Hitachi-DVP755U-cd-sm 维修电路原理图.pdf

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1、SERVICE MANUALSERVICE MANUALDVD PLAYERDVD PLAYERSPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTTKNo. 0501ETKNo. 0501E2005Digital Media Division, YokohamaAprilDO NOT RESELL OR DIVERT IMPROPERLY.DO NOT RESELL OR DIVERT IMPROPERLY.DV-P755UDV-P755URadioFans.CN 收音机爱 好者资料库CONTENTS1 CAUTION

2、FOR SAFETY IN PERFORMING REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11-1 LASER BEAM SAFETY PRECAUTIONS . . . . . . . . .1-11-2 IMPORTANT SAFETY PRECAUTIONS . . . . . . . . . .1-21-2-1 Product Safety Notice . . . . . . . . . . . . . . . . . . . . .1-21-2-2 Precautions durin

3、g Servicing . . . . . . . . . . . . . . . .1-21-2-3 Safety Check after Servicing . . . . . . . . . . . . . . . .1-31-3 STANDARD NOTES FOR SERVICING . . . . . . . . . .1-41-3-1 Circuit Board Indications . . . . . . . . . . . . . . . . . . .1-41-3-2 Instructions for Connectors . . . . . . . . . . . .

4、. . . . .1-41-3-3 Pb (Lead) Free Solder . . . . . . . . . . . . . . . . . . . . .1-41-3-4 Instructions for Handling Semi-conductors . . . . .1-42 GENERAL INFORMATION . . . . . . . . . . . . . . . .2-12-1 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . .2-12-2 COMPARISON OF MODELS .

5、 . . . . . . . . . . . . . . . . .2-22-3 COMPARISON OF MAIN CONTROL ICS . . . . . . . .2-32-4 LIST OF ABBREVIATIONS AND TERMS FOR DVD PLAYER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-42-5 OPERATING CONTROLS AND FUNCTIONS . . . . .2-53 MAINTENANCE AND INSPECTION . . . . .

6、. . . .3-13-1 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . .3-13-2 HOW TO INITIALIZE THE DVD PLAYER. . . . . . . . .3-73-3 FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . .3-83-3-1 How to Update the Firmware Version . . . . . . . . .3-83-3-2 How to Verify the Firmware Version. . .

7、 . . . . . . . .3-94 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . .4-14-1 CABINET DISASSEMBLY INSTRUCTIONS. . . . . . .4-14-1-1 Disassembly Flowchart . . . . . . . . . . . . . . . . . . . .4-14-1-2 Disassembly Method . . . . . . . . . . . . . . . . . . . . . .4-14-1-3 How to Eject Man

8、ually . . . . . . . . . . . . . . . . . . . . .4-35 EXPLODED VIEW AND PARTS LIST . . . . . . . 5-15-1 EXPLODED VIEW. . . . . . . . . . . . . . . . . . . . . . . . . . .5-15-2 REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . .5-25-2-1 Mechanical Parts List . . . . . . . . . . . . . . . . . . .

9、. . .5-25-2-2 Electrical Parts List. . . . . . . . . . . . . . . . . . . . . . . .5-36 APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16-1 SYSTEM CONTROL TIMING CHARTS . . . . . . . . . .6-16-2 IC PIN FUNCTION DESCRIPTIONS. . . . . . . . . . . . .6-26-3 LEAD IDENTIFICATIONS . . .

10、 . . . . . . . . . . . . . . . . . .6-3S SCHEMATIC, WIRING DIAGRAMS. . . . . . . . . S-1S-1 Schematic Diagrams / CBAs and Test Points . . . . S-1S-2 Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-3S-3 DVD Main 1/3 Schematic Diagram . . . . . . . . . . . . . S-4S-4 DVD Main

11、2/3 Schematic Diagram . . . . . . . . . . . . . S-5S-5 IC101 Voltage Chart . . . . . . . . . . . . . . . . . . . . . . . . S-6S-6 DVD Main 3/3 Schematic Diagram . . . . . . . . . . . . . S-7S-7 AV 1/3 Schematic Diagram . . . . . . . . . . . . . . . . . . . S-8S-8 AV 2/3 Schematic Diagram . . . . . .

12、 . . . . . . . . . . . . . S-9S-9 AV 3/3 & Function Schematic Diagram. . . . . . . . . S-10S-10 Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-11C CIRCUIT BOARD DIAGRAMSC-1 AV CBA Top View. . . . . . . . . . . . . . . . . . . . . . . . . . C-1C-2 AV CBA Bottom View . . . . . .

13、 . . . . . . . . . . . . . . . . . C-2C-3 Function CBA Top/Bottom View . . . . . . . . . . . . . . . C-3B BLOCK DIAGRAMSB-1 System Control/Servo Block Diagram. . . . . . . . . . . B-1B-2 Digital Signal Process Block Diagram. . . . . . . . . . . B-2B-3 Video/Audio Block Diagram. . . . . . . . . . . .

14、 . . . . . . . B-3B-4 Power Supply Block Diagram . . . . . . . . . . . . . . . . . B-4RadioFans.CN 收音机爱 好者资料库1-11-1 LASER BEAM SAFETY PRECAUTIONSThis DVD player uses a pickup that emits a laser beam.The laser beam is emitted from the location shown in the figure. When checking the laser diode, be su

15、re to keep your eyes at least 30 cm away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.CAUTION: Use of controls and adjustments, or doing procedures other than those specified herein, may result in hazardous radiation exposure.Location: Top of DVD mechanism

16、.1CAUTION FOR SAFETY IN PERFORMING REPAIRDo not look directly at the laser beam coming from the pickup or allow it to strike against your skin.Drive Mechanism AssemblyLaser Beam RadiationLaser PickupTurntableLASER RADIATIONWHEN OPEN. DO NOTSTARE INTO BEAM.CAUTION1-21-2 IMPORTANT SAFETY PRECAUTIONS1-

17、2-1 Product Safety NoticeSome electrical and mechanical parts have special safety-related characteristics which are often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that

18、have special safety characteristics are identified by a # on schematics and in parts lists. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part might create shock, fire, and/or other hazards. The Products Safety is under review conti

19、nuously and new instructions are issued whenever appropriate. Prior to shipment from the factory, our products are carefully inspected to confirm with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it i

20、s equally important to implement the following precautions when a set is being serviced.1-2-2 Precautions during ServicingA. Parts identified by the # symbol are critical for safety. Replace only with part number specified.B. In addition to safety, other parts and assemblies are specified for confor

21、mance with regulations applying to spurious radiation. These must also be replaced only with specified replacements. Examples: RF converters, RF cables, noise blocking capacitors, and noise blocking filters, etc.C. Use specified internal wiring. Note especially:1) Wires covered with PVC tubing2) Dou

22、ble insulated wires3) High voltage leadsD. Use specified insulating materials for hazardous live parts. Note especially:1) Insulation tape2) PVC tubing 3) Spacers4) Insulators for transistorsE. When replacing AC primary side components (transformers, power cord, etc.), wrap ends of wires securely ab

23、out the terminals before soldering.F.Observe that the wires do not contact heat producing parts (heat sinks, oxide metal film resistors, fusible resistors, etc.).G. Check that replaced wires do not contact sharp edges or pointed parts.H. When a power cord has been replaced, check that 5 - 6 kg of fo

24、rce in any direction will not loosen it.I.Also check areas surrounding repaired locations.J.Be careful that foreign objects (screws, solder droplets, etc.) do not remain inside the set.K. Crimp type wire connector The power transformer uses crimp type connectors which connect the power cord and the

25、primary side of the transformer. When replacing the transformer, follow these steps carefully and precisely to prevent shock hazards.Replacement procedure1) Remove the old connector by cutting the wires at a point close to the connector. Important: Do not re-use a connector. (Discard it.)2) Strip ab

26、out 15 mm of the insulation from the ends of the wires. If the wires are stranded, twist the strands to avoid frayed conductors.3) Align the lengths of the wires to be connected. Insert the wires fully into the connector.4) Use a crimping tool to crimp the metal sleeve at its center. Be sure to crim

27、p fully to the complete closure of the tool.L.When connecting or disconnecting the internal connectors, first, disconnect the AC plug from the AC outlet.1-31-2-3 Safety Check after ServicingExamine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts, an

28、d wires have been returned to their original positions. Afterwards, do the following tests and confirm the specified values to verify compliance with safety standards.1. Clearance DistanceWhen replacing primary circuit components, confirm specified clearance distance (d) and (d) between soldered ter

29、minals, and between terminals and surrounding metallic parts. (See Fig. 1)Table 1: Ratings for selected areaNote:This table is unofficial and for reference only. Be sure to confirm the precise values.2. Leakage Current TestConfirm the specified (or lower) leakage current between B (earth ground, pow

30、er cord plug prongs) and externally exposed accessible parts (RF terminals, antenna terminals, video and audio input and output terminals, microphone jacks, earphone jacks, etc.) is lower than or equal to the specified value in the table below.Measuring Method (Power ON):Insert load Z between B (ear

31、th ground, power cord plug prongs) and exposed accessible parts. Use an AC voltmeter to measure across the terminals of load Z. See Fig. 2 and the following table.Table 2: Leakage current ratings for selected areasNote:This table is unofficial and for reference only. Be sure to confirm the precise v

32、alues.AC Line VoltageClearance Distance (d), (d)120 V 3.2 mm (0.126 inches)AC Line VoltageLoad ZLeakage Current (i)Earth Ground (B) to:120 V0.15 F CAP. & 1.5 k RES. Connected in paralleli 0.5 mA PeakExposed accessible partsChassis or Secondary ConductorddPrimary Circuit TerminalsFig. 1AC Voltmeter (

33、High Impedance)Exposed Accessible PartBEarth Ground Power Cord Plug ProngsZFig. 21-41-3 STANDARD NOTES FOR SERVICINGGeneral Note: CBA is an abbreviation forCircuit Board Assembly.1-3-1 Circuit Board Indications1.The output pin of the 3 pin Regulator ICs is indicated as shown.2.For other ICs, pin 1 a

34、nd every fifth pin are indicated as shown.3.The 1st pin of every male connector is indicated as shown.1-3-2 Instructions for Connectors1.When you connect or disconnect the FFC (Flexible Foil Connector) cable, be sure to first disconnect the AC cord.2.FFC (Flexible Foil Connector) cable should be ins

35、erted parallel into the connector, not at an angle.1-3-3 Pb (Lead) Free SolderWhen soldering, be sure to use the Pb free solder.1-3-4 Instructions for Handling Semi-conductorsElectrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electrostatic charge during

36、unpacking or repair work.1. Ground for Human BodyBe sure to wear a grounding band (1 M) that is properly grounded to remove any static electricity that may be charged on the body.2. Ground for WorkbenchBe sure to place a conductive sheet or copper plate with proper grounding (1 M) on the workbench o

37、r other surface, where the semi-conductors are to be placed. Because the static electricity charge on clothing will not escape through the body grounding band, be careful to avoid contacting semi-conductors with your clothing.Top ViewOutInBottom ViewInput510Pin 1Pin 1FFC CableConnectorCBA* Be carefu

38、l to avoid a short circuit.CBAGrounding BandConductive Sheet orCopper Plate1M1MCBA2-12-1 SPECIFICATIONS2GENERAL INFORMATIONItemDescriptionDVD sectionOutput signal formatNTSC colorVideo output impedance75 Video output level1.0 V p-pAudio output level2.0 VrmsVideo S/N ratio60 dB or moreDisc usedDVD vi

39、deo disc, Music CD discAudio frequency characteristicDVD (linear audio) 20 Hz - 22 kHz (48 kHz sampling frequency) 20 Hz - 44 kHz (96 kHz sampling frequency)Music CD 20 Hz - 20 kHz (JEITA)Signal/Noise (S/N) ratioCD: 70 dB (JEITA)Dynamic rangeDVD (linear audio): 70 dB, CD: 70 dB (JEITA)Total distorti

40、on ratioDVD: 0.004%, CD: 0.0045%TerminalVideo outputPIN JACKAudio outputPIN JACKComponent video outputPIN JACKS Video outputMINI DIN 4PIN JACK (75 )Coaxial digital audio output PIN JACKOthersPower supply120 V AC +/- 10%, 60 Hz +/- 0.5%Power consumption10 W (Standby: 0.8 W)Temperature range for opera

41、tion5 C - 40 CDimensions435(W) mm 51(H) mm 211(D) mmWeight1.3 kg2-22-2 COMPARISON OF MODELSO: Yes, -: No, : Same as on leftItemDV-P755UDV-P543UGENERALDVD/VCD/SVCD/CD-DAO / - / - / OCD-R/CD-RW/DVD-R (Video Format)O / O / ODVD-RAM/DVD-RW- / O (Video Mode)MP3/WMAO / - Drive Speed1xLaser2OSD languages3

42、(English, French, Spanish)Front Panel ColorSilver / BlackRemote Controller Model NameDV-RM755UDV-RM543UVIDEOVideo Out Mode NTSC/PAL/PAL60O / - / -S-Video / Component / CompositeO / O / OVideo D/A Converter10bit / 54MHzBlack Level SelectO Progressive OutO AUDIOAudio D/A Converter192kHz / 24bitDigital

43、 Audio Out Optical / Coaxial- / ODTS Digital OutO-Virtual SurroundODynamic Range Compression (Dolby Digital)OTRICK PLAYSearch Speed 2 to 100 (FORWARD/REWIND)(DVD: 2, 8, 20, 50, 100/CD: 2, 8, 30)2 to 100 (FORWARD/REWIND)(DVD: 2, 8, 50, 100/CD: 16)Slow Speed1/16, 1/8, 1/2 (FORWARD/REWIND)IP Search (Sm

44、ooth 2x Play)Ox1.3, x0.8 Play with AudioO-Step Forward / ReverseO / -Still Picture Select (Frame/Field)Frame / Field / AutoFEATURESDisc NavigationODVD Zoom x2 / x4 / x16O / O / -A-B RepeatO-RepeatOResumeOClosed Caption for NTSC DVDOFront Panel Display DimmerOScreen SaverOAuto Power OffO (always on)2

45、-32-3 COMPARISON OF MAIN CONTROL ICS-: No, : Same as on leftItemDV-P755UDV-P543USWSN74LVC1G3157DCKR (IC201)NC7SB3157P6X / SN74LVC1G3157DCKR (IC201)OP AMPLM324PWR / LM324PT (IC202)SERVO DRIVEBA5888FP-E2 / SA5694G / FAN8024CDTF-NL / SA5624G / SA5694 / FAN8024CDTF(IC301)SA5694 / FAN8024CDTF / BA5954FP-

46、E2 / BA5888FP-E2 (IC301)RESETPST3229NR (IC461)BMR-110529 (IC462)MICRO CONTROLLERMN35302 (IC101)MN35202 (IC101)SDRAMK4S641632H-UC75/P2V64S406TP-G6(IC503)K4S641632H-UC75 (IC503)FLASH ROMMBM29LV160BE90TN-KE1 / ES29LV160DB-90TG / M29W160EB70N6E-PBF / MX29LV160BBTC-90G(IC103)MBM29LB160T / BM90TN-K / MX29

47、LV160ABTC-90G (IC103)AUDIO D/A CONVERTERPCM1782DBQR (IC601)PCM1755DBQR (IC601)ERROR VOLTAGE DETEL817B / EL817C / LTV-817B-F / LTV-817C-F / PS2561A-1(W) (IC1001)EL817B / EL817C / LTV-817B-F / LTV-817C-F / PS2561A-1(W) / PS2561A-1(Q) (IC1001)1.2V REGLD1117SC-R(IC1002)PQ070XZ5MZP (IC1002)SHUNT REGULATO

48、RKIA431-AT / FAN431AZXA (IC1006)AMPKIA4558P/P/ UTC4558 / RC4580IP (IC1201)KIA4558P / NJM4558D / RC4580IP (IC1201)VIDEO DRIVERMM1622XJBE (IC1402)MM1637XVBE (IC1402)-MM1636XWRE (IC1403)FRONT PANEL CONTROLPT6313-S-TP(L) / SC16313G (IC2001)PT6313-S-TP / SC16313 (IC2001)2-42-4 LIST OF ABBREVIATIONS AND T

49、ERMS FOR DVD PLAYERIndexAbbreviation/TermExplanationAAC3See Dolby AC3.CCD-ROne type of DVD standard disc, to which writing once is possible (recordable type)CD-RWOne type of CD standard disc, to which writing up to 1000 times is possibleComponent video output terminalsUsed for outputs of HDTV video

50、signal format. Since signals for brightness and colors are independently handled for components signals (Y: luminance signal; PR/PB: chrominance signals), degrading of image will be reduced.DDolby AC3Audio coding format developed by Dolby Laboratories in U.S, also simply referred to as AC3 format: S