sony_MZ-R37_1.3_service_manual 维修电路图.pdf

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1、 1 MICROFILM MZ-R37 SERVICE MANUAL PORTABLE MINIDISC RECORDER SPECIFICATIONS US Model Canadian Model AEP Model UK Model E Model Australian Model Tourist Model Model Name Using Similar MechanismMZ-R55 MiniDisc Mechanism TypeMT-MZR37-161 Optical Pick-up TypeKMS-280A US and foreign patents licensed fro

2、m Dolby Laboratories Licensing Corporation. System Audio playing system MiniDisc digital audio system Laser diode properties Material: GaAlAs Wavelength: = 780 nm Emission duration: continuous Laser output: less than 44.6 W (This output is the value measured at a distance of 200 mm from the lens sur

3、face on the optical pick-up block with 7 mm aperture.) Recording and playback time Maximum 74 minutes (MDW-74, stereo recording) Maximum 148 minutes (MDW-74, monaural recording) Revolutions 400 rpm to 900 rpm (CLV) Error correction Advanced Cross Interleave Reed Solomon Code (ACIRC) Sampling frequen

4、cy 44.1 kHz Sampling rate converter Input: 32 kHz / 44.1 kHz / 48 kHz Coding Adaptive TRansform Acoustic Coding (ATRAC) Modulation system EFM (Eight to Fourteen Modulation) Number of channels 2 stereo channels 1 monaural channel Frequency response 20 to 20,000 Hz 3 dB Wow and Flutter Below measurabl

5、e limit Inputs MIC (PLUG IN POWER): stereo mini-jack, 0.351.38 mV (OPTICAL) LINE IN: stereo mini-jack with optical (digital) in Line in: 69194 mV Optical (digital) in: wave length 660 nm Outputs PHONES/REMOTE: stereo mini-jack, maximum output level 5 mW + 5 mW, load impedance 16 ohm LINE OUT: stereo

6、 mini-jack, 194 mV, load impedance 10 kilohm or greater General Power requirements Sony AC Power Adaptor (supplied) connected at the DC IN 4.5 V jack: 120 V AC, 60 Hz (US, Canadian model) 220230 V AC, 50/60 Hz (AEP model) 230240 V AC, 50 Hz (UK model) 240 V AC, 50 Hz (Australian and New Zealand mode

7、l) Two nickel-cadmium rechargeable batteries NC-AA (supplied) Two LR6 (size AA) alkaline batteries (not supplied) Continued on next page Ver 1.3 1999. 11 With SUPPLEMENT-1 (9-926-952-81) With SUPPLEMENT-2 (9-926-952-82) 收音机爱好者资料库 Ra d i o Fa n s .CN 2 Battery operation time1) BatteriesRecording2)Pla

8、yback Two NC-AAApprox.Approx. nickel-cadmium3 hours5 hours rechargeable batteries Two LR6 (size AA)3)Approx. Sony alkaline dry batteries13 hours 1)The battery life may be shorter due to operating conditions and the temperature of the location. 2)When you record, use fully charged rechargeable batter

9、ies. 3)Recording time may differ according to the alkaline batteries. Dimensions Approx. 116.8 18.5 86.1 mm (w/h/d) (4 5/8 3/4 3 1/2 in.) Mass Approx. 160 g (5.6 oz) the recorder only Approx. 220 g (7.8 oz) incl. a recordable MD, and two NC-AA nickel-cadmium rechargeable batteries Supplied accessori

10、es Optical cable (1) (MC-918) AC power adaptor (1) (AC-MZR37) Headphones with a remote control (1) (SZR-S17) NC-AA nickel-cadmium rechargeable batteries (2) Rechargeable battery carrying case (1) Design and specifications are subject to change without notice. SAFETY-RELATED COMPONENT WARNING! COMPON

11、ENTS 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. Flexible Circuit Board Repairing Keep t

12、he temperature of the 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. Notes on chip component replacement Never reuse a disconnected

13、 chip component. Notice that the minus side of a tantalum capacitor may be damaged by heat. Precautions for Laser Diode Emission Check When checking the emission of the laser diode during adjust- ments, never view directly downwards as this may lead to blindness. Precautions for Using Optical Pick-u

14、p (KMS-280A) As the laser diode inside the optical pick-up damages by static electricity easily, solder the laser tap of the Optical pick-up flexible board when handling. Also take the necessary measures to prevent damages by static electricity. Handle the Optical pick- up flexible board with care a

15、s it breaks easily. Laser tap Optical Pick-up flexible board 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 S

16、ONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY DIRECT, INCIDENTAL OR CON

17、SEQUENTIAL DAMAGES OF ANY NATURE, OR LOSSES OR EXPENSES RESULTING FROM ANY DEFECTIVE PRODUCT OR THE USE OF ANY PRODUCT. “MD WALKMAN” is a trademark of Sony Corporation. This MiniDisc player is classi- fied as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior.

18、 收音机爱好者资料库 Ra d i o Fa n s .CN 3 1.GENERAL Looking at the controls . 4 2.SELF-DIAGNOSTIC 2-1. General. 5 2-2. Test Mode Setting . 5 2-3. Operation in Test Mode Setting . 5 2-4. Releasing the Test Mode . 5 2-5. Self-Diagnostic Mode . 5 2-6. Clearing the Error Indication Code and Total Recording Time.

19、 6 3.DISASSEMBLY 3-1. Panel, Bottom. 7 3-2. Panel (SV) Assy, Front. 7 3-3. LCD Module . 8 3-4. Connector. 8 3-5. Main Board . 9 3-6. Panel (SV) Assy, Upper . 9 3-7. Cabinet (SV) Assy . 10 3-8. OP Block Assy . 10 3-9. Holder Assy. 11 TABLE OF CONTENTS 4.TEST MODE 4-1. General. 12 4-2. Test Mode Setti

20、ng . 12 4-3. Test Mode Structure . 12 4-4. Manual Mode . 12 4-5. Overall Adjustment Mode (Assy Mode). 15 4-6. Hybrid Mode, Key Check Mode. 16 5.ELECTRICAL ADJUSTMENTS. 17 6.DIAGRAMS 6-1. IC Pin Descriptions . 20 6-2. Block Diagram Servo Section . 25 6-3. Block Diagram Audio Section . 27 6-4. Block D

21、iagram System Control Section . 29 6-5. Printed Wiring Board . 31 6-6. Schematic Diagram Main Section (1/3) . 35 6-7. Schematic Diagram Main Section (2/3) . 38 6-8. Schematic Diagram Main Section (3/3) . 41 7.EXPLODED VIEWS 7-1. Panel Section. 49 7-2. Cabinet (SV) Assy Section . 50 7-3. Mechanism De

22、ck Section . 51 8.ELECTRICAL PARTS LIST. 52 SERVICING NOTE 1) When repairing this device with the power on, if you remove the main board or open the upper panel assy, this device stops working. In this case, you can work without the device stopping by fastening the hook of the OPEN1 switch (S801) wi

23、th tape. 2) This set is designed to perform automatic adjustment for each adjustment and write its value to EEPROM. Therefore, when EEPROM (IC803) has been replaced in service, be sure to per- form automatic adjustment and write resultant values to the new EEPROM. Refer to page 12 for details. panel

24、 assy, upper MAIN board tape S801 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SECTION 1 GENERAL This section is extracted from instruction manual. 5 SECTION 2 SELF-DIAGNOSTIC 2-1. GENERAL This set uses the self-diagnostic system in which if an error occurs in playback/recording mode, the error is detected by th

25、e model control and power control blocks of the microprocessor and infor- mation on the cause is stored as history in EEPROM. By viewing this history in test mode, it helps you to analyze a fault and determine its location. 2-2. TEST MODE SETTING There are two different methods to set the test mode:

26、 1 Short BP801 (TEST) on the main board with a solder bridge (connect pin of IC801 to the ground). Then, turn on the power. 2 In the normal mode, use the keys on the unit to perform the following operations: Press and hold down ( and press the keys below in this turn: + n + n =n = n + n = n + n = n

27、P n P 2-3. OPERATION IN TEST MODE SETTING When the test mode is set, the LCD shows repeated cycles of the following display: 1) Unit LCD 2) Remote controller LCD Holding down P allows the current display to be maintained while it being depressed. 2-4. RELEASING THE TEST MODE For test mode set with t

28、he method 1: Turn off the power and open the solder bridge on BP801 on the main board. For test mode set with the method 2: Turn off the power. 2-5. SELF-DIAGNOSTIC MODE 1. Go into the test mode. 2. With the unit LCD indicators all flashing, press DISPLAY key to go into the self-diagnostic mode. 3.

29、Then, each time ) key is pressed, the reference information display changes as given below. Press = key to go back to the previous display. C401 X801 26 25 IC801 IC301 BP801 (TEST) MAIN BOARD (SIDE B) All ON All OFF Microprocessor version display Vr. 1.00 188:88 pppppp 1st XX 1st 1 1st 2 1st XX N XX

30、 N 1 N 2 N-1 XX N-1 1 N-1 2 N-2 XX N-2 1 N-2 2 R XXXX (return) 888 Vr. 1. All ON All OFF Microprocessor version display Error indication code History code 1st0 00 6 Description of History Codes History code numberDescription 1st0The first error 1st1 1st2 00 indicated N0The last error N1 N2 00 indica

31、ted N-10One error before the last. N-11 N-12 00 indicated N-20Two errors before the last. N-21 N-22 00 indicated RTotal recording time *1) *1) Total recording time Total recording time is recorded in minutes as an index for load to the OP. It is recorded in hexadecimal format and up to 65,535 min. (

32、about 886 discs of 74-minute disc) can be counted. It returns to “0000h” when recorder goes beyond this limit. Example :REC 000A n Approx. 10 min. REC 00A0 n Approx. 160 min. REC 0A00 n Approx. 2,560 min. Description of Error Indication Codes ProblemIndication codeMeaning of codeDescription No error

33、00 Abnormal stop during recording Abnormal disc RPM. 01Servo errorFocus out of alignment. Attempt to access an abnormal address. 02ADIP read errorUnable to read the ADIP address. 03Shock detected during writeJumped by 1.5 tracks or more due to shock during write. Shock detected during 04 laser down

34、Shock detected when laser was moving down. Abnormal stop during playback 11No focus appliedFocus could not be applied. 12CRC errorUnable to read the address. 15FG errorAbnormal rotation of disc. Abnormal stop of recording/playback caused by power system 21Lower voltage due to overloadPower voltage r

35、educed due to overload. 22Momentary interruptionMomentary interruption detected. 23 Lower power voltage in motorPower voltage for motor continuously reduced to less than system1V. 24Low power voltage in DSP 2-6. CLEARING THE ERROR INDICATION CODE AND TOTAL RECORDING TIME After repair, reset the erro

36、r indication code. Reset the total recording time when you have replaced the OP. 1. Go into the self-diagnostic mode. (See page 5.) 2. To reset the error indication code, slide REC c key when the code is displayed. (All data including 1st, N , N-1 and N-2 are reset.) 3. To reset the total recording

37、time, slide REC c key when the time is displayed. 7 Note : This set can be disassemble according to the following sequence. SECTION 3 DISASSEMBLY 3-1. PANEL, BOTTOM 3-2. PANEL (SV) ASSY, FRONT Note : Follow the disassembly procedure in the numerical order given. SetPanel, Bottom Panel (SV) Assy, Fro

38、nt Panel (SV) Assy, Upper LCD Module ConnectorMain Board Cabinet (SV) Assy OP Block Assy Holder Assy 1 1.7x4.5, tapping 2 1.7x4.5, tapping 3 panel, bottom knob switch 1 knob (OPEN) 2 claw 5 panel (SV) assy, front 3 claw 4 claws claws knob switch 8 3-3. LCD MODULE 3-4. CONNECTOR 5 LCD module 1 CN801

39、2 4 3 1 CN601 2 CN702 3 CN701 9 3-5. MAIN BOARD 3-6. PANEL (SV) ASSY, UPPER 1 1.7x4.5, tapping claws 2 1.7x4.5, tapping 3 4 MAIN board 4 claw 3 bearing (stopper) 1 M1.4, precision 8 panel (SV) assy, upper 6 boss 5 claw 2 7 10 3-7. CABINET (SV) ASSY 3-8. OP BLOCK ASSY 1 MD, step 2 MD, step4 cabinet (

40、SV) assy 3 mechanism block assy 1 M1.4x3.0 locking 3 shaft, main 4 flexible board adhesive sheet OP block assy 2 M1.4x3.0 11 3-9. HOLDER ASSY Location of the Flexible Board Be careful to avoid contact of the lens with the chassis when installing the OP block assy. Align this portion of the flexible

41、board with the marked line on the holder. marked line 1 claw 4 holder assy 2 3 Notes for Installation of the OP Block Assy 12 SECTION 4 TEST MODE 4-1. GENERAL This set provides the Overall adjustment mode (Assy mode) that allows CD and MO disk to be automatically adjusted when in the test mode. In t

42、his Assy mode, the system discriminates between CD and MO disk and then automatically perform adjustments for them in sequence. If a fault is found, the system displays its loca- tion. Also, the Servo mode allows each individual adjustment to be automatically adjusted. 4-2. TEST MODE SETTING See pag

43、e 5. 4-3. TEST MODE STRUCTURE Test mode 4-4. MANUAL MODE (1) Servo Mode How to Transfer in the Servo Mode: Mode No.Test DescriptionCheckWrite 000Servo mode 010Offset correction value indication 011VC offset correction 012Focus bias correction 013FE offset correction 014ABCD offset correction 015All servo ON 016Temperature indication 020Laser power adjustment 021Laser CD/MO read adjustment (08) 022Laser MO write adjustment (4C) 023Sled normal (45) 024Sled intermittent (65) 025Sled access (30) 030MO test adjust