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Toshiba W-412 Service Manual

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FILE NO. 120-200024
SERVICE MANUAL
VIDEO CASSETTE RECORDER
W-412
DEC, 2000

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Summary of Contents for Toshiba W-412

  • Page 1 FILE NO. 120-200024 SERVICE MANUAL VIDEO CASSETTE RECORDER W-412 DEC, 2000...
  • Page 2 TOTAL CONTENTS 1. Precautions 2. Reference Information 3. Product Specifications 4. Disassembly and Reassembly 5. Alignment and Adjustment 6. Exploded View 7. Replacement Parts List 8. Block Diagram 9. PCB Diagram 10. Schematic Diagrams...
  • Page 3 Alternatively, wear a discharging Wrist-strap device. (Be sure to remove it prior to applying power--this is an electric shock precaution.) Toshiba...
  • Page 4 Always inspect for pinched, out- of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that leads and components do not touch thermally hot parts. Toshiba...
  • Page 5 2. Reference Information 2-1 Operation of Controls Toshiba...
  • Page 6 Reference Information Toshiba...
  • Page 7 Reference Information Toshiba...
  • Page 8 Reference Information Toshiba...
  • Page 9 Reference Information Toshiba...
  • Page 10 Reference Information Toshiba...
  • Page 11 Reference Information Toshiba...
  • Page 12 Reference Information Toshiba...
  • Page 13 Reference Information Toshiba...
  • Page 14 Reference Information 2-10 Toshiba...
  • Page 15 Reference Information Toshiba 2-11...
  • Page 16 Reference Information 2-2 IC Blocks 2-2-1 IC301 (LA71200M) 2-12 Toshiba...
  • Page 17 Reference Information 2-2-2 IC601 (MN101D02D) Toshiba 2-13...

  • Page 18: Product Specifications

    Audio input Line input : 308 mV(rms), more than 47 Kohm, pin jack Audio output Line input : 308 mV(rms), less than 47 Kohm, pin jack Utilization conditions Temperature : 5°C to 40°C Humidity : less than RH 80% Toshiba...

  • Page 19: Disassembly And Reassembly

    Œ REMOVE 2 SCREWS ´ Lift up the Cabinet Top in the direction of arrow by releasing the Hook. Œ RELEASE 4 HOOKS (Top View) Fig. 4-1 Cabinet Top Removal ´ RELEASE 3 HOOKS (Bottom View) Fig. 4-2 Ass’y Front Panel Removal Toshiba...
  • Page 20 4-1-3 Chassis Removal ¨ FLAT CABLE ˆ FLAT CABLE ˇ 3 SCREWS Ø CONNECTOR ˝ ASS'Y-DECK ’ ASS'Y MAIN-PCB Œ 2 SCREWS ∏ RELEASE HOOK ASSEMBLY POINT (ALIGN TWO ARROWS) ´ BRACKET-FRAME ” RELEASE HOOK Fig. 4-3 Chassis Removal Toshiba...
  • Page 21 4-2-1 Top View Œ ´ ˇ ¨ ˆ Ø Fig. 4-4 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 Toshiba...
  • Page 22 ´ CYLINDER ASS’Y ˝ GEAR IDLE ˇ ACE HEAD ASS’Y Ô LEVER IDLE ¨ LEVER UNIT PINCH ASS’Y  LEVER T BRAKE ASS’Y ˆ LEVER #9 GUIDE ASS’Y Ò DISK T REEL Ø LEVER TENSION ASS’Y ∏ BAND BRAKE ASS’Y Toshiba...
  • Page 23 Œ GEAR JOINT 1 ´ GEAR JOINT 2 ˇ BRACKET 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 Toshiba...
  • Page 24 Lever FL Cassette-R ´ at disassembling and "B" reassembling. ´ LEVER FL DOOR ˇ HOOK "C" Fig. 4-7 Lever FL Door Removal RAIL [B] Œ HOLDER FL ´ LEVER FL CASSETTEE -R CASSETTEE ASS`Y "A" BOSS [A] Fig. 4-8 Holder FL Cassette Ass’y Removal Toshiba...
  • Page 25 Œ LEVER FL ARM ASS`Y Fig. 4-11 Lever FL Arm Ass’y Removal ´ GEAR FL CAM Œ SLIDER FL DRIVE Fig. 4-9 Slider FL Drive Removal Œ GEAR FL CAM GEAR WORM WHEEL POST TIMING POINT Fig. 4-10 Gear FL Cam, Gear Worm Toshiba...
  • Page 26 1) Remove the screw Œ. 1) Remove the Gear Worm wheel Œ. 2) Remove the Motor Loading Ass’y ´. ´ MOTOR LOADING ASS`Y Œ SCREW Œ GEAR WORM WHEEL Fig. 4-13 Motor Loading Ass’y Removal Fig. 4-12 Gear Worm Wheel Removal Toshiba...
  • Page 27 Fig. 4-14 Bracket Gear, Gear Joint 1,2 Removal Fig. 4-16 Gear Loading Drive, Slider Cam, Lever T, S Load Ass’y Removal Œ GEAR JOINT1 ´ GEAR JOINT2 ˇ SLIDER CAM TIMING POINT 2 TIMING POINT 1 Fig. 4-15 Gear Joint 1,2 Assembly Toshiba...
  • Page 28 LEVER LOAD T LEVER LOAD S Lever Tension Drive Removal TIMING POINT 2 TIMING POINT 3 PIN A PIN C PIN D PIN B ˇ SLIDER CAM Fig. 4-17 Gear Loading Drive, Slider Cam, Lever Load S, T Ass’y Assembly Toshiba 4-10...
  • Page 29 ˇ SPRING BRAKE Œ SPRING TENTION LEVER STOPPER Œ LEVER S BRAKE ASS`Y "A" HOOK(C) MARK[B] HOOK(B) ´ LEVER T BRAKE ASS`Y Fig. 4-19 Lever Tension Ass’y, Band Brake Ass’y Removal Fig. 4-20 Lever Brake S, T Ass’y Removal 4-11 Toshiba...
  • Page 30 ´ DISK T REEL add oil in the boss of Lever Idle Œ. "A" Œ LEVER IDLE ´ GEAR IDLE "B" ´ GEAR IDLE HOOK "C" Fig. 4-22 Disk S, T Reel Removal Fig. 4-21 Gear Idle Ass’y Removal Toshiba 4-12...
  • Page 31 DETAIL B Fig. 4-24 Lever Up Down Ass’y Removal SPRING GEAR CENTER ASS'Y GUIDE LEVER UP DOWN ASS'Y RING <GOOD> <BAD> GEAR POST HOOK Fig. 4-23 Holder Clutch Ass’y Removal MAIN BASE Fig. 4-25 Lever Up Down Ass’y Removal 4-13 Toshiba...
  • Page 32 Œ GUIDE CASSETTE DOOR Œ LEVER UNIT PINCH ASS`Y HOOK [A] ´ PLATE JOINT ˇ SPRING PINCH DRIVE Fig. 4-26 Guide Cassette Door Removal Fig. 4-27 Lever Unit Pinch Ass’y, Plate Joint, Spring Pinch Drive Removal Toshiba 4-14...
  • Page 33 2) After reinstalling, check the bottom side of the Post #9 Guide to the top side of Main Base. "A" Œ SPRING #9 GUIDE ´ LEVER #9 GUIDE ASS`Y "B" Fig. 4-29 FE Head Removal Fig. 4-28 Lever #9 Guide Ass’y Removal 4-15 Toshiba...
  • Page 34 2) Remove the screw Œ. 3) Lift the ACE Head Ass’y ´. Œ SLIDER S ASS`Y Œ SCREW ´ SLIDER T ASS`Y ´ HEAD ACE ASS`Y Fig. 4-31 Slider S, T Ass’y Removal Fig. 4-30 ACE Head Removal Toshiba 4-16...
  • Page 35 1) Release the Hook Œ. 2) Lift the Lever Head Cleaner Ass’y ´. ´ LEVER HEAD CLEANER ASS'Y Œ HOOK SLEEVE-HEAD CLEANER ˇ CYLINDER ASS'Y Fig. 4-32 Plate Ground Deck, Cylinder Ass’y Removal Fig. 4-34 Level Head Cleaner Ass’y Removal 4-17 Toshiba...
  • Page 36 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. 4-36) ˇ MOTOR CAPSTAN ASS'Y Fig. 4-35 Damper Capstan,Motor Capstan Ass’y Removal FRAME Fig. 4-37 Toshiba 4-18...
  • Page 37 ∆ CAPSTAN MOTOR PULLEY BELT PULLEY ∆ HOLDER CLUTCH ASS’Y GEAR CENTER ASS’Y GEAR IDLE (2Point) LOADING MOTOR BAND BRAKE ASS’Y BRAKE T ASS’Y ◆ : Add Oil ∆ : Cleaning O : Check and replacement in necessary 4-19 Toshiba...

  • Page 38: Alignment And Adjustment

    5-1-1 Location of adjustment button of remote control POWER X-Point (Tracking Center) Adjustment VC-413 EJECT PLAY ENTER STOP SLOW PAUSE/STILL REMAIN/ COUNT DISPLAY SP/ SLP COUNTER RESET Head Switching Adjustment TIMER I.SELECT TV VOL PROG. CANCEL NVRAM Option Setting Fig. 5-1 Toshiba...
  • Page 39 Alignment and Adjustment 5-1-2 Test point location for adjustment mode setting Short-Circuit for few seconds and release. (Just one time) Fig. 5-2 Main PCB (Top View) Toshiba...

  • Page 40: Mechanical Adjustment

    Fig. 5-3 Location of Tape Transport Adjustment FE HEAD CYLINDER ASS'Y PINCH ROLLER GUIDE ROLLER "S" GUIDE ROLLER "T" POST TENSION #8 GUIDE POST #9 GUIDE POST #3 GUIDE POST MAIN BASE ACE HEAD CAPSTAN SHAFT Fig. 5-4 Tape Travel Diagram Toshiba...
  • Page 41 Test point : TP601 (Control Pulse) TP602 (H’D S/W -Trigger) TP301 (Envelope) TP302 (Audio output) TP303 (Video output) Test tape : ST-N1 BLANK TAPE : T-160 AUDIO OUTPUT ENVELOPE HEAD SWITCHING Fig. 5-5 Location of Test point (Main PCB-Top View) Toshiba...
  • Page 42 4) Connect the CH-1 probe to TP301 (Envelope) the CH-2 probe to TP602 (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 wavwform is maximum. 6) Turn the Power off. Toshiba...
  • Page 43 ) driver to obtain a flat video RF envelope as shown in Fig. 5-11. IDEAL ENVELOPE S HEIGHT TOO HIGH T HEIGHT TOO HIGH S HEIGHT TOO LOW T HEIGHT TOO LOW GUIDE ROLLER S GUIDE ROLLER T Fig. 5-11 Guide Roller S, T Height Adjustment Toshiba...
  • Page 44 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. Toshiba...

  • Page 45: Head Switching Point Adjustment

    17 18 19 20 21 22 23 24 17 18 19 20 21 22 23 24 ENTER : SAVE ENTER : SAVE Fig. 5-14 Fig. 5-15 <Table 5-2> MODEL OPTION NUMBER W-412 6, 10, 11, 14, 19, 21, 23 Toshiba...

  • Page 46: Exploded View

    6-3 Mechanical Parts (Top Side) - - - - - - - - - - - - - - - - - - - - - - - 6-4 Mechanical Parts (Bottom Side) - - - - - - - - - - - - - - - - - - - - Toshiba...
  • Page 47 Exploded View 6-1 Packing Assembly Y102 Y101 UT01 A702 A702 A701 Toshiba...

  • Page 48: Instrument Assembly

    Exploded View 6-2 Instrument Assembly Toshiba...
  • Page 49 6-3 Mechanical Parts (Top Side) G001 K490 K502 K530 G555 B473 G530 B474 G450 G510 G680 G420 G480 (OPTIONAL) K546 K250 K240 (OPTIONAL) K248 B575 G681 B410 K350 K110 B440 K182 B448 K340 K330 B452 G546 K470 K140 K188 G527 G520 G070 G060 Toshiba...
  • Page 50 Exploded View 6-4 Mechanical Parts (Bottom Side) G542 B462 B456 B560 B460 B500 B458 B464 B488 B501 B489 B484 B468 K222 K200 K225 K221 B478 B570 Toshiba...

  • Page 51: Replacement Parts List

    7. Replacement Parts List Loc.No. TSB Parts No. Reference No. Description ; Specification Remark - PACKING PARTS - A701 BY730777 AC69-00039N PACKING CASE;W-412/TSB,SW2MA+LAMI,-,-,42 A702 BY730464 AC69-00041A CUSHION-F/B;M-656/TSB,EPS,-,-,-,-,- UT01 BY730782 AC59-00019G REMOCON-ASSY;VC-413T,TSB,MONO,-,-,-,-,-, Y101 BY634424 AC68-01085A MANUAL USERS;W-412/TSB,-,-,-,MOJO100,-,W Y102 BY634274 AC39-42001J CABLE-RF ASSY;#1365,-,1.2MT,75-75OHM,-,-...

  • Page 52: Electrical Parts

    BY730091 AC61-60561A SPRING-FL.LEVER-LR;-,ES,SUS304 WPB,PI2.7 K530 BY730758 AC66-00034A LEVER-FL ARM ASS’Y;TS-10,-,-,-,-,-,-,- K546 BY730086 AC61-50658A GUIDE-CASS. DOOR;X-9,POM,-,NTR,-,- - ELECTRICAL PARTS - BY630153 AC92-00765G ASSY PCB-MAIN;W-412/TSB,TS-10,4HD,120V - INTEGRATED CIRCUIT - IC1SS1 BY530004 0604-001028 PHOTO-COUPLER;TR,50-600%,250mW,DIP-4,ST IC1SS2 BY631008 AC14-12006D IC;KA431Z,TO-92,TAPING IC301 BY631153 1204-001755 IC-VIDEO PROCESS;LA71200M,QFP,80P,-,PLAS...
  • Page 53 BY130282 2401-003107 C-AL;47uF,20%,16V,GP,TP,5x7,5 C308 70699092 2401-000918 C-AL;22uF,20%,16V,GP,-,6.3x7,5 C309 BY130273 2401-000414 C-AL;10uF,20%,16V,GP,TP,4x7,5 C310 70795114 2401-001915 C-AL;1uF,20%,50V,GP,TP,3x5,5 C312 BY130027 2202-002037 C-CERAMIC,MLC-AXIAL;100nF,80-20%,50V,Y5V C313 BY130273 2401-000414 C-AL;10uF,20%,16V,GP,TP,4x7,5 C314 BY130191 2203-000476 C-CERAMIC,CHIP;1000nF,+80-20%,16V,Y5V,TP C315 BY130042 2401-000598 C-AL;1uF,20%,50V,GP,TP,4x7,5 C316 BY130042 2401-000598 C-AL;1uF,20%,50V,GP,TP,4x7,5 C317 70795114 2401-001915 C-AL;1uF,20%,50V,GP,TP,3x5,5 Toshiba...
  • Page 54 C-CERAMIC,CHIP MELF;22PF,5%,50V,SL,TP,20 C622 BY130042 2401-000598 C-AL;1uF,20%,50V,GP,TP,4x7,5 C623 BY130069 2202-000121 C-CERAMIC,MLC-AXIAL;100pF,10%,50V,Y5P,TP C624 BY130280 2401-002165 C-AL;100uF,20%,16V,GP,TP,6.3x7,5 C625 70796207 2203-001557 C-CERAMIC,CHIP;100nF,+80-20%,25V,Y5V,TP, C626 70796207 2203-001557 C-CERAMIC,CHIP;100nF,+80-20%,25V,Y5V,TP, C627 70796209 2203-001696 C-CERAMIC,CHIP MELF;82PF,10%,50V,Y5P,TP, C628 BY130277 2401-001169 C-AL;33uF,20%,16V,GP,-,6.3x7,2.5mm C629 BY130038 2203-005548 C-CERAMIC,CHIP MELF;15nF,+80-20%,16V,Y5V C630 BY130049 2401-002144 C-AL;47uF,20%,16V,GP,TP,5x11,5 Toshiba...
  • Page 55 70795016 2001-000411 R-CARBON;18KOHM,5%,1/8W,AA,TP,1.8X3.2MM R318 70795016 2001-000411 R-CARBON;18KOHM,5%,1/8W,AA,TP,1.8X3.2MM R319 70795006 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R320 70795230 2007-001637 R-CHIP,MELF;1.2Kohm,5%,1/8W,DB,BK,2012 R322 BY230038 2001-000812 R-CARBON;5.6KOHM,5%,1/8W,AA,TP,1.8X3.2M R326 70795230 2007-001637 R-CHIP,MELF;1.2Kohm,5%,1/8W,DB,BK,2012 R327 70795215 2007-001497 R-CHIP,MELF;5.6KOHM,5%,1/8W,DB,BK,2012 R328 70795233 2007-001623 R-CHIP,MELF;10Kohm,5%,1/8W,DB,BK,2012 R329 70796278 2007-001538 R-CHIP,MELF;330KOHM,5%,1/8W,DB,BK,2012 R330 70795218 2007-001570 R-CHIP,MELF;220ohm,5%,1/8W,DB,BK,2012 Toshiba...
  • Page 56 70795005 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM R692 70795005 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM R6B01 70796025 2001-000458 R-CARBON;2.2OHM,5%,1/8W,AA,TP,1.8X3.2MM R701 70795210 2007-001584 R-CHIP,MELF;2.2Kohm,5%,1/8W,DB,BK,2012 R703 70795233 2007-001623 R-CHIP,MELF;10Kohm,5%,1/8W,DB,BK,2012 R704 70795020 2001-000449 R-CARBON;2.2KOHM,5%,1/8W,AA,TP,1.8X3.2M R705 70795020 2001-000449 R-CARBON;2.2KOHM,5%,1/8W,AA,TP,1.8X3.2M R706 70795020 2001-000449 R-CARBON;2.2KOHM,5%,1/8W,AA,TP,1.8X3.2M R707 70795020 2001-000449 R-CARBON;2.2KOHM,5%,1/8W,AA,TP,1.8X3.2M R708 70795006 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM Toshiba...
  • Page 57 BY632001 3404-000165 SWITCH-TACT;12V,50mA,160gf,6x6mm,SPST SW710 BY632001 3404-000165 SWITCH-TACT;12V,50mA,160gf,6x6mm,SPST SW711 BY632001 3404-000165 SWITCH-TACT;12V,50mA,160gf,6x6mm,SPST SW7W17 BY632001 3404-000165 SWITCH-TACT;12V,50mA,160gf,6x6mm,SPST SW7W18 BY632001 3404-000165 SWITCH-TACT;12V,50mA,160gf,6x6mm,SPST TM401 BY634275 AC40-00007A TM-BLOCK;115VD025AP,NTSC-M,115VD025AP,Y VA1SS1 BY634022 1405-001026 VARISTOR;470V,600A,9x7mm,TP XT301 BY633004 2801-003610 CRYSTAL-UNIT;3.579545MHz,8ppm,28-AAA,S,1 XT601 70796216 2801-001384 CRYSTAL-UNIT;14.31818MHz,30ppm,28-AAA,16 XT602 BY633003 2801-003318 CRYSTAL-UNIT;32.768KHz,20ppm,28-AAP,12.5 Toshiba...
  • Page 58 8. Block Diagram (HI-FI MODEL ONLY) Toshiba...
  • Page 59 9-1 Main - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Toshiba...
  • Page 60 PCB Diagram 9-1 Main Toshiba...
  • Page 61 PCB Diagram Toshiba...
  • Page 62 10-5 Display - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10-7 Toshiba 10-1...

  • Page 63: Block Identification Of Main Pcb

    Important safety notices : Components identified with the mark have the special characteristics for safety. When replacing any of these components. Use only the same type. ◆ Block Identification of Main PCB Component Side Conductor Side 10-2 Toshiba...
  • Page 64 Schematic Diagrams 10-1 S.M.P.S./Power Toshiba 10-3...
  • Page 65 Schematic Diagrams 10-2 Logic 10-4 Toshiba...
  • Page 66 Schematic Diagrams 10-3 A/V Toshiba 10-5...
  • Page 67 Schematic Diagrams 10-4 TM-Block/Input-Ouput 10-6 Toshiba...
  • Page 68 Schematic Diagrams 10-5 Display Toshiba 10-7...
  • Page 69 TOSHIBA VIDEO PRODUCTS PTE LTD 438B ALEXANDRA ROAD BLOCK B #06-01 ALEXANDRA TECHNOPARK SINGAPORE 119968...

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