Hitachi-DVW1U-cd-sm维修电路原理图.pdf

TK No.9006E SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT DVD PLAYER . CD RECORDER SERVICE MANUAL 2000MayDigital Media Products Division, Tokai DV-W1U RadioFans.CN 收音机爱 好者资料库 NOTICE: 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 resistors/ 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 diagram 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 completely 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 customer 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 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 resistor 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 transformer 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 (earth) (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 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 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 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 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. 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. DEVICE UNDER TEST (READING SHOULD NOT BE ABOVE 0.5mA) LEAKAGE CURRENT TESTER TEST ALL EXPOSED METAL SURFACES 2-WIRE CORD ALSO TEST WITHPLUG REVERSED(USING AC ADAPTER PLUG AS REQUIRED) GROUND (EARTH) RadioFans.CN 收音机爱 好者资料库 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 board 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 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) 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) All 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 of 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 parts 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 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 3-3. RECORDER AUDIO CIRCUIT.1-6 4. Instructions on Use.1-7 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. Side cover(L),(R) and Top cover.2-2 2-2. Rear panel.2-2 2-3. JAK and REG board.2-3 2-4. Front cover, IF, FLHP, SW-DVD and SW-CDR board.2-3 2-5. DVD-ROM and DEC board.2-4 2-6. CD-R and Bottom cover.2-4 CHAPTER 3EXPLODED VIEW 1. CABINET SECTION.3-1 CHAPTER 4REPLACEMENT PARTS LIST 1. MECHANICAL PARTS LIST.4-1 2. ELECTRICAL PARTS LIST.4-1 SCHEMATIC, CIRCUIT BOARD CHAPTER 5 AND BLOCK DIAGRAMS CONNECTION DIAGRAM.5-1 SCHEMATIC/CIRCUIT BOARD LCD DISPLAYFLPH.5-3 / 5-25 DVD SWITCHSW-DVD.5-5 / 5-20 CDR SWITCHSW-CDR.5-5 / 5-20 INTERFACEIF.5-6 / 5-23 REAR JACKJAK.5-7 / 5-21 REGURATORREG.5-9 / 5-23 DECK-1DEC .5-11 / 5-16 DECK-2DEC .5-13 / 5-16 BLOCK DIAGRAM.5-27 1 - 1 CHAPTER 1GENERAL INFORMATION General Component video output S Video output terminal Video output Audio output Audio input Other terminals Headphone output 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 650nm (DVD) .780nm (CD,VCD) Power supply.AC120V, 60Hz Power consumption.27W Stand-by power consumption.3.5W Weight.4.8kg Overall size.435(W)330(D)81(H)mm Allowable operating temperature.+5C+35C Allowable operating humidity.1575%(no condensation) 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.pinj ack 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 system (pin jack 6) Sound characteristics Input level.200mVrms (1kHz,-20dB) 1 system (pin jack 2) Digital Audio output Optical/CoaxialCoaxial terminal.1 (DTS/AC-3/MPEG2, LPCM, OFF commutable)Optical connector.1 Digital Audio input optical/coaxialCoaxial terminal.1 (DTS/AC-3/MPEG2, LPCM, OFF commutable)Optical connector.1 Output level.15 mW, 32 ohm (mini jack) Remote control unit.1 signal AA batteries.2 AV cord.1 Ferrite core.1 Frequency characteristicsCD: 4Hz20kHz (EIAJ) DVD: 4Hz22kHz (48k sampling) 4Hz44kHz (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 Dimension Weight Region Code OSD languages Playing Default Power Requirement (Common Power Supply) Power Consumption Regulation Front-End Solution(Drive) Remote Controller Playable Disc Type DVD/VCD/CD-DA CVD/SVCD/DVCD CD-R/CD-RW Disc Size PAL/NTSC Disc RAM Read Recordable Disc Type CD-R/CD-RW for Audio Video Universal Video Output Select Video Digital to Analog Converter Video Default Black Level Select (0/7.5) by Setup Menu Closed Caption for NTSC DVD S-Video Output Connector Component Video Output Connector (US pin) Composite Video Output Connector D Terminal SCART Connector SCART RGB Signal ON/OFF by Setup Menu Sharpness Select by Setup Menu Still picture selection with Setup Menu Y-Level Control by Setup Menu HUE Level Control by Setup Menu Sharpness Control (Picture Button by Remote Control) Hue Control (Picture Button by Remote Control) Audio Audio Digital to Analog Converter Audio output Connector Digital Audio Output-Optical Digital Audio Output-Coaxial Headphone Jack with Volume Control New Karaoke Mic Jack MPEG2 Audio Down -Mix 2ch MPEG2 Multi channel AC-3 Audio Down-mix 2ch AC-3 Dolby Multi Channel output OSD Speaker Configuration DTS Output Dolby Pro Logic Decode Virtual Surround (Spatializer N-2-2) 5.1ch Source DV-W1U 435mm(W) 330mm(D) 81mm(H) 4.8kg 1 3 (English,French,Spanish) English 120V 60Hz 27W UL/CSA/FCC DVD:GD-2501(2-laser 2-lens)- CD-R/RW:CRD-RA1WO2 w/ Jog/Shuttle O/O/O O/O/(O) O/O 8cm/12cm O/O O/O Auto/NTSC/PAL/PAL60 10 bit NTSC O O 1