Hitachi-DVPF7E-cd-sm 维修电路原理图.pdf

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1、SERVICE MANUALSERVICE MANUALSPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENTSM0413SM04132004 Digital Media DivisionMayDO NOT RESELL OR DIVERT IMPROPERLY.DO NOT RESELL OR DIVERT IMPROPERLY.DVD PLAYER & VIDEO CASSETTE RECORDERDVD PLAYER & VIDEO CASSETTE RECORDERPALDV-PF7EDV-PF7E(UK)DV-PF

2、6EDV-PF7EDV-PF7E(UK)DV-PF6EDV-PF7EDV-PF7E(UK)DV-PF6ERadioFans.CN 收音机爱 好者资料库CONTENTS1 CAUTIONS FOR SAFETY IN PERFORMING REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11-1 LASER BEAM SAFETY PRECAUTIONS . . . . . . . 1-11-2 IMPORTANT SAFETY PRECAUTIONS . . . . . . . . 1-21-2-1 Pr

3、oduct Safety Notice . . . . . . . . . . . . . . . . . . . . 1-21-2-2 Precautions during Servicing . . . . . . . . . . . . . . 1-21-2-3 Safety Check after Servicing. . . . . . . . . . . . . . . 1-31-3 STANDARD NOTES FOR SERVICING. . . . . . . . . 1-41-3-1 Circuit Board Indications . . . . . . . . . .

4、 . . . . . . . . 1-41-3-2 Instructions for Connectors . . . . . . . . . . . . . . . . 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 . . . .

5、. . . . . . . . . . . . . . . . . . . . . 2-12-2 COMPARISON OF MODELS. . . . . . . . . . . . . . . . . 2-22-2-1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22-2-2 VCR Section . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22-2-3 DVD Section . . . . . . . . . . .

6、. . . . . . . . . . . . . . . . 2-32-3 COMPARISON OF MAIN CONTROL ICS. . . . . . . 2-42-4 LIST OF ABBREVIATIONS AND TERMS FOR DVD PLAYER . . . . . . . . . . . . . . . . . . . . . . . . 2-52-5 FUNCTION INDICATOR SYMBOLS . . . . . . . . . . . 2-62-6 OPERATING CONTROLS AND FUNCTIONS. . . . 2-73 MAINTEN

7、ANCE AND INSPECTION. . . . . . . . 3-13-1 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . 3-13-1-1 Power Supply Section . . . . . . . . . . . . . . . . . . . . 3-13-1-2 DVD Section . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43-1-3 VCR Section . . . . . . . . . . . . . . . . .

8、 . . . . . . . . . 3-123-2 FIRMWARE RENEWAL MODE. . . . . . . . . . . . . . 3-193-2-1 How to Update the Firmware Version . . . . . . . 3-193-2-2 How to Verify the Firmware Version . . . . . . . . 3-203-3 STANDARD MAINTENANCE. . . . . . . . . . . . . . . . 3-213-3-1 Service Schedule of Components. .

9、. . . . . . . . 3-213-3-2 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-224 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . 4-14-1 CABINET DISASSEMBLY INSTRUCTIONS . . . . . 4-14-1-1 Disassembly Flowchart . . . . . . . . . . . . . . . . . . . 4-14-1-2 Disassembly M

10、ethod. . . . . . . . . . . . . . . . . . . . . 4-14-1-3 How to Eject Manualy . . . . . . . . . . . . . . . . . . . . 4-54-2 DISASSEMBLY/ASSEMBLY PROCEDURES OF DECK MECHANISM . . . . . . . . . . . . . . . . . . . . 4-64-3 ALIGNMENT PROCEDURES OF MECHANISM. 4-155 ADJUSTMENT . . . . . . . . . . . . . .

11、 . . . . . . . . . . 5-15-1 PREPARATION FOR SERVICING. . . . . . . . . . . . . 5-15-1-1 How to Enter the Service Mode. . . . . . . . . . . . . 5-15-2 FIXTURE AND TAPE FOR ADJUSTMENT. . . . . . 5-25-2-1 How To Use The Fixtures And Tape . . . . . . . . . 5-25-3 ELECTRICAL ADJUSTMENT INSTRUCTIONS . . 5

12、-35-3-1 Test Equipment Required . . . . . . . . . . . . . . . . . 5-35-3-2 Head Switching Position Adjustment. . . . . . . . . 5-35-4 MECHANICAL ALIGNMENT PROCEDURES. . . . 5-45-4-1 Service Information . . . . . . . . . . . . . . . . . . . . . . 5-45-4-2 Tape Interchangeability Alignment . . . . . .

13、 . . . . 5-51-A. Preliminary/Final Checking andAlignment of Tape Path . . . . . . . . . . . . . . . . . . . 5-61-B. X Value Alignment. . . . . . . . . . . . . . . . . . . . . . . 5-61-C. Checking/Adjustment of Envelope Waveform . . 5-71-D. Azimuth Alignment ofAudio/Control/Erase Head. . . . . . . .

14、. . . . . . . . . 5-81-E. Checking and Alignment of Tape Path during reversing . . . . . . . . . . . . . . . . 5-86 EXPLODEDS VIEWS AND PARTS LIST . . . . 6-16-1 EXPLODED VIEWS. . . . . . . . . . . . . . . . . . . . . . . . 6-16-1-1 Cabinet Section. . . . . . . . . . . . . . . . . . . . . . . . . 6-

15、16-1-2 Deck Mechanism View 1 Section . . . . . . . . . . . 6-26-1-3 Deck Mechanism View 2 Section . . . . . . . . . . . 6-26-1-4 Deck Mechanism View 3 Section . . . . . . . . . . . 6-36-2 REPLACEMENT PARTS LIST. . . . . . . . . . . . . . . . 6-46-2-1 Mechanical Parts List . . . . . . . . . . . . . .

16、 . . . . . . 6-46-2-2 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . 6-67 APPENDIX. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-17-1 SYSTEM CONTROL TIMING CHARTS . . . . . . . . 7-17-2 IC PIN FUNCTION DESCRIPTIONS. . . . . . . . . . . 7-77-3 LEAD IDENTIFICATIONS . . .

17、. . . . . . . . . . . . . . . 7-10S SCHEMATIC, WIRING DIAGRAMSS-1 Schematic Diagrams/CBAs and Test Points . . . . . S-1S-2 Wiring Diagrams . . . . . . . . . . . . . S-3S-3 Wiring Diagrams . . . . . . . . . . . . . S-4S-4 Main 1/9 Schematic Diagram. . . . . . . . . . . . . . . . . S-5S-5 Main 2/9, Se

18、nsor & Power SW Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . S-6S-6 Main 3/9 Schematic Diagram. . . . . . . . . . . . . . . . . S-7S-7 Main 4/9 Schematic Diagram. . . . . . . . . . . . . . . . . S-8S-8 Main 5/9 Schematic Diagram. . . . . . . . . . . . . . . . . S-9S-9 Main 6/9 Sc

19、hematic Diagram. . . . . . . . . . . . . . . . S-10S-10Main 7/9 & DVD Open/Close Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . S-11S-11Main 8/9 Schematic Diagram. . . . . . . . . . . . . . . . S-12S-12Main 9/9 Schematic Diagram. . . . . . . . . . . . . . . . S-13S-13Power Supply &

20、Junction Schematic Diagrams . . S-14S-14Jack-A Schematic Diagram . . . . . . . . . . . . . . . . . S-15S-15AFV Schematic Diagram . . . . . . . . . . . . . . . . . . . S-16S-16DVD Main 1/3 Schematic Diagram. . . . . . . . . . . . S-17S-17DVD Main 2/3 Schematic Diagram. . . . . . . . . . . . S-18S-18I

21、C101 Voltage Chart. . . . . . . . . . . . . . . . . . . . . . . S-19S-19DVD Main 3/3 Schematic Diagram. . . . . . . . . . . . S-20S-20Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-21C CIRCUIT BOARD DIAGRAMSC-1 Main CBA Top View & Sensor CBA Top View . . . . C-1C-2 Main CBA B

22、ottom View . . . . . . . . . . . . . . . . . . . . . C-2C-3 Power SW CBA Top/Bottom View & DVD Open/Close CBA Top/Bottom View . . . . . . . . C-3C-4 Power Supply CBA Top/Bottom View & Junction CBA Top/Bottom View . . . . . . . . . . . . . . . C-4C-5 Jack-A CBA Top/Bottom View, Jack-B CBA Top/Bottom

23、View & AFV CBA Top/Bottom View . . . . . . . . . . . . . . . . . . C-5B BLOCK DIAGRAMSB-1 Servo/System Control Block Diagram . . . . . . . . . . B-1B-2 Video Block Diagram . . . . . . . . . . . . . . . . . . . . . . . B-2B-3 Audio Block Diagram . . . . . . . . . . . . . . . . . . . . . . . B-3B-4 Hi

24、-Fi Audio Block Diagram. . . . . . . . . . . . . . . . . . . B-4B-5 Power Supply Block Diagram. . . . . . . . . . . . . . . . . B-5B-6 DVD System Control/Servo Block Diagram . . . . . . B-6B-7 Digital Signal Process Block Diagram . . . . . . . . . . B-7B-8 DVD Video / Audio Block Diagram. . . . . .

25、. . . . . . . B-8iRadioFans.CN 收音机爱 好者资料库1-1Drive Mecha AssemblyLaser Beam RadiationLaser PickupTurntable1-1 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 sure toke

26、ep your eyes at least 30cm away from the pickup lens when the diode is turned on. Do not look directly at thelaser beam.Caution: Use of controls and adjustments, or doing procedures other than those specified herein, may result inhazardous radiation exposure.Do not look directly at the laser beam co

27、mingfrom the pickup or allow it to strike againstyour skin.CAUTION FOR SAFETY IN PERFORMING REPAIR11-21-2 IMPORTANT SAFETY PRECAUTIONS1-2-1 Product Safety NoticeSome electrical and mechanical parts have specialsafety-related characteristics which are often not evi-dent from visual inspection, nor ca

28、n the protectionthey give necessarily be obtained by replacing themwith components rated for higher voltage, wattage,etc. Parts that have special safety characteristics areidentified by a ! on schematics and in parts lists.Use of a substitute replacement that does not havethe same safety characteris

29、tics as the recommendedreplacement part might create shock, fire, and/orother hazards. The Products Safety is under reviewcontinuously and new instructions are issued when-ever appropriate. Prior to shipment from the factory,our products are carefully inspected to confirm withthe recognized product

30、safety and electrical codes ofthe countries in which they are to be sold. However, inorder to maintain such compliance, it is equally impor-tant to implement the following precautions when aset is being serviced.1-2-2 Precautions during ServicingA. Parts identified by the ! symbol are critical forsa

31、fety. Replace only with part number specified.B. In addition to safety, other parts and assembliesare specified for conformance with regulationsapplying to spurious radiation. These must also bereplaced only with specified replacements.Examples: RF converters, RF cables, noise block-ing capacitors,

32、and noise blocking filters, etc.C. Use specified internal wiring. Note especially:1)Wires covered with PVC tubing2)Double insulated wires3)High voltage leadsD. Use specified insulating materials for hazardouslive parts. Note especially:1)Insulation tape2)PVC tubing 3)Spacers4)Insulators for transist

33、orsE. When replacing AC primary side components(transformers, power cord, etc.), wrap ends ofwires securely about the terminals before solder-ing.F. Observe that the wires do not contact heat produc-ing parts (heatsinks, oxide metal film resistors, fus-ible resistors, etc.).G. Check that replaced wi

34、res do not contact sharpedges or pointed parts.H. When a power cord has been replaced, check that5 - 6 kg of force in any direction will not loosen it.I.Also check areas surrounding repaired locations.J. Be careful that foreign objects (screws, solderdroplets, etc.) do not remain inside the set.K. C

35、rimp type wire connectorThe power transformer uses crimp type connec-tors which connect the power cord and the primaryside of the transformer. When replacing the trans-former, follow these steps carefully and preciselyto prevent shock hazards.Replacement procedure1)Remove the old connector by cuttin

36、g the wires ata point close to the connector.Important: Do not re-use a connector. (Discardit.)2)Strip about 15 mm of the insulation from the endsof the wires. If the wires are stranded, twist thestrands to avoid frayed conductors.3)Align the lengths of the wires to be connected.Insert the wires ful

37、ly into the connector.4)Use a crimping tool to crimp the metal sleeve atits center. Be sure to crimp fully to the completeclosure of the tool.L. When connecting or disconnecting the internalconnectors, first, disconnect the AC plug from theAC outlet.1-3AC Voltmeter(High Impedance)Exposed Accessible

38、PartBOne side ofPower Cord Plug ProngsZChassis or Secondary ConductorddPrimary Circuit Terminals1-2-3 Safety Check after ServicingExamine the area surrounding the repaired locationfor damage or deterioration. Observe that screws,parts, and wires have been returned to their originalpositions. Afterwa

39、rds, do the following tests and con-firm the specified values to verify compliance withsafety standards.1. Clearance DistanceWhen replacing primary circuit components, confirmspecified clearance distance (d) and (d) between sol-dered terminals, and between terminals and sur-rounding metallic parts.

40、(See Fig. 1-2-1)Table 1-2-1 : 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 currentbetween B (earth ground, power cord plug prongs)and externally exposed accessible

41、 parts (RF termi-nals, antenna terminals, video and audio input andoutput terminals, microphone jacks, earphone jacks,etc.) is lower than or equal to the specified value in thetable below. Measuring Method (Power ON) :Insert load Z between B (earth ground, power cordplug prongs) and exposed accessib

42、le parts. Use anAC voltmeter to measure across the terminals of loadZ. See Fig. 1-2-2 and the following table.AC Line VoltageClearance Distance (d), (d)220 to 240 V 3 mm(d) 6 mm(d)Table 1-2-2: Leakage current ratings for selected areasNote: This table is unofficial and for reference only. Be sure to

43、 confirm the precise values.AC Line VoltageLoad ZLeakage Current (i)One side of power cord plugprongs (B) to:220 to 240 V2k RES. Connected in paralleli0.7mA AC Peaki2mA DCRF orAntenna terminals50k RES. Connected in paralleli0.7mA AC Peaki2mA DCA/V Input, OutputFig. 1-2-1Fig. 1-2-21-41-3 STANDARD NOT

44、ES FOR SERVICING1-3-1 Circuit Board Indications1. The output pin of the 3 pin Regulator ICs is indi-cated as shown.2. For other ICs, pin 1 and every fifth pin are indi-cated as shown.3. The 1st pin of every male connector is indicated asshown.1-3-2 Instructions for Connectors1. When you connect or d

45、isconnect the FFC (FlexibleFoil Connector) cable, be sure to first disconnectthe AC cord.2. FFC (Flexible Foil Connector) cable should beinserted parallel into the connector, not at anangle.1-3-3 Pb (Lead) Free SolderWhen soldering, be sure to use the Pb free solder.1-3-4 Instructions for Handling S

46、emi-conductorsElectrostatic breakdown of the semi-conductors mayoccur due to a potential difference caused by electro-static charge during unpacking or repair work.1. Ground for Human BodyBe sure to wear a grounding band (1M) that is prop-erly grounded to remove any static electricity that maybe cha

47、rged on the body.2. Ground for Workbench(1)Be sure to place a conductive sheet or copperplate with proper grounding (1M) on the work-bench or other surface, where the semi-conduc-tors are to be placed. Because the static electricitycharge on clothing will not escape through thebody grounding band, b

48、e careful to avoid contact-ing semi-conductors with your clothing.Top ViewOutInBottom ViewInput510Pin 1Pin 1FFC CableConnectorCBA* Be careful to avoid a short circuit.CBACBAGrounding BandConductive Sheet orCopper Plate1M1M2-12-1 SPECIFICATIONSITEMDESCRIPTIONVideo sectionTV systemPAL Video headRotati

49、ng 4 headsRecording systemRotating 2 head helical scan brightness signal FM method VHS standard for methods to directly record color signal low frequency conversionsAudio trackHi-Fi audio track: 2 channel Normal audio track: 1 channelTape VHS-type videocassetteTape speedSP: 23.39 mm/s LP: 11.70 mm/s

50、Maximum record and playback timeSP: 4 hours (with E-240 used)LP: 8 hours (with E-240 used)Receiving channelDV-PF7E/PF6EDV-PF7E(UK)CH IndicationTV ChannelCH IndicationTV Channel02-12E2-E1201-10TRA-IRJ, GAP13-20A-H (only ITALY)21-69E21-E6921-69E21-E6974-78X.Y.Z.Z+1.Z+274-78X.Y.Z.Z+1.Z+288-99, 100S1-S2