Sony-CDPCX240-cd-sm 维修电路原理图.pdf

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1、 MICROFILMCDP-CX240US ModelCanadian ModelSPECIFICATIONSSERVICE MANUALCOMPACT DISC PLAYERModel Name Using Similar MechanismCDP-CX250CD Mechanism TypeCDM-40BBase Unit TypeKSM-213BKN/M-NOptical Pick-up TypeKSS-213B/S-NRadioFans.CN 收音机爱 好者资料库 2 CAUTIONUse of controls or adjustments or performance of pro

2、ceduresother 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 solde

3、ring iron around 270Cduring 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 radiationexceeding the limit for Cla

4、ss 1.This appliance is classified asa CLASS 1 LASER product.The CLASS 1 LASER PROD-UCT MARKING is located onthe rear exterior.The followingcaution label islocated inside ofthe unit.PARTS No.MODELMODEL IDENTIFICATION BACK PANEL 4-999-020-04-999-020-1USCanadianSAFETY-RELATED COMPONENT WARNING !COMPONE

5、NTS IDENTIFIED BY MARK ! OR DOTTED LINEWITH MARK ! ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTSWHOSE PART NUMBERS APPEAR AS SHOWN IN THISMANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT

6、!LES COMPOSANTS IDENTIFIS PAR UNE MARQUE ! SURLES DIAGRAMMES SCHMATIQUES ET LA LISTE DESPICES SONT CRITIQUES POUR LA SCURIT DEFONCTIONNEMENT. NE REMPLACER CES COMPOSANTSQUE PAR DES PICES SONY DONT LES NUMROSSONT DONNS DANS CE MANUEL OU DANS LESSUPPLMENTS PUBLIS PAR SONY.SAFETY CHECK-OUTAfter correct

7、ing the original service problem, perform the follow-ing safety checks 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 asdescribed below.LEAKAGEThe AC leakage from any exposed

8、 metal part to earth Ground andfrom all exposed metal parts to any exposed metal part having areturn to chassis, must not exceed 0.5 mA (500 microampers). Leak-age current can be measured by any one of three methods.1. A commercial leakage tester, such as the Simpson 229 or RCAWT-540A. Follow the ma

9、nufacturers instructions to use theseinstruments.2. A battery-operated AC milliammeter. The Data Precision 245digital multimeter is suitable for this job.3. Measuring the voltage drop across a resistor by means of a VOMor battery-operated AC voltmeter. The “limit” indication is 0.75V, so analog mete

10、rs must have an accurate low-voltage scale.The Simpson 250 and Sanwa SH-63Trd are examples of a pas-sive VOM that is suitable. Nearly all battery operated digitalmultimeters that have a 2V AC range are suitable. (See Fig. A)Fig. A. Using an AC voltmeter to check AC leakage.PART NO.0.15FTo Exposed Me

11、talParts on Set1.5kACvoltmeter(0.75V)Earth GroundRadioFans.CN 收音机爱 好者资料库 3 TABLE OF CONTENTS1. SERVICING NOTE. 32. GENERAL. 63. DISASSEMBLY3-1. Front Panel Assembly .73-2. Back Panel Assembly. 73-3. Base (Door, Gear) Assembly . 83-4. Table Assembly .83-5. Mechanism Deck . 93-6. Base Unit .94. TEST M

12、ODE.105. ADJUSTMENTS5-1. Mechanical Adjustment . 135-2. Electrical Block Checking . 196. DIAGRAMS6-1. Circuit Boards Location. 226-2. Block Diagrams BD Section. 23 Main Section.256-3. Schematic Diagram BD Section .296-4. Printed Wiring Board BD Section .316-5. Printed Wiring Board Main Section . 336

13、-6. Schematic Diagram Main (1/2) Section . 356-7. Schematic Diagram Jack Section . 376-8. Printed Wiring Board Jack Section .396-9. Schematic Diagram Display Section . 416-10. Printed Wiring Board Display Section . 436-11. Schematic Diagram Sensor/Motor Section .456-12. Printed Wiring Board Sensor/M

14、otor Section . 466-13. IC Block Diagrams. 476-14. IC Pin Functions. 497. EXPLODED VIEWS7-1. Case and Back Panel Section. 547-2. Disc Table Section . 557-3. Front Panel Section .567-4. Mechanism Section-1 (CDM-40B).577-5. Mechanism Section-2 (CDM-40B).587-6. Mechanism Section-3 (CDM-40B).597-7. Base

15、Unit Section (KSM-213BKN/M-N).608. ELECTRICAL PARTS LIST. 61SECTION 1SERVICING NOTENOTES ON HANDLING THE OPTICAL PICK-UP BLOCKOR BASE UNITThe laser diode in the optical pick-up block may suffer electrostaticbreak-down because of the potential difference generated by thecharged electrostatic load, et

16、c. on clothing and the human body.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepain parts.The flexible board is easily damaged and should be handled withcare.NOTES ON LASER DIODE EMISSION CHECKThe laser beam on thi

17、s model is concentrated so as to be focused onthe disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission, ob-serve from more than 30 cm away from the objective lens.The emission check enables continuous checking of the S curve.LA

18、SER DIODE AND FOCUS SEARCH OPERATIONCHECKCarry out the “S curve check” in “CD section adjustment” and checkthat the S curve waveform is output three times. 4 CD-TEXT TEST DISCThis unit is able to display the TEXT data (character information) written in the CD on its fluorescent indicator tube.The CD

19、-TEXT TEST DISC (TGCS-313:J-2501-126-A) 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 thedisc.2. The following wi

20、ll be displayed on the fluorescent indicator tube. (The display switches each time the TIME/TEXT button is pressed.)Display : Main Artist Test or CD TEXT TEST DISC (Album Title)3. Press the ” button and play back the disc.4. The following will be displayed on the fluorescent indicator tube. (If noth

21、ing is displayed, press the TIME/TEXT button.)Display : 1kHz/0 dB/ L&R5. Rotate 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 : CD-TEXT TEST D

22、ISC Recorded Contents and Display”.Restrictions in CD-TEXT DisplayIn 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

23、DISC TEXT Data Contents (TRACKS No. 1 to 41:Normal Characters)123456789101112131415161718192021TRACKNo.Displayed Contents2223242526272829303132333435363738394041TRACKNo.Displayed Contents1kHz/0dB/L&R20Hz/0dB/L&R40Hz/0dB/L&R100Hz/0dB/L&R200Hz/0dB/L&R500Hz/0dB/L&R1kHz/0dB/L&R5kHz/0dB/L&R7kHz/0dB/L&R10

24、kHz/0dB/L&R16kHz/0dB/L&R18kHz/0dB/L&R20kHz/0dB/L&R1kHz/0dB/L&R1kHz/-1dB/L&R1kHz/-3dB/L&R1kHz/-6dB/L&R1kHz/-10dB/L&R1kHz/-20dB/L&R1kHz/-60dB/L&R1kHz/-80dB/L&R1kHz/-90dB/L&RInfinity Zero w/o emphasis/L&RInfinity Zero with emphasis/L&R400Hz+7kHz(4:1)/0dB/L&R400Hz+7kHz(4:1)/-10dB/L&R19kHz+20kHz(1:1)/0dB

25、/L&R19kHz+20kHz(1:1)/-10dB/L&R100Hz/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&R1kHz Squer Wave/L&R1kHz w/emphasis/-0.37dB/L&R5kHz w/emphasis/-4.53dB/L&R16kHz w/emphasis/-9.04dB/L&RNOTE : The contents of Track No. 1 to 41 are the same a

26、s those of the current TEST DISC-their titles are displayed. 5 TRACKNo.Recorded contentsDisplayN All the sameN All the sameN All the sameN All the sameN All the sameN All the sameN All the sameX Y Z _ (58N All the sameN All the sameN All the samex y z I (78(A0 is not displayed(A8 C PRare not display

27、ed (B023 are not displayed (B81 are not displayedN All the sameN All the sameN All the same Y (D8N All the sameN All the same o (F0N All the sameN All the sameN All the sametoN All the same*4243444546474849505152535455565758596061626364656667to99! ” # $ %& (21h to 27h)1kHz 0dB L&R( )+ , . /(28h to 2

28、Fh)0 1 2 3 4 5 6 7(30h to 37h)8 9 : ; ?(38h to 3Fh)A B C D E F G(40h to 47h)H I J K L MNO(48h to 4Fh)P Q R 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) 8859-1C PR(A8h to AFh)23 (B0h to B7h)1(B

29、8h to BFh) (C0h to C7h) (C8h to CFh)D (D0h to D7h) Y(D8h to DFh) (E0h to E7h) (E8h to FFh) (F0h to F7h) y(F8h to FFh)No.66No.67 toNo.99141234141234Table 2: CD-TEXT TEST DISC Recorded Contents and Display(In this unit, some special characters cannot be displayed. This is no a fault.) 6 LOCATION OF PA

30、RTS AND CONTROLS11/u (power) button2STANDBY indicator3Display window4Front cover5MEGA control button and indicator6X-FADE button7INPUT button8DISC/CHARACTOR dial and PUSH ENTER button9FADER button10 NO DELAY button11 MEMO SEARCH button12 CHECK button13 CLEAR button14 p (stop) button15 P (pause) butt

31、on and indicator16 (play) button and indicator17 AMS button18 OPEN/CLOSE button19 TIME/TEXT button20 REPEAT button21 PROGRAM button22 SHUFFLE button23 CONTINUE button24 HIT LIST button and indicator25 GROUP FILE button26 GROUP 1 to 8 button and indicator27 KEY BOARD jack28 TIMER (OFF/PLAY) switch* A

32、MS is abbreviation for Automatic Music Sensor.SECTION 2GENERALFront Panel345678129 10 1112 13141516171827282425261920212223 7 SECTION 3DISASSEMBLYNote : Follow the disassembly procedure in the numerical order given.3-1. FRONT PANEL ASSEMBLY3-2. BACK PANEL ASSEMBLY1 Two screws (BVTP3x8)2 Two screws (

33、BVTP 3x8)3 Four screws (BVTT3x6)5 Remove the claw6 Remove the claw7 Front panel assembly4 Flat type wire (17 core) (Main board, CN501)5 Remove the PC board holder7 Back panel1 Connector (CN906)2 Two screws (BVTT3X6)3 Seven screws (BVTT3X6)4 Three screws (BV3X6) 8 3-3. BASE (DOOR, GEAR) ASSEMBLY3-4.

34、TABLE ASSEMBLY2 Three screws (BVTT3x6)3 Screw (PSW3x6)4 Connector (CN503)5 Guide assemblyMAIN board7 Three screws (BVTT3x6)8 Three screws (BVTT3x6)6 Door (CD) assembly9 Base (Door, Gear) assembly1 Screw (BVTT3x6)1 Stop ring (E type)4 Table assembly5 Washer2 Two screws (BVTT3x6)3 Two holder assemblie

35、s 9 3-5. MECHANISM DECK3-6. BASE UNIT5 Mechanism deckJack boardMain boardMain board1 Flat type wire (23core) (CN502)4 Nine screws (BVTT3x8)2 Connector (CN904)3 Connector (CN505)1 Screw (BVTT3x6)2 Fulcrum plate (BU Upper) assembly3 Base unit 10 SECTION 4TEST MODE4-1. DISPLAY CHECK MODEWith the power

36、turned off (standby state), press the 1/u buttonwhile 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 lights up simultaneously.Note: To exit this mode, press the p (stop) button.4-2. ADJ MODE1.

37、 Turn ON the power of the unit, set disc to disc table, and per-form chucking.2. Disconnect the power supply plug from the outlet.3. To set ADJ mode, connect the test point (ADJ) of the MAINboard to Ground, and connect the power supply plug to the outlet.The power will turn on automatically, and the

38、 first track will beplayed.In this mode, table rotation and loading operations are not performedbecause it is taken that the disc has already been chucked.Note:The same operations are also performed in the following whenthe test point (ADJ) is connected to Ground after turning onthe power. Direct se

39、arch (movement of sledding motor) is not performed dur-ing 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 toADJ Mode Special Functions Tabl

40、e)ADJ Mode Special Functions Table(The buttons shown with ( ) function by using the sup-plied remote commander only)4-3. KEY AND DISPLAY CHECK MODETo set this mode, connect the test point (AFADJ) on the MAINboard to Ground, and connect the power supply plug to the outlet. All FL segments and grids w

41、ill light up. (All lit check)When a button is pressed, the types of buttons pressed until thenwill be displayed on the left side and the number of the buttonswill be displayed on the right side. However, these will not bedisplayed for the following special buttons. p (stop) button:FL segment check(R

42、efer to FL Tube Check Patterns) P (pause) button: FL grid check(Refer to FL Tube Check Patterns)The pause LED also lights up simultaneously. (play) button: All FL segment and grid will light up.The play LED also lights up simultaneously.FL Tube Check PatternsSegment check When the jog dial is rotate

43、d to the right, the GROUP LEDs lightup in the order of 1n2.8n1. When the jog dial is rotated to the left, the GROUP LEDs light upin the order of 8n7.1n8. Abbreviation FL: Fluorescent Indicator Tube MAIN BOARD Component Side ButtonCONTINUESHUFFLEPROGRAMGROUP 1 (1)GROUP 2 (2)GROUP 3 (3)GROUP 4 (4)GROU

44、P 5 (5)GROUP 6 (6)GROUP 7 (7)GROUP 8 (8)(9)(10/0)CHECKCLEARFunctionServo average displayDisplays VC, FE, RF, TE and traverse in hexadecimalnumbersFocus bias displayEach time this is pressed, the focus bias is switchedbetween 1 and 2(1)Bias actually set Optimum bias Minimum jitter(2)U:Upper aliasing

45、bias L:Lower aliasing biasAuto gain displayDisplays focus, tracking, sledding in hexadecimalnumbersIncreases the focus bias in 8 steps.Sets the focus bias in the middle of aliasing.Turns off the tracking and sledding servoReturns the auto gain to the initial value (30)Turns off the focus servoDecrea

46、ses the focus bias in 8 steps.Re-adjusts the focus biasTurns on the tracking and sledding servoSwitches the focus servo gain between normal and downFG. norm: normal, FG. down: downSets the focus bias to 0 (no bias)Next, displays the jitter measured at the focus bias setS-curve observation mode.(Exit

47、s this mode when the p button is pressed.)Automatic eccentric measurementThe results of measurement is displayed in m directly.Grid checkMagnifiedABCDE16RV501DISC SENSOR ADJUSTMENTCN506TP2(AFADJ)TP1(ADJ)R540IC501R531 11 4-4. AGING MODEAging Mode Mode which repeatedly changes and plays back discs aut

48、omati-cally 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 theunit is equipped with the “se

49、lf-protection function during errors”described later.The function serves to maintain the state of the unit when errorsoccur.Sequence of Aging Mode$1. Disc change2. Load in3. TOC read4. Access of last track5. 3 second playback6. Access of first track7. 3 second playback8. Load out9. FRONT COVER open1

50、0. FRONT COVER close$Order of Disc Change (1 cycle takes 3 minutes)$1. No. 402. No. 803. No. 1204. No. 1605. No. 200$Special Aging Mode FunctionsThe aging mode is provided with the following convenient functions Disc setting mode (*1) Selection of presence of protection function during error (*2) Co