Hitachi-DVRV8500E-cd-sm维修电路原理图.pdf

SERVICE MANUAL SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT Digital Media Division,Yokohama DVD VIDEO RECORDER with VIDEO CASSETTE RECORDER 2005July SM0512 DV-RV8500E PAL PAL SECAM DO NOT RESELL OR DIVERT IMPROPERLY. DV-RV8500E(UK) RadioFans.CN 收音机爱 好者资料库 Contents - 1 Table of Contents 1 Safety Precaution for Repair . 1-1 1-1 Cautions . 1-1 1-2 Electrostatic Protection Measures . 1-2 1-3 Cautions When Handling DVD Drive. 1-2 1-4 Lead-Free Solder. 1-3 1-5 Notes When Using Service Manual . 1-4 2 General Description . 2-1 2-1 Overview . 2-1 2-1-1 Service method . 2-1 2-1-2 Disc information. 2-2 2-2 Features . 2-4 2-3 Specifications . 2-5 2-4 Major Differences from Previous Model . 2-6 2-5 Function Differences from Previous Model. 2-7 2-6 Names of Parts. 2-8 2-7 List of Abbreviations and Terms for DVD Recorder . 2-12 3 Details of Servicing and Troubleshooting . 3-1 3-1 Details of Servicing. 3-1 3-1-1 Removing Disc from Faulty Recorder . 3-1 3-1-2 Removing Video Cassette from Faulty Recorder. 3-1 3-1-3 Firmware . 3-2 3-1-4 Setting to defaults at the factory . 3-3 3-2 Troubleshooting . 3-4 3-2-1 Troubleshooting electronic system. 3-4 3-2-2 Troubleshooting mechanical block . 3-14 4 Disassembly and Reassembly . 4-1 4-1 Order of Disassembly . 4-1 4-2 Cabinet Disassembly. 4-1 (1) Top Cover . 4-1 (2) Front Panel. 4-2 (3) FAN Motor . 4-2 (4) SMPS P.C.B . 4-3 (5) Deck mechanism. 4-4 (6) TIMER P.C.B . 4-5 (7) VCR P.C.B . 4-5 (8) DVD multi-drive . 4-6 (9) VDR, JACK and KEY P.C.Bs . 4-6 4-3 Deck Mechanism Parts Locations . 4-7 4-4 Deck Mechanism Disassembly. 4-8 (1) Drum assembly . 4-8 (2) Top plate. 4-9 (3) CST holder assembly . 4-9 (4) F/L rack gear assembly . 4-9 (5) Door opener . 4-9 (6) F/L arm assembly. 4-9 (7) S/W lever assembly. 4-9 (8) L/D motor assembly . 4-11 (9) Wheel gear . 4-11 (10) F/E head . 4-11 (11) A/C head assembly . 4-11 (12) T brake assembly . 4-12 (13) Tension arm assembly. 4-12 (14) S reel and T reel . 4-12 (15) P4 base assembly . 4-13 (16) Lid opener . 4-13 (17) Pressure arm assembly . 4-13 (18) Take-up arm . 4-13 (19) Capstan supporter . 4-14 (20) Capstan belt and capstan motor. 4-14 (21) F/R lever. 4-14 (22) D37 clutch assembly . 4-14 (23) Driver gear and cam gear. 4-15 (24) Sector gear . 4-15 (25) Capstan brake assembly . 4-15 (26) Slider plate . 4-15 (27) Tension lever . 4-15 (28) Spring lever . 4-15 (29) Brake lever . 4-15 (30) P2 gear assembly and P3 gear assembly. 4-16 (31) P2 base assembly and P3 base assembly . 4-16 (32) Loading base. 4-16 (33) Tension base . 4-17 (34) Jog idler arm assembly . 4-17 4-5 Checking Mode after Reassembling Deck Mechanism . 4-18 RadioFans.CN 收音机爱 好者资料库 Contents - 2 5 Adjustment / Maintenance . 5-1 5-1 Set-up for Adjustment . 5-1 5-2 VCR Electrical Adjustment . 5-2 5-2-1 Head switching adjustment. 5-2 5-3 Deck Mechanism Tape Transport System Adjustment . 5-3 5-3-1 Guide roller height adjustment .5-3 5-3-2 A/C head adjustment . 5-4 5-3-3 X-value adjustment. 5-5 5-3-4 Adjustments after replacing drum assembly . 5-5 5-3-5 Check after adjustment . 5-6 5-3-6 Method of setting the mechanism to loading status without inserting tape. 5-6 5-3-7 Reel torques. 5-7 5-4 Maintenance. 5-8 5-4-1 Maintenance and inspection. 5-8 5-4-2 Lubricating oil and greasing. 5-10 6 Exploded View and Parts List. 6-1 6-1 Exploded Views . 6-1 6-1-1 Cabinet Section . 6-1 6-1-2 F / L Mechanism. 6-2 6-1-3 Deck Mechanism Section - Top view . 6-3 6-1-4 Deck Mechanism Section - Bottom view6-4 6-2 Parts List . 6-5 6-2-1 Mechanical Parts List . 6-5 6-2-2 Electrical Parts List. 6-6 S Schematic, Wiring Diagrams . S-1 S-1 Wiring Diagram.S-1 S-2 S.M.P.S Schematic Diagram .S-2 S-3SYSTEM Schematic Diagram(VCR P.C.B)S-3 S-4TUNER Schematic Diagram(VCR P.C.B) .S-4 S-5 A/V Schematic Diagram(VCR P.C.B) .S-5 S-6 Hi-Fi Schematic Diagram(VCR P.C.B) .S-6 S-7 REAR JACK Schematic Diagram (VCR P.C.B).S-7 S-8 TIMER,KEY Schematic Diagrams .S-8 S-9 JACK Schematic Diagram .S-9 S-10 A/V,SYSTEM Circuit Waveforms .S-10 S-11 CIRCUIT VOLTAGE CHART.S-11 C Circuit Board Diagrams . C-1 C-1 VCR Circuit Board Diagram. C-1 C-2 S.M.P.S Circuit Board Diagram . C-3 C-3 JACK Circuit Board Diagram . C-4 C-4 TIMER Circuit Board Diagram . C-4 C-5 KEY Circuit Board Diagram . C-4 B Block Diagrams . B-1 B-1 S.M.P.S Circuit Block Diagram.B-1 B-2 VIDEO Circuit Block Diagram .B-2 B-3 AUDIO Circuit Block Diagram .B-3 B-4 SYSTEM Circuit Block Diagram.B-4 B-5 VIDEO I/O Circuit Block Diagram .B-5 1 - 1 Safety Precaution for Repair1 1-1 Cautions CAUTION There is a high-voltage section inside the DVD video recorder. When repairing or inspecting it, take great care to prevent electric shock: Use an isolating transformer, wear gloves, etc. 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 a on 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. PRODUCT SAFETY NOTICE CAUTION This product contains a laser diode of higher class than 1. To ensure contin- ued safety, do not remove any covers or attempt to gain access to the in- side of the product. Refer all servicing to qualified personnel. 1 - 2 Safety Precaution for Repair Electrostatic Protection Measures / Cautions When Handling DVD Drive 1-2 Electrostatic Protection Measures Semiconductor components can be damaged by static electricity charged on clothes, human body, etc. Take great care when handling components to avoid electrostatic damage, and perform servicing in an environment where grounding is complete. (1) Grounding work bench Lay out an antistatic mat on work bench, and then use the ground plate to ground the work bench. Antistatic mat Ground 1M ohm 1M ohm Antistatic wrist strap 1-3 Cautions When Handling DVD Drive The optical pickup in DVD drive has a high precision structure: Be sure to observe the following cautions. 1) Do not subject optical pickups to any severe vibrations or impact during movement, installation or disassembly. 2) When performing repair work, do not perform disassembly any further than that described in this manual. 3) Never turn the semi-variable resistors for adjustment in optical pickup or DVD drive. 4) NEVER look into the objective lens in optical pickup or directly view the laser light: You could lose your eyesight. Do not directly look at laser light from pickup. (2) Grounding human body Use an antistatic wrist strap to discharge any static electricity charged on the body. Also, use a tester for wrist strap to make sure that the wrist strap is working normally. Note, however, that static electricity charged on clothes will not be discharged by wrist strap: Therefore do not allow your clothes to touch the semiconductor components. 1 - 3 1-4 Lead-Free Solder The printed circuit board that uses lead-free solder is adopted. To protect the global environment, use the recommended lead-free solder also during servicing. Read and observe the following before soldering: Caution ALWAYS wear protective goggles during soldering so that no solder smoke or scattered solder enters the eye. Lead-free solder may scatter at high temperatures of 600C. (1) Characteristics of lead-free solder The melting point of lead-free solder is 30-40C higher than that of lead based solder. Point to be soldered Surface-mounted (chip) parts other than those shown below Surface-mounted (chip) parts for DVD cameras, cellular phones only Discrete parts Chassis, metal shield, etc. Tip temperature 320 30C heating time: less than 5 seconds 350 10C heating time: less than 3 seconds 380 30C 420 30C (2) Lead-free solder for servicing Use the following lead-free solder for servicing: Recommended lead-free solder and composition of alloy (wt%): Sn-3.0Ag-0.5Cu or equivalent Information: For composition of alloy, Sn is tin; Ag is silver; Cu is copper; Bi is bismuth; Pb is lead. (3) Soldering iron for servicing The temperature of soldering iron tip must be adjusted according to the points to be soldered: Use an antistatic soldering iron with thermal control function. When removing components, take care not to damage any surrounding component or pattern. When attaching components, observe the heating time in the following table so that the components are not destroyed by heat. Tip temperatures for different soldering points: Safety Precaution for Repair Lead-Free Solder (4) Cautions when using lead based solder It is recommended that you use lead-free solder when servicing, but it is also possible to service using lead based solder. However, if lead based solder is used for servicing, take care with the following: 1) Before using lead based solder, remove the lead-free solder completely from the point to be soldered. 2) For additional soldering for repair, set the soldering iron tip temperature for lead-free solder, mix lead based solder and lead-free solder sufficiently. Do not perform any repair using the bare soldering iron tip without adding solder, since it will cause secondary failure due to lack of strength. 1 - 4 1-5 Notes When Using Service Manual (1) Value units used in parts list Certain symbols are indicated as shown below for value units of resistors, capacitors and coils in parts list. When you read them, note the following regular indications: (2) Values in schematic diagrams The values, dielectric strength (power capacitance) and tolerances of the resistors (excluding variable resistors) and capacitors are indicated in the schematic diagrams using abbreviations. Certain symbols are indicated for value units: When you read them note the regular indications in tables below: ResistorsCapacitors Coils Indication in list Regular indication KOHM.k UF.F PF.pF UH.H MH.mH Parts Resistor Capacitor Coil 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 (1/16 W for leadless resistors with no indication) All capacitances other than the above are indicated in schematic diagrams. Item Value Dielectric strength Indication No indication.F P.pF No indication. 50V (All dielectric strengths other than 50 V are indicated in schematic diagrams) Item Value Indication .H m.mH Safety Precaut