Hitachi-DVRF7U-cd-sm维修电路原理图.pdf

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1、SERVICE MANUAL SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT Digital Media Division,Tokai DVD VIDEO RECORDER with VIDEO CASSETTE RECORDER 2004July TK No. 0417E DV-RF7U 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

2、Repair . 1-1 1-1 Cautions . 1-1 1-2 Use of Solder for Repairs . 1-1 1-3 Use of Solder for Repairs . 1-1 1-4 Electrostatic Protection Measures . 1-2 1-5 Notes When Using Service Manual . 1-3 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 Feat

3、ures . 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 . 2-11 3 Details of Servicing and Troubleshooting . 3-1 3-1 Details of Servicing. 3-1 3-1

4、-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 3-2 Troubleshooting . 3-3 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) Rear Panel a

5、nd FAN Motor. 4-2 (4) DVD Multi Drive . 4-3 (5) DVD Main P.C.B and Jack P.C.B . 4-3 (6) Front P.C.B . 4-4 (7) Deck Mechanism. 4-4 (8) Key P.C.B and VCR Main P.C.B . 4-5 4-3 VCR Deck Parts Locations . 4-6 4-3-1 Top View . 4-6 4-3-2 Bottom View . 4-7 4-4 VCR Deck Mechanism Disassembly . 4-8 (1) Holder

6、 FL Cassette Assy Removal . 4-8 (2) Lever FL Arm Assy Removal . 4-8 (3) Lever FL Door Removal . 4-9 (4) Slider FL Drive, Gear FL Cam Removal . 4-9 (5) Gear Worm Wheel Removal . 4-10 (6) Cable Flat Removal . 4-10 (7) Motor Loading Assy Removal . 4-11 (8) Bracket Gear, Gear Joint 2, 1 Removal . 4-11 (

7、9) Gear Loading Drive, Slider Cam, Lever Load S, T Assy Removal. 4-12 (10) Lever Pinch Drive, Lever Tension Drive Removal . 4-13 (11) Lever Tension Assy, Band Brake Assy Removal . 4-13 (12) Lever Brake S, T Assy Removal . 4-14 (13) Gear Idle Assy Removal . 4-14 (14) Disk S, T Reel Removal. 4-15 (15)

8、 Holder Clutch Assy Removal . 4-15 (16) Lever Up Down Assy, Gear Center Assy Removal . 4-16 (17) Guide Cassette Door Removal . 4-17 (18) Lever Unit Pinch Assy, Plate Joint, Spring Pinch Drive Removal . 4-17 (19) Lever #9 Guide Assy Removal. 4-18 (20) FE Head Removal . 4-18 (21) ACE Head Removal . 4-

9、19 (22) Slider S, T Assy Removal . 4-19 (23) Plate Ground Deck, Cylinder Assy Removal . 4-20 (24) Hook Capstan, Belt Pulley Removal . 4-20 (25) Motor Capstan Assy Removal . 4-21 (26) Post #8 Guide Assy Removal . 4-21 4-5 The table of cleaning, Lubrication and replacement time about principal parts.

10、4-22 5 Adjustment. 5-1 5-1 Set-up for Adjustment . 5-1 5-2 VCR Electrical Adjustment . 5-2 5-2-1 Reference. 5-2 5-2-2 Head Switching Adjustment. 5-3 5-2-3 NVRAM Option Setting. 5-3 5-3 VCR Mechanism Adjustment. 5-4 5-3-1 Tape Transport System and Adjustment Locations. 5-4 RadioFans.CN 收音机爱 好者资料库 Con

11、tents - 2 5-3-2 Tape Transport System Adjustment . 5-5 5-3-3 Reel Torque . 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 Deck Mechanism Section-Top view . 6-2 6-1-3 Deck Mechanism Section-Bottom view 6-3 6-2 Parts List . 6-4 6-2-1 Mechanical Part

12、s List . 6-4 6-2-2 Electrical Parts List. 6-5 S Schematic, Wiring Diagrams . S-1 S-1 Wiring Diagram.S-1 S-2 S.M.P.S Schematic Diagram .S-2 S-3 Power Schematic Diagram .S-3 S-4 Logic Schematic Diagram.S-4 S-5 A/V Schematic Diagram .S-5 S-6 Hi/Fi/MTS Schematic Diagram .S-6 S-7 MUX PR/PB: chrominance s

13、ignals), degrading of image will be reduced. A device that decodes the data coded and recorded on DVD Video and restores it to video and audio signals. This processing is referred to as decoding. A difference between maximum and minimum levels of audio recorded on disc: Measured in decibel (dB) unit

14、s. If the dynamic range is compressed (audio DRC), the minimum signal level will increase and the maximum signal level will decrease: This will reduce the higher audio signal - such as burst sound - so that the low-level audio signal - such as human voice - can be heard more clearly. Audio coding fo

15、rmat developed by Dolby Laboratories in U.S, also simply referred as AC3 format: Supports 5-channel full-range sound and one channel for sub-woofer sound playback. Dynamic Range Control: Adjusting the audio range of maximum and minimum levels (dynamic range) will improve audio signal when, for examp

16、le, dialog is hard to hear or user is watching movies late at night. Digital Theater System: Sound system as for movie theaters developed by US Digital Theater Systems, Inc. The number of channels provided by DTS is the same for Dolby AC3. Digital Versatile Disc. A huge amount of digital data for vi

17、deo (movie) and audio can be recorded on this disc, whose size is the same as CD. One type of DVD standard disc, on which high-quality audio can be recorded One type of DVD standard disc, to which writing once is possible (recordable type) One type of DVD standard disc, to which writing up to 100,00

18、0 times is possible One type of DVD standard disc, to which writing up to 1000 times is possible One type of DVD standard disc, on which high-quality video and audio can be recorded Video recording/playback standard that applies to DVD-Video, DVD-R and DVD- RW Video recording/playback standard that

19、applies to DVD-RAM and DVD-RW: This allows versatile editing functions, differing from the DVD Video Format. DVD recorders normally use data that is common between images, and individually record different data for each image. I-picture: Images recorded independently for the reference of commonly us

20、ed data. P-picture: Images created from past I-picture or P-picture B-picture: Images created from both I and P pictures, which interact between both types Since I-picture delivers the highest image quality, selecting I-picture is recommended when adjusting image quality. 2 - 12 General Description

21、List of Abbreviations and Terms for DVD Recorder Index J M O P S T V W Abbreviation/Term JPEG MPEG MPEG Audio Layer 2 MP3 Optical digital audio output Pan 4: 5V CHECK BUTTON AND PATTERN CHANGE IC601, XT601 NO NO NO NO YES CHECK CN604-5, 9 3.2V CHECK IC601 CHECK POWER BLOCK YES YES YES CHECK MECHANIS

22、M NO IC601-67 FG pulse CHECK CAPSTAN MOTOR YES (VCR Section) VCR Main PCB FWD SEARCH DOESNT OPERATE PLAY OPERATION PRESS F.FWD FOR FORWARD SEARCH CHECK IC601 CHECK CAPSTAN MOTOR IS CAPSTAN SPEED CHANGED? SEARCH OPERATION NOISE BAR LOCKING END ADJUST ACE HEAD CHANGE DECK CHANGE IC601 SEE PLAY MODE IN

23、OPERATIVE NO NO NO YES NO (CONTROL PULSE) IC601-76 NO YES YES YESYES (VCR Section) VCR Main PCB 3 - 7 Details of Servicing and Troubleshooting Troubleshooting TURN POWER ON AND INSERT A TAPE PRESS EJECT BUTTON CASSETTE LOADING MECHANISM DOES NOT OPERATE TAPE DETECTED CST IN MODE IC601-87: HIGH(5V) C

24、HANGE IC601 CHECK START SENSOR (S602) IC601 CHECK LM B+ LINE CHANGE IC601 NONO NO YES IC601-59:LOW(0V) IC601-58:HIGH(5V) IC601-59: HIGH(5V) IC601-58: LOW(0V) CHECK CASSETTE LOADING MECHANISM YES YES NO CN604-8 12V? YES NO YES (VCR Section) VCR Main PCB PLACE VCR IN STOP MODE CHANGE IC301 LINE 2 VIDE

25、O INPUT VIDEO MISSING IN EE MODE IC301-26 VIDEO OUT NO NO NO IC601-49 VIDEO IN YES YES Q801-E VIDEO OUT YES CHECK IC601 NO IC301-53,54 VIDEO DATA/ CLOCK YES CHECK OSD PICTURE CHECK IC801, Q801 CHECK LINE OUT and C832, R806, R804 CHECK R638, C623, C622 NO IC601-50 SYNC IN YES (VCR Section) VCR Main P

26、CB, Jack PCB (3xx, 6xx) (8xx) 3 - 8 Details of Servicing and Troubleshooting Troubleshooting VIDEO MISSING IN RECORD MODE IC301-21 VIDEO signal out? NO DEFECT RECORD MODE E-E mode and IC301-26 CHECK VIDEO signal out NO YES IC301-22 VIDEO signal out? CHECK C305 NO YES IC301-14 CHECK REC FM signal? CH

27、ECK IC301-23 Power 5V NO YES IC301-70 REC FM signal in? CHECK IC301-68 Power 5V and R320 NO YES IC301-73 (SP) IC301-66 (SLP) CHECK REC FM signal? CHECK drum wafer and VIDEO head NO YES (VCR Section) VCR Main PCB VIDEO MISSING IN PLAY MODE VIDEO EE MODE OPERATION PLACE THE VCR IN PLAY MODE CHANGE IC3

28、01CHECK IC601 CHECK VIDEO HEAD CHECK C305 CHECK IC601-23 CHECK VIDEO OUT LINE SEE VIDEO MISSING IN EE MODE NO YES YES NO YESYES VIDEO FM IC301-14 VIDEO IC301-22 VIDEO IC301-26 VIDEO IC601-49, 47 VIDEO IC801-20 NO HD SW IC301-57 NO YES YES NONONO CHECK IC801 (VCR Section) VCR Main PCB, Jack PCB (3xx,

29、 6xx) (8xx) YES 3 - 9 Details of Servicing and Troubleshooting Troubleshooting COLOR MISSING IN RECORD MODE (VIDEO IN) RECORD MODE (VCR Section) NOTE: XT301 - Always (3.579545MHz) COLOR signal IC301-46 COLOR KILLER IC301 60(2V) CHANGE IC301 CHECK THE REC LINE SEE VIDEO MISSING IN RECORD MODE NO NO N

30、O YES YES CHECK XT301 CHANGE XT301 NO CHANGE IC301 YESYES VCR Main PCB COLOR MISSING IN PLAY MODE FM-ENV IC301-14 COLOR-MONITOR IC301-46 COLOR-KILLER IC301-60(2V) SW 30Hz IC301-57 CHANGE IC301 CHECK IC301-48, 51 XT301 CHECK IC601 SEE VIDEO MISSING IN PLAY MODE NO NO NO NO YES YES YES NOTE: XT301 - A

31、lways (3.579545MHz) (VCR Section) VCR Main PCB YES 3 - 10 Details of Servicing and Troubleshooting Troubleshooting OSD PICTURE MISSING CHECK IC601-37, 38 14.318MHz signal out CHECK IC601-52, 53 AFC signal out CHANGE IC601 CHECK C618,C619 CHECK C626, R639 YES NO YES NO (VCR Section)VCR Main PCB SELEC

32、T LINE MODE WITHOUT INPUT SIGNAL BLUE MISSING IN STOP MODE CHANGE IC601 CHECK IC601-37, 38 14.318MHz out CHECK IC601-52, 53 AFC signal CHECK C626, R639 CHECK C618, C619 NO NO YES YES CHECK IC601-50 SYNK signal CHECK C622, R638 NO YES (VCR Section) VCR Main PCB 3 - 11 Details of Servicing and Trouble

33、shooting Troubleshooting (VCR Section) VCR STOP MODE AUDIO MISSING IN EE MODE IC801-44, 46, 56, 58 Audio signal input INPUT CHOICE MODE CHECK TM401 CHECK IC601 CHECK C543, C544, R516, R517 CHECK IC801 CHECK C819, C820, C825, C826 L1/L2 NO NO NONO TUNER YES YES YES YES IC501-78, 80 AUDIO SIGNAL NO YE

34、S IC801-42, 54 AUDIO SIGNAL CHANGE IC501 CHECK Q303 YES IC501-51 3.58MHz CHECK CLK, DATA IC501-37, 38 IC501-57 AUDIO SIGNAL INPUT NO (VCR Section)VCR Main PCB, Jack PCB (5xx, 6xx) (4xx, 8xx) MISSING AUDIO IC501-78, 80 AUDIO SIGNAL IC501-26 AUDIO FM CHECK CYLINDER CHANGE IC501 CHECK C511, R506 CHANGE

35、 IC501 CHECK AUDIO MISSING IN EE MODE AUDIO MISSING IN RECORD MODE MONO HIFI MONO NO NO YES YES IC501-9, 71 AUDIO SIGNAL IC501-37, 38 CLK, DATA CHECK R523, R524, R525, R511 CHECK R509, R510 NO NO YES YES (VCR Section) VCR Main PCB 3 - 12 Details of Servicing and Troubleshooting Troubleshooting CHECK

36、 Q304, Q305, C354 CHECK R331, C353 CHANGE IC301 IC301-76 AUDIO SIGNAL IC501-6 AUDIO SIGNAL NO NO NO IC301-53, 54, 55 CHECK (CLOCK, DATA) CHECK C336, R322, R348 YESNO NO NO YES YES YES YES YES CHANGE IC301 CHANGE IC501 IC301-10 AUDIO SIGNAL IC301-9 AUDIO FM SIGNAL IC301-7 MIX SIGNAL (AUDIO+70KHz) Q30

37、5 OSCILLATION CHECK AUDIO MISSING IN PLAY MODE CHECK ACE HEAD MONO NO CHECK AUDIO MISSING IN EE MODE PLACE THE VCR IN PB MODE CHANGE IC501 AUDIO MISSING IN PLAY MODE CHECK C349, R333 or CHANG IC301 CHECK ACE HEAD C353, C348, R332 AND CHANGE IC301 AUDIO SELECT IC501-24, 27 AUDIO FM(MIXED) CHECK IC501

38、-39(A.H D SW) CHANGE CYLINDER OR IC501 NO HIFI MONO YES IC301-3 AUDIO SIGNAL NO YES (VCR Section) VCR Main PCB 3 - 13 Details of Servicing and Troubleshooting Troubleshooting PLAY NO SERVO LOCK IC601-67 C-FG IC601-76 CTL PULSE CHECK CTL PULSE AC LEVEL (SP. SLP: OVER 1Vp-p) CHANGE IC601 CHECK ACE HEA

39、D CHECK CN604-1 NO NO NO YES YES YES (VCR Section)VCR Main PCB CAPSTAN DOES NOT ROTATE PLACE THE VCR IN PLAY MODE CN604-2 15V CN604-3 PC 5V CN604-5 3.2V CN604-9 2.6V IC601-33 OUTPUT(PWM) IC601-35 OUTPUT(PWM) CHECK CAPSTAN MOTOR CHECK R615, C606, R630 CHECK R632 CHANGE IC601 CHECK IC601 CHECK AL15V L

40、INE IN THE POWER BLOCK CHECK PC5V LINE IN THE POWER BLOCK NO NONO NO YES NO YES NO YES YES YESYES (VCR Section) VCR Main PCB 3 - 14 Details of Servicing and Troubleshooting Troubleshooting DRUM DOES NOT ROTATE CN604-8 12V CN604-3 5V CN604-12 2.5V CHECK CYLINDER MOTOR CN601-34 PWM OUT CHECK 5V LINE C

41、HECK PC12V LINE IN THE POWER BLOCK NO NO NO YES YES YES CHANGE IC601 NO CHECK R631, R617, R618, C609, C610 (VCR Section)VCR Main PCB 3 - 15 Details of Servicing and Troubleshooting Troubleshooting Is (Front PCB) mounted correctly? Is the connection between FJACK2 (Front PCB) and FJACK1(Jack PCB) cor

42、rect? Check the short between KEY1 and SEG3 Check the soldering of Front PCB No No Check the connection between FJACK1 and FJACK2 Is the connection between MCON1 and CN02 (VCR Main PCB) correct? NoCheck the connection between MCON1 and CN02 Yes Yes Yes Tray repeats open/close operation Is the 40-pin FFC cable (between main EEPROM), be sure to perform the “Head switching adjustment” an