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Memorex MVR4041 Service Manual

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MVR4041
SERVICE MANUAL
VIDEO CASSETTE RECORDER
ORIGINAL
MFR'S VERSION A
Design and specifications are subject to change without notice.

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  • Page 1 MVR4041 SERVICE MANUAL VIDEO CASSETTE RECORDER ORIGINAL MFR’S VERSION A Design and specifications are subject to change without notice.

  • Page 2: Servicing Notices On Checking

    SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 3. PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER As for the places which need special attentions, ASSEMBLING OR WIRING they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the There are parts which use the insulation indications and notices in the operation manual.

  • Page 3: Table Of Contents

    CONTENTS SERVICING NOTICES ON CHECKING ..................A1-1 HOW TO ORDER PARTS ......................A1-1 CONTENTS ..........................A2-1 GENERAL SPECIFICATIONS ....................A3-1~A3-6 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS ..........B1-1 2. REMOVAL OF DECK PARTS .................... B2-1~B2-5 KEY TO ABBREVIATIONS ......................

  • Page 4: General Specifications

    GENERAL SPECIFICATIONS System VHS Player / Recorder System Video System NTSC Hi-Fi STEREO NTSC PB(PAL60Hz) Deck DECK OVD-6S Loading System Front Motor Heads Video Head 4Head FM Audio Head 2Head Normal Audio /Control Mono Erase(Full Track Erase) Tape Speed NTSC SP/SLP Play NTSC...
  • Page 5 GENERAL SPECIFICATIONS Interface Switch Front 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 Rear RF Output SW Indicator Power Stand by Rec/OTR Repeat Tape In Kurupika Guide One Touch Playback Terminals...
  • Page 6 GENERAL SPECIFICATIONS G-11 On Screen Menu Display Menu Type Character Timer Rec Set Auto Repeat On/Off SAP On Off CH Set-Up TV/CATV Auto CH Memory Add/Delete Pin Code Registration System Set-Up Clock Set Yes (Calendar 12H) Language No Noise Back Ground G-CODE(or SHOWVIEW or PLUSCODE)No.
  • Page 7 GENERAL SPECIFICATIONS G-14 Clock,Timer Calendar 1990/1/1 ~ 2089/12/31 and Timer Timer Events 8 prog/1 month Back-up One Touch Recording Max Time 5 Hours OTPB Valid Time Timer Back-up (at Power Off Mode) 5 sec. G-15 Remote Unit RC-EA Control Glow in Dark Remocon Power Source Voltage(D.C) UM size x pcs...
  • Page 8 GENERAL SPECIFICATIONS G-16 Features Auto Head Cleaning Auto Tracking Index Search HQ (VHS Standard High Quality) Auto Power On, Auto Play, Auto Rewind, Auto Eject Auto Power Off Forward/Reverse Picture Search VIDEO PLUS+(SHOWVIEW,G-CODE) One Touch Playback Picture Control Auto Preset Channel Lock Hotel Lock Anti Theft...
  • Page 9 GENERAL SPECIFICATIONS G-18 Carton Master Carton Content Material Dimensions W x D x H(mm) Description of Origin Gift Box Material Single/White Dimensions W x D x H(mm) 430x310x165 Design As Per BUYER 's Description of Origin Drop Test Natural Dropping At 1Corner / 3Edges / 6Surfaces Height (cm) Container Stuffing(40' container)

  • Page 10: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS 1-3: DECK CHASSIS (Refer to Fig. 1-3) Remove the 3 screws 1. AND P.C. BOARDS Remove the screw 2. 1-1: TOP CABINET, FRONT CABINET AND Disconnect the following connectors: (CP1001, CP1002, OPERATION PCB (Refer to Fig. 1-1) CP1003, CP4001, CP4002 and CP4003).

  • 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) Slide the 2 supports 1 and remove the Top Bracket. Top Bracket Tape Guide L Top Bracket...
  • Page 12 DISASSEMBLY INSTRUCTIONS 2-6: LINK UNIT (Refer to Fig. 2-6) Tension Adjust Set the Link Unit to the Eject position. Remove the (A) side of the Link Unit first, then remove Tension Band Ass'y the (B) side. Tension Spring Tension Arm Ass'y Link Unit Tension Holder SS Brake Spring...
  • Page 13 DISASSEMBLY INSTRUCTIONS 2-10: S REEL/T REEL (Refer to Fig. 2-10) NOTE Remove the S Reel and T Reel. Do not touch the Pinch Roller. (Use gloves.) Remove the 2 Polyslider Washers 1. When you install the Pinch Roller Block, install as shown in the circle of Fig.
  • Page 14 DISASSEMBLY INSTRUCTIONS 2-14: AHC ASS'Y/CYLINDER UNIT ASS'Y (Refer to Fig. 2-14) Middle Gear Unlock the support 1 and remove the AHC Ass'y. E-Ring Remove the 3 screws 2. Remove the Cylinder Unit Ass'y. Main Cam NOTE Pinch Roller Cam When you install the Cylinder Unit Ass'y, tighten the screws from (1) to (3) in order while pulling the Ass'y Joint Gear toward the left front direction.
  • Page 15 DISASSEMBLY INSTRUCTIONS 2-18: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-18-A) 2. When you install the Clutch Actuator, install as shown in the circle of Fig. 2-18-C. (Refer to Fig. 2-18-C) Remove the E-Ring 1 and remove the Main Loading Gear.

  • Page 16: 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 17 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 18: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. Method Operations Press the ATR button on the Adjusting of the Tracking to the center position. remote control for more than Refer to the "MECHANICAL ADJUSTMENT"...

  • Page 19: 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 20: Servicing Fixtures And Tools

    SERVICING FIXTURES AND TOOLS (For 2 heads model) (For 4 heads model) JG002B Adapter JG005 Post Adjustment VHS Alignment Tape VHS Alignment Tape JG002E Dial Torque Gauge Screwdriver JG001 (VN S-LI6 ) JG001B (VN S-LI6 ) (10~90gf•cm) Part No. SV-TG0-030-000 JG001A (VN S-CO1 ) JG001I...

  • Page 21: 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 22 MECHANICAL ADJUSTMENTS 1-4: CONFIRMATION OF VSR TORQUE 2. CONFIRMATION AND ADJUSTMENT OF TAPE RUNNING MECHANISM Operate within 4~5 seconds after the reel disk begins to turn. Tape Running Mechanism is adjusted precisely at the Install the Torque Gauge (JG002F) and Adapter (JG002B) factory.
  • Page 23 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 24 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 25: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS Read and perform this adjustment when repairing the circuits or replacing electrical parts or PCB assemblies. 1.BASIC ADJUSTMENT CAUTION When replacing IC's or transistors, use only specified silicon grease (YG6260M). (To prevent the damage to IC's and transistors.) 1-1: PG SHIFTER CONDITIONS MODE-PLAYBACK...
  • Page 26 ELECTRICAL ADJUSTMENTS 2. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE V651 TP1001 T501 VR1001 TU6001 TP4001 TP1002 TP4201 J4201 SYSCON PCB D2-2...

  • Page 27: Y/C/Audio/Ccd/Head Amp

    Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM X4001 3.579545MHz Q4012 Q4010 BUFFER BUFFER Y/C/AUDIO/CCD/HEAD AMP IC IC4001 LA71200M-MPB VX01 PULL Y/C_CS SYSCON/ SERIAL TIMMING CLAMP Y/C_DATA DECK DRIVER DECODER Y/C_CLK H.SW DETAL FM-EQ EMPHA CLAMP CONV CP4001 C-LPF EP/LP-CH2 (L) Y-LPF EP/LP_COM EP/LP-CH1 (R) H.AMP YNR/ B-UP...

  • Page 28: System Control/Deck

    SYSTEM CONTROL/DECK BLOCK DIAGRAM TIMER SYSCON SERVO CONTROLLER IC IC1001 OEC8071A SENS LED Y/C CLK 14 Y/C_CLK Q1003 MS SEN-A Y/C CS 15 Y/C_CS AT + 5.2V SENSOR SW MS SEN-B Y/C DATA Y/C_DATA MS_SEN B MS_SEN A DUMMY V.SYNC DUMMY_V.SYNC Q1004 Q1005...
  • Page 29 TUNER BLOCK DIAGRAM FRONT IN JACK REAR OUT JACK VIDEO AUDIO L AUDIO R J4201 J4203 J4204 J4205 Q4201 VIDEO_OUT SYSCON/DECK BUFFER TUNER_V Y/C/AUDIO/CCD P. CON + 12V FRONT_V_IN HEAD AMP FRONT_A_IN-R FRONT_A_IN-L AUDIO_OUT_R HI-FI/ AUDIO_OUT_L DEMODULATOR Q4203 TU6001 MUTE SW RF_CONV_A.
  • Page 30 HI-FI/DEMODULATOR BLOCK DIAGRAM HI-FI AUDIO/HEAD AMP/DEM IC IC5501 AN3662FBP FRONT_A_IN-R INPUT SW FRONT_A_IN-L AUDIO_OUT_R Y/C/AUDIO/ TUNER OUTPUT HF_COM CCD/ HEAD AMP AUDIO_OUT_L RF_CONV_A. OUT FROM_NORMAL_A TUNER_A TO_NORMAL_A FM LIM V. REC_ST-H BLOCK HIFI_ENV. DET HIFI_H. SW SYSCON/DECK AUDIO_MUTE-H IIC_CLK LOGIC IIC_DATA ST_SELECT...
  • Page 31 POWER BLOCK DIAGRAM T501 +32V Q512 P. CON P. CON +12V +12V SW Q509 P. CON P. CON + 5V +5V SW IC501 KIA431 D505, D508, VOLTAGE Q513 D523, D528 CTL IC P. ON SW Q503 Q502 Q511 PHOTO CONTROL COUPLER Q515 AT +5V[M-CON]...
  • Page 32 OPERATION BLOCK DIAGRAM V651 LTG-Y2K22M-J 15 14 13 12 11 10 9 Q651 5G SW Q652 SEG10 SEG10 SW Q653 SEG9 SW SEG9 Q654 4G SW Q655 SEG8 SW SEG8 Q656 SEG7 SW SEG7 Q657 SEG6 SW SEG6 Q658 SYSCON/DECK SEG5 SW SEG5 Q659...

  • Page 33: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS SYSCON/OPERATION (INSERTED PARTS) DECK SOLDER SIDE SOLDER SIDE CP101 S105 S101 SW660 SW659 V651 CP651_1 S104 J4205 S103 W056 W055 C520 R521 W160 S102 D525 D512 Q101 W092 Q515 Q509 R523 Q512 W851 W818 W852 W090 R520 SW608 R1019 W089...
  • Page 34 PRINTED CIRCUIT BOARDS SYSCON/OPERATION (CHIP MOUNTED PARTS) SOLDER SIDE C5544 C5545 C5543 C4023 C5541 C5542 R5507 R6006 R4001 Q4003 C4015 R1061 R1004 C4019 IC4001 R1010 R4202 Q4203 R5513 C1011 Q4204 C4064 C4061 R4038 C4054 C4060 R4039 Q4010 Q4012 R1016 C6014 R1014 R516 C6004...
  • Page 35 Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) BUFFER Q4012 2SC2412K R4041 1.8K FROM/TO POWER P.CON+5V FROM/TO TUNER C4058 FRONT_V_IN 6.3V C4059 TUNER_V 0.1 F R4038 C4061 FROM/TO HIFI/DEMODUTATOR 680K 0.01 B TO_NORMAL_A FROM_NORMAL_A HF_COM BUFFER C4016 COMP OUT ALWAYS 4Fsc CLOCK AUDIO C-ROT C-GND...
  • Page 36 SYSCON SCHEMATIC DIAGRAM FROM/TO (SYSCON PCB) FROM/TO POWER Y/C/AUDIO/CCD/H.AMP P.CON+5V AT+12.6_V FF/REW SW Y/C_CLK CAP_VCO Q1010 KRC103RTK Y/C_CS AT+5V[M-CON] AT+5.2V Y/C_DATA P.SAVE_OFF_5V DUMMY_V.SYNC POWER_ON-L V.REC_ST-H POWER_FAIL C.ROTARY MODE_VCC (S/S) AUDIO_MUTE-H C1038 OSD_V (CAP) 0.0022 Y CTL- R1026 C1040 (CYL/LDM) AT+5V[M-CON] CTL+ 0.01 B R1015...
  • Page 37 TUNER SCHEMATIC DIAGRAM (SYSCON PCB) REAR OUT JACK TU6001 J4201 AV3-15D-1 TMDH2-A05A R6006 RF_CONV_A.OUT A.IN W853 RF_CH_SW VIDEO OUT W844 TP4201 TV/VCR CONTROL R6004 V.IN 1K 1/4W RF AGC R4212 AUDIO_OUT-R C4209 R4206 W804 AUDIO_OUT-L IIC_CLK R4201 R4207 CLOCK MUTE SW P.CON+12V P.SAVE_OFF_5V Q4204...

  • Page 38: Tuner

    POWER SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO HIFI/DEMODULATOR P.CON+12V P.CON+5V FROM/TO TUNER R549 +32V 330 1/4W P.SAVE_OFF_5V P.CON+5V 12.5 12.4 P.CON+12V (TUNER) 13.1 P.CON+12V SW Q512 KTC3203_Y FROM/TO Y/C/AUDIO/CCD/H.AMP D521 1SS244 R525 P.ON SW P.CON+5V Q513 KRC103RTK L501 13.3 R503 D505 0R3A433F20 1N4005-EIC D508...
  • Page 39 OPERATION/DISPLAY SCHEMATIC DIAGRAM (SYSCON PCB) V651 LTG-Y2K22M-J 1G SW (OPERATION PCB) Q665 2SA1037AK FROM/TO POWER SEG1 SW Q664 AT+5.2V KRC103RTK AT+5.2V_A R674 REW/REV (FIP) SW607 SEG2 SW Q663 (SYS) KRC103RTK SKQNAED010 R673 SEG3 SW 5G SW Q662 Q651 2SA1037AK KRC103RTK R672 FROM/TO SYSCON 2G SW...
  • Page 40 HI-FI/DEMODULATOR SCHEMATIC DIAGRAM (SYSCON PCB) C5514 0.1 F C5521 R5519 3.3K 1/4W 0.22 FROM/TO TUNER HI-FI AUDIO/HEAD AMP/DEM IC IC5501 FRONT_A_IN-R R5513 AN3662FBP FRONT_A_IN-L 2.2M AUDIO_OUT-R C5506 C5540 0.015 B DEM_BLK ZZ-PROM PILOT LOGIC AUDIO_OUT-L C5501 C5517 C5507 INPUT MUTE VCO-F0 75uS RF_CONV_A.OUT DE-EMPH...
  • Page 41 DECK SCHEMATIC DIAGRAM (DECK PCB) LOADING MOTOR M101 S105 BOT SENSOR S106 Q101 RPT-38PB113 S101 S102 S103 S104 FROM/TO SYSCON LDM+ LDM- 52044-0445 CP101 (CP1003) PCB550 VE8851 NOTE: NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME THE DC VOLTAGE AT EACH PART WAS CAUTION: SINCE THESE PARTS MARKED BY ATTENTION:...

  • Page 42: Interconnection Diagram

    INTERCONNECTION DIAGRAM FULL ERASE HEAD ASS’Y H5002 HALL MAIN ROTOR SENSOR COIL MAGNET FG SENSOR OPERATION PCB PCB270 VEX927 HALL HALL SWITCH LOGIC CP1002 MOTOR GND I LIMIT VCO(12V) CAP FG S502 CAP.M F/R WHITE VCC(5V) CAPSTAN DD UNIT S501 M2001 BLACK CD501...

  • Page 43: Waveforms

    WAVEFORMS POWER SYSTEM CONTROL Y/C/AUDIO/CCD/HEAD AMP POWER ON 10µs 500mV/div 200ms 1.0V/div 2µs 50.0V/div HIFI/DEMODULATOR 2 POWER ON 5ms 1.0V/div 100ns 100mV/div 200ms 1.0V/div 3 PB POWER ON 1ms 100mV/div 50ns 500mV/div 500µs 200mV/div 500µs 1.0V/div 11 PB 5 REC 200µs 1.0V/div 5µs 20.0V/div NOTE:...

  • Page 44: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW TU6001 J4201 PCB010 T501 (SYSCON PCB) PCB270 (OPERATION PCB)

  • Page 45: Chassis Exploded Views

    CHASSIS EXPLODED VIEW (TOP VIEW) M2003 UN4001 H5001 H5002 M101 PCB550 (DECK PCB ASS'Y) NOTE: Applying positions AA, AB, AC and BA for the CLASS PART NO. MARK grease or oil are displayed for this section. GREASE G-555G Check if the correct grease or oil is applied for MG-33 each position.
  • Page 46 CHASSIS EXPLODED VIEW (BOTTOM VIEW) M2001 NOTE: Applying positions AA, AB, AC and BA for the CLASS PART NO. MARK grease or oil are displayed for this section. GREASE G-555G Check if the correct grease or oil is applied for each position.

  • Page 47: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A4E404B720 CABINET,FRONT ASSY 701WPJ1006 CABINET,FRONT 711WPA0107 PLATE,DISPLAY 712WPJ0728 FLAP 743WKA0032 SPRING,FLAP 735WPD0730 BUTTON,DECK 735WPAA194 HOLDER,CHANNEL 800WFA0045 CUSHION,LEG 701WPAA147 HOLDER,DECK 702WPA0777 PLATE,JACK 752WSA0230 SHIELD,CASE HEAD AMP 723000A698 SHEET,DISPLAY 735WPD0731 BUTTON,FRAME 755WPA0019 PLATE,COVER POWER 85OP700036 HOLDER,EOT SENSOR 702WSBA027 CABINET,TOP 722A080029 SHEET,RATING...

  • Page 48: Chassis Replacement Parts List

    CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION A4E404A420K DECK ASSY A4E404A420K 8107126A04 SCREW,TAP TITE(S) PAN 2.6x10 8107226804 SCREW,TAP TITE(S) BIND 2.6x8 85OA500022 AHC ASS'Y 8107226604 SCREW,TAP TITE(S) BIND 2.6x6 85OP200290 BELT,CAPSTAN (S) 8109126604 SCREW,TAP TITE(B) PAN 2.6x6 85OP900710 LEVER,REC...

  • Page 49: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS TRANSISTORS ! R502 R03102335J 3.3M OHM 1/2W Q4006 TCAT032034 TRANSISTOR, SILICON KTC3203_Y-AT ! R512 R002T2333J 33K OHM 1/2W Q4010 T6YJ1037K0 TRANSISTOR, SILICON 2SA1037AKT146R,S ! R514 R3X181010J R,METAL OXIDE OHM 1W...
  • Page 50 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 J3-2...
  • Page 51 M4E4-04B SPEC.NO. K124004 O/R NO.
  • Page 52 MVR4041 Series A SERVICE MANUAL VIDEO CASSETTE RECORDER ORIGINAL MFR’S VERSION A Design and specifications are subject to change without notice.
  • Page 53 SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 3. PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER As for the places which need special attentions, ASSEMBLING OR WIRING they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the There are parts which use the insulation indications and notices in the operation manual.

  • Page 54: J3-1, J3-2

    CONTENTS SERVICING NOTICES ON CHECKING ..................A1-1 HOW TO ORDER PARTS ......................A1-1 CONTENTS ..........................A2-1 GENERAL SPECIFICATIONS ....................... A3-1~A3-4 DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS AND P. C. BOARDS ..........B1-1 2. REMOVAL OF DECK PARTS ....................B2-1~B2-6 3.
  • Page 55 GENERAL SPECIFICATIONS System VHS Player / Recorder System Video System NTSC Hi-Fi STEREO NTSC PB(PAL60Hz) Deck DECK OVD-7 Loading System Front Motor Heads Video Head 4Head FM Audio Head 2Head Normal Audio /Control Mono / Yes Erase(Full Track Erase) Tape Speed NTSC SP/SLP...
  • Page 56 GENERAL SPECIFICATIONS Pin Code Registration System Set-Up Clock Set Yes (Calendar 12H) Language No Noise Back Ground G-CODE(or SHOWVIEW or PLUSCODE)No. Entry NICAM 1/2,NICAM Off,Audio Output Stereo,Audio Output,SAP Play/Stop/FF/Rew/Rec/OTR/T-Rec/Pause/Eject/Tape In (Symbol Mark) CH/AV Clock Repeat Pin Code Tape Counter Index Hotel Lock Tape Speed Manual Tracking (Bar Setting)
  • Page 57 GENERAL SPECIFICATIONS Stop Rec/OTR Eject Counter Reset Speed Timer Rec TV Monitor Quick View Program Slow Auto Tracking Set/Tracking+ Set/ Tracking - Menu Enter Cancel Call TV/VCR Sleep Timer Muting Clock/Counter Zero Return CM Skip Audio Select G-13 Features Auto Head Cleaning Auto Tracking Index Search HQ (VHS Standard High Quality)

  • Page 58: Contents

    GENERAL SPECIFICATIONS AC Cord AV Cord (2Pin-1Pin) Registration Card PTB Sheet Tape Rewinder(Buyer Supply) 300 ohm to 75 ohm Antenna Adapter G-15 Interface Switch Front 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...

  • Page 59: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1-3: DECK CHASSIS (Refer to Fig. 1-3) 1. REMOVAL OF MECHANICAL PARTS Remove the 3 screws 1. AND P.C. BOARDS Disconnect the following connectors: (CP1001, CP4001, 1-1: TOP CABINET, FRONT CABINET AND CP4002 and CP4003). OPERATION PCB (Refer to Fig. 1-1) Remove the Deck Chassis in the direction of arrow.

  • Page 60: 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 61 DISASSEMBLY INSTRUCTIONS 2-6: LOADING MOTOR/WORM (Refer to Fig. 2-6-A) Remove the screw 1. Remove the Loading Motor. Tension Connect Tension Band Remove the Worm. Tension Spring Tension Arm Ass'y Loading Motor Tension Holder Worm Main Chassis Fig. 2-7-B • Screw Torque: 3 ± 0.5kgf•cm Fig.
  • Page 62 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 63 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. A/C Head Cassette Opener A/C Head Spring Pinch Roller Block A/C Head Base P5 Arm Ass'y •...
  • Page 64 DISASSEMBLY INSTRUCTIONS 2-13: AHC ASS'Y/CYLINDER UNIT ASS'Y 2-15: MAIN CAM/PINCH ROLLER CAM/JOINT GEAR (Refer to Fig. 2-13) (Refer to Fig. 2-15-A) Unlock the support 1 and remove the AHC Ass'y. Remove the E-Ring 1, then remove the Main Cam. Remove the E-Ring 2, then remove the Pinch Roller Disconnect the following connector: Cam and Joint Gear.
  • Page 65 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 66: 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. 3-3.) REMOVAL NOTE Put the Masking Tape (cotton tape) around the Flat...
  • Page 67 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. 3-8.) new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

  • Page 68: 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 69 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 70: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. Method Operations Press the ATR button on the Adjusting of the Tracking to the center position. remote control for more than Refer to the "MECHANICAL ADJUSTMENT"...

  • Page 71: 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 72: Servicing Fixtures And Tools

    SERVICING FIXTURES AND TOOLS (For 2 heads model) (For 4 heads model) JG002B Adapter JG005 Post Adjustment VHS Alignment Tape VHS Alignment Tape JG002E Dial Torque Gauge Screwdriver JG001 (VN S-LI6 ) JG001B (VN S-LI6 ) (10~90gf•cm) Part No. SV-TG0-030-000 JG001A (VN S-CO1 ) JG001I...

  • Page 73: 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 parts for the Tension Arm position the Cassette Tape to keep it steady when you want to so that the Tension Arm top is within the standard line of make the tape run without the Cassette Holder.
  • Page 74 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 75 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 76 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 parts for the Tension Arm position D1-4...

  • Page 77: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS Read and perform this adjustment when repairing the circuits or replacing electrical parts or PCB assemblies. 1. BASIC ADJUSTMENT CAUTION When replacing IC's or transistors, use only specified silicon grease (YG6260M). (To prevent the damage to IC's and transistors.) 1-1: PG SHIFTER CONDITIONS MODE-PLAYBACK...
  • Page 78 ELECTRICAL ADJUSTMENTS 2. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE TP1001 J4205 J4204 J4203 T501 VR1001 TU6001 TP4001 TP1002 TP4201 J4201 SYSCON PCB D2-2...

  • Page 79: Y/C/Audio/Ccd/Head Amp

    Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM X4001 100CT3R508 Q4012 Q4010 BUFFER Y/C/AUDIO/CCD/HEAD AMP IC BUFFER IC4001 LA71201M-N-MPB PULL VX01 Y/C_CS SERIAL SYSCON/ IIC_DATA TIMMING DRIVER CLAMP SERVO DECODER IIC_CLK H.SW DETAL FM-EQ EMPHA CLAMP CP4001 CONV C-LPF EP/LP-CH2 (L) Y-LPF EP/LP_COM EP/LP-CH1 (R) H.AMP B-UP Main...
  • Page 80 SYSTEM CONTROL/SERVO BLOCK DIAGRAM TIMER SYSCON SERVO CONTROLLER IC IC1001 OEC0105A CENT LED P.OFF-L 4FSC Q1007 MS SEN-A MODE_VCC FS/IIC CLK 18 IIC_CLK CENT SW MS SEN-B IIC DATA IIC_DATA MS_SEN B MS_SEN A Y/C_CS Y/C_CS Q1004 Q1005 DUMMY V.SYNC DUMMY_V.SYNC V.REC ST-H V.REC_ST-H...
  • Page 81 TUNER BLOCK DIAGRAM FRONT AV JACK VIDEO AUDIO L AUDIO R REAR OUT JACK J4203 J4204 J4205 J4201 Q4201 VIDEO_OUT BUFFER SYSCON/SERVO RF_CH_SW TUNER_V Y/C/AUDIO/CCD P. CON + 12V FRONT_V_IN HEAD AMP FRONT_A_IN-R FRONT_A_IN-L AUDIO_OUT_R HI-FI/ AUDIO_OUT_L DEMODULATOR Q4203 TU6001 MUTE SW RF_CONV_A.
  • Page 82 HI-FI/DEMODULATOR BLOCK DIAGRAM HI-FI AUDIO/HEAD AMP/DEM IC IC5501 AN3663FBP FRONT_A_IN-R INPUT SW FRONT_A_IN-L AUDIO_OUT_R Y/C/AUDIO/CCD/ TUNER OUTPUT HF_COM HEAD AMP AUDIO_OUT_L RF_CONV_A. OUT FROM_NORMAL_A TUNER_A TO_NORMAL_A FM LIM V. REC_ST-H BLOCK HIFI_ENV. DET HIFI_H. SW SYSCON/SERVO AUDIO_MUTE-H IIC_CLK LOGIC IIC_DATA ST_SELECT...
  • Page 83 OPERATION BLOCK DIAGRAM V651 LTG-Y2K22M-J 15 14 13 12 11 10 9 Q651 5G SW Q652 POWER SEG_10 SEG10 SW Q653 CH UP KEY-B SEG_9 SEG9 SW Q654 CH DOWN SYSCON/SERVO KEY-A 4G SW Q655 STOP/EJECT SEG8 SW SEG_8 OS651 REMOCON Q656 REC/OTR...

  • Page 84: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS SYSCON/OPERATION (INSERTED PARTS) SOLDER SIDE SW660 SW659 V651 OS651 W864 W113 L505 C520 CP651_1 R1043 W036 D513 D514 Q509 Q512 X1001_1 SW604_4 Q515 C502 R604 D524 D512 SW605 SW608 W029 W112 R520 W033 D521 W123 W046 D501 CP601_1 W034 W150...
  • Page 85 PRINTED CIRCUIT BOARDS SYSCON/OPERATION (CHIP MOUNTED PARTS) SOLDER SIDE Q4203 R6006 C5545 R4202 C5544 C5543 C5541 R5507 C4028 R4206 C5542 Q4204 Q4003 C4015 R4021 R5502 C4032 C4019 C5508 C5504 C5530 R5513 C5514 R4039 C4061 C4060 C6014 Q4012 R516 Q4010 C4054 R4036 R4034 Q4011...
  • Page 86 Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) R4041 1.8K BUFFER Q4012 2SC2412K FROM POWER P.CON+5V FROM/TO TUNER C4058 FRONT_V_IN 6.3V C4059 TUNER_V 0.1 F R4038 C4061 FROM/TO HI-FI/DEMODUTATOR 680K 0.01 B BUFFER Q4011 TO_NORMAL_A 2SC2412K FROM_NORMAL_A 4FSC HF_COM BUFFER C4016_1 COMP OUT ALWAYS 4Fsc CLOCK...
  • Page 87 SYSTEM CONTROL/SERVO SCHEMATIC DIAGRAM FROM/TO POWER POWER_FAIL (SYSCON PCB) LED_VCC POWER_ON-L AT+5V[M-CON] P.CON+5V AT+5.2V AT+12.6_V (S/S) (MOTOR) (LED) FROM/TO HI-FI/DEMODULATOR V.REC_ST-H HIFI_ENV.DET HIFI_H.SW AUDIO_MUTE-H IIC_CLK IIC_DATA ST_SELECT FROM/TO Y/C/AUDIO/CCD/HEAD AMP C1001 4FSC FROM/TO DECK X1001_1 IIC_CLK CP1001 1002T01003 IIC_DATA TMC-J12P-B2 L1001 CAP_FG L1002...

  • Page 88: Power

    POWER SCHEMATIC DIAGRAM (SYSCON PCB) TO HI-FI/DEMODULATOR +12V TO TUNER (TUNER) R549 +32V 330 1/4W 11.8 11.7 +12V 12.4 P.CON+12V SW Q512 KTC3203_Y D521 AT+5.2V 1SS244 R525 P.ON SW P.CON+5V Q513 1/4W KRC103SRTK L501 12.7 TO Y/C/AUDIO/CCD/HEAD AMP R503 D505 0R3A433F20 AC120V_60Hz P.CON+5V...

  • Page 89: Operation

    OPERATION SCHEMATIC DIAGRAM (SYSCON PCB) V651 LTG-Y2K22M-J 1G SW Q665 2SA1037AK SEG1 SW Q664 KRC103SRTK R674_1 SEG2 SW 1/4W Q663 KRC103SRTK R673_1 SEG3 SW 180 1/4W 5G SW Q662 Q651 2SA1037AK KRC103SRTK R672_1 2G SW 180 1/4W SEG10 SW Q661 Q652 2SA1037AK KRC103SRTK...

  • Page 90: Tuner

    TUNER SCHEMATIC DIAGRAM (SYSCON PCB) REAR OUT JACK TU6001 J4201 MSP-213V1-432_PBSN TCMN0682PA13D R6006 RF_CONV_A.OUT A.IN RF_CH_SW VIDEO OUT W844 TP4201 TV/VCR CONTROL R6004 V.IN 1/4W RF AGC R4212 AUDIO_OUT-R C4209 R4206 W804 AUDIO_OUT-L IIC_CLK_A R4201 R4207 CLOCK MUTE SW AT+5.2V Q4204 MUTE SW 4701/2W...
  • Page 91 HI-FI/DEMODULATOR SCHEMATIC DIAGRAM (SYSCON PCB) C5514 0.1 F C5521 R5519 3.3K 1/4W 0.22 FROM/TO TUNER FRONT_A_IN-R FRONT_A_IN-L HI-FI/AUDIO/HEAD AMP/DEM IC IC5501 AUDIO_OUT-R R5513 AN3663FBP AUDIO_OUT-L 2.2M RF_CONV_A.OUT C5506 C5540 0.015 B DEM_BLK ZZ-PROM PILOT LOGIC TUNER_A C5501 C5517 C5507 INPUT MUTE VCO-F0 75uS HIFI ENV.

  • Page 92: Interconnection Diagram

    INTERCONNECTION DIAGRAM HALL MAIN ROTOR FULL ERASE HEAD ASS’Y SENSOR COIL MAGNET FG SENSOR H5002 LOADING MOTOR M101 OPERATION PCB HALL HALL SWITCH PCB270 LOGIC VEA958 CP1001 CAP_FG CAP_VCO VCC(5V) AC120V_60Hz CAP/M/F/R CD501 I_LIMIT MOTOR_GND WHITE S502 CYL/LAD_VCO BLACK CAP_CTL S501 LDM_CTL CAPSTAN DD UNIT...

  • Page 93: Waveforms

    WAVEFORMS Y/C/AUDIO/CCD/HEAD AMP SYSCON/SERVO 1 POWER ON 6 POWER ON 11 POWER ON 10µs 500mV/div 5ms 1.0V/div 50ns 1.0V/div 2 POWER ON 7 PB 12 FF/REW 100ns 100mV/div 2µs 1.0V/div 5ms 2V/div 3 PB 8 POWER ON 14 POWER OFF 1ms 100mV/div 500µs 1.0V/div 5ms 2V/div...
  • Page 94 MECHANICAL EXPLODED VIEW J4201 TU6001 J4203 PCB010 (SYSCON PCB) J4204 T501 J4205 PCB270 (OPERATION PCB)
  • Page 95 CHASSIS EXPLODED VIEW (TOP VIEW) M2003 UN4001 H5002 H5001 M101 NOTE: Applying positions AA and AB for the grease CLASS PART NO. MARK are displayed for this section. GREASE G-555G Check if the correct grease is applied for each MG-33 position.
  • Page 96 CHASSIS EXPLODED VIEW (BOTTOM VIEW) M2001 NOTE: Applying positions AA and AB for the grease CLASS PART NO. MARK are displayed for this section. GREASE G-555G Check if the correct grease is applied for each MG-33 position.
  • Page 97 MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A4F204B720 CABINET,FRONT ASSY 701WPJB398 CABINET,FRONT 711WPA0107 PLATE,DISPLAY 712WPJB128 FLAP 743WKA0032 SPRING,FLAP(COMBO) 735WPD0731 BUTTON,FRAME 800WFA0045 CUSHION,LEG 701WPA0686 HOLDER,DECK 723000A698 SHEET,DISPLAY 735WPD0730 BUTTON,DECK 735WPAA194 HOLDER,CHANNEL 701WPA0680 HOLDER,DECK 755WPA0020 PLATE,COVER POWER 85OP700036 HOLDER EOT SENSOR 702WSA0084 PLATE,BOTTOM 85OP700037 HOLDER,LED 722A08A092...
  • Page 98 CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION A4F201B420K DECK ASSY A4F201B420K 8107226804 SCREW,TAP TITE(S) BIND 2.6x8 8107226504 SCREW,TAP TITE(S) BIND 2.6x5 85OA400227 PINCH ROLLER BLOCK 8107226404 SCREW,TAP TITE(S) BIND 2.6x4 85OA500026 AHC ASS'Y 8102120604 SCREW,PAN M2x6...
  • Page 99 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS TRANSISTORS ! R502 R0G3K2335K RC 3.3M OHM 1/2W Q4005 TAATA12660 TRANSISTOR,SILICON KTA1266-AT(Y,GR) ! R512 R002T2333J RC 33K OHM 1/2W Q4006 TCAT032034 TRANSISTOR, SILICON KTC3203_Y-AT ! R514 R3X181010J R,METAL OXIDE OHM 1W Q4010...
  • Page 100 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 J3-2...
  • Page 101 M4F2-04B SPEC.NO. K1X4011 O/R NO.
  • Page 102 MVR4041 Series B SERVICE MANUAL VIDEO CASSETTE RECORDER ORIGINAL MFR’S VERSION B Design and specifications are subject to change without notice.
  • Page 103 SERVICING NOTICES ON CHECKING 3. PUT PARTS AND WIRES IN THE 1. KEEP THE NOTICES ORIGINAL POSITION AFTER As for the places which need special attentions, ASSEMBLING OR WIRING they are indicated with the labels or seals on the There are parts which use the insulation cabinet, chassis and parts.

  • Page 104: Mechanical Exploded View

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

  • Page 105: General Specifications

    GENERAL SPECIFICATIONS System VHS Player / Recorder System Video System NTSC Hi-Fi STEREO NTSC PB(PAL60Hz) Deck DECK OVD-7 Loading System Front Motor Heads Video Head 4Head FM Audio Head 2Head Normal Audio /Control Mono / Yes Erase(Full Track Erase) Tape Speed NTSC SP/SLP...
  • Page 106 GENERAL SPECIFICATIONS Frequency Response 20Hz ~20kHz Wow And Flutter : Less than 0.01 %Wrms Channel Separation : More than 60 dB Harmonic Distortion : Less than 0.01 On Screen Menu Display Menu Type Character Timer Rec Set Auto Repeat On/Off SAP On Off CH Set-Up TV/CATV...
  • Page 107 GENERAL SPECIFICATIONS F1,F2 RF Output CH Tape In G-12 Remote Unit RC-EA Control Glow in Dark Remocon Power Source Voltage(D.C) UM size x pcs UM-4 x 2 pcs Total Keys 35 Keys Keys Power CH Up CH Down Input Select Play F.Fwd Pause/Still...
  • Page 108 GENERAL SPECIFICATIONS One Touch Playback Picture Control Auto Preset Channel Lock Hotel Lock Anti Theft Audio Dubbing Remort Control Code 1/2 SQPB CATV Energy Star MTS(SAP) CM Skip(30sec x 6 Times) G-14 Accessories Owner's Manual Language English/Spanish w/Guarantee Card Remote Control Unit Dew Cation Sheet Video Cassette Tape Battery...
  • Page 109 GENERAL SPECIFICATIONS Indicator Power Stand by Rec/OTR Repeat TV/VCR T-Rec Tape In Terminals Front Video Input RCA x 1 Audio Input RCA x 2(Stereo) Other Terminal Rear Video Input Audio Input Video Output RCA x 1 Audio Output RCA x 2(Stereo) Euro Scart DC Jack 12V(Center +) VHF/UHF Antenna Input...

  • Page 110: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1-3: DECK CHASSIS (Refer to Fig. 1-3) 1. REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS Remove the 3 screws (1). Disconnect the following connectors: (CP1001, CP4001, 1-1: TOP CABINET, FRONT CABINET AND CP4002 and CP4003). OPERATION PCB (Refer to Fig. 1-1) Remove the Deck Chassis in the direction of arrow.

  • Page 111: 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 112 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 113 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 section to remove it. Idler Arm Ass'y Unlock the 2 supports (1) and remove the T Brake Band.
  • Page 114 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 115 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 E-Ring (1), then remove the Main Cam. Remove the 3 screws (1). Remove the E-Ring (2), then remove the Pinch Roller Remove the Capstan DD Unit.
  • Page 116 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. (Refer to Fig. 2-16-B) Unlock the support (1) and remove the Cassette Guide Post.

  • Page 117: 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. 3-3.) REMOVAL NOTE Put the Masking Tape (cotton tape) around the Flat...
  • Page 118 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. 3-8.) new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

  • Page 119: 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 120 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 121: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. Method Operations Press the ATR button on the Adjusting of the Tracking to the center position. remote control for more than Refer to the "MECHANICAL ADJUSTMENT"...

  • Page 122: 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 123: Servicing Fixtures And Tools

    SERVICING FIXTURES AND TOOLS (For 2 head model) (For 4 head model) JG002B Adapter JG005 Post Adjustment VHS Alignment Tape VHS Alignment Tape JG002E Dial Torque Gauge Screwdriver JG001 (VN S-LI6 ) JG001B (VN S-LI6 ) (10~90gf€cm) Part No. SV-TG0-030-000 JG001A (VN S-CO1 ) JG001I...

  • Page 124: 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 125 MECHANICAL ADJUSTMENTS NOTE 1-4: CONFIRMATION OF VSR TORQUE Install the Torque Gauge (JG002F) and Adapter If the torque is out of the range, replace the following (JG002B) on the S Reel. Set to the Picture Search parts. (Rewind) mode. (Refer to Fig.1-4-B) Check item Replacement Part Then, confirm that it indicates 120~180gf€cm.
  • Page 126 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 127 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 128: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS Read and perform this adjustment when repairing the circuits or replacing electrical parts or PCB assemblies. 1. BASIC ADJUSTMENT CAUTION When replacing IC's or transistors, use only specified silicon grease (YG6260M). (To prevent the damage to IC's and transistors.) 1-1: PG SHIFTER CONDITIONS MODE-PLAYBACK...
  • Page 129 ELECTRICAL ADJUSTMENTS 2. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) S502 AC IN CP4002 S501 TP4201 J4201 TP1002 TP4001 A/C HEAD TU6001 VR1001 T501 CP651_1 J4204 J4205 J4203 TP1001 SYSCON PCB CP601_1 OPERATION PCB D3-2...
  • Page 130 Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM X4001 100CT3R508 Q4011 Q4012 BUFFER Q4010 BUFFER Y/C/AUDIO/CCD/HEAD AMP IC BUFFER IC4001 LA71201M-N-MPB 4FSC PULL VX01 Y/C_CS SERIAL SYSCON/SERVO IIC_DATA TIMMING DRIVER CLAMP DECODER H.SW IIC_CLK DETAL EMPHA FM-EQ CLAMP CP4001 CONV C-LPF EP/LP-CH2 (L) Y-LPF EP/LP_COM EP/LP-CH1 (R) H.AMP...
  • Page 131 SYSTEM CONTROL/SERVO BLOCK DIAGRAM TIMER SYSCON SERVO CONTROLLER IC IC1001 OEC0105A D1001 Q1007 LED_VCC CENT SW CENT LED P.OFF-L 4FSC MS SEN-A FS/IIC CLK 18 IIC_CLK MS SEN-B IIC DATA IIC_DATA MS_SEN B Y/C_CS Y/C_CS MS_SEN A Q1004 Q1005 DUMMY V.SYNC DUMMY_V.SYNC V.REC ST-H V.REC_ST-H...

  • Page 132: Y/C/Audio/Ccd/Head Amp

    TUNER BLOCK DIAGRAM FRONT AV JACK AUDIO R VIDEO AUDIO L REAR OUT JACK J4203 J4204 J4205 J4201 Q4201 VIDEO_OUT BUFFER SYSCON/SERVO RF_CH_SW TUNER_V Y/C/AUDIO/CCD P. CON + 12V FRONT_V_IN HEAD AMP FRONT_A_IN-R FRONT_A_IN-L AUDIO_OUT_R AUDIO_OUT_L HI-FI/ Q4203 DEMODULATOR TU6001 MUTE SW RF_CONV_A.
  • Page 133 HI-FI/DEMODULATOR BLOCK DIAGRAM HI-FI AUDIO/HEAD AMP/DEM IC IC5501 AN3663FBP FRONT_A_IN-R INPUT SW FRONT_A_IN-L AUDIO_OUT_R Y/C/AUDIO/CCD/ TUNER OUTPUT HF_COM HEAD AMP AUDIO_OUT_L RF_CONV_A. OUT FROM_NORMAL_A TUNER_A TO_NORMAL_A FM LIM V. REC_ST-H BLOCK HIFI_ENV. DET HIFI_H. SW SYSCON/SERVO AUDIO_MUTE-H IIC_CLK LOGIC IIC_DATA ST_SELECT...
  • Page 134 OPERATION BLOCK DIAGRAM V651 ELF-4B6GWB/S294 15 14 13 12 11 10 9 Q651 5G SW Q652 POWER SEG10 SW SEG_10 Q653 CH UP KEY-B SEG9 SW SEG_9 Q654 CH DOWN KEY-A SYSCON/SERVO 4G SW Q655 STOP/EJECT SEG_8 SEG8 SW OS651 REMOCON Q656 REC/OTR...

  • Page 135: Printed Circuit Boards Syscon/Operation

    PRINTED CIRCUIT BOARDS SYSCON/OPERATION (INSERTED PARTS) SOLDER SIDE SW660 SW659 V651 W864 J4203 L505 J4204 J4205 W113 C520 C514 OS651 R1043 W036 Q512 D513 D514 CP651_1 Q509 X1001_1 Q515 C502 R604 D524 D512 SW608 W029 SW604_4 SW605 R520 W112 W033 D521 W123 W046...
  • Page 136 PRINTED CIRCUIT BOARDS SYSCON/OPERATION (CHIP MOUNTED PARTS) SOLDER SIDE Q4203 R6006 C5545 R4202 C5544 C5543 C5541 R5507 C4028 R4206 C5542 Q4204 Q4003 C4015 R4021 R5502 C4032 C4019 C5508 C5504 C5530 R5513 C5514 R4039 C4061 C6014 C4060 Q4012 R516 Q4010 C4054 R4036 R4034 Q4011...
  • Page 137 Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) R4041 1.8K BUFFER Q4012 2SC2412K FROM POWER P.CON+5V FROM/TO TUNER C4058 FRONT_V_IN 6.3V C4059 TUNER_V 0.1 F R4038 C4061 FROM/TO HI-FI/DEMODUTATOR 680K 0.01 B BUFFER Q4011 2SC2412K TO_NORMAL_A FROM_NORMAL_A 4FSC HF_COM BUFFER C4016_1 COMP OUT ALWAYS 4Fsc CLOCK...
  • Page 138 SYSTEM CONTROL/SERVO SCHEMATIC DIAGRAM FROM/TO POWER POWER_FAIL (SYSCON PCB) LED_VCC POWER_ON-L AT+5V[M-CON] P.CON+5V AT+5.2V AT+12.6_V (S/S) (MOTOR) (LED) FROM/TO HI-FI/DEMODULATOR V.REC_ST-H HIFI_ENV.DET HIFI_H.SW AUDIO_MUTE-H IIC_CLK IIC_DATA ST_SELECT FROM/TO Y/C/AUDIO/CCD/HEAD AMP C1001 4FSC FROM/TO DECK X1001_1 IIC_CLK CP1001 1002T01003 TMC-J12P-B2 IIC_DATA L1001 CAP_FG CAP_FG...
  • Page 139 POWER SCHEMATIC DIAGRAM (SYSCON PCB) TO HI-FI/DEMODULATOR +12V TO TUNER (TUNER) R549 +32V 330 1/4W 11.8 11.7 +12V 12.4 P.CON+12V SW AT+5.2V Q512 P.CON+5V KTC3203_Y D521 1SS244 R525 P.ON SW Q513 1/4W KRC103SRTK L501 12.7 TO Y/C/AUDIO/CCD/HEAD AMP R503 D505 0R3A433F20 AC120V_60Hz P.CON+5V...
  • Page 140 OPERATION SCHEMATIC DIAGRAM (SYSCON PCB) V651 ELF-4B6GWB/S294 1G SW Q665 2SA1037AK SEG1 SW Q664 KRC103SRTK R674_1 SEG2 SW 1/4W Q663 KRC103SRTK R673_1 SEG3 SW 180 1/4W 5G SW Q662 Q651 2SA1037AK KRC103SRTK R672_1 2G SW 180 1/4W SEG10 SW Q661 Q652 2SA1037AK KRC103SRTK...
  • Page 141 TUNER SCHEMATIC DIAGRAM (SYSCON PCB) TU6001 TCMN0682PA13D(3) REAR OUT JACK J4201 R6006 RF_CONV_A.OUT MSP-213V1-432 PBSN A.IN RF_CH_SW VIDEO OUT W844 TP4201 TV/VCR CONTROL R6004 V.IN 1/4W RF AGC R4212 AUDIO_OUT-R C4209 R4206 W804 AUDIO_OUT-L IIC_CLK_A R4201 R4207 CLOCK MUTE SW AT+5.2V Q4204 MUTE SW...
  • Page 142 HI-FI/DEMODULATOR SCHEMATIC DIAGRAM (SYSCON PCB) C5514 0.1 F C5521 R5519 3.3K 1/4W 0.22 FROM/TO TUNER FRONT_A_IN-R FRONT_A_IN-L HI-FI/AUDIO/HEAD AMP/DEM IC IC5501 AUDIO_OUT-R R5513 AN3663FBP AUDIO_OUT-L 2.2M RF_CONV_A.OUT C5506 C5540 0.015 B DEM_BLK ZZ-PROM PILOT LOGIC TUNER_A C5501 C5517 C5507 INPUT MUTE VCO-F0 75uS HI-FI ENV.
  • Page 143 INTERCONNECTION DIAGRAM HALL MAIN ROTOR FULL ERASE HEAD ASS’Y SENSOR COIL MAGNET LOADING MOTOR FG SENSOR H5002 M101 OPERATION PCB HALL HALL SWITCH PCB270 LOGIC VEA958 CP1001 CAP_FG CAP_VCO VCC(5V) AC120V_60Hz CAP/M/F/R CD501 I_LIMIT MOTOR_GND WHITE S502 CYL/LAD_VCO BLACK CAP_CTL S501 LDM_CTL CAPSTAN DD UNIT...

  • Page 144: Y/C/Audio/Ccd/Head Amp

    WAVEFORMS Y/C/AUDIO/CCD/HEAD AMP SYSCON/SERVO 1 POWER ON 6 POWER ON 11 POWER ON 10µs 500mV/div 5ms 1.0V/div 50ns 1.0V/div 2 POWER ON 7 PB 12 FF/REW 100ns 100mV/div 2µs 1.0V/div 5ms 2V/div 3 PB 8 POWER ON 14 POWER OFF 1ms 100mV/div 500µs 1.0V/div 5ms 2V/div...

  • Page 145: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW J4201 TU6001 J4203 PCB010 (SYSCON PCB) J4204 T501 J4205 PCB270 (OPERATION PCB) I1-1...

  • Page 146: Chassis Exploded Views

    CHASSIS EXPLODED VIEW (TOP VIEW) M2003 UN4001 H5002 H5001 M101 NOTE: Applying positions AA, AB, AC and AD for the CLASS PART NO. MARK grease are displayed for this section. GREASE G-555G Check if the correct grease is applied for each position.
  • Page 147 CHASSIS EXPLODED VIEW (BOTTOM VIEW) M2001 NOTE: Applying positions AA, AB, AC and AD for the CLASS PART NO. MARK grease are displayed for this section. GREASE G-555G Check if the correct grease is applied for each position. MG-33 FG-84M FL-721 I2-2...

  • Page 148: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A4F223B720 CABINET,FRONT ASSY 701WPJB398 CABINET,FRONT 711WPA0107 PLATE,DISPLAY 712WPJB128 FLAP 743WKA0032 SPRING,FLAP(COMBO) 735WPD0731 BUTTON,FRAME 800WFA0045 CUSHION,LEG 701WPA0686 HOLDER,DECK 723000A698 SHEET,DISPLAY 735WPD0730 BUTTON,DECK 735WPAA194 HOLDER,CHANNEL 701WPA0680 HOLDER,DECK 755WPA0020 PLATE,COVER POWER 85OP700036 HOLDER EOT SENSOR 702WSA0084 PLATE,BOTTOM 85OP700037...

  • Page 149: Chassis Replacement Parts List

    CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION A4F201A420K DECK ASSY A4F201A420K 8107226804 SCREW,TAP TITE(S) BIND 2.6x8 8107226504 SCREW,TAP TITE(S) BIND 2.6x5 85OA400234 PINCH ROLLER BLOCK 8107226404 SCREW,TAP TITE(S) BIND 2.6x4 85OA500026 AHC ASS'Y 8102120604 SCREW,PAN M2x6...

  • Page 150: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS TRANSISTORS ! R502 R0G3K2335K RC 3.3M OHM 1/2W Q4001 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) ! R512 R002T2333J RC 33K OHM 1/2W Q4002 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) ! R514 R3X181010J R,METAL OXIDE OHM 1W Q4003...
  • Page 151 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 J3-2...
  • Page 152 SPEC.NO. M4F2-23B O/R NO. K214008...
  • Page 153 MVR4041 SERVICE MANUAL VIDEO CASSETTE RECORDER REVISION 1 MFR’S VERSION B MFR’S VERSION IC4001 LA71200M-MPB LA71201M-MPB Please file this revision with the original version.
  • Page 154 Change of IC ELECTRICAL REPLACEMENT PARTS LIST MFR'S VERSION A MFR'S VERSION B PART NO. DESCRIPTION PART NO. DESCRIPTION REF. NO. IC4001 I03F3200M0 IC LA71200M-MPB I03F3201M0 IC LA71201M-MPB R4013 R903N8562J RC 5.6K OHM 1/8W R903N8682J RC 6.8K OHM 1/8W R4021 R903N8223J RC 22K OHM 1/8W R903N8183J RC...
  • Page 155 MVR4041 Series A SERVICE MANUAL VIDEO CASSETTE RECORDER REVISION 1 MFR’S VERSION B PRODUCT MFR’S VERSION TU6001 IMPROVEMENT TCMN0682PA13D ORIGINAL Change of TAPE EJECT TCMN0682PA13D(3) TIMMING Please file this revision with the original version.
  • Page 156 CHASSIS REPLACEMENT PARTS LIST Change of TAPE EJECT TIMMING MFR'S VERSION A MFR'S VERSION B PART NO. DESCRIPTION PART NO. DESCRIPTION REF. NO. 85OP900743 LEVER,LINK 85OP900750 LEVER,LINK 2 ELECTRICAL REPLACEMENT PARTS LIST Change of TUNER MFR'S VERSION A MFR'S VERSION B PART NO.
  • Page 157 SPEC.NO. M4F2-04B O/R NO. K1Z4014...

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