighting 3) when the l AMS L knob is rotated to the right, and as follows (par- tial lighting 4)

25、 when rotated to the left. LANGUAGE MUSIC SCAN AUTO SPACE PEAK SEARCH PLAY MODE REPEAT FADER TIME EDIT CLEAR CHECK 10 11 12 18 20 All lit Partial lighting 1 Partial lighting 2 Button Button No. Displayed 0 1 2 3 4 5 6 7 8 9 Button Button No. Displayed Remote commander check When buttons other than t

26、he H button are pressed when the whole display is lit, the display will change to partial lighting 2. When the “H” button is pressed, the display will light up as follows. REMOCON PLAY (Partial lighting 5) When the OPEN/CLOSE A button is pressed, all will light up again. Key check All buttons have c

27、orresponding button numbers. When a button is pressed, the counter will count up and display the buttons num- ber. However, the counter will only count to “16”. It will not count for buttons already pressed once, but will display the buttons number. 88 TOTAL= 88 XX Display of button numberDisplay of

28、 counting A B C D E F (Partial lighting 1) (Partial lighting 2) JOG RIGHT JOG LEFT (Partial lighting 4) (Partial lighting 3) EDIT/ TIME FADE m M X ENTER (AMS) OPEN/ CLOSE A PLAY H STOP x 4-2. ADJ MODE The following operations are performed in the ADJ mode, which is set by connecting the JW003 (ADJ)

29、terminal to the Ground and turning on the power. Table of Button Operations in ADJ Mode The functions of the number buttons are shown in the following table. Function of Number Buttons (With the General Remote Commander) * NOTE : Other buttons are not used for servicing and should not be pressed wit

30、hout a reason. 42 1412 6810 161820 9 4-3. AGING MODE This unit is equipped with an aging mode to check operations of the mechanism deck. When faults occur: Aging stops, and the state when aging stopped is displayed on the fluorescent display tube. When no fault has occurred: Aging is continued repea

31、tedly. Aging method 1 (When using the aging mode remote controller (J-2501-123-A): 1. Press the POWER button and turn ON the power. 2. Set the disc on the tray. 3. Press the AGING START button of the aging remote controller. 4. Aging starts and the message shown in Fig. 1 is displayed on the fluores

32、cent display tube. 5. To end, press the POWER button. Aging method 2 (When no aging mode remote controller): 1. Press the POWER button and turn ON the power. 2. Set the disc on the tray. 3. Press the A OPEN/CLOSE button, x button, and MUSIC SCAN button at the same time. (If these buttons are not pre

33、ssed at the same time, nothing performs.) 4. Aging starts and the message shown in Fig. 1 is displayed on the fluorescent display tube. 5. To end, press the POWER button. Fig. 1 Message in Aging Mode 0 1 2 3 4 5 6 Load in Access to TOC Access to last track Playback of last track (3 seconds) Access t

34、o first track Playback of first track (3 seconds) Load out AGING-0 AGING-1 AGING-2 Counter display AGING-4 Counter display AGING-6 ERROR-0 ERROR-1 ERROR-2 ERROR-3 ERROR-4 ERROR-5 ERROR-6 Code No. State Display when normal Display when abnormal MAIN BOARD Component Side CN302 JW003 (ADJ) JW004 (AFADJ

35、) 10 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 10M impedance. 4. Clean the object lens by a

36、n applicator with neutral detergent when the signal level is low than specified value with the following checks. S Curve Check (With general remote commander) Procedure : 1. Connect oscilloscope to test point TP (FE) on BD board. 2. Connect the test point JW003 (ADJ) on MAIN board to the ground with

37、 a lead wire. 3. Turn ON the power. 4. Put disc (YEDS-18) in press H (play) button. 5. When the 11 button of the remote commander is pressed, the S curve will be output continuously. 6. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3

38、Vp-p. S-curve waveform 7. 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. oscilloscope BD board TP (F

39、E) TP (VC) + 1.5 1 symmetry A B Within 3 Vp-p + 1.5 1 oscilloscope BD board TP (FE) TP (VC) symmetry A B Within 3.8 1.1 Vp-p S Curve Check (Without general remote commander) Procedure : 1. Connect oscilloscope to test point TP (FE) on BD board. 2. Connect between test point TP (FEI) and TP (VC) by l

40、ead wire. 3. Connect both ends of TP R151 of the BD board to the lead wire. 4. Turn ON the power. 5. Put disc (YEDS-18) in and actuate the focus search. (actuate the focus search when disc table is moving in and out.) 6. Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And c

41、onfirm peak to peak level within 3.8 1 Vp-p. 7. After check, remove the lead wire connected in step 2 and 3. 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.

42、 RF Level Check VOLT/DIV : 200mV TIME/DIV : 500ns level : 1.2 0.2 Vp-p oscilloscope BD board TP (TE) TP (VC) S-curve waveform oscilloscope BD board TP (RF) TP (VC) Procedure : 1. Connect oscilloscope to test point TP (RF) on BD board. 2. Turn ON the power. 3. Put disc (YEDS-18) in to play the number

43、 five track. 4. Confirm that oscilloscope waveform is clear and check RF sig- nal level is correct or not. Note: A clear RF signal waveform means that the shape “” can be clearly distinguished at the center of the waveform. RF signal waveform E-F Balance (1 Track Jump) Check (Without general remote

44、commander) Procedure : 1. Connect oscilloscpe to test point TP (TE) on BD board. 2. Turn ON the power. 3. Put disc (YEDS-18) in to play the number five track. 4. Press the X (Pause) button. (Becomes the 1 track jump mode) 5. Check the level B of the oscilliscopes waveform and the A (DC voltage) of t

45、he center of the Traverse waveform. Confirm the following : A/B x 100 = less than 22% 11 E-F Balance Check (With general remote commander) Procedure : 1. Connect the test point JW003 (ADJ) on MAIN board to the ground with a lead wire on main board. 2. Connect oscilloscpe to test point TP (TE) on BD board. 3. Turn ON the power and 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.) 6. Check the level B of the oscilliscopes waveform and the A (DC voltage) of the cen