Toshiba D-VR3SU Service Manual Download Page 144 | Manualshive

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Circuit Operating Descriptions

7-44

RF and frequency synthesized tuning system
General description : The receiving circuit consists of both ANT input and output circuits, channel selection cir-
cuit, PIF circuit and SIF circuit. The receiving circuit selects a desired broadcast signal from TV signals induced on
an antenna and sends stable video and audio signals to their respective processing circuits.

(2) Tuner modulator block

As explained, this model is designed in one package to contain a RF MODULATOR BLOCK, TUNER BLOCK
AND IF DEMODULATOR BLOCK. Its size is greatly reduced and other noise interference can be minimized to
make performance high.

Fig. 7-29 Tuner/demodulator Block Diagram

ANT INPUT

(MODULATOR SECTION)

(TUNER SECTION)

(IF SECTION)

ANT OUT

Off
through
SW

VHF
RF AMP

UHF
RF AMP

UHF
Mixer

VHF
OSC

FM
Detector

SIF
Filter

UHF
OSC

PLL
IC

AGC

AFT

Mixer
IC

SAW
Filter

IF
AMP

Video
Detector

TV SET

SCL

X-TAL

IN

SDA

AUDIO OUT

AFT OUT

VIDEO OUT

9

7

10

13

11

16

7-12 TM

(1) Outline

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Summary of Contents for D-VR3SU

Page 1: ...FILE NO 810 200434 SERVICE MANUAL DVD VIDEO RECORDER VIDEO CASSETTE RECORDER D VR3SU D VR3SC D VKR3SU Oct 2004 S ...

Page 2: ...Instructions 5 Disassembly and Reassembly 6 Alignment and Adjustments 7 Circuit Operating Descriptions 8 VCR Deck Operating Descriptions 9 Troubleshooting 10 Exploded View and Parts List 11 Electrical Parts List 12 Block Diagram 13 Wiring Diagram 14 PCB Diagrams 15 Schematic Diagrams ...

Page 3: ...CONTENTS ...

Page 4: ...MEMO ...

Page 5: ...Laboratories UL 1270 40 7 With the instrument s AC switch first in the ON position and then in the OFF position measure from a known earth ground metal water pipe conduit etc to all exposed metal parts of the instrument antennas handle brackets metal cabinets screw heads metallic overlays control shafts etc espe cially any exposed metal parts that offer an electri cal return path to the chassis An...

Page 6: ...of place or frayed wiring Do not change spacing between a component and the printed circuit board Check the AC power cord for damage 5 Components parts and or wiring that appear to have overheated or that are otherwise damaged should be replaced with components parts and or wiring that meet original specifications Additionally determine the cause of overheating and or damage and if necessary take ...

Page 7: ...t 2 The service precautions are indicated or printed on the cabinet chassis or components When servic ing follow the printed or indicated service precau tions and service materials 3 The components used in the unit have a specified flame resistance and dielectric strength When replacing components use components which have the same ratings Components identi fied by shading by or by in the circuit ...

Page 8: ...the assem bly 3 Use only a grounded tip soldering iron to solder or unsolder ESD devices 4 Use only an anti static solder removal devices Some solder removal devices not classified as anti static can generate electrical charges suffi cient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacemen...

Page 9: ...s gives them the same ground as the sheet 4 Remove the optical pick up block 5 Perform work on top of the conductive sheet Be careful not to let your clothes or any other static sources to touch the unit Be sure to put on a wrist strap grounded to the sheet Be sure to lay a conductive sheet made of copper etc Which is grounded to the table Fig 1 3 6 Short the short terminal on the PCB which is in ...

Page 10: ...Precautions 1 6 MEMO ...

Page 11: ...Lens NA 0 45 0 45 0 5 0 6 0 6 0 6 Laser wavelenght 780um 780um 650um 650um 650um Track pitch 1 6pm 1 6pm 0 74pm 0 74pm 0 615pm Capacity 0 65GB 0 65GB 4 7GB 4 7GB 4 7GB Track structure Pit train Groove Pit train Groove Land Groove 2 Disc Formats DVD consists of two 0 6mm discs attached together enabling access to the upper and lower side of the disk and 4 sides could be used at maximum Single Layer...

Page 12: ...rge storage capacity DVD Audio Playback Only High quality sound that exceeds the CD multi channel Audio DVD R 1 Time Recording As with CD R write only once DVD RAM Rewritable This can be virtually used as hard disk with a random more than 100 000times read write acess Rewritable Similar to DVD RAM exiept than its technology features DVD RW About 1000times a sepueutial read write access more like p...

Page 13: ...s the user to select the scenario 7 Multi Angle Able to view the camera angle you selected among the scenes recorded with multiple camera angles Note The above media features must have the DVD Title that contains the appropriate contents to function properly 2 2 2 Audio Video Specifications Classification DVD Video Video CD LD Compression MPEG 2 MPEG 1 Analog Pixel 720 x 480 352 x 240 VIDEO Horizo...

Page 14: ...When Developing the DVD Software various addition and modification is possible DVD Video uses the variable compresion technology the MPEG 2 to compress the moving image optimally mini mizing the Data loss to Provide a clear natural screen while increasing the storage time DVD Video Feature 2 Application of the MPEG 2 compression technology MPEG 2 Variable compression Max 1 40 Field unit compressio...

Page 15: ...al Dolby Pro Logic and Stereo are all compatible Each separated channels are played back at CD quality sound Frequency band 20Hz 20KHz Linear PCM Pulse Code Modulation Provides the high quality Digital sound without the audio data compression Various Digital Recordings are possible as shown in the table to the right DVD Video Feature 3 High quality surround audio Sampling Frequency Bit Rate 16bit ...

Page 16: ...9 TV Wide Mode 16 9 Wide Full Screen 4 3 TV Letter Box Mode Pan Scan Mode DVD Video Feature 5 Multi Aspect 4 3 Pan Scan 16 9 Wide 4 3 Letter Box Up to 9 angles of view may be stored enabling the viewer to select a specific viewpoint at a given time Especially for the Music Video and Sports Title this provides a more lively image of the scene DVD Video Feature 6 Multi Angle Note Only enable to be w...

Page 17: ...the world into 6 regions and if the DVD Title and the Player s Reginal Code do not agree playback is prohibited Regionnal Coding is optional for the Soft developers Region 0 All Code but the Hardware developers must adopt the appropriate regionnal code for sale Region 1 The United States and its territories Canada Region 2 Europe Japan Greenland Egypt South Africa the Middle East Region 3 Taiwan H...

Page 18: ...nventional LD VCD or Original Film Different Authoring Process are used accoring to the Software developers and this may affect the DVD image quality Authoring Process Remark DVD Video Authoring Process Video Audio Master Surround Audio Master Subtitle Master MPEG 2 Encoding AC 3 MPEG Audio Encoding Cutting Master Disc Production Subtitle Encoding Authoring Process Video Audio Subtitle Multiplexin...

Page 19: ...inish a update The message on the screen will be displayed after finishing a update and the tray will be opened automatically And then do not turn off the unit until it goes off automatically WARNING It is very important please read the below notice before updating your unit The following events may interrupt the update process and MAY RESULT IN PERMANENT DAMAGE TO THE UNIT WHILE UPDATING Unpluggi...

Page 20: ... facing up 3 Press OPEN CLOSE to close the disc tray It takes about 1 2 minutes to show below message If you can t see the message above try to use other new disc instead of current one Generally this caused by disc quality and by disc creating problem If the message above isn t displayed after 10 minutes more and you can conclude that this unit had a critical damage after a Power off replace a ol...

Page 21: ...ned automatically And then do not turn off the unit until it goes off automatically 6 After removing a update disc turn on the unit with power button and press REW and FF button on the front panel at the same time during 5 seconds CLR will be displayed on the front display and next screen will be displayed Check the update version number Finally the Drive Firmware update is ended You can see LOAD ...

Page 22: ...Reference Information 2 12 MEMO ...

Page 23: ...els Regular TV broadcasting VHF 2 13 UHF 14 69 Cable TV broadcasting 1 125 Audio output jacks 1 2 Optical coaxial digital audio support Audio Max 0 005 total harmonic distortion T H D at average 1 kHz Output Video output jacks 1 2 S Video output 1 Y 1 0Vp p C 0 286Vp p at 75 ohm load Video Component output Y 1 0Vp p Pb 0 70Vp p Pr 0 70Vp p at 75ohm load Picture compression format MPEG II Audio com...

Page 24: ...Product Specification 3 2 MEMO ...

Page 25: ...4 1 4 Operating Instructions ...

Page 26: ...V SKIP Button 24 MARKER Button Use this to bookmark a position while playing a disc 25 QUICK Button Use this to view the status of the disc that is being played 26 PLAY LIST TOP MENU Button Use this to return to the Top menu or to view the recorded files list 27 CLEAR Button 28 SUBTITLE Button Press this to switch the DVD s subtitle language 29 REC SPEED Button 30 REC PAUSE Button Use this to paus...

Page 27: ...cable box IN OUT Cable box Wall OUT RF TO TV DIGITAL AUDIO OUT AUDIO OUT COMPONENT VIDEO OUT OPTICAL COAXIAL R Y C B P B C R P R L R AUDIO AUDIO LINE OUT LINE IN 1 VIDEO VIDEO L R L IN FROM ANT RF R L R L OUT RF TO TV IN FROM ANT OUT RF RF IN To RF OUT RF Cable To ANT INPUT ANT TV To Method 1 Connecting to a video input jack Connect a video yellow cable between the VIDEO yellow OUT jack on DVD Rec...

Page 28: ...cable box IN OUT Cable box Wall OUT RF TO TV DIGITAL AUDIO OUT AUDIO OUT COMPONENT VIDEO OUT OPTICAL COAXIAL R Y C B P B C R P R L R AUDIO AUDIO LINE OUT LINE IN 1 VIDEO VIDEO L R L IN FROM ANT RF R L R L OUT RF TO TV IN FROM ANT OUT RF RF IN To RF OUT RF Cable To ANT INPUT ANT TV To Method 1 Connecting to a video input jack Connect a video yellow cable between the VIDEO yellow OUT jack on DVD Rec...

Page 29: ...ted the S Video jack will have priority Line Selection will be automatically done Copy protected content cannot be recorded Note Method 2 Connecting a Camcorder to the LINE IN 2 jacks You can also use the LINE IN 2 jacks on the front panel of the DVD Recorder VCR You can record from connected equipment When an input source is inserted into LINE IN 2 while viewing TV the input will be switched to L...

Page 30: ...the AUDIO VIDEO LINE IN 1 jacks This allows you to connect your DVD Recorder VCR to other external devices and view or record their outputs Method 1 Connecting a VCR Set Top Box STB or DVD player to the AUDIO VIDEO LINE IN 1 jacks Method 2 Connecting a Camcorder to the LINE IN 2 in jacks Method 3 Connecting a Camcorder to the DV IN jack Connecting a VCR or external device to AUDIO VIDEO LINE IN 1 ...

Page 31: ...ds the television 3 Hold down the TV button and enter the two figure code corresponding to the brand of your television by pressing the appropriate numeric buttons Result If your television is compatible with the remote con trol it will switch off It is now programmed to operate with the remote control You can then control the television using the following buttons Brand Codes Brand Codes SAMSUNG ...

Page 32: ...mode 1 Select Setup Using the buttons move the selection bar to Setup then press ENTER to select 2 Select Clock Set Use the buttons to highlight Clock Set then press the ENTER button 3 Select Manual Clock Set Move the highlight to Manual Clock Set then press the ENTER button The Clock Set will change as shown 4 Note Auto Clock Set This menu is used to set the current time You need to set the time ...

Page 33: ...ess right button to select from the following options Antenna Select if the DVD Recorder VCR is con nected to an indoor or outdoor VHF UHF Antenna Cable TV Select if the DVD Recorder VCR is connected to Cable TV 4 Set the Clock Use the LEFT RIGHT buttons to select each of the following options then use the buttons to set each option Month Set the month Day Set the day Year Set the year Hour Set th...

Page 34: ...brightness of the screen 0 IRE This is the standard NTSC reference black level for consistent bright ness contrast across all sources 7 5 IRE This will enhance the black level for increased brightness contrast when viewing DVDs 3D NR Noise Reduction On Select to reduce noise from the screen Off Normal Note Note Note Digital Output Setting Up the Audio Options Use the buttons to select the desired ...

Page 35: ...or all available channels in the selected Tuner Band This procedure may take a few minutes to complete When finished the lowest channel found will be displayed Press ENTER button to STOP or cancel scan ning 4 Select Rating Level you want using buttons then press the or ENTER button For example if you select up to Level 6 discs that contain Level 7 8 will not play Larger number indicates the progra...

Page 36: ...ing the button Then press ENTER to change 5 Change TV Channel A message will appear on your TV When the mes sage disappears change your TV to channel 3 or 4 to match the RF output channel of the player 6 DVD VIDEO Channel Add Delete Use this feature if Auto Channel Search missed a channel that you would like to add and delete a channel you wish to remove Open MENU With the DVD in stop mode press t...

Page 37: ...e Tape Length This information is usually printed on the tape box The menu cycles through T 120 T 160 or T 180 Once the type of cassette is set the VCR can display the amount of time remaining on the tape when you press the INFO button 4 n Select Auto Play Move the selection bar to Auto Play then press right button to select from the following options On The VCR will automatically begin playing a ...

Page 38: ...46 Changing the camera angle 47 Using the Bookmark 48 Zooming In 49 Check Remaining Time 50 Using the Disc and Top menu 50 Playing Back an Audio CD CDDA 51 Play Option Mode 52 To Program Tracks 53 Picture CD Playback 54 Playing back an MP3 CD 55 Using PIP 56 Playing a VHS tape 57 Tracking 57 Special VCR Playback Features 58 S VHS Playback 58 Variable Search System 59 Front Display You can set the ...

Page 39: ...pecially careful that children s fingers are not caught between the disc tray and the tray chassis when it closes After turning power on it will take a few seconds until the DVD operates CAUTION Press the OPEN CLOSE button 1 Place a disc gently into the tray with the disc s label facing up 2 Playing a Disc Discs that cannot be played DVD Video with a region number other than 1 or ALL 3 9 GB DVD R ...

Page 40: ...button on the remote for more than 1 second Each time you press the button Slow X 1 8 Slow X 1 4 Slow X 1 2 Each time you press the button Slow X 1 8 Slow X 1 4 Slow X 1 2 To return to normal speed playback press the II button Step Motion Play DVD VIDEO DVD RAM DVD RW DVD R During pause mode press the F ADV button on the remote Each time the button is pressed a new frame will appear To return to n...

Page 41: ...ton at the point where you want the repeat play to start A and then press the ENTER button at the point where you want the repeat play to Stop B Your DVD Recorder VCR will playback the select ed section repeatedly 4 44 English Using Repeat Play For DVD VIDEO DVD RAM DVD RW DVD R DVD VIDEO only supports chapter repeat Repeat Play Press the QUICK button 1 Use buttons to select Repeat and use button ...

Page 42: ...type DVD subtitles may overlap with your TVs subtitles If this occurs disable the caption function on your TV Some discs allow you to select languages from the disc menu only 2 Press the QUICK button when the Angle is shown on the screen during playback 1 Use to select Angle and use button to select the desired angle 2 When a DVD contains multiple angles of a particular scene you can select the An...

Page 43: ...W VR Up to 99 scenes can be marked If you press the ENTER button during playback book marks are saved in the order of title Bookmarking with DVD RAM DVD RW VR disc Playing Back a Bookmark Zooming In Press the QUICK button during playback 1 Use buttons to select Zoom and then press the ENTER button will be displayed 2 Press buttons to move to the area you want to enlarge 3 Press the ENTER button Th...

Page 44: ...e selected track song 3 Playing Back an Audio CD CDDA Press buttons to select the track song to start playback from and then press the ENTER button You can also select the track song by pressing the number buttons on the remote 2 Insert an audio CD CDDA into the disc tray The audio CD menu appears and the tracks songs are played back 1 Each disc has a variety of menu functions available Title List...

Page 45: ...ss the ENTER button The play option screen will appear 2 During Playback repeat mode will be highlighted During Stop Play option will be highlighted To Program Tracks You can register a maximum 30 tracks in the playlist 1 Press the QUICK button Repeat Mode will be highlighted 2 Select Play Option using the buttons 3 Press the ENTER button The play option screen will appear Select Playlist using th...

Page 46: ...ss the ENTER button Returns to the Album screen The unit enters slide show mode Before the slide show can begin the photo interval slide show speed must be set Each title the ENTER button is speed the picture rotates 90 degree clockwise Each time ENTER button is pressed the photo is enlarged up to 4X Normal 2X 4X 2X Normal 4 Photo CD Playback Insert a photo CD JPEG into the disc tray 1 The screen ...

Page 47: ...n turn on the Auto Play to enable the VCR deck to play automatically when you insert a videotape that is missing the Record Safety Tab See pages 36 37 Playing the VCR The Tracking adjustment removes almost the white lines that sometimes appear during playback because of slight dif ferences in recording decks The TRK button will automati cally align the recorded tracks with the playback heads to so...

Page 48: ...can Highlight Forward Intro Scan then press the ENTER button Reverse Intro Scan Highlight Reverse Intro Scan then press the ENTER button 3 Use this feature when you want to search for the 0 00 00 counter position on a cassette Press the CLEAR button at the point on the tape where you want to set the counter to 0 00 00 While a cassette is stopped press the QUICK but ton The VCR will rewind or fast ...

Page 49: ... various DVD recording methods Before Recording This unit can record on various types of discs Before recording read the following instructions and select the disc type according to your preference Recordable discs This recorder can record on the following discs Disc Types Recording Recording Device Finalizing Additional Recording in format the DVD Recorder VCR DVD RAM VR Mode VR Mode V Mode V Mod...

Page 50: ...atted Make sure to format your unformatted discs before recording Press the OPEN CLOSE button and place a record able disc on the disc tray 1 Press the CHANNEL button to select the channel you want to record 2 Press the REC Speed button on remote control to select the recording speed quality XP High approx 1 hour SP Standard approx 2 hours LP Low approx 4 hours EP Extended Play approx 6 hours 3 RA...

Page 51: ...Start End Type Mode Edit SP 01 DVD CH 34 01 04 07 55PM 12 10AM 02 Once MOVER SELECC VOLVER SALIDA DVD RAM VR Turn the power off to finish the timer recording will blink if disc or tape is not inserted 4 The timer recording time may differ from the set time depending on disc status and overall timer recording status for example recording times overlapping or when the previous recording ends within ...

Page 52: ...set ting 6 Press the button to select scheduled Record List and then press the ENTER or button Press the MENU button 1 Timer Record Timer Record Scheduled Record List Setup Timer Rec Copy Title List Playlist Disc Manager MOVE SELECT RETURN EXIT DVD RAM VR VCR Plus Record Press the button to select Timer Rec and then press the ENTER or button 2 3 Editing the settings for a timer recording Editing T...

Page 53: ...Record Safety Tab If the tab is missing you can cover the opening with a small piece of tape Do not cover this opening unless you are sure you want to record over the tape Note Pause Resume Recording Press the REC PAUSE button Press REC again to resume 4 Stop Recording Press the STOP button 5 Note Also refer to the user manual for your External Devices when recording through Line In mode using Aud...

Page 54: ...he VCR and start playback Only if tape is missing the safety tab 2 Add Recording Time Refer to the One Touch Recording OTR 3 Recording DVD and VCR at the same time You can record DVD and VCR at the same time but both modes must be set up to record separately Press the DVD VCR button to set the unit to DVD or VCR mode Choose Line input mode Ch Line1 Line2 or DV for DVD or VCR Choose REC mode for DV...

Page 55: ...position 2 VCR DVD 00 00 21 Start End 00 00 25 PLAY Copy All DVD RAM VR Select the End position in the same way A copylist will be generated In VCR mode the copylist cannot be saved 3 VCR to DVD Select VCR DVD to copy VCR to DVD VCR DVD scene will be displayed Check the remaining time on the disc 1 DVD RAM VR Copy Disc Manager DVD VCR VCR DVD VCR DVD 00 00 21 Start End 02 00 01 04 PLAY 00 01 04 Co...

Page 56: ...corded if one title is deleted that title cannot be played again Note Press the button to select an entry to edit and then press the ENTER or button Play Playbacks the selected entry Rename Renames the title of the selected entry Delete Deletes the selected entry from the list Edit Deletes a desired section DVD RAM DVD RW VR mode Protect Locks or unlocks the selected entry 1 Press the MENU button ...

Page 57: ...a blank and moves the cursor to the right Delete Deletes the character at the cursor posi tion Clear Deletes all the character inputs Save Registers the character inputs 5 Press the arrow buttons to select Save and then press the ENTER button The changed title is displayed on the title item of the selected entry 6 DVD RAM VR Press the button to select Play and then press the ENTER button The selec...

Page 58: ... to unlock Title Protection 5 Follow these directions to delete an entry from the Title List Insert the recorded disc Press the MENU button 1 Press the button to select Title List and then press the ENTER or button or press the TITLE LIST button on the remote control The View Title List screen is displayed 2 Press the button to select an entry you want to delete from Title List and then press the ...

Page 59: ...be at least 5 seconds long If the length of the section to delete is less than 5 seconds you will be prompted with the message The range is too short If the end time precedes the start time you will be prompted with the message End point cannot be marked earlier than start point Note Follow these directions to delete a section from a Title List entry Insert the recorded disc Press the MENU button ...

Page 60: ... then press the ENTER or button or press the PLAY LIST button on the remote con trol The Edit Playlist screen is displayed 3 Press the button to select an entry title you want to edit from the Playlist and then press the ENTER or button The Edit Playlist menu is displayed Play Rename Edit Scene Copy Delete 4 VR mode Search the end point of the section from which you want to create a new scene usin...

Page 61: ...en press the ENTER button The image and time at the start point are displayed on the Start window 4 Press the arrow buttons to select save and then press the ENTER button The Name you changed is displayed on the title item of the selected playlist entry 3 Renaming Playlist Entries Press the button to select Rename and then press the ENTER button The Rename screen is displayed 1 Select the desired ...

Page 62: ...en press the ENTER button The scene you wanted to modify is changed with the selected section If you want to cancel a modification select cancel and then press the ENTER button 6 C Moving a Scene Changing the Position of a Scene Press the arrow buttons to select the scene you want to move change the position and then press the ENTER button 1 Press the buttons to select Move and then press the ENTE...

Page 63: ... when the disc is stopped 1 Press the button to select Playlist and then press the ENTER or button 2 Press the button to select Edit Playlist and then press the ENTER or button or press the PLAY LIST button on the remote control The Edit Playlist screen is displayed 3 Press the button to select an entry title you want to copy to the VCR and then press the ENTER or button The Edit Playlist menu is ...

Page 64: ...Do you want to format disc If you press ENTER you will be prompted with the confirmation message All data will be deleted Do you want to continue 3 Use these instructions to format a disc The cartridge write protect tab should be set to the unprotect position The disc protection should also be cleared Press the arrow buttons to select Save and then press the ENTER button A disc name is given to th...

Page 65: ...he confirmation mes sage Do you want to delete all title lists You cannot delete a protected entry If you want to delete a protected entry disable Protection for it on the Lock item Disc Protection When Protected or Cartridge Protection has been set or when a DVD RAM is used data cannot be deleted from a disc 3 Press the buttons to select Yes and then press the ENTER button The disc is deleted 4 D...

Page 66: ...nfinalize and then press the ENTER or button You will be prompted with the message Do you want to unfinalize disc If you select Yes you will be prompted again with the message Disc will be unfinalized Do you want to continue 3 Press the buttons to select Yes and then press the ENTER button The disc is unfinalized A DVD RW can be finalized or unfinalized in Video mode Finalize Unfinalize Mark DVD V...

Page 67: ...ection of arrow Fig 5 1 Cabinet Top Removal 5 1 2 Ass y Bottom Cover Removal Œ RELEASE 3 HOOKS REMOVE 8 SCREWS Bottom View Fig 5 2 Ass y Bottom Cover Removal RELEASE 3 HOOKS Bottom View Œ RELEASE 3 HOOKS Top View Fig 5 3 Ass y Front Panel Removal Top View 5 1 3 Ass y Front Panel Removal Fig 5 4 Ass y Front Panel Removal Bottom View ...

Page 68: ...REMOVE 4 SCREWS REMOVE 6 SCREWS ˇ REMOVE 4 SCREWS REMOVE 3 SCREWS ˆ REMOVE 3 SCREWS Ø REMOVE 2 SCREWS REMOVE 1 SCREW Fig 5 5 Chassis Removal 5 1 5 VCR Main PCB Removal Œ REMOVE 4 SCREWS MODE SWITCH When installing the ass y full deck on the Main PCB be sure to align the assembly point of mode switch ASSEMBLY POINT Fig 5 6 VCR Main PCB Removal ...

Page 69: ...Disassembly and Reassembly 5 3 5 2 Circuit Board Locations JACK PCB FRONT PCB KEY PCB VCR MAIN PCB DVD MAIN PCB Fig 5 7 Circuit Board Locations ...

Page 70: ...bly and Reassembly 5 3 VCR Deck Parts Locations 5 3 1 Top View ˆ Ø ˇ Œ Fig 5 8 Top parts Location 1 Œ GEAR FL CAM MOTOR LOADING ASS Y ˇ LEVER FL ARM ASS Y HOLDER FL CASSETTE ASS Y ˆ LEVER FL DOOR Ø SLIDER FL DRIVE ...

Page 71: ... Fig 5 9 Top Parts Location 2 Œ FE HEAD CYLINDER ASS Y ˇ ACE HEAD ASS Y LEVER UNIT PINCH ASS Y ˆ LEVER 9 GUIDE ASS Y Ø LEVER TENSION ASS Y BAND BRAKE ASS Y DISK S REEL LEVER S BRAKE ASS Y GEAR IDLE Ô LEVER IDLE LEVER T BRAKE ASS Y Ò DISK T REEL ...

Page 72: ...mbly 5 3 2 Bottom View Œ ˇ ˆ Ø Fig 5 10 Bottom Parts Location Œ GEAR JOINT 1 GEAR JOINT 2 ˇ BRAKET GEAR MOTOR CAPSTAN ASS Y ˆ LEVER T LOAD ASS Y Ø GEAR LOADING DRIVE LEVER S LOAD ASS Y HOLDER CLUTCH ASS Y BELT PULLEY SLIDER CAM ...

Page 73: ...s time you have to grasp the Lever FL Cassette R Continuously until the Holder FL Cassette Ass y Œ is taken out completely Note Be sure to insert Lever FL Cassette R in the direction of A to prevent separation and breakage of the Lever FL Cassette R at disassembling and reassembling RAIL B BOSS A LEVER FL CASSETTEE R A Œ HOLDER FL CASSETTEE ASS Y Fig 5 11 Holder FL Cassette Ass y Removal 5 4 2 Lev...

Page 74: ...e Gear FL cam Note When reinstalling be sure to reassemble Slider FL drive Œ after you insert the Boss of Lever FL ARM R in Groove of Slider Fl drive Œ Assembly Align the Gear FL Cam Œ with the Gear worm wheel Post as shown drawing Refer to Timing point Œ SLIDER FL DRIVE GEAR FL CAM Fig 5 14 Slider FL Drive Removal 5 4 3 Lever FL Door Removal 1 Release the Hook and Remove the Lever FL Door Œ in th...

Page 75: ... WORM WHEEL Fig 5 16 Gear Worm Wheel Removal 5 4 6 Cable Flat Removal 1 Remove the Drum connecting part of Cable Flat Œ from Connector Waffer 2 Remove the Loading Motor connecting part of Cable Flat Œ from Connector Waffer ˇ ˇ CONNECTOR WAFER CONNECTOR WAFER Œ CABLE FLAT Fig 5 17 Cable Flat Removal ...

Page 76: ...t 2 as shown Fig 5 20 Refer to Timing point1 2 Confirm the Timing Point 2 of the Gear Joint 2 and Slider Cam ˇ Œ SCREW BRAKET GEAR GEAR JOINT 1 ˇ GEAR JOINT 2 Fig 5 19 Bracket Gear Gear Joint 1 2 Removal Œ GEAR JOINT1 GEAR JOINT2 ˇ SLIDER CAM TIMING POINT 1 TIMING POINT 2 Fig 5 20 Gear Joint 1 2 Assembly 5 4 7 Motor Loading Ass y Removal 1 Remove the screw Œ 2 Remove the Motor Loading Ass y MOTOR ...

Page 77: ...wn in drawing Refer to Timing Point 3 LEVER LOAD S Œ LEVER LOAD T PIN A PIN C PIN B PIN D ˇ SLIDER CAM TIMING POINT 2 TIMING POINT 1 TIMING POINT 3 Fig 5 22 Gear Loading Drive Slider Cam Lever Load S T Ass y Assembly 5 4 9 Gear Loading Drive Slider Cam Lever Load S T Ass y Removal 1 Remove the Belt Pulley Refer to Fig 5 38 2 Remove the Gear Loading Drive Œ after releasing Hook A in the direction a...

Page 78: ...to apply Grease on the post 2 Take care not to touch stain on the felt side and not to be folder and broken Band brake Ass y 3 After Lever Tension Ass y seated Rotate stopper of Main Base to the Mark B STOPPER MARK B A Œ SPRING TENTION LEVER LEVER TENTION ASS Y ˇ BAND BRAKE ASS Y Fig 5 24 Lever Tension Ass y Band Brake Ass y Removal 5 4 11 Lever Pinch Drive Lever Tension Drive Removal 1 Remove the...

Page 79: ... A HOOK C B Fig 5 26 Gear Idle Ass y Removal 5 4 13 Lever Brake S T Ass y Removal 1 Release the Hook A and the Hook B C in the direction of arrow as shown in Fig 5 25 2 Lift the Lever S T Brake Ass y Œ with spring brake ˇ Assembly 1 Assembly the Lever S Brake Ass y Œ on the Main Base 2 Assembly the Lever T Brake Ass y with spring brake ˇ Note Take extreme care not to be folded and transformed Spri...

Page 80: ...tch Ass y down with exces sive force Just insert Holder Clutch Ass y into post center with dead force and Rotate it smoothly Be sure to confirm that spring is in the slit of Gear Center Ass y as shown in detail B Œ DISK S REEL DISK T REEL Œ WASHER SLIT HOLDER CLUTCH ASS Y DETAIL A BAD SPRING GOOD BAD SPRING GOOD DETAIL B Fig 5 27 Disk S T Reel Removal Fig 5 28 Holder Clutch Ass y Removal 5 4 15 Di...

Page 81: ...oles on Main Base as shown in Fig 5 30 2 Lift the Lever Up Down Ass y Œ about 35 Refer to Fig 5 30 3 Insert Ring of the Gear Center Ass y in the Guide of the Lever Up Down Ass y Œ 4 Insert the Gear Center Ass y in the post on Main Base 5 Push down the Lever Up Down Ass y Œ for locking of the Hook Note 1 Take care not to separate and sentence does not mark sense 2 Be sure to confirm that Ring of th...

Page 82: ...grease on the post pinch roller ˇ SPRING PINCH DRIVE Œ LEVER UNIT PINCH ASS Y PLATE JOINT Fig 5 32 Lever Unit Pinch Ass y Plate Joint Spring Pinch Drive Removal 5 4 20 Lever 9 Guide Ass y Removal 1 Remove the Spring 9 Guide Œ 2 Lift the Spring 9 Guide Ass y in the direction of arrow A Note 1 Take extreme care not to get grease on the tape Guide Post 2 After reinstalling check the bottom side of th...

Page 83: ...moval 1 Pull out the FPC from connector of ACE Head Ass y 2 Remove the screw Œ 3 Lift the ACE Head Ass y Œ SCREW HEAD ACE ASS Y Fig 5 35 ACE Head Removal 5 4 21 FE Head Removal 1 Remove the screw Œ 2 Lift the FE Head Œ FE HEAD Fig 5 34 FE Head Removal ...

Page 84: ...e Cylinder Ass y ˇ Assembly 1 Match the 3 holes in the bottom of Cylinder ass y ˇ to the 3 holes of Main Base as attending not to drop or knock the Cylinder ass y ˇ 2 Tighten the 1 Screw Œ 3 Match the Plate Ground Deck to the Hole of Base Main 4 Tighten the other 2 Screws Œ Note 1 Take care not to touch the Cylinder Ass y ˇ and the tape guide post at reinstalling 2 When reinstalling Don t push dow...

Page 85: ...tightening screws check if there is gap between the head of screws and the top side of Main Base There should have no gap between the head of screws and the top side of Main Base After reinstalling adjusting the tape transport system again A B C MOTOR CAPSTAN ASS Y Œ 3 SCREWS Fig 5 39 Motor Capstan Ass y Removal 5 4 25 Hook Capstan Belt Pulley Removal 1 Remove the Hook Capstan Œ after realeasing H...

Page 86: ... Refer to Fig 5 43 If you rotate Gear Worm Œ continuously when tape is in state of unwinding you may cause a tape contamination by grease and tape damage Be sure to wind the unwinded tape in the state of set horizently 3 Rotate Gear Worm Œ clockwise using screw driver again up to the state of eject mode and then pick out the tape Refer to Fig 5 42 FRAME 5 4 27 Post 8 Guide Ass y Removal 1 Rotate t...

Page 87: ...HAFT CAPSTAN SHAFT 9 GUIDE POST 3 GUIDE POST GUIDE ROLLER S T O O O O O O O CYLINDER ASS Y O O O O O O O O O FE HEAD O O O O O O O ACE HEAD O O O O O O O O O PINCH ROLLER O O O O O O O O O POST REEL S T SLEEVE TENSION POST CENTER LEVER IDLE BOSS 2Point CAPSTAN MOTOR PULLEY O O O O O BELT PULLEY O O O O O O O HOLDER CLUTCH ASS Y O O O O O O O O O GEAR CENTER ASS Y O O O O O O O O O GEAR IDLE 2Point...

Page 88: ...5 22 Disassembly and Reassembly MEMO ...

Page 89: ...hen replacing the cylinder ass y be sure to adjust the X Point and Head switching adjustment 4 How to adjust Intermittently short circuit the Test Point on Main PCB with pincers to the adjustment mode If the corresponding adjustment button is pressed the adjustment is performed automatically When the adjustment is completed be sure to turn the power off 6 1 1 a Location of adjustment button of rem...

Page 90: ...6 2 Alignment and Adjustments 6 1 1 b TEST location for adjustment mode setting Fig 6 2 VCR Main PCB Top View Short Circuit for few seconds and release Just one time ...

Page 91: ...ding model with buttons on the remote control 4 After selecting the option number is completed press the button of remote control If button is pressed the selected number is changescolor See Fig 6 4 5 Press the ENTER button of remote control again to store the option number 6 Turn the Power off 1 NVRAM Option is adjusted in the factory 2 In case Main PCB Micom IC601 and NVRAM IC603 EEPROM are repl...

Page 92: ...or the transport adjustment To maintain the height of the tape guide and prevent damage do not apply excessive force onto the main base Fig 6 5 Location of Tape Transport Adjustment Fig 6 6 Tape Travel Diagram CYLINDER ASS Y TAKE UP REEL DISK 8 GUIDE POST 9 GUIDE POST SUPPLY REEL DISK CAPSTAN PINCH ROLLER GUIDE ROLLER T GUIDE ROLLER S FULL ERASE HEAD 3 GUIDE POST TENSION POST HEIGHT SCREW TILT SCR...

Page 93: ...ll observed at the tape guide perform the tilt adjustment of the ACE head 1 ACE Head Assembly Adjustment a ACE HEAD HEIGHT ADJUSTMENT 1 Run the alignment tape Color bar in the playback mode 2 Observe surface of the audio head using a dental mirror 3 Turn screw C clockwise or counterclockwise until the gap of lower tape edge and the lower edge of the control head is about 0 25mm Refer to Fig 6 7 an...

Page 94: ...e of tape guide as shown in Fig 6 9 B 3 If a curl or wrinkle of the tape occurs slightly turn the screw A tilt adjust on the ACE head ass y 4 Reconfirm the ACE head height Fig 6 9 Tape Guide Check c AUDIO AZIMUTH ADJUSTMENT 1 Load alignment tape Mono scope and playback the 7KHz signal 2 Connect channel 1 scope probe to audio output 3 Adjust screw B to achieve maximum audio level See Fig 6 7 A B BA...

Page 95: ...adjustment operates automatically See Fig 6 1 4 Connect the CH 1 probe to Envelope the CH 2 probe to H D switching pulse and then trigger to CH 1 5 Insert the driver into the X Point adjustment hole and adjust it so that envelope waveform is maximum Test point TP2 Audio Output TP3 Envelope TP4 H D S W Trigger TP5 Control Pulse Fig 6 10 Location of Test point VCR Main PCB Top View AUDIO OUTPUT CONT...

Page 96: ...te a Maximum output of the video RF envelope b Minimum output of the video RF envelope at the entrance side c Minimum output of the video RF envelope at the center point d Maximum output of the video RF envelope at the exit side 4 If the section A in Fig 6 12 does not meet the specification adjust the guide roller S up or down 5 If the section B in Fig 6 12 does not meet the specification adjust t...

Page 97: ... the Envelope and CH 2 to the H D SW Pulse for triggering 8 Turn the guide roller heads with a flat head driver to obtain a flat video RF envelope as shown in Fig 6 13 Fig 6 13 Guide Roller S T Height Adjustment IDEAL ENVELOPE SHEIGHTTOOHIGH SHEIGHTTOOLOW THEIGHTTOOHIGH THEIGHTTOOLOW GUIDE ROLLER S GUIDE ROLLER T ...

Page 98: ... Video Envelope Rising when Operation mode Changes from RPS to Play Mode 4 Envelope Check 1 Make recordings on T 120 E 120 and T 160 E 180 tape Make sure the playback output envelope meets the specification as shown in Fig 6 15 2 Play back a self recorded tape recording made on the unit using with T 120 E 120 The video envelope should meet the specification as shown in Fig 6 15 In SP mode A should...

Page 99: ...ves the disk reel S T through gear idler by rotation of gear center ass y 3 Brake is operated by slider cam at FF REW mode 4 Transportation of accurate driving force is done by gears Gear Center Ass y Note If the spec does not meet the followings specifications replace the holder clutch ass y and then recheck MODE TORQUE g cm GAUGE PB 42 11 Cassette Torquemeter RPS 145 30 Cassette Torquemeter Tabl...

Page 100: ...6 12 Alignment and Adjustments MEMO ...

Page 101: ...switch Vin ON OFF Control Vs Ns Vreg REGULATOR Fig 7 1 7 1 2 Circuit description Control a AC Power Rectification Smoothing Terminal 1 BD01 Convert AC power to DC Wave rectification 2 CIS01 Smooth the voltage converted to DC 3 L1S02 C1S04 C1S05 Noise removal at power input output 4 R1S04 Rush current limit resistance at the momemt of power cord insertion Without R1S04 the bridge diode might be dam...

Page 102: ...1S08 and discharges to R1S02 R1S03 3 C1S38 For noise removal c IC1S01 Vcc circuit 1 R1S05 R1S07 R1S08 IC1S01 driving resistance IC1S011 works through driving resistance at power cord in 2 IS1S01 Vcc R1S06 D1S07 C1S09 Use the output of transformer as Vcc because the current starts to flow into transformer while IC1S01 is active Rectify to D1S07 and smooth to C1S09 Use the output of transformer as I...

Page 103: ...rcuit Smoothing Circuit Rectified Circuit Line Filter Power IN 120V Noise Removal SNUBBER PWM Control Circuit ICE2BSO1 Converter Voltage Detection Circuit 12V Rectified Smoothing Circuit 3 3V Rectified Smoothing Circuit 5V Rectified Smoothing Circuit 15V Rectified Smoothing Circuit 33V Rectified Smoothing Circuit 5V Rectified VoltageCircuit x3 9V Rectified VoltageCircuit 12V Rectified VoltageCircu...

Page 104: ...1 TVP5146 VIDEO DEC SDRAM I F AUDIO OUT HOST I F VIDEO OUT DIC1 DMN8602 A V CODEC DV I F AUDIO IN VIDEO IN Front Panel I F Y Pb Pr Y C CVBS I2S 32bit 16bit 8bit 12S ITU R656 ATAPI IEEE 1934 DV input block Audio input block Video input block Audio output block Video output block Fig 7 5 Main system control ATAPI interface with DVD Multi Drive A V Encoding Decoding Analog Progressive interlaced vide...

Page 105: ...ssors Two 32 bit SPARC processors one dedicated to video processing and the other assigned general system tasks and audio processing perform three classes of functions system processing audio processing and high level control flow and decision making tasks for video processing Optionally they can also perform 2D graphics and host functions The DMN8602 also support multiple video inputs windowed vi...

Page 106: ...eo Digital Encoder DENC The NTSC PAL digital video encoder DENC module converts a digital video data stream into NTSC or PAL composite or component video output The DMN 8602 DENC output can be in one of the following formats Baseband composite NTSC M or PAL B D G H I analog video Separate analog luma Y and chroma C output to support S Video Separate analog component video RGB or SMPTE YPbPr output...

Page 107: ...h error correction code ECC descramble process and error detection code EDC Second WS performs the following processes Delay compensation using Shift register Sample Hold pulse generation I V Gain Control Providing clock for RF chip OPC Control signal generation Lastly PRML completes the adaptive EQ VD and Digital PLL 4 D Chip D Chip consists of Servo DSP DP2 and 1Mbit memory Servo DSP is dealing ...

Page 108: ...CT XB0 Built in ATA PI IDE interface supports Ultra DMA modes 0 1 and 2 52x decoding speed 52x encoding speed supported with 33 8688Mhz 1Maximum transfer speed PIO mode 16 6 MB s with IORDY Ultra DMA 66MB s with DMARQ 2User can freely set the CD main channel C2 flag and subcode areas in buffer RAM 3Built in batch transfer function for transferring CD main channel C2 flag etc in a single operation ...

Page 109: ...rsion of 11bit analog Video signal converted into Digital Video signal ITU R656 Format is outputted via DIC1 MPEG2 Decoder Encoder with video Encoder of digital part Line 1 Rear Video Input CVBS 1 Line 2 Front Video Input CVBS 2 Y2 C2 SV1274 Analog Mux IC801 Video Decoder TIC1 A V CODEC DIC1 CVBS Y C ITU R656 10bit 27MHz V_SYNC SDA SCL RSTAV Fig 7 8 7 4 2 Analog Mux SV1274 IC801 is Analog Mux As P...

Page 110: ...our 10 bit 30 MSPS A D converters and A D conversion of 10bit analog Video signal converted into Digital Video signal ITU R656 Format is outputted via DIC1 MPEG2 Decoder Encoder with video Encoder of digital part The following output formats supply 10 bit 4 2 2 YCbCr to the DIC1 MPEG2 Decoder Encoder with video Encoder of digital part On CVBS and S video inputs the user can control video character...

Page 111: ...ve Video Output by the Front switch DIC1 adopts 10bit D A converter DIC1 perform video en coding as well as copy protection Fig 7 9 7 5 1 Outline DIC1 MPEG2 Decoder Encoder with video Encoder diverges from the 13 5MHz crystal then generates VSYNC and HSYNC DIC1 MPEG2 Decoder Encoder with video Encoder does RGB encoding copy guard processing and D A conversion of 10bit Video signal converted into a...

Page 112: ...l of video encoder output is only 1 1Vpp the level is adjusted with the special amplifier When mute of pin 5 is high active if the pin is floating and connecte to power the output signal is never ouputted CVBS Y C R Pb B Pr R outputted from video encoder are inputted to VIC1 Pin 2 8 6 16 14 The signal to which gain is adjusted by amplifier is outputted from jack via 75ohm Resistance VR11 VR16 ...

Page 113: ...e out terminal and two digital output terminal Decoded signal by DIC1 is inputted to AIC1 D A Converter then filtered and amplified by AIC4 OP Amp And the digital audio signal IEC 958 is drived by AIC3 inverter and ouputted in Optical Coaxial S PDIF terminal Line Input 1 Rear L1 in R1 in L2 in L2 in Line Input 2 Front TV Audio from MTS block RF R RF L IC801 SV1274 Multiplexer FIC1 micro controller...

Page 114: ...puts the detected output from the tape and mechanism protection sensor and protects the VCR and tape against abnormal operation Fig 7 11 is a simplified system control block diagram The system control is performed by 4 control sections System and timer control Servo control F S Tuner On Screen Display LED DISPLAY DVD BLOCK REMOCON SYSTEM CONTROL MECHA BLOCK Hi Fi MTS A V IC I O IC801 EPROM IC TM B...

Page 115: ...Circuit Operating Descriptions 7 15 Fig 7 12 IC601 Block Diagram ...

Page 116: ...ntrol the phase of drum and capstan motor 6 Record Safety Tap Detection Detects the safety tab on the rear of a cassette to prevent a prerecorded program from being erased 7 Loading Unloading control Controls a series of loading unloading operation after the u COM judges the operation mode and sets the mechanism to suitable mode Fig 7 13 show correlation between u COM and peripheral components dur...

Page 117: ...ve IC is designed to drive Loading Motor Capstan Motor Cylinder Motor in one IC See Fig 7 14 Table 2 Motor Control Logic POSION CAM S W START ACTION MODE A B C SEN STANBY 0 0 0 0 Eject POWER OFF 0 0 0 1 Unload POWER OFF LOADING START 0 0 0 1 Tape loading start point LOADING END 1 0 1 1 1 Tape loading end point REV 1 1 0 X Reverse picture search reverse SLOW PLAY 0 1 0 X Play Rec F PS Still SLOW F ...

Page 118: ...S 19 D MCOM 20 D VCO 21 D M T GND 22 D PGO1 23 D PGIN 24 D PGIN 1 HU 2 HU 3 F R 4 VCO B 5 RFS 6 RFP 7 M T GND 8 W OUT 9 V OUT 10 U OUT 11 LD L2 12 LD GND HV 48 HV 47 HW 46 HW 45 CFG D 44 Vcc 5V 43 CFG A 42 CFG IN 41 I LIM 40 F C 39 PWM 38 S GND 37 LD VREG 36 V CTL 35 D BFG 34 D PGO2 33 D CTL 32 LD IN 31 D C1 30 D C2 29 D F C 28 D CX 27 D VCOIN 26 D PCOUT 25 GND GND LB11885 48 SS0P R5 C13 R4 R3 C2 ...

Page 119: ...f IC601 A MUTE V lock is controlled by pin 24 of IC601 8 Forward Search Mode 7 Times play speed search in SP and SLP 21 times play speed search in SLP State input Press the fast forward button on the VCR front panel or the remote control in play or still mode Indication output FPS display in LED Module during 3 seconds Output at IC601 Pin 46 CAP F R H IC601 Pin 32 A MUTE H 9 Reverse Search Mode 7 ...

Page 120: ... IC601 Pin 46 CAP F R H 13 Record Pause Mode The pinch roller is released from the capstan shaft in a moment The brake is applied to the take up reel to prevent tape slack during the record pause mode State input Press button in the record mode Note Inoperative during recording and XPR mode Indication output PAUSE display in LED Module 14 Fast Forward Mode Tape fast forward operation using capstan...

Page 121: ... play the VCR enters the reel emergency mode The VCR maintains the unload power on state in the reel emergency Fig 7 15 Reel and Cylinder Lock T END S END Sensor R607 R606 65 82 2 1 R604 R603 R602 R601 R605 C602 18 Cylinder Lock Sensor If the frequency of D FG is less than 230Hz or more than 430Hz during 500msec and such stuation occurs 3 times contined micom makes the VCR drum emergency 19 Tape E...

Page 122: ...e tape direction so the counter counts up when the CAP F R signal is Hi and the counter counts down when the CAP F R signal is Low By counting the control pulse the counter data is supplied to the VF display Counter displays the time and it is increased or decreased by one minute after counting 1800 control puls es Counter mode is switched to clock mode when the display button is pushed or when th...

Page 123: ...rator inside of the u COM counts the oscillation signal of XT601 for the timer clock data 23 Power Failure Detection u COM goes to the power failure mode when the 88 port is lower than 4 5 of AD Vcc level 24 4H D Control During trick play still slow F advance it is necessary to control pre amp video circuit the micom control pin 98 C ROTARY pin 99 HD AMP of the IC601 during PB period in Slow mode ...

Page 124: ...ase and speed of the cylinder motor The speed is kept at a constant 1800 RPM and the phase determines the mechanical position relative to the vertical Sync signal The capstan servo loop controls the phase and speed of the capstan motor so that the video head can trace the video track correctly It keeps tape speed constant according to the mode SP SLP during playback and recording Table 3 Servo Sys...

Page 125: ...PBCTL amplifier RECCTL head Kp Kp Kv Kv Drum speed gain Drum phase gain Capstan phase gain CFG amplifier VSYNC separation circuit composite sync signal Vertical sync signal DPG comparator DFG amplifier PWM conversion Motor driver Motor driver Carrier rejection filter Carrier rejection filter M Drum motor M Capstan motor CFG signal DPG signal DFG signal Remark The broken line indicates the internal...

Page 126: ... devided CFG signal And than it does in playback mode by comparing HD S W which is synchronized with DFG and DPG with PB CTL signal The latch signal for the phase error data in record mode is the devied CFG signal which is devided from the CFG signal in the CFG frequency devider to a frequency of 30HZ In playback the latch signal is the devied CFG signal obtained by frequency division from the ris...

Page 127: ...in a digital filter this filter controls a pulse width modulated PWM output which controls the rotation phase and speed of the drum When the error is zero the PWM circuit outputs a waveform with a 50 duty cycle The phase counter error detector compares the phase of the DPG pulse tach pulse which contains video head phase information with a reference signal In the actual circuit the comparison is c...

Page 128: ...ears at pin 26 after being amplified at the internal video amp and driver The output signal from the clamp circuit enter the detail enhancer circuit In the detail enhancer circuit the low level high frequency video signal is emphasized to improve the original signals frequency characteristics onlinear emphasis circuit is employed to improve S N and frequency response characteristics together with ...

Page 129: ...ak The actual device which constitutes the FM modulator is a stable multivibrator This multivibrator generates a sine wave output of variable frequency The frequency of sine wave is governed by the level of the processed video signal at any given point Therefore the processed video signal varies the frequency of the sine wave which is frequency modulation FM During playback in SLP mode the crossta...

Page 130: ...s signal is applied to FM AGC 2 FM AGC AMP At the FM AGC Amp FM signals are automatically balanced One of the AGC circuit outputs is fed to AGC detector circuit which detects signal level fluctuations The detector output signal is applied to the FM AGC Amp to keep the output constant This output is applied to the PB FM EQ block FM EQ is correct the phase distortion and level The signal through PB ...

Page 131: ...this circuit returns the emphasized high frequency component to the original value 6 Non Linear De Emphasis Circuit This circuit is the counter part of the dynamic pre emphasis circuit during recording The characteristics are also the opposite of those in recording 7 Drop Out Compensator YNR Circuit This circuit compensated for missing parts of the FM signal due to dust dirt on the tape or irregul...

Page 132: ...tput components which are the added frequency of 4 21 3 58 7 8MHz and the difference frequency component 629KHz Added frequency is rejected by the 1MHz LPF and the 629KHz down converted chroma signal is supplied to the luma chroma mixer of pre amp block and then recorded on the tape via the record amp and heads AFC detection is performed with the head switching pulse and the fh signal generated fr...

Page 133: ... content itself during SP and SLP provides a some what better S N ratio 3 Four 4 Phase Rotation CH1 is advanced 90 every channel while CH2 is delayed 90 When the frequency is set to 629KHz if phase is shifted by 90 it becomes 629KHz 90 The 40fh 90 629KHz 90 is balanced modulated via fsc 3 58MHz depending on which side band is detected That is the fs 40fh 90 4 2MHz 90 of total frequen cy is supplie...

Page 134: ... and converted into 4 21MHz 629KHz signals 2 Main Converter Inside of IC the main converter converts the 629KHz rotational chroma signal to a 3 58MHz non rotational signal The two inputs of this main converter are the 629KHz signal which comes from the output of the ACC and a 4 21MHz which has the same rotational phase as the 629KHz signal It is important that the rotational phase of the 4 21MHz s...

Page 135: ...C OUT X TAL OSC fs BPF fh 1 8 D C VC0 320fh LPF MAIN CONV SUB CONV BPF PB COLOR IN fs 3 58MHz 320fh 5 03MHz fh 15 734 KHz fs 3 579545MHz 40th 629KHz fs 40th 3 58MHz 0 62MHz 4 2MHz 40th 629KHz PB OUT X TAL OSC fs BPF fh 1 8 D C VC0 320fh Fig 7 22 Block Diagram of Color REC mode by the method of a Down Converter Fig 7 23 Block Diagram of Color PB mode by the method of a Down Converter ...

Page 136: ...rcuit REC EQ circuit and a PB EQ circuit Hi Fi and Linear audio share the same input selector output selector and mute circuit 1 REC Mode L CH Only IN SEL REC AMP INPUT ALC LPF PNR MOD 26 REC FM OUT SEL CONV LINEAMP 80 LINE OUT LINEAR IN LINEAR OUT 4 6 PRE AMP INPUT 33 34 BPF DEMOD LPF PNR CONV LINEAMP 80 LINEAR IN OUT SEL 4 LINE OUT Fig 7 24 REC Mode L CH Only Fig 7 25 PB Mode L CH Only 2 PB Mode...

Page 137: ...ion PNR operates as that of VHS FORMAT to reduce noise 6 Audio Limiter Before modulating the signals from PNR block it limits signals exceeding the size limit to max deviation of 150KHz 7 VCO Voltage Control Oscillation It is a modulation functionthat oscillates 1 3MHz L CH and 1 7MHz R CH 8 RF LPF It is a function to eliminate the harmonic components of Hi Fi carrier formed during VCO which may a...

Page 138: ...pe it s size the signal passing through BPF is below 10mVpp it is not Hi Fi therefore it output linear 16 DOC Drop Out Compensation If demodulation is conducted without properly treating the damage on Hi Fi envelope caused by scratch on the tape noise occurs In order to improve this noise occurrence DO DET compensate the drop out using the same methode of compensating the switching noise when the ...

Page 139: ...ply for in out Select 16 1 2 Vcc 2 5 V 1 2 Vcc Terminal 17 Rec Mute Terminal 0 V GND Not in use 18 NR Waiting Det Terminal for waiting dector 19 NR Waiting Filter 2 5 V NR Waiting Filter 1 For L CH 20 NR Waiting Filter 2 5 V NR Waiting Filter 2 For L CH 21 CCA Reference CCA Reference for L CH 22 NR Empha NR Empahasis for L CH 23 Tracking DC out 0 5 v Hi Fi Env Det Level Output 24 Audio Pb FM1 2 V ...

Page 140: ...Block 58 REG Filter 4 5 V Filter of reference voltage source 59 Filter Auto Adjust 3 8 V Loof filterof PLL for auto adj 60 Pilot Det Filter 3 8 V Detection for pilot detection circuit 61 PC_DC_MO 3 3 V Absorbing the DC offset 62 PCDOUT 3 8 V Absorbing the DC offset 63 PCDIN 3 8 V Absorbing the DC offset 64 PCDBXIN 2 6 V Absorbing the DC offset 65 Main V I convert 3 8 V Converting the voltage of si...

Page 141: ...d uses magnetic recording device it only records limited size and as the size of input signal increases distortion increases To prevent this occurance mark sure the signal does not get bigger even if the level of distortion repodly increases 3 LINE AMP Line amp s gain is approximately 23dB The purpose of the line amp is to amplify to 68dB in order to obtain the recorded signal on the tape during p...

Page 142: ...igning rec amp The REC amp should be the opposite to playback characteristics OUTPUT PB AMP INPUT R1 R2 Fig 7 28 REC Amp 7 OSC Oscillation Oscillation frequency is 70KHz It s size is approximately 45Vp p it operates on recoed mode It is supplied to audio erase head and full erase head used to erase already recorded signals Also it conducts AM Amplitude Modulation using oscillation signals 8 BIAS C...

Page 143: ...t HPF 11 BIAS CTL REC 4 3V The BIAS CTL voltage change depends on the PB 5V external TR 6 PB EQ 2 3 PB EQ AMP INPUT 5 PB EQ 2 3 PB EQ AMP INPUT 7 PB EQ SW 2 3 PB EQ AMP SLP SW 3 PB EQ OUT 2 3 32dBm PB EQ AMP OUTPUT 2 LINE PB IN 2 3 32dBm LINE AMP INPUT PB 58 A MUTE 0 Operates at HIGH 5V 76 INPUT 1 2 3 27dBm AUDIO INPUT 27dBm 78 INPUT 2 2 3 27dBm AUDIO INPUT 27dBm 1 Vref Filter 2 3 80 Input 3 2 3 2...

Page 144: ...sing circuits 2 Tuner modulator block As explained this model is designed in one package to contain a RF MODULATOR BLOCK TUNER BLOCK AND IF DEMODULATOR BLOCK Its size is greatly reduced and other noise interference can be minimized to make performance high Fig 7 29 Tuner demodulator Block Diagram ANT INPUT MODULATOR SECTION TUNER SECTION IF SECTION ANT OUT Off through SW VHF RF AMP UHF RF AMP UHF ...

Page 145: ...cteristic which results in a better band characteris tic D MOP IC Mixer OSC PLL It consists a VHS and UHF OSC and mixer circuit We applied a double balance mixer to have better rejection characteristic it shows especially various beat characteristic It serects channels and contains charge pump band driver The minimum step standard frequency 31 25KHZ AGC from IF Section Prescaler REF C P LPF Tu vol...

Page 146: ...After removing AM signal in the limiter AMP amplified SIF signal is applied FM detector This FM detector is PLL detecting type E AFT DETECTER AFT automatically controls the OSC frequency in the tuner so that it retains a constant level It is a quadrature detection type The carrier which is detected from video det is directly input to AFT detector The 90 degree delayed phase signal is input at the ...

Page 147: ...if no sync is detected a blue screen is displayed In other word the OSD circuit displays character on the video when there is a video signal or on blue screen when there is no video signal No sync 49 CVin 4 2 fsc oscilator Sync signal generator H Background video signal CVout Blue Background Super impose IC601 Dot display control Character data ROM 128 characters Control circuits display position ...

Page 148: ...Circuit Operating Descriptions 7 48 MEMO ...

Page 149: ...1 the mechanism of VCR is configured with five main blocks and each operation is precisely controlled by the microcomputer built in the system control section First load a video cassette tape in VCR 1 The cassette is automatically set on the reel disc 2 The tape is pulled out from the cassette and wrapped around the cylinder 3 The cylinder turns in a constant speed rate synchronizing with the vert...

Page 150: ...oduce a control signal at lower side of the tape and an audio erase head to erase only the audio signals and perform after recording in parallel with the audio head are provided at T reel side tape exit side of the cylinder The guide parts marked with asterisks are equipped with the adjusting mechanism to stabilize the tape run ning or to record and reproduce the signals precisely Fig 8 2 Tape Pat...

Page 151: ...ayback fps rps modes the reel take up torque is controlled by the clutch mechanism thereby the tape fed by the capstan is taken up with a proper torque In the FF and REW modes the clutch enters a direct connecting status in which the clutch mechanism does not operate and the capstan drive torque is transmitted without reduction so a high speed taking up is enabled Fig 8 4 Reel Drive System Cylinde...

Page 152: ...te is horizontally moved 5 The cassette tape is vertically moved In this case the cassette lid is opened 6 The cassette tape is set on the reel disc and loading operation completes 7 The cassette tape is loaded 8 The status becomes full loading 9 When the cassette is out the reverse steps of the above procedure are carried out Fig 8 5 Cassette IN Start Sensor OFF Microcomputer Microcomputer Loadin...

Page 153: ...ension post loading tape guide capstan motor and the No 9 guide are positioned inside of the tape in the cassette case Fig 8 7 Cassette IN OUT Mode Cylinder T slant guide T guide roller ACE head Tape guide Pinch roller No 9 guide No 8 guide Capstan T Tape up reel disc Capstan belt Clutch gear Clutch mechanism Idle gear S slant guide S guide roller FE head Tension post Tape guide S Supply reel disc...

Page 154: ...Fig 8 8 Tape Loading Cylinder T guide roller ACE head Tape guide Pinch roller No 9 guide No 8 guide Capstan Guide post Guide post S guide roller FE head Tension post Tape guide 8 4 4 Playback Standby Mode In the full loading system the tape loading starts at the same time when the cassette mounting has completed the mechanism shifts to the playback position and enters the standby status with keepi...

Page 155: ... to the rotating direction of the capstan motor As a result the T reel rotates in the FF mode or the S reel rotates in the REW mode thus taking up the tape to the rotating reel Fig 8 9 FF REW Mode Cylinder T slant guide T guide roller Video tape Magneticside ACE head Tape guide Pinch roller No 9 guide No 8 guide Capstan T Tape up reel disc Capstan belt Clutch gear Clutch mechanism Idle gear S slan...

Page 156: ...tabilizing the tape tension The tape fed by the capstan is taken up around the T reel The T reel is driven with a constant torque generated by transmitting rotation of the capstan motor to the clutch mechanism Fig 8 10 Record Playback Mode Cylinder T slant guide T guide roller Video tape Magneticside ACE head Tape guide Pinch roller No 9 guide No 8 guide Capstan T Tape up reel disc Capstan belt Id...

Page 157: ...uter controls signal switchings for each circuit according to the mechanism status Remote control Remote Main microcomputer Loading motor drive broken safety tab Tape stsrt sensor Take up Supply Stsrt sensor Tape Mode sensor Detecting of mechanical mode position Detection of cassette in cassette out Loading motor control Voltage direction Capstan motor control Speed direction Abnormal reel retatio...

Page 158: ...e gear Pinch drive lever Tension drive lever S brake T brake Up Down lever FL arm lever Mode SW No 9 guide S T slider Pinch lever Tension lever Cassette holder FL cam gear Cam slider Fig 8 14 shows each mode and mechanism status in each mode concerned with the rotation of the FL cam gear or cam slider shift The mechanism operates as shown in Fig 8 13 according to the timing chart in Fig 8 14 Note ...

Page 159: ...ake soft Idle lever assembly S brake off Tension arm S slider assembly Pinch assembly Loading motor FL cam gear T loading lever assembly S loading lever assembly Loading drive gear Tension drive lever S brake T brake Pinch drive lever Joint gear 2 Cam slider Joint gear 1 FL cam gear Loading motor Bottom View Top View ...

Page 160: ...VCR Deck Operating Description 8 12 Fig 8 14 Mecha Timing Chart ...

Page 161: ... small load is given to S REEL DISK and no load is given to T REEL DISC 4 FF REW 2 This mode is performed when Œ The tape load is large during performing FF The tape load is small during performing REW and reducing speed No load is given to S REEL DISK and the small load is given to T REEL DISK Cf According to acceleration deceleration and the location of tape tension control which is caused by co...

Page 162: ... STOP 2 The large load is given to S REEL DISC Fig 8 18 T BRAKE 1 OFF BRAKE PLAY FF REW 1 T BRAKE is detached from T REEL DISC completely So T REEL DISC is free Fig 8 19 2 SOFT BRAKE UNLOADING Completion STOP 1 FF REW 2 The small load is given to T REEL DISC ...

Page 163: ...VCR Deck Operating Description 8 15 Fig 8 20 3 REVERSE SEARCH BRAKE RPS The medium load is given to T REEL DISC Fig 8 21 4 MAIN BRAKE on the loading STOP 2 The large load is given to T REEL ...

Page 164: ...am slider slides after operation of the cassette holder Then the mode switch also rotates synchronized with the cam slider and outputs a signal corresponding to each mode This signal is transmitted to the microcomputer and the microcomputer stops the cam slider at a specified angle thus establishing each mode The IC601 controls Capstan Motor Drive IC for each mode to make the loading motor rotate ...

Page 165: ...ly is enabled to be engaged with both S and T reel discs 3 When a cassette is inserted the lock lever of cassette holder is released from the stopper the cassette holder moves the FL arm lever rotates and the FL Drive Slider slides thereby closing the start sensor 4 IC601 controls Capstan Motor Drive IC to rotate the loading motor in forward direction and move the cassette holder At the same time ...

Page 166: ...ition II loading unloading modes the mechanism enters the loading status and operates as described below 1 S T sliders are moved through the loading drive gear and trun on the tension post 2 The No 9 guide is loaded 3 The pinch roller is loaded up to front of the capstan 4 The head cleaner is actuated during loading operation 5 The S soft brake is actuated 4 When the cam slider passes through the ...

Page 167: ...he stop mode the mechanism enters the eject mode 2 IC601 controls cylinder motor drive IC to make the cylinder motor rotates 3 IC601 makes the loading motor rotate in the reverse direction and shifts the cam slider 1 The mechanism components move in the reverse direction against the loading operation 4 When the cam slider reaches the position II IC601 makes the capstan motor rotate in the reverse ...

Page 168: ...e position V and each motor stops 2 The mechanism status is as follows 1 The S T guide rollers are in the loading status 2 The pinch roller is kept away from the capstan 3 The tension post is shifted to the reel disc side That is the band brake is released from the ON status and the back tension is also released 4 The S T soft brakes are being applied Fig 8 25 Stop Mode Position V ...

Page 169: ...iving force is directly transmitted to the reel disc 5 Brakes for the reel discs are as follows Œ VI position FF REW 1 mode S Brake soft brake T Brake off VII position FF REW 2 mode S Brake off T Brake soft brake 3 IC601 makes the capstan motor rotate in the forward direction and the idle gear transmits the rotation to the S T reel discs to take up the tape 5 FF REW to STOP mode 1 When the STOP bu...

Page 170: ...n IV The mechanism works as follows 1 The pinch roller moves toward the capstan side and press fits the capstan 2 The No 9 guide is loaded once and then returned immediately 3 The tension post touches the tape the band braking force is applied and the tension servo mechanism works 4 The clutch holder assembly enters clutched condition 5 S T brakes are released 4 IC601 makes the capstan rotate in t...

Page 171: ...low mode the capstan motor rotates continuously in the intermittent driving FPS mode 1 When the FF button is pressed in the playback mode the mechanism enters the FPS mode forward picture search The cam slider is in the position IV playback mode the cylinder motor is rotating and the capstan motor is rotating in the forward direction 2 IC 601 controls the audio circuit to actuate the audio mute op...

Page 172: ...250ms the capstan motor is rotated in the reverse direction for a constant time and the idle gear is swung toward the S reel disc side Then the loading motor rotates in reverse direction and shifts to the position III RPS mode When the cam slider reaches the position III RPS mode the loading motor stops The mechanism status is as follows 1 The No 9 guide is loaded 2 The tension post is separated f...

Page 173: ...e audio circuit and video circuit to set the record enable mode 4 Recording mute is released thus setting the recording status The CTL signal is output for recording REC PAUSE mode 1 When PAUSE button is pressed in the REC mode the mechanism enters the REC pause mode 2 IC601 controls the audio circuit and the video circuit and releases the record enable mode and performs the rewinding for synchron...

Page 174: ...VCR Deck Operating Description 8 26 MEMO ...

Page 175: ...of power with in normal value End repairs Check power and front connector Check the circuity around the clock Check the circuity around IC601 reset Check the soldering around the IC601 Change IC701 NO NO Key operatious such as STOP PLAY OPEN are normal Check the circuity around the swith check the condition of commmunication with Main Micom IC601 4 6 14 15 16 RRQ SRQ SCLK DATA IN DATA OUT NO YES Y...

Page 176: ...Y Button and Pattern CHECK IC601 XT601 SEE VIDEO MISSING IN EE MODE NO NO NO YES NO PB VIDEO SEE VIDEO MISSING IN PLAY MODE NO YES YES YES DOES NOT OPERATE OR OPERATES BUT STOP SOON YES VCR Section LOAD A TAPE AND PRESS PLAY BUTTON TURN VCR POWER ON MECHANISM DOESN T OPERATE IN PLAY MODE TAPE LOADING OPERATION LOAD IC601 59 HIGH IC601 60 LOW CYLINDER ROTATION SW 30Hz IC601 23 CYL FG PG IC601 65 CH...

Page 177: ...2 SEE CAPSTAN DOES NOT ROTATE NO DC STOP MODE YES PULSE YES A RECORD MODE DOESN T OPERATE PLAY OPERATION LOAD VCR WITH A BLANK TAPE AND PRESS RECORD BUTTON REC MODE SAFETY TAB D REC A H IC601 30 SEE AUDIO MISSING IN RECORD MODE CHANGE SW602 CHECK IC601 CHANGE TAPE SEE PLAY MODE DOESN T OPERATE EJECT NO NO YES NO REC VIDEO SEE VIDEO MISSING IN RECORD MODE NO YES YES YES YES VCR Section ...

Page 178: ...N604 5 9pin 3 2V CHECK IC601 CHECK POWER BLOCK YES YES YES CHECK MECHANISM NO IC601 68pin FG pulse CHECK CAPSTAN MOTOR YES VCR Section FWD SEARCH DOESN T 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 A CE HEAD CHANGE DECK CHANGE IC601 SEE PLAY DOESN T OPERATE NO NO NO YES NO CONTROL PULSE...

Page 179: ...OW 0V IC601 58 HIGH 5V IC610 59 HIGH 5V IC610 58 LOW 0V CHECK CASSETT LOADING MECHANISM YES YES NO CN604 8pin 12V YES NO YES VCR Section PLACE VCR IN STOP MODE CHANGE IC301 LINE 2 INPUT VIDEO MISSING IN EE MODE IC301 26 VIDEO OUT NO NO NO IC601 49 50 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...

Page 180: ...IC301 68pin Power 5Vp p and R320 NO YES IC301 73pin SP IC301 66pin SLP CHECK REC FM signal CHECK drum wafen and VIDEO head NO YES VCR Section VIDEO MISSING IN PLAY MODE VIDEO EE MODE OPERATION PLACE THE VCR PLAY MODE CHANGE IC301 CHECK IC601 CHECK VIDEO HEAD CHECK C305 CHECK IC601 23 CHECK VIDEO OUT LINE SEE PAGE 6 6 VIDEO MISSING IN EE MODE NO YES YES NO YES YES VIDEO FM IC301 14 VIDEO IC301 22 V...

Page 181: ...NE SEE PAGE 6 6 VIDEO MISSING IN RECORD MODE NO NO NO YES NO YES CHECK XT301 CHANGE XT301 NO NO CHANGE IC301 COLOR MISSING IN PLAY MODE FM ENV IC301 14 COLOR MONITOR IC301 46 COLOR KILLER IC301 6 2V SW 30HZ IC301 57 CHANGE IC301 CHECK IC301 48 51 XT301 CHECK IC601 SEE PAGE 6 7 VIDEO MISSING IN PLAY MODE NO NO NO NO YES YES YES YES NOTE XT301 Always 3 579545MHz VCR Section CHECK IC301 26 ...

Page 182: ...NGE IC601 CHECK C618 C619 CHECK C626 R639 YES NO YES NO VCR Section SELECT LINE MODE WITHOUT INPUT SIGNAL BLUE MISSING IN STOP MODE CHANGE IC601 CHECK IC601 37 38pin 14 318MHz out CHECK IC601 52 53pin AFC signal CHECK C626 R639 CHECK C618 C619 NO NO YES YES CHECK IC601 50pin SYNK signal CHECK C622 R638 NO YES VCR Section ...

Page 183: ...0 pin AUDIO SIGNAL NO YES IC801 48 60 pin AUDIO SIGNAL Change IC4M01 CHECK C4M47 YES IC4M01 51 pin 3 58Mhz CHECK CLK DATA IC4M01 37 38pin IC4M01 57pin AUDIO SIGNAL INPUT NO VCR Section MISSING AUDIO IC501 78 80 AUDIO SIGNAL IC501 26 AUDIO FM CHECK CYLINDER CHANGE IC501 CHECK C511 R506 CHANGE IC501 CHECK AUDIO MISSING IN EE MODE AUDIO MISSING IN REC MODE MONO HIFI MONO NO NO YES YES IC501 9 71 AUDI...

Page 184: ...IO SIGNAL IC301 9 AUDIO FM SIGNAL IC301 7 MIX SIGNAL AUDIO 70KHz Q305 OSCILLATION NO CHECK AUDIO MISSING IN PB MODE CHECK PB MODE CHECK A CE HEAD MONO NO CHECK AUDIO MISSING IN EE MODE PLACE THE VCR IN PB MODE CHANGE IC501 AUDIO MISSING IN PB 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 29 A H D SW CHANGE CYL...

Page 185: ...O YES YES YES VCR Section CAPSTAN DOES NOT ROTATE PLACE THE VCR IN PLAY MODE CN604 2 15V CN604 3 AL 5V CN604 9 3 2V CN604 5 2 6V CN601 33 OUTPUT PWM IC601 35 OUTPUT PWM CHECK CAPSTAN MOTOR CHECK R615 C606 R671 CHECK R607 CHANGE IC601 CHECK IC601 CHECK B IN THE POWER BLOCK CHECK 5V AT AL5V LINE IN THE POWER BLOCK NO NO NO NO YES NO YES NO YES YES YES YES VCR Section ...

Page 186: ...DOES NOT ROTATE CN604 6 12V CN604 3 5V CN604 12 2 5V CHECK CYLINDER MOTOR CN601 34 PWM OUT CHECK 5V LINE CHECK 12V AT PC12V LINE IN THE POWER BLOCK NO NO NO YES YES YES CHANGE IC601 NO CHECK R631 R617 R618 C609 C610 VCR Section ...

Page 187: ... connection right between MCON1 and CN02 VCR MAIN PCB No Check the connection Yes Yes Yes Tray repeating open close operation Check the connection between MCON1 and CN02 Are main and deck power OK Is the 40pin FFC cable between main deck inserted correctly Change the main board Check the power No No Reinsert FFC cable correctly Is the wavefrom of DIC3 pin26 normal main PCB No Change the deck Yes Y...

Page 188: ...s Yes Yes Yes No Analog Audio Output Proper data between AIC1 and DIC1 main PCB Replace main board Yes Check the digital audio setting Proper vcc of DOIC1 jack PCB Check optical and coaxial output terminal and passive components aroud them Refer to user manual No Checking Check DOL3 or Vcc Line Proper signal input on pin13 of DOIC1 No No Proper signal output on pin6 of DOIC1 Check the signal on pi...

Page 189: ...NO P480 Mark on FLT 12pin in CN3 of jack PCB or CN2 of main PCB has normal level Check the RCA cable After DVDR is stop state push the progressive scan Key on the Front panel No No Check main PCB Analog signals are inputed normally VIC1 No No No Check the connection between 12pin in CN2 OF main PCB and VIC1 Power is normal at VIC1 1 24 34 jack PCB Pin13 in VIC1 is in high state Check the connectio...

Page 190: ...es No Video signals of about 1V appears at output jack Check the connection between VIC1 and output jack Yes S Video output error Is there NO P480 Mark on FLT After DVDR is stop state push the progressive scan Key on the Front panel 2 4 and 6pin in CN3 of jack PCB or CN2 of main PCB has normal level Analog signals are inputted normally VIC1 Check the RCA cable Check main PCB No No Check the connec...

Page 191: ...801 has nomal level Check feed back Check the connection between pin4 in IC801 and L1 pin jack No No Check pin 62 55 in IC801 of input power No No Pin80 in TIC1 of main PCB has nomal level Pin40 and pin 54 43 in TIC1 of main PCB has clock and digital video signal nomal level Check the connection between pin80 in TIC1 of main PCB and pin 13 in IC201 Check TIC1 peripheral circuit Yes Yes Yes Yes Lin...

Page 192: ...onnection between pin80 in TIC1 of main PCB and pin13 in IC201 Check TIC1 peripheral circuit Yes Yes Yes Yes Line2 CVBS Video Input Error Pin 15 17 in CN3 has nomal level jack PCB Change main PCB Check the connection between pin 15 and 17 in CN3 and L2 S videojack No No No Pin9 and 18 in TIC1 of main PCB has nomal level Pin 40 and pin54 43 in TIC1 of main PCB has clock and digital video signal nom...

Page 193: ...10 1 10 Exploded View and Parts List 10 1 Cabinet Assembly 10 2 10 2 VCR Mechanical Parts Top Side 10 4 10 3 VCR Mechanical Parts Bottom Side 10 6 ...

Page 194: ...001 W001 W001 P001 VCR MAIN PCB P025 P007 With in the VCR MAIN PCB P002 DVD MAIN PCB P005 FRONT PCB P003 JACK PCB ASSY FRAME S N A C001 C003 C012 S N A Service Not Available S602A LD61A P030 W004 W004 BRACKET FRAME S N A W252 W004 VCR DECK S N A H001 DVD DECK C011 C002 C022 ...

Page 195: ...SHIBA DV P002 AK92 00429B BY630421 ASSY PCB MAIN DVD D VR3TU TSB TOSHIBA DV P003 AK94 00015A BY630385 ASSY SORT JACK DVD VR300 VCR DVD RECODER P005 AK94 00020A BY630384 ASSY SORT FUNCTION DVD VR300 004 SECREC4 P007 AK97 01041A BY630386 ASSY SORT KEY D VR3 S TU DVD RECORDER VC P025 AC39 10200N BY634046 CBF POWER CORD AT US EP2 Y HOUSING 2P 1 P030 3103 001152 BY731622 FAN DC DC 12 0V 110mA 1700rpm 0...

Page 196: ...Parts List 10 4 10 2 VCR Mechanical Parts Top Side T001 T015 T014 T003 W201 T004 T005 T033 W015 T011 T012 T022 T021 T019 T023 T024 T028 T026 T020 T027 T002 T029 T007 T006 T025 T032 T030 T013 T008 T009 T031 W016 T010 T016 ...

Page 197: ... BY630397 ASSY POST 8 GUIDE SUS303 POM M90 44 EQ T019 AC66 10267A BY730102 REEL DISK S X 9 POM T020 AC66 10268A BY730103 REEL DISK T X 9 POM T021 AC66 30524A BY730112 LEVER IDLER POM BLK T022 AC66 00039A BY730760 GEAR IDLE TS 10 PET K3372 0 5 NTR 28 T023 AC66 00035A BY730759 LEVER TENSION ASS Y TS 10 SECC E20 20 SU T024 AC61 00107A BY730725 SPRING ETC TENSION LEVER TS 10 SUS304 WP T025 AC69 00104A...

Page 198: ...Exploded View and Parts List 10 6 10 3 VCR Mechanical Parts Bottom Side T046 W018 T044 T041 T042 T043 T034 T035 T037 T038 T049 T047 T050 T048 T040 W019 T036 T039 T045 ...

Page 199: ...2195A BY630393 ASSY LEVER LOADING S SECC POM SUS X 11 F T043 AC97 02196A BY630394 ASSY LEVER LOADING T SECC POM SUS X 11 F T044 AC81 00002A BY731637 MOTOR CAPSTAN THRUST END PLAY 0 2 MR FG T045 3809 001270 BY634670 CABLE FLAT 30V 80C 140MM 10P 1 25MM UL28 T046 AC66 60051A BY730122 BELT PULLEY 5CM 70 2 2 71 3 X 9 T047 AC61 21012A BY730084 HOLDER CLUTCH ASSY X 9 ABS BLK T048 AC66 20581A BY730111 GEA...

Page 200: ...Exploded View and Parts List 10 8 MEMO ...

Page 201: ... 22OHM 5 1 8W AA TP 1 8X3 2MM R1S13 2005 001198 BY230337 R WIRE WOUND NON 0 18ohm 1 1W AA TP 4 3 R1S14 2001 000290 70795006 R CARBON 10KOHM 5 1 8W AA TP 1 8X3 2MM R1S15 2001 000096 BY230036 R CARBON S 1MOHM 5 1 2W AA TP 2 4X6 4M R1S31 2001 000780 70795039 R CARBON 470OHM 5 1 8W AA TP 1 8X3 2MM R1S32 2001 000221 BY230019 R CARBON 1 2KOHM 5 1 8W AA TP 1 8X3 2M R1S33 2001 000429 70795005 R CARBON 1KO...

Page 202: ...000515 70795019 R CARBON 220OHM 5 1 8W AA TP 1 8X3 2MM R605 2001 000111 BY230144 R CARBON 150OHM 5 1 4W AA TP 2 4X6 4MM R606 2007 000094 BY230288 R CHIP 22Kohm 5 1 10W TP 1608 R607 2001 000633 70795029 R CARBON 30KOHM 5 1 8W AA TP 1 8X3 2MM R609 2007 000078 BY230279 R CHIP 1Kohm 5 1 10W TP 1608 R611 2007 000081 BY230281 R CHIP 2 7Kohm 5 1 10W TP 1608 R613 2007 000090 BY230285 R CHIP 10Kohm 5 1 10W...

Page 203: ...FLAT 30V 20to 80C 140mm 6P 1 25mm IC301 1204 001952 BY631201 IC VIDEO PROCESS LA71207 QFP 80P 14X14MM L301 AC27 92001M 70795644 COIL INDUCTOR RH3 5X6 5RS BEAD RADIAL L302 3301 000297 BY330019 BEAD AXIAL 25ohm 3 6x1 2x5 7mm TP L303 3301 000297 BY330019 BEAD AXIAL 25ohm 3 6x1 2x5 7mm TP L304 3301 000297 BY330019 BEAD AXIAL 25ohm 3 6x1 2x5 7mm TP L305 AC27 92001M 70795644 COIL INDUCTOR RH3 5X6 5RS BE...

Page 204: ...7 00017A BY634844 LED DISPLAY LTG 0377M DVD VR300 70 10 7 IC701 1003 001443 BY631188 IC LED DRIVER PT6959 SOIC 28P 300MIL L701 2701 000002 BY330009 INDUCTOR AXIAL 100UH 10 4298 Q701 0501 000341 BY530073 TR SMALL SIGNAL KSC1623 L NPN 200mW SOT Q702 0501 000341 BY530073 TR SMALL SIGNAL KSC1623 L NPN 200mW SOT R701 2001 000429 70795005 R CARBON 1KOHM 5 1 8W AA TP 1 8X3 2MM R702 2001 000008 70795014 R...

Page 205: ...7 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 C168 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 C169 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 C171 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 C173 2402 000176 BY130504 C AL SMD 10uF 20 16V GP TP 4 3x4 3x5 4 C174 2402 001096 BY130508 C AL SMD 220UF 20 16V GP TP 6 6X6 6X7 C177 2203 005148 BY130480 ...

Page 206: ...m 5 1 10W TP 1608 DR65 2007 000090 BY230285 R CHIP 10Kohm 5 1 10W TP 1608 DR66 2007 000074 BY230276 R CHIP 100ohm 5 1 10W TP 1608 DR67 2007 000090 BY230285 R CHIP 10Kohm 5 1 10W TP 1608 DR68 2007 000090 BY230285 R CHIP 10Kohm 5 1 10W TP 1608 DR69 2007 000084 BY230282 R CHIP 4 7Kohm 5 1 10W TP 1608 DR7 2007 000071 BY230341 R CHIP 22ohm 5 1 10W TP 1608 DR71 2007 000070 BY230274 R CHIP 0ohm 5 1 10W T...

Page 207: ... 70693337 R CHIP 0ohm 5 1 4W TP 3216 RL5 2007 000033 70693337 R CHIP 0ohm 5 1 4W TP 3216 RL6 2007 000033 70693337 R CHIP 0ohm 5 1 4W TP 3216 RL7 2007 000033 70693337 R CHIP 0ohm 5 1 4W TP 3216 RP1 2011 000686 BY230368 R NET 56OHM 5 1 16W L CHIP 8P TP RP10 2011 000686 BY230368 R NET 56OHM 5 1 16W L CHIP 8P TP RP12 2011 000686 BY230368 R NET 56OHM 5 1 16W L CHIP 8P TP RP14 2011 000686 BY230368 R NET...

Page 208: ... 000128 BY530074 TR DIGITAL NPN 200MW 22K 22K SOT 23 TP AQ2 0504 000156 BY530075 TR DIGITAL KSR2103 PNP 200MW 22K 22K SOT AQ3 0501 000341 BY530073 TR SMALL SIGNAL KSC1623 L NPN 200mW SOT AQ4 0504 000128 BY530074 TR DIGITAL NPN 200MW 22K 22K SOT 23 TP AQ5 0504 000156 BY530075 TR DIGITAL KSR2103 PNP 200MW 22K 22K SOT AQ6 0501 000341 BY530073 TR SMALL SIGNAL KSC1623 L NPN 200mW SOT AQ7 0504 000128 BY...

Page 209: ...070 BY230274 R CHIP 0ohm 5 1 10W TP 1608 CNR15 2007 000070 BY230274 R CHIP 0ohm 5 1 10W TP 1608 CNR16 2007 000070 BY230274 R CHIP 0ohm 5 1 10W TP 1608 CNR17 2007 000070 BY230274 R CHIP 0ohm 5 1 10W TP 1608 CNR18 2007 000070 BY230274 R CHIP 0ohm 5 1 10W TP 1608 CNR19 2007 000070 BY230274 R CHIP 0ohm 5 1 10W TP 1608 CNR20 2007 000084 BY230282 R CHIP 4 7Kohm 5 1 10W TP 1608 CNR21 2007 000084 BY230282...

Page 210: ... 10W TP 1608 R855 2007 000134 BY230298 R CHIP 33Kohm 5 1 10W TP 1608 R856 2007 001167 BY230304 R CHIP 75ohm 5 1 10W TP 1608 RS01 2007 001167 BY230304 R CHIP 75ohm 5 1 10W TP 1608 RS02 2007 000125 BY230296 R CHIP 3 9Kohm 5 1 10W TP 1608 RS03 2007 000094 BY230288 R CHIP 22Kohm 5 1 10W TP 1608 RS04 2007 000078 BY230279 R CHIP 1Kohm 5 1 10W TP 1608 RS05 2007 000078 BY230279 R CHIP 1Kohm 5 1 10W TP 160...

Page 211: ... CC3 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 CC30 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 CC31 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 CC32 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 CC33 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 CC34 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 CC35 2203 005148 BY130480 C ...

Page 212: ...16V X7R TP 1608 DC42 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 DC44 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 DC45 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 DC47 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 DC49 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 DC5 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 DC51 2203 005...

Page 213: ...C CER CHIP 10nF 10 50V X7R TP 1608 RC31 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 RC32 2203 000440 BY130462 C CER CHIP 1nF 10 50V X7R TP 1608 RC33 2203 000440 BY130462 C CER CHIP 1nF 10 50V X7R TP 1608 RC34 2203 000626 BY130444 C CER CHIP 0 022nF 5 50V C0G TP 1608 RC35 2203 000257 BY130440 C CER CHIP 10nF 10 50V X7R TP 1608 RC36 2203 000257 BY130440 C CER CHIP 10nF 10 50V X7R TP 160...

Page 214: ...011 000475 BY230366 R NET 33OHM 5 1 16W L CHIP 8P TP 32 ZAR3 2011 000475 BY230366 R NET 33OHM 5 1 16W L CHIP 8P TP 32 ZAR4 2011 000475 BY230366 R NET 33OHM 5 1 16W L CHIP 8P TP 32 ZAR5 2011 001085 BY230369 R NET 82OHM 5 1 16W L CHIP 8P TP ZB1 2007 000070 BY230274 R CHIP 0ohm 5 1 10W TP 1608 ZC1 2203 005148 BY130480 C CER CHIP 100nF 10 16V X7R TP 1608 ZC10 2203 005148 BY130480 C CER CHIP 100nF 10 1...

Page 215: ...608 ZR37 2007 000090 BY230285 R CHIP 10Kohm 5 1 10W TP 1608 ZR38 2007 000090 BY230285 R CHIP 10Kohm 5 1 10W TP 1608 ZR39 2007 000084 BY230282 R CHIP 4 7Kohm 5 1 10W TP 1608 ZR4 2007 000113 BY230328 R CHIP 33ohm 5 1 10W TP 1608 ZR40 2007 000090 BY230285 R CHIP 10Kohm 5 1 10W TP 1608 ZR41 2007 000084 BY230282 R CHIP 4 7Kohm 5 1 10W TP 1608 ZR5 2007 000113 BY230328 R CHIP 33ohm 5 1 10W TP 1608 ZR58 2...

Page 216: ...11 16 Electrical Parts List MEMO ...

Page 217: ...1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...

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