SONY mdsr50h 维修电路图.pdf

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1、MD-SR50H/50W/60E/60W 1 CONTENTS Page SAFETY PRECAUTION FOR SERVICE MANUAL . 2 SPECIFICATIONS . 3 NAMES OF PARTS . 4 OPERATION MANUAL . 5 DISASSEMBLY. 8 REMOVING AND REINSTALLING THE MAIN PARTS. 9 ADJUSTMENT . 10 NOTES ON SCHEMATIC DIAGRAM . 23 TYPES OF TRANSISTOR AND DIODE . 23 VOLTAGE . 24 BLOCK DI

2、AGRAM . 25 SCHEMATIC DIAGRAM . 26 WIRING SIDE OF P.W.BOARD. 28 WAVEFORMS OF MD CIRCUIT . 31 TROUBLESHOOTING . 32 FUNCTION TABLE OF IC. 35 PARTS GUIDE/EXPLODED VIEW PACKING METHOD (MD-SR50H for U.K./SR60E Only) SERVICE MANUAL SHARP CORPORATION No. S2006MDSR50H/ This document has been published to be

3、used for after sales service only. The contents are subject to change without notice. MD-SR50H(BL) MD-SR50H(S) MD-SR50H(YR) MD-SR50W(BL) MD-SR50W(S) MD-SR60E(GL) MD-SR60W(S) In the interests of user-safety the set should be restored to its original condition and only parts identical to those specifi

4、ed be used. Illustration: MD-SR50H/SR50W Illustration: MD-SR60E/SR60W 收音机爱好者资料库 Ra d i o Fa n s .CN MD-SR50H/50W/60E/60W 2 Figure 2-1Figure 2-2 Precaution to be taken when replacing and servicing the Laser Pickup. The AEL (Accessible Emission Level) of Laser Power Output for this model is specified

5、to be lower than Class I Requirements. However, the following precautions must be observed during servicing to protect your eyes against exposure to the laser beam. (1) When the cabinet has been removed, the power is turned on without a compact disc, and the Pickup is on a position outer than the le

6、ad-in position, the Laser will light for several seconds to detect a disc. Do not look into the Pickup Lens. (2) The Laser Power Output of the Pickup inside the unit and replacement service parts have already been adjusted prior to shipping. (3) No adjustment to the Laser Power should be attempted w

7、hen replacing or servicing the Pickup. (4) Under no circumstances look directly into the Pickup Lens at any time. (5) CAUTION - Use of controls or adjustments, or performance of procedures other than those specified herein may result in hazardous radiation exposure. SAFETY PRECAUTION FOR SERVICE MAN

8、UAL VARO !Avattaessa ja suojalukitus ohitettaessa olet alttiina nkymttmlle lasersteilylle. l katso steeseen. VARNING!Osynlig laserstralning nr denna del r ppnad och sprren r urkopplad. Betrakta ej strlen. Precaution to be taken when replacing and servicing the laser pickup. The following precautions

9、 must be observed during servicing to protect your eyes against exposure to the laser. Warning of possible eye damage when repairing: If the AC adaptor or batteries are connected when the top houising (disc cover) of the unit is removed, and the PLAY key is pressed, the laser will light up during fo

10、cus access (2-3 seconds). (Fig. 2-1) During the operation, the laser will leak from the opening between the magnetic head and the mechanical chassis (Fig. 2-2). In order to protect your eyes, you must not look at the laser during repair. Before repairing be sure to disconnect the AC adaptor and remo

11、ve the batteries. Magnet HeadLaser Beam Optical Pick-Up Main PWB Spindle motor Mechanism Chassis Laser Diode Properties G Material: GaAlAs G Wavelength: 785 nm G Pulse time: Read mode: 0.8 mW Continuous Write mode: max 10 mW 0.5S min cycle 1.5S Repetition VAROITUS! LAITTEEN KYTTMINEN MUULLA KUIN TSS

12、 KYTTOHJEESSA MAINITULLA TAVALLA SAATTAA ALTISTAA KYTTJN TURVALLISUUSLUOKAN 1 YLITTVLLE NKYMTTMLLE LASERSTEILYLLE. VARNING - OM APPARATEN ANVNDS P ANNAT STT N I DENNA BRUKSANVISNING SPECIFICERAS. KAN ANVNDAREN UTSTTAS FR OSYNLIG LASERSTRLNING, SOM VERSKRIDER GRNSEN FR LASERKLASS 1. CAUTION Laser Dio

13、de Properties G Material: GaAIAs G Wavelength: 785 nm G Pulse time: Read mode; 0.8 mW Continuous Write mode; max. 10 mW 0.5S min. cycle 1.5S Repetition G This Portable MiniDisc Recorder is classified as a CLASS 1 LASER product. G The CLASS 1 LASER PRODUCT label is located on the bottom. GUse the Por

14、table MiniDisc Recorder only in accordance with the instructions given in this manual and do not attempt to interfere with the interlock switch or make any other adjustment as this may result in exposure to hazardous radiation.(MD-SR50H/SR60E) LASER KLASSE 1 LUOKAN 1 LASERLAITE KLASS 1 LASERAPP ARAT

15、 (MD-SR50W/SR60W) (MD-SR50H) Magnet head Optical pick-up Top Cabinet 收音机爱好者资料库 Ra d i o Fa n s .CN MD-SR50H/50W/60E/60W 3 FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL. SPECIFICATIONS Specifications for this model are subject to change without prior n

16、otice Input sensitivity: Output level:(MD-SR50H/SR50W) Output level:(MD-SR60W/SR60E) Dimensions:Width: 99.9 mm (3-15/16) Height: 22.9 mm (29/32) Depth: 77.9 mm (3-3/32) Weight:168 g (0.37 lbs.) without battery (MD-SR50H/SR50W) Weight:191 g (0.42 lbs.) with rechargeable (MD-SR60W/SR60E)battery Input

17、socket:Line/optical digital, microphone (powered by the main unit) Output socket:Earphones (impedance: 32 ohms) (MD-SR50H/SR50W) Output socket:Headphones (impedance: 16 ohms)/ (MD-SR60W/SR60E)remote control unit MiniDisc Recorder Type:Portable MiniDisc recorder Signal readout:Non-contact, 3-beam sem

18、i-conductor laser pick-up Audio channels:Stereo 2 channels/monaural (longplay mode) 1 channel Frequency response:20 - 20,000 Hz ( 3 dB) Rotation speed:Approx. 400 - 900 rpm Error correction:ACIRC (Advanced Cross Interleave Reed-Solomon Code) Coding:ATRAC (Adaptive Transform Acoustic Coding), 24-bit

19、computed type Recording method:Magnetic modulation overwrite method Sampling frequency:44.1kHz (32 kHz and 48kHz signals are converted to 44.1kHz, and then recorded) Wow and flutter:Unmeasurable (less than 0.001% W. peek) General Power source:DC 5V :AC adaptor (AC 220-230V, 50/60 Hz) (MD-SR50H)DC 1.

20、5V: Commercially available, AA (LR6) size, alkaline battery x 1 DC 1.2V: Optional rechargeable Nickel-Metal Hydride battery (AD-N70BT) x 1 DC 4.5V: Optional car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power source:DC 5V :AC adaptor (AC 110-240V, 50/60 Hz) (MD-S

21、R50W)DC 1.5V: Commercially available, AA size (LR6), alkaline battery x 1 DC 1.2V: Optional rechargeable Nickel-Metal Hydride battery (AD-N70BT) x 1 DC 4.5V: Separately available car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power source:DC 1.2V: Rechargeable Nic

22、kel-Metal Hydride (MD-SR60E)battery (AD-N70BT) x 1 DC 5V :AC adaptor (AC 230-240V, 50/60 Hz) DC 1.5V: Commercially available, AA size (LR6), alkaline battery x 1 DC 4.5V: Separately available car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power source:DC 1.2V: Rec

23、hargeable Nickel-Metal Hydride (MD-SR60W)battery (AD-N70BT) x 1 DC 5V :AC adaptor (AC 220V, 50 Hz) DC 1.5V: Commercially available, AA size (LR6), alkaline battery x 1 DC 4.5V: Separately available car adaptor, AD-CA20X (for cars with a 12-24V DC negative earth electrical system) Power consumption:7

24、W (AC adaptor) (MD-SR50H/60E) Power consumption:0.15A (AC adaptor) (MD-SR50W) Power consumption:6W, 0.06A (AC adaptor) (MD-SR60W) Output power:RMS; 20 mW (10 mW + 10 mW) (0.2 % T.H.D.) Charging time:Approx. 3.5 hours (90%) Approx. 5.5 hours (fully charged) (When using the AC adaptor included with th

25、e unit) Battery life:(MD-SR50H/SR50W) Battery life:(MD-SR60W/SR60E) The continuous recording time is for analogue input when the volume level is set to VOL 0 The continuous play time shows the value when the volume level is set to VOL 15 The above values are the standard values when the unit is char

26、g- ed and used at an ambient temperature of 20C (68F). Earphones10 mW + 10 mW32 ohms LINE250 mV (-12 dB)10 kohms Maximum output level Load impedance Specified output When using a commercially available, high capacity, AA (LR6) size, alkaline battery When using the optional rechargeable batter AD-N70

27、BT(full charged) Continuous recording Approx. 3 hours Continuous recording Approx. 4.5 hours Continuous play Approx. 7 hours Continuous play Approx. 6.5 hours MIC H0.25 mV10 kohms MIC L2.5 mV10 kohms LINE100 mV20 kohms Recording level Reference input level input impedance When using a commercially a

28、vailable, high capacity, AA size (LR6), alkaline battery When using the rechargeable batter (full charged) included with the unit Continuous recording Approx. 3 hours Continuous recording Approx. 4.5 hours Continuous play Approx. 7 hours Continuous play Approx. 6.5 hours Headphones10 mW + 10 mW16 oh

29、ms LINE250 mV (-12 dB)10 kohms Maximum output level Load impedance Specified output The operation time when using an alkaline battery may be different, depending on the type and manufacturer of the battery and on the operating temperature. 收音机爱好者资料库 Ra d i o Fa n s .CN MD-SR50H/50W/60E/60W 4 NAMES O

30、F PARTS 1.Monaural Long-Play Mode Indicator 2.Record Indicator 3.Level Meter 4. Fast Play Indicator 5. Repeat Indicator 6. TOC Indicator 7.Battery Indicator 8. Random Indicator 9.Track Number Indicator 10. Character/Time Information Indicator 11. Synchro Recording Indicator 12. Disc Mode Indicator 1

31、3. Disc Name Indicator 14. Track Name Indicator 15. Remaining Recording Time Indicator 16. Total Track Number Indicator 17. Volume Down/Cursor Button 18. Volume Up/Cursor Button 19. Record/Track Mark Button 20. Stop/Power Off/Charge Button 21. Play/Pause Button 22. Display/Character Select Button 23

32、. Edit/Auto Mark/Time Mark Button 24. Mode Button 25. Bass/Delete Button 26. Fast Reverse/Recording Level Down/ Name Select Button 27. Fast Forward/Recording Level Up/ Name Select Button 28. Enter/Fast Play/Synchro Button 29. Earphones/Line Output Socket 30. Optical/Line Input Socket 31. Microphone

33、Input Socket 32. Open Lever 33. 5V DC Input Socket 34. Battery Cover 35. Hold Switch I Remote control unit 1.Headphones Socket 2. Bass/Delete/Track Mark Button 3. Volume Down/Cursor Button 4. Volume Up/Cursor Button 5. Hold Switch 6. Play/Pause Button 7. Fast Reverse/Recording Level Down/ Name Selec

34、t Button 8. Fast Forward/Recording Level Up/ Name Select Button 9.Stop/Power Off Button I Remote control unit 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 22 17 28 182021 2327262524 19 32 29 31 30 35 33 34 9 4251 67 8 3 9 Illustration: MD-SR60E/SR60W Only MD-SR50H/50W/60E/60W 5 OPERATION MANUAL POWER SOUR

35、CE You can power this unit with an AC adaptor or a commercially available alkaline bat- tery (LR6, “AA” size). You can also power this unit with a rechargeable battery (AD-N70BT) or car adaptor (AD-CA20X) which are available separately. 2 1 4 3 5 For MD-SR50H AC 220-230V, 50/60 Hz For MD-SR50W AC 11

36、0-240V, 50/60 Hz For MD-SR60E AC 230-240V, 50/60Hz For MD-SR60W AC 220V, 50 Hz Insert securely , all the way in. To the DC IN 5V socket I Rechargeable battery power When the rechargeable battery is used for the first time or when you want to use it after a long period of disuse, be sure to charge it

37、 fully. 1Open the battery cover. G Slide the battery cover as far as it will go to the outside and then lift to open it. If the battery cover is lifted without be- ing slid all the way out, it may break. 2Insert the rechargeable battery accord- ing to the polarity marked on the bottom of the unit. 3

38、Close the battery cover. 4Plug the AC adaptor into the AC socket, and then insert the plug on the AC adap- tor lead into the DC IN 5V socket. 5Press the :OFF/CHRG ( I ) button to begin charging. G “ ” will appear, and the battery will begin charging. GAfter about 3.5 hours have passed, “ ” will go o

39、ut. This indicates that the battery charg- ing is about 90% complete. GTo charge the battery fully, continue charging for about 2 more hours. (In this case, you do not need to press the :OFF/CHRG ( I ) button. Even if the :OFF/CHRG ( I ) button is pressed, “ ” will not appear.) Notes: G After chargi

40、ng has been completed, the AC adaptor may be left connected. (For example, when charging at night.) G The battery will not be charged when the power to the main unit is turned on. GDo not force the battery cover open too far. GDo not use a rechargeable battery or an AC adaptor other than those speci

41、fied. G The charging time will vary, depending on the condition of the battery. G When the battery is charged for the first time or is charged after not being used for a long period, the operating time may be shorter than normal.The battery life will recover with normal use i.e. charg- ing and disch

42、arging. G To avoid shortening the service life of the battery only recharge the battery after it has been completely discharged. RECORDING USING THE OPTICAL DIGITAL CABLE This is the method used for recording digi- tal signals from CDs or MDs exactly as they are stored on the original. Compared to re-