Sony-CDPXB920-cd-sm 电路图 维修手册.pdf

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1、CDP-XB920/XB920E AEP Model CDP-XB920 UK Model E Model CDP-XB920E SERVICE MANUAL COMPACT DISC PLAYER MICROFILM SPECIFICATIONS Model Name Using Similar MechanismCDP-XE900/XE900E CD Mechanism TypeCDM36C-14D Base Unit TypeBU-14D Optical Pick-up TypeKSS-213B/K-N Photo : CDP-XB920 Compact disc player Lase

2、rSemiconductor laser ( = 780 nm) Emission duration: continuous Laser outputMax 44.6 W* * 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 response2 Hz to 20 kHz 0.5 dB Signal-to-noise ratioMore than 1

3、13 dB Dynamic rangeMore than 99 dB Harmonic distortionLess than 0.0025% Channel separationMore than 105 dB General Power requirements220 V 230 V AC, 50/60 Hz Power consumption15W Dimensions (approx.)430 115 290 mm (w/h/d)(17 4 5/8 11 1/2 in.) incl. projecting parts Mass (approx.)5.5 kg (12 lbs 2 oz)

4、 Supplied accessories Audio cord (2 phono plugs2 phono plugs) (1) Remote commander (remote) (1) Sony SUM-3 (NS) batteries (2) Stabilizer (1) Design and specifications are subject to change without notice. Outputs JackMaximumLoad typeoutputimpedance level LINE OUTPhono2 VOver 50 kilohms jacks(at 50 k

5、ilohms) DIGITALOptical18 dBmWave length:660nm OUToutput (OPTICAL)connector DIGITALCoaxial0.5 Vp-p75 ohms OUToutput(at 75 ohms) (COAXIAL)connector PHONESStereo10 mW32 ohms (only for CDP-XB920,phone CDP-XB820 andjack CDP-XB720) RadioFans.CN 收音机爱 好者资料库 2 This appliance is classified as a CLASS 1 LASER

6、product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. TABLE OF CONTENTS 1. SERVICING NOTE 5 2. GENERAL 6 3. DISASSEMBLY 3-1. Slide Rack 8 3-2. Front Panel 8 4. TEST MODE 9 5. ELECTRICAL BLOCK CHECKING11 6. DIAGRAMS 6-1. Circuit Boards Location 13 6-2. Block Diagram 15 6-3. Sche

7、matic Diagram Main Section (1/2) 17 6-4. Schematic Diagram Main Section (2/2) 19 6-5. Printed Wiring Board Main Section 21 6-6. Schematic Diagram Display Section 23 6-7. Printed Wiring Board Display Section 25 6-8. Schematic Diagram Power section 27 6-9. Printed Wiring Board Power section 29 6-10.Sc

8、hematic Diagram Servo section 31 6-11.Printed Wiring Board Servo section 33 6-12.Schematic Diagram Motor section 35 6-13.Printed Wiring Board Motor section 36 6-14.IC Block Diagrams 37 6-15.IC Pin Function Description 39 7. EXPLODED VIEWS 43 8. ELECTRICAL PARTS LIST48 The laser component in this pro

9、duct is capable of emitting radiation exceeding the limit for Class 1. SAFETY-RELATED COMPONENT WARNING ! COMPONENTS IDENTIFIED BY MARK ! OR DOT- TED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPO- NENTS WITH SONY PARTS WHOSE PART

10、 NUM- BERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. 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

11、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. This caution label is located inside the unit. CAUTION Use of controls or adjustments or perfo

12、rmance of procedures other than those specified herein may result in hazardous radiation exposure. MODEL IDENTIFICATION BACK PANEL 4-997-198-0: XB920 (AEP) model 4-997-198-1: XB920E (UK) model 4-997-198-3: XB920E (Singapore, Malaysia) model RadioFans.CN 收音机爱 好者资料库 3 CD-TEXT TEST DISC This unit is ab

13、le 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 a tray, and chuck

14、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 4.Rotate AMS knob 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

15、: CD-TEXT 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. Table 1 :CD-TEXT TEST DISC Recorded Data Contents and Display (TRACKS No. 1 to 32

16、:Normal Characters) TRACK No. Recorded contentsDisplay 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 1kHz/0dB/L (38h to 3Fh) are not displayed A B C D E F G (40h to 47h) are not displayed H I J K L MN O (48h to 4Fh) are not displayed P QR S T U V W (50h to 57

17、h) are not displayed X Y Z _ (58h to 5Fh) are not displayed A B C D E F G (60h to 67h) are not displayed H I J K L MN O (68h to 6Fh) are not displayed P QR S T U V W (70h to 77h) are not displayed X Y Z I (78h to 7Fh) are not displayed All no displayed C P R (A8h to AFh)are not displayed 2 3 m (B0h

18、to B7h) are not displayed 1 (B8h to BFh) are not displayed (C0h to C7h) are not displayed (C8h to CFh) are not displayed (D0h to D7h) are not displayed Y (D8h to DFh) are not displayed (E0h to E7h) are not displayed (E8h to EFh) are not displayed (F0h to F7h) are not displayed Y (F8h to FFh) are not

19、 displayed NO. 66 NO. 67 to NO. 99 TRACKRecorded contentsDisplay Table 2: CD-TEXT TEST DISC Recorded Contents and Display (TRACKS NO. 33 to 99) (In this unit, some special characters cannot be displayed. This is no a fault.) 3 4 1 2 1 43 4 1 2 1 4 * Other channel is infinity zero. 33 34 35 36 37 38

20、39 40 41 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 100Hz/0dB/R* 1kHz/0dB/R* 10kHz/0dB/R* 20kHz/0dB/R* 100Hz Squer Wave /L ? (38h to 3Fh) A B C D E F G (40h to 47h) H I J K L M NO (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

21、 to 67h) hi 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 C PR (A8h to AFh) 23 (B0h to B7h) 1 (B8h to BFh) (C0h to C7h) (C8h to CFh) D (D0h to D7h) Y (D8h to DFh) (E0h to E7h) (E8h to EFh) (F0h to F7h) y (F8h to FFh) No.66 No.67 to No.99 5 SECTION 1

22、 SERVICING NOTE HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF Insert a screwdriver into the aperture of the unit bottom, and move it in the direction of arrow. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic break

23、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 breakdown and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily dama

24、ged 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 c

25、m 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 two times. 6 SECTION 2 GENERAL 1 U (POWER) switch 2 PLAY MODE button 3 REPEAT button 4 FADER button 5 TIME/TEXT button 6

26、 0 button 7 ) button 8 EDIT/TIME FADE button 9 CHECK button 0 CLEAR button ! AMS knob ! p (stop) button ! P (pause) button ! (play) button ! OPEN/CLOSE button ! LANGUAGE button ! MUSIC SCAN button ! AUTO SPACE button ! PEAK SEARCH button FILTER STD switch POWER LEVEL volume PHONES jack LOCATION AND

27、FUNCTION OF CONTROLS FRONT PANEL 1234567 89!? !?!?!?!?!? ? !? !? !? !? 7 This section is extracted from operating instructions. 8 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. claws claws A 2 Slide rack (Disengage claws to remove the rack.) 1 Eject CD by

28、 moving A in the direction of the arrow. 6 Five screws (+BVTP 3 8) 7 Front panel (Disengage claws to remove the rack.) 3 Flat cable 2 Connector 4 Connector 5 Four screws (+BVTP 3 8) 1 Two connectors claws claws 3-1.SLIDE RACK 3-2.FRONT PANEL 9 When the p button is pressed, the following will be disp

29、layed. (partial lighting 2) When the OPEN/CLOSE button is pressed, all will light up again. Key check All buttons have corresponding button numbers. When a button is pressed, the counter will count up and display the buttons number. However, the counter will only count to “18”. It will not count for

30、 buttons already pressed once, but will display the buttons number.(Partial lighting 3) SECTION 4 TEST MODE 4-1. AF MODE The following checks can be performed in the AF mode, which is set by connecting the TP51 (AFADJ) terminal on MAIN board to the Ground and turning on the power. FL tube check Afte

31、r all segments light up, when the button is pressed, the following will be displayed. (Partial lighting 1) Remote commander check When the button of the remote commander is pressed, the following will be displayed. All go off when the other buttons are pressed. (Partial lighting 4) LANGUAGE MUSIC SC

32、AN AUTO SPACE PEAK SEARCH PLAY MODE REPEAT FADER TIME/TEXT 0 ) 0 1 2 3 4 5 6 7 8 9 EDIT/ TIME FADE CHECK CLEAR P ENTER OPEN/CLOSE PLAY STOP p 11 12 18 20 Button No. Displayed Button No. Displayed ButtonButton 24 6810 1214 161820 (Partial lighting 2) Audio check Initial setting of digital filter and

33、release of mute. When the TP51 (AFADJ) terminal on MAIN board is set to HIGH (VDD), emphasis turns on. When set to LOW (Ground), it turns off. 10 Partial lighting 1 Partial lighting 2 ALL lit A B C D E F (Partial lighting 1) 88 TOTAL? 88 Display of counting Display of button number ? (Partial lighti

34、ng 3) ? ? (Partial lighting 4) REMOCON PLAY When you turn the AMS knob clockwise JOG RIGHT JOG LEFT When you turn the AMS knob counter-clockwise 10 4-2. ADJ MODE The following operations are performed in the ADJ mode, which is set by connecting the TP21 (ADJ) terminal to the Ground and turning on th

35、e power. During playback, there is no problem even if the GFS is continu- ously 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 per- formed. (For details of operat

36、ions, refer to Table of Key Operations in ADJ Mode.) 4-3. CLV-S MODE The spindle servo for playback sets into the CLV-S mode when the TP21 (ADJ) terminal is connected to Ground after turning on the power. TABLE OF BUTTON OPERATIONS IN ADJ MODE The jitter value display mode can be set after the all-m

37、usic 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) 1 2 3 4 5 6 7 8 9 10 Focus bias 8-step up (hexadecimal) Middle of focus bias up/down turning point Focus bias

38、optimum point, jitter value Tracking servo, sled servo off Tracking gain up Focus bias 8-step down (hexadecimal) Immediate readjustment of focus bias Focus bias 00 point Tracking servo, sled servo on Tracking gain down FunctionButton 4-4. AGING MODE This unit is equipped with an aging mode to check

39、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 repeatedly. Aging method 1 (When using the aging mode remote controller (J-2501-123-A): 1.Press the U button

40、 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 fluoresent display tube. 5.To end, press the U button. Aging method 2 (When no aging mode remote controller): 1.Pres

41、s the U button and turn ON the power. 2.Set the disc on the tray. 3.Press the OPEN/CLOSE button, p button, and MUSIC SCAN button at the same time. (If these buttons are not pressed at the same time, nothing performs.) 4.Aging starts and the message shown in Fig. 1 is displayed on the fluoresent disp

42、lay tube. 5.To end, press the U button. R350 CN305CN304 TP21 (ADJ) TP51 (AF ADJ) MAIN BOARD (Component Side) Display when normal State 0 1 2 3 4 5 6 Load in Access to TOC Access to last track Playback of last track (3 seconds) Access to first track Playback of first track (3 seconds) Load out Code N

43、o. Display when abnormal 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 Fig.1 Message in Aging Mode 11 SECTION 5 ELECTRICAL BLOCK CHECKING Note: 1.CD Block is basically designed to operate without adjustment. Therefore,

44、 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 an applicator with neutral detergent when the signal level is low than specified value with the following checks. Procedure :

45、1.Connect oscilloscope to test point TP (FE) on SERVO board. 2.Connect between test point TP (FEI) and TP (VC) by lead wire. 3.Turn U (power) switch on. 4.Put disc (YEDS-18) in and turn U (power) switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and

46、 out.) 5.Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 31 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

47、 time as long as possible and light up the brightness to obtain best waveform. Procedure : 1.Connect oscilloscope to test point TP (RF) on SERVO board. 2.Turn U (power) switch on. 3.Put disc (YEDS-18) in to play the number five track. 4.Confirm that oscilloscope waveform is clear and check RF signal

48、 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. Procedure : 1.Connect oscilloscope to test point TP (TE) on SERVO board. 2.Turn U (power) switch on. 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 oscilloscopes waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following : A/B x 100 = less than 22% Procedure : 1.Connect oscill