sony_MZ-E501_service_manual 维修电路图.pdf

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1、MZ-E501 AEP Model Hong Kong Model SERVICE MANUAL PORTABLE MINIDISC PLAYER Ver 1.2 2001. 12 With SUPPLEMENT-1 Model Name Using Similar MechanismMZ-E500 MD Mechanism TypeMT-MZE500-174 Optical Pick-up Mechanism TypeLCX-4E US and foreign patents licensed from Dolby Laboratories Licensing Corporation SPE

2、CIFICATIONS Audio 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 objective lens surface on the optical pick-up

3、 block with 7 mm aperture. Revolutions Approx. 300 rpm to 2,700 rpm Error correction ACIRC (Advanced Cross Interleave Reed Solomon Code) Sampling frequency 44.1 kHz Coding ATRAC (Adaptive TRansform Acoustic Coding) ATRAC3: LP2 ATRAC3: LP4 Modulation system EFM (Eight to Fourteen Modulation) Number o

4、f channels 2 stereo channels 1 monaural channel Frequency response 20 to 20,000 Hz 3 dB Wow and Flutter Below measurable limits Outputs Headphones/earphones: stereo mini-jack, maximum output level 5 mW + 5 mW, load impedance 16 ohms Power requirements Nickel Cadmium rechargeable battery One NC-6WM (

5、supplied): 1.2V, 600 mAh One LR6 (size AA) battery (not supplied) External power jack: Power rating 3V DC AC power adaptor for the battery charging stand (supplied): AC230240V, 50Hz Battery operation time See “When to replace or recharge the battery” Dimensions Approx. 74.5 80.5 17.9 mm (w/h/d) (3 3

6、 1/4 23/32 in.) (not including projecting parts and controls) Mass Approx. 80 g (2.8 oz) (the player only) Supplied accessories Headphones/earphones with a remote control (1) Battery charging stand (assembly needed)(1) AC power adaptor* Rechargeable battery (1) Rechargeable battery carrying case (1)

7、 Dry battery case (1) Carrying pouch (1) AC plug adaptor (1) (world model only) US and foreign patents licensed from Dolby Laboratories. Design and specifications are subject to change without notice. Sony Corporation Personal Audio Company Published by Sony Engineering Corporation 9-873-162-03 2001

8、L1600-1 2001.12 收音机爱好者资料库 Ra d i o Fa n s .CN 2 MZ-E501 1. SERVICING NOTE 3 2. GENERAL 4 3. DISASSEMBLY 3-1. Case Assy, Holder Assy 5 3-2. Mechanism Deck 6 3-3. Bracket Assy 6 3-4. Main Board 7 3-5. Optical Pick-up Assy (LCX-4E) 7 4. TEST MODE 8 5. ELECTRICAL ADJUSTMENTS 12 6. DIAGRAMS 6-1. Block Di

9、agram 17 6-2. Printed Wiring Board Main Section (Side A) 18 6-3. Printed Wiring Board Main Section (Side B) 19 6-4. Schematic Diagram Main Section (1/3) 20 6-5. Schematic Diagram Main Section (2/3) 21 6-6. Schematic Diagram Main Section (3/3) 22 6-7. IC Block Diagrams 23 6-8. IC Pin Function Descrip

10、tion 25 7. EXPLODED VIEWS 7-1. Main Section 31 7-2. Mechanism Deck Section 32 8. ELECTRICAL PARTS LIST 33 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 tim

11、es). 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. Unleaded solder Boards requiring use of unleaded solder are p

12、rinted with the lead- free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size.) : LEAD FREE MARK Unleaded solder has the following characteristics. Unleaded solder melts at a temperature ab

13、out 40C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350C. Caution: The printed pattern (copper foil) may peel away if the heat

14、ed tip is applied for too long, so be careful! Strong viscosity Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. Usable with ordinary solder It is best to use only unleaded solder but unleaded so

15、lder may also be added to ordinary solder. 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 NUMBERS APPEAR AS SHOWN IN THIS M

16、ANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. TABLE OF CONTENTS CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. 收音机爱好者资料库 Ra d i o Fa n s .CN 3 MZ-E501 * Replacement of CXD2671-205GA (IC601) used in this s

17、et requires a special tool. When repairing this device with the power 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 (S809). SECTION 1 SERVICING NOTES NOTES ON HANDLING THE OPTIC

18、AL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic 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 t

19、he 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 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 lo

20、se your sight. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-4E) The laser diode in the optical pick-up block may suffer electrostatic break-down easily. When handling it, perform soldering bridge to the laser-tap on the flexible board. Also perform measures against electrostatic break-down suffi

21、ciently before the operation. The flexible board is easily damaged and should be handled with care. OPTICAL PICK-UP FLEXIBLE BOARD laser-tap Open/Close detection switch (S809) 收音机爱好者资料库 Ra d i o Fa n s .CN 4 MZ-E501 SECTION 2 GENERAL LOCATION AND FUNCTION OF CONTROLS N . VOL+/ GROUP x x X 1N VOL+ VO

22、L . 3 Color Info-LED ./N VOL +/ HOLD DISPLAYSOUND PLAYMODERPT/ENT x GROUP HOLD 3 Color Info-LED This section is extracted from instruction manual. 5 MZ-E501 r Disassemble the unit in the order as shown below. Note : Follow the disassembly procedure in the numerical order given. 3-1. CASE ASSY, HOLDE

23、R ASSY SECTION 3 DISASSEMBLY Optical pick-up assy (LCX-4E) Mechanism deckCase assy, Holder assySetBracket assyMAIN board case assy 1 screws (1.4), MI 3 Move it away from the projection case (rear) hold assy 2 1 screws (1.4), MI 3 Move it away from the projection 6 MZ-E501 3-3. BRACKET ASSY 3 screw (

24、1.7) 1 screw (1.7) 2 bracket (R) assy 4 bracket (L) assy 3-2. MECHANISM DECK 4 mechanism deck 1 step screw (MD) 5 OP FLEXIBLE board (CN501) 6 MOTER FLEXIBLE board (CN551) 3 claw 2 claw 3 claw 7 MZ-E501 3-4. MAIN BOARD 3-5. OPTICAL PICK-UP ASSY (LCX-4E) case (rear) 3 battery case lid 2 claw 5 Remove

25、the soldering 6 MAIN board 5 Remove the soldering 4 ornamental strip 7 battery case assy 1 screw (1.7) optical pick-up assy (LCX-4E) 3 screw (MI 1.4) 5 4 thrust detent spring 2 gear (SA) 1 washer 8 MZ-E501 Remote control LCD Press and hold down X to hold the current display while the key is being pr

26、essed. 4-2-3. How to release the TEST MODE When method 1 was used: Turn off the power and open the solder bridge on TAP601 on the main board. Note : The solder should be removed clean. The remaining solder may make a short with the chassis and other part. When method 2 was used: Turn off the power.

27、Note : If electrical adjustment (see page 12) has not been finished completely, always start in the test mode. (The set cannot start in normal mode) 4-3. TEST MODE STRUCTURE 4-1. GENERAL When entered in the TEST MODE, this set provides the Overall Adjustment mode which allows CD and MO discs to be a

28、uto- matically adjusted. In the Overall Adjustment mode, the system discriminates between CD and MO discs, performs adjustments in sequence automatically, and displays the faulty location if any fault is found. In the Manual mode, selected adjustments can be performed automatically. The attached rem

29、ote 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, two methods are available. 1 Solder bridge and short TAP601 (TEST) on the main board. Then

30、turn on the power. Press the x button or close the upper panel. MAIN BOARD (SIDE B) 2 In the normal mode, operate the keys on the set and those on the remote control rapidly as specified below: Turn on HOLD switch on the set. Holding down x (STOP) key on the set, press the keys on the remote control

31、 in the following sequence: N t N t . t . t N t . t N t . t X t X Note : When you press an incorrect switch by mistake, remove your hands from the switches and perform all the operations once again from the very beginning. 4-2-2. Operations when the TEST MODE is set When the TEST MODE is entered, th

32、e system switches to the display check mode within the TEST MODE. From this mode, the other Test modes can be accessed. When the TEST MODE is set, the LCD repeats a cycle of the following displays: SECTION 4 TEST MODE All on All off Microprocessor version display 012 V1.110 Test Mode (Display Check

33、Mode) Manual Mode Servo Mode Audio Mode Power Mode OP Alignment Mode key key keyVOL+ key x x B key key xkey .or key xkey Overall Adjustment Mode Sound Skip Check Result Display Mode Self-diagnostic Display Mode Key Check Mode DISPLAY key DISPLAY key (Press and hold down about 3 sec) Terminate key ch

34、ecking or open the top panel. VOL VOL VOL+ OPEN : Normal mode SHORT : Test mode TAP601 9 MZ-E501 2. 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. 3. Each test item is assigned with a three-digit item number. The 100t

35、h place is a major item, 10th place is a middle item, and unit place is a minor item. Note: In the Power mode, the item title display is only displayed. 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

36、designed to adjust the servo system automatically by going through all the adjustment items. The power adjustment manual setting is performed in this mode also. Usually, this mode is used to perform automatic adjustments when servicing the set. For further information, refer to section 5. ELECTRICAL

37、 ADJUSTMENTS. (See page 12) 4-4. MANUAL MODE 4-4-1. Outline of the function The Manual mode is designed to perform adjustments and operational checks on the sets operation according to each individual function. Usually, no adjustments are made in this mode. However, the Manual mode is used to clear

38、the memory before performing automatic adjustments in the Overall Adjustment mode. 4-4-2. How to set the Manual mode 1. Set the TEST MODE and press VOL+ key to set the Manual mode. Remote control LCD display 4. During each test mode, the display is changed from one to another each time DISPLAY key i

39、s pressed. Address & Adjusted Value Display LCD display Jitter Value & Adjusted Value Display LCD display Block Error Value & Adjusted Value Display LCD display ADIP Error Value & Adjusted Value Display LCD display Focus Drive Voltage Value & Adjusted Value Display Item Title Display LCD display 000

40、 Manual Change Major Item Change Middle Item Change Minor Item Change Adjustment Value Write Adjustment Value . key : 100th place of mode number increase VOL+ VOL VOL+ VOL key : 100th place of mode number decrease key : 10th place of mode number increase key : 10th place of mode number decrease key

41、: Up key : Down key : When adjusted value is changed : Adjusted value is written. When adjusted value is not changed : That item is adjusted automatically. keykey x key x N key N key : Unit place of mode number increase key : Unit place of mode number decrease N X VOL+ VOL 011 C68S5E adress mode num

42、ber adjusted value 011 OFEJ5E jitter value mode number adjusted value 011 063B5E block error value mode number adjusted value 011 072A5E ADIP error value mode number adjusted value 011 LrefPw 5E item title mode number adjusted value 011 000F5E forcus drive voltage value mode number adjusted value 10

43、 MZ-E501 3. Hereinafter, each time N key is pressed, the reference information display changes as follows: Press . key to go back to the previous display. Contents of the history codes 0XX 1 # # # # 0XX N # # # # 0XX N1 # # # # 0XX N2 # # # # 0XX R 4-6. SELF-DIAGNOSTIC DISPLAY MODE 4-6-1. Outline of

44、 the function The Self-diagnostic system is used in this set. If an error occurs during playback, this system detects the fault through the microprocessors mechanism and power control blocks and stores the cause in EEPROM in a history format. This history, which can be viewed in the TEST MODE, provi

45、des the means of locating the fault in troubleshooting. 4-6-2. Self-diagnostic mode 1. Set the TEST MODE. 2. With all the LCD display segments blinking on the set, press DISPLAY key and the Self-diagnostic mode is entered. 001 1 Adrs History code Error display code Simplified contents History code n

46、umberContents 1The first error that occurred. NThe last error that occurred. N-1The first error from the last one. N-2The second error from the last one. R Total recording time ( is displayed for MZ-E501) Description No error An attempt to access an abnormal address. HIGH TEMP Focus off-center. Abno

47、rmal rotation of disc Faulty TOC contents Data could not be read at SYNC Instantaneous interruption detected. Offset error FE ABCD Offset error TE Offset error X1 TE Offset error Description of the error display codes Meaning of code No error Access target address illegally specified HIGH TEMP FOCUS

48、 ERROR SPINDLE ERROR TOC ERROR READ DATA ERROR LOWBATT OFFSET ERROR FE_ABCD_OFFSET_ERR TE_OFFSET_ERR X1_TE_OFFSET_ERR Contents of fault No error Servo system error TOC error Power system error Offset error Display code 00 01 02 03 04 11 12 22 31 32 33 34 Simplified contents Adrs Temp Fcus Spdl TOC D

49、ata LBat Ofst ABCD TE X1TE 4-6-3. Clearing the error display code After servicing, reset the error display code. 1. Set the TEST MODE. 2. Pressing the DISPLAY key on the remote control activates the self-diagnosis display mode. 3. To reset the error display code, press X key (2 times)on the remote control when the code is displayed. (except “R - - - -” ) (All the data on the 1st, N, N-1 and N-2 will be reset) 11 MZ-E501 4-8. KEY CHECK MODE 4-8-1. Outline of the function Thi