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Memorex MVT2195B Service Manual

Color television/video cassette recorder
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MVT2195B
SERVICE MANUAL
COLOR TELEVISION/VIDEO CASSETTE RECORDER
ORIGINAL
MFR'S VERSION A
Design and specifications are subject to change without notice.

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  • Page 1 MVT2195B SERVICE MANUAL COLOR TELEVISION/VIDEO CASSETTE RECORDER ORIGINAL MFR’S VERSION A Design and specifications are subject to change without notice.
  • Page 2 MVT2195B SERVICE MANUAL COLOR TELEVISION/VIDEO CASSETTE RECORDER REVISION 1 MFR’S VERSION C M2003 IC1001 MFR’S VERSION EP14BD OEC7043A F20EL82 OEC7043B Please file this revision with the original version.
  • Page 3 Change of MICRO MOTOR DIFFERENCES MFR'S VERSION A MFR'S VERSION C PART NO. DESCRIPTION PART NO. DESCRIPTION REF. NO. M2003 1589V11007 MICRO MOTOR EP14BD 1589311005 MICRO MOTOR F20EL82 MFR'S VERSION A MFR'S VERSION C PART NO. DESCRIPTION PART NO. DESCRIPTION REF.
  • Page 4 WAVEFORMS Y/C/AUDIO/HEAD AMP 11 PB POWER ON 0.5V 20µs/div 0.5V 0.5ms/div 0.5V 10ms/div 12 PB POWER ON POWER ON 1.0V 5ms/div 100mV 0.1µs/div 1.0V 10µs/div POWER 13 5.0V 20ms/div 10mV 20us/div 1.0V 10ms/div 14 500mV 5µs/div 10.0V 5us/div 1.0V 5ms/div DEFLECTION MICON 10 PB...
  • Page 5 WAVEFORMS 10.0V 5ms/div 50.0V 20µs/div 17 2.0V 20µs/div 18 200mV 20µs/div 19 50.0V 20µs/div 20 50.0V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 6 MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L503 V801 PCB030 (OPERATION PCB) SP351...
  • Page 7 MECHANICAL EXPLODED VIEW TU601 FB401 PCB010 (SYSCON PCB)
  • Page 8 CHASSIS EXPLODED VIEW (TOP VIEW) M2003 UN4001 H5001 H5002 M101 PCB550 (DECK PCB ASS'Y) NOTE: Applying positions AA, AB, AC, AD and BA for CLASS PART NO. MARK the grease or oil are displayed for this section. G-555G GREASE Check if the correct grease or oil is applied for G-488M each position.
  • Page 9 CHASSIS EXPLODED VIEW (BOTTOM VIEW) M2001 NOTE: Applying positions AA, AB, AC, AD and BA for CLASS PART NO. MARK the grease or oil are displayed for this section. GREASE G-555G Check if the correct grease or oil is applied for each position.
  • Page 10 MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A546A5A720 CABINET,FRONT ASS'Y 701WPJA839 CABINET,FRONT 711WPA0114 PLATE,FRONT 712WPJ0621 FLAP 713WPA0075 GUIDE,REMOCON 735WPJ0114 BUTTON,FRAME 735WPA0402 BUTTON,REC 743WKA0032 SPRING,FLAP 7230006830 SHEET,LED 7260000323 SHEET,CRT SERVICEMAN 753WSA0123 PLATE,SPEAKER 800WFA0005 CUSHION 10x15 800WQ00048 FELT,SHEET 75x75 741WUA0019 SPRING,EARTH HEAT SINK HEAT SINK METAL SPACER...
  • Page 11 CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION A545A0A420A DECK ASSY A545A0A420A 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 12 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS DIODES ! R415 R426T22R2F R, METAL 2.2 OHM 1/2W ! D507 D28015DF60 DIODE, SILICON 15DF6 ! R420 R801R7822F RC 8.2K OHM 1/10W ! D509 D28T21DQN9 DIODE, SCHOTTKY 21DQ09N-TA2B1 ! R422 R3X10A4R7J R, METAL...
  • Page 13 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS TRANSISTORS D4005 D97U06R81B DIODE, ZENER MTZJ6.8B T-77 Q4011 TNYJD05001 COMPOUND TRANSISTOR DTC144EKAT146 D94TA6RB12 DIODE, ZENER HZ6B2L TD Q4204 TNYJB05001 COMPOUND TRANSISTOR DTC114EKAT146 COILS &TRANSFORMERS D94TA7RA12 DIODE, ZENER HZ7A2L TD D94TA7RB11 DIODE, ZENER HZ7B1L TD...
  • Page 14 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION MISCELLANEOUS ! CP501 0697320039 CORD, UX CONNECTOR THL-P03P-B1 ! CP502 069W420029 CONNECTOR PCB SIDE TV-50P-02-A1 CP757 06942A0139 CONNECTOR PCB SIDE 1-173979-0 CP801 069W320018 CONNECTOR PCB SIDE TS-80P-02-V1 CD1001 122L040904 CORD, JUMPER 2L040904 CD1002 122F051702 CORD, JUMPER...
  • Page 15 M546-A5A SPEC.NO. W045012 O/R NO.
  • Page 16 TV BLOCK DIAGRAM MICON/ OPERATION/ V. OUTPUT IC THERMAL DECK IC401 PROTECTION Q602, Q603 Q606 LA78040 P. CON + 8V AT + 5V REG. REG. AT + 25V PUMP Q604, Q605 TU_AUDIO Y/C/AUDIO/ AT + 5V REG. TU_VIDEO HEAD AMP/ Y/C_AUDIO IN/OUT Q405...
  • Page 17 Y/C/AUDIO/HEAD AMP/IN/OUT BLOCK DIAGRAM X4001 3.579545MHz Q4009 Y/C/AUDIO/CCD/HEAD BUFFER AMP IC IC4001 LA71067M-MPB PULL SP/LP/EP-H VX01 MICON/ TIMMING CLAMP INPUT_SEL DRIVER OPERATION/ TRICK_PB-H/EE-H DECK H.SW DETAL FM-EQ EMPHA DOC_XO_CTL CLAMP CONV C-LPF Y-LPF Q4011 TRICK PB CP4001 H.AMP YNR/ Main 3.58M B-UP COMB...
  • Page 18 MICON/OPERATION/DECK BLOCK DIAGRAM SW1001 TIMER SYSCON MICON IC IC1001 OEC7043A SYSTEM RESET IC RESET-L 3 OUT IC1002 TAB SW PST600H POWER FAIL AT + 5V POWER_FAIL_L MSSEN-A P. CON + 5V X-OUT (12MHz) Q1023 MS_SEN A X1001 J701 Q1009 12MHz AUDIO L X_RAY_SW X-IN (12MHz)
  • Page 19 PRINTED CIRCUIT BOARDS OPERATION SOLDER SIDE SW797 SW799 SW794 SW791 SW792 SW793 SW795 J351 W003 C701 R777 W805 R772 R773 W811 R766 R774 R771 W802 OS753 R350_1 W815 SW798 D792 R778 SW796 C755_1 CD351_1 CD757 D793 D791 DECK SOLDER SIDE S101 S105 S106...
  • Page 20 PRINTED CIRCUIT BOARDS SYSCON/CRT (INSERTED PARTS) SOLDER SIDE W813 CP1006 R450_2 L801 W142 R454 D1005 S801 W164 W122 FB401 R820 W166 C430_1 R686 Q806_1 W118 C1064 TP802 W041 R678 TP801 TP803 C819_1 W892 D618 W814 W206 W344 W131 W216 W332 D612 Q805_1 Q804_1...
  • Page 21 PRINTED CIRCUIT BOARDS SYSCON/CRT (CHIP MOUNTED PARTS) SOLDER SIDE TO SHIELD COVER H/AMP C1024 C1033 C1005 C4204 R352 C301 R4201 R4053 Q4204 Q1008 Q1007 W801 C353 Q612 C617 C4083 Q4011 R4014 C4080 R4060 C4028 C4036 C4044 C4055 R1046 R4046 Q4009 R1047 R4057 C4032...
  • Page 22 Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) L4002 TRICK PB SWITCH 100uH 0305 Q4011 DTC144EKA W896 L4008 S103X S103Y W836 FROM POWER 100uH 0305 W826 P.CON+5V FROM/TO IN/OUT R4070 R4053 TO SHIELD COVER HEAD AMP 10M 1/4W 6.8K FRONT_AUDIO FRONT_VIDEO R4014 S008 Y/C_AUDIO TP4001...
  • Page 23 MICON SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO POWER DEGAUSS_H SERVICE R1032 TP1001 POWER_FAIL C1041 P.CON+5V C1044 AT+12V MOTOR_GND 220P CH C1034 C1045 TV_POWER_H FROM/TO Y/C/AUDIO/HEAD AMP R1029 220P CH C1035 H.SW 4.7K 200P CH DOC_XO_CTL REC/EE/PB SP/LP/EP-H C1031 LOADING MOTOR DRIVER IC IC1003 BA6955AN 0.001 B...
  • Page 24 IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO SOUND AMP SOUND_GND SOUND+ SP_OUT FROM CHROMA/IF AT+5V FROM/TO MICON INT-MONI B.OUT IIC_OFF T-REC_LED T-REC LED SW REC_LED TV POWER SW Q1008 REC LED SW Q4204 DTC114EKA Q1007 DTC114EKA DTC114EK FROM POWER P.CON+5V W889 KEY_B W881 KEY_A...
  • Page 25 CHROMA/IF SCHEMATIC DIAGRAM (SYSCON PCB) 11.0 REG. R632 FROM/TO MICON Q606 220 2W AT+5V REG. 2SD863 Q603 AT+5V 2SC2120Y AT+5V_BACKUP REG. REG. REG. Q605 Q602 Q604 2SD400E OSD_R 2SC2120Y 2SD400E OSD_G OSD_B W876 R629 L610 OSD_BLK R662 W894 56uH TU_VIDEO FROM/TO Y/C/AUDIO/HEAD AMP C648 AFT_M...
  • Page 26 SOUND AMP SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO IN/OUT SP_OUT SOUND+ SOUND_GND (S802) FROM MICON TV_A_MUTE TV_POWER_H FROM CHROMA/IF AUDIO_OUT R359 C301 0.0047 R353 FROM POWER SOUND+B W803 SOUND_GND TO CHROMA/IF C355 R357 S107X 5.6K AUDIO SIGNAL(REC) PCB010 VMX180 NOTE: THE DC VOLTAGE AT EACH PART WAS CAUTION: SINCE THESE PARTS MARKED BY ATTENTION:...
  • Page 27 POWER SCHEMATIC DIAGRAM (SYSCON PCB) 5A 125V 2.5A 250V 4A 125V CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE 5A 125V (F501,ICP501,ICP502,ICP503),2.5A 250V(F502), AND 4A 125V(ICP505). ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME TYPE 5A 125V (F501,ICP501,ICP502,ICP503),2.5A 250V(F502),...
  • Page 28 DEFLECTION SCHEMATIC DIAGRAM (SYSCON PCB) V.OUTPUT IC IC401 LA78040 THERMAL PROTECTION PUMP UP 25.9 12.5 26.3 DRIVER Q402 2SB892 26.0 26.0 25.0 TO DY R401 CP401 B05B-DVS W857 W837 R413 R416 FROM MICON 3.3K TV_POWER_H SWITCHING Q401 W838 DTC143EKA W897 FROM/TO CHROMA/IF V_OUT HS401_1...
  • Page 29 CRT SCHEMATIC DIAGRAM (SYSCON PCB) TP801 R802 BLUE AMP Q804_1 132.5 15K 2W 2SC4217 R807 2.7K 1/4W 104.1 132.5 132.8 FROM CHROMA/IF CP851B (CP851A) J801 51048-1000 CVT3275-5102 R811 CUT_OFF 4.7K CUT_OFF TP802 G.OUT G.OUT B.OUT B.OUT C809_1 R805 GREEN AMP R.OUT S001Y R.OUT...
  • Page 30 OPERATION SCHEMATIC DIAGRAM (OPERATION PCB) W802 OS753 PIC-28143TH5 R766 10 1/4W Vout R778 R771 R772 R773 R774 1.5K 2.7K 5.6K R775 R776 R777 1.5K FROM/TO IN/OUT CD757 (CP757) HEADPHONE_JACK CH2A019A J351 HSJ2630-010070 REMOCON_IN AT+5V POWER_ON_L R350_1 W815 R351 1/4W KEY_A W805 22 1/4W T-REC_LED...
  • Page 31 DECK SCHEMATIC DIAGRAM (DECK PCB) LOADING MOTOR M101 S105 BOT SENSOR S106 Q101 RPT-38PB113 S101 S102 S103 S104 FROM/TO MICON CP101 52044-0445 LDM+ LDM- PCB550 VE8851 CAUTION: SINCE THESE PARTS MARKED BY ATTENTION: LES PIECES REPAREES PAR UN ETANT NOTE: NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME THE DC VOLTAGE AT EACH PART WAS CRITICAL FOR SAFETY,USE ONES...
  • Page 32 INTERCONNECTION DIAGRAM HEADPHONE JACK J351 COMMAND TRANSMITTER TM101 FRONT AV JACK OS753 FROM J701 TM101 OS753 Vout HALL MAIN ROTOR SENSOR COIL MAGNET FG SENSOR SPEAKER CD352 SP + OPERATION PCB PCB030 SP - TEXA28 SP351 8 OHM L005 HALL HALL SWITCH LOGIC...

  • Page 33: 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 34: 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, B1-2 2. REMOVAL OF DECK PARTS .................... B2-1~B2-5 3.

  • Page 35: General Specifications

    GENERAL SPECIFICATIONS G-1.Outline of the Product inch(480.0mmV):Measured diagonally Color CRT 90 degree deflection -Speed 1/2" Video Cassette Recorder Recorder/Player VHS-C Player G-2.VCR Format VHS Standard NTSC SECAM PAL-M PAL-N VHS Hi-Fi Audio System G-3.Video Recording System :Rotary, slant azimuth two head helical scan system Luminance Component :FM recording Chrominance Component...
  • Page 36 GENERAL SPECIFICATIONS G-17.Tuner and Receiving channel 1Tuner System 2Tuner System Tuner : Contactless Electric tuner Oscar(W/O HYPER) Oscar(W/ HYPER) France CATV) Others Channel Coverage 2 ~ 69 , A-5 ~ A-1 , A ~ I , J ~ W , W+1~ W+84 Tuning System Frequency syn.
  • Page 37 GENERAL SPECIFICATIONS G-26.Power Consumption: 86 W at AC -- W at DC V(at TV and VCR ON) Stand by: 5 W at AC Per Year: kWh / Year G-27.Dimensions(Approx.) 489 mm(W) 462.5 mm(D) 479.5 mm(H) G-28.Weight(Approx.) 22.0 Kg ( 48.7 lbs) Gross: 25.0 Kg ( 55.3 lbs) G-29.Cabinet Material...
  • Page 38 GENERAL SPECIFICATIONS G-38.Terminals VHF/UHF Antenna Input Din Type F-Type France Type Front Video Input (RCA ø8.3) Front Audio Input (RCA ø8.3) Rear Video Input (RCA ø8.3) Rear Audio Input (RCA ø8.3) Rear Video Output (RCA ø8.3) Rear Audio Output (RCA ø8.3) 21 Pin DC Jack 12V (Center + ) AC Inlet...
  • Page 39 GENERAL SPECIFICATIONS G-44.Carton Master Carton: Need No Need Content: ---- Material: ---- / ---- Corrugated Carton Dimensions: ---- mm(W) ---- mm(D) ---- mm(H) Description of Original Gift Box : Material Double/Brown Corrugated Carton ( with Photo Label) Double/White Corrugated Carton ( with Photo Label) Double Full Color Carton W/Photo Dimensions:...
  • Page 40 GENERAL SPECIFICATIONS G-49.Remote Control Unit: RC-CG Glow in Dark Remocon Power Source: Battery UM - 4 x 2 Control Key: Total Ch Up Power Ch Down Eject Volume Up Play Volume Down Stop Input Select F.FWD Audio Select TV/VCR Timer Rec Pause/Still REC/OTR Slow...

  • Page 41: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS CRT PCB AND P.C. BOARDS Front Cabinet 1-1: BACK CABINET (Refer to Fig. 1-1) Remove the 6 screws 1. Remove the screw 2 which are used for holding the Back Cabinet. Remove the AC cord from the AC cord hook 3. Remove the Back Cabinet in the direction of arrow.
  • Page 42 DISASSEMBLY INSTRUCTIONS 1-4: DECK SHIELD PLATE, DECK CHASSIS AND 1-5: SYSCON PCB (Refer to Fig. 1-5) BOTTOM SHIELD (Refer to Fig. 1-4) Remove the screw 1. Remove the 3 screws 1. Remove the Syscon PCB in the direction of arrow. Remove the 3 screws 2.

  • Page 43: 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 44 DISASSEMBLY INSTRUCTIONS 2-6: LINK ASS'Y (Refer to Fig. 2-6) 2-9: TENSION ASS'Y (Refer to Fig. 2-9-A) Set the Link Ass'y to the Eject position. Move the Inclined S Ass'y to the back side. Remove the (A) side of the Link Ass'y first, then remove Remove the Tension Spring.
  • Page 45 DISASSEMBLY INSTRUCTIONS 2-11: S REEL/T REEL (Refer to Fig. 2-11) 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 46 DISASSEMBLY INSTRUCTIONS 2-15: AHC ASS'Y/CYLINDER UNIT ASS'Y (Refer to Fig. 2-15) 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 47 DISASSEMBLY INSTRUCTIONS 2-19: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-19-A) 2. When you install the Clutch Actuator, install as shown in the circle of Fig. 2-19-C. (Refer to Fig. 2-19-C) Remove the E-Ring 1 and remove the Main Loading Gear.

  • Page 48: 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 49: 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 50 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 51: 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 52: 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 53 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 54: 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 55: 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 56: 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 57 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 58 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 59 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 60: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. 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 pin 4 of CP1003.
  • Page 61 ELECTRICAL ADJUSTMENTS 2-3: RF AGC 2-8: HORIZONTAL PHASE Receive a 70dB monoscope pattern. Receive the center cross signal from the Pattern Connect the digital voltmeter between the pin 5 of Generator. CP351 and the pin 1 (GND) of CP351. Activate the adjustment mode display of Fig. 1-1 and Activate the adjustment mode display of Fig.
  • Page 62 ELECTRICAL ADJUSTMENTS 2-13: SUB TINT 2-15: OSD HORIZONTAL Receive the color bar pattern. (RF Input) Activate the adjustment mode display of Fig. 1-1. Connect the synchro scope to TP803. Press the VOL. UP/DOWN button on the remote Activate the adjustment mode display of Fig. 1-1 and control until the difference of A and B becomes press the channel button (16) on the remote control to minimum.

  • Page 63: Crt

    ELECTRICAL ADJUSTMENTS 3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE TP1001 CP1003 TP1002 TP4001 FH503 VR502 TU001 FB401 CP351 FOCUS VOLUME SCREEN VOLUME SYSCON TP801 TP803 J801 D2-4...
  • Page 64 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.

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