Toshiba MV14FM4 Service Manual
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Toshiba MV14FM4 Service Manual

Color television/ video cassette recorder
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FILE NO. 140-200214
SERVICE MANUAL
COLOR TELEVISION/
VIDEO CASSETTE RECORDER
MV14FM4

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Summary of Contents for Toshiba MV14FM4

  • Page 1 FILE NO. 140-200214 SERVICE MANUAL COLOR TELEVISION/ VIDEO CASSETTE RECORDER MV14FM4...

  • 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 14 inch / 357.0 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 1.5 x 2.5 Inch Impedance Sound Output 1.5W + 1.5W...
  • Page 6 GENERAL SPECIFICATIONS 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 On/Off Timer Set Picture Audio Sap On/Off Auto Repeat On/Off System Setup Clock Set Yes (Calendar 12h) Language Auto Clock On/Off...
  • 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) AND P.C. BOARDS Remove the 2 screws 1. Disconnect the following connectors: 1-1: BACK CABINET (Refer to Fig. 1-1) (CP401, CP502, CP2201 and CP4202). Remove the 4 screws 1. Unlock the support 2.
  • Page 11 DISASSEMBLY INSTRUCTIONS 1-5: DECK SHIELD PLATE AND BOTTOM PLATE 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) 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 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 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CD803 CRT PCB CP803B CP802_1 S801 J801 TP804 MAIN PCB TP806 CP805 CP810A_1 CP820A VR502 FB401_1 CP403 VR402 TP501_1 VR401 T501_1 CP401 AC IN S501 S502 CP502 L501 CD820 SYSCON PCB TP4201 CP602 CD805...
  • Page 38 MECHANICAL EXPLODED VIEW PCB110 (CRT PCB) PCB070 (MAIN PCB) PCB030 (OPERATION PCB) I1-1...
  • Page 39 MECHANICAL EXPLODED VIEW PCB010 (SYSCON PCB) I1-2...
  • Page 40 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 41 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 42 MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description BZ310364 A5C601J720 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 43 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 44 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 ! R418 BZ210150 R002T2010J OHM 1/2W ! R442 BZ210114 R4X5T6123F R,METAL 12K OHM 1/6W ! R443...
  • Page 45 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description DIODES D526 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 D528 BZ410021 D97U05R61B DIODE,ZENER MTZJ5.6B T-77 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...
  • Page 46 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description TRANSISTORS Q1003 BZ410106 0002700680 PHOTO COUPLER RPI-352C40N Q1004 BZ510067 TNAAC05002 COMPOUND TRANSISTOR KRC103SRTK Q1005 BZ410107 0002700690 PHOTO COUPLER RPI-303 Q1006 BZ510067 TNAAC05002 COMPOUND TRANSISTOR KRC103SRTK Q1007 BZ510067 TNAAC05002 COMPOUND TRANSISTOR KRC103SRTK Q1008 BZ510001...
  • Page 47 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description SWITCHES SW799 BZ612010 0504101T34 SWITCH,TACT EVQ21505R SW1001 BZ612014 0508A11002 SWITCH(LEAF) MXS01380MPP0 VARIABLE RESISTORS VR401 BZ210237 V1K63Q4BTE VOLUME,SEMI FIXED NVG6TLTAB473 VR402 BZ210238 V1K6313BTE VOLUME,SEMI FIXED NVG6TLTAB102 VR502 BZ210238 V1K6313BTE VOLUME,SEMI FIXED NVG6TLTAB102 P.C.BOARD ASSEMBLIES PCB010...
  • Page 48 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description MISCELLANEOUS TU601 BZ310341 0145K00056 TUNER,VHF-UHF TECC1040PG32E ! V801 BZ614395 098Q150402 CRT W/DY A36AKJ13X02 X602 BZ613004 100CT3R505 CRYSTAL HC-49/C X1001 BZ613002 100CT01207 CRYSTAL HC-49/U-S X1002 BZ613006 100DA32R01 CRYSTAL DT-26 X4001 BZ613017 100CT3R502 CRYSTAL...
  • Page 49 TOSHIBA VIDEO PRODUCTS PTE. LTD. 438B ALEXANDRA ROAD, BLOCK B #06-01 ALEXANDRA TECHNOPARK SINGAPORE 119968...
  • Page 50 FILE NO. 140-200214 SERVICE MANUAL COLOR TELEVISION/ VIDEO CASSETTE RECORDER MV14FM4...

  • Page 51: Y/C/Audio/Ccd/Head Amp

    TV BLOCK DIAGRAM MICON/ V. OUTPUT IC401 AN5522 OPERATION/ THERMAL IN/OUT PROTECTION Q602, Q603 UNGER+8V AT+5V 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 FB401 TU601 IC601 M61206FP...
  • Page 52 Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM X4001 3.579545MHz HI-FI HF COM 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 53 MICON/OPERATION/IN/OUT BLOCK DIAGRAM TIMER SYSCON MICON IC IC1001 OEC7071A SW1001 SYSTEM RESET IC RESET-L 1 OUT TAB SW IC1002 R3111N311A/C-TR 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 Y/C/AUDIO/ REAR_AUDIO_IN_L XC-OUT(32KHz) CCD/HEAD AMP MSSEN-B...
  • Page 54 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 MICON/ HIFI_H.SW OPERATION/ IN/OUT...

  • Page 55: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE CD402 D515 S807X CP810A_1 R490 W854 R423 D507 W019 R514 IC506 VR502 C432 R442 W006 D412 CP820A W036 R553 IC501 C433 W018 W005 D504 D517 W016 D409 R507 R453 D526 C542 Q507 D512 W014 W001...
  • Page 56 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE C807 R515 R810 R809 R821 R412 R431 R516 C528...

  • Page 57: Syscon

    PRINTED CIRCUIT BOARDS SYSCON (INSERTED PARTS) SOLDER SIDE CD604 CP2201_2 R668 IC602 IC603 S807Y S807X HS603_1 W996 HS602_1 W082 C643 R669 W009 C612 D4201 W081 Q608 C684 Q605 W990 S811X W080 Q602 W078 C610 W076 W075 Q603 W006 Q606 W072 TU601 W860 W168...
  • Page 58 PRINTED CIRCUIT BOARDS SYSCON (CHIP MOUNTED PARTS) SOLDER SIDE C4218 C4204 C5535 Q5501 W404 R5506 Q350 C4222 C5559 R5505 R5502 C5515 C5513 W818 W961 R5508 R5518 R311 C5522 R5520 C308 R307 R302 C5560 R306 C302 C5561 R5521 R5510 R5517 S102Y Q651 C5546 C5544...

  • Page 59: Operation

    PRINTED CIRCUIT BOARDS OPERATION SOLDER SIDE W806 W015 SW794 SW791 SW792 SW793 SW795 SW799 SW798 R352 SW751 SW797 SW796 C779 W804 W813 OS753 D793 W809 W009 R778 R777 R775 R776 W018 J351 C781 W024 CD355 CD356 J701_1 W006 R793 CD757_2 R754 W011 R766...

  • Page 60: 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 FROM/TO MICON 680K 0.01 B Y/C/AUDIO/HEAD AMP Y/C_CLK HF_COM IC4001...

  • Page 61: Micon

    MICON SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO HI-FI FROM/TO POWER W874 V.REC_ST_H R1004 HIFI_ENV AT+5V[BACKUP] HIFI_H.SW AT+5V[UCON] C1056 ST_SELECT P.CON+5V W871 VCR_A_MUTE W823 AT+12V C1065 W860 0.1 B C1009 D1001 MOTOR_GND BUFFER POWER_FAIL Q1008 220P CH C1034 SERVICE FROM/TO Y/C/AUDIO/HEAD AMP 2SA1037AK C1067 TP1001...
  • Page 62 POWER SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO DEFLECTION TO Y/C/AUDIO/HEAD AMP CP601 (CD402) 003P-2100 P.CON+5V 12.6 REG. Q608 2SC13840W REG. Q606 2SC13840W REG. TO MICON Q605 2SC13840W AT+12V REG. R690 MOTOR_GND Q603 AT+5V[UCON] KTC3203_Y-AT 1K 1/2W D604 AT+5V[BACKUP] SB140-EIC R682 R686 P.CON+5V REG.
  • Page 63 IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) W908 FROM/TO SOUND AMP C4201 C4203 SOUND_GND 0.001 0.01 B SOUND_L+ SP_OUT_L C4205 SOUND_R+ 0.01 B SP_OUT_R S807X FRONT_A_IN_R FRONT_A_IN_L (W239) REC LED SW W842 W828 Q4205 FRONT_V_IN KRC102SRTK (W205) REC_LED T-REC LED SW Q4206 KRC102SRTK FROM POWER AT+5V[UCON]...
  • Page 64 CHROMA/IF SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO MICON DEGAUSS_H POWER_FAIL OSD_R OSD_G OSD_B TO Y/C/AUDIO/HEAD AMP OSD_BLK R616 L620 L618 C676 R654 TU1_AUDIO L610_2 47uH 33uH 150P 820 1/4W AFT_M TU1_VIDEO VCR_POWER_H 100uH R620 CF604 BUFFER 6.8K EFCT4R5MW5 C648 X_RAY_TEST Q601 TO SOUND AMP PROTECT 2SA1037AK...

  • Page 65: 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 W952 SP_OUT_R SOUND_GND SOUND_GND FROM/TO MICON R353 TV_POWER_H R359 68K 1/4W TV_A_MUTE 1/4W MUTE SW Q350 2SC2412K...
  • Page 66 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 HI-FI AUDIO/HEAD AMP/DEM IC R5512 REAR_A_IN_R IC5501 2.7M AN3662FBP C5506 0.1 F C5540 0.015 B DEM_BLK C5508 ZZ-PROM PILOT...
  • Page 67 IF SCHEMATIC DIAGRAM (SYSCON PCB) TO CHROMA/IF MONITOR_V AFT_R FROM Y/C/AUDIO/HEAD AMP VIDEO_OUT TO IN/OUT VIDEO_OUT VIDEO_OUT S811Y AFT_R PCB010 VMA245 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME TUNER VIDEO SIGNAL OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE G-15 G-16...
  • Page 68 TV POWER SCHEMATIC DIAAGRAM (MAIN PCB) DEGAUSS_H 5A 125V CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, R508 REPLACE ONLY WITH THE SAME TYPE FUSE FROM/TO DEFLECTION 5A 125V(F501) RELAY DRIVE ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE PROTECT Q504 PROTECT DRIVE N’UTILISER QUE DES FUSIBLE DE MEME TYPE D516...
  • Page 69 DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC IC401 AN5522 THERMAL PROTECTION PUMP UP 25.5 12.9 24.8 FROM/TO POWER CD402 (CP601) CH01004A TO DY CP401 A1561WV2-A5P FROM/TO CHROMA/IF L402 CP403 (CD604) R413 R416 ELH5L4113 003P-2100 R412 R448 1.2K 39K +-1% 22K +-1% 1K 1W FB401_1 C450...
  • Page 70 CRT SCHEMATIC DIAGRAM (CRT PCB) TP804 RED AMP Q810 W853 2SC1740SP R828 2.7K 1/4W RED AMP Q801 121.6 2SC2621 R813 D801 116.7 1SS133 R810 148.3 1.8K 144.5 146.3 J801_1 HPS3200-010501 TP805 GREEN AMP Q811 W849 2SC1740SP R829 2.7K 1/4W GREEN AMP FROM CHROMA/IF Q802 121.6...
  • Page 71 OPERATION SCHEMATIC DIAGRAM (OPERATION PCB) R754 270 1/4W FROM/TO IN/OUT R778 R771 R772 R773 R774 CD757_2 (CD2201_2) 820 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 1/4W 1K 1/4W...
  • Page 72 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 73: Hi-Fi

    WAVEFORMS Y/C/AUDIO/CCD/HEAD AMP MICON 12 PB POWER ON 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 74 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 75 TOSHIBA VIDEO PRODUCTS PTE. LTD. 438B ALEXANDRA ROAD, BLOCK B #06-01 ALEXANDRA TECHNOPARK SINGAPORE 119968...
  • Page 76 Please refer to this Supplement in conjunction with the original Service Manual when servicing this model. MV14FM4 comes with 2 versions of SYSCON PCB. The version can be identified by the alphabet behind the serial no. (Eg. 83584001 B). When replacing components, use only the components in the respective Electrical Replacement Parts list (version A or B).
  • Page 77 SYSCON PCB VERSION UP ELECTRICAL REPLACEMENT PARTS LIST MFR'S VERSION A MFR'S VERSION B PART NO. DESCRIPTION TSB P/N PART NO. DESCRIPTION TSB P/N REF. NO. R693 R00204103J 10K OHM 1/4W C741 E02L052R2M CE 2.2 UF 50V SYSCON PCB ASS'Y SYSCON PCB ASS'Y PCB010 A5C601J010 (VERSION A) VMA245B...
  • Page 78 MICON SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO HI-FI W831 AT+5V_1 FROM/TO POWER W874 V.REC_ST_H AT+5V[BACKUP] AT+5V[BACKUP] R1004 HIFI_ENV HIFI_H.SW AT+5V[UCON] C1056 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 FROM/TO Y/C/AUDIO/HEAD AMP MTZJ11B...
  • Page 79 IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) W908 FROM/TO SOUND AMP C4201 SOUND_GND 0.01 B SOUND_L+ SP_OUT_L C4205 SOUND_R+ 0.01 B SP_OUT_R FRONT_A_IN_R S807X W828 FRONT_A_IN_L REC LED SW FRONT_V_IN Q4205 KRC102SRTK REC_LED T-REC LED SW Q4206 KRC102SRTK FROM POWER AT+5V[UCON] P.CON+9V R2211 T-REC_LED 4.7K...
  • Page 80 PRINTED CIRCUIT BOARDS SYSCON (INSERTED PARTS) SOLDER SIDE IC602 CP2201_2 R668 W270 S807X IC603 HS602_1 S807Y HS603_1 W996 CP601 C643 W082 R669 W009 W081 D4201 W990 Q605 Q602 W080 W079 TU601 W078 W076 C612 C610 W075 Q603 Q606 W006 W072 W860 W168 W004...
  • Page 81 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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