Toshiba W-422 Service Manual
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Toshiba W-422 Service Manual

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FILE NO. 120-200191
SERVICE MANUAL
VIDEO CASSETTE RECORDER
W-422
NOV, 2001

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Summary of Contents for Toshiba W-422

  • Page 1 FILE NO. 120-200191 SERVICE MANUAL VIDEO CASSETTE RECORDER W-422 NOV, 2001...

  • Page 2: Table Of Contents

    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 Diagrams 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: Reference Information

    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 2-12 Toshiba...
  • Page 17 Reference Information Toshiba 2-13...
  • Page 18 Reference Information 2-2 IC Blocks 2-2-1 IC301 (LA71201M) 2-14 Toshiba...
  • Page 19 Reference Information 2-2-2 IC601 (MN101D02D) Toshiba 2-15...

  • Page 20: Product Specifications

    Line input : 308 mV(rms), more than 47 Kohm, pin jack Audio output Line input : 308 mV(rms), less than 4.7 Kohm, pin jack Audio frequency range(Hi-Fi) 20Hz - 20KHz Audio dynamic range(Hi-Fi) 68dB Utilization conditions Temperature : 5°C to 40°C Humidity : less than RH 80% Toshiba...

  • Page 21: Disassembly And Reassembly

    Œ REMOVE 2 SCREWS ´ Lift up the Cabinet Top in the direction of Œ RELEASE 4 HOOKS arrow by releasing the Hook. (TOP VIEW) Fig. 4-1 Cabinet Top Removal ´ RELEASE 3 HOOKS (BOTTOM VIEW) Fig. 4-2 Ass’y Front Panel Removal Toshiba...
  • Page 22 4-1-4 Chassis Removal ˇ 4 SCREWS ¨ FLAT CABLE ˆ FLAT CABLE ’ ASS'Y-DECK Ø FLAT CABLE ˝ ASS'Y MAIN-PCB Œ 2 SCREWS ∏ RELEASE HOOK ASSEMBLY POINT (ALIGN TWO ARROWS) ´ BRACKET-FRAME ” RELEASE HOOK Fig. 4-4 Chassis Removal Toshiba...
  • Page 23 4-2-1 Top View Œ ´ ˇ ¨ ˆ Ø Fig. 4-5 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 24 ´ 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 25 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 26 "A" of the Lever FL Cassette-R ´ at disassembling and reassembling. Fig. 4-9 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 27 Œ LEVER FL ARM ASS`Y Fig. 4-12 Lever FL Arm Ass’y Removal ´ GEAR FL CAM Œ SLIDER FL DRIVE Fig. 4-10 Slider FL Drive Removal Œ GEAR FL CAM GEAR WORM WHEEL POST TIMING POINT Fig. 4-11 Gear FL Cam, Gear Worm Toshiba...
  • Page 28 Œ CABLE FLAT LOADING MOTOR CYLINDER CONNECTING PART CONNECTING PART "B" ¨ DAMPER ´ CONNECTOR WAFER CAPSTAN Œ GEAR WORM WHEEL "A" "C" Fig. 4-13 Gear Worm Wheel Removal ˇ CONNECTOR WAFER Fig. 4-14 Cable Flat Removal Toshiba...
  • Page 29 Fig. 4-15 Motor Loading Ass’y Removal Œ SCREW ´ BRAKET GEAR Fig. 4-16 Bracket Gear, Gear Joint 1,2 Removal Œ GEAR JOINT1 ´ GEAR JOINT2 ˇ SLIDER CAM TIMING POINT 2 TIMING POINT 1 Fig. 4-17 Gear Joint 1,2 Assembly Toshiba...
  • Page 30 TIMING POINT 3 Fig. 4-18 Gear Loading Drive, Slider Cam, Lever T, S Load Ass’y Removal PIN A PIN C PIN D PIN B ˇ SLIDER CAM Fig. 4-19 Gear Loading Drive, Slider Cam, Lever Load S, T Ass’y Assembly Toshiba 4-10...
  • Page 31 Main Base to the Mark[B]. ˇ BAND BRAKE ASS`Y ´ LEVER TENTION ASS`Y Œ SPRING TENTION LEVER Fig. 4-20 Lever Pinch Drive, STOPPER "A" Lever Tension Drive Removal MARK[B] Fig. 4-21 Lever Tension Ass’y, Band Brake Ass’y Removal 4-11 Toshiba...
  • Page 32 ´ GEAR IDLE "B" ´ GEAR IDLE HOOK "C" HOOK(A) ˇ SPRING BRAKE Œ LEVER S BRAKE ASS`Y HOOK(C) HOOK(B) ´ LEVER T BRAKE ASS`Y Fig. 4-23 Gear Idle Ass’y Removal Fig. 4-22 Lever Brake S, T Ass’y Removal Toshiba 4-12...
  • Page 33 Center Ass'y as shown in detail B. ´ DISK T REEL Œ WASHER SLIT ´ HOLDER CLUTCH ASS`Y Fig. 4-24 Disk S, T Reel Removal DETAIL A <BAD> SPRING <GOOD> DETAIL B SPRING <BAD> <GOOD> Fig. 4-25 Holder Clutch Ass’y Removal 4-13 Toshiba...
  • Page 34 ´ GEAR CENTER ASS`Y Fig. 4-28 Guide Cassette Door Removal Fig. 4-26 Lever Up Down Ass’y Removal GEAR CENTER ASS'Y GUIDE LEVER UP DOWN ASS'Y RING GEAR POST HOOK MAIN BASE Fig. 4-27 Lever Up Down Ass’y Removal Toshiba 4-14...
  • Page 35 Œ LEVER UNIT PINCH ASS`Y Œ SPRING #9 GUIDE ´ LEVER #9 GUIDE ASS`Y "B" ´ PLATE JOINT ˇ SPRING PINCH DRIVE Fig. 4-30 Lever #9 Guide Ass’y Removal Fig. 4-29 Lever Unit Pinch Ass’y, Plate Joint, Spring Pinch Drive Removal 4-15 Toshiba...
  • Page 36 Ass’y ´. 2) Lift the FE Head ´. 2) Remove the screw Œ. 3) Lift the ACE Head Ass’y ´. Œ FE HEAD Œ SCREW ´ HEAD ACE ASS`Y Fig. 4-31 FE Head Removal Fig. 4-32 ACE Head Removal Toshiba 4-16...
  • Page 37 2) When reinstalling, Don't push down too much on Screw Driver. Œ 3 SCREWS Fig. 4-33 Slider S, T Ass’y Removal ´ PLATE GROUND DECK ˇ CYLINDER ASS'Y Fig. 4-34 Plate Ground Deck, Cylinder Ass’y Removal 4-17 Toshiba...
  • Page 38 Main Base. After reinstalling, adjusting the tape transport system again. ´ 3 SCREWS Fig. 4-35 Belt Pulley Removal Œ DAMPER CAPSTAN ˇ MOTOR CAPSTAN ASS'Y Fig. 4-36 Damper Capstan,Motor Capstan Ass’y Removal Toshiba 4-18...
  • Page 39 3) Rotate Gear Worm Œ clockwise using screw driver Œ HOOK again up to the state of eject mode and then pick out the tape.(Refer to Fig.4-39) SLEEVE-HEAD CLEANER FRAME Fig. 4-38 Post #8 Guide Ass’y Removal Fig. 4-40 4-19 Toshiba...
  • Page 40 ∆ ∆ 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 ∆ : Cleaning O : Check and replacement in necessary : Add Oil Toshiba 4-20...

  • Page 41: Alignment And Adjustment

    5-1-1 Location of adjustment button of remote control POWER X-Point (Tracking Center) Adjustment CM SKIP VC-422 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 42 Alignment and Adjustment 5-1-2 Test point location for adjustment mode setting Short-Circuit for a second and release. Fig. 5-2 Main PCB (Top View) Toshiba...

  • Page 43: Mechanical Adjustment

    Fig. 5-3 Location of Tape Transport Adjustment PINCH ROLLER FE HEAD CYLINDER ASS'Y 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 44 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 45 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 46 ) driver to obtain a flat video RF envelope as shown in Fig. 5-11. IDEAL ENVELOPE S HEIGHT TOO HIGH S HEIGHT TOO LOW T HEIGHT TOO HIGH T HEIGHT TOO LOW GUIDE ROLLER S GUIDE ROLLER T Fig. 5-11 Guide Roller S, T Height Adjustment Toshiba...
  • Page 47 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 48: 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-422 3, 4, 6, 7, 10, 13, 16, 21, 22, 27, 28 Toshiba...

  • Page 49: Exploded View

    6-3 Mechanical Parts (Top Side) - - - - - - - - - - - - - - - - - - - - - - - 6-4 Mechanical Parts (Bottom Side) - - - - - - - - - - - - - - - - - - - - Toshiba...

  • Page 50: Packing Assembly

    Exploded View 6-1 Packing Assembly Y102 Y101 UT01 A702 A702 A701 Toshiba...

  • Page 51: Instrument Assembly

    Exploded View 6-2 Instrument Assembly Toshiba...

  • Page 52: Mechanical Parts (Top Side)

    G001 B475 K490 K502 K530 G555 G530 B474 G510 G680 B473 G420 G480 (OPTIONAL) G450 K546 K250 G560 K240 (OPTIONAL) K248 G681 B410 K350 K110 B440 B448 K182 K340 K330 B452 G546 K470 K140 K188 G070 G527 G520 G060 Toshiba...

  • Page 53: Mechanical Parts (Bottom Side)

    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 54: Replacement Parts List

    7. Replacement Parts List Loc.No. TSB Parts No. Reference No. Description ; Specification Remark - PACKING PARTS - A701 BY731057 AC69-00263D PACKING CASE;W-422/TSB,SW2,-,-,W428,L326 A702 BY730464 AC69-00041A CUSHION-F/B;M-656/TSB,EPS,-,-,-,-,- UT01 BY634676 AC59-00019S REMOCON-ASSY;VC-422,TSB,MONO,STANDARD,-, Y101 BY634687 AC68-01704A MANUAL USERS;W-522/W-422,TSB,-,-,MOJO100 Y102 BY634274 AC39-42001J CABLE-RF ASSY;#1365,-,1.2MT,75-75OHM,-,-...

  • Page 55: Electrical Parts

    AC61-60561A SPRING ETC-FL.LEVER-LR;X-9,SUS304 WPB,OD K530 BY730758 AC66-00034A LEVER-FL ARM ASS’Y;TS-10,-,-,-,-,-,-,- K546 BY730086 AC61-50658A GUIDE-CASS. DOOR;X-9,POM,-,-,-,NTR - ELECTRICAL PARTS - BY630240 AC92-01077E ASSY PCB-MAIN;W-422/TSB,TS-10A,4HD,120V < INTEGRATED CIRCUITS > IC1SS1 BY530021 0604-000186 PHOTO-COUPLER;TR,-,200mW,DIP-4,ST IC1SS2 70795271 AC14-12006D IC;KA431Z,TO-92,TAPING IC301 BY631174 1204-001832 IC-VIDEO PROCESS;LA71201,QFP,80P,-,PLAST...
  • Page 56 70796098 2301-000129 C-FILM,PEF;100nF,5%,50V,TP,10X9X4.3X5,5m C1SS35 BY130050 2401-003059 C-AL;1000UF,20%,16V,WT,TP,10X16,5 C301 BY130042 2401-000598 C-AL;1uF,20%,50V,GP,TP,4x7,5 C302 BY130031 2203-001721 C-CERAMIC,CHIP;360pF,5%,50V,NPO,TP,2012, C303 BY130191 2203-000476 C-CERAMIC,CHIP;1000nF,+80-20%,16V,Y5V,TP C304 72531470 2203-000408 C-CERAMIC,CHIP;0.18nF,5%,50V,NP0,TP,2012 C305 BY130042 2401-000598 C-AL;1uF,20%,50V,GP,TP,4x7,5 C306 BY130352 2203-000206 C-CERAMIC,CHIP;100nF,10%,50V,X7R,TP,2012 C307 BY130282 2401-003107 C-AL;47uF,20%,16V,GP,TP,5x7,5 C308 BY130044 2401-000922 C-AL;22uF,20%,16V,GP,TP,5x5,5 Toshiba...
  • Page 57 70795075 2202-000797 C-CERAMIC,MLC-AXIAL;10NF,30%,16V,Y5S,TP, C616 70796281 2203-000260 C-CERAMIC,CHIP;10nF,10%,50V,X7R,TP,2012 C617 BY130282 2401-003107 C-AL;47uF,20%,16V,GP,TP,5x7,5 C618 BY130152 2203-000634 C-CERAMIC,CHIP;0.022nF,5%,50V,NP0,TP,201 C619 BY130154 2203-000683 C-CERAMIC,CHIP;0.027nF,5%,50V,NP0,TP,201 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 70796281 2203-000260 C-CERAMIC,CHIP;10nF,10%,50V,X7R,TP,2012 C626 BY130027 2202-002037 C-CERAMIC,MLC-AXIAL;100nF,80-20%,50V,Y5V Toshiba...
  • Page 58 BY230094 2007-000757 R-CHIP;330KOHM,5%,1/10W,DA,TP,2012 R330 70795688 2007-000401 R-CHIP;150OHM,5%,1/10W,DA,TP,2012 R331 BY230093 2007-000615 R-CHIP;24KOHM,5%,1/10W,DA,TP,2012 R332 70795515 2007-000468 R-CHIP;1KOHM,5%,1/10W,DA,TP,2012 R333 BY230019 2001-000221 R-CARBON;1.2KOHM,5%,1/8W,AA,TP,1.8X3.2M R334 70795527 2007-000586 R-CHIP;22KOHM,5%,1/10W,DA,TP,2012 R335 70795705 2007-000941 R-CHIP;47KOHM,5%,1/10W,DA,TP,2012 R336 70795516 2007-000300 R-CHIP;10KOHM,5%,1/10W,DA,TP,2012 R337 70795526 2007-000493 R-CHIP;2.2KOHM,5%,1/10W,DA,TP,2012 R338 70795683 2007-000290 R-CHIP;100OHM,5%,1/10W,DA,TP,2012 Toshiba...
  • Page 59 70795006 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R723 70795006 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R724 70795006 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R725 70795006 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R726 70795054 2001-000969 R-CARBON;75OHM,5%,1/8W,AA,TP,1.8X3.2MM R728 70795054 2001-000969 R-CARBON;75OHM,5%,1/8W,AA,TP,1.8X3.2MM R729 70795054 2001-000969 R-CARBON;75OHM,5%,1/8W,AA,TP,1.8X3.2MM R730 70795054 2001-000969 R-CARBON;75OHM,5%,1/8W,AA,TP,1.8X3.2MM R731 70795054 2001-000969 R-CARBON;75OHM,5%,1/8W,AA,TP,1.8X3.2MM R732 70795054 2001-000969 R-CARBON;75OHM,5%,1/8W,AA,TP,1.8X3.2MM Toshiba...
  • Page 60 3404-001182 SWITCH-TACT;DC12V,50MA,100GF,6.0X6.0X5.0 SW709 BY632011 3404-001182 SWITCH-TACT;DC12V,50MA,100GF,6.0X6.0X5.0 SW710 BY632011 3404-001182 SWITCH-TACT;DC12V,50MA,100GF,6.0X6.0X5.0 SW711 BY632011 3404-001182 SWITCH-TACT;DC12V,50MA,100GF,6.0X6.0X5.0 SW721 BY632011 3404-001182 SWITCH-TACT;DC12V,50MA,100GF,6.0X6.0X5.0 SW722 BY632011 3404-001182 SWITCH-TACT;DC12V,50MA,100GF,6.0X6.0X5.0 TM401 BY634275 AC40-00007A TM BLOCK;115VD025AP,NTSC-M,115VD025AP,Y VA1SS1 BY634022 1405-001026 VARISTOR;470V,600A,9x7mm,TP XT301 BY633012 2801-003399 CRYSTAL-UNIT;3.579545MHz,15ppm,28-AAA,S, XT601 70796216 2801-001384 CRYSTAL-UNIT;14.31818MHz,30ppm,28-AAA,16 Toshiba...
  • Page 61 TOSHIBA VIDEO PRODUCTS PTE LTD 438B ALEXANDRA ROAD BLOCK B #06-01 ALEXANDRA TECHNOPARK SINGAPORE 119968...

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