Hitachi-DVPF3A-cd-sm维修电路原理图.pdf

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1、SERVICE MANUALSERVICE MANUAL Digital Media Division, Tokai DVD PLAYER 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. 1-3-6) (4) Release the flat pack-IC from the CBA using twee- zers. (Fig. 1-3-6) Caut

2、ion: 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. 1-3-2) 2. The flat pack-IC on the CBA is affixed with glue, so be careful not to b

3、reak 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. 1-3-1 Hot-air Flat Pack-IC Desoldering Machine CBA Flat Pack-IC Tweezers Masking Tape Fig. 1-3-

4、2 1-5 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. 1-3-3) (2)Lift each lead of the flat pack-IC upward one by one, using a sharp pin or

5、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. 1-3-4) (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 pack-

6、IC and heat up. Then remove (glue will be melted). (Fig. 1-3-6) (4)Release the flat pack-IC from the CBA using twee- zers. (Fig. 1-3-6) 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 flat p

7、ack-IC, you can remove it easily. (Fig. 1-3-3) (2)Affix the wire to a workbench or solid mounting point, as shown in Fig. 1-3-5. (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 as s

8、hown in Fig. 1-3-5. (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. 1-3-6) (5) Release the flat pack-IC from the CBA using twee- zers. (Fig.

9、 1-3-6) 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. 1-3-3 Fine Tip So

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

11、ou can install a replacement flat pack-IC more easily. (2)The “I” mark on the flat pack-IC indicates pin 1. (See Fig. 1-3-7.) 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. 1-3-8.) (3)Solder all pins of the

12、 flat pack-IC. Be sure that none of the pins have solder bridges. 1-3-4 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

13、to 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 (1) 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 b

14、e 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. 1-3-7 Presolder CBA Flat Pack-IC Fig. 1-3-8 CBA CBA Gro

15、unding Band Conductive Sheet or Copper Plate 1M 1M 1-7 1-4 NOTES WHEN USING SERVICE MANUAL The following shows the contents to be noted when using service manual: Standard Notes WARNING Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pas

16、s unnoticed and the protection afforded by them cannot necessarily be obtained by using replace- ment components rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in this manual and its supplements; electrical components having su

17、ch fea- tures are identified by the mark ! in the schematic diagram and the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement parts that do not have the same safety characteristics as speci- fied in the parts list ma

18、y create shock, fire, or other hazards. Capacitor Temperature Markings Capacitors and transistors are represented by the fol- lowing symbols. Notes: 1. Do not use the part number shown on these draw- ings for ordering. The correct part number is shown in the parts list, and may be slightly different

19、 or amended since these drawings were prepared. 2. All voltages are DC voltages unless otherwise specified. Values in schematic diagrams The values, dielectric strength ( power capacitance ) and tolerances of the resistors ( excluding variable resistors ) and capacitors are indicated in the sche- ma

20、tic diagrams using abbreviations. Mark Capacity change rate Standard temperature Temperature range (B)10%20C-25+85C (F)+30 - 80%20C-25+85C (SR)15%20C-25+85C (Z)+30 - 80%20C-10+70C (Top View) (Bottom View) (Bottom View) Electrolytic Capacitor + Transistor or Digital Transistor NPN Transistor PNP Tran

21、sistor NPN Digital Transistor PNP Digital Transistor (Top View) (Top View) E C B E C B Digital Transistor CBA Symbols Schematic Diagram Symbols E C B (Top View) (Top View) E C B E C B Resistors ItemIndication Value No indication. K.k M.M Power capacitance No indication.1/4W,1/6W All capacitances oth

22、er than the above are indicated in schematic diagrams. Capacitors ItemIndication Value No indication. F P.pF Dielectric strength No indication.50V All dielectric strengths other than 50V are indicated in schematic diagrams. Coils ItemIndication Value . m.mH H 1-8 LIST OF CAUTION, NOTES, AND SYMBOLS

23、USED IN THE SCHEMATIC DIAGRAMS ON THE FOLLOWING PAGES: 1. CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE. 2. CAUTION: Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit. If Main Fuse (F1001) is blown, first check to see t

24、hat all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail. 3. Note: (1) Do not use the part number shown on the drawings for ordering. The correct part number is s

25、hown in the parts list, and may be slightly different or amended since the drawings were prepared. (2) To maintain original function and reliability of repaired units, use only original replacement parts which are listed with their part numbers in the parts list section of the service manual. 4. Wir

26、e Connectors (1) Prefix symbol CN means connector (can disconnect and reconnect). (2) Prefix symbol CL means wire-solder holes of the PCB (wire is soldered directly). 5. Voltage indications for PLAY and REC modes on the schematics are as shown below: 6. How to read converged lines 7. Test Point Info

27、rmation 231 5.0 (2.5) PLAY mode STOP mode 5.0 The same voltage for both PLAY press to adjust the tracking during normal or slow motion playback; press to remove vertical jitter in a Still picture. 7. PLAY ( B) Button(VCR) Press to begin playback. 8. STOP/EJECT ( C /A ) Button (VCR) EJECT Press to re

28、move the tape from the VCR. STOP Press to stop the tape motion. 9. AUDIO In Jacks Connect audio cables coming from the audio out jacks of a camcorder, another VCR, or an audio source here. 10. VIDEO In Jack Connect a video cable coming from the video out jack of a camcorder, another VCR, or a video

29、source (laser disc player, camcorder, etc.) here. 11. F.FWD ( g) Button (VCR) Press to rapidly advance the tape, or view the picture rapidly in forward during playback. (Forward Search). 12. REW (h ) Button (VCR) Press to rewind the tape, or to view the picture rapidly in reverse during the playback

30、 mode (Rewind Search). 13. REC ( I ) Button (VCR) Press once to start a recording. Press repeatedly to start a One Touch Recording. 14. REC Light Lights up during recording. 15. TIMER Light This light glows when the DVD/VCR is in standby mode for a timer recording or during a One Touch Recording. It

31、 flashes if TIMER is pressed for a timer recording, but there is no tape in the DVD/VCR. It flashes when all timer recordings or One Touch Recording are finished. 16 VCR OUTPUT Light (Green) This light appears when the VCR output mode is selected. You can only watch tapes when the green VCR OUTPUT l

32、ight is on. To make the green VCR OUTPUT light come on, VCR on the remote control or OUTPUT on the front panel. 17. OUTPUT Button Press to select DVD mode or VCR mode. You can switch the output mode either by pressing OUTPUT on the front panel, or by pressing DVD or VCR on the remote control. Howeve

33、r, if you press OUTPUT on the front panel first, you need to re- select the corresponding mode by pressing DVD or VCR on the remote control. 18. DVD OUTPUT Light (Green) This light appears when the DVD output mode is selected. You can only watch DVDs when the green DVD OUTPUT Light is on. To make th

34、e green DVD OUTPUT light come on, press DVD on the remote con- trol or OUTPUT on the front panel. 19. Display, Remote Sensor Window 20. PLAY ( B) Button (DVD) Press to begin playback. 21. STOP ( C ) Button (DVD) Stops operation of the disc. 22. SURROUND Button Press to activate the virtual surround.

35、 23. POWER/STANDBY (yy/I) Button Press to turn the power on and off. (As to the indication of the Operate switch, “ I ” shows ON and “yy/I” shows electrical power stand-by.) 24. A-B REPEAT Button Repeats playback of a selected section. 25. REPEAT Button Repeats playback of the current disc, title, c

36、hapter or track. 26. MODE Button Activates programme playback or random playback mode when playing CDs or MP3. Sets virtual surround. 2-3 OPERATING CONTROLS AND FUNCTIONS 2-5 40. h Button DVD mode Press to view the DVD picture in fast reverse motion or to reverse playback of an Audio CD. VCR mode Pr

37、ess to rewind the tape, or to view the picture rapid- ly in reverse during the playback mode (Rewind Search). 41. PAUSE/STEP (k) Button DVD mode Press to pause Disc playback. Press repeatedly to advance the DVD picture step by step (or one frame at a time). VCR mode While recording, press to tempora

38、rily stop the recording (pause). Press a second time to resume nor- mal recording. You can not pause a One Touch Recording. Or, press during tape playback to freeze the picture. Press to advance the picture one frame at a time during still mode. 42. D Button DVD mode Press to fast forward the Disc.

39、Press PAUSE/STEP, then press this button to begin slow motion playback. Press this button repeatedly to change the forward speed of slow motion. VCR mode Press to rapidly advance the tape, or view the picture rapidly in forward during playback (Forward Search). 43. PLAY (B) Button DVD mode Press to

40、begin playback. VCR mode Press to begin playback. 44. PROG (o/p)Button (VCR) Press to change TV channels on the DVD/VCR. Press to adjust the tracking during normal or slow motion playback; press to remove vertical jitter in a still picture. 45. REC Button (VCR) Press once to start a recording. 46. S

41、PEED Button (VCR) Press to select the VCRs recording speed (SP or LP) 47. VCR Button Press to select VCR mode for the remote control. You can switch the OUTPUT mode either by press- ing OUTPUT on the front panel, or by pressing DVD or VCR on the remote control. However, if you press OUTPUT on the fr

42、ont panel first, you need to re- select the corresponding mode by pressing DVD or VCR on the remote control. 48. SETUP Button (DVD) Press to enter the setup mode. 49. TOP MENU Button (DVD) Press to bring up the Top Menu on a disc. 50. DISPLAY Button DVD mode Press to access or remove the display scr

43、een during DVD or Audio CD playback. VCR mode Press to access or remove the VCRs On screen sta- tus display. 51. AUDIO Button DVD mode Press to select a desired audio language or sound mode. VCR mode Press to select a desired sound mode. 52. Number Buttons DVD mode Press to directly select a Track (

44、Audio CD) for playback. 27. ZOOM Button Enlarges part of a DVD-reproduced image. 28. CLEAR/C.RESET Button DVD mode Press to reset the setting. VCR mode Press to reset the counter. 29. ANGLE Button Press to change the camera angle to see the sequence being played back from a different angle. 30. SUBT

45、ITLE Button Press to select the desired subtitle language. 30. TIMER Button Press to put the VCR into standby mode for a timer recording. 31. MENU Button DVD mode Press to display the menu of the Disc. VCR mode Press to access the VCR menu. 32. Arrow Buttons DVD mode 32. p / o / B / s Buttons Move t

46、he cursor and determines its position. VCR mode 32. p / o Buttons Press to enter digits when setting programme (For example: setting clock or timer programme). Press to select the setting modes from the on screen menu. B Button When setting programme (For example: setting clock or timer programme),

47、press to determine your selection and proceed to the next step you want to input. Press to determine the setting modes from the on screen menu. s Button Press to cancel a setting of timer programme. Press to correct digits when setting programme (For example: setting clock or timer programme). 33. E

48、NTER Button (DVD) Press to accept a setting. 34. RETURN Button (DVD) Returns to the previous operation. 35. DISC NAVIGATION Button (DVD) Press to display the first scenes of each chapter of the title being played. SYSTEM Button(VCR) To change the VCR colour system during playback for matching recorded system (PAL or MESECAM) 36. DVD Button Press to select DVD mode for the remote control. You can switch the OUTPUT mode either by press- ing OUTPUT on the front panel, or by pressing DVD or VCR on the remote control. However, if you press OUTPUT on the front panel fi