sony_MZ-R90_service_manual 维修电路图.pdf

《sony_MZ-R90_service_manual 维修电路图.pdf》由会员分享，可在线阅读，更多相关《sony_MZ-R90_service_manual 维修电路图.pdf（50页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL PORTABLE MINIDISC RECORDER US Model Canadian Model Australian Model Chinese Model MZ-R90 AEP Model UK Model E Model Tourist Model MZ-R90/R91 SPECIFICATIONS MZ-R90/R91 US and foreign patents licensed from Dolby Laboratories Licensing Corporation. Photo: MZ-R91 (Blue type) System Audio

2、playing system MiniDisc digital audio system Laser diode properties Material: GaAlAs Wavelength: = 790 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 the optical pick-up block with 7 mm aperture.) Re

3、cording and playback time Maximum 80 minutes (MDW-80, stereo recording) Maximum 160 minutes (MDW-80, monaural recording) 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 Re

4、ed Solomon Code (ACIRC) Sampling frequency 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

5、3 dB Wow and Flutter Below measurable limit Inputs Microphone: stereo mini-jack, 0.351.38 mV Line in: stereo mini-jack, 69194 mV Optical (Digital) in: optical (digital) mini-jack Outputs i/LINE OUT*: stereo mini-jack Headphones: maximum output level 5 mV + 5 mV, load impedance 16 ohm LINE OUT: 194 m

6、V, load impedance 10 kilohm * The i/LINE OUT jack connects either headphones or a line cable. General Power requirements Sony AC Power Adaptor (supplied) connected at the DC IN 3 V jack: 220230 V AC, 50/60 Hz (European model) 120 V AC, 50 Hz (Canadian model) 100240 V AC, 50/60 Hz (Other models) Nick

7、el metal hydride rechargeable battery NH- 14WM (supplied) LR6 (size AA) alkaline battery (not supplied) Battery operation time Dimensions MZ-R90 Approx. 78.9 17.3 72.0 mm (w/h/d) (31/811/16 27/8in.) MZ-R91 Approx. 78.9 18.0 72.0 mm (w/h/d) (31/823/32 27/8in.) Mass MZ-R90 Approx. 105 g (3.7 oz) the r

8、ecorder only Approx. 148 g (5.2 oz) incl. a recordable MD, and NH-14WM nickel metal hydride rechargeable battery MZ-R91 Approx. 110 g (3.8 oz) the recorder only Approx. 153 g (5.4 oz) incl. a recordable MD, and NH-14WM nickel metal hydride rechargeable battery Supplied accessories AC power adaptor (

9、1) Headphones with a remote control (1) (RM-MZ2S) NH-14WM nickel metal hydride rechargeable battery (1) Dry battery case (1) Rechargeable battery carrying case (1) Carrying pouch (1) A Design and specifications are subject to change without notice. C plug adaptor (1) Battery life1) BatteriesRecordin

10、g 2) Playback NH-14WM nickel metal hydride rechargeable battery Approx. 6.5 hours Approx. 12 hours LR6 (SG) (size AA) Sony alkaline dry battery Approx. 4 hours Approx. 16.5 hours NH-14WM nickel metal hydride rechargeable battery + One LR6 (SG)(size AA) Approx. 14.5 hours Approx. 29 hour 1)The batter

11、y life may be shorter due to operating conditions and the temperature of the location. 2)When you record, use a fully charged rechargeable battery. Model Name Using Similar MechanismNEW Mechanism TypeMT-MZR90-165 Optical Pick-up NameLCX-2R Ver 1.3 2000. 07 With SUPPLIMENT-1 (9-927-187-83) 收音机爱好者资料库

12、Ra d i o Fa n s .CN 2 TABLE OF CONTENTS 1.SERVICING NOTES.3 2.GENERAL.4 3.DISASSEMBLY.5 4.TEST MODE. 11 5.ELECTRICAL ADJUSTMENTS. 18 6.DIAGRAMS 6-1.Block Diagram SERVO Section . 23 6-2.Block Diagram A/D, D/A CONVERTER, AUDIO Section . 25 6-3.Block Diagram KEY CONTROL/DISPLAY/ POWER SUPPLY Section .

13、27 6-4.Printed Wiring Board . 30 6-5.Schematic Diagram . 33 6-6.IC Pin Function Description . 46 7.EXPLODED VIEWS. 53 8.ELECTRICAL PARTS LIST. 57 Flexible Circuit Board Repairing Keep the temperature of the soldering iron around 270 C dur- ing repairing. Do not touch the soldering iron on the same c

14、onductor 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 of a tantalum capacitor may be dam- aged by heat. CAUTION Use of con

15、trols or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCUR

16、IT DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST AR

17、E CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. 收音机爱好者资料库 Ra d i o Fa n s .CN 3 NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may su

18、ffer electro- static break-down because of the potential difference generated 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 f

19、lexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-2R) The laser d

20、iode in the optical pick-up block may suffer electro- static break-down easily. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform mea- sures against electrostatic break-down sufficiently before the op- eration. The flexible board is easily damaged and sh

21、ould be handled with care. laser-tap OPTICAL PICK-UP FLEXIBLE BOARD SECTION 1 SERVICING NOTES 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 fas- tening the

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

23、EEPROM. (Refer to Section 5 Electrical Adjustment. (page 18) Replacement of CXD2660GA (IC502) and CXR701080-013GA (IC801) used in this set requires a special tool. Therefore, they cannot be replaced. tape S801 MAIN board upper panel assy 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SECTION 2 GENERAL LOCATION OF

24、CONTROLS The recorder 1 2 3 5 4 6 7 8 9 qd 0 qa qs qf qg ql qh qj qk 1 9 2 3 4 5 6 7 8 0 1 3 2 6 7 0 8 9 qa qs qd qf 5 4 1x (stop) /CHARGE button 2Display window 3REC indicator 4DC IN 3V jack 5Jog lever 6i/LINE OUT (headphones/line out) jack 7MIC (PLUG IN POWER) jack 8LINE IN (OPTICAL) jack 9HOLD sw

25、itch Slide to lock the controls of the recorder. 0N (play) button qaX (pause) button qsT MARK (track mark) button qdREC (record) switch qfBattery compartment qgVOL (volume) +/ buttons qhOPEN switch qjEND SEARCH button qk./ (search/AMS) buttons qlSYNCHRO REC (synchro-recording) ON/OFF switch 1Charact

26、er information display Displays the disc and track name*, date, error messages, track numbers, etc. * Disc and track names appear only with MDs that have been electronically labeled. 2MONO(monaural) indication 3Disc name/track name indications Appears when labeling disc or track respectively. 4Play

27、mode indication Shows the play mode of the MD. F (all repeat): All tracks play repeatedly. F 1(single repeat): One track plays repeatedly. F SHUF(shuffle repeat): Tracks will be repeated in random order. 5SYNC (synchro-recording) indication Lights up while synchro-recording. 6Disc indication Shows t

28、hat the disc is rotating for recording, playing or editing an MD. 7REC indication Lights up while recording. Flashes when standing by for recording. The headphones with a remote control (RM-MZ2S) 8Mega bass indication 9Battery indication Shows approximate battery condition. While charging the rechar

29、geable battery, this indication shows the charging condition. 0REMAIN (remaining time/tracks) indication Lights up along with the remaining time of the track, remaining time of the MD, or remaining number of tracks. qaREC DATE (recorded/current date) indication Lights up along with the date and time

30、 the MD was recorded. When only “DATE” lights up, the current date and time are displayed. qsTime display Shows the elapsed time of the track being recorded or played. qdLevel meter Shows the level of the MD being played or recorded. qfAM/PM indication Lights up along with the time indication in the

31、 12-hour system. 1Headphones Can be replaced with optional headphones. 2Stereo mini plug 3x (stop) button 4Control To play, press the control towards N during stop. Press the control towards N during play to search the beginning of the succeeding track; hold in this position to fast-forward. Press t

32、owards . during play to search the beginning of the preceeding track; hold in this position to rewind. 5HOLD switch Slide to lock the controls of the remote control. 6X (pause) button 7PLAY MODE button 8DISPLAY button 9VOL (volume) +/ buttons When the AVLS is set to on, you cannot increase the volum

33、e to the maximum. To increase the volume above the limited level, set the AVLS to off using the jog lever. 0Display window The display window of the recorder This section is extracted from instruction manual. 5 PANEL ASSY, BOTTOM Note: Follow the disassembly procedure in the numerical order given. S

34、ECTION 3 DISASSEMBLY This set can be disassembled in the order shown below. Upper Panel Section Main Board, “Case Assy, Battery” LCD Module, “Button, Control”, “Service Assy, Upper Panel” (R90/R91) Main Board, “Case Assy, Battery” “Chassis Assy, Set”, MD Mechanism Deck (MT-MZR90-165) Panel Assy, Bot

35、tomSet Belt Assy, Ornamental Service Assy, OP Motor Flexible Board Motor, DC (Sled) (M602) “Motor, DC SSM-01C14A (Spindle) (M601)”, “Motor, DC (Over Write Head Up/Down) (M603)” Holder Assy 4 two screws (1.4) 1 flexible board (CN801) 5 upper panel section 4 two screws (1.4) 2 knob (open) 3 UPPER PANE

36、L SECTION Note: On installation of bottom panel assy, adjust the posi- tion of both two switches (S804, S807) and two knobs (hold). S807 S804 4 Close the battery terminal (plus). 5 two screws (1.4) 1 Open the battery case lid. 3 battery case lid 6 Remove the bottom panel assy in the direction of arr

37、ow A. A 5 two screws (1.4) knob (hold) 5 screw (1.4) 2 two claws 6 MZ-R91 1 five screws (1.4) 2 LCD module 3 control button 4 upper panel service assy 1 five tapping screws (1.7) 2 LCD module 5 upper panel service assy 3 control button 4 adhesive sheet (control button) Note: The control buttons are

38、stuck with strong adhesive sheets. As the control buttons are very fragile, do not peel them off forcibly. Note: Also replace the adhesive sheets (control button), when replacing the control buttons and upper panel service assy. LCD MODULE, “BUTTON, CONTROL”, “SERVICE ASSY, UPPER PANEL” MZ-R90 7 ) )

39、 ) ) 6 Remove the ornamental belt assy in the direction of arrow C. 2 Open toward the direction B to disengage two bosses and convex portions pointed with *. 1 Pull toward the direction A to disengage two bosses . Note: As the ornamental belt assy is very fragile, do not give an excessive force to t

40、he entire assy when removing it. C B A A B 3 three bosses 4 knob (open) 2 Open toward the direction B to disengage two bosses and convex portions pointed with *. boss boss boss boss 5 two bosses BELT ASSY, ORNAMENTAL MAIN BOARD, “CASE ASSY, BATTERY” 3 four toothed lock screws (M1.4) 2 flexible board

41、 (over write head) (CN601) 2 flexible board (LCD module) (CN801) Note: Before removing the flexible board from CN501, be sure to solder the flexible board. (Refer to servicing notes (NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-2R) page 3.) 1 Remove the solder of battery terminal (minus). 1 Remo

42、ve the solder of joint. 8 batter case assy 7 four bosses 2 motor flexible board (CN602) 5 flexible board (optical pick-up) (CN501) 1 Remove the solder of battery terminal (plus). 6 main board 4 8 2 boss 3 MD mechanism deck (MT-MZR90-165) 2 boss 4 tension spring (arm) 5 set chassis assy 1 screw (1.4)

43、 1 screw (1.4) 8 bearing 5 screw 4 rack spring 3 precision pan screw (M1.4) 1 washer (0.8 - 2.5) 2 gear (SA) 5 screw 7 Pull off the lead screw. 6 B A 9 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, w

44、hen opening the over write head. over write head section “CHASSIS ASSY, SET”, MD MECHANISM DECK (MT-MZR90-165) SERVICE ASSY, OP 9 1 Remove two solders of DC motor (over write head up/down) (M603). 1 Remove four solders of DC motor (sled) (M602). 1 Remove four solders of DC motor (spindle) (M601). DC

45、 motor (sled) circular hole 3 motor flexible board 2 adhesive sheet Note: Align a circular hole in the stripping paper with a circular hole in the DC motor (sled), when mounting the motor flexible board. 5 Remove the holder assy in the direction of arrow C. 1 Open the holder assy. A B 3 C 2 Push the

46、 convex portion toward the direction B and open the holder assy toward the direction A to erect uprightly. 4 boss HOLDER ASSY MOTOR FLEXIBLE BOARD 10 4 two precision pan screws (M1.4) 5 DC motor (sled) (M602) 1 Remove four solders of motor flexible board. 2 washer (0.8 - 2.5) 3 gear (SA) 1 Remove si

47、x solders of motor flexible board. 4 three precision pan screws (M1.4) qa DC motor (over write head up/down) (M603) 6 two precision pan screws (M1.4) qs gear chassis assy 9 screw (M1.2 1.5) 0 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. MOTOR, DC (SLED) (M602) “MOTOR