Sony MZ-R70 Digital Recorder Service Manual 电路图.pdf

《Sony MZ-R70 Digital Recorder Service Manual 电路图.pdf》由会员分享，可在线阅读，更多相关《Sony MZ-R70 Digital Recorder Service Manual 电路图.pdf（51页珍藏版）》请在收音机爱好者资料库上搜索。

1、 1 MZ-R70 SERVICE MANUAL PORTABLE MINIDISC RECORDER Model Name Using Similar MechanismMZ-R90/R91 Mechanism TypeMT-MZR70-165 Optical Pick-up NameLCX-2R (Photo: Silver) System Audio playing system MiniDisc digital audio system Laser diode properties Material: GaAlAs Wavelength: = 790 nm Emission durat

2、ion: 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 the optical pick-up block with 7 mm aperture.) Recording and playback time Maximum 80 minutes (MDW-80, stereo recording) Maximum 160 minutes (MDW-80, monaural recording)

3、 Maximum 74 minutes (MDW-74, stereo recording) Maximum 148 minutes (MDW-74, monaural recording) Revolutions 400 rpm to 1,800 rpm (CLV) Error correction Advanced Cross Interleave Reed Solomon Code (ACIRC) Sampling frequency 44.1 kHz Sampling rate converter Input: 32 kHz/44.1 kHz/48 kHz Coding Adaptiv

4、e TRansform Acoustic Coding (ATRAC) Modulation system EFM (Eight to Fourteen Modulation) Number of channels 2 stereo channels 1 monaural channel SPECIFICATIONS Frequency response 20 to 20,000 Hz 3 dB Wow and Flutter Below measurable limit Inputs Microphone: stereo mini-jack, 0.351.38 mV Line in: ste

5、reo mini-jack, 69194 mV Optical (Digital) in: optical (digital) mini- jack Outputs i1: stereo mini-jack, maximum output level 5 mW + 5 mW, load impedance 16 ohm i2: stereo mini-jack, maximum output level 5 mW + 5 mW, load impedance 16 ohm General Power requirements Sony AC Power Adaptor (supplied) c

6、onnected at the DC IN 3 V jack: 120 V AC, 60 Hz (US model) 230-240 V AC, 50/60 Hz (UK and Hong Kong model) 240 V AC, 50/60 Hz (Australia and New Zealand model) 220-230 V AC, 50/60 Hz (European model) 220 V AC, 50 Hz (China model) 220 V AC, 50 Hz (Argentina model) 100-240 V AC, 50/60 Hz (Other models

7、) Nickel cadmium rechargeable battery NC-WMAA (supplied) LR6 (size AA) alkaline battery (not supplied) Battery operation time Battery life1) BatteriesRecording2)Playback NC-WMAAApprox.Approx. nickel cadmium3 hours6.5 hours rechargeable battery LR6 (size AA)Approx.Approx. Sony alkaline3 hours3)17 hou

8、rs dry battery 1) The battery life may be shorter due to operating conditions and the temperature of the location. 2) When you record, use a fully charged rechargeable battery. 3) Recording time may differ according to the alkaline batteries. Continued on next page US Model Canadian Model AEP Model

9、UK Model E Model Australian Model Chinese Model Tourist Model US and foreign patents licensed from Dolby Laboratories Licensing Corporation. Ver 1.3 2001. 01 With SUPPLEMENT-1 (9-927-631-81) RadioFans.CN 收音机爱 好者资料库 2 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around

10、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 chip component. Notice that the minus side

11、of a tantalum capacitor may be damaged by heat. 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 CONSEQUENTIAL DAMAGES OF ANY NATURE, OR L

12、OSSES 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. Dimensions Approx. 81 74 26.2 mm (w/h

13、/d) (3 1/4 3 1 1/16 in.) without projections. Mass Approx. 115 g (4 oz) the recorder only Approx. 155 g (5.4 oz) incl. a recordable MD, and NC-WMAA nickel cadmium rechargeable battery Supplied accessories AC power adaptor (1) Headphones with a remote control (1) Optical cable (1) NC-WMAA nickel cadm

14、ium rechargeable battery (1) Rechargeable battery carrying case (1) Carrying pouch (1) Design and specifications are subject to change without notice. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRIT

15、ICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT

16、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. RadioFans.CN 收音机爱 好者资料库 3 1.SERVICING NOTE.4 2.GENERAL.5 Looking at the Controls .5 Recording an MD Right Away! .6 Playing

17、an MD Right Away! .7 3.DISASSEMBLY.8 3-1. Block Assy, Bottom .8 3-2. Panel Block Assy, Upper.8 3-3. LCD Module .9 3-4. Main Board .9 3-5. MD Mechanism Deck .10 3-6. Service Assy, OP .10 3-7. Holder Assy.11 3-8. Motor Flexible Board .11 3-9. Motor, DC (M602) .12 3-10. “Motor, DC (M601)”, “Motor, DC (

18、M603)” .12 4.TEST MODE.13 4-1. Outline.13 4-2. Test Mode.13 4-3. Manual Mode .14 4-4. Overall Adjustment Mode .15 4-5. Sound Skip Check Result Display Mode .16 4-6. Self-diagnosis Display Mode .17 4-7. Key Check Mode.19 TABLE OF CONTENTS 5.ELECTRICAL ADJUSTMENTS. 20 5-1. Outline.20 5-2. Precautions

19、for Adjustment .20 5-3. Adjustment Sequence. 20 5-4. NV Reset .20 5-5. Power Supply Manual Adjustment. 20 5-6. Temperature Correction.22 5-7. Overall Adjustment Mode .22 5-8. Laser Power Check .23 6.DIAGRAMS.25 6-1. Block Diagram MD Section . 25 6-2. Block Diagram Audio Section . 27 6-3. Block Diagr

20、am Power Supply Section . 29 6-4. Printed Wiring Board Main Board . 31 6-5. Schematic Diagram Main Board (1/3) . 35 6-6. Schematic Diagram Main Board (2/3) . 37 6-7. Schematic Diagram Main Board (3/3) . 39 6-8. IC Block Diagrams. 41 6-9. IC Pin Descriptions .44 7.EXPLODED VIEWS.51 7-1. Cabinet Secti

21、on .51 7-2. Mechanism Deck Section .52 8.ELECTRICAL PARTS LIST. 53 RadioFans.CN 收音机爱 好者资料库 4 SECTION 1 SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference genera

22、ted by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down 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

23、LASER DIODE EMISSION CHECK Never look into the laser diode emission from right avove when checking it for adustment. It is feared that you will lose your sight. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-2R) The laser diode in the optical pick-up block may suffer electrostatic break-down easil

24、y. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform measures against electrostatic break-down sufficiently before the operation. The flexible board is easily damaged and should be handled with care. OPTICAL PICK-UP FLEXIBLE BOARD When repairing this dev

25、ice 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 fas- tening the hook of the open/close detect switch (S801) with tape. This set is designed to perform automatic adjustment for each

26、adjustment and write its value to EEPROM. Therefore, when EEPROM (IC802) has been replaced in service, be sure to per- form automatic adjustment and write resultant values to the new EEPROM. (Refer to page 20.) Replacement of CXD2660R (IC502) and CXR701081 (IC801) used in this set requires a special

27、 tool. Therefore, they cannot be replaced. laser-tap Tape S801 MAIN board 5 SECTION 2 GENERAL This section is extracted from instruction manual. 6 7 8 Note : This set can be disassemble according to the following sequence. SECTION 3 DISASSEMBLY 3-1. BLOCK ASSY, BOTTOM 3-2. PANEL BLOCK ASSY, UPPER No

28、te : Follow the disassembly procedure in the numerical order given. SetBlock Assy, BottomPanel Block Assy, UpperLCD Module Main BoardMD Mechanism DeckService Assy, OP Motor Flexible Board Holder Assy Motor, DC (M602) “Motor, DC (M601)”, “Motor, DC (M603)” 1 CN801 2 3 4 screws (1.4) 5 screws (1.4) 6

29、panel block assy, upper Note : When installing, fit the knobs (HOLD, SYNCHRO REC) and switches (S804, S807) 1 lid, battery case lid, battery case 6 block assy, bottom block assy, bottom 3 screws (1.4) knob (HOLD) knob (SYNCHRO REC) hinge S807 S804 4 screws (1.4) 2 5 Note:When installing the bottom b

30、lock assy, install the assy with the battery case lid open. After it is installed, close the battery case lid. 9 3-3. LCD MODULE 3-4. MAIN BOARD 1 screws (1.7) 3 LCD module claws 2 4 screw (1.4) qs 5 screw (1.4) 8 screw (1.7) 6 screws (1.7) 7 stay 1 CN601 qd CN501 3 Remove the solder. qa boss qf MAI

31、N board 2 CN602 9 claws 0 claws 10 3-5. MD MECHANISM DECK (MT-MZR70-165) 3-6. SERVICE ASSY, OP 3 boss 4 boss chassis assy 5 MD mechanism deck (MT-MZR70-165) 1 screw (1.4) 2 screw (1.4) 9 bearing 5 screw 4 rack spring 3 precision pan screw (M1.4) 1 washer (0.8 - 2.5) 2 gear (SA) 6 screw 8 Pull off th

32、e lead screw. 7 B A 0 Opening the over write head toward the direction A, remove the OP Service assy toward the direction B. Note: Do not open the entire assy forcibly, when opening the over write head. over write head section 11 3-7. HOLDER ASSY 2 Remove two solders of DC motor (over write head up/

33、down) (M603). 1 Remove four solders of DC motor (sled) (M602). 3 Remove four solders of DC motor (spindle) (M601). DC motor (sled) circular hole 5 motor flexible board 4 adhesive sheet Note: Align a circular hole in the stripping paper with a circular hole in the DC motor (sled), when mounting the m

34、otor flexible board. 3-8. MOTOR FLEXIBLE BOARD 5 Remove the holder assy to direction of the arrow C. 1 Open the holder assy. A B 3 C 2 Push the convex portion toward the direction B and open the holder assy toward the direction A to erect uprightly. 4 boss 12 4 two precision pan screws (M1.4) 5 DC m

35、otor (sled) (M602) 1 Remove four solders of motor flexible board. 2 washer (0.8 - 2.5) 3 gear (SA) 1 Remove six solders of motor flexible board. 4 three precision pan screws (M1.4) qs DC motor (over write head up/down) (M603) 6 two precision pan screws (M1.4) qa gear chassis assy 0 screw (M1.2 1.5)

36、9 gear (HA) 8 gear (HB) 7 washer (0.8 - 2.5) 2 washer (0.8 - 2.5) 3 gear (HC) 5 DC motor (spindle) (M601) DC motor (over write head up/down) (M603) gear chassis assy gear (HA) 2.65 mm Note: Press-fit the gear (HA) up to the position of the DC motor (over write head up/down) (M603) as shown below. 3-

37、9. MOTOR, DC (M602) 3-10. “MOTOR, DC (M601)”, “MOTOR, DC (M603)” 13 IC502 FB501 C530 25 26 28 32 36 147 118 116 119 120 117 114113112 115 110109111 104108106 104105103 101102100 14414637 46 47 50 53 56 59 64 68 42 45 48 51 55 57 60 63 66 67 145 88 88 87 86 83 81 78 74 72 69 64 63 60 58 90 89 85 84 8

38、0 77 75 71 68 65 62 59 57 93 92 91 96 95 94 99 98 97 82 79 76 73 70 67 66 61 55 56 52 53 54 49 50 51 46 47 48 43 45 44 40 41 42 37 36 39 34 35 36 32 33 26 28 31 25 29 30 19 22 27 21 23 20 24 10 13 16 11 14 17 12 15 18 74 268 1359 85 82 78 76 73 89 86 83 80 90 87 84 81 77 74 72 79 75 43 44 49 52 54 5

39、8 61 62 65 69 70 71 38 40 39 41 AP508 AP504 AP505 R530 R529 C529 S804 HOLD AP1001 L502 FB503FB502 FB504 BP801 AP519 AP830 AP521 OFF ON R506 R503 R508 R509 R510 C537 R935 AP5209 AP806 C801 AP911 AP807 AP907 AP834 AP517 X801 AP511 AP516 12 09 AP506 10 32 AP804 AP803 AP507 805 IC802 IC801 81 54 MAIN BO

40、ARD (SIDE B) BP801 SECTION 4 TEST MODE 4-1. OUTLINE This set provides the Overall adjustment mode (Assy mode) that allows CD and MO disc to be automatically adjusted when in the test mode. In this overall adjustment mode, the protect switch is detected to judge the disc, CD or MO, and each adjustmen

41、t is automatically executed in order. If a fault is found, the system displays its location. Also, the manual mode allows each indi- vidual adjustment to be automatically adjusted. The keys in the description refer to the keys on both set and remote commander unless otherwise specified. Though LCD display shows the LCD of the remote commander, same con- tents are also displayed on the LCD of the set. 4-2. TEST