Hitachi-DVDS253-cd-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT HDD/DVD RECORDER May 2006 SM0607 DV-DS163E DV-DS163E(UK) DV-DS253E DV-DS253E(UK) DO NOT RESELL OR DIVERT IMPROPERLY. 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 .

2、1-1 1-2 Electrostatic Protection Measures .1-2 1-3 Cautions When Handling DVD Drive .1-2 1-4 Cautions When Handling HDD .1-3 1-5 Lead-Free Solder .1-4 1-6 Notes When Using Service Manual .1-5 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 Speci

3、fi cations .2-4 2-3 Major Differences from Previous Model .2-5 2-4 Function Differences from Previous Model .2-6 2-5 Names of Parts .2-7 2-6 HDMI Connection .2-10 2-7 List of Abbreviations and Terms for DVD Recorder .2-11 3 Details of Servicing and Troubleshooting . 3-1 3-1 How to Remove Disc from F

4、aulty Recorder .3-1 3-2 Initialization .3-2 3-2-1 Factory Set .3-2 3-2-2 HDD Format .3-2 3-3 Troubleshooting HDD .3-3 3-4 Checking Versions of Firmware and Updating .3-4 3-4-1 Version check procedure .3-4 3-4-2 Method of starting up fi rmware update program .3-4 3-4-3 Main fi rmware updating procedu

5、re .3-5 3-4-4 Loader fi rmware updating procedure .3-6 3-4-5 Main/Loader fi rmware simultaneous updating procedure .3-6 3-5 Troubleshooting .3-7 3-5-1 Troubleshooting electronic system .3-7 4 Disassembly and Reassembly. 4-1 4-1 Order of Disassembly .4-1 4-2 Disassembly .4-2 (1) Top Cover, Fan .4-2 (

6、2) Front Block .4-3 (3) TIMER-1 P.C.B, TIMER-2 P.C.B, Front Panel .4-3 (4) MAIN P.C.B .4-4 (5) Power Cable, SMPS P.C.B .4-5 (6) HDMI Block, HDMI P.C.B .4-6 (7) Front Frame, DVD Block, DVD Drive Unit, LOADER P.C.B .4-7 (8) HDD Block, HDD P.C.B, HDD .4-8 (9) CARD P.C.B .4-9 (10) I/O P.C.B .4-10 (11) R

7、ear Panel .4-10 5 ExplodedView and Parts List. 5-1 5-1 Exploded View .5-1 5-2 Parts List .5-2 S Schematic,Wiring Diagrams. S-1 S-1 Wiring Diagram .S-1 S-2 SMPS Schematic Diagram .S-2 S-3POWER Schematic Diagram (I/O P.C.B) .S-3 S-4 TUNER/SYSTEM Schematic Diagram (I/O P.C.B) .S-4 S-5 JACK Schematic Di

8、agram (I/O P.C.B) .S-5 S-6 DECODER Schematic Diagrams (I/O P.C.B) .S-6 S-7 TIMER-1,TIMER-2 Schematic Diagram (TIMER-1,TIMER-2 P.C.B) .S-7 S-8 HDMI Schematic Diagram (HDMI P.C.B) .S-8 -TO BE ADDED- S-9 Circuit Waveforms .S-9 S-10 Circuit Voltage Chart .S-10 C Circuit Board Diagrams. C-1 C-1 I/O Circu

9、it Board Diagram .C-1 C-2 SMPS Circuit Board Diagram .C-3 C-3 TIMER-1 Circuit Board Diagram .C-3 C-4 TIMER-2 Circuit Board Diagram .C-3 C-5 HDMI Circuit Board Diagram .C-4 C-6 HDD Circuit Board Diagram .C-4 RadioFans.CN 收音机爱 好者资料库 Contents - 2 B Block Diagrams. B-1 B-1 Overall Block Diagram .B-1 B-2

10、 SMPS Circuit Block Diagram .B-2 B-3 POWER (I/O Board) Circuit Block Diagram .B-3 B-4 AUDIO/VIDEO Circuit Block Diagram .B-4 B-5 SYSTEM Circuit Block Diagram .B-5 RadioFans.CN 收音机爱 好者资料库 1 - 1 Safety Precaution for Repair1 1-1 Cautions CAUTION There is a high-voltage section inside the DVD video rec

11、order. 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 t

12、hem necessarily be obtained by using replacement components rated for a higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identifi ed in this Service Manual. Electrical components having such features are identifi ed by marking with a on the schemati

13、cs 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, fi re, or other hazards. Product safety is con

14、tinuously 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 SAF

15、ETY 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 Meas

16、ures / 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 groun

17、ding 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:

18、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 res

19、istors 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 stati

20、c 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 -

21、 3 1-4 Cautions When Handling HDD (Hard Disk Drive) HDD is a high precision device, and is very susceptible to vibrations or impact. Even if HDD operates normally immediately after it has been subjected to vibrations or impact, a problem may occur after it is used for a while: When servicing, take g

22、reat care with the following. There are two types of HDD: CSS format (head remains on disk regardless of operation status) and ramp loading format (head moves away from disk during no operation). The impact resistance characteristics are slightly different for the two. When servicing, observe the fo

23、llowing cautions regardless of the format: (1) Cautions during unpacking 1) Do not subject the HDD to any impact when placing on desk: The head hitting against the desk could result in damage. 2) If condensation occurs because of the environment, leave the HDD without being turned on for at least 3

24、hours until it adapts to surrounding environment. If the HDD is turned on while the head is sticking to disk because of condensation, the disk may be damaged. (2) Cautions during transportation An HDD is more susceptible to vibrations or impact when it is turned on or operating than during no operat

25、ion. 1) Do not move the HDD while it is turned on: If the HDD is subject to any impact while the disk is rotating, i.e., the head hitting against the disk, breakage could result. 2) Move the HDD approximately 2 minutes (approximately 30 seconds for surveillance system devices) after turning it off a

26、nd unplugging its power cord from AC outlet. The disk will still be rotating by inertia immediately after the HDD is turned off: Subjecting the HDD to movement at this time could destroy it. (3) Cautions during operation 1) Do not unplug the power cord from AC outlet during operation: This could dam

27、age the data on HDD. Be sure to turn the HDD off before unplugging the power cord. 2) Do not hit the HDD: The head hitting the disk could result in breakage. (4) Caution during packing 1) Use the packing material of relevant model: Material superior in impact resistance is used. Using other packing

28、materials could result in fault. (5) Cautions when handling unassembled HDD 1) Hold the HDD at both sides so that the circuit board surface is facing below: Holding the HDD at the top and bottom could cause the head to drift, which could result in fault. 2) Do not touch the terminal or pattern on ci

29、rcuit board. 3) Place HDD on a spot where cushion is pasted with the circuit board surface facing below. 4) Do not hold or place stacked HDDs. 5) Do not drop or hit HDD against anything: Dropping HDD from even 5 mm high on a work bench with high stiffness could cause fault. Safety Precaution for Rep

30、air Cautions When Handling HDD (Hard Disk Drive) 1 - 4 1-5 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

31、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 s

32、olderedTip temperature Surface-mounted (chip) parts other than those shown below 320 30C heating time: less than 5 seconds Surface-mounted (chip) parts for DVD cameras, cellular phones only 350 10C heating time: less than 3 seconds Discrete parts380 30C Chassis, metal shield, etc.420 30C (2) Lead-fr

33、ee 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 servicin

34、g 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

35、 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 t

36、o 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 temperatur

37、e for lead-free solder, mix lead based solder and lead-free solder suffi ciently. 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 - 5 (3) Identifying sides A/B in circuit board diagrams 1) Board with

38、pattern on one side only and parts on both sides: Side A: Shows discrete parts. Side B: Shows leadless parts, viewed from the pattern side. 2) Board with patterns and parts on both sides: Sides A and B are identifi ed without any predetermined rules. (4) Indicating model names The indication of mode

39、ls is defi ned as follows: 1) The common parts of model names are omitted. Example: When indicating VM-D975LA and VM-D875LA: VM-D975LA/D875LA, D975LA/D875LA 2) If there is no difference in models going to different destinations, the indication of destination is omitted. Example: When indicating DZ-M

40、V350E(AU) and DZ-MV350E(SW): DZ-MV350E 1-6 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 schem

41、atic 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: Safety Precaution for Repair Notes When Using Service Manual PartsIndication in list Regular indication Resistor KOHM .k CapacitorUF .?F PF.pF CoilUH .?H MH .mH ResistorsCapacitors Coils ItemIndication ValueNo indication . K.k M .