Hitachi-DVP725U-cd-sm维修电路原理图.pdf

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1、SERVICE MANUALSERVICE MANUAL DVD PLAYERDVD PLAYER SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT TKNo. 9205ETKNo. 9205E DV-P725UDV-P725U 2002 REV MENUTOP MENU OPEN / CLOSE PHONES LEVELPHONES MINMAX FWD POWER / STANDBY Digital Media Division, TokaiApril RadioFans.CN 收音机爱 好者资料库 parts u

2、pdated 6/12/03 CONTENTS SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1-1 COMPARISON OF MODELS . . . . . . . . . . . . . . . . . . . .1-2-1 LASER BEAM SAFETY PRECAUTIONS. . . . . . . . . . . 1-3-1 IMPORTANT SAFETY PRECAUTIONS. . . . . . . . . . . .1-4-1 Product Safety Noti

3、ce . . . . . . . . . . . . . . . . . . . . . . . . . 1-4-1 Precautions during Servicing. . . . . . . . . . . . . . . . . . . . 1-4-1 Safety Check after Servicing. . . . . . . . . . . . . . . . . . . . 1-4-2 STANDARD NOTES FOR SERVICING . . . . . . . . . . . . 1-5-1 Circuit Board Indications . . . .

4、. . . . . . . . . . . . . . . . . . . 1-5-1 Instructions for Connectors . . . . . . . . . . . . . . . . . . . . . 1-5-1 How to Remove/Install Flat Pack-IC . . . . . . . . . . . . . . 1-5-1 Instructions for Handling Semi-conductors . . . . . . . . . 1-5-3 ORERATING CONTROLS AND FUNCTIONS . . . . . .

5、. 1-6-1 FIRMWARE RENEWAL MODE . . . . . . . . . . . . . . . . . . 1-7-1 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . 1-8-1 CABINET DISASSEMBLY INSTRUCTIONS . . . . . . . . 2-1-1 1. Disassembly Flowchart . . . . . . . . . . . . . . . . . . . . . . 2-1-1 2. Disassembly Method. . .

6、 . . . . . . . . . . . . . . . . . . . . . 2-1-1 EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1-1 Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1-1 REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . 3-2-1 Mechanical Parts List .

7、 . . . . . . . . . . . . . . . . . . . . . . . . 3-2-1 Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2-2 SCHEMATIC DIAGRAMS/CBAS AND TEST POINTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1-1 Wiring Diagram . . . . . . . . . . . . . . . . . . . . .

8、 . . . . . . . . . 4-1-3 DVD Main 1/4 Schematic Diagram . . . . . . . . . . . . . . . 4-1-4 DVD Main 2/4 Schematic Diagram . . . . . . . . . . . . . . . 4-1-5 DVD Main 3/4 Schematic Diagram . . . . . . . . . . . . . . . 4-1-6 DVD Main 4/4 Schematic Diagram . . . . . . . . . . . . . . . 4-1-7 AV 1/3

9、Schematic Diagram. . . . . . . . . . . . . . . . . . . . . 4-1-8 AV 2/3 when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (1) Release the flat pack-IC from the CBA using twee- zers. (Fig. S-1-6) Ca

10、ution: 1. Do not supply hot air to the chip parts around the flat pack-IC for over 6 seconds because damage to the chip parts may occur. Put masking tape around the flat pack-IC to protect other parts from damage. (Fig. S-1-2) 2. The flat pack-IC on the CBA is affixed with glue, so be careful not to

11、 break or damage the foil of each pin or the solder lands under the IC when removing it. Top View OutIn Bottom View Input 5 10 Pin 1 Pin 1 FFC Cable Connector CBA * Be careful to avoid a short circuit. Fig. S-1-1 Hot-air Flat Pack-IC Desoldering Machine CBA Flat Pack-IC Tweezers Masking Tape Fig. S-

12、1-2 1-5-2 With Soldering Iron: (1)Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it easily. (Fig. S-1-3) (2)Lift each lead of the flat pack-IC upward one by one, using a sharp pin

13、 or wire to which solder will not adhere (iron wire). When heating the pins, use a fine tip soldering iron or a hot air desoldering machine. (Fig. S-1-4) (3)Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat p

14、ack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (4)Release the flat pack-IC from the CBA using twee- zers. (Fig. S-1-6) With Iron Wire: (1)Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is applied to all pins of the fl

15、at pack-IC, you can remove it easily. (Fig. S-1-3) (2)Affix the wire to a workbench or solid mounting point, as shown in Fig. S-1-5. (3)While heating the pins using a fine tip soldering iron or hot air blower, pull up the wire as the solder melts so as to lift the IC leads from the CBA contact pads

16、as shown in Fig. S-1-5 (4) Bottom of the flat pack-IC is fixed with glue to the CBA; when removing entire flat pack-IC, first apply soldering iron to center of the flat pack-IC and heat up. Then remove (glue will be melted). (Fig. S-1-6) (5) Release the flat pack-IC from the CBA using twee- zers. (F

17、ig. S-1-6) Note: When using a soldering iron, care must be taken to ensure that the flat pack-IC is not being held by glue. When the flat pack-IC is removed from the CBA, handle it gently because it may be damaged if force is applied. Flat Pack-IC Desoldering Braid Soldering Iron Fig. S-1-3 Fine Tip

18、 Soldering Iron Sharp Pin Fig. S-1-4 To Solid Mounting Point Soldering Iron Iron Wire or Hot Air Blower Fig. S-1-5 Fine Tip Soldering Iron CBA Flat Pack-IC Tweezers Fig. S-1-6 1-5-3 2. Installation (1)Using desoldering braid, remove the solder from the foil of each pin of the flat pack-IC on the CBA

19、 so you can install a replacement flat pack-IC more easily. (2)The “I” mark on the flat pack-IC indicates pin 1. (See Fig. S-1-7.) Be sure this mark matches the 1 on the PCB when positioning for installation. Then presolder the four corners of the flat pack-IC. (See Fig. S-1-8.) (3)Solder all pins o

20、f the flat pack-IC. Be sure that none of the pins have solder bridges. Instructions for Handling Semi-conductors Electrostatic breakdown of the semi-conductors may occur due to a potential difference caused by electro- static charge during unpacking or repair work. 1. Ground for Human Body Be sure t

21、o wear a grounding band (1M) that is prop- erly grounded to remove any static electricity that may be charged on the body. 2. Ground for Workbench (4) Be sure to place a conductive sheet or copper plate with proper grounding (1M) on the workbench or other surface, where the semi-conductors are to be

22、 placed. Because the static electricity charge on clothing will not escape through the body ground- ing band, be careful to avoid contacting semi-con- ductors with your clothing. Example : Pin 1 of the Flat Pack-IC is indicated by a mark. Fig. S-1-7 Presolder CBA Flat Pack-IC Fig. S-1-8 CBA CBA Grou

23、nding Band Conductive Sheet or Copper Plate 1M 1M 1-6-1 FRONT PANEL REMOTE CONTROL +10 CLOSE 3 MODE 2 SEARCHOPEN 9 ZOOM DISPLAY 8 AUDIO 0 TOP MENU SETUP FF PLAY SKIP SEARCH CH 56 1 A-B REPEAT REPEAT 7 CLEAR SUBTITLE MODE ANGLE RETURN MENU STOP FR SEARCH TV POWER VIDEO/TV 4 SURROUND PAUSE/STEP VOL TV

24、 DV RM ENTER 24 25 26 27 29 30 31 32 6 15 5 14 1 23 3 21 9 20 10 19 18 17 16 12 7 4 22 28 33 34 11 1.(POWER/STANDBY) Button 2. Disc loading tray 3. OPEN/CLOSE Button 4. PLAY Button 5. STOP Button 6. SKIP DOWN/REV Button Plays back from the beginning of the current chapter or track. Hold down to fast

25、 reverse play- back. 7. SKIP UP/FWD Button Plays back from the beginning of the next chap- ter or track. Hold down to fast forward playback. 8. Shuttle Ring (REV/FWD) Turn to make rewind or fast forward speed faster in the forward or backward direction in the Play mode or Still mode. The further the

26、 Shuttle Ring is rotated, the faster the playback speed. 9. AUDIO Button Press to select a desired audio language or sound mode. 10. SUBTITLE Button Press to select a desired subtitle language. 11. SURROUND Button 12. PAUSE/STEP Button 13. Display, Remote Sensor Window 14. TV POWER Button 15. VIDEO/

27、TV Button 16. VOL Button 17. CH Button 18. FF SEARCH Button 19. SETUP Button 20. TOP MENU Button 21. DISPLAY Button 22. Numeric Buttons 23. SEARCH MODE Button 24. A-B REPEAT Button 25. REPEAT Button 26. MODE Button 27. ZOOM Button 28. CLEAR Button 29. ANGLE Button Press to change the camera angle to

28、 see the sequence being played back from a different angle. 30.MENU Button 31. ENTER Button 32. Arrow Buttons Use when making settings while watching the display on a TV screen. 33. RETURN Button 34. FR SEARCH Button 35.PHONES LEVEL (Headphone level control) Adjust the volume by phones level. 36. PH

29、ONES (Headphone jack) To connect headphone (Not supplyed) for person- REV MENUTOP MENU OPEN / CLOSE PHONES LEVELPHONES MINMAX FWD POWER / STANDBY 1 23 4 5 6 7 121336 35 8 323120 30 al listening. OPERATING CONTROLS AND FUNCTIONS 1-6-2 DISPLAY DISPLAYS DURING OPERATION LOADING THE BATTERIES Stays on w

30、hen the inserted disc is being played back. CD: Lights up when a CD is inserted on the tray. VCD: Lights up when a Video CD is inserted on the tray. Lights up when a DVD is inserted on the tray. Lights up when the inserted disc comes to a pause. Stays on when the A-B repeat function is on. Stays on

31、when the repeat function is on. Lights up when a playback control is activated. Displays how long a current title or track has been played back. When a chapter or track has switched, the number of a new title, chapter or track is displayed. Power on No disc inserted Tray open Tray closed Loading the

32、 Disc Power off 1. Open the battery compartment cover. 2. Insert two AAbatteries, with each one oriented cor- rectly. 3. Close the cover. Notes Do not mix alkaline and manganese batteries. Do not mix old and new batteries. 1-6-3 DESCRIPTION-REAR PANEL S-VIDEO OUT COMPONENT VIDEO OUT ANALOG AUDIO OUT

33、 DIGITAL AUDIO OUT VIDEO OUT Y CB/PB CR/PR RLCOAXIALOPTICAL 12345 PROGRESSIVE IP 6 1. DIGITAL AUDIO OUT JACKS: Use either an optical or coaxial digital cable to connect to a compatible Dolby Digital receiber. Use to connect to a Dolby Digital decoder or DTS decoder. 2. ANALOG AUDIO OUT JACKS Connect

34、 to the Audio input jacks of A/V-compatible TV or wide screen TV, Stereo system. 3. VIDEO OUT JACK Use a video cable to connect one of the jack to Video input on your A/V-compatible TV or wide screen TV, Stereo system. 4. COMPONENT VIDEO OUT JACKS Use these jacks if you have a TV with Component Vide

35、o in jacks. These jacks provide CR/PR, CB/PBand Y video. Along with S-Video, Component Video provides the best picture quality. 5. S-VIDEO OUT JACK Use the S-Video cable to connect this jack to the S-Video jack on your A/V-compatible TV or wide screen TV for a higher quality picture. 6. PROGRESSIVE

36、switch “DTS” and “DTS Digital Out” are trademarks of Digital Theater Systems, Inc. Manufactured under license from Dolby Laboratories. “Dolby” and the double-D symbol are trademarks of Dolby Laboratories. The DCDi (Directional Correlational De-interlacing) system of this DVD player produces smooth a

37、nd natural video images, even if really dynamic, by eliminating the jagged edges. “DCDi” is a registered trademark of Faroudja, a division of Sage Inc. 1-7-1 FIRMWARE RENEWAL MODE HOW TO UPDATE THE FIRMWARE VERSION 1. Turn the power on and remove the disc on the tray. 2. To put the DVD player into v

38、ersion up mode, press 9, 8, 7, 6, and SEARCH MODE buttons on the remote control unit in that order. The tray will open automatically. Fig. a appears on the screen and Fig. b appears on the VFD. The DVD player can also enter the version up mode with the tray open. In this case, Fig. a will be shown o

39、n the screen while the tray is open. 3. Load the disc for version up. (For closing the tray, only the OPEN/CLOSE button is available.) 4. The DVD player enters the F/W version up mode automatically. Fig. c appears on the screen and Fig. d appears on the VFD. The appearance shown in (*2) of Fig. c is

40、 described as follows: 5. After programming is finished, the tray opens auto- matically. Fig. e appears on the screen and the checksum in (*3) of Fig. e appears on the VFD. (Fig. f) At this time, no buttons are available. 6. For tray opening, plug the AC cord into the AC out- let. 7. Turn the power

41、on by pressing the power button and the tray will close. HOW TO VERIFY THE FIRMWARE VERSION 1. After making sure that no disc is in unit, turn the power on. 2. Press 1, 2, 3, 4, and DISPLAY buttons on the remote control unit in that order. The B/E ver- sion appears on the VFD, and the F/E and B/E ve

42、r- sions appear on TV screen. BE F/W VERSION UP MODE PLEASE INSERT A DISC FOR BE F/W VERSION UP. EXIT: POWER Fig. a Version Up Mode Screen Fig. b VFD in Version Up Mode BE F/W VERSION UP MODE VERSION:* Reading.(*2) Fig. c Programming Mode Screen Fig. d VFD in Programming Mode (Example) AppearanceNo.

43、State Reading.Sending files into the memory Erasing.Erasing previous version data Programming. 1 2 3Writing new version data BE F/W VERSION UP MODE VERSION: * COMPLETED SUM:7abc(*3) Fig. e Completed Program Mode Screen Fig. f VFD upon Finishing the Programing Mode (Example) 1-8-1 FLOW CHART NO.1 FLO

44、W CHART NO.2 The power cannot be turned on.(1) FLOW CHART NO.3 The fuse blows out. The power cannot be turned on.(2) Is the fuse normal? Is normal state restored when once unplugged power cord is plugged again after several seconds. Is the EV 5V line voltage normal? Is the voltage of EV 12V, EV -30V

45、 and filament voltage normal? Does the change from STANDBY LED indicate turn-off? Is the supply voltage of 3.3V fed to Q2021? Is the supply voltage of 5V fed to pin(3) of IC2001? Is the H signal inputted at base of Q2021, when the POWER button activated on the DVD? Is the H signal inputted at base o

46、f Q2021, when the POWER button activated on the remote control unit? Replace IC601. The STANDBY LED indicate is flashing after 0.5 sec. Are the P-CON-H pulse outputted from the Pin(207) of IC601? Is the P-CON switch circuit operated normally? (Q1002, Q1005, Q1006, IC1002, D1036, D1046) Is there leak

47、ing or short-circuited primary component? Replace the fuse. See FLOW CHART No.3 Check for lead or shor-circuiting of primary circuit component? (Q1001, Q1003, D1001, D1002, D1004, D1005, D1011, T1001, C1003, C1005, etc.) Check each rectifying circuit of secondary circuit. Check the EV 3.3V line. Che

48、ck the IC2001. Check the SW2008 and POWER button line. Check the line between the remote control receiver and the pin(125) of IC601. Replace IC601. Check each component and if poor the replace. Check for short-circuiting of rectifying diode and circuit in each rectifying circuit of secondary side. Y

49、es Yes Yes No No No No No No No No No No No Yes Yes Yes Yes Yes Yes Yes (below, confirmed operating at LED turn-off of 0.5 sec. interval.) Yes TROUBLESHOOTING 1-8-2 FLOW CHART NO.4 When the output voltage fluctuates. Yes Yes No No Yes Yes Yes Yes Yes Yes No No No No No No No FLOW CHART NO.5 When buzz is heard from the vicinity of power circuit. FLOW CHART NO.6 The fluorescent display tube does not light. Is the supply voltage of 5V fed to pin(6) and pin(24) of IC2001? Is the supply voltage of -24V fed to pin(15) of IC2001? Is there 500kHz oscillatio