sony_MZ-E90_service_manual 维修电路图.pdf

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1、 1 MICROFILM MZ-E90 SERVICE MANUAL PORTABLE MINIDISC PLAYER SPECIFICATIONS US Model AEP Model UK Model E Model Australian Model Tourist Model System Audio playing system MiniDisc digital audio system Laser diode properties Material: GaAlAs Wavelength: = 790 nm Emission duration: continuous Laser out

2、put: less than 44.6 W (This output is the value measured at a distance of 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.) Revolutions 600 rpm to 2250 rpm Error correction Advanced Cross Interleave Reed Solomon Code (ACIRC) Sampling frequency 44.1 kHz Coding A

3、daptive 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 Outputs Headphones: stereo mini-jack, maximum output level 5 mW + 5 mW

4、, load impedance 16 ohm General Power requirements Nickel metal hydride rechargeable battery NH-14WM (supplied) One LR6 (size AA) battery (not supplied) Sony AC Power Adaptor AC-E15L* (not supplied) connected to the DC IN 1.5V jack Battery operation time Battery life* BatteriesPlayback Ni-MHApprox.

5、21 hours* rechargeable battery (NH-14WM) One LR6 (size AA)Approx. 31 hours alkaline battery One LR6 (size AA)Approx. 56 hours* alkaline battery and a Ni-MH rechargeable battery (NH-14WM) * The battery life may be shorter depending on operating conditions and the temperature of the location. * With a

6、 fully charged battery Continued on next page US and foreign patents licensed from Dolby Laboratories Licensing Corporation. Model Name Using Similar MechanismNEW MD Mechanism TypeMT-MZE90-166 Optical Pick-up Mechanism TypeLCX-2E (Photo: Silver) Ver 1.1 2000. 02 收音机爱好者资料库 Ra d i o Fa n s .CN 2 Dimen

7、sions Approx. 78.4 13.5 71.5 mm (w/h/d) (3 1/8 9/16 2 7/8 in.) not including projecting parts and controls Mass Approx. 70 g (2.5 oz.) the player only Approx. 113 g (4.0 oz.) incl. a premastered MD and a nickel metal hydride rechargeable battery NH-14WM Supplied accessories Battery Charger (1) Recha

8、rgeable battery (1) Rechargeable battery carrying case (1) Headphones with a remote control (1) Dry battery case (1) Carrying pouch (1) AC Plug Adaptor (1) (World model only) Design and specifications are subject to change without notice. Flexible Circuit Board Repairing Keep the temperature of the

9、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 chip component. Notic

10、e 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-up (LCX-2E) As the lase

11、r 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 as it breaks easily. Lase

12、r tap Optical Pick-up flexible board 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 LOSSES OR EX

13、PENSES 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. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDE

14、NTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!

15、 LES COMPOSANTS IDENTIFIS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA 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. 收音机爱好者资料库 Ra d i o Fa

16、n s .CN 3 1.SERVICING NOTE.4 2.GENERAL.5 Playing an MD right away!.5 3.DISASSEMBLY.7 3-1. Lid Assy, Upper .7 3-2. Holder Assy.7 3-3. Mechanism Deck .8 3-4. System Board .8 3-5. “Plate (L) Assy, Fulcrum”, “Plate (R) Assy, Fulcrum”.9 3-6. SW Board, Main Board .9 3-7. Service Assy, OP .10 4.TEST MODE.1

17、1 4-1. General .11 4-2. Setting the TEST MODE .11 4-2-1. How to Set the TEST MODE .11 4-2-2. Operations when the TEST MODE is set .11 4-2-3. How to release the TEST MODE .11 4-3. Test Mode Structure .11 4-4. Manual Mode .12 4-4-1. Outline of the function .12 4-4-2. How to set the Manual Mode .12 4-5

18、. Overall Adjustment Mode .12 4-5-1. Outline of the Function .12 4-6. Self-diagnostic Display Mode .12 4-6-1. Outline of the Function .12 4-6-2. Self diagnostic Mode.13 4-6-3. Clearing the Error Display Code .13 4-7. Key Check Mode .14 4-7-1. Outline of the Function .14 4-7-2. Setting the Key Check

19、Mode.14 5.ELECTRICAL ADJUSTMENTS.15 5-1. General .15 5-2. Notes for Adjustment .15 5-2-1. Jigs.15 5-2-2. Adjustment sequence.15 5-2-3. Power.15 5-3. Reset NV.15 5-3-1. How to Reset NV .15 5-4. Manual Power Adjustments .15 5-4-1. Adjustment sequence.15 5-4-2. Vc PWM Duty (L) Adjustment Method.15 5-4-

20、3. Vrem PWM Duty (L) Adjustment Method.15 5-4-4. Vc PWM Duty (H) Adjustment Method .16 5-4-5. Vrem PWM Duty (H) Adjustment Method.16 5-5. Overall Adjustment Mode .16 5-5-1. Overall Adjustment Mode Structure.16 5-5-2. Overall CD and MO adjustment Method .16 5-5-3. Overall CD and MO adjustment Items.1

21、7 TABLE OF CONTENTS 6.DIAGRAMS.18 6-1. IC Pin Descriptions .18 6-1-1. IC801 CXR701080-006GA (System Control). 18 6-2. Block Diagrams . 21 6-2-1. MD Block Diagram .21 6-2-2. Servo Block Diagram . 23 6-2-3. System Control Block Diagram . 25 6-3. Printed Wiring Boards and Schematic Diagrams. 27 6-3-1.

22、Printed Wiring Board Main Board . 27 6-3-2. Schematic Diagram Main Board (1/4) . 31 6-3-3. Schematic Diagram Main Board (2/4) . 33 6-3-4. Schematic Diagram Main Board (3/4) . 35 6-3-5. Schematic Diagram Main Board (4/4) . 37 6-3-6. Printed Wiring Board System Board .39 6-3-7. Schematic Diagram Syste

23、m Board . 41 6-3-8. Printed Wiring Board SW Board .43 6-3-9. Schematic Diagram SW Board . 45 6-4. IC Block Diagrams .46 7.EXPLODED VIEWS.49 7-1. Main Unit Section .49 7-2. Mechanism Deck Section .50 8.ELECTRICAL PARTS LIST. 51 收音机爱好者资料库 Ra d i o Fa n s .CN 4 1) When repairing this device with the po

24、wer 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 OPEN/CLOSE switch (SW board S809) with tape. 2) This set is designed to perform automatic adjustment for each adjustment a

25、nd write its value to EEPROM. Therefore, when EEPROM (SYSTEM board IC802) has been replaced in service, be sure to perform automatic adjustment and write resultant values to the new EEPROM. Refer to section 5 Test Mode (page 11) for details. 3) Replacement of CXD2661GA-2 (IC601) and CXR701080-006GA

26、(IC801) used in this set requires a special tool. Therefore, they cannot be replaced. SECTION 1 SERVICING NOTE SW board S809 5 SECTION 2 GENERAL This section is extracted from instruction manual. 6 7 Note : This set can be disassemble according to the following sequence. SECTION 3 DISASSEMBLY 3-1. L

27、ID ASSY, UPPER 3-2. HOLDER ASSY Note : Follow the disassembly procedure in the numerical order given. SetLid Assy, UpperHolder AssyMechanism Deck“Plate (L) Assy, Fulcrum ”, “ Plate (R) Assy, Fulcrum” System Board Service Assy, OP SW Board, Main Board 1 2 3 screw(1.7),MI 4 screw(1.7),MI 5 lid assy, u

28、pper 1 shaft 2 shaft 3 holder assy 8 3-3. MECHANISM DECK 3-4. SYSTEM BOARD 7 mechanism deck 5 connector 6 CN551 claw 1 screw, step 2 3 4 1 CN601 2 SYSTEM board 9 3-5. “PLATE (L) ASSY, FULCRUM”, “PLATE (R) ASSY, FULCRUM” 3-6. SW BOARD, MAIN BOARD Note: When installing, fit the knob (OPEN). Note: When

29、 installing, fit the knobs (HOLD, MB, AVLS). 3 plate (L) assy, fulcrum 6 plate (R) assy, fulcrum 7 knob (open) 1 screw(1.7),MI 2 screw(1.7),MI 4 M 1.45 M 1.4 9 MAIN board 5 CN802 6 SW board 8 case, battery 7 removal the solders. 2 lid , battery case claw 1 3 4 10 3-7. SERVICE ASSY, OP 4 M 1.4 3 M 1.

30、4 1 washer 2 gear (SA) 5 service assy, OP 11 Press and hold down X to hold the current display while the key is being pressed. 4-2-3. How to release the TEST MODE When method 1 was used: Turn off the power and open the solder bridge on BP801on the system board. Note: The solder should be removed cle

31、an. The remaining solder may make a short with the chassis and other part. When method 2 was used: Turn off the power. Note: If electrical adjustment (see page 15) has not been finished completely, always start in the test mode. (The set cannot start in normal mode.) 4-3. TEST MODE STRUCTURE SECTION

32、 4 TEST MODE 4-1. GENERAL When entered in the TEST MODE, this set provides the Overall Adjustment mode which allows CD and MO discs to be auto- matically adjusted. In the Overall Adjustment mode , performs adjustments in sequence automatically, and displays the faulty location if any fault is found.

33、 In the Manual mode, selected ad- justments can be performed automatically. The attached remote control is used to operate the TEST MODE. Unless otherwise specified in the text, the key means that on the remote control. 4-2. SETTING THE TEST MODE 4-2-1. How to set the TEST MODE To set the TEST MODE,

34、 two methods are available. 1 Solder bridge and short BP801 (TEST) on the system board. Then turn on the power. 2 In the normal mode, operate the keys on the set and those on the remote control as specified below: Turn on HOLD switch on the set. Holding down x (STOP) key on the set, press the keys o

35、n the remote control in the following sequence: N t N t . t . t N t . t N t . t X t X 4-2-2. Operations when the TEST MODE is set When the TEST MODE is entered, the system switches to the display check mode within the TEST MODE. From this mode, the other Test modes can be accessed. When the TEST MOD

36、E is set, the LCD repeats a cycle of the following displays: Remote control LCD SYSTEM BOARD (SIDE A ) TP821 1-675-487- BP801 TP822 TP816 TP823 TP819 TP818 TP820 BP801 888u 004 V1.100 All on All off Microprocessor version display Test Mode (Display Check Mode) Manual Mode Servo Mode Audio Mode Power

37、 Mode OP Alignment Mode key key + key + key x x x key key key Overall Adjustment Mode Self-diagnostic Display Mode Key Check Mode DISPLAY key DISPLAY key (Press and hold down about 3 sec.) Terminate key checking or open the top panel. 12 Note: In the Power mode, the item title display is only displa

38、yed. 4. During each test, press and hold down N key or . key for a while to move the optical pickup on the sled outer or inner perimeter. 5. To terminate the Manual mode and return to the TEST MODE, press x key. 4-5. OVERALL ADJUSTMENT MODE 4-5-1. Outline of the function This mode is designed to adj

39、ust the servo system automatically by going through all the adjustment items. Usually, this mode is used to perform automatic adjustments when servicing the set. For further information, refer to section 5. ELECTRICAL ADJUST- MENTS (page 15). 4-6. SELF-DIAGNOSTIC DISPLAY MODE 4-6-1. Outline of the function The Self-diagnostic system is used in this set. If an error occurs du