Toshiba VTV1400 Service Manual
Toshiba VTV1400 Service Manual

Toshiba VTV1400 Service Manual

Color television/ video cassette recorder

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FILE NO. 140-200220
SERVICE MANUAL
COLOR TELEVISION/
VIDEO CASSETTE RECORDER
VTV1400

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Summary of Contents for Toshiba VTV1400

  • Page 1 FILE NO. 140-200220 SERVICE MANUAL COLOR TELEVISION/ VIDEO CASSETTE RECORDER VTV1400...
  • Page 2: Servicing Notices On Checking

    SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. AVOID AN X-RAY As for the places which need special attentions, Safety is secured against an X-ray by consider- they are indicated with the labels or seals on the ing about the cathode-ray tube and the high cabinet, chassis and parts.
  • Page 3: Table Of Contents

    TABLE OF CONTENTS SERVICING NOTICES ON CHECKING ..................A1-1 HOW TO ORDER PARTS ......................A1-1 TABLE OF CONTENTS ......................A2-1 GENERAL SPECIFICATIONS ....................A3-1~A3-5 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS ..........B1-1, B1-2 2. REMOVAL OF DECK PARTS .................... B2-1~B2-6 3.
  • Page 4: General Specifications

    GENERAL SPECIFICATIONS CRT Size / Visual Size 14 inch / 335.4mmV System CRT Type Normal Deflection degree Magnetic Field BV/BH +0.45G / +0.18G Color System Speaker 1Speaker Position Front Size 1.5 x 2.5 Inch Impedance 8 ohm Sound Output 1.5 W 10%(Typical) 1.0 W System...
  • Page 5 GENERAL SPECIFICATIONS On Screen Menu Display Menu Type Character Timer Rec Set Channel Setup Auto Tuning Ch Mapping Ch Tuning Ch Allocation TV Setup On/Off Timer Set Picture Audio VCR Setup Auto Repeat On/Off System Select Scene Repeat System Setup Clock Set Yes (Calendar 24h) Language...
  • Page 6 GENERAL SPECIFICATIONS G-12 Remote Unit RC-DM Control Glow in Dark Remocon Power Source Voltage(D.C) UM size x pcs UM-4 x 2 pcs Total Keys Keys Keys Power 0/AV CH/Tr Up CH/Tr Up/Page Up CH/Tr Down CH/Tr Down /Page Down Volume Up Volume Down Play/Up Play/Up/Slow...
  • Page 7 GENERAL SPECIFICATIONS G-13 Features Auto Head Cleaning Auto Tracking HQ (VHS Standard High Quality) Auto Power On, Auto Play, Auto Rewind, Auto Eject Auto Shut Off Auto Repeat VIDEO PLUS+(SHOWVIEW,G-CODE) CH Auto Set-Up/Auto Clock Forward / Reverse Picture Search One Touch Playback Auto Tuning Anti-Theft End Call...
  • Page 8 GENERAL SPECIFICATIONS G-15 Interface Switch Front Power Play Pause/Still System Select One Touch Playback Input Select Channel Up Channel Down F.FWD/Cue Eject/Stop Main Power SW Volume Up Volume Down Rew/Rev Rec/OTR Rear Main Power SW Indicator Standby Rec/OTR T-Rec On Timer Key Light up Rec/OTR One Touch Playback...
  • Page 9: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS 1-3: TV/VCR BLOCK (Refer to Fig. 1-3) Remove the 2 screws 1. AND P.C. BOARDS Disconnect the following connectors: 1-1: BACK CABINET (Refer to Fig. 1-1) (CP302, CP402, CP501 and CP502). Remove the 6 screws 1. Unlock the support 2.
  • Page 10 DISASSEMBLY INSTRUCTIONS 1-5: DECK SHIELD PLATE (Refer to Fig. 1-5) 1-7: JACK PLATE AND SYSCON PCB (Refer to Fig. 1-7) Remove the 2 screws 1. Remove the screw 1. Remove the 2 screws 2. Remove the Deck Shield Plate in the direction of arrow (A). Remove the screw 2.
  • Page 11: Removal Of Deck Parts

    DISASSEMBLY INSTRUCTIONS 2. REMOVAL OF DECK PARTS NOTE In case of the Locker R installation, check if the two 2-1: TOP BRACKET (Refer to Fig. 2-1) positions of Fig.2-3-B are correctly locked. Extend the 2 supports 1. When you install the Cassette Side R, be sure to move Slide the 2 supports 2 and remove the Top Bracket.
  • Page 12 DISASSEMBLY INSTRUCTIONS 2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A) 2-7: TENSION ASS'Y (Refer to Fig. 2-7-B) Remove the screw 1. Turn the Pinch Roller Cam clockwise so that the Remove the Loading Motor. Tension Holder hook is set to the position of Fig. 2-7-A Remove the Worm.
  • Page 13 DISASSEMBLY INSTRUCTIONS 2-8: T BRAKE ARM/T BRAKE BAND (Refer to Fig. 2-8-A) Remove the T Brake Spring. Idler Gear Turn the T Brake Arm clockwise and bend the hook Idler Arm Ass'y section to remove it. Unlock the 2 supports 1 and remove the T Brake S Reel Band.
  • Page 14 DISASSEMBLY INSTRUCTIONS 2-10: CASSETTE OPENER/PINCH ROLLER BLOCK/ P5 ARM ASS'Y (Refer to Fig. 2-10-A) Unlock the support 1 and remove the Cassette Opener. Remove the Pinch Roller Block and P5 Arm Ass'y. Cassette Opener Spring Position Fig. 2-11-B 2-12: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-12) Pinch Roller Block Remove the screw 1.
  • Page 15 DISASSEMBLY INSTRUCTIONS 2-14: CAPSTAN DD UNIT (Refer to Fig. 2-14-A) 2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR (Refer to Fig. 2-15-A) Remove the Capstan Belt. Remove the 3 screws 1. Remove the E-Ring 1, then remove the Main Cam. Remove the E-Ring 2, then remove the Pinch Roller Remove the Capstan DD Unit.
  • Page 16 DISASSEMBLY INSTRUCTIONS NOTE 2-18: CASSETTE GUIDE POST/INCLINED BASE S/T UNIT/P4 CAP (Refer to Fig. 2-18-A) 1. When you install the Loading Arm S Unit, Loading Arm T Unit and Main Loading Gear, align each marker. Remove the P4 Cap. Unlock the support 1 and remove the Cassette Guide (Refer to Fig.
  • Page 17: Removal Of Anode Cap

    DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction 3. REMOVAL OF ANODE CAP to remove the other. Read the following NOTED items before starting work. NOTE After turning the power off there might still be a potential Take care not to damage the Rubber Cap.
  • Page 18: Removal And Installation Of Flat Package Ic

    DISASSEMBLY INSTRUCTIONS REMOVAL AND INSTALLATION OF When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using FLAT PACKAGE IC a tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 4-3.) REMOVAL NOTE Put the Masking Tape (cotton tape) around the Flat...
  • Page 19 DISASSEMBLY INSTRUCTIONS INSTALLATION When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin- Take care of the polarity of new IC and then install the tip Soldering Iron. (Refer to Fig. 4-8.) new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.
  • Page 20: Key To Abbreviations

    KEY TO ABBREVIATIONS Audio/Control H.SW Head Switch Automatic Color Control Hertz Audio Erase Integrated Circuit Automatic Frequency Control Intermediate Frequency Automatic Fine Tuning Indicator AFT DET Automatic Fine Tuning Detect Inverter Automatic Gain Control Killer Amplifier Left Antenna Light Emitting Diode A.PB Audio Playback LIMIT AMP...
  • Page 21 KEY TO ABBREVIATIONS SYNC Synchronization SYNC SEP Sync Separator, Separation Transistor TRAC Tracking TRICK PB Trick Playback Test Point UNREG Unregulated Volt Voltage Controlled Oscillator Video Intermediate Frequency Vertical Pulse, Voltage Display V.PB Video Playback Variable Resistor V.REC Video Recording Visual Search Fast Forward Visual Search Rewind Voltage Super Source...
  • Page 22: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter SERVICE MODE, Unplug AC cord till lost actual clock time. Then press and hold Vol (-) button of main unit and remocon key for more than 2 seconds.
  • Page 23: Preventive Checks And Service Intervals

    PREVENTIVE CHECKS AND SERVICE INTERVALS The following standard table depends on environmental conditions and usage. Parts replacing time does not mean the life span for individual parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. The following list means standard hours, so the checking hours depends on the conditions.
  • Page 24 PREVENTIVE CHECKS AND SERVICE INTERVALS CLEANING NOTE 2. TAPE RUNNING SYSTEM After cleaning the heads with isopropyl alcohol, do not When cleaning the tape transport system, use the run a tape until the heads dry completely. If the heads gauze moistened with isopropyl alcohol. are not completely dry and alcohol gets on the tape, 3.
  • Page 25: When Replacing Eeprom (Memory) Ic

    WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. NOTE: Initial Data setting will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 30 minutes before Power On or alternatively, discharge backup capacitor.
  • Page 26: Servicing Fixtures And Tools

    SERVICING FIXTURES AND TOOLS Alignment Tape Back tension cassette gauge Torque cassette gauge Taper nut driver (KT-300NR) ST-C6 ST-C7 70909103 70909199 70909228 VTR cleaning kit VTR lubrication kit Grease JG002B Adapter JG002E Dial Torque Gauge (10~90gf•cm) JG002F (60~600gf•cm) JG022 Master Plane JG024A Reel Disk Height JG153 X Value Adjustment JG154 Cable...
  • Page 27: Mechanical Adjustments

    MECHANICAL ADJUSTMENTS 1. CONFIRMATION AND ADJUSTMENT 1-2: CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION Read the following NOTES before starting work. Set to the PLAY mode. • Place an object which weighs between 450g~500g on Adjust the adjusting section for the Tension Arm the Cassette Tape to keep it steady when you want to position so that the Tension Arm top is within the make the tape run without the Cassette Holder.
  • Page 28 MECHANICAL ADJUSTMENTS 1-4: CONFIRMATION OF VSR TORQUE NOTE Install the Torque Gauge (JG002F) and Adapter (JG002B) If the torque is out of the range, replace the following on the S Reel. Set to the Picture Search (Rewind) mode. parts. (Refer to Fig.1-4-B) Check item Replacement Part Then, confirm that it indicates 120~180gf•cm.
  • Page 29 MECHANICAL ADJUSTMENTS 2-2: CONFIRMATION AND ADJUSTMENT OF AUDIO/ 2-3: TAPE RUNNING ADJUSTMENT CONTROL HEAD (X VALUE ADJUSTMENT) When the Tape Running Mechanism does not work well, Confirm and adjust the height of the Reel Disk. adjust the following items. (Refer to item 1-1) Confirm and adjust the position of the Tension Post.
  • Page 30 MECHANICAL ADJUSTMENTS 3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE 1. Tension Connect P4 Post 2. Tension Arm T Brake Spring 3. Guide Roller T Reel 4. Audio/Control Head S Reel 5. X value adjustment driver hole Adjusting section for the Tension Arm position D2-4...
  • Page 31: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. ADJUSTMENT PROCEDURE 2. BASIC ADJUSTMENTS Read and perform these adjustments when repairing the (VCR SECTION) circuits or replacing electrical parts or PCB assemblies. 2-1: PG SHIFTER CAUTION Playback the alignment tape. When you exchange IC and Transistor for a heat sink, Press and hold the Tracking-Auto button on the remote apply the silicon grease on the contact section of the heat control more than 2 seconds to set tracking to center.
  • Page 32 ELECTRICAL ADJUSTMENTS 2-3: RF AGC 2-8: VERTICAL SIZE Place the set with Aging Test for more than 15 minutes. NOTE: Adjust after performing adjustments in section 2-7. Receive the UHF (63dB). Receive the monoscope pattern from the Pattern Connect the digital voltmeter between the pin 5 of Generator.
  • Page 33 ELECTRICAL ADJUSTMENTS 2-12: WHITE BALANCE 2-16: COLOR CENT NOTE: Adjust after performing CUT OFF adjustment. Receive the PAL color bar pattern. (RF Input) Using the remote control, set the brightness, contrast Place the set with Aging Test for more than 15 minutes. and color to normal position.
  • Page 34: Purity And Convergence

    ELECTRICAL ADJUSTMENTS 3. PURITY AND CONVERGENCE 3-3: STATIC CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 3-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator.
  • Page 35: Power

    ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CD852 CRT PCB R810 TP803 S801 J801 CP852B CP801 J4201 TP4201 VR401 VR402 FB401 CP402 CD401 CD853 CD851 CP852A POWER PCB CD302 CP302 SPEAKER A/C HEAD TP4001 L502 L503 T501 D510_1 TP4002 TP501...
  • Page 36: Power

    MECHANICAL EXPLODED VIEW PCB110 (CRT PCB) PCB340 (POWER SW PCB) I1-1...
  • Page 37 MECHANICAL EXPLODED VIEW PCB020 (POWER PCB) PCB010 (SYSCON PCB) I1-2...
  • Page 38: Chassis Exploded Views

    CHASSIS EXPLODED VIEW (TOP VIEW) CD1501 M2003 UN4001 H5002 H5001 CD1502 M101 NOTE: Applying positions AA for the grease are CLASS MARK displayed for this section. GREASE Check if the correct grease is applied for each position. I2-1...
  • Page 39 CHASSIS EXPLODED VIEW (BOTTOM VIEW) CD1501 M2001 CD1502 NOTE: Applying positions AA for the grease are CLASS MARK displayed for this section. GREASE Check if the correct grease is applied for each position. I2-2...
  • Page 40: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description BZ310427 A5A575I720K CABINET,FRONT ASSY BZ710466 752WSA0230 SHIELD,CASE HEAD AMP BZ710479 752WSA0238 SHIELD,CASE BZ710494 752WSA0245 PLATE,SHIELD BOTTOM BZ710235 753WSA0120 PLATE,BOTTOM-EARTH BZ710495 753WSA0142 PLATE,EARTH-SYSCON BZ710331 753WUAA006 SPRING,EARTH HEAD AMP BZ710496 761WPA0234 HOLDER,DECK BZ710497 85OP700037...
  • Page 41: Chassis Replacement Parts List

    CHASSIS REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description BZ610284 A5A513I420A DECK ASSY A5A513I420A BZ710564 85OA400234 PINCH ROLLER BLOCK BZ710514 85OP900746 BRACKET,TOP 3V BZ710193 85OP200290 BELT,CAPSTAN (S) BZ710515 85OP600581 WORM BZ710094 85OP500083 BASE,AC HEAD BZ710112 85OP800324 SPRING,AC HEAD BZ710516 85OA000459 MAIN CHASSIS ASS'Y...
  • Page 42: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS ! R356 BZ210111 R3X28B3R3J R,METAL 3.3 OHM 3W ! R402 BZ210210 R3X28A1R2J R,METAL OXIDE 1.2 OHM 2W ! R430 BZ210211 R3X28B221J R,METAL 220 OHM 3W ! R447 BZ210021 R65582680J R,FUSE OHM 1/2W...
  • Page 43 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description DIODES D603 BZ410043 D2WT011E10 DIODE,SILICON 11E1-EIC D606 BZ410058 D97U08R21B DIODE,ZENER MTZJ8.2B T-77 D607 BZ410058 D97U08R21B DIODE,ZENER MTZJ8.2B T-77 D608 BZ410058 D97U08R21B DIODE,ZENER MTZJ8.2B T-77 D609 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 D610 BZ410006 D1VT001330...
  • Page 44 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description TRANSISTORS Q4202 BZ510001 T6YJ1037K0 TRANSISTOR,SILICON 2SA1037AKT146R,S Q4205 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S Q4207 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S Q4210 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S COILS &TRANSFORMERS L401 BZ310004 021679472K COIL 4.7 MH L402...
  • Page 45 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description MISCELLANEOUS B2201 BZ310121 024HT03553 CORE,BEADS W5RH3.5X5X1.0 B2202 BZ310121 024HT03553 CORE,BEADS W5RH3.5X5X1.0 B2203 BZ310121 024HT03553 CORE,BEADS W5RH3.5X5X1.0 B2204 BZ310200 024H003553 CORE,BEADS W5RH3.5*5*1.0 BZ310121 024HT03553 CORE,BEADS W5RH3.5X5X1.0 B4001 BZ310121 024HT03553 CORE,BEADS W5RH3.5X5X1.0 B4201 BZ310129...
  • Page 46 ELECTRICAL REPLACEMENT PARTS LIST RESISTOR RC....CARBON RESISTOR CAPACITORS CC....CERAMIC CAPACITOR CE....ALUMI ELECTROLYTIC CAPACITOR CP....POLYESTER CAPACITOR CPP....POLYPROPYLENE CAPACITOR CPL....PLASTIC CAPACITOR CMP....... METAL POLYESTER CAPACITOR CMPL....METAL PLASTIC CAPACITOR CMPP....METAL POLYPROPYLENE CAPACITOR J3-5...
  • Page 47 TOSHIBA VIDEO PRODUCTS PTE. LTD. 438B ALEXANDRA ROAD, BLOCK B #06-01 ALEXANDRA TECHNOPARK SINGAPORE 119968...

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