Hitachi-DVPF2U-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. S-1-6) (4) Release the flat pack-IC from the CBA using twee- zers. (Fig. S-1-6) 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. S-1-2) 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. S-1-1 Hot-air Flat Pack-IC Desoldering Machine CBA Flat Pack-IC Tweezers Masking Tape Fig. S-1-

4、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 o

5、r 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 pac

6、k-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 flat

7、 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 as

8、 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. (Fig

9、. 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 S

10、oldering 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 s

11、o 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 of

12、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 to

13、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 be p

14、laced. 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 Ground

15、ing Band Conductive Sheet or Copper Plate 1M 1M 1-6-1 PREPARATION FOR SERVICING How to Enter the Service Mode About Optical Sensors Caution: An optical sensor system is used for the Tape Start and End Sensors on this equipment. Carefully read and follow the instructions below. Otherwise the unit may

16、 operate erratically. What to do for preparation Insert a tape into the Deck Mechanism Assembly and press the PLAY button. The tape will be loaded into the Deck Mechanism Assembly. Make sure the power is on, TP502 (SENSOR INHIBITION) to GND. This will stop the function of Tape Start Sensor, Tape End

17、 Sen- sor and Reel Sensors. (If these TPs are connected before plugging in the unit, the function of the sensors will stay valid.) See Fig. 1. Note: Because the Tape End Sensors are inactive, do not run a tape all the way to the start or the end of the tape to avoid tape damage. About REC-Safety Swi

18、tch Caution: The REC-Safety Switch is directly mounted on the Main CBA. When the Deck Mechanism Assembly is removed from the Main CBA for servicing, this switch does not work automatically. What to do for preparation In order to record, press the Rec button while pushing REC-SAFETY SW on the Main CB

19、A. See Fig. 1. TP502 S-INH (REC-SAFETY SW) SW506 Q504 Q503 Fig. 1 1-7-1 FRONT PANEL REMOTE CONTROL +10 +100 CLOSE 3 MODE 2 SEARCHOPEN 9 ZOOM DISPLAY 8 AUDIO 0 TOP MENU SETUP PLAY SKIPCH CH 56 1 A-B REPEAT REPEAT 7 CLEAR/ C. RESET SUBTITLE MODE ANGLE DVDVCR/TVVCR SLOWSPEEDREC RETURN MENU STOP TV POWE

20、R VIDEO/TV 4 SURROUND PAUSE/STEP VOL TV ENTER 28 27 29 30 31 32 33 34 35 36 37 38 62 63 61 57 58 59 60 40 43 42 55 53 54 56 52 51 44 45 46 50 49 48 47 41 39 1. Disc loading tray 2. DVD OPERATION Light (Green) This light appears when the DVD output mode is select- ed. You can only watch DVDs when the

21、 green DVD OPEN/ CLOSE STOPSKIPPLAY SEARCH SKIP DVDVCR STOP/EJECTREWPLAY POWER/STANDBY F.FWDIRT TIMER SET VCR/TV CST.IN OUTPUT CHANNEL VIDEO IN L (mono) R AUDIO IN 12 364587 9 26 25 24 23 22 21 20 19 18 17 16 15 14 13 10 11 12 OUTPUT Light is on. To make the green DVD OUT- PUT light come on, press t

22、he DVD Button on the remote control or the OUTPUT Button on the front panel. 3. VCR OPERATION Light (Green) This light appears when the VCR output mode is selected. You can only watch tapes when the green VCR OUTPUT light is on. To make the green VCR OUTPUT light come on, the VCR Button on the remot

23、e control or the OUTPUT Button on the front panel. 4. CASSETTE COMPARTMENT 5. IRT Light Lights up during recording. 6. TIMER SET Light This light glows when the DVD/VCR is in standby mode or off for a timer recording or during a One- Touch Recording. It flashes if the TIMER SET Button is pressed for

24、 a timer recording, but there is no tape in the DVD/VCR. It flashes when all timer recordings or Instant Recording Timer are finished. 7.POWER/STANDBY Button Press to turn the power on and off. 8.POWER/STANDBY Light Lights up when the power is on. 9. VIDEO In Jack Connect a video cable coming from t

25、he video out jack of a camcorder, another VCR, or a video source (laser disc player, etc.) here. 10. AUDIO In Jacks Connect audio cables coming from the audio out jacks of a camcorder, another VCR, or an audio source here. 11. TIMER SET Button Press to put the DVD/VCR into standby mode for a timer r

26、ecording. 12. VCR/TV Light Lights up when the DVD/VCR is in the VCR posi- tion, and goes off when it is in the TV position. 13. CST. IN Light Lights up when a cassette is in the DVD/VCR. 14. CHANNEL Buttons In VCR mode, press to change TV channels on the DVD/VCR; press to adjust the tracking during

27、nor- mal or slow motion playback; press to remove verti- cal jitter in a Still picture. 15. IRT Button (VCR) Press once to start a recording. Press repeatedly to start a Instant Recording Timer. VCR operation Buttons : Blue DVD operation Buttons : Yellow Common operation Buttons : White OPERATING CO

28、NTROLS AND FUNCTIONS 1-7-2 16. F.FWD Button (VCR) Press to rapidly advance the tape, or view the picture rapidly in forward during playback. (Forward Search). When setting program (For example:setting clock or timer program), press to determine your selection and proceed to the next step you want to

29、 input. Press to determine the setting modes from the on screen menu. Press to add or delete channel num- bers during channel preset. 17. PLAY Button (VCR) Press to begin playback. Press to enter digits when setting program (For example: setting clock or timer program). Press to select the setting m

30、odes from the on screen menu. 18. REW Button (VCR) Press to rewind the tape, or to view the picture rapid- ly in reverse during the playback mode (Rewind Search). Press to cancel a setting of timer program. Press to correct digits when setting program (For example: setting clock or timer program). P

31、ress to add or delete channel numbers during channel preset. 19.STOP/EJECT Button (VCR) EJECT Button Press to remove the tape from the VCR. STOP Button Press to stop the tape motion. Press to enter digits when setting program (For example:setting clock or timer program). Press to select the setting

32、modes from the on screen menu. 20. OUTPUT Button Press to select DVD mode or VCR mode. You can switch the output mode either by pressing the OUTPUT Button on the front panel, or by pressing the DVD or VCR Button on the remote control. However, if you press the OUTPUT Button on the front panel first,

33、 you need to re- select the corresponding mode by pressing the DVD or the VCR Button on the remote control. 21.SKIP/SEARCH(G / g) Button (DVD) Plays back from the beginning of the next chapter or track. Hold down to fast forward playback. 22. PLAY Button (DVD) Starts playback of the disc contents. 2

34、3.SKIP/SEARCH(H / h) Button (DVD) Plays back from the beginning of the current chapter or track. Hold down to fast reverse playback. 24. STOP Button (DVD) Stops operation of the disc. 25. OPEN/CLOSE Button Press to insert discs into or remove them from the tray. 26. Display, Remote Sensor Window 27.

35、 SURROUND Button 28.(POWER/STANDBY) Button Press to turn the power on and off. 29. A-B REPEAT Button Repeats playback of a selected section. 30. REPEAT Button Repeats playback of the current disc, title, chapter or track. 31. MODE Button Activates program playback or random playback mode when playin

36、g CDs or MP3. Sets Black level or SRS TruSurround. 32. ZOOM Button Enlarges part of a DVD-reproduced image. 33. CLEAR/C.RESET Button DVD mode Press to reset the setting. VCR mode Press to reset the counter. Press to exit from the MENU screen. 34. ANGLE Button Press to change the camera angle to see

37、the sequence being played back from a different angle. 35. MENU Button DVD mode Press to display the menu of the Disc. VCR mode Press to access the VCR menu. 36. ENTER Button Press to accept a setting. 37. Arrow Buttons Use when making settings while watching the display on a TV screen. 38. RETURN B

38、utton Returns to the previous operation. 39. VCR/TV Button Use to select VCR or TV position. If the VCR/TV light appears on the front of the DVD/VCR, it is in VCR position (in either VCR or DVD mode). If the VCR/TV light doesnt appear on the front of the DVD/VCR, it is in TV position. VCR Position W

39、hen the green VCR OUTPUT light appears on the front of the DVD/VCR, use the VCR to watch a tape, watch a TV program while recording it, or watch a TV broadcast using the CHANNEL or Number Buttons to change channels at the DVD/VCR. When the green DVD OUTPUT light appears on the front of the DVD/VCR,

40、use the DVD/VCR to view Disc playback or menus. TV Position Use to watch TV (changing channels at the TV) or watch one program while recording another. 40. DVD Button Press to select DVD mode for the remote control. You can switch the OUTPUT mode either by pressing the OUTPUT Button on the front pan

41、el, or by pressing the DVD or the VCR Button on the remote control. However, if you press the OUTPUT Button on the front panel first, you need to re- select the corresponding mode by pressing the DVD or the VCR Button on the remote control. 41. SLOW Button During tape playback, press to view the vid

42、eo tape in slow motion. Press again to resume normal playback. This Button does not affect DVD playback. 42. SKIP Buttons DVD mode Press to skip Chapters or Tracks. 43. Stop Button DVD mode Stops operation of the disc. VCR mode Press to stop the tape motion. Press to enter digits when setting progra

43、m (For example: setting clock or timer program). Press to select the setting modes from the on screen menu. 1-7-3 44. h Button DVD mode Press to view the DVD picture in fast reverse motion or to reverse playback of an Audio CD. VCR mode Press to rewind the tape, or to view the picture rapid- ly in r

44、everse during the playback mode (Rewind Search). Press to cancel a setting of timer program. Press to correct digits when setting program (For example: setting clock or timer program). Press to add or delete channel numbers during channel preset. 45. TV POWER Button 46. VIDEO/TV Button 47. VOL Butto

45、ns 48. CH Buttons 49. PAUSE/STEP 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 temporarily stop the recording (pause). Press a second time to resume normal recording. You can not pau

46、se 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. 50. g Button DVD mode Press to fast forward the Disc. Press the Pause Button, then press the FWD Button to begin slow motion playback. Press the FWD But

47、ton repeated- ly to change the forward speed of slow motion. VCR mode Press to rapidly advance the tape, or view the pic- ture rapidly in forward during playback (Forward Search). When setting program (For example: set- ting clock or timer program), press to determine your selection and proceed to t

48、he next step you want to input. Press to determine the setting modes from the on screen menu. Press to add or delete channel numbers during channel preset. 51. PLAY Button DVD mode Press to begin playback. VCR mode Press to begin playback. Press to enter digits when setting program (For example: set

49、ting clock or timer program). Press to select the setting modes from the on screen menu. 52. CH Buttons Press to change TV channels on the DVD/VCR. 53. REC Button Press once to start a recording. 54. SPEED Button Press to select the VCRs recording speed (SPor SLP) 55. VCR Button Press to select VCR mode for the remote control. You can switch the OUTPUT mode either by pressing the OUTPUT Button on the front panel, or by pressing the DVD or the VCR Button on the remote control. However, if you press the OUTPUT Button on the front panel first, you need to re- select the correspond