sony_MDS-B6P_service_manual 维修电路图.pdf

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1、 1 US Model Canadian Model AEP Model UK Model SPECIFICATIONS Model Name Using Similar MechanismMDS-B5 MD Mechanism TypeMDM-2B6P Base Unit TypeMBU-2B6P Optical Pick-up TypeKMS-210A/J-N SERVICE MANUAL MDS-B6P MICROFILM MD PLAYER Continued on next page 收音机爱好者资料库 Ra d i o Fa n s .CN 2 收音机爱好者资料库 Ra d i o

2、 Fa n s .CN 3 This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. This caution label is located inside the unit. The laser component in this product is ca- pable of emitting radiation exceeding the limit for Class 1. CAUTION Use

3、 of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation 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 Ci

4、rcuit 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. ATTENTION AU COMPOSANT AYANT RAPPORT L

5、A 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-RELATE

6、D 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. SAFETY CHEC

7、K-OUT After correcting the original service problem, perform the following 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 l

8、eakage from any exposed metal part to earth Ground and from all exposed metal parts to any exposed metal part having a re- turn 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

9、 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digi- tal 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

10、” 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 passive 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 che

11、ck AC leakage. To Exposed Metal Parts on Set 0.15F1.5k AC voltmeter (0.75V) Earth Ground 收音机爱好者资料库 Ra d i o Fa n s .CN 4 TABLE OF CONTENTS 4. ELECTRICAL ADJUSTMENTS 4-1.Precautions for Checking Laser Diode Emission.34 4-2.Precautions for Use of Optical Pick-up (KMS-210A) .34 4-3.Precautions for Adju

12、stments.34 4-4.Temperature Compensation Offset Adjustment .35 4-5.Laser Power Adjustment .35 4-6.Traverse Adjustment.36 4-7.Focus Bias Adjustment .37 4-8.Error Rate Check .37 4-8-1. CD Error Rate Check.37 4-8-2. MO Error Rate Check .37 4-9.Focus Bias Check .37 4-10. Adjusting Points and Connecting P

13、oints .38 5. DIAGRAMS 5-1.Circuit Boards Location . 39 5-2.Block Diagrams Power Section . 40 BD Section . 41 Digital Section . 43 Remote Section . 45 Duplication Section. 47 5-3.Printed Wiring Board BD Section . 48 5-4.Schematic Diagram BD Section . 51 5-5.Schematic Diagram Digital Section . 55 5-6.

14、Printed Wiring Board Digital Section . 59 5-7.Printed Wiring Board ETC Section . 64 5-8.Schematic Diagram ETC Section . 65 5-9.Printed Wiring Board Audio/Power Section . 68 5-10. Schematic Diagram Audio/Power Section . 71 5-11. Printed Wiring Board Display Section . 75 5-12. Schematic Diagram Displa

15、y Section . 77 5-13. IC Pin Functions. 79 5-14. IC Block Diagrams. 87 6. EXPLODED VIEWS 6-1.Case and Front Panel Section . 98 6-2.Chassis Section . 99 6-3.Back Panel Section . 100 6-4.MD Mechanism Section (MDM-2B6P) . 101 6-5.MD Base Unit Section (MBU-2B6P). 102 7. ELECTRICAL PARTS LIST. 103 1. GENE

16、RAL 2-1.Front Panel . 5 2-2.Rear Panel. 6 3-2.Connections . 7 3-4.Setting the Analog Output Reference Levels . 8 4-1.Overview of Playback Procedures . 8 4-2.Playback Procedures. 9 4-3.Locating a Track . 10 4-4.Display Information During Playback . 11 4-5.Playing Tracks Repeatedly . 11 4-6.Program Pl

17、ay . 12 4-7.Playing Tracks in Random Order (Shuffle Play). 13 4-8.Starting Playback Instantly (Multi-Access Function) . 13 4-9.Varying the Playback Speed (Variable-Speed Playback) . 14 4-10. Error Checking . 15 5-1.Overview of Editing Functions . 15 5-2.Erasing Tracks (Erase Function) . 16 5-3.Divid

18、ing a Recorded Track (Divide Function). 17 5-4.Combining Recorded Tracks (Combine Function) . 18 5-5.Moving Recorded Tracks (Move Function) . 18 5-6.Editing Titles . 19 5-7.Marking the Cue Point . 20 5-8.Trimming . 21 6-1.The Overview of the Setup Menu . 23 6-2.Setting Up for Timer-Activated Functio

19、n. 23 6-3.Setting the Playback Resume Mode. 24 232C Interface . 24 6-5.Setting the Auto Cue Function . 25 6-6.Setting the Rehearsal Playback Function . 25 6-7.Setting the EOM Function. 26 6-8.Reading the Hours Meter . 26 6-9.Disabling the Buttons While Controlling Remotely . 27 7-1.Cleaning and Rese

20、t Switch. 27 7-2.Display Messages . 28 Menu Item List . 28 2. DISASSEMBLY 2-1.Case and Front Panel Assembly . 29 2-2.Back Panel . 29 2-3.Mechanism Deck. 30 2-4.Slider . 30 2-5.Base Unit (MBU-2BLP), Loading Motor Assembly. 31 2-6.Slider Assembly Mounting . 31 3. TEST MODE 3-1.Setting the Test Mode .

21、32 3-2.Exiting the Test Mode . 32 3-3.Basic Operations of the Test Mode . 32 3-4.Selecting the Test Mode . 32 3-4-1. Operating the Continuous Playback Mode . 32 3-4-2. Non-Volatile Memory Mode. 32 3-5.Functions of Other Buttons . 33 3-6.Test Mode Displays . 33 3-7.Meanings of Other Displays. 33 3-8.

22、Precautions for Use of Test Mode . 33 5 SECTION 1 GENERAL This section is extracted from instruction manual. 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. 2-1. CASE AND FRONT PANEL ASSEMB

23、LY 2-2. BACK PANEL 1Two screws (+B4x8) 4Case 7Front panel assembly 5Two screws (+BVTT3x8) 6Wire (Flat type) (16 core) 2Two screws (+B4x8) 3Screw (+BVTT3x8) 6Back panel 1Four hexagon screws (M2.6) 2Three screws (+B3x5) 4Three screws (+B3x5) 5Three screws (+BVTT3x8) 3Two screws (+BVTP4x10) 30 2-3. MEC

24、HANISM DECK A B Slider 1Two screws (+B2.6x18) 2Two collars Pulley (BD) 3Rotate the pulley (BD) in the direction of arrow A, and slide the slider (M) assembly in the direction of arrow B. (As the stopper catches halfway, lightly push up the stopper in the fig. A to release, then rotate the pulley (BD

25、) in the direction of arrow A. 4Two screws (+B2.6x18) 5Two collares 6Screw (+BVTT2.6x4) 7Earth lug 8Two MD insulators 9Two compression springs 0MD insulator !Compression spring !MD insulator !Compression spring !MD mechanism deck Fig. A Bracket (BD) Lever (SLM) Torsion spring (SLM) Slider (M) assemb

26、ly 3Screw (+PTT2x4) 4Earth lug 1Disengage a torsion spring from the claw A. 2Disengage the claw B, raise the lever (SLM) upwards to remove. A Claw B Claw D C Claw 5Move the claw C on the slider up to the base rail in the direction of arrow D to remove, and remove it in the direction of arrow E. E Ba

27、se rail 2-4. SLIDER 31 2-5. BASE UNIT (MBU-2B6P), LOADING MOTOR ASSEMBLY 1Screw (+BVTP3x6) 4Belt (BD) 5Two screws (+B2.6x5) 6Connector (CN192) 7Loading motor assembly 3MD base unit (MBU-2B6P) 2-6. SLIDER ASSEMBLY MOUNTING 1Set the four left and right projections of lever to the position as in the fi

28、gure. 2Rotate fully the lever (SLM) in arrow direction A. 4Move the slider assembly in arrow direction B, and lock it to the lever (SLM). 3Rotate the pully (BD) in arrow C direction. A B C 2Two screws (+BVTP3x6) 32 3-1. Setting the Test Mode While pressing the AMS knob, turn POWER switch on, and rel

29、ease the AMS knob. 3-2. Exiting the Test Mode Turn POWER switch off. 3-3. Basic Operations of the Test Mode All operations are performed using the AMS knob, ENTER/YES button, and EDIT/NO button. The functions of these buttons are as follows. SECTION 3 TEST MODE Contents Changes parameters and modes

30、Proceeds onto the next step. Finalizes input. Returns to previous step. Stops operations. Function AMS knob ENTER/YES button EDIT/NO button 3-4. Selecting the Test Mode Twelve test modes are selected by turning the AMS knob. Display TEMP ADJUST LDPWR ADJUST EFBAL ADJUST FBIAS ADJUST FBIAS CHECK CPLA

31、Y MODE Contents Temperature compensation offset adjustment Laser power adjustment Traverse adjustment Focus bias adjustment Focus bias check Continuous playback mode Display EP MODE VERSION DISP RS232C CHECK PARA-RMT CHK HOURS MT DISP SETUP INIT Contents Non-volatile memory mode * Micro computer sof

32、t version RS232C check * Parari mode check * Hours meter operating mode Setup initialize mode For detailed description of each adjustment mode, refer to 4. Electrical Adjustments. If a different adjustment mode has been selected by mistake, press the EDIT/NO button to exit from it. * The EP MODE, RS

33、232C CHECK and PARA-RMT CHK is not used in servicing. If set accidentally, press the EDIT/NO button immediately to exit it. 3-4-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode 1 Set the disc in the unit (Whichever recordable discs or discs for playback only are ava

34、ilable.) 2 Rotate the AMS knob and display “CPLAY MODE”. 3 Press the ENTER/YES button to change the display to “CPLAYIN”. 4 When access completes, the display changes to “C1 = AD = ”. Note : The “ ” displayed are arbitrary numbers. 2. Changing the parts to be played back 1 Press the ENTER/YES button

35、 during continuous playback to change the display to “CPLY MID”, “CPLAY OUT”. When pressed another time, the parts to be played back can be changed. 2 When access completes, the display changes to “C1 = AD = ”. Note : The “ ” displayed are arbitrary numbers. 3. Ending the continuous playback mode 1

36、Press the EDIT/NO button. The display will change to “CPLY MODE”. 2 Press the EJECT button and remove the disc. Note 1 : The playback start addresses for IN, MID, and OUT are as follows. IN40h cluster MID300h cluster OUT700h cluster 3-4-2. Non-Volatile Memory Mode This mode reads and writes the cont

37、ents of the non-volatile memory. It is not used in servicing. If set accidentally, press the EDIT/NO button immediately to exit it. 33 3-5. Functions of Other Buttons Note : The erasing-protection tab is not detected during the test mode. Recording will start regardless of the position of the erasing-protection tab when the r (REC) button is pressed. Contents Sets continuous playback when pressed in th