sony_MZ-E77_service_manual 维修电路图.pdf

《sony_MZ-E77_service_manual 维修电路图.pdf》由会员分享，可在线阅读，更多相关《sony_MZ-E77_service_manual 维修电路图.pdf（47页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL PORTABLE MINIDISC PLAYER E Model Tourist Model SPECIFICATIONS MZ-E77 US and foreign patents licensed from Dolby Laboratories Licensing Corporation. Photo: Silver type Model Name Using Similar MechanismMZ-E90 MD Mechanism TypeMT-MZE90-166 Optical Pick-up Mechanism TypeLCX-2E System Aud

2、io 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 block with 7 m

3、m aperture. Revolutions 600 rpm to 2250 rpm Error correction Advanced Cross Interleave Reed Solomon Code (ACIRC) Sampling frequency 44.1 kHz Coding Adaptive TRansform Acoustic Coding (ATRAC) Modulation system EFM (Eight to Fourteen Modulation) Number of channels 2 stereo channels 1 monaural channel

4、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, load impedance 16 ohms General Power requirements Nickel metal hydride rechargeable battery NH-14WM (supplied) One LR6 (size AA) battery (not supplie

5、d) Sony AC Power Adaptor AC-E15L* (not supplied) connected to the DC IN 1.5V jack Battery operation time Battery life* Batteries Ni-MH rechargeable battery (NH-14WM) One LR6 (size AA) alkaline battery One LR6 (size AA) alkaline battery and a Ni-MH rechargeable battery (NH-14WM) *The battery life may

6、 be shorter depending on operating conditions and the temperature of the location. * With a fully charged battery Dimensions Approx. 78.3 13.9 71.4 mm (w/h/d) (3 1/8 9/16 2 7/8 in.) not including projecting parts and controls Mass Approx. 85 g (3.0 oz.) the player only Approx. 128 g (4.5 oz.) incl.

7、a premastered MD and a nickel metal hydride rechargeable battery NH-14WM 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) Approx. 21 hours* Approx. 31 hours Approx. 56

8、 hours* Design and specifications are subject to change without notice. Playback Ver 1.0 2000. 03 收音机爱好者资料库 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.9 5.ELECTRICAL ADJUSTMENTS. 14 6.DIAGRAMS 6-1.Block Diagram RF Section . 19 6-2.Block Diagra

9、m SERVO Section . 21 6-3.Block Diagram MAIN Section . 23 6-4.Printed Wiring Board MAIN Board (Component Side) . 25 6-5.Printed Wiring Board MAIN Board (Conductor Side) . 27 6-6.Schematic Diagram MAIN Board (1/4) . 29 6-7.Schematic Diagram MAIN Board (2/4) . 31 6-8.Schematic Diagram MAIN Board (3/4)

10、. 33 6-9.Schematic Diagram MAIN Board (4/4) . 35 6-10. Printed Wiring Board SYSTEM Board . 37 6-11. Schematic Diagram SYSTEM Board . 39 6-12. Printed Wiring Board SW Board . 41 6-13. Schematic Diagram SW Board . 43 6-14. IC Pin Function Description . 49 7.EXPLODED VIEWS. 56 8.ELECTRICAL PARTS LIST.

11、58 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED 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 PUB- LISHED BY

12、SONY. Features Small body almost the size of a MiniDisc jacket Ideal weight and size; fits in your shirt pocket. Personalized sound through Digital Sound Preset functions You can store two sets of sound quality adjustments (made during playback) to two switches. Low power-consumption design enables

13、extended battery life. Simple “One-Touch Eject” function for easy MiniDisc handling A single press of the OPEN button causes the player lid to open and the MiniDisc to eject. Easy-to-operate headphones remote control with backlit LCD The LCD displays disc and track information, playback mode as well

14、 as battery condition. Keep the main unit in your pocket and operate the MiniDisc player through the “slim stick” remote control. Shock-resistant memory offsets up to 40 seconds of optical read errors. 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

15、 diode in the optical pick-up block may suffer 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 wh

16、ich 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 lose your sight. NOTES ON HANDLING THE

17、OPTICAL PICK-UP BLOCK (LCX-2E) The laser diode 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. T

18、he flexible board is easily damaged and should be handled with care. OPTICAL PICK-UP FLEXIBLE BOARD SECTION 1 SERVICING NOTES When repairing this set with the power on, if you remove the upper panel assy, this set stops working. In this case, you can work without the set stopping by fastening the ho

19、ok of the open/close detect switch (SW board (S809) 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

20、the new EEPROM. After EEPROM (IC802) is replaced, digital sound preset set- ting value for display is changed to “00”. Please make sure to check that digital sound preset setting value for display is “01”. (Refer to page 14) Replacement of CXD2661GA-2 (IC601) and CXR701080- 010GA (IC801) used in thi

21、s set requires a special tool. There- fore, they cannot be replaced. SW board (S809) laser-tap 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 conductor of the circuit board (within 3 times). Be

22、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 controls or adjustments or performance of procedures o

23、ther than those specified herein may result in hazardous ra- diation exposure. 收音机爱好者资料库 Ra d i o Fa n s .CN 4 SECTION 2 GENERAL 1OPR indicator 2HOLD switch 3/B and . keys 4x key 5DIGITAL SOUND PRESET switch 6AVLS switch 7Battery cover 8VOLUME +/ keys 9External battery terminal 0OPEN button qa i (he

24、adphone) jack LOCATION OF CONTROLS Remote commander with headphones 9 3 8 7 6 4 21 qa 0 5 1Headphone 2B and . keys 3VOL +/ keys 4Display window 5DISPLAY key 6PLAYMODE key 7X key 8HOLD switch 9x key 8765 4 321 9 5 LID ASSY, UPPER HOLDER ASSY Note: This set can be disassemble according to the followin

25、g sequence. SECTION 3 DISASSEMBLY Holder AssyMechanism Deck (MT-MZE90-166) Service Assy, OP (LCX-2E) Panel Assy Bottom “Chassis Assy, set”, “Case, Battery”, MAIN board, SW board Lid Assy, UpperSet strip, ornamental 3two screws (MI1.4) 3two screws (MI1.4) 4lid assy, upper 2 1 3holder assy 1shaft 2sha

26、ft 6 MECHANISM DECK (MT-MZE90-166) PANEL ASSY, BOTTOM 2screw (MD) 5claw 3claw 1seal (moire) 5claw 7flexible board (CN501) 8flexible board (CN551) 9mechanism deck (MT-MZE90-166) 6 4 Note: When installing, fit three knobs. 2two screws (MI1.4) 2two screws (MI1.4) 3panel assy, bottom 2screw (M1.4) knob

27、1 7 STRIP, ORNAMENTAL 2lid, battery case 1claw 5claw 4claw 3claw 8strip, ornamental 9button (open) 7 6 strip, ornamental “CHASSIS ASSY, SET”, “CASE, BATTERY”, MAIN BOARD, SW BOARD 9chassis assy, set 8terminal (plus) assy, battery 8terminal board (minus) 5SW board 6case, battery 7screw (MI1.4) 1four

28、screws (M1.4) 4MAIN board 2flexible board (CN802) 3Remove the solder of terminal (plus) assy, battery. 3Remove the solder of terminal board (minus). flexible board 8 SERVICE ASSY, OP (LCX-2E) 4screw (M1.4) 5service assy, OP (LCX-2E) 3screw (M1.4) 1washer 2gear (SA) 9 2 In the normal mode, turn on th

29、e HOLD switch on the set. While pressing thexkey on the set, press the following remote commander keys in the following order: N tN t.t.tN t .t N t.tXtX SECTION 4 TEST MODE Operation in Setting the Test Mode When the test mode becomes active, first the display check mode is selected. (Press thexkey

30、once, when the display check mode is not active) Other mode can be selected from the display check mode. When the test mode is set, the LCD repeats the following dis- play. LCD display When theXkey is pressed and hold down, the display at that time is held so that display can be checked. Releasing t

31、he Test Mode For test mode set with the method 1: Turn off the power and open the solder bridge on BP801 (TEST) on the SYSTEM board. Note: Remove the solders completely. Remaining could be shorted with the chassis, etc. For test mode set with the method 2: Turn off the power. Note: If electrical adj

32、ustment (see page 14) has not been finished com- pletely, always start in the test mode. (The set cannot start in nor- mal mode) SYSTEM BOARD (Component Side) BP801 (TEST) Outline This set provides the Overall adjustment mode that allows CD and MO discs to be automatically adjusted when in the test

33、mode. In this overall adjustment mode, the disc is discriminate between CD and MO, and each adjustment is automatically executed in order. If a fault is found, the system displays its location. Also, the manual mode allows each individual adjustment to be auto- matically adjusted. Operation in the t

34、est mode is performed with the remote com- mander. A key having no particular description in the text, indi- cates a remote commander key. Setting Method of Test Mode There are two different methods to set the test mode: 1 Short BP801 (TEST) on the SYSTEM board with a solder bridge (connect pin y; o

35、f IC801 to the ground). Then, turn on the power. Microprocessor version display All off All lit F1SHUF REC888 004 V1.600 u 10 Configuration of Test Mode Manual Mode Mode to adjust or check the operation of the set by function. Normally, the adjustment in this mode is not executed. However, the Manua

36、l mode is used to clear the memory before performing automatic adjustments in the Overall Adjustment mode. Transition method in Manual Mode 1.Setting the test mode. (See page 9) 2.Press the VOL + key activates the manual mode where the LCD display as shown below. 3.During each test, the optical pick

37、-up moves outward or in- ward while theN or.key is pressed for several seconds respectively. 4.Each test item is assigned with a 3-digit mode number; 100th place is a major item, 10th place is a medium item, and unit place is a minor item. Manual Mode Servo Mode Audio Mode Power Mode OP Alignment Mo

38、de Overall Adjustment Mode Self-Diagnosis Display Mode Press the VOL + key Key Check Mode Test Mode $Display Check Mode% Press the x key Press the x key Press the x key Press the . or VOL - key press the DISPLAY key Press the DISPLAY key for several seconds (about 3 seconds). Quit the key check or o

39、pen the upper panel LCD display 000 M a n u a l VOL + key:100th place of mode number increase. VOL - key:100th place of mode number decrease. Major item switching VOL + key:10th place of mode number increase. VOL - key:10th place of mode number decrease. VOL + key:Increases the adjusted value VOL -

40、key:Decreases the adjusted value Medium item switching N key N key x key Minor item switching Adjusted value variation X key:When adjusted value is changed: Adjusted value is written. When adjusted value is not changed: That item is adjusted automatically. Adjusted value write N key: Unit place of m

41、ode number increase. x key 11 Self-Diagnosis Display Mode This set uses the self-diagnosis system in which if an error oc- curs in playback mode, the error is detected by the model con- trol and power control blocks of the microprocessor and infor- mation on the cause is stored as history in EEPROM.

42、 By viewing this history in test mode, it helps you to analyze a fault and determine its location. 1. Setting the test mode. (See page 9) 2. In the display check mode, press the DISPLAY key activates the self-diagnosis display mode where the LCD display as shown below. 3. Then, each time theN key is

43、 pressed, LCD display de- scends by one as shown below. Also, the LCD display ascends by one when the.key is pressed. 4. Quit the self-diagnosis display mode, and press thexkey to return to the test mode (display check mode). 5.The display changes a shown below each time the DISPLAY key is pressed.

44、However in the power mode (mode number 700s), only the item is displayed. 6.Quit the manual mode, and press thexkey to return to the test mode (display check mode). Overall Adjustment Mode Mode to adjust the servo automatically in all items. Normally, automatic adjustment is executed in this mode at

45、 the repair. For further information, refer to “Section 5 Electrical Adjustments”. (See page 14) Address , qa (IY, IX, JX, JY) (PLAYBACK mode) 100 mV/DIV, 5 s/DIV 3 IC501 ed (RF OUT), IC601 uk (RFI) (PLAYBACK mode) 500 mV/DIV, 10 s/DIV 4 IC501 rs (FE), IC601 ij (FE) (PLAYBACK mode) 100 mV/DIV, 1 s/D

46、IV 6 IC504 5, 6, IC505 1, 2, 5, 6, IC551 1, 2, rk (V1, U1, W1) IC601 zxm, zx, zx. (SPDU, SPDV, SPDW) (PLAYBACK mode) 1 V/DIV, 5 ms/DIV 7 IC551 ef, eg, eh (COW0, COV0, COU0) IC601 zc/, zcz, zcx (SPCU, SPCV, SPCW) (PLAYBACK mode) 1 V/DIV, 5 ms/DIV 8 IC601 w; (OSCO) 500 mV/DIV, 20 ns/DIV 9 IC901 rd (CL

47、K) 1 V/DIV, 2 s/DIV Approx. 12 mVp-p Approx. 140 mVp-p Approx. 1.2 Vp-p Approx. 10 mVp-p 5 IC504 1, 2, IC551 3 (PWM1), IC601 /N, .,VOL +/ keys input) 87SET KEY 2ISet switch (S806) input terminal (A/D input) (DIGITAL SOUND PRESET switch input) 88NCINot used (fixed at “H”) 89VRM MONIVREM voltage monitor input terminal (A/D input) 90NCINot used (fixed at “L”) 91AD GNDGround terminal