Toshiba MV20FL4C Service Manual
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Toshiba MV20FL4C Service Manual

Toshiba MV20FL4C Service Manual

Color television/video cassette recorder
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FILE NO. 140-200119
SERVICE MANUAL
COLOR TELEVISION/
VIDEO CASSETTE RECORDER
MV20FL4C

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Summary of Contents for Toshiba MV20FL4C

  • Page 1 FILE NO. 140-200119 SERVICE MANUAL COLOR TELEVISION/ VIDEO CASSETTE RECORDER MV20FL4C...

  • 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~B2-5 3.

  • Page 4: 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 5 GENERAL SPECIFICATIONS 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 On/Off Timer Set Picture Audio Sap On/Off Auto Repeat On/Off System Setup Clock Set...
  • Page 6 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 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 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 8 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 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) (CP401, CP502, CP4201 and CP4202). 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 screw 2. Remove the Syscon PCB in the direction of arrow (A). Remove the 2 screws 2.

  • Page 11: Removal Of Deck Parts

    DISASSEMBLY INSTRUCTIONS 2. REMOVAL OF DECK PARTS NOTE When you install the Tape Guide L, install as shown in the 2-1: TOP BRACKET (Refer to Fig. 2-1) circle of Fig. 2-3-B. (Refer to Fig. 2-3-B) Remove the 2 screws 1. Slide the 2 supports 2 and remove the Top Bracket.
  • Page 12 DISASSEMBLY INSTRUCTIONS 2-6: LINK UNIT (Refer to Fig. 2-6) 2-9: TENSION ASS'Y (Refer to Fig. 2-9-B) Set the Link Unit to the Eject position. Turn the Middle Gear clockwise so that the Tension Remove the (A) side of the Link Unit first, then remove Holder hook is set to the position of Fig.
  • Page 13 DISASSEMBLY INSTRUCTIONS 2-10: T BRAKE ASS'Y (Refer to Fig. 2-10) Remove the T Brake Spring. P5 Spring Turn the T Brake Ass'y clockwise and bend the hook Cassette Opener section to remove it. P5-3 Arm Ass'y T Brake Ass'y Pinch Roller Block Pinch Roller Arm Spring Pinch Roller Lever Ass'y Hook section...
  • Page 14 DISASSEMBLY INSTRUCTIONS 2-16: CAPSTAN DD UNIT (Refer to Fig. 2-16) Remove the Capstan Belt. Remove the 3 screws 1. Remove the Capstan DD Unit. Spring Position Fig. 2-13-B Capstan Belt Capstan DD Unit 2-14: FE HEAD (RECORDER ONLY) (Refer to Fig. 2-14) Remove the screw 1.
  • Page 15 DISASSEMBLY INSTRUCTIONS 2-18: CLUTCH ASS'Y (Refer to Fig. 2-18) NOTES Remove the Capstan Brake Spring. 1. When you install the Loading Arm S Ass'y, Loading Arm Remove the Polyslider Washer 1. T Ass'y and Main Loading Gear, align each marker. Remove the Clutch Ass'y, Ring Spring and Coupling (Refer to Fig.

  • Page 16: Removal Of Anode Cap

    DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to 3. REMOVAL OF ANODE CAP 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 17: 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 18 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 19: 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 20 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 21: 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 22: Preventive Checks And Service Intervals

    PREVENTIVE CHECKS AND SERVICE INTERVALS The following standard table depends on environmental conditions and usage. Unless maintenance is properly carried out, the following service intervals may be quite shortened as harmful effects may be had on other parts. Also, long term storage or misuse may cause transformation and aging of rubber parts. Time 1,000 1,500...
  • Page 23 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 24: Note For The Replacing Of Memory Ic

    NOTE FOR THE REPLACING OF 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.

  • Page 25: 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 26: Preparation For Servicing

    PREPARATION FOR SERVICING How to use the Servicing Fixture Unplug the connector CP4201 and CP4202, then remove the TV/VCR Block from the set. Unplug the connector CP810A, CP820A and CP805, then remove the Main PCB from the VCR Block. Connect as shown in the below figure using the Service Fixture. •...

  • 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 Tension Adjust until the edge of the Tension the Cassette Tape to keep it steady when you want to Arm is positioning within 0.5mm range from 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) 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 Adjust X value adjustment driver hole 2. Tension Arm P4 Post 3. Guide Roller T Brake Spring 4. P1 Post T Reel 5. Audio/Control Head S Reel D1-4...

  • 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 Connect CH-1 on the oscilloscope to TP1002 and CH-2 • Use an isolation transformer when performing any to TP4001.
  • Page 32 ELECTRICAL ADJUSTMENTS 2-3: RF AGC 2-8: WHITE BALANCE Receive the VHF HIGH (63dB). NOTE: Adjust after performing CUT OFF adjustment. Connect the digital voltmeter between the pin 5 of Place the set with Aging Test for more than 15 minutes. CP602 and the pin 1 (GND) of CP602.
  • Page 33 ELECTRICAL ADJUSTMENTS 2-13: VERTICAL SHIFT 2-17: SUB COLOR NOTE: Adjust after performing adjustments in section 2-12. Receive the color bar pattern. (RF Input) Using the remote control, set the brightness, contrast, Receive the center cross signal from the Pattern color and tint to normal position. Generator.
  • Page 34 ELECTRICAL ADJUSTMENTS 3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (VCR SECTION) TP4001 TP1002 TP1001 CP602 TU601 J4202 J4201 TP4201 SYSCON PCB D2-4...
  • Page 35 ELECTRICAL ADJUSTMENTS (TV SECTION) TP806 TP804 VR402 VR401 FB401 J801 T501 FOCUS VOLUME SCREEN VOLUME CRT PCB VR502 MAIN PCB D2-5...

  • Page 36: Purity And Convergence

    ELECTRICAL ADJUSTMENTS 4. PURITY AND CONVERGENCE 4-3: STATIC CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 4-2. 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/In/Out

    TV BLOCK DIAGRAM MICON/ V. OUTPUT IC401 AN5522 POWER/ OPERATION/ THERMAL Q610, Q611 DECK PROTECTION UNGER+8V AT+5V Q606 P.CON+8V AT+13V PUMP Q602, Q603 HIFI TU1_AUDIO_A P.CON+5V Y/C/AUDIO/ Q405 Q406 CHROMA CCD/ TU1_VIDEO IC601 M61206FP H-DRIVE H. OUTPUT HEAD AMP/ 33 39 46 63 48 IN/OUT DELAY ADJ...

  • Page 38: Hifi

    Y/C/AUDIO/CCD/HEAD AMP/IN/OUT BLOCK DIAGRAM X4001 3.579545MHz HIFI HF COM Q4012 Q4010 BUFFER BUFFER Y/C/A/CCD/H.AMP IC REAR_VIDEO_IN HIFI IC4001 LA71201M-MPB FRONT_VIDEO_IN VX01 CP4001 9 HF1(R) HF COM HF2(L) 3.58M SP-CH1 (R) BPF2 5 SP_COM SP-CH2 (L) CLAMP AUTO-BIAS Main CONV EP/LP-CH2 (R) Y/C_CLK EP/LP_COM MICON/ POWER/...
  • Page 39 MICON/POWER/OPERATION/DECK BLOCK DIAGRAM SW1001 TIMER SYSCON MICON IC V.REC_ST_H IC1001 OEC7059A SYSTEM RESET IC HIFI_ENV RESET-L 1 OUT IC1003 TAB SW R3111N311A/C VCR_A_MUTE HIFI HIFI_ENV AT+5.6V POWER_FAIL_L MSSEN-A P. CON+5V ST_SELECT X-OUT(12MHz) Q1023 MS_SEN A X1001 Q1009 12MHz X_RAY_SW X-IN(12MHz) XC-OUT(32KHz) MSSEN-B X1002...
  • Page 40 HIFI BLOCK DIAGRAM J701 HIFI AUDIO/H.AMP/DEM IC5501 AN3662FBP FRONT_VIDEO_IN J4201 Y/C/AUDIO/CCD/ HEAD AMP/IN/OUT INPUT SW REAR_VIDEO_IN Y/C/AUDIO/CCD/ OUTPUT HF_COM HEAD AMP/IN/OUT J4202 AUDIO_OUT_R AUDIO_OUT_L Y/C_AUDIO TU1_AUDIO_A NORMAL_A FM LIM VCO-FO LOGIC V. REC_ST_H BLOCK HIFI_ENV. P.CON+5V HIFI_H.SW MICON/POWER/ OPERATION/ VCR_A_MUTE P.CON+9V DECK LOGIC...

  • Page 41: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS MAIN/CRT SOLDER SIDE CP402 C405 R509 VR401 VR402 W016 Q803 CP820A Q505 C806 W011 Q512 W003 IC401 CP810A R518 D526 D530 Q509 R830 HS401 R413 R815 Q812 Q508 R508 Q503 TP805 R821 D524 W049 Q801 W024 W025 R811 2.5A125VOR250V W834...

  • Page 42: Syscon/Comb

    PRINTED CIRCUIT BOARDS SYSCON/COMB (INSERTED PARTS) SOLDER SIDE CD4206 CC4202 CP4202 CY901 Q1013 W846 W227 W226 W225 W224 S809Y S810X W221 W219 SW1001 C5510 W217 W903 IC352 HS352 S809X W215 C5512 W104 L5503 W102 W251 IC301 W101 R5507 L5501 W100 W249 W320 W099...
  • Page 43 PRINTED CIRCUIT BOARDS SYSCON/COMB (CHIP MOUNTED PARTS) SOLDER SIDE R667 C682 Q4204_1 Q609 Q4206_1 R1048 R663 Q4205_1 R4047 R662 C1077 R1075 C1002 Q1023 Q1002 Q4210 R1008 R4232 C4202 R658 R1066 C1064 Q4212 R634 R1003 R4231 C1006 R1083 Q4203 Q1004_1 W809 C4209 C1082 C622...
  • Page 44 PRINTED CIRCUIT BOARDS OPERATION SOLDER SIDE W806 W804 W813 SW796 W015 R352 SW751 SW797 D793 C779 J701_1 OS753 W809 C781 W009 R778 R777 C702 R776 R775 W018 D792 D791 CD355 CD356 CD757_2 J351 W006 R793 R754 W011 R761 R766 W805 W013 W004 CD702...
  • Page 45 Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) BUFFER Q4012 R4041 2SC2412K 1.8K FROM/TO IN/OUT FROM POWER S101X S101Y FRONT_VIDEO_IN P.CON+5V REAR_VIDEO_IN C4058 W823_1 Y/C_VIDEO VIDEO_OUT 6.3V C4059 0.1 F R4038 C4061 FROM/TO HIFI FROM/TO MICON 680K 0.01 B NORMAL_A Y/C_CLK Y/C_AUDIO Y/C_DATA C4078 Y/C_CS...

  • Page 46: Micon

    MICON SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO HIFI FROM POWER V.REC_ST_H AT+5V[BACKUP] HIFI_ENV HIFI_H.SW AT+5V[UCON] P.CON+5V SERVICE C1056 R103210K TP1001 ST_SELECT W885 0.1 B AT+12V VCR_A_MUTE MOTOR_GND W927 C1044 C1034 CYL/LOADING MOTOR DRIVER 220P CH IC1004 LB11880 0.1 F C1045 C1035 C1078 FROM/TO Y/C/A/H.AMP R1029...

  • Page 47: Power

    POWER SCHEMATIC DIAGRAM (SYSCON PCB) 12.4 P.CON+8V REG. Q606 2SC2120Y P.CON+5V[CHROMA] REG. Q603 2SC13840W P.CON+5V[TU1] REG. TO Y/C/A/H.AMP Q602 2SC13840W AT+5V[UCON] P.CON+5V REG. Q611 D610 2SD734 AT+5V[BACKUP] TO MICON SB10-03A3 REG. R644 9V REG IC 8.7VREF Q610 IC603 KIA7809API 2SD734 100 1/4W AT+5V[BACKUP] R662...

  • Page 48: In/Out

    IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) TV POWER LED SW Q4204_1 REC LED SW KRC102RTK Q4205_1 FROM/TO SOUND AMP KRC102RTK SOUND_L+ SOUND_R+ FROM/TO CHASSIS SP_OUT_R T-REC LED SW SP_OUT_L CD4206 CH01388A Q4206_1 KRC102RTK SOUND_GND TO PLATE DECK SILDE CC4201 CC4202 TP-1S-05 TP-1S-05 FROM/TO MICON VCR_A_MUTE...

  • Page 49: Chroma/If

    CHROMA/IF SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO DIGITAL COMB FILTER FROM/TO MICON CP604 (CY901) C683 IMSA-9130S-06L P.CON+5V P.CON+5V 6.3V DEGAUSS_H POWER_FAIL[DC] OSD_R W921 OSD_G C IN OSD_B Y IN OSD_BLK MONITOR_V MONITOR V.OUT L618 L608 C676 100uH 33uH 150P CH AFT_M VCR_POWER_H TU1_VIDEO TV_POWER_H...
  • Page 50 SOUND AMP SCHEMATIC DIAGRAM (SYSCON PCB) SOUND AMP IC IC352 AN7522 HS352 763WAA0027 S810X FROM/TO IN/OUT SOUND_L+ C350 SOUND_R+ W874 SP_OUT_R W873 SP_OUT_L FROM CHROMA/IF SOUND_GND B301 SOUND+B W5RH3.5X5X1.0 SOUND_GND FROM/TO MICON R353 TV_POWER_H R359 TV_A_MUTE MUTE SW Q350 2SC2412K D301 MTZJ13B C302...
  • Page 51 HIFI SCHEMATIC DIAGRAM (SYSCON PCB) C5521 R5518 0.22 B 3.3K C5514 0.1 F FROM/TO IN/OUT AUDIO_OUT_L AUDIO_OUT_R FRONT_AUDIO_IN_L FRONT_AUDIO_IN_R REAR_AUDIO_IN_L C5561 REAR_AUDIO_IN_R 100P C5560 R5512 HIFI AUDIO/H.AMP/DEM IC 100P IC5501 2.7M AN3662FBP TU2_AUDIO C5506 0.1 F C5540 0.015 B DEM_BLK ZZ-PROM PILOT LOGIC...
  • Page 52 DIGITAL COMB FILTER SCHEMATIC DIAGRAM (COMB PCB) C903 L901_1 0.47 C907 820uH 6.3V C906 0.01 B C925 0.1 B C923 82P CH BUFFER C914_1 R905 Q901 2SC2412K C913 FROM/TO CHROMA/IF 0.01 B CY901 (CP604) IMSA-9130B-06 MONITOR V.OUT Y IN C IN L902_1 P.CON+5V 150uH 0305...
  • Page 53 TV POWER SCHEMATIC DIAAGRAM (MAIN PCB) 2.5A 125V CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, FROM/TO DEFLECTION REPLACE ONLY WITH THE SAME TYPE FUSE 2.5A 125V(F502) ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE SOUND+B N’UTILISER QUE DES FUSIBLE DE MEME TYPE 2.5A 125V(F502) TV.POWER_H P.CON+111V...
  • Page 54 DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC IC401 AN5522 THERMAL PROTECTION FROM SYSCON PCB CP402 003P-2100 PUMP UP 25.5 12.9 24.8 FROM/TO CHROMA/IF CP820A 52147-1310 SOUND+B TO DY SOUND GND CP401 H.OUT B05B-DVS V.FEEDBACK V.OUT R413 R416 L402 H.PULSE C409 39K +-1% 15K 1/4W TV POWER H...

  • Page 55: Crt

    CRT SCHEMATIC DIAGRAM (CRT PCB) TP804 RED AMP W853 Q810 2SC1740SP R828 2.7K 1/4W RED AMP Q801 123.5 2SC2621 R813 D801 220 1/4W 1SS133 R810 1.8K 1/4W TP805 108.3 FROM CHROMA/IF J801 C801 CVT3275-5101 GREEN AMP W849 117.2 CP805 Q811 52147-0510 0.001 B 2SC1740SP...

  • Page 56: Operation

    OPERATION SCHEMATIC DIAGRAM (OPERATION PCB) W805 R754 1/4W FROM/TO MICON/TUNER R778 R771 R772 R773 R774 CD757_2 (CP755) 820 1/4W 1K 1/4W 1.5K 1/4W 2.7K 1/4W 5.6K 1/4W CU2A2501 REMOCON OUT AT+5V POWER ON LED POWER ON L Vout KEY A T-REC LED OS753 R775...

  • Page 57: Deck

    DECK SCHEMATIC DIAGRAM (DECK PCB) LOADING MOTOR M101 S105 BOT SENSOR S106 Q101 RPT-38PB113 S101 S102 S103 S104 FROM/TO SYSCON/SERVO/TIMER CP101 52044-0445 LDM+ LDM- PCB550 VE8851 CAUTION: SINCE THESE PARTS MARKED BY ATTENTION: LES PIECES REPAREES PAR UN ETANT NOTE: THE DC VOLTAGE AT EACH PART WAS NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME MEASURED WITH THE DIGITAL TESTER...

  • Page 58: Interconnection Diagram

    INTERCONNECTION DIAGRAM DIJITAL COMB FILTER PCB330 VEA943 HALL MAIN ROTOR REMOCON SENSOR SENSOR COIL MAGNET OS753 TM101 FG SENSOR J701 CD757 CP4201 REMOCON OUT Vout AT+5V POWER ON L HALL HALL J351 SWITCH KEY A LOGIC CP1004 T-REC LED REC LED MOTOR GND KEY B I LIMIT...

  • Page 59: Waveforms

    WAVEFORMS Y/C/AUDIO/CCD/ MICON HEAD AMP REC/PB REC/PB REC/PB 0.5V 20µs/div 1V 0.5ms/div 1V 10ms/div REC/PB REC/PB 1V 2ms/div 1V 50ns/div 100mV 0.5µs/div IN/OUT REC/PB REC/PB 100mV 5ms/div 1V 5ms/div 200mV 20ns/div REC/PB REC/PB 0.5V 20µs/div 0.5V 1ms/div 2V 20µs/div CHROMA/IF REC/PB 15 200mV 20µs/div 20V 10µs/div...
  • Page 60 WAVEFORMS 200mV 20µs/div 0.5V 5µs/div 1V 10ms/div 20.0V 20µs/div 20V 1ms/div 200mV 20µs/div DEFLECTION HIFI 20.0V 20µs/div 0.5V 20µs/div 22 200mV 2ms/div 20.0V 20µs/div 5V 20µs/div 23 200mV 2ms/div TV POWER 5V 0.1ms/div 0.5V 5ms/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

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