Sony-CDP-CX250-Service-Manual电路原理图.pdf

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1、 Model Name Using Similar MechanismNEW CD Mechanism TypeCDM-40 Base Unit TypeKSM-213BKN/M-N Optical Pick-up TypeKSS-213B/S-N SPECIFICATIONS MICROFILM COMPACT DISC PLAYER US Model Canadian Model AEP Model E Model Australian Model CDP-CX250 SERVICE MANUAL ,Canada Europe and Singapore220V-230V AC, 50Hz

2、 110V-120V or 230-240V AC, adjustable, 50/60 Hz E RadioFans.CN 收音机爱 好者资料库 2 MODEL IDENTIFICATION BACK PANEL TABLE OF CONTENTS 1. SERVICING NOTE.3 2. GENERAL .4 3. DISASSEMBLY 3-1.Front Panel Assembly. 12 3-2.Back Panel Assembly . 12 3-3.Table Assembly . 13 3-4.Mechanism Deck Assembly . 13 3-5.Base U

3、nit Assembly . 14 4. TEST MODE.15 5. ADJUSTMENTS 5-1.Mechanical Adjsument . 16 5-2.Electrical Block Checking. 22 6. DIAGRAMS 6-1.Circuit Boards Location . 24 6-2.IC Pin Function IC101 Digital Servo, Digital Signal Processor (CXD2545Q). 25 IC303 System Control (CXP84332-Q27Q) . 28 6-3.Block Diagram .

4、 31 6-4.Printed Wiring Board BD, DISP Section . 35 6-5.Schematic Diagram BD, DISP Section . 39 6-6.Printed Wiring Board MAIN Section . 43 6-7.Schematic Diagram MAIN Section . 47 6-8.IC Block Diagrams. 51 7. EXPLODED VIEWS 7-1.Case and Back Panel Section . 54 7-2.Disc table Section . 55 7-3.Front pan

5、el Section. 56 7-4.Mechanism Section-1 (CDM-40) . 57 7-5.Mechanism Section-2 (CDM-40) . 58 7-6.Base Unit Section-1 (KSM-213BKN/M-N). 59 7-7.Base Unit Section-2 (KSM-213BKN/M-N). 60 8. ELECTRICAL PARTS LIST. 61 4-982-813- CAUTION Use of controls or adjustments or performance of procedures other than

6、those specified herein may result in hazardous ra- diation exposure. The 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 PRODUCT MARKING is located on the rear exterior. This

7、caution label is located inside the unit. 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

8、 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. US Model: 0 Canadian Model: 1 AEP,German Model : 2 E Model: 3 Singapore Model: 4 Austrarian Model: 5 RadioFans.CN 收音机爱 好者资料库 3 ATTE

9、NTION 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 SUPPLME

10、NTS PUBLIS PAR SONY. 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 SUPPLEME

11、NTS PUBLISHED BY SONY. SAFETY CHECK-OUT (US model only) 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

12、. 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

13、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

14、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.

15、 (See Fig. A) 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

16、 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 refl

17、ective 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

18、curve waveform is output repeatedly. SECTION 1 SERVICING NOTE Fig. A. Using an AC voltmeter to check AC leakage. To Exposed Metal Parts on Set 0.15F1.5k AC voltmeter (0.75V) Earth Ground 4 SECTION 2 GENERAL LOCATION OF PARTS AND CONTROLS Front Panel 1 POWER button 2 CONTINUE button 3 Display window

19、4 SHUFFLE button 5 PROGRAM button 6 REPEAT button 7 TIME/TEXT button 8 Front cover 9 MEMO SEARCH button ! INPUT button ! Remote sensor ! JOG dial ! ENTER button ! CHECK button ! CLEAR button ! p (stop) button ! P (pause) button ! (play) button ! AMS* button OPEN button GROUP buttons 1-8 TIMER switch

20、 * AMS is the abbreviation for Automatic Music Sensor. ! 1 234567809! 5 for This section is extracted from instruction manual. 6 7 8 9 10 11 12 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. FRONT PANEL ASSEMBLY 3Two screws (BVTT3x6) 2Three screws (B

21、VTT3x6) 4Flat type wire (CN601) 1Connector (CN501) 3Five screws (BVTT3x6) 4Two screws (BVTP3x10) 2Four screws (BVTT3x6) 6Back panel 5Remove the PC board holder 3-2. BACK PANEL ASSEMBLY 7Front panel assembly 1Two screws (BVTP 3x8) 6Remove the claw 5Remove the claw 13 3-3. TABLE ASSEMBLY 1Stop ring (E

22、 type) 2Two screws (BVTT3x6) 7Washer 6Table assembly 3Two holder assemblies 4Three screws (BVTT3x6) 5Three holder assemblies 3-4. MECHANISM DECK Illumination board 3Connector (CN303) 2 Screw (BVTT3x6) 1Four screws (BVTT3x6) 4Connector (CN308)Jack board 5Guide assembly !Mechanism deck 6Flat type wire

23、 (23core) (CN303) Main board 7Connector (CN304) 8Connector (CN504) Main board Jack board 9Nine screws (BVTT3x8) 14 3-5. BASE UNIT 1Screw (BVTT3x6) 2Fulcrum plate (BU UPPER) assy 3Base unit 15 Button CONTINUE SHUFFLE PROGRAM GROUP 1 (1) GROUP 2 (2) GROUP 3 (3) GROUP 4 (4) GROUP 5 (5) GROUP 6 (6) GROU

24、P 7 (7) GROUP 8 (8) (9) (10/0) CHECK CLEAR SECTION 4 TEST MODE 4-1. Display Check Mode With the power turned off (standby state), press the POWER 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, th

25、e GROUP LEDs are scanned one by one. Note: To exit this mode, press the POWER button. 4-2. ADJ Mode 1. Turn ON the power of the unit, set disc to disc table, and perform chucking. 2. Disconnect the power supply plug from the outlet. 3. To set ADJ mode, connect the test point (TP301: ADJ) of the MAIN

26、 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

27、 also performed in the following when the test point (TP301: ADJ) is connected to Ground after turn- ing 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 decrea

28、se Spindle gain does not decrease Servo related settings can be set manually and checked (Refer to ADJ Mode Special Functions Table) 4-3. Key and Display Check Mode To set this mode, connect the test point (TP302: AFADJ) on the MAIN board to Ground, and connect the power supply plug to the outlet. A

29、ll 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(st

30、op) 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. Magnified Grid check ABCDE FL

31、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. The standby LED lights up when the door switch is shut. Abbreviation FL: Fluorescen

32、t Indicator Tube IC307 IC303 R310 R337 IC301 MAIN BOARD Component Side ADJ Mode Special Functions Table (The buttons shown with ( ) function by using the sup- plied remote commander only) Function Servo average display Displays VC, FE, RF, TE and traverse in hexadecimal numbers Focus bias display Ea

33、ch 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 i

34、n 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

35、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 Automatic eccentric measurement The results of measurement is displayed in m directly. TP302 AFADJ TP301 ADJ R311 16 SECTION 5 ADJUSTMENTS 5-1. MECHAN

36、ICAL ADJUSTMENT Perform the following steps before carrying out adjustments. 1. Turn ON the power of the unit, set disc to disc table No. 92, and perform chucking. 2. Turn OFF the power. 3. Remove the case. 4. While pressing the STOP button, turn ON the POWER button. The test mode is set. 5. The POW

37、ER button LED starts blinking. (Test mode) LED POWER button STOP button GROUP 1 button GROUP 5 button GROUP 1 buttonGROUP 5 button Cam Pulley POWER NOTE 1: The cam will start rotating when the GROUP 1 or GROUP 5 button is pressed continuously in the test mode. NOTE 2: If the power cannot be supplied

38、, the cam can be rotated by rotating the pulley with your finger. 17 SENSOR ALIGNMENT If the disc table swings to the left and right just before the disc is chucked, perform the following adjustment. Fixed screw Tapering screwdriver Luminus board Bracket (sensor) Lever (stopper) assembly Disc table

39、(2)Check that the lever (stopper) assem- bly secures the disc table as shown in the figure. (1)Rotate the cam and adjust to the position shown in the figure. Cam Bracket (sensor) Table assembly Swing LEVER (stopper) assembly Cam PAUSE button PLAY button (3)Loosen the fixed screw by 60 to 90, and use

40、 a tapering screwdriver to adjust the screw as shown in the figure. Move the bracket (sensor) with the tapering screwdriver little by little, and fix the fixed screw at where the play buttons LED (green) is switched to the pause buttons LED (orange) (or its reverse). (4)Moving the disc table right a

41、nd left with a hand after the screw is fixed, the table will move by the play of a disc table. If the LEDs light up alternately, the adjustment will be performed correctly. 18 GUIDE (DISC T) ALIGNMENT (2)Check that the state is as shown in the figure. (4)Move the holder (guide T) with a tapering scr

42、ewdriver, and set the position of the guide (disc T) to A:B=1:1. (3)Loosen the fixed screw by about 60 . Guide (disc T) CamHolder (guide T) Fixed screw Disc Guide (disc T) A B Disc Holder (guide T) Tapering screwdriver Cam Guide (disc T) Holder (guide T) (1)Rotate the cam and adjust to the position

43、shown in the figure. 19 HOLDER (DISC A) ALIGNMENT (1)Rotate the cam and adjust to the position shown in the figure. (3)After applying screw-lock to the part, rotate the thrust screw until the holder (Disc A) comes to the center of the disc. Cam Thrust screw Cam Disc Disc Holder (disc A) Thrust screw

44、 Holder (disc A) 01 mm (2)Check that the state is as shown in the figure. Holder (disc A) 123 123 20 PULLY AND DISC CENTER HOLE ALIGNMENT (1)Rotate the cam and adjust to the position shown in the figure. (2)Check that the state is as shown in the figure. Note:The disc should not be fixed. Disc 0.52m

45、m Base unit Disc pulley Disc hole Holer (disc A) Fixed screw Bracket (BU adjustment) AB (3)Remove the Magnet assembly. Cam Base unit Bracket (BU adjustment) Magnet assembly Cam Magnet assembly Tapering screwdriver Loosen the fixed screw by 60 to 90, and move and adjust the bracket (BU adjustment) up and down using a tapering screwdriver so that the positions of the disc hole and disc pulley become A=B or between A:B=2:1 and 1:2. 21 MAGNET ASSY ALIGNMENT Cam (1)Rotate the cam and ad