Mitsubishi-DD6000-dvd-sm 电路图 维修手册.pdf

《Mitsubishi-DD6000-dvd-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Mitsubishi-DD6000-dvd-sm 电路图 维修手册.pdf（71页珍藏版）》请在收音机爱好者资料库上搜索。

1、MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC. 9351 Jeronimo Rd. Irvine, CA 92618 Copyright 2000 Mitsubishi Digital Electronics America, Inc. All Rights Reserved Operating conditions:Temperature: 5C to 35C Operation status:Horizontal Video output:1.0 V (p-p), 75, negative sync., pin jack x 1 S Video o

2、utput:(Y) 1.0 V (p-p), 75, nega- tive sync., Mini DIN 4-pin x 1 (C) 0.286 V (p-p), 75 Color Difference outputs: (Y) 1.0 V (p-p), 75, (1 Interlaced)negative sync., pin jack x 1 (1 Progressive)(Cr, Pr)/(Cb, Pb) 0.7 V (p-p), 75, pin jack x 2 Digital Audio output:(Bitstream/PCM) 0.5 V (p-p), 75, pin jac

3、k x 1, Optical connector x 1 Analog Audio output:2.0 V (rms), 220, pin jack 2 CH L R x 2, 5.1 CH SURROUND x 6 CAUTION Before servicing this chassis, it is important that the service person reads all SAFETY PRECAUTIONS and the SAFETY NOTICE in this manual. SPECIFICATIONS Power Supply:120V AC, 60 Hz P

4、ower Consumption:19W Weight:6.8 lb. External Dimensions:17x 3-1/4x12-1/4 (W/H/D) Signal System:Standard NTSC Laser:Semiconductor laser, wavelength 650 nm Frequency Range:(Digital Audio) Audio CD:4 Hz to 20 kHz DVD Linear - 48 kHZ Sampling:4 Hz to 22 kHz 96 kHZ Sampling:4 Hz to 44 kHz Signal-To-Noise

5、 Ratio:More than 112 dB (EIAJ) Audio Dynamic Range: More than 106 dB (EIAJ) Harmonic Distortion:Less than 0.001% Wow and flutter:Below measurable level (less than 0.001% (W.PEAK) (EIAJ) ? ? 2000 MITSUBISH ELECTRIC Model DD-6000 DVD Player OPEN/CLOSE STOPPLAYPAUSE/STEP POWER DD-6000 STANDBY SKIP REVF

6、WD / / CDVD TITLETRK CHPTOTAL REMAINMEMORY HDCD This service manual contains the differences between models DD-5000 and DD-6000. It also includes information for the DD-6000 that is identical to the DD-5000. RadioFans.CN 收音机爱 好者资料库 SAFETY PRECAUTIONS LEAKAGE CURRENT CHECK Plug the AC line cord direc

7、tly into a 120V AC outlet (do not use an isolation transformer for this check). Use an AC voltmeter, having 5000 per volt or more sensitivity. Connect a 1500 10 W resistor, paralleled by a 0.15 F 150V AC capacitor between a known good earth ground (water pipe, conduit, etc.) and all exposed metal pa

8、rts of the cabinet (antennas, handle bracket, metal cabinet screwheads, metal overlays, control shafts, etc.). Measure the AC voltage across the 1500 resistor. The test must be conducted with the AC switch on and then repeated with the AC switch off. The AC voltage indicated by the meter may not exc

9、eed 0.3 V. A reading exceeding 0.3 V indicates that a dangerous potential exists, the fault must be located and corrected. Repeat the above test with the DVD VIDEO PLAYER power plug reversed. NEVER RETURN A DVD VIDEO PLAYER TO THE CUSTOMER WITHOUT TAKING NECESSARY CORRECTIVE ACTION. READING SHOULD N

10、OT EXCEED 0.3V DVD VIDEO PLAYER AC VOLTMETER (5000 ? per volt or more sensitivity) Good earth ground such as a water pipe, conduit, etc.1500 ? 10 W 0.15 F 150V AC AC OUTLET Test all exposed metal. Voltmeter Hook-up for Leakage Current Check RadioFans.CN 收音机爱 好者资料库 LASER BEAM CAUTION LABEL When the p

11、ower supply is on, do not remove this laser caution label. If it is removed, laser radiation may be recceived. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the products enclosure tha

12、t may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. SAFETY

13、NOTICE RadioFans.CN 收音机爱 好者资料库 SECTION 2 PART REPLACEMENT AND ADJUSTMENT PROCEDURES SECTION 3 SERVICING DIAGRAMS 1. CIRCUIT SYMBOLS AND SUPPLEMENTARY EXPLANATION 1-1. Precautions for Part Replacement 1-2. Solid Resistor Indication 1-3. Capacitance Indication 1-4. Inductor Indication 1-5. Waveform an

14、d Voltage Measurement 1-6. Others 1-7. When Replaced ROM ICs or Upgraded Firmwareo 2. PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM 3. BLOCK DIAGRAMS 3-1. Overall Block Diagram 3-2. Main Block Diagram 3-2-1. Logical System Block Diagram 3-3. Output Block Diagram 4. CIRCUIT DIAGRAMS 4-1. Output Circuit

15、Diagram 4-2. Sub Video Circuit Diagram CONTENTS SECTION 1 GENERAL DESCRIPTIONS SECTION 4 PARTS LIST SAFETY PRECAUTION NOTICE ABBREVIATIONS 1. Integrated Circuit (IC) 2. Capacitor (Cap) 3. Resistor (Res) 4. EXPLODED VIEWS 4-1. Packing Assembly 4-2. Chassis Assembly 4-3. Mechanism Assembly 5. PARTS LI

16、ST General descriptions such as preparation for servicing, location of mechanical parts and troubleshooting are the same as model DD-5000. The pages from model DD-5000, Section 1, are included in this text. Part replacement and adjustment procedures are the same as DD-5000. The pages from model DD-5

17、000, Section 2, are included in this text. 1-1 SECTION 1 General Descriptions 1. PREPARATION FOR SERVICING The Pickup Head consists of a laser diode that is very susceptible to external static electricity. Although it may operate properly after replacement, if subjected to electrostatic discharge du

18、ring replacement, its life may be shortened. When replacing the laser diode, LSIs and ICs, use a conductive mat, soldering iron with ground wire, etc. to protect against damage from static electricity. 1M Ground conductive wrist strap for body. Soldering iron with ground wire or ceramic type Conduct

19、ive mat The ground resistance between the ground line and the ground is less than 10. Fig. 1-1-1 1-2 2. LOCATION OF MAIN PARTS AND MECHANISM PARTS 2-1. Location of Main Parts Fig. 1-2-1 EU05 Output PC board Feed motor PC board EU03 Front display PC boardLoading motor PC board Disc motor PC board EU0

20、4 Power SW PC board EU01 Main PC board EU02 Power supply PC board 1-3 2-2. Location of Mechanism Parts Fig. 1-2-2 Mechanism chassis assembly (Top side) Fig. 1-2-3 Mechanism chassis assembly (Bottom side) Tray Clamper stay Loading motor PC board Mechanism chassis 1-4 Fig. 1-2-4 Mechanism chassis asse

21、mbly (Internal side) Loading belt Loading motor Kick lever Cam Slider Gear Gear Gear Disc motor 1-5 Fig. 1-2-5 Pickup mechanism chassis assembly (Top side) Fig. 1-2-6 Pickup mechanism chassis assembly (Bottom side) Front damper Rack gear assembly Gear A Gear B assembly Front damper Sub chassis Rear

22、damper Pickup assembly Rear damper Feed motor Feed motor PC board 1-6 3. TROUBLESHOOTING 3-1. Main Circuit 3-1-1. Servo System (1) Initial Operation after Power ON Power ON Send each LSI hard RST command and initial command. Pickup head is positioned at transmission initial position. Is tray closed?

23、 Pin 5 of CN502, TCLS=L Disc presence/absence and disc judgement Is a disc present? DVD or CD initial setting. DVD single Initial setting. DVD dual Initial setting. CD Initial setting. To each disc playback process. DVD single (single-layer) DVD single (single-layer)/DVD dual (dual-layer)/CD? CD DVD

24、 dual (dual-layer) 1 Tray close operation Pin 6 of IC601: LDMP = H/L Pin 7 of IC601: LDMN = L Is tray closed? Pin 5 of CN502: TCLS = L Y N Tray stops. Pin 6 of IC601: LDMP = H Pin 7 of IC601: LDMN = L Laser OFF Display: INSERT DISC Monitor screen: NO DISC Y Y NG N N 2 Fig. 1-3-1 H 1-7 Pickup (P.U.)

25、transmission initial operation does not occur. The pickup transmission initial operation is carried out to determine the initial position by transmitting the pickup to the innermost position once (start-limit switch (pin 4 of CN503) develops L.) and to the external direction at low speed (start-limi

26、t switch develops H, turning off the switch.). 1 Does pulse of 1.65V 1.65V develop at pin 162 of IC502? Check BUS between IC502 and IC601 and oscillation. Check feed gear. N Y 2-1 No disc misjudgement display of disc presence. Does lens move with UP/DOWN full stroke in focus direction? Is laser curr

27、ent normal? Check IC502. Does search signal output at both edges of focus coil? (Pins 10 to 13 of CN501) Does focus search voltage of 1.65V 0.4V develop at pin 1 of IC504 (E597)? Check pickup head and wiring. Does SBAD signal develop more than 0.3V? Check IC501. Lens cleaning. Replace pickup head. C

28、heck peripheral circuit of IC601. Check IC505. Y Y Y Y 3 N N N Y N N Fig. 1-3-2 Fig. 1-3-3 1-8 Disc kind misjudgement (Initial setting is NG.) Replace pickup head. Lens cleaning. Check IC501. Are FE and SBAD signals for each disc normal? Check peripheral circuit of IC601. 2-2 Y N Check laser current

29、. Check laser current. 50 mA lop 90 mA Check pins 14, 15 and 16 of IC501 serial bus. Check peripheral circuits of IC501, Q501 and Q502. lop = Voltage between E522 and E523/3.3 Replace pickup mechanism. Check wiring for pickup head. Check peripheral circuits of IC501, Q501 and Q502. lop 90 mAlop 50 m

30、A 3 Y Fig. 1-3-4 Fig. 1-3-5 DVD single (single-layer) disc detection waveform FE signal Pin150 (TP504) of IC502 SBAD signal Pin152 (TP506) of IC502 1.65V V : 500 mV/div H : 2 ms/div DVD dual (dual-layer) disc detection waveform V : 500 mV/div H : 2 ms/div CD disc detection waveform V : 500 mV/div H

31、: 2 ms/div Fig. 1-3-6Fig. 1-3-7Fig. 1-3-8 1-9 Disc motor (D.M.) forced accelleration (500 ms) Focus search PLAY Is forcus servo ON? CLV servo ON. Tracking balance adjustment Tracking servo ON. Focus gain adjustment Tracking gain adjustment Focus balance adjustment RF gain adjustment Repeat three tim

32、es. Is address code possible to read? Search Picture appears. Does NG continue more than 3 s.? Disc playback NG 4 2-15 4 6 Y N N Y Y : Automatic adjustment is carried out when a disc is replaced after power ON. N N N Y Y N N Y Y Fig. 1-3-9 (2) Picture appears (PLAY) 1-10 4 Disc motor (D.M.) does not

33、 rotate. Does pin 117 of IC502 (TP511) PLCK oscillate around 10 MHz ? Check peripheral circuit of IC503. Check peripheral circuits of IC510 and IC503. Check disc motor and wiring. N Y Focus servo is NG. Are FE, SBAD, FSON signals normal? Check peripheral circuit of IC601. Do signals output to pins 4

34、 to 9 of CN501? Check IC501. Check wiring for pickup head. Lens cleaning. Replace pickup mechanism. Y Y N N 5 FE signal Pin 150 (TP504) of IC502 SBAD signal Pin 152 (TP506) of IC502 0.3V 1.65V 0.3V Focus searchFocus servo on Focus servo ON signal waveform Fig. 1-3-10 Fig. 1-3-11 Fig. 1-3-12 1-11 Tra

35、cking servo is NG. Is TE signal normal? Check peripheral circuit of IC601. Check IC501. 6 Y N Signal waveform at tracking servo ON (CD) TE signal Pin 151 (TP503) of IC502 1.65V RFRP signal Pin 153 (TP501) of IC502 Search ON (SRCH) Pin 38 (TP508) of IC502 ON searchTracking servo on Signal waveform at

36、 tracking servo ON (DVD) Fig. 1-3-13 Fig. 1-3-14 Fig. 1-3-15 1-12 Disc playback is NG (DVD). Is PLL locked? (Refer to waveforms.) Check signal process system following to IC503. Check peripheral circuits of IC502 and IC601. Does pulse of L = 1.65V and H = 3.3V develop at pin 131 and L = 0V and H = 1

37、.65V develop at pin 132 of IC502? Does RF output higher than 1.5 V(p-p) develop at pin 45 (TP515) of IC501 ? Check IC501. Lens cleaning. Pickup mechanism replacement Check peripheral circuits of IC502 and IC601. Pin 57 of IC501 = 2.4V Pin 58 of IC501 = 3.0V Check peripheral circuits of IC501and IC50

38、2. 7 Y N N N N Y Y Y DVD RF signal Pin 45 (TP515) of IC501 V : 500 mV/div H : 50 ns/div DVD RF signal DVD RF signal Pin 45 (TP515) of IC501 DVD PLCK Pin 117 (TP511) of IC502 CH1 : TP515 DVDRF 500 mV/div CH2 : TP511 DVDPLCK 5 V/div 50 ns/div DVD playback waveform CD RF signal Pin 45 (TP515) of IC501

39、V : 500 mV/div H : 100 ns/div CD RF signal CD RF signal Pin 45 (TP515) of IC501 CD PLCK Pin 117 (TP511) of IC502 CH1 : TP515 CDRF 500 mV/div CH2 : TP511 CDPLCK 5 V/div 100 ns/div CD playback waveform Fig. 1-3-16 Fig. 1-3-17 Fig. 1-3-19 Fig. 1-3-18 Fig. 1-3-20 PLL works as a servo loop to generate a

40、clock signal for reading RF signal binary data. With the PLL locked, the eye pattern is identified clearly when triggered with the read clock PLCK. 1-13 Fig. 1-3-21 3-1-2. Location Diagram of Servo Test Point E523 E522 TP515 RF TP507 FSON TP508 SRCH TP501 RFRP TP506 RFSB (SBAD) TP509 VMCK (23MHz) TP

41、503 TETP504 FE TP505 VREF TP511 PLCK IC504 IC501 IC502 IC305 IC601 CN602 CN502 CN503 CN501CN801 CN901 CN301 IC502 E594 DMDRV E595 FMDRV E596 TRDRV E597 FODRV 1-14 This page is not printed. 2-1 SECTION 2 PART REPLACEMENT AND ADJUSTMENT PROCEDURES CAUTIONS BEFORE STARTING SERVICING Electronic parts ar

42、e susceptible to static electricity and may easily damaged, so do not forget to take a proper ground- ing treatment as required. Many screws are used inside the unit. To prevent missing, dropping, etc. of the screws, always use a magnetized screwdriver in servicing. Several kinds of screws are used

43、and some of them need special cautions. That is, take care of the tapping screws securing molded parts and fine pitch screws used to secure metal parts. If they are used improp- erly, the screw holes will be easily damaged and the parts can not be fixed. 1. REPLACEMENT OF MECHANICAL PARTS 1-1. Cabin

44、et Replacement 1-1-1. Top Cover 1. Remove five screws (1) and remove the top cover (2). Fig. 2-1-1 1-1-2. Clamper Stay 1. Remove two screws (1). 2. Release two claws and remove the clamper stay (2). Fig. 2-1-2 Screw (1) Screw (1) Top cover (2) Screws (1) Clamper stay (2) Clamper stay (2) Claw Claws

45、Spring Screws (1) Clamper stay (2) Claw A 2-2 1-1-3. Tray Panel 1. Slide the slider (2) of the mechanism chassis assem- bly (1) with a screwdriver, etc. in the arrow direction, so that the tray (3) is ejected. Note: Take care not to damage the pickup and other parts. Fig. 2-1-4 1. Eject the tray (3)

46、. 2. Twist the tray panel (4) a little in the arrow A direction with the tray (3) hold by hand to release two claws and lift up the tray panel (4) in the arrow B direction, then the tray panel (4) is removed. (Refer to Fig. 2-1-5.) 3. When mounting the tray panel (4), insert the tray panel (4) along

47、 the grooves of the both sides of the tray (3) until clicking. OK Tray NG Spring Mechanism chassis assembly NG This part should be touch to the left side of the tray. OK NG Press down by finger unitil fix the clamper assembly No floating Floating NG 1. The spring for tray side pressure is inserted i

48、nto the portion “A”. (Refer to Fig. 2-1-2.) 2. By referring to Fig. 2-1-3, insert the spring normally and mount the clamper stay. Fig. 2-1-3 Screw driver Mechanism chassis assembly (1) Tray (3) Front panel Slider (2) 2-3 Slider Pickup mechanism assembly Tray (3) Gear (4) Gear (4) Gear (4) Marking Ra

49、ck gear Triangle mark Position of the line Figure A Figure B The first tooth of the gear of this side on the tray rack gear. Fig. 2-1-5 1-1-4. Front Panel and Tray 1. Remove the flexible cable (1). 2. Release four claws and remove the front panel (2). 3. Pull out the tray (3) to this side. Fig. 2-1-6 Note: Insert the tray (3) with the front side of the pickup mechanism assembly descended. (The slider posi- tions to the left side.) The gears are required to match their phases each other. After setting the gear (4) as shown in the