SONY mz-e44_e45 维修电路图.pdf

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1、Ver 1.1 1999.01 MICROFILM MZ-E44/E45 SERVICE MANUAL PORTABLE MINIDISC PLAYER SPECIFICATIONS US Model AEP Model UK Model Australian Model Tourist Model MZ-E44 E Model MZ-E44/E45 Model Name Using Similar MechanismNEW MD Mechanism TypeMT-MZE44-140 Optical Pick-up Mechanism TypeODX-1A/1B Photo : MZ-E44

2、(SILVER)Photo : MZ-E45 (GRAY) US and foreign patents licensed from Dolby Laboratories Licensing Corporation MD Section Audio playing system Minidisc digital audio system Laser diode properties Material : GaAlAs Wavelength : =790nm Emission duration : continuous Laser output : less than 44.6 W* * Thi

3、s output is the value measured at a distance of 200 mm from the objective lens surface on the optical pick-up block with 7mm aperture. Revolutions 400 rpm to 900 rpm (CLV) Error correction Advanced Cross Interleave Reed Solomon Code (ACIRC) Sampling frequency 44.1kHz Coding Adaptive Transform Acoust

4、ic 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 5mW+5mW, load impedance 16 ohm Gen

5、eral Power requirements Rechageable battery (supplied) Nickel metal hydride rechargeable battery NH-9WM (N) One LR6 (size AA) alkaline battery (not supplied) Sony AC Power Adaptor AC-E15L (not supplied) connected at the DC IN 1.5V jack Battery operation time BatteriesPlayback Nickel metal hydrideApp

6、rox. Rechargeable battery (NH-9WM (N)5.5 hours One LR6 (size AA)Approx. Sony alkaline dry batteries8.5 hours Nickel metal hydride (NH-9WM (N) +Approx. One LR6 (size AA)16 hours Dimensions Approx. 87 x 17.8 x 91.5 mm (w/h/d) (3 1/2 x 23/32 x 3 5/8 in) not including projecting parts and controls Mass

7、Approx. 115 g (4.1 oz.) the player only Approx. 155 g (5.5 oz.) incl. a premastered MD and a nickel metal hydride rechargeable battery NH-9WM (N) Supplied accessories Battery charger (1) Rechargeable battery (1) Rechargeable battery carrying case (1) Headphones with a remote control (1) Dry battery

8、case (1) Handstrap (1) Carrying pouch (1) LR6 (size AA) alkaline battery (1) (Tourist model only) Design and specifications are subject to change without notice. 收音机爱好者资料库 Ra d i o Fa n s .CN 2 Specifications . 1 1.SERVICING NOTE. 2 2.GENERAL Location and Function of Controls . 3 3.DISASSEMBLY 3-1.

9、Upper Panel Assy . 4 3-2. Bottom Panel Assy . 4 3-3. Main board. 4 3-4. Belt Assy, Front Panel Assy. 5 3-5. Mechanism Deck Section . 5 3-6. Optial Pick-up Block Assy . 6 4.TEST MODE. 7 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGR

10、AMS 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 the temperature of the soldering iron around 270C during repairing. Do not t

11、ouch 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 of a tantalum capacitor may be

12、dam- aged by heat. TABLE OF CONTENTS 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 Mini Disc player is classi- fied as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior. 5.ELECTRICAL ADJUSTMENTS. 10 6.DIAGRAMS 6-1. Ex

14、planation of IC Terminals. 13 6-2. Block Diagram. 15 6-3. Printed Wiring Boards . 18 6-4. Schematic Diagram. 21 7.EXPLODED VIEWS 7-1. Panel Section . 28 7-2. Main Section. 29 7-3. Mechanism Deck Section . 30 8.ELECTRICAL PARTS LIST .31 SECTION 1 SERVICING NOTE When repairing this device with the pow

15、er on, if you remove the main board, this device stops working. In this case, you work without the device stopping by fastening the hook of the Open/Close detection switch (S801) with tape. Chassis ASSY Main board Tape Open/Close switch (S801) 收音机爱好者资料库 Ra d i o Fa n s .CN 3 SECTION 2 GENERAL LOCATI

16、ON AND FUNCTION OF CONTROLS Headphones with Remote Control 2 7 6 3 1 5 4 8 ! 9 1 2 3 4 568 9 7 Main Unit 1 MD operate buttons ” + (PLAY FF ) = (REW ) p (STOP) 2 HOLD switch 3 VOLUME +/ buttons 4 EJECT button 5 OPERATE lamp 6 Battery compartment 7 External battery terminal (+/) 8 DIGITAL MEGA BASS s

17、witch 9 AVLS switch ! 2 / REMOTE jack 1 Headphones 2 MD operate switch and buttons ” + (PLAY FF) = (REW) p (STOP) 3 VOL +/ button 4 Display indicator 5 DISPLAY button 6 PLAYMODE button 7 P (PAUSE) b utton 8 HOLD c switch 9 p (STOP) b utton 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SECTION 3 DISASSEMBLY Note :

18、 Follow the disassembly procedure in the numerical order given. 3-1. UPPER PANEL ASSY 3-3. MAIN BOARD r The equipment can be removed using the following procedure. 3-2. BOTTOM PANEL ASSY 1 3 2 Screws (M1.4) pan precision Upper panel ASSY Main section 2 Screws (M1.4) pan precision 2 1 Screws (M1.4) p

19、an precision Bottom panel ASSY Main section 1 Screws (M1.4) pan precision 8 ! 4 Switch unit (CN801) 9 Remove solder 9 Remove solder 9 Remove solder 1 Screw (M1.4x2) toothed lock 7 Screw tapping (M1.7) 1 Screws (M1.4x2) toothed lock 2 Screw Main board Battery case ASSY 6 Flexible (CLV) board (CN551)

20、5 Flexible board (CN501) 3 Screw (M1.4) pan precision setMain boardBelt ASSY, Front panel ASSY Mechanism deck sectionOptical pick-up block ASSY Upper panel ASSY Bottom panel ASSY 5 3-4. BELT ASSY, FRONT PANEL ASSY 3-5. MECHANISM DECK SECTION 32 1 8 4 Boss Boss Main section 5 Belt ASSY 7 Claws Claw B

21、oss Claws Front panel ASSY 6 Screw (M1.4) pan precision 3 1 Remove claws 1 Remove claws 2 Step screws Chassis ASSY (main section) Mechanism deck section 6 3-6. OPTICAL PICK-UP BLOCK ASSY 3 4 5 1 Screw precision 2 OP flexible board Main shaft Chassis ASSY (MD section) Optical pick-up block ASSY OP fl

22、exible board Sheet (SW) 5 mm Optical pick-up ASSY r NOTE When replacing the optical block, the OP flexible board protec- tive sheet (SW) is necessary. Before replacing, check where the sheet (SW) is pasted onto the old OP flexible board and paste it on the new OP flexible board in the same way. Past

23、ing on the sheet (SW) : Paste on aligning the sheet (SW) center section with the edge of the OP flexible board as in the figure and folding the excess over onto the opposite side. 7 SECTION 4 TEST MODE Outline In this set, overall adjustment mode is made available by enter- ing test mode to perform

24、automatic adjustment of CD and MO. In the overall adjustment mode, the disc is determined whether it is CD or MO and adjustments are performed in sequence. If a fault is found, the location of the fault is displayed. Also, in servo mode, each adjustment can be automatically made. Setting the Test Mo

25、de To enter the test mode, two methods are available : 1. Entering method with key input. Turn on the HOLD switch on the set. While holding down the p key on the set, press the following remote commander keys in the following order : + n + n = n = n + n = n + n = n P n P 2. Entering method by shorti

26、ng the test point Solder bridge the test point TAP801 (TEST) on the main board (connect IC801 pin # to GND), and turn on the POWER. MAIN BOARD (Conductor side) Releasing the Test Mode 1. When test mode was entered with key input, turn off the POWER. 2. When test mode was entered by shorting the test

27、 point, turn off the POWER and open the solder bridge of TAP801 (TEST MODE) on the main board. Operation of Setting on Test Mode When the test mode is set, the LCD displays the following : The cycle - the above ROM version display n All lit n All off - is repeated. (The ROM version is constantly dis

28、played.) When the PLAY MODE key is pressed and hold down, the dis- play at that time is held so that display can be checked. Configuration of Test Mode The test mode has the configuration given below. Servo Mode Set the test mode, press the VOLUME key and use the ” key to set the servo mode. When th

29、e servo mode is set, use the + key and the = key to move the optical pick-up to the outer circumference and to the inner circumference respectively. When entering another mode, refer to the configuration of test mode. 1. Structure of Servo Mode V 3 . 3 0 0 ROM version display LCD on remote commander

30、 ” key ” key p key p key p key p key VOL + key VOL key (Start ?) Overall adjustment mode (Auto?) Adjustment mode (Manu ?) Servo mode 0 0 0 Audio mode 1 0 0 Servo mode 3 0 0 +, keys +, keys +, keys Display when test mode is set Displays of the LCD on the remote commander are shown in parentheses. Ser

31、vo mode 0 0 0 Offset adjustment 0 1 0 Laser power adjustment 0 2 0 011 to 013? *1 021 to 024? *1 231 p key p key p key p key ” key ” key ” key ” key ” key +, keys+, keys (See page 8) *1 Repeatedly press ” key to change the mode. (Refer to the following list for a description of each mode.) Test mode

32、 Short : Test mode Open : Normal mode 8 2. Description of Each Mode 010 Offset adjustment ModeDescription 011FE offset 012TE offset 013All servo ON 020 Laser power adjustment ModeDescription 021MO power A 022MO power E 023CDL power 024CD power 030 MO adjustment ModeDescription 031MO EF balance 032MO

33、 EF gain 033MO ABCD gain 034MO focus gain 035MO tracking gain 036MO RF gain 037MO ADIP gain 038MO focus bias E 039CD focus bias A 040 Lower reflection CD adjustment ModeDescription 041Lower reflection CD EF balance 042Lower reflection CD EF gain 043Lower reflection CD ABCD gain 044Lower reflection C

34、D focus gain 045Lower reflection CD tracking gain 046Lower reflection CD RF offset 047Lower reflection CD RF gain 048Lower reflection CD focus bias 050 CD adjustment ModeDescription 051CD EF balance 052CD EF gain 053CD ABCD gain 054CD focus gain 055CD tracking gain 056CD RF offset 057CD RF gain 058C

35、D focus bias (See page 7.) p key p key p key p key +, keys MO adjustment 0 3 0 031 to 039? *1 ” key p key p key +, keys CD adjustment 0 5 0 051 to 058? *1 ” key p key p key +, keys Sled movement 0 6 0 061 , 062? *1 ” key +, keys 041 to 048? *1 ” key Low reflection CD adjustment 0 4 0 p key p key p k

36、ey p key +, keys NV relation 0 9 0 091, 092, 093? *1 ” key ” key ” key ” key ” key ” key ” key +, keys 071, 072, 073, 074? *1 ” key Automatic adjustment 0 7 0 231 Retern the Offset adjustment (0 1 0) *1 : Repeatedly press ” key to change the mode. (Refer to the following list for a description of ea

37、ch mode.) 9 060 Sled movement ModeDescription 061Sled in 062Sled out 5 070 Automatic adjustment ModeDescription 071Focus search 072Access 32 073ADER check 074Tracking sensitivity adjust 090 NV relation ModeDescription 091NV clear 092Power OFF 093Function code change Audio Mode Enter the test mode an

38、d press the VOLUME key. Then, press the ( key and the VOLUME + key in this turn to enter audio mode. When entering another mode, refer to the configuration of test mode. 1. Structure of Audio Mode The mode No. 111 is for S/N and crosstalk. The mode No. 115 is for distortion factor and frequency char

39、acteristics. When the VOLUME +/ keys is pressed in any mode, the vol- ume of the headphones is changed (increased/decreased) in units of one step. When the + / = keys is pressed, the volume of the headphones is maximized/minimized. For the volume value, any changed value remains as it is basi- cally

40、. However, when the volume is switched from 114 to 115 or 118 to 119, it returns the default value. Audio mode 1 0 0 Audio playback test 1 1 0 1kHz 0dB L/R 1 1 1 Infinity Zero 1 1 2 12dB 12dB 12dB 20dB 20dB 20dB 20dB 40dB 1kHz 0dB L 1 1 3 1kHz 0dB R 1 1 4 1kHz 20dB L/R 1 1 5 20Hz 20dB L/R 1 1 6 20kH

41、z 20dB L/R 1 1 7 16kHz De-Emphasis L/R 1 1 8 100Hz 0dB L/R 1 1 9 headphones output p key p key ” key ” key ” key p key ” key p key ” key p key ” key p key ” key p key ” key p key ” key p key ” key p key ” key 10 Power Mode Enter the test mode and press the VOLUME key. Then, press the ( key and the V

42、OLUME key in this turn to enter power mode. When entering another mode, refer to the configuration of test mode. 1. Structure of Power Mode Overall Adjustment Mode Enter the test mode and press the VOLUME + key to enter over- all adjustment mode. When entering another mode, refer to the configuratio

43、n of test mode. When the overall adjustment mode is entered, the LCD on the remote commander display the following : 1. Structure of Overall Adjustment Mode SECTION 5 ELECTRICAL ADJUSTMENTS Notes for Adjustment In this set, automatic adjustment of CD and MO can be per- formed by entering the test mo

44、de. Adjustments are performed in the overall adjustment mode. If an item is determined as NG, the item is readjusted in servo mode. Adjustment Method in Overall Adjustment Mode 1. Enter the test mode and press the VOLUME + key to enter over- all adjustment mode. 2. Insert the CD test disc (TGYS-1) o

45、r SONY MO disc (recorded) commercially available. 3. Press the ( key twice. The disc is determined whether it is CD or MO and each adjustment mode is set. Automatic adjustments are performed in the order of the items listed below. In CD Automatic adjustment Mode No.ModeDescription 1061Sled in 2071Fo

46、cus search 3062Sled out 5 4051CD EF balance 5052CD EF gain 6051CD EF balance 7053CD ABCD gain 8054CD focus gain 9055CD tracking gain 10056CD RF offset 11057CD RF gain 12056CD RF offset 13058CD Focus bias 040Auto? Power mode 3 0 0 UNREG check 31 0 Power OFF 3 1 1 p key p key ” key ” key ” key Start ? CD automatic adjustment MO automatic adjustment OK NG OK NG Overall adjustment mode Auto? Adjustment mode Manu ? p key p key p key p key ” key (to discriminate between CD and M