VHS MECHANICAL ADJUSTMENT MANUAL VII - Wiki Karat
Contents
1. REEL DISK TAKE UP REEL DISK Fig 2 1 Location of Tape Transport Adjustment FE HEAD CYLINDER ASS Y PINCH ROLLER GUIDE ROLLER S GUIDE ROLLER T POST TENSION 8 SHD POST 9 GUIDE POST m gt IL gt ET 3 GUIDE POST ACE HEAD MAIN BASE CAPSTAN SHAFT Fig 2 2 Tape Travel Diagram a 2 2 Tape Transport System Adjustment When parts are replaced perform the required adjustments by referring to procedures for the tape transport system If there are any changes to the tape path first run a T 120 tape and make sure excessive tape wrinkle does not occur at the tape guides 1 If tape wrinkle is observed at the guide roller S T turn the guide roller S T until wrinkle disappears 2 If the tape wrinkle is still observed at the tape guide perform the tilt adjustment of the ACE head See page 5 3 of the Service Manual for Test Point Locations 2 2 1 ACE Head Assembly Adjustment 2 2 1 a ACE HEAD HEIGHT ADJ USTM ENT 1 Run the alignment tape KRV 52NE NTSC 52PL PAL 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 2 3 and 2 4 SCREW A SCREW C2. TLIT ADJ UST HEIGHT AD UST X POSITION 2 ADJ USTING SLIT SCREW D SCREW B B X POSITION LOCKING AZIM UTH ADJ UST Fig 2 3 Location of ACE Head Adjustment Screw AUDIO HEAD VIDEO HEAD j 4 U 0 0 25 mm CONTROL HEAD Fig 2 4 ACE Head Height Adjustment 2 2 1 b ACE HEAD TILT ADJ USTM ENT 1 Playback a blank tape and observe the position of the tape at the lower flange of tape guide 2 Confirm that there is no curl or wrinkle at the lower flange of tape guide as shown in Fig 2 5 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 y gt WRINKLE ees BAD GOOD Fig 2 5 Tape Guide Check 2 2 1 c AUDIO AZIM UTH ADJ USTM ENT 1 Load alignment tape KRV 52NE NTSC 52PL PAL and playback the NTSC 5KHz PAL 4KHz signal 2 Connect channel 1 scope probe to audio output test point 3 Adjust screw B to achieve maximum audio level See Fig 2 3 2 2 1 d ACE HEAD POSITION X POINT AD USTM ENT 1 See 2 Alignment and Adjustment for ACE Head position X Point adjustment 2 2 2 Linearity Adjustment Guide roller S T adjustment 1 Playback the alignment tape KRV 51N2 NTSC 51P PAL SP mode Mono Scope 2 Observe the video envelope signal on an oscillo scope triggered by the vid
3. as shown in detail A 2 Don t push Holder Clutch 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 WASHER SLIT PAL Z HOLDER CLUTCH ASS Y DETAIL A 1 lt BAD gt SPRING lt G00D gt DETAIL B SPRING lt BAD gt lt GOOD gt Fig 1 20 Holder Clutch Ass y Removal 1 2 16 Lever Up Down Ass y Gear Center Ass y Removal 1 Remove the 2 hooks in the direction of arrow as shown Fig 1 21 and lift the Lever Up Down Ass y 2 Lift the Gear Center Ass y Assembly 1 Insert the Lever Up Down Ass y in the rectan gular holes on Main Base as shown in Fig 1 22 2 Lift the Lever Up Down Ass y about 35 degree Refer to Fig 1 22 3 Insert Ring of the Gear Center Ass y in the Guide of the Lever Up Down Ass y 4 Insert the Gear Center Ass y in the post on Main Base 5 Push down the Lever Up Down Ass y 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 the Gear Center Ass y is in the Guide of the Lever Up Down Ass y after finishing assembly of Lever Up Fig 1 21 Lever Up Down Ass y Removal GEAR
4. CENTER ASS Y GUIDE LEVER UP DOWN ASS Y RING GEAR POST TT MAIN BASE Fig 1 22 Lever Up Down Ass y Removal 1 2 17 Guide Cassette Door Removal 1 2 18 Lever Unit Pinch Ass y Plate J oint Spring Pinch Drive Removal 1 Lift the Hook A 2 Rotate the Guide Cassette Door in the direction 1 Lift the Unit Pinch Ass y of arrow 2 Remove the Plate Joint from Lever Pinch Drive 3 Remove the Spring Pinch Drive Note After reinstalling the Guide Cassette Door sure the Hook A Note 1 Take extreme care not to touch the grease on the Roller Pinch 2 When reinstalling be sure to apply grease on the GUIDE CASSETTE DOOR post pinch roller D LEVER UNIT PINCH ASS Y HOOK ae Fig 1 23 Guide Cassette Door Removal Fig 1 24 Lever Unit Pinch Ass y Plate J oint Spring Pinch Drive Removal ee 1 2 19 Lever 9 Guide Ass y Removal 1 2 20 FE Head Removal 1 Remove the Spring 9 Guide 1 Remove the screw 2 Lift the Spring 9 Guide Ass y in the direction 2 Lift the FE Head 8 of arrow A Note 1 Take extreme care not to get grease on the tape FE HEAD Guide Post 2 After reinstalling check the bottom side of the Post 9 Guide to the top side of Main Base SPRING GUIDE P LEVER 9 GUIDE ASS Y Fig 1 26 FE Head Removal Fig 1 25 Lever 9 Guide Ass y Removal 15 1 2 21 ACE Head Removal 1 2 22 Sl
5. VHS MECHANICAL ADJUSTMENT MANUAL VII TS 10 MECHANISM Please use this manual with the service manual VHS MECHANISM DECK SON Y TABLE OF CONTENTS 1 Disassembly and Reassembly 1 1 Deck Parts Locations eeeeeeeeeeeeee eee eee 3 1 1 1 Top View o 1 1 2 Bottom View 1 2 Main Deck F 1 2 1 Lever FL Door Removal eee eee 1 2 2 Holder FL Cassette Ass y Removal 1 2 4 Lever FL Arm Ass y Removal 1 2 3 Slider FL Drive Gear FL Cam Removal 1 2 5 Gear Worm Wheel Removal p 1 2 6 Motor Loading Ass y Removal sseeseseeeeererrreeerrerrereeeses 1 2 7 Bracket Gear Gear Joint 2 1 Removal 1 2 8 Gear Loading Drive Slider Cam Lever Load S FTAsS y REMOVAL 1403 40 cscsieeceseceesessedeoieneptcosebtecerscnserecedene ont 9 1 2 9 Gear Loading Drive Slider Cam Lever Load S TASS y Assembly ta tact niente dr 10 1 2 10 Lever Pinch Drive Lever Tension Drive Removal 10 1 2 11 Lever Tension Ass y Band Brake Ass y Removal 11 1 2 12 Lever Brake S T Ass y Removal ccee eee eeeeeeeees 11 1 2 13 Gear Idle Ass y Removal 1 2 14 Disk S T Reel Removal 1 2 15 Holder Clutch Ass y Removal eee 13 1 2 16 Lever Up Down Ass y Gear Center Ass y Removal 13 1 2 18 Lever Unit Pinch Ass y Plate Joint Spring Pinch Drive Removal cc ceeceeeseeeesseeeeeseeeeees 1 2 17 Guide Ca
6. ding made on the unit using with T 120 E 120 The video envelope should meet the specification as shown in Fig 2 10 In SP mode A should equal B If the head gap is wide upper cylinder should be checked L Fig 2 10 Envelope Output and Output Level 2 2 5 Tape Wrinkle Check 1 Run the T 160 E 180 tape in the playback FPS RPS and Pause modes and observe tape wrinkle at each guide 2 If excessive tape wrinkle is observed perform the following adjustments in Playback mode Tape wrinkle at the guide roller S T section Linearity adjustment Tape wrinkle at tape guide flange ACE head assembly coarse adjustment lt Table 2 1 gt M ODE TORQUE g cm GAUGE PB 42 11 Cassette Torquemeter RPS 145 30 Cassette Torquemeter 24 MEMO 25 VHS MECHANICAL ADJUSTMENT MANUAL VII Sony Corporation ideoi 9 921 790 11 Network Entertainment Group 2001 1 26 Published by Quality Assurance Dept
7. eo switching pulse 3 Make sure the video envelope waveform at its minimum meets the specification shown in Fig 2 6 If it does not adjust as follows Note 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 2 7 does not meet the speci fication adjust the guide roller S up or down 5 If the section B in Fig 2 7 does not meet the speci fication adjust the guide roller T up or down 6 Play back the alignment tape SP mode Mono Scope Y a d abcd cb d a 263 Fig 2 6 Envelope Waveform Adjustment H D SWITCHING PULSE ENVELOPE Fig 2 7 Adjustment Points 7 Connect an oscilloscope CH 1 to the Envelope and CH 2 to the H D SW Pulse for triggering 8 Turn the guide roller heads with a flat head PA driver to obtain a flat video RF envelope as shown in Fig 2 8 a IDEAL ENVELOPE CHG HAT Dep AE S HEIGHT TOO HIGH S HEIGHT TOO LOW S9 T HEIGHT TOO HIGH T HEIGHT TOO LOW So GUIDE ROLLER S E GUIDE ROLLER T jim Fig 2 8 Guide Roller S T Height Adjustment 2 2 3 Check Tran
8. grasp the Lever FL Cassette R 8 Continuously until the Holder FL Cassette Ass y 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 Fig 1 5 Holder FL Cassette Ass y Removal 1 2 3 Slider FL Drive Gear FL Cam Removal 1 Pull the Slider FL Drive to the front direction 2 Remove the Slider FL Drive in the direction of arrow Refer to Fig 1 6 3 Remove the Gear FL cam 8 Note When reinstalling be sure to reassemble Slider FL drive after you insert the Boss of Lever FL ARM R in Groove of Slider Fl drive Assembly Align the Gear FL Cam with the Gear worm wheel Post as shown drawing Refer to Timing point P GEAR FL CAM D SLIDER FL DRIVE Fig 1 6 Slider FL Drive Removal GEAR FL CAM GEAR WORM WHEEL L Fig 1 7 Gear FL Cam Gear Worm 1 2 4 Lever FL Arm Ass y Removal 1 Push the hole A in the direction of arrow B use the pin about Dia 2 5 2 Pull out the Lever FL Arm Ass y from the Boss of Main Base 3 Remove the Lever FL Arm Ass y in the direc tion of arrow C HOLE A PIN Fig 1 8 Lever FL Arm Ass y Removal 1 2 5 Gear Worm Wheel Removal 1 2 6 Motor Loading Ass y Removal 1 Remove the screw 2 Remove the Motor Loading Ass y 1 Rem
9. ider S T Ass y Removal 1 Pull out the FPC from connector of ACE Head 1 Move the Slider S T Ass y to slot and then Ass y 8 lift it to remove Refer to arrow 2 Remove the screw 3 Lift the ACE Head Ass y 8 SLIDER S ASSY SCREW O B SLIDER T ASS Y Fig 1 28 Slider S T Ass y Removal Fig 1 27 ACE Head Removal 16 1 2 23 Plate Ground Deck Cylinder Ass y Removal 1 Remove the 3 Screws 2 Lift the Plate Ground Deck 8 3 Lift the Cylinder Ass y Assembly 1 Match the 3 holes in the bottom of Cylinder ass y to the 3 holes of Main Base as attending not to drop or knock the Cylinder ass y 2 Tighten the 1 Screw 3 Match the Plate Ground Deck to the Hole of Base Main 4 Tighten the other 2 Screws Note 1 Take care not to touch the Cylinder Ass y and the tape guide post at reinstalling 2 When reinstalling Don t push down too much on Screw Driver 3 SCREWS N lt 4 AS P PLATE GROUND DECK CYLINDER ASS Y Fig 1 29 Plate Ground Deck Cylinder Ass y Removal 1 2 24 Belt Pulley Removal 1 Remove the Belt Pulley Note Take extreme care not to get grease on Belt Pulley Oat assembling or reassembling BELT PULLEY Fig 1 30 Belt Pulley Removal 1 2 25 Level Head Cleaner Ass y Removal 1 Release the Hook 2 Lift the Lever Head Cleane
10. ion 2 FE HEAD DISK S REEL CYLINDER ASS Y LEVER S BRAKE ASS Y ACE HEAD ASS Y GEAR IDLE LEVER UNIT PINCH ASS Y LEVER IDLE LEVER 9 GUIDE ASS Y LEVER T BRAKE ASS Y LEVER TENSION ASS Y DISK T REEL BAND BRAKE ASS Y 1 1 2 Bottom View 00 o Sa q AS S ea G D LA s S gt L S Su Doe A lt ZN O S S o 6 0 Fig 1 3 Bottom Parts Location GEAR JOINT 1 GEAR J OINT 2 BRACKET GEAR MOTOR CAPSTAN ASS Y LEVER T LOAD ASS Y GEAR LOADING DRIVE LEVER S LOAD ASS Y HOLDER CLUTCH ASS Y BELT PULLEY SLIDER CAM 1 2 Main Deck 1 2 1 Lever FL Door Removal 1 Push the Holder FL Cassette Ass y about 20mm in the direction of arrow A 2 Rotate the Lever FL Door in the direction of arrow B 3 Release the Hook and Remove the Lever FL Door in the direction of arrow C HOLDER FL CASSETTE ASS Y HOOK Fig 1 4 Lever FL Door Removal 1 2 2 Holder FL Cassette Ass y Removal 1 Pull the Holder FL Cassette Ass y to the eject position 2 Pull the Holder FL Cassette Ass y as grasping the Holder FL Cassette Ass y and Lever FL Cassette R in the same time to release hooking from Main Base until the Boss A of Holder FL Cassette Ass y is taken out from the Rail B 3 Lift the Holder FL Cassette Ass y in this time you have to
11. m Lever Load S T Ass y Assembly 1 When reinstalling be sure to align dot of Lever Load T Ass y with dot of Lever Load S Ass y as shown in drawing Refer to Timing Point 1 2 Insert the Pin A B C D into the Slider Cam hole 3 Be sure to align dot of Lever Load T and dot of Gear Loading Drive Refer to Timing Point 2 4 Aline dot of Gear Loading drive with mark of Slider Cam as shown in drawing Refer to Timing Point 3 TIMING POINT 1 1 2 10 Lever Pinch Drive Lever Tension Drive Removal 1 Remove the Lever Pinch Drive Lever Tension Drive LEVER PINCH DRIVE Fig 1 15 Lever Pinch Drive Lever Tension Drive Removal LEVER LOAD S LEVER LOAD T at CG A Sg TIMING POINT 2 ra CR C TIM ING POINT 3 ER rawr PIN A PIN C PIND PINB SLIDER CAM Fig 1 14 Gear Loading Drive Slider Cam Lever Load S T Ass y Assembly Wa 10 1 2 11 Lever Tension Ass y Band Brake Ass y Removal 1 Remove the Lever Brake S Ass y Refer to Fig 1 17 2 Remove the Spring Tension Lever 3 Rotate stopper of Main Base in the direction of arrow A 4 Lift the Lever Tension Ass y amp Band brake Ass y Note 1 When replacing the Lever Tension Ass y 8 be sure 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 Afte
12. ne away com E 9 GUIDE POST A A A A A A A A A A pletely p 3 GUIDE POST A A A A A LA A LA LA A A GUDEROLERS T A A A 0 0 0 0 0 o o WerecommendiouseallINT g T CYLINDER ASS Y A 0 0 0 0 0 0 0 0 0 a i FE HEAD A A A 0 0 0 0 0 0 O One or two drops of oil should be S ACE HEAD A 10 10 10101010 0 o o applied after Y PINCH ROLLER Al olol lololo o o o o Searing with alcoto POST REEL S T Periodic time of applying oil Apply E SLEEVE TENSION after cleaning M POST CENTER s 3 x The excessive applying oil may be the cause of LEVER IDLE BOSS 2Point malfunction D CAPSTAN MOTOR PULLEY A ALA LA LA JO O 0 olo Re BELT PULLEY D00 ee 101202100 s HOLDERCLUTCHASSY A 0 0 o 0 olo0olololo GEAR CENTER ASS Y GNI SOF Os PM 208 Wie Oe 41102 UE N G GEAR IDLE 2Point 0 0 0 0 0 0 0 0 0 G LOADING MOTOR Orie Noes oe co Oe ol 6150 R BAND BRAKE ASS Y 0 0 0 0 0 0 0 0 0 k BRAKE T ASS Y 0000 0 olo o o A Cleaning O Check and replacement in necessary Add Oil 1 4 Tools and fixtures reguired for service Name Torque Measurement Cassette VHT 103S Part No J 6090 072 A Caved J ig No Remarks For FWD amp back tension torque measurement Torque Measurement Cassette VHT 404S 6082 012 A For CUE and REVIEW torque measurement Alignment Tape KRV 52NE NTSC KRV 51N2 NTSC 8 192 605 41 8 192 605 32 Tape path Audi
13. o azimuth X value adjustments Electrical adjustments Operation check KRV 52PL PAL 8 192 605 46 Tape path Audio azimuth X value adjustments KRV 51P PAL Cleaning Fluid 8 192 605 36 Y 2031 001 0 Electrical adjustments Operation check Chamois Leather 2 034 697 00 Dental Mirror with Handle J 6080 029 A Dental Mirror Mirror J 6080 030 1 SL 5052 Tape path and tape traveling adjustments or checks Grease Molykote EM 30LG J 6090 014 A Net 20 g Diamond Oil NT 68 7 661 018 18 ig 1 35 gt 20 2 Alignment and Adjustment 2 1 Tape Transport System and Adjustment Locations The tape transport system has been adjusted precisely in the factory Alignment is not necessary except for the following 1 Noise observed on the screen 2 Tape damage 3 Parts replacement in the tape transport system Lower flange height of tape guide is used as the reference for the transport adjustment To maintain the height of the tape guide and prevent damage do not apply excessive force onto the main base CYLINDER ASS Y GUIDE ROLLER S GUIDE ROLLER T D FULL ERASE HEAD lh i 43 GUIDE POST TENSION POST PINCH ROLLER amp 0 HEIGHT SCREW Ac GHT SC TILT SCREW X POSITION O 9 GUIDE POST ADJ UST SILT AZIMUTH SCREW CAPSTAN 8 GUIDE POST 4 x S 7 ss S M DB u MON S48 N SL SUPPLY
14. ove the Gear Worm wheel MOTOR LOADING ASS Y SCREW GEAR WORM WHEEL Fig 1 10 Motor Loading Ass y Removal Fig 1 9 Gear Worm Wheel Removal 1 2 7 Bracket Gear Gear J oint 2 1 Removal Remove the SCREW Remove the Bracket Gear Remove the Gear Joint 2 Remove the Gear Joint 1 1 2 3 4 Veo YS YH Assembly 1 Be sure to align dot mark of Gear Joint 1 with dot mark of Gear Joint 2 as shown Fig 1 12 Refer to Timing point1 2 Confirm the Timing Point 2 of the Gear Joint 2 and Slider Cam GEAR JOINT 1 GEAR J OINT 2 Fig 1 11 Bracket Gear Gear J oint 1 2 Removal D GEAR J OINT1 GEAR J OINT2 B SLIDER CAM TIMING POINT 1 TIMING POINT 2 Fig 1 12 Gear J oint 1 2 Assembly 1 2 8 Gear Loading Drive Slider Cam Lever Load S T Ass y Removal 1 Remove the Belt Pulley Refer to Fig 1 30 2 Remove the Gear Loading Drive after releasing Hook A in the direction arrow as shown in detail drawing 3 Remove the Slider Cam 8 4 Remove the Lever Load S 8 Link Load S 8 amp Lever Load T G Link Load T 6 HOOK A S 0 GEAR LOADING DRIVE SLIDE CAM B LEVER LOAD T D LINK LOAD T a LEVER LOAD S F LINK LOAD S Fig 1 13 Gear Loading Drive Slider Cam Lever T S Load Ass y Removal 1 2 9 Gear Loading Drive Slider Ca
15. r Ass y LEVER HEAD CLEANER ASS Y HOOK SLEEVE HEAD CLEANER Fig 1 31 Level Head Cleaner Ass y Removal 1 2 26 Damper Capstan Motor Capstan Ass y Removal 1 Remove the Damper Capstan in the direction of arrow 2 Remove the 3 Screws 8 3 Remove the Motor Capstan Ass y Assembly 1 Match the 3 holes of Motor Capstan Ass y to the 3 holes of Main Base Be careful not to drop or knock the Motor Capstan Ass y 2 Tighten the 3 Screws in the direction of arrow as shown detail drawing 3 Assemble the Damper Capstan Note After 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 3 SCREWS sH ilag MOTOR CAPSTAN ASS Y Fig 1 32 Damper Capstan M otor Capstan Ass y Removal 1 2 27 How to Eject the Cassette Tape If the unit does not operate on condition that is inserted into housing ass y 1 Turn the Gear worm clockwise with screw driver Refer to arrow Other method Remove the Screw of Motor Load Ass y Separate the Motor Load Ass y GEAR WORM lt KD ELOV Fig 1 33 2 When Slider S T are approched in the position of unloading rotate holder Clutch counterclockwise after inserting screw driver in the hole of f
16. r Lever Tension Ass y seated Rotate stopper of Main Base to the Mark B SPRING TENTIO Fig 1 16 Lever Tension Ass y Band Brake Ass y Removal 1 2 12 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 1 17 2 Lift the Lever S T Brake Ass y 8 with spring brake Assembly 1 Assembly the Lever S Brake Ass y on the Main Base 2 Assembly the Lever T Brake Ass y with spring brake Note Take extreme care not to be folded and transformed Spring Brake at removing or reinstalling qu HOOK A ea A HOOK B CZ M LEVER T BRAKE ASSY i Fig 1 17 Lever Brake S T Ass y Removal 1 2 13 Gear Idle Ass y Removal 1 2 14 Disk S T Reel Removal 1 Push the Lever Idle in the direction of arrow 1 Lift the Disk S T Reel 8 A B 2 Lift the Lever Idle Assembly 1 Apply oil in two Bosses of Lever Idle 2 Assemble the Gear Idle with the Lever Idle Note When replacing the Gear Idle be sure to add oil in the boss of Lever Idle DISK T REEL man GEAR IDLE Fig 1 19 Disk S T Reel Removal Fig 1 18 Gear Idle Ass y Removal 12 1 2 15 Holder Clutch Ass y Removal 1 Remove the Washer Slit 2 Lift the Holder Clutch Ass y 8 Note When you reinstall Holder Clutch Ass y 1 Check the condition of spring
17. rame s bottom in order to wind the unwinded tape Refer to Fig 1 34 If you rotate Gear Worm o 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 clockwise using screw driver again up to the state of eject mode and then pick out the tape Refer to Fig 1 33 18 1 3 The table of clearing Lubrication and replacement time about principal parts 1 The replacement time of parts is not life of parts 2 The table 1 1 is that the VCR Set is in normal condition normal temperature normal humidity The checking period may be changed owing to the condition of use runtime and environmental conditions 3 Life of the Cylinder Ass y is depend on the condition of use 4 See exploded view for location of each parts 19 lt Table 1 1 gt Parts Name heen EEUNA Remark 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 POST TENSION A A A A A A A A A A To clean the parts use patch and SLANT POST S T A A A LA A LA A A a A alcohol olvent T 48 GUIDE SHAFT A A LA A A A A A A A A After cleaning use the video tape p CAPSTAN SHAFT A A A A A A A A A A fer aicoholis go
18. sitional Operation from RPS to Play Check transition from RPS mode to play mode Using a pre recorded SP tape make sure the entry side of envelope comes to an appropriate steady state within 3 seconds as shown in Fig 2 9 If the envelope waveform does not reach specified peak to peak amplitude within 3 seconds adjust as follows 1 Make sure there is no gap between the supply roller lower flange and the tape If there is a gap adjust the supply guide roller again 2 Change operation mode from the RPS to the play mode again and make sure the entry side of envelope rises within 3 second ENTRANCE SIDE ENVELOPE Fig 2 9 Video Envelope Rising when Operation mode Changes from RPS to Play M ode 2 3 Reel Torgue 1 The rotation of the capstan motor causes the Holder Clutch Ass y to rotate through the Belt Pulley 2 The spring wrap PLAY REV of holder clutch ass y drives the disk reel S T through gear idle by rota tion 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 speci fications replace the holder clutch ass y and then recheck 2 2 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 2 10 2 Play back a self recorded tape recor
19. ssette Door Removal 1 2 19 Lever 9 Guide Ass y Removal dave 1 2 20 FE Head Removal 00 ceseseesseeeseeeseeesseecseessseesceesseeeseees 1 2 21 ACE Head Removal eee 1 2 22 Slider S T Ass y Removal ee 1 2 23 Plate Ground Deck Cylinder Ass y Removal 1 2 24 Belt Pulley Removal 0 eceecesseseeceescecceceeeeeeneeneees ae 1 2 26 Damper Capstan Motor Capstan Ass y Removal 18 1 2 27 How to Eject the Cassette Tape eeeeeeeeee 18 1 3 The table of clearing Lubrication and replacement time about principal parts 1 4 Tools and fixtures reguired for service 2 Alignment and Adjustment 2 1 Tape Transport System and Adjustment Locations 2 2 Tape Transport System Adjustment 00 0 eee coe 2 2 1 ACE Head Assembly Adjustment 0 0 0 0 eee eeeeeeeeeee 2 2 2 Linearity Adjustment Guide roller S T adjustment 23 2 2 3 Check Transitional Operation from RPS to Play 24 2 2 4 Envelope Check cvs setenau eres nosan 2 2 5 Tape Wrinkle Check m Dede Reel Torge ersen ost tas cs te cok tvs a n E ats 1 Disassembly and Reassembly 1 1 Deck Parts Locations 1 1 1 Top View NE Fig 1 1 Top parts Location 1 GEAR FL CAM MOTOR LOADING ASS Y LEVER FL ARM ASS Y HOLDER FL CASSETTE ASS Y LEVER FL DOOR SLIDER FL DRIVE Fig 1 2 Top Parts Locat
Download Pdf Manuals
Related Search