Sony-CDP-CX240-Service-Manual电路原理图.pdf

MICROFILM CDP-CX240 US Model Canadian Model SPECIFICATIONS SERVICE MANUAL COMPACT DISC PLAYER Model Name Using Similar MechanismCDP-CX250 CD Mechanism TypeCDM-40B Base Unit TypeKSM-213BKN/M-N Optical Pick-up TypeKSS-213B/S-N RadioFans.CN 收音机爱 好者资料库 2 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 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 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. The following caution label is located inside of the unit. PARTS No.MODEL MODEL IDENTIFICATION BACK PANEL 4-999-020-0 4-999-020-1 US Canadian 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. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. SAFETY CHECK-OUT After correcting 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 as described below. LEAKAGE The AC leakage from any exposed metal part to earth Ground and from all exposed metal parts to any exposed metal part having a return 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 RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters 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 digital multimeters that have a 2V AC range are suitable. (See Fig. A) Fig. A. Using an AC voltmeter to check AC leakage. PART NO. 0.15F To Exposed Metal Parts on Set 1.5k AC voltmeter (0.75V) Earth Ground RadioFans.CN 收音机爱 好者资料库 3 TABLE OF CONTENTS 1. SERVICING NOTE. 3 2. GENERAL. 6 3. DISASSEMBLY 3-1. Front Panel Assembly .7 3-2. Back Panel Assembly. 7 3-3. Base (Door, Gear) Assembly . 8 3-4. Table Assembly .8 3-5. Mechanism Deck . 9 3-6. Base Unit .9 4. TEST MODE.10 5. ADJUSTMENTS 5-1. Mechanical Adjustment . 13 5-2. Electrical Block Checking . 19 6. DIAGRAMS 6-1. Circuit Boards Location. 22 6-2. Block Diagrams BD Section. 23 Main Section.25 6-3. Schematic Diagram BD Section .29 6-4. Printed Wiring Board BD Section .31 6-5. Printed Wiring Board Main Section . 33 6-6. Schematic Diagram Main (1/2) Section . 35 6-7. Schematic Diagram Jack Section . 37 6-8. Printed Wiring Board Jack Section .39 6-9. Schematic Diagram Display Section . 41 6-10. Printed Wiring Board Display Section . 43 6-11. Schematic Diagram Sensor/Motor Section .45 6-12. Printed Wiring Board Sensor/Motor Section . 46 6-13. IC Block Diagrams. 47 6-14. IC Pin Functions. 49 7. EXPLODED VIEWS 7-1. Case and Back Panel Section. 54 7-2. Disc Table Section . 55 7-3. Front Panel Section .56 7-4. Mechanism Section-1 (CDM-40B).57 7-5. Mechanism Section-2 (CDM-40B).58 7-6. Mechanism Section-3 (CDM-40B).59 7-7. Base Unit Section (KSM-213BKN/M-N).60 8. ELECTRICAL PARTS LIST. 61 SECTION 1 SERVICING NOTE 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 repain 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, ob- serve from more than 30 cm away from the objective lens. The emission check enables continuous checking of the S curve. 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 three times. 4 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. 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 the disc. 2. The following will 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 nothing is displayed, press the TIME/TEXT button.) Display : 1kHz/0 dB/ L ?(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) 8859-1 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 FFh) (F0h to F7h) y(F8h to FFh) No.66 No.67 to No.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.) 6 LOCATION OF PARTS AND CONTROLS 11/u (power) button 2STANDBY indicator 3Display window 4Front cover 5MEGA control button and indicator 6X-FADE button 7INPUT button 8DISC/CHARACTOR dial and PUSH ENTER button 9FADER button 10 NO DELAY button 11 MEMO SEARCH button 12 CHECK button 13 CLEAR button 14 p (stop) button 15 P (pause) button and indicator 16 (play) button and indicator 17 AMS button 18 OPEN/CLOSE button 19 TIME/TEXT button 20 REPEAT button 21 PROGRAM button 22 SHUFFLE button 23 CONTINUE button 24 HIT LIST button and indicator 25 GROUP FILE button 26 GROUP 1 to 8 button and indicator 27 KEY BOARD jack 28 TIMER (OFF/PLAY) switch * AMS is abbreviation for Automatic Music Sensor. SECTION 2 GENERAL Front Panel 345678 1 2 9 10 11 12 13 1415161718 27 28 2425261920212223 7 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. FRONT PANEL ASSEMBLY 3-2. BACK PANEL ASSEMBLY 1 Two screws (BVTP3x8) 2 Two screws (BVTP 3x8) 3 Four screws (BVTT3x6) 5 Remove the claw 6 Remove the claw 7 Front panel assembly 4 Flat type wire (17 core) (Main board, CN501) 5 Remove the PC board holder 7 Back panel 1 Connector (CN906) 2 Two screws (BVTT3X6) 3 Seven screws (BVTT3X6) 4 Three screws (BV3X6) 8 3-3. BASE (DOOR, GEAR) ASSEMBLY 3-4. TABLE ASSEMBLY 2 Three screws (BVTT3x6) 3 Screw (PSW3x6) 4 Connector (CN503) 5 Guide assembly MAIN board 7 Three screws (BVTT3x6) 8 Three screws (BVTT3x6) 6 Door (CD) assembly 9 Base (Door, Gear) assembly 1 Screw (BVTT3x6) 1 Stop ring (E type) 4 Table assembly 5 Washer 2 Two screws (BVTT3x6) 3 Two holder assemblies 9 3-5. MECHANISM DECK 3-6. BASE UNIT 5 Mechanism deck Jack board Main board Main board 1 Flat type wire (23core) (CN502) 4 Nine screws (BVTT3x8) 2 Connector (CN904) 3 Connector (CN505) 1 Screw (BVTT3x6) 2 Fulcrum plate (BU Upper) assembly 3 Base unit 10 SECTION 4 TEST MODE 4-1. DISPLAY CHECK MODE With the power turned off (standby state), press the 1/u button while 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 MODE 1. 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 MAIN board to Ground, and connect the power supply plug to the outlet. The power will turn on automatically, and the first track will be played. In this mode, table rotation and loading operations are not performed because it is taken that the disc has already been chucked. Note:The same operations are also performed in the following when the test point (ADJ) is connected to Ground after turning on the power. Direct search (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 to ADJ Mode Special Functions Table) ADJ Mode Special Functions Table (The buttons shown with ( ) function by using the sup- plied remote commander only) 4-3. KEY AND DISPLAY CHECK MODE To set this mode, connect the test point (AFADJ) on the MAIN board to Ground, and connect the power supply plug to the outlet. All FL segments and grids will light up. (All lit check) When a button is pressed, the types of buttons pressed until then will be displayed on the left side and the number of the buttons will be displayed on the right side. However, these will not be displayed for the following special buttons. p (stop) button:FL segment check (Refer 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 Patterns Segment check When the jog dial is rotated to the right, the GROUP LEDs light up in the order of 1n2.8n1. When the jog dial is rotated to the left, the GROUP LEDs light up in the order of 8n7.1n8. Abbreviation FL: Fluorescent Indicator Tube MAIN BOARD Component Side Button CONTINUE SHUFFLE PROGRAM GROUP 1 (1) GROUP 2 (2) GROUP 3 (3) GROUP 4 (4) GROUP 5 (5) GROUP 6 (6) GROUP 7 (7) GROUP 8 (8) (9) (10/0) CHECK CLEAR Function Servo average display Displays VC, FE, RF, TE and traverse in hexadecimal numbers Focus bias display Each time this is pressed, the focus bias is switched between 1 and 2 (1) Bias actually set Optimum bias Minimum jitter (2) U:Upper aliasing bias L:Lower aliasing bias Auto gain display Displays focus, tracking, sledding in hexadecimal numbers Increases the focus bias in 8 steps. Sets the focus bias in the middle of aliasing. Turns off the tracking and sledding servo Returns the auto gain to the initial value (30) Turns off the focus servo Decreases the focus bias in 8 steps. Re-adjusts the focus bias Turns on the tracking and sledding servo Switches the focus servo gain between normal and down FG. norm: normal, FG. down: down Sets the focus bias to 0 (no bias) Next, displays the jitter measured at the focus bias set S-curve observation mode. (Exits this mode when the p button is pressed.) Automatic eccentric measurement The results of measurement is displayed in m directly. Grid check Magnified ABCDE 16 RV501 DISC SENSOR ADJUSTMENT CN506 TP2 (AFADJ) TP1 (ADJ) R540 IC501 R531 11 4-4. AGING MODE Aging Mode Mode which repeatedly changes and plays back discs automati- 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 the unit is equipped with the “self-protection function during errors” described later. The function serves to maintain the state of the unit when errors occur. Sequence of Aging Mode $ $ $ 1. Disc change 2. Load in 3. TOC read 4. Access of last track 5. 3 second playback 6. Access of first track 7. 3 second playback 8. Load out 9. FRONT COVER open 10. FRONT COVER close $ $ $ $ $ $ Order of Disc Change (1 cycle takes 3 minutes) $ $ $ 1. No. 40 2. No. 80 3. No. 120 4. No. 160 5. No. 200 $ $ $ Special Aging Mode Functions The aging mode is provided with the fo