Hitachi-DVP705U-cd-sm维修电路原理图.pdf

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1、TK No.9010E SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT DVD PLAYER SERVICE MANUAL 2000SeptemberDigital Media Products Division, Tokai DV-P705E DV-P705E(UK) DV-P705U DVD/CD/VIDEO CD PLAYER DV-P705 VIRTUAL SURROUNDOPEN/CLOSE DISC NAVIGATION TOP MENU PUSH ENTER MENU STOP SKIP FWD REV

2、 PLAY/ PAUSE /I RadioFans.CN 收音机爱 好者资料库 PRODUCT SAFETY NOTICE Many electrical and mechanical parts have special safety-related characteristics. These are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for

3、 a higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified by marking with a on the schematics and the parts list in this Service Manual. The use of a substitute r

4、eplacement component which does not have the same safety characteristics as the HITACHI recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards. Product safety is continuously under review and new instructions are issued from time to time

5、. For the latest information, always consult the current HITACHI Service Manual. A subscription to, or additional copies for, HITACHI Service Manual may be obtained at a nominal charge from HITACHI SALES CORPORATION. LASER RADIATION Do not stare at the laser beam CAUTION RadioFans.CN 收音机爱 好者资料库 NOTI

6、CE: Comply with all cautions and safety related notes located on or inside the cabinet and on the chassis. 1. When replacing a chassis in the instrument, all the protective devices must be put back in place, such as barriers, non-metallic knobs, adjustment and compartment covers/shields, isolation r

7、esistors/ capacitors, etc. 2. When service is required, observe the original lead- ress. Extra precautions should be taken to assure correct lead dress in the high voltage circuit. 3. Always use the manufacturers replacement components. Especially critical components as indicated on the circuit diag

8、ram should not be replaced by other manufacturers. Furthermore, where a short-circuit has occurred, replace those components that indicate evidence of overheating. 4. Before returning an instrument to the customer, the service technician must thoroughly test the unit to be certain that it is complet

9、ely safe to operate without danger of electrical shock, and be sure that no protective device built into the instrument by the manufacturer has become defective or inadvertently defeated during servicing. Therefore, the following checks should be performed for the continued protection of the custome

10、r and service technician. Leakage Current Cold Check With the AC plug removed from the AC120V, 60Hz source, place a jumper across the two plug prongs. Turn the AC power switch on. Using an insulation tester (DC500V), connect one lead to the jumpered AC plug and touch the other lead to exposed metal

11、parts (antennas, screwheads, metal overlays, control shafts, etc.), particularly any exposed metal part having a eturn path to the chassis. Exposed metal parts having a return path to the chassis should have a minimum resistor reading of 0.3 Mohm and a maximum resistor reading of 5 Mohm. Any resisto

12、r value below or above this range indicates an abnormality which requires corrective action. Exposed metal parts not having a return path to the chassis will indicate an open circuit. Leakage Current Hot Check Plug the AC line cord directly into a AC120V, 60Hz outlet (do not use an isolation transfo

13、rmer for this check). Turn the AC power switch on. Using a Leakage Current Tester, measure for current from all exposed metal parts of the cabinet (antennas, screwheads, metal overlays, control shaft, etc.), particularly an exposed metal part having a return path to the chassis, to a known ground (e

14、arth) (water pipe, conduit, etc.). Any current measured must not exceed 0.5 mA. SAFETY PRECAUTIONS AC Leakage Test ANY MEASUREMENTS NOT WITHIN THE LIMITS OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED BEFORE RETURNING THE UNIT TO THE CUSTOMER. PRODUCT SAFETY NOTICE M

15、any electrical and mechanical parts have special safety- related characteristics. These are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for a higher voltage, wattage, etc. Replacement parts which have

16、these special safety characteristics are identified in this Service Manual. Electrical components having such features are identified by marking with aon the schematics and the parts list in this Service Manual. The use of a substitute replacement component which does not have the same safety charac

17、teristics as the HITACHI recommended replacement one, shown in the parts list in this Service Manual, may create shock, fire, or other hazards. Product safety is continuously under review and new instructions are issued from time to time. For the latest information, always consult the current HITACH

18、I Service Manual. A subscription to, or additional copies for, HITACHI Service Manual may be obtained at a nominal charge from HITACHI SALES CORPORATION. DEVICE UNDER TEST (READING SHOULD NOT BE ABOVE 0.5mA) LEAKAGE CURRENT TESTER TEST ALL EXPOSED METAL SURFACES 2-WIRE CORD ALSO TEST WITHPLUG REVERS

19、ED(USING AC ADAPTER PLUG AS REQUIRED) GROUND (EARTH) LASER RADIATION Do not stare at the laser beam CAUTION Notes When Using Service Manual The following shows the contents to be noted when using service manual: 1. Value units used in parts list This table shows locations of each part on circuit boa

20、rd diagrams. The locations are indicated using the guide scales on the external lines of diagrams. 1) One diagram indicated for each board The values, dielectric strength (power capacitance) and tolerances of the resistors (excluding variable resistors) and capacitors are indicated in the schematic

21、diagrams using abbreviations. Resistors Certain symbols are indicated below for value units of resistors, capacitors and coils in parts list. When you read them note the following regular indications: Indication in listRegular indication KOHM.k UF.F PF.pF UH.H MH.mH Parts Resistor Capacitor Coil 2)

22、Two diagrams indicated for each board 2. Values in schematic diagrams Item Value Tolerance Power capacitance Indication No indication. K.k M.M No indication. 5% (All tolerances other than 5% are indicated in schematic diagrams) No indication. 1/8W (1/16W for leadless resistors without indication) Al

23、l capacitances other than the above are indicated in schematic diagrams. Capacitors Item Value Dielectric strength Indication No indication.F P.pF No indication. 50V (All dielectric strengths other than 50V are indicated in schematic diagrams) Item Value Indication .H m.mH Coils 3. Identifications o

24、f sides A/B in circuit board diagrams 1) Board having a pattern on one side and parts on both sides. Side A:Shows discrete parts, viewed from the pattern side. Side B:Shows leadless parts, viewed from the pattern side. 2) Board having patterns on both sides and parts on both sides. Side A:Shows part

25、s and patterns which can be seen when the case is opened. Side B:Shows parts and the pattern on the back of side A. 4. Table for indexing locations of parts Parts Location 2 A Symbol No. IC IC1201 Type of part Zone A on board diagram Circuit No. Zone 2 on board diagram Parts Location A - 2 A Symbol

26、No. IC IC1201 Zone 2 on board diagram A: Shows side A B: Shows side B Zone A on board diagram Type of part Circuit No. CONTENTS CHAPTER 1GENERAL INFORMATION 1. Specifications . 1-1 2. Comparison with Previous Model. 1-2 3. Troubleshooting. 1-4 3-1. VIDEO CIRCUIT . 1-4 3-2. AUDIO CIRCUIT . 1-5 4. Sel

27、f-Diagnosis Function . 1-6 5. Instructions on Use. 1-9 CHAPTER 2DISASSEMBLY 1. Before Starting Disassembly . 2-1 2. Disassembly Method . 2-1 Parts Hierarchy Chart . 2-1 Disassembly Procedure Diagrams . 2-2 2-1. Top cover . 2-2 2-2. Tray panel, Front panel, FSW board and MVR board . 2-3 2-3. Rear pan

28、el . 2-4 2-4. VID board and REG board . 2-5 2-5. AUD board and DEC board . 2-5 2-6. DVD-ROM and Bottom cover . 2-6 CHAPTER 3EXPLODED VIEW 1. CABINET SECTION . 3-1 CHAPTER 4REPLACEMENT PARTS LIST 1. MECHANICAL PARTS LIST . 4-1 SCHEMATIC, CIRCUIT BOARD CHAPTER 5 AND BLOCK DIAGRAM CONNECTION DIAGRAM .

29、5-1 SCHEMATIC/CIRCUIT BOARD FRONT SWITCHFSW . 5-3 / 5-23 POWER SWITCHMVR . 5-5 / 5-23 VIDEO JACKVID. 5-6 / 5-20 AUDIO JACKAUD . 5-7 / 5-21 REGURATORREG . 5-9 / 5-25 DECK-1DEC . 5-11 / 5-16 DECK-2DEC . 5-13 / 5-16 BLOCK DIAGRAM . 5-27 1 - 1 CHAPTER 1GENERAL INFORMATION General SCART terminal For DV-P

30、705E/E(UK) Component video output For DV-P705U S Video output terminal Video output Audio output Other terminals Accessories 1. Specifications Specification and exterior aspect of the model may be changed for improvements without advance notice. Operating Laser.Semi-conductor laser: Wave length 650n

31、m (DVD) .780nm (CD,VCD) Power supply.DV-P705E/E(UK): AC230V, 50Hz .DV-P705U: AC120V, 60Hz Power consumption.24W Weight.3.4kg Overall size.434(W)284(D)91(H)mm Allowable operating temperature.+5C+35C Allowable operating humidity.1575%(no condensation) AV connector output.20 pin connector This connecto

32、r provides the video and signals for connection to a colour video TV monitor (or TV set) which has a AV CONNECTOR terminal. Y output level.1 Vp-p (75 ohm) PB output level NTSC.0.7 Vp-p (75 ohm) PAL.0.698 Vp-p (75 ohm) PR output level NTSC.0.7 Vp-p (75 ohm) PAL.0.698 Vp-p (75 ohm) Output terminal.Pin

33、 Jack Y output level.1 Vp-p (75 ohm) C output level NTSC.0.286 Vp-p(75 ohm) PAL.0.3 Vp-p (75 ohm) Output terminal.S terminal Output level.1 Vp-p (synchronous when loaded at 75 ohm) Output terminal.pin jack Output level.200m Vrms (1kHz, -20dB) Mixed 2ch Output.1 system (pin jack 2) 5.1 ch Output.1 sy

34、stem (pin jack 6) Sound characteristics Digital Audio output Optical/CoaxialCoaxial terminal.1 (DTS/AC-3/MPEG2, LPCM, OFF commutable)Optical connector.1 Remote control unit.1 signal AA batteries.2 AV cord.1 Power cord.1 Frequency characteristicsCD: 4Hz20kHz (EIAJ) DVD: 4Hz22kHz (48k sampling) 4Hz44k

35、Hz (96k sampling) SN ratio110dB Dynamic range100dB Total harmonic distorion rate0.003% Wow flutterticsMeasurement limit less than (0.001% W.PEAK) (EIAJ) 1 - 2 2. Comparison with Previous Model DV-P705E/E(UK)/UDV-P505E/E(UK)/U General Dimension434(W)x284(D)x91(H)mm434(W)x284(D)x91(H)mm Weight3.4kg3.7

36、kg Region Code2For E/E(UK), 1For U2For E/E(UK), 1For U Power Requirement230V 50HzFor E/E(UK),230V 50HzFor E/E(UK), 120V 60HzFor U120V 60HzFor U Power Consumption24W24W RegulationCE(CB)For E/E(UK),CE(CE)For E/E(UK), C-UL/DOCFor UC-UL/DOCFor U DVD-ROM DriveHAD-2505GD-2501 or (2X Speed /2-Laser 1-lens)HAD-2505