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Toshiba MV20FM3 Service Manual

Color television/video cassette recorder
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FILE NO. 140-200208
SERVICE MANUAL
COLOR TELEVISION/
VIDEO CASSETTE RECORDER
MV20FM3
Complemento na página 77

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Summary of Contents for Toshiba MV20FM3

  • Page 1 FILE NO. 140-200208 SERVICE MANUAL COLOR TELEVISION/ VIDEO CASSETTE RECORDER MV20FM3 Complemento na página 77...

  • 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: Tape Removal Method At No Power Supply

    TAPE REMOVAL METHOD AT NO POWER SUPPLY Remove the VCR block from the main unit. (Refer to item 1 of the DISASSEMBLY INSTRUCTIONS.) Remove the screw 1 of the Deck Chassis and remove the Loading Motor. Rotate the Pinch Roller Cam in the direction of the arrow by hand to slacken the Video Tape. Rotate the Clutch Ass'y either of the derections to wind the Video Tape in the Cassette Case.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS SERVICING NOTICES ON CHECKING ..................A1-1 HOW TO ORDER PARTS ......................A1-1 TAPE REMOVAL METHOD AT NO POWER SUPPLY ............A1-2 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.

  • Page 5: General Specifications

    GENERAL SPECIFICATIONS CRT Size / Visual Size 20 inch / 508.0 mmV System CRT Type Flat Deflection degree Magnetic Field BV/BH + 0.45 G / 0.18 G Color System NTSC Speaker 2 Speaker Position Front Size 3 Inch Impedance Sound Output 1.5W + 1.5W 10%(Typical) 1.5W + 1.5W...
  • Page 6 GENERAL SPECIFICATIONS Regulation Safety Radiation X-Radiation DHHS Temperature Operation +5oC ~ +40oC Storage -20oC ~ +60oC Operating Humidity Less then 80% RH On Screen Menu Display Menu Type Character Timer Rec Set Channel Setup TV/CATV Auto CH Memory Add/ Delete Guide CH Set TV Setup V-chip Set...
  • Page 7 GENERAL SPECIFICATIONS G-12 Remote Unit RC-DQ Control Glow in Dark Remocon Format Custom Code 40-BFh,44-BBh Power Source Voltage(D.C) UM size x pcs UM-4 x 2 pcs Total Keys Keys Keys Power CH Up CH Down Volume Up Volume Down Input Select Play F.Fwd Pause/Still...
  • Page 8 GENERAL SPECIFICATIONS G-13 Features Auto Head Cleaning Auto Tracking HQ (VHS Standard High Quality) Auto Power On, Auto Play, Auto Rewind, Auto Eject VIDEO PLUS+(SHOWVIEW,G-CODE) Auto Clock Forward / Reverse Picture Search Reverse Slow One Touch Playback Auto CH Memory Closed Caption TV Auto Shut off Function End Call...
  • Page 9 GENERAL SPECIFICATIONS G-15 Interface Switch Power Play Pause/Still System Select One Touch Playback Channel Up Channel Down F.FWD/Cue Eject/Stop Main Power SW Volume Up Volume Down Rew/Rev Rec/OTR Input Select Indicator Power Rec/OTR T-Rec On Timer Key Light up Rec/OTR One Touch Playback Play Terminals...

  • Page 10: 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) (CP401, CP502, CP2201 and CP4202). Unlock the support 2. Remove the 6 screws 1.
  • Page 11 DISASSEMBLY INSTRUCTIONS 1-5: DECK SHIELD PLATE AND BOTTOM SHIELD 1-7: JACK PLATE AND SYSCON PCB (Refer to Fig. 1-7) (Refer to Fig. 1-5) Remove the screw 1. Remove the 2 screws 1. Remove the Syscon PCB in the direction of arrow (A). Remove the 2 screws 2.

  • Page 12: 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 13 DISASSEMBLY INSTRUCTIONS 2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A) Tension Arm Ass'y Remove the screw 1. Remove the Loading Motor. Remove the Worm. Fig. 2-7-A Loading Motor Worm Tension Connect Tension Band Main Chassis Tension Spring Tension Arm Ass'y Tension Holder •...
  • Page 14 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 15 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 16 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 17 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 18: 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 19: 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 20 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 21: 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 22 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 23: 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 simultaneously.

  • Page 24: 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 25 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 26: 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 5 seconds before Power On.

  • Page 27: Servicing Fixtures And Tools

    SERVICING FIXTURES AND TOOLS Alignment Tape Back tension cassette gauge Torque cassette gauge Taper nut driver (KT-300NR) ST-N5 ST-NF 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 28: 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 29 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 30 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 31 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 32: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS BEFORE MAKING ELECTRICAL 2. BASIC ADJUSTMENTS ADJUSTMENTS (VCR SECTION) Read and perform these adjustments when repairing the 2-1: PG SHIFTER circuits or replacing electrical parts or PCB assemblies. Connect CH-1 on the oscilloscope to TP1002 and CH-2 CAUTION to TP4201.
  • Page 33 ELECTRICAL ADJUSTMENTS 2-3: RF AGC 2-6: CUT OFF Receive the VHF HIGH (63dB). Adjust the unit to the following settings. Connect the digital voltmeter between the pin 5 of R CUT OFF=128, G CUT OFF=128, B CUT OFF=128, CP602 and the pin 1 (GND) of CP602. R DRIVE=64, B DRIVE=64, BRIGHTNESS=100, Activate the adjustment mode display of Fig.
  • Page 34 ELECTRICAL ADJUSTMENTS 2-11: VERTICAL SIZE Receive the monoscope pattern. Using the remote control, set the brightness and contrast to normal position. Activate the adjustment mode display of Fig. 1-1 and press the channel button (06) on the remote control to "A"...
  • Page 35 ELECTRICAL ADJUSTMENTS 2-18: SUB SHARPNESS Activate the adjustment mode display of Fig. 1-1 and press the channel button (17) on the remote control to select "SHARPNESS". Check if the step No. of SHARPNESS is "38". Press the INPUT SELECT button on the remote control to set to the AV mode.
  • Page 36 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 37: Y/C/Audio/Ccd/Head Amp

    WAVEFORMS Y/C/AUDIO/CCD/HEAD AMP MICON POWER ON 12 PB 0.5V 10ms/div 1.0V 0.5ms/div 0.5V 20µs/div HI-FI POWER ON 22 200mV 1ms/div POWER ON 1.0V 10µs/div 100mV 0.1µs/div 23 200mV 1ms/div 10mV 20us/div 1.0V 10ms/div TV POWER 24 REC/PB 0.5V 1ms/div 5V 0.1ms/div 1.0V 5ms/div DEFLECTION 11 PB...
  • Page 38 WAVEFORMS 26 5V 20µs/div 31 20.0V 20µs/div CHROMA/IF 27 1V 10ms/div 100mV 20µs/div 28 0.5V 5ms/div 200mV 20µs/div 29 20.0V 20µs/div 30 20.0V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 39 MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L503 V801 SP352 FB401 PCB070 (MAIN PCB) SP351 PCB030 (OPERATION PCB) I1-1...
  • Page 40 MECHANICAL EXPLODED VIEW PCB300 (COMB PCB) TU601 PCB010 (SYSCON PCB) I1-2...
  • Page 41 CHASSIS EXPLODED VIEW (TOP VIEW) M2003 UN4001 H5002 H5001 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 42 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 43 MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description BZ310342 A5B4010720 CABINET,FRONT ASSY BZ710248 752WSAA028 SHIELD,BOTTOM BZ710466 752WSA0230 SHIELD,CASE HEAD AMP BZ710497 85OP700037 HOLDER,LED BZ710631 761WPAA055 HOLDER,DECK BZ710610 753WSA0144 PLATE,BOTTOM-EARTH BZ710632 771WPA0272 PLATE,JACK BZ710508 755WPA0026 PLATE,COVER LIGHT BZ710252 800WFA0038 CUSHION 10x10xT=2...
  • Page 44 CHASSIS REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description BZ610339 A5B401Z420A DECK ASSY A5B401Z420A 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 45 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS ! R401 BZ210228 R3X28A101J R,METAL OXIDE 100 OHM 2W ! R402 BZ210229 R3X28A151J R,METAL OXIDE 150 OHM 2W R408 BZ210239 R00202681J 680 OHM 1/2W ! R418 BZ210150 R002T2010J OHM 1/2W ! R442 BZ210114...
  • Page 46 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description DIODES D533 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 D601 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 D602 BZ410053 D97U08R21C DIODE,ZENER MTZJ8.2C T-77 D603 BZ410084 D97U01101B DIODE,ZENER MTZJ11B T-77 D604 BZ410008 D23U1003A3 DIODE,SCHOTTKY SB10-03A3 D605 BZ410025 D28T11ESN1 DIODE,SILICON...
  • Page 47 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description TRANSISTORS Q811 BZ510080 TCYT1740S0 TRANSISTOR,SILICON 2SC1740SP TP Q812 BZ510080 TCYT1740S0 TRANSISTOR,SILICON 2SC1740SP TP Q901 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S Q902 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S Q903 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S Q1002 BZ410097...
  • Page 48 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description JACKS J801 BZ614115 066C130017 SOCKET,CATHODE RAY TUBE CVT3275-5101 J4201 BZ614203 060Q431018 RCA JACK AV3-19DS-1 J4202 BZ614204 060Q411015 RCA JACK AV3-19D-1 SWITCHES SW751 BZ612010 0504101T34 SWITCH,TACT EVQ21505R SW791 BZ612010 0504101T34 SWITCH,TACT EVQ21505R BZ612001...
  • Page 49 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description MISCELLANEOUS CP820B BZ614304 067U013029 WIRE HOLDER B2013H02-13P CUS011 BZ710279 800WFAA006 CUSHION A CUS012 BZ710148 800WFAA007 CUSHION B CUS013 BZ710149 800WFAA008 CUSHION C EL001 BZ614043 124116281A EYE LET XRY16X28BD EL002 BZ614044 124120301A EYE LET...
  • Page 50 FILE NO. 140-200208 SERVICE MANUAL COLOR TELEVISION/ VIDEO CASSETTE RECORDER MV20FM3...
  • Page 51 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB CP803B CP802_1 S801 J801 TP804 MAIN PCB TP806 S803 CP805 CP810A_1 CP820A VR502 TO BRIDED FB401_1 CP403 WIRE GND VR402 TP501_1 VR401 T501_1 CP401 AC IN S501 S502 CP502 L501 CP820B...
  • Page 52 TV BLOCK DIAGRAM MICON/ V. OUTPUT IC401 LA78040 OPERATION/ THERMAL IN/OUT PROTECTION Q602, Q603 AT+5V UNGER+8V Q651 MICON/ OPERATION/ PUMP H-CONTROL Q608 IN/OUT P.CON+8V HI-FI TU1_AUDIO_A AT+13V Q605, Q606 Q405 Q406 Y/C/AUDIO/CCD/ P.CON+5V TU1_VIDEO H-DRIVE H. OUTPUT HEAD AMP/ CHROMA IC601 M61206FP FB401 TU601...
  • Page 53 Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM X4001 3.579545MHz HF COM HI-FI Q4012 Q4010 HI-FI BUFFER Y/C/A/CCD/H.AMP IC BUFFER IC4001 LA71205M-MPB MICON/ FRONT_VIDEO_IN OPERATION/ REAR_VIDEO_IN IN/OUT VX01 CP4001 9 HF1(R) CLAMP HF COM HF2(L) 3.58M SP-CH1 (R) BPF2 5 SP_COM SP-CH2 (L) CLAMP AUTO-BIAS Main VCR_A_MUTE...
  • Page 54 MICON/OPERATION/IN/OUT BLOCK DIAGRAM TIMER SYSCON MICON IC SW1001 IC1001 OEC7071A SYSTEM RESET IC RESET-L 1 OUT IC1002 TAB SW R3111N311A/C AT+5.6V POWER_FAIL_L HI-FI MSSEN-A P. CON+5V J4201 X-OUT(12MHz) Q1008 MS_SEN A X1001 REAR_VIDEO_IN_R Q1009 J701 BUFFER X-IN(12MHz) 12MHz REAR_AUDIO_IN_L Y/C/AUDIO/ XC-OUT(32KHz) MSSEN-B FRONT_VIDEO_IN...
  • Page 55 HI-FI BLOCK DIAGRAM FRONT_AUDIO_IN_R HI-FI AUDIO/HEAD AMP/DEM IC FRONT_AUDIO_IN_L IC5501 AUDIO_OUT_L AN3662FBP MICON/ OPERATION/ AUDIO_OUT_R IN/OUT REAR_AUDIO_IN_R INPUT SW REAR_AUDIO_IN_L AUDIO_OUT_R Y/C/AUDIO/CCD/ HF_COM OUTPUT HEAD AMP AUDIO_OUT_L Y/C_AUDIO TU1_AUDIO_A NORMAL_A FM LIM VCO-FO V. REC_ST_H LOGIC BLOCK HIFI_ENV. P.CON+5V HIFI_H.SW MICON/ VCR_A_MUTE OPERATION/...

  • Page 56: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE CD402 D515 CP810A_1 R490 W854 D533 R423 R514 D507 W019 IC506 VR502 IC501 C432 R442 W006 D412 CP820A W036 R553 Q404 Q403 C433 D528 W018 W005 D504 D517 W016 D409 R507 R453 D526 C542 Q507...
  • Page 57 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE C807 R515 R810 R809 R821 R412 R431 R516 C528...

  • Page 58: Syscon/Comb

    PRINTED CIRCUIT BOARDS SYSCON/COMB (INSERTED PARTS) SOLDER SIDE CD604 CP2201_2 R668 IC602 IC603 S807Y W270 HS603_1 HS602_1 D2201 W996 S807X W082 CP601 C643 R669 W009 D4201 C612 C684 C741 W081 W990 Q605 Q602 S811X W080 W076 C610 W078 R693 Q603 W075 W072 W006...
  • Page 59 PRINTED CIRCUIT BOARDS SYSCON/COMB (CHIP MOUNTED PARTS) SOLDER SIDE C4218 Q901 C4204 IC901 C906 R909 Q903 R908 R914 C919 C908 Q902 R913 R906 C5535 Q5501 W404 R5506 Q350 C4222 C5559 R5505 R5502 C5515 C5513 W818 R5508 W961 R5518 R311 C5522 R5520 C308 R307...

  • Page 60: Operation

    PRINTED CIRCUIT BOARDS OPERATION SOLDER SIDE W806 SW751_1 W804 R352 W015 SW796 SW794 SW791 SW792 SW793 SW795 SW797 SW799 C779 C352 D793 W813 J351 OS753 W809 C781 W009 R775 R778 R777 R776 W018 CD355 CD356 J701_1 CD757_2 R754 D791 R793 R766 W011 W006...

  • Page 61: Y/C/Audio/Ccd/Head Amp

    Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) BUFFER Q4012 R4041 2SC2412K 1.8K FROM/TO IN/OUT FROM POWER FRONT_V_IN P.CON+5V REAR_V_IN (S801) VIDEO_OUT W988 FROM/TO HI-FI C4058 TU2_AUDIO NORMAL_A C4059 6.3V Y/C_AUDIO R4038 0.1 B C4061 680K 0.01 B FROM/TO MICON Y/C/A/CCD/HEAD AMP HF_COM Y/C_CLK IC4001...

  • Page 62: Micon

    MICON SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO HI-FI FROM/TO POWER W874 V.REC_ST_H AT+5V[BACKUP] R1004 HIFI_ENV HIFI_H.SW AT+5V[UCON] C1056 0.1 B ST_SELECT P.CON+5V W871 VCR_A_MUTE W823 AT+12V C1065 W860 0.1 B C1009 D1001 BUFFER MOTOR_GND POWER_FAIL Q1008 220P CH C1034 SERVICE 2SA1037AK C1067 STANDBY-H MTZJ11B...

  • Page 63: Power

    POWER SCHEMATIC DIAGRAM (SYSCON PCB) TO Y/C/AUDIO/HEAD AMP P.CON+5V 12.6 REG. Q608 FROM/TO TV POWER 2SC13840W CP601 (CD404) REG. 003P-2100 Q606 2SC13840W REG. TO MICON Q605 2SC13840W AT+12V REG. R690 MOTOR_GND Q603 AT+5V[UCON] KTC3203_Y 1K 1/2W D604 AT+5V[BACKUP] SB10-03A3 REG. R682 R686 P.CON+5V...

  • Page 64: In/Out

    IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO SOUND AMP W908 SP_OUT_R SOUND_R+ SP_OUT_L SOUND_L+ C4201 SOUND_GND C4203 0.001 B 0.01 B C4205 0.01 B S807X FRONT_A_IN_R FRONT_A_IN_L REC LED SW W828 FRONT_V_IN Q4205 KRC102SRTK (W239) REC_LED T-REC LED SW Q4206 KRC102SRTK FROM POWER AT+5V[UCON] P.CON+9V...

  • Page 65: Chroma/If

    CHROMA/IF SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO MICON DEGAUSS_H POWER_FAIL OSD_R OSD_G OSD_B OSD_BLK L620 L618 R616 C676 TO Y/C/AUDIO/HEAD AMP L610_2 47uH 33uH 150P CH TU1_AUDIO AFT_M TU1_VIDEO VCR_POWER_H 100uH R620 FROM/TO DIGITAL COMB FILTER X_RAY_TEST CF604 PROTECT BUFFER 6.8K EFCT4R5MW5 C648 CP604...

  • Page 66: Sound Amp

    SOUND AMP SCHEMATIC DIAGRAM (SYSCON PCB) SOUND AMP IC IC352 AN7522 R357 100K 1/4W HS352 763WAA0160 FROM/TO IN/OUT SOUND_R+ FROM CHROMA/IF W951 SP_OUT_L B301 SOUND+B SOUND_L+ W5RH3.5X5X1.0 C321_1 W952 1000 SP_OUT_R SOUND_GND SOUND_GND FROM/TO MICON R353 TV_POWER_H R359 1/4W TV_A_MUTE 47K 1/4W MUTE SW Q350...
  • Page 67 HI-FI SCHEMATIC DIAGRAM (SYSCON PCB) C5521 R5518 0.22 B 3.3K C5514 0.1 F FROM/TO IN/OUT C5561 AUDIO_OUT_L 100P AUDIO_OUT_R C5560 FRONT_A_IN_L 100P FRONT_A_IN_R REAR_A_IN_L REAR_A_IN_R R5512 2.7M C5506 0.1 F C5540 0.015 B DEM_BLK C5508 ZZ-PROM PILOT LOGIC C5507 0.1 F C5541 0.22 B 0.1 F INPUT...
  • Page 68 IF SCHEMATIC DIAGRAM (SYSCON PCB) TO CHROMA/IF MONITOR_V TO MICON AFT_R FROM Y/C/AUDIO/HEAD AMP VIDEO_OUT VIDEO_OUT TO IN/OUT VIDEO_OUT FROM/TO POWER S811Y AFT_R PCB010 NOTE: THE DC VOLTAGE AT EACH PART WAS NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME TUNER VIDEO SIGNAL VMA245 MEASURED WITH THE DIGITAL TESTER...
  • Page 69 DIGITAL COMB FILTER SCHEMATIC DIAGRAM (COMB PCB) C903 L901 0.47 C907 820uH 6.3V C906 0.01 B C923 150P CH C914_1 R905 BUFFER Q901 2SC2412K C913 FROM/TO CHROMA/IF 0.01 B CY901 (CP604) IMSA-9130S-06L MONITOR V.OUT Y IN C IN L902 150uH P.CON+5V C916 C921...
  • Page 70 TV POWER SCHEMATIC DIAGRAM (MAIN PCB) DEGAUSS_H FROM/TO DEFLECTION W810 222.6 PROTECT RELAY DRIVE PROTECT DRIVE D516 Q504 Q502 111.8 C510 KTC3198-AT(Y,GR) 2SA1624 SOUND+B 1SS133 DEGAUSS_H 100V R506 AT+13V POWER_FAIL 22K 1/4W C502 0.1 B VCR.POWER_H RY501 ALKS321 R502 SOUND_GND D505 TP501_1 0.56 2W...
  • Page 71 DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC FROM/TO POWER IC401 LA78040 THERMAL PROTECTION CD402 (CD302) CH01004A PUMP UP FROM/TO CHROMA/IF 25.5 12.9 24.8 CP403 003P-2100 TO DY D407 D402 CP401 A1561WV2-A5P MTZJ30B MTZJ30B L402 R408 R413 R416 ELH5L4113 R412 1/2W 1.2K 39K +-1% 12K +-1%...
  • Page 72 CRT SCHEMATIC DIAGRAM (CRT PCB) CRT PCB TP804 RED AMP Q810 2SC1740SP TP W853 R828 2.7K 1/4W RED AMP Q801 KTC4217(O,Y) 121.6 R813 D801 1SS133 R810 1.8K TP805 116.7 GREEN AMP 148.3 Q811 W849 2SC1740SP TP 148.3 R829 144.5 2.7K 1/4W GREEN AMP Q802 FROM CHROMA/IF...

  • Page 73: Operation

    OPERATION SCHEMATIC DIAGRAM (OPERATION PCB) R754 270 1/4W FROM/TO IN/OUT R778 R771 R772 R773 R774 CD757_2 (CP2201_2) 1/4W 1K 1/4W 1.5K 1/4W 2.7K 1/4W 5.6K 1/4W CU2A2501 REMOCON_OUT AT+5V Vout KEY_A T-REC_LED R775 OS753 R776 R777 REC_LED PIC-28143TC5 KEY_B 820 1/4W 1K 1/4W 1.5K 1/4W FROM/TO IN/OUT...
  • Page 74 INTERCONNECTION DIAGRAM HALL MAIN ROTOR CD757_2 CP2201_2 REMOCON_OUT SENSOR COIL MAGNET FG SENSOR FRONT AV JACK AT+5V J701_1 KEY_A FRONT_VIDEO_IN T-REC_LED REC_LED FRONT_AUDIO_IN_L HALL HALL SWITCH KEY_B LOGIC FRONT_A_IN_R CP1001 FRONT_AUDIO_IN_L CAP_FG CD702 CP4202 FRONT_VIDEO_IN CAP_VCO HEADPHONE JACK FRONT_AUDIO_IN CAP/M/F/R J351 SOUND_GND I LIMIT...
  • Page 75 TOSHIBA VIDEO PRODUCTS PTE. LTD. 438B ALEXANDRA ROAD, BLOCK B #06-01 ALEXANDRA TECHNOPARK SINGAPORE 119968...
  • Page 76 TOSHIBA VIDEO PRODUCTS PTE. LTD. 438B ALEXANDRA ROAD, BLOCK B #06-01 ALEXANDRA TECHNOPARK SINGAPORE 119968...
  • Page 77 Please refer to this Supplement in conjunction with the original Service Manual when servicing this model. MV20FM3 comes with 2 versions of SYSCON PCB. The version can be identified by the alphabet behind the serial no. Eg. 85584001 B. When replacing components use only the components in the respective list (version A or B).
  • Page 78 Change of SYSCON PCB and COMB PCB ELECTRICALREPLACEMENT PARTS LIST MFR'S VERSION A MFR'S VERSION B REF. NO. PART NO. DESCRIPTION TSB P/N PART NO. DESCRIPTION TSB P/N R627 R801R7682J RC 6.8K OHM 1/10W AD301727 R653 R801R7103J RC 10K OHM 1/10W AD301728 R693 R00204103J...
  • Page 79 PRINTED CIRCUIT BOARDS SYSCON/COMB(INSERTED PARTS) SOLDER SIDE (MFR'S VERSION B) CP2201_2 IC602 R668 IC603 W270 CP601 HS603_1 HS602_1 W996 Q1002 R669 W082 W009 D4201 W081 W990 Q605 W079 Q602 W080 W078 TU601 W076 Q603 W075 Q606 W006 W072 W860 W168 W068 W004 W246...
  • Page 80 PRINTED CIRCUIT BOARDS SYSCON/COMB(CHIP MOUNTED PARTS) SOLDER SIDE (MFR'S VERSION B) C904 W952 C4218 Q901 C4204 IC901 C906 R909 Q903 R908 R914 C919 C908 Q902 R913 R906 C5535 Q5501 W404 R5506 Q350 C4222 C5559 R5505 R5502 C5515 C5513 W818 W961 R5508 R5518 R311...
  • Page 81 CHROMA/IF SCHEMATIC DIAGRAM (SYSCON PCB) (MFR’S VERSION B) FROM/TO MICON HD {2} VD {2} DEGAUSS_H {2} POWER_FAIL {2} OSD_R {2} OSD_G {2} OSD_B {2} TO Y/C/AUDIO/HEAD AMP OSD_BLK {2} R616 L620 L618 C676 L610 SDA {2} SCL {2} 47uH 33uH 150P CH TU1_AUDIO 100uH...
  • Page 82 TOSHIBA VIDEO PRODUCTS PTE. LTD. 438B ALEXANDRA ROAD, BLOCK B #06-01 ALEXANDRA TECHNOPARK SINGAPORE 119968...

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