sony_MZ-R55_service_manual 维修电路图.pdf

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1、 1 MICROFILM MZ-R55 SERVICE MANUAL PORTABLE MINIDISC RECORDER SPECIFICATIONS US Model Canadian Model AEP Model UK Model E Model Australian Model Tourist Model Model Name Using Similar MechanismNEW MD Mechanism TypeMT-MZR55-161 Optical Pick-up TypeKMS-280A US and foreign patents licensed from Dolby L

2、aboratories 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 surface on t

3、he 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 frequency 44.1 k

4、Hz 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 measurable limit I

5、nputs Microphone: stereo mini-jack, 0.22-0.78 mV Line in: stereo mini-jack, 69-194 mV Optical (Digital) in: optical (digital) mini-jack Outputs Headphones: stereo mini-jack, maximum output level 5 mW+ 5 mW, load impedance 16 ohm Line out: stereo mini-jack, 194 mV, load impedance 10 kilohm General Po

6、wer requirements Sony AC Power Adaptor (supplied) connected at the DC IN 3V jack: 120 V AC, 60 Hz (US model) 220-240 V AC, 50/60 Hz (Hong Kong model) 100-240 V AC, 50/60 Hz (Tourist model) Nickel metal hydride rechargeable battery NH-14WM (supplied) Two LR6 (size AA) alkaline batteries (not supplied

7、) Continued on next page Ver 1.5 2001. 01 With SUPPLEMENT-1 (9-924-964-85) 收音机爱好者资料库 Ra d i o Fa n s .CN 2 Battery operation time BatteriesRecordingPlayback NH-14WM nickelApprox.Approx. metal hydride2.5 hours4 hours rechargeable battery Two LR6 (SG)Approx.Approx. Sony alkaline dry batteries5 hours10

8、 hours NH-14WM + Two LR6 (SG) Approx.Approx. 9.5 hours16 hours Dimensions Approx. 78.9 18.9 84 mm (w/h/d) (3 1/8 3/4 3 3/8 in.) Mass Approx. 147 g (5.2 oz) the recorder only Approx. 190 g (6.7 oz) incl. a recordable MD, and NH-14WM nickel metal hydride rechargeable battery Supplied accessories AC po

9、wer adaptor AC-MZR55 (1) Headphones with a remote control MDR-A34SP (US model)/MDR-E838SP (Hong Kong, Tourist model) and RM-MZR55 (1) NH-14WM nickel metal hydride rechargeable battery (1) Dry battery case (1) Rechargeable battery carrying case (1) Carrying pouch (1) AC plug adaptor (1) (Tourist mode

10、l only) Design and specifications are subject to change without notice. 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 NUM

11、BERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. Flexible Circuit Board Repairing Keep the 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 forc

12、e on the conductor when soldering or unsoldering. 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. Precautions for Laser Diode Emission Check When checking the emission of the laser diode during

13、adjust- ments, never view directly downwards as this may lead to blindness. Precautions for Using Optical Pick-up (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 nec

14、essary measures to prevent damages by static electricity. Handle the Optical pick- up flexible board with care as 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

15、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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein

16、may result in hazardous radiation exposure. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY DIRECT, INCIDENTAL OR CONSEQUENTIAL 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 playe

17、r is classi- fied as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior. 收音机爱好者资料库 Ra d i o Fa n s .CN 3 upper panel assy MAIN board S801 tape 1.GENERAL. 4 2.SELF-DIAGNOSTIC 2-1. General . 5 2-2. Test Mode Setting. 5 2-3. Operation in Test Mode Setting. 5 2-4.

18、 Releasing the Test Mode. 5 2-5. Self-Diagnostic Mode. 5 2-6. Clearing the Error Indication Code and Total Recording Time . 6 3.DISASSEMBLY 3-1. Bottom Panel Assy . 7 3-2. Connector . 7 3-3. Upper Panel Block Assy . 8 3-4. LCD Block Assy. 8 3-5. Ornamental Belt Block Assy . 9 3-6. Main Board. 9 3-7.

19、 Chassis (Main) 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 Setting. 12 4-3. Test Mode Structure . 12 4-4. Manual Mode . 12 4-5. Overall Adjustment Mode . 15 4-6. Hybrid Mode, Key Check Mode . 16 5.ELECTRICAL ADJUSTMENTS. 17 6

20、.DIAGRAMS 6-1. IC Pin Descriptions . 21 6-2. Block Diagram Servo Section . 25 6-3. Block Diagram Audio Section . 27 6-4. Block Diagram System Control Section . 29 6-5. Printed Wiring Board (-11). 31 6-6. Printed Wiring Board (-12). 34 6-7. Printed Wiring Board (-13). 37 6-8. Schematic Diagram Main S

21、ection (1/3) . 40 6-9. Schematic Diagram Main Section (2/3) . 43 6-10. Schematic Diagram Main Section (3/3) . 46 7.EXPLODED VIEWS 7-1. Panel Section . 54 7-2. Chassis Section. 55 7-3. Mechanism Deck Section . 56 8.ELECTRICAL PARTS LIST. 57 SERVICING NOTE 1) When repairing this device with the power

22、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 DOOR OPEN switch (S801) with tape. 2) This set is designed to perform automatic adjustment for each adjustment and write its v

23、alue to EEPROM. Therefore, when EEPROM (IC801) 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. 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 SE

24、CTION 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 the model control and power control blocks of the microprocessor and infor- mation on the cause is stored as history in EEPROM. By viewing th

25、is 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: 1 Short BP801 (TEST) on the main board with a solder bridge (connect pin of IC801 to the ground). Then, turn on the power. IC802 IC503 R81

26、8 C309 IC509 BP801 main board (side B) 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 P n P 2-3. OPERATION IN TEST MODE SETTING When the test mode is set, the LCD shows re

27、peated cycles of the following display: 1) Unit LCD 188:88 Ver .8 All ON All OFF Microprocessor version display 2) Remote controller LCD 888 Ver .8 All ON All OFF Microprocessor version display Holding down P allows the current display to be maintained while it being depressed. 2-4. RELEASING THE TE

28、ST MODE For test mode set with the 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 in

29、to the self-diagnostic mode. 1st History code Error indication code 3. Then, each time ) key is pressed, the reference information display changes as given below. 1st XX 1st 1 1st 2 1st XX N XX N 1 N 2 N-1 XX N-1 1 N-1 2 N-2 XX N-2 1 N-2 2 REC XXXX (return) Press = key to go back to the previous dis

30、play. 6 Description of History Codes History code numberDescription 1st0The first error 1st1 1st2 00 indicated N0The last error N1 N2 00 indicated N-10One error before the last. N-11 N-12 00 indicated N-20Two errors before the last. N-21 N-22 00 indicated RECTotal recording time *1) *1) Total record

31、ing 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. (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

32、 n Approx. 160 min. REC 0A00 n Approx. 2560 min. Description of Error Indication Codes ProblemIndication codeMeaning of codeDescription No error00 Abnormal stop during recording Abnormal disc RPM. 01Servo errorFocus out of alignment. Attempt to access an abnormal address. 02ADIP read errorUnable to

33、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 Shock detected when laser was moving down. Abnormal stop during playback 11No focus appliedFocus could not be applied. 12CRC errorUnable to read the address

34、. 15FG errorAbnormal rotation of disc. Abnormal stop of recording/playback caused by power system 21Lower voltage due to overloadPower voltage reduced due to overload. 22Momentary interruptionMomentary interruption detected. 23 Lower power voltage in motorPower voltage for motor continuously reduced

35、 to less than system1V. 24Low power voltage in DSP 2-6. CLEARING THE ERROR INDICATION CODE AND TOTAL RECORDING TIME After repair, reset the error 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 in

36、dication 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 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. BOTTO

37、M PANEL ASSY Note) When installing, fit the each positions knobs with switches. 1 precision pan screws (M1.4) 2 precision pan screws (M1.4) 3 precision pan screw (M1.4) 4 bottom panel assy switches knobs 3-2. CONNECTOR 1 CN601 2 CN801 3 CN502 Bottom Panel assy Connector Main Board Upper Panel Block

38、assy LCD Block assy Ornametal Belt Block assy Main Board Chassis (Main) assy OP Block assy Holder assy Note : Follow the disassembly procedure in the numerical order given. 8 3-3. UPPER PANEL BLOCK ASSY 3-4. LCD BLOCK ASSY 2 precision pan screw (M1.4) 3 precision pan screws (M1.4) 4 step screw (clic

39、k arm) 0 click arm assy 7 upper panel block assy 9 6 5 1 8 1 precision pan screw (M1.4) 2 tapping screws (1.7) 3 claws 4 LCD block assy 9 3-5. ORNAMENTAL BELT BLOCK ASSY 3-6. MAIN BOARD 5 ornamental belt block assy 6 button (OPEN) 1 2 3 4 1 precision pan screw (M1.4) 2 step screw (HP) 3 toothed lock

40、 screw (M1.4) 4 toothed lock screws (M1.4) 7 CN501 8 MAIN board 6 5 10 3-7. CHASSIS (MAIN) ASSY 3-8. OP BLOCK ASSY 1 step screw (MD) 2 step screw (MD) 4 chassis (MAIN) assy 3 1 M1.4x3.0 over head block assy lens 2 main shaft 4 OP block assy 3 flexible board 11 3-9. HOLDER ASSY 1 claw 4 holder assy 2

41、 3 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 this Assy mode, the system discriminates between CD and MO disk and then automatically perform adjustments for them in se

42、quence. 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 page 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

43、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 adjus

44、tment (4C) 023Sled normal (45) 024Sled intermittent (65) 025Sled access (30) 030MO test adjustment 031MO focus search adjustment 032MO read FE balance adjustment (0F) 033MO read ABCD level (07) 034MO write FE balance adjustment (10) 035MO write ABCD level (18) 036Laser MO read adjustment (08) 037MO focus gain (30) 038MO tracking gain (30) 039MO focus bias (06) 040Low reflection CD test adjustment 041Low r