sony_MZ-E75_service_manual 维修电路图.pdf

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1、Ver 1.1 2000.01 MICROFILM MZ-E75 SERVICE MANUAL PORTABLE MINIDISC PLAYER SPECIFICATIONS US Model AEP Model UK Model Australian Model E Model Tourist Model Model Name Using Similar MechanismNEW MD Mechanism TypeMT-MZE75-167 Optical Pick-up Mechanism TypeODX-1B US and foreign patents licensed from Dol

2、by Laboratories Licensing Corporation System Audio playing system Minidisc digital audio system Laser diode properties Material : GaAlAs Wavelength : =790nm 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 l

3、ens 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 Acoustic Coding (ATRAC) Modulation system EFM (Eight to Fourteen Modulation) Numb

4、er 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 General Power requirements Nickel metal hydride rechargeable battery NH-14WM (

5、supplied) One LR6 (size AA) alkaline battery (not supplied) Sony AC Power Adaptor (not supplied) connected at the DC IN 1.5V jack Battery operation time BatteriesPlayback Ni-MHApprox. Rechargeable battery (NH-14WM)16 hours One LR6 (size AA)Approx. Sony alkaline batteries22 hours One LR6 (size AA) an

6、d aApprox. Ni-MH (NH-14WM)42 hours Ni-CDApprox. Rechageable battery (NC-6WM)8 hours One LR6 (size AA) and aApprox. Ni-CD (NC-6WM)32 hours Dimensions Approx. 86 x 16.3 x 75.4 mm (w/h/d) not including projecting parts and controls Mass Approx. 98 g the player only Approx. 141 g incl. a premastered MD

7、and a nickel metal hydride rechargeable battery NH-14WM (N) Supplied accessories Battery charger (1) Rechargeable battery (1) Rechargeable battery carrying case (1) Headphones with a remote control (1) Dry battery case (1) Carrying pouch (1) AC plug adaptor (E, Tourist model) (1) Design and specific

8、ations 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. Upper Panel ASSY, “Panel ASSY, Bottom” . 4 3-2. Belt, Ornamental. 4 3-3. Main Board . 5 3-4. Optical Pick-up Block AS

9、SY . 5 4.TEST MODE. 6 5.ELECTRICAL ADJUSTMENTS. 9 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

10、 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 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

11、 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. TABLE OF CONTENTS CAUTION Use of controls or adjustments or performance of procedures other than those specified here

12、in 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 EXPENSES RESULTING FROM ANY DEFECTIVE PRODUCT OR THE USE OF ANY PRODUCT. “MD WALKMAN” is a trademark of Sony Corporation. This Mini Disc p

13、layer is classi- fied as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior. 6.DIAGRAMS 6-1. Explanation of IC Terminals. 10 6-2. Block Diagram. 13 6-3. Printed Wiring Boards . 16 6-4. Schematic Diagram. 19 7.EXPLODED VIEWS 7-1. Main Section. 26 7-2. Mechanism

14、 Deck Section . 27 8.ELECTRICAL PARTS LIST. 28 SECTION 1 SERVICING NOTE 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 (S801). Mechanism

15、 deck section Open/Close detection switch (S801) * Replacement of CXD2661GA-2 (IC601) used in this set requires a special tool. Therefore, it cannot be replaced. 收音机爱好者资料库 Ra d i o Fa n s .CN 3 SECTION 2 GENERAL LOCATION AND FUNCTION OF CONTROLS Main Unit Headphones with Remote Control 1 i 1 jack 2

16、OPEN button 3 OPERATE indicator 4 B button 5 . button 6 x button 7 i 2 jack 1 Headphones 2 x button 3 B /. button 4 VOL +/ button 5 DISPLAY button 8 VOLUME + button 9 VOLUME button q; External battery terminal (+/) qa DIGITAL SOUND PRESET switch qs AVLS switch qd HOLD switch 2 7 3 1 6 4 q; qa? qs qd

17、 9 5 8 4 5698 321 7 6 PLAYMODE button 7 DISPLAY window 8 X button 9 HOLD . switch 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. UPPER PANEL ASSY, “PANEL ASSY, BOTTOM” 3-2. BELT, ORNAMENTAL r The equipment can be remov

18、ed using the following procedure. Optical pick-up block ASSYsetUpper panel ASSY, “Panel ASSY, bottom”Belt, OrnamentalMain board 1 Screws (1.4) 3 Screw (1.7) Upper panel ASSY 6 Screws (1.4) 5 7 Claw 4 Claw 2 Press the OPEN button Main unit Panel ASSY, bottom Main unit Belt, ornamental 2 1 Move it awa

19、y from projection 5 3-3. MAIN BOARD 3-4. OPTICAL PICK-UP BLOCK ASSY 1 Screws (M1.4 toothed lock) 2 Screw (HP), step Main board Main unit 5 OP flexble board 3 CLV fexble board 4 3 Screw (M1.4) precision pan Shaft (Main) Chissis ASSY OP flexible board Optical pick-up block ASSY OP flexible board Doubl

20、e sided adhesive tape 2 1 5 6 4 Note :Put the OP flexible board to a correct position of chassis ASSY. 6 SECTION 4 TEST MODE Outline In this set, overall adjustment mode is made available by enter- ing test mode to perform automatic adjustment of CD and MO. In the overall adjustment mode, the disc i

21、s 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. Operation in the test mode is performed with the Remote Com- mander. A key having no particular

22、description in the text, indi- cates a Remote Commander key. Setting the Test Mode 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 x key on the set, press the following remote commander keys in the foll

23、owing order : B/ t B/ t . t . t B/ t .t B/ t . t X t X 2. Entering method by shorting the test point Solder bridge the test point TAP805 (TEST) on the main board (connect IC801 pin ed to GND), and turn on the POWER. MAIN BOARD (SIDE B) Releasing the Test Mode 1. When test mode was entered with key i

24、nput, turn off the POWER. 2. When test mode was entered by shorting the test point, turn off the POWER and open the solder bridge of TAP805 (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 d

25、isplay t All lit t All off - is repeated. (The ROM version is constantly displayed.) 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

26、 mode, press the VOLUME key and use the B/ key to set the servo mode. When the servo mode is set, use the B/ 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. S

27、tructure of Servo Mode R808 R801 R802 R818 R804 R807 R C805 C565 SP805 SP806 SP804 X801 807 UME+ 552 RB801 4 5 03 TAP805 (TEST) TP811 TP8061 TP852 RB802 1 60 5 55 10 50 15 45 20 21 80 25 75 30 70 35 65 40 61 41 IC801 S DIGITAL S S8 AV LIMITT 2T Test mode Short : Test mode Open : Normal mode 1 0 0 V

28、1 . 0 0 0 ROM version display LCD on remote commander S H U F F B/? key B/? key x key x key x key x key VOL + key VOL key (044 Start ?) Overall adjustment mode (Auto?) Adjustment mode (Manu ?) Servo mode 0 0 0 Audio mode 1 0 0 Power mode 3 0 0 VOL +, keys +, keys +, keys Display when test mode is se

29、t Displays of the LCD on the remote commander are shown in parentheses. Servo mode 0 0 0 Offset adjustment 0 1 0 Laser power adjustment 0 2 0 011 to 013? *1 021 to 023? *1 231 x key x key x key x key B/ key B/ key B/ key B/ key B/? key VOL +, keys VOL +, keys (See page 7.) *1 Repeatedly press B/ key

30、 to change the mode. (Refer to the following list for a description of each mode.) 7 2. Description of Each Mode 010 Offset adjustment ModeDescription 011VC offset, FE offset, ABCD offset 012Not used 013Not used 020 Laser power adjustment ModeDescription 021MO power (GRV) 022MO power (LPIT) 023CD po

31、wer (HPIT) 030 MO adjustment ModeDescription 031MO EF balance 032MO EF gain 033MO ABCD gain 034MO focus gain 035MO tracking gain 036MO RF gain 037 038 039 (03a) (03b) (03c) 040 Lower reflection CD adjustment ModeDescription 041Lower reflection CD EF balance 042Lower reflection CD tracking offset 043

32、Lower reflection CD ABCD gain 044Lower reflection CD focus gain 045Lower reflection CD tracking gain 046Lower reflection CD focus bias 047 050 CD adjustment ModeDescription 051CD EF balance 052CD tracking offset 053CD ABCD gain 054CD focus gain 055CD tracking gain 056CD focus bias 057 058 059 (05a)

33、(05b) (05c) (See page 6.) x key x key x key x key VOL +, keys MO adjustment 0 3 0 031 to 039, 03a to 03c *1 B/ key x key x key VOL +, keys CD adjustment 0 5 0 051 to 059, 05a to 05c? *1 B/ key x key x key VOL +, keys Sled movement 0 6 0 061 , 062? *1 B/ key VOL +, keys 041 to 047? *1 B/ key Low refl

34、ection CD adjustment 0 4 0 x key x key x key x key VOL +, keys NV relation 0 9 0 091 to 093? *1 B/ key B/ key B/ key B/ key B/ key B/ key B/ key VOL +, keys 071 to 072? *1 B/ key Automatic adjustment 0 7 0 231 Retern the Offset adjustment (0 1 0) *1 : Repeatedly press B/ key to change the mode. (Ref

35、er to the following list for a description of each mode.) 8 060 Sled movement ModeDescription 061Sled in 062Sled out 070 Automatic adjustment ModeDescription 071Focus search 072Access 32 090 NV relation ModeDescription 091NV clear 092Power OFF 093Function code change Audio Mode Enter the test mode a

36、nd press the VOL key. Then, press the B/ key and the VOL + key in this turn to enter audio mode. When entering another mode, refer to the configuration of test mode. 1. Structure of Audio Mode When the B/. keys is pressed, the volume of the main unit is maximized/minimized. Audio mode 1 0 0 Audio pl

37、ayback test 1 1 0 Beep sound 1 1 1 1kHz 0dB L/R 1 1 2 12dB 12dB 12dB Infinity Zero 1 1 3 1kHz 0dB L 1 1 4 1kHz 0dB R 1 1 5 headphones output x key x key B/ key B/ key B/ key x key B/ key x key B/ key x key B/ key x key B/ key Power Mode Enter the test mode and press the VOL key. Then, press the B/ k

38、ey and the VOLUME 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 VOL + key to enter overall adjustment mode. When entering another mode, refer to the confi

39、guration 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 Power mode 3 0 0 UNREG check 31 0 Power OFF 3 1 1 x key x key B/ key B/ key B/? key 040Auto? Start ? CD automatic adjustment MO automati

40、c adjustment OK NG OK NG Overall adjustment mode Auto? Adjustment mode Manu ? x key x key x key x key B/ key (to discriminate between CD and MO) B/ key 9 * Remote commander display during automatic adjustment 4. If result of automatic adjustment is OK, the following display appears. 5. If result of

41、automatic adjustment is NG, the following display appears. * If NG, enter servo mode to perform automatic adjustment of the item determined as NG. 055 Adjustment value (flashing) Mode No. under adjustment 056End-OK 052NG Error code NG mode No. Adjustment in Servo Mode Method 1. When each adjustment

42、mode is set according to the structure of servo mode, the lower two digits of the mode No. and the ad- justment value written in EEPROM are displayed and lit on the LCD on the remote commander. 2. When the X key is pressed, the following display appears and the automatic adjustment is performed. Not

43、e)Although the VOL +/ keys can be used to change the adjustment value to any value, they should not be used whenever possible. 3. When the automatic adjustment is completed, the flashing ad- justment value is lit. 052 Adjustment value (lit) Mode No. 052 Adjustment value (flashing) 052 Adjustment val

44、ue (lit) In MO Automatic adjustment Mode No.ModeDescription 1061Sled in 2062Sled out 3071Focus search 4031MO EF balance 5033MO ABCD gain 6031MO EF balance 7032MO tracking offset 8034MO focus gain 9035MO tracking gain 10036MO focus bias SECTION 5 ELECTRICAL ADJUSTMENTS Notes for Adjustment In this se

45、t, automatic adjustment of CD and MO can be per- formed by entering the test mode. 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 VOL + k

46、ey to enter overall adjustment mode. 2. Insert the CD test disc (TGYS-1) or SONY MO disc (recorded) commercially available. 3. Press the B/ key twice. The disc is determined whether it is CD or MO and each adjustment mode is set. Automatic adjust- ments are performed in the order of the items listed

47、 below. In CD Automatic adjustment Mode No.ModeDescription 1061Sled in 2062Sled out 3071Focus search 4051CD EF balance 5053CD ABCD gain 6051CD EF balance 7052Tracking offset 8054CD focus gain 9055CD tracking gain 10056CD focus bias 10 SECTION 6 DIAGRAMS 6-1. EXPLANATION OF IC TERMINALS MAIN BOARD IC501 CXA2523ATQ-T4 (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No.Pin nameI/