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Memorex MVT2137 Service Manual

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See also: Owner's Manual
MVT2137
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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Summary of Contents for Memorex MVT2137

  • Page 1 MVT2137 SERVICE MANUAL COLOR TELEVISION/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 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 directions to wind the Video Tape in the Cassette Case.

  • Page 4: Table Of Contents

    CONTENTS SERVICING NOTICES ON CHECKING .................. A1-1 HOW TO ORDER PARTS ....................... A1-1 TAPE REMOVAL METHOD AT NO POWER SUPPLY ............A1-2 CONTENTS ..........................A2-1 GENERAL SPECIFICATIONS ....................A3-1~A3-4 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 13 inch / 335.4mmV System CRT Type Normal Deflection degree Magnetic Field BV/BH +0.45G / 0.18G Color System NTSC Speaker 1Speaker Position Front Size x 2.5 Inch Impedance Sound Output 10%(Typical) System Player / Recorder System Video System NTSC...
  • Page 6 GENERAL SPECIFICATIONS 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 Language Auto Clock On/Off Standard Time Daylight Saving Time Commercial Advance Marking On/Off Blueback On/Off...
  • Page 7 GENERAL SPECIFICATIONS CH Up CH Down Volume Up Volume Down Input Select Play F.Fwd Pause/Still 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/Caption/Text Sleep Timer Muting Zero Return CM Skip...
  • Page 8 GENERAL SPECIFICATIONS Antenna Change Plug DC Car Cord (Center+) AC Plug Adapter AC Cord AV Cord (2Pin-1Pin) Guarantee Card Registration Card ESP Card Warning Sheet Dew/AHC Caution Sheet Quick Set-up Sheet Circuit Diagram Service Facility List Important Safeguard G-15 Interface Switch Power Play...

  • Page 9: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 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) (CP2201, CP4202, CP401 and CP403). Remove the 4 screws (1). Unlock the support 2.
  • Page 10 DISASSEMBLY INSTRUCTIONS 1-5: JDECK SHIELD PLATE AND BOTTOM SHIELD 1-7: JACK PLATE AND SYSCON PCB (Refer to Fig. 1-7) (Refer to Fig. 1-5) Remove the screw (1). Remove the 2 screws (1). Remove the Syscon PCB in the direction of arrow (A). Remove the screw (2).

  • Page 11: 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 12 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 13 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 14 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 15 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 16 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 Ass'y, Loading Arm T Ass'y and Main Loading Gear, align each Remove the P4 Cap. marker. (Refer to Fig. 2-16-B) Unlock the support (1) and remove the Cassette Guide Post.

  • Page 17: 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 18: 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 19 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 20: 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 21 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 22: 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 23: 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 24 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 25: 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 or alternatively, discharge backup capacitor.

  • Page 26: 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 (VN S-LI6 ) JG001 JG001B (VN S-LI6 ) (10~90gf•cm) Part No. SV-TG0-030-000 JG001A (VN S-CO1 ) JG001I...

  • Page 27: Preparation For Servicing

    PREPARATION FOR SERVICING How to use the Servicing Fixture Unplug the connector CP2201, CP4202, CP502, CP820 and CP850, then remove the VCR Block from the set. Connect as shown in the below figure using the Service Fixture. • Connect the Syscon PCB to the Main PCB with the cable JG162D and JG162E. •...

  • 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) Replacement Part Check item 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 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 J4202.
  • Page 33 ELECTRICAL ADJUSTMENTS 2-3: RF AGC 2-8: SUB BRIGHTNESS Receive a 63dB monoscope pattern. Receive the monoscope pattern. (RF Input) Connect the digital voltmeter between the pin 5 of Using the remote control, set the brightness and CP602 and the pin 1 (GND) of CP602. contrast to normal position.
  • Page 34 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 oscilloscope to TP803 (R810). Press the VOL. UP/DOWN button on the remote control Using the remote control, set the brightness, contrast, until the difference of A and B becomes minimum.
  • Page 35 ELECTRICAL ADJUSTMENTS 2-20: COLOR LEVEL Receive the color bar pattern. (RF Input) Connect the oscilloscope to TP4201. When setting to the Y-LEVEL 100%, check if the MAGENTA is 45 ± 10%. (Refer to Fig. 2-6) 100% Magenta Fig. 2-6 D3-4...
  • Page 36 ELECTRICAL ADJUSTMENTS 3-3: STATIC CONVERGENCE 3. PURITY AND 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) MAIN PCB CP820 CP803A CP502 FB401_1 T502_1 VR501 VR502 CRT PCB FH503 FH504 T501 F502 CP850 CP803B VR402 VR401 CP402 S501 L508 S502 CD601 CD502 AC IN CP602_1 J4202 CP601_1 CP4002 CP605 DEW SENSOR...
  • Page 38 TV BLOCK DIAGRAM V. OUTPUT IC IC401 AN5522 THERMAL PROTECTION PUMP 8.7VREF AT+13V Q601 TU_AUDIO Q607 5.7VREF(P.C0N) Y/C/AUDIO/CCD/ TU_VIDEO BUFFER HEAD AMP MONITOR_A BUFFER Q405 Q406 CHROMA/IF IC IC601 M61206FP H. OUTPUT H-DRIVE 33 39 AUDIO OUT FB401 RF AGC OUT TU601 VIF IN SAW FILTER...

  • Page 39: Y/C/Audio/Ccd/Head Amp

    Y/C/AUDIO/CCD/HEAD AMP BLOCK DIAGRAM X4001 3.579545MHz Q4010 Q4012 BUFFER BUFFER Y/C/AUDIO/CCD/HEAD AMP IC IC4001 LA71205M-MPB VX01 TIMMING DRIVER 3.58M BPF2 CLAMP CP4001 AUTO-BIAS CLAMP Main CONV Y/C_CLK MICON/ SP-CH2 (L) SERAIL Y/C_DATA IN/OUT/ DECODER SP_COM OPERATION B-UP Y/C_CS SP-CH1 (R) C-LPF 3.58M BPF1...
  • Page 40 MICON/IN/OUT/OPERATION BLOCK DIAGRAM TIMER SYSCON MICON IC IC1001 OEC7071A SW1001 SYSTEM RESET IC RESET-L 1 OUT TAB SW IC1002 R3111N311A/C POWER FAIL(DC) POWER_FAIL_L J701 MSSEN-A P. CON+5V X-OUT(12MHz) MS_SEN A X1001 FRONT_A_IN_L Q1009 12MHz X-IN(12MHz) FRONT_V_IN XC-OUT(32KHz) MSSEN-B X1002 MS_SEN B 32.768KHz XC-IN(32MHz) Q1003...

  • Page 41: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS OPERATION SOLDER SIDE SW794 SW751 SW791 C382_1 SW792 SW793 SW795 SW799 W811 SW797 R773_1 R772_1 R351_1 R774_1 SW796 R766 CD352 R771_1 OS753 J351 W004 W002 W802 CD351_1 R350 SW798 W005 CD757 W001 C755_1 C751...

  • Page 42: Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT SOLDER SIDE CP820 W040 W831 CP803A CP502 S804Y C514 D505 D518 D515 W020 Q501 W019 ICP502 C542 C511 W842 R523 D516 T502_1 D524 D550 D537_1 VR501 R423 W001 D523 R527 Q514 W823 D521 Q516 HS504 Q503 S804X W029 W824...

  • Page 43: Syscon

    PRINTED CIRCUIT BOARDS SYSCON (INSERTED PARTS) SOLDER SIDE CD601 CP2201_2 R668 R1059 W270 IC603 HS603_1 W011 W996 S108X S109Y R669 W082 CP601_1 W009 W081 C684 Q605 Q610 D4201 W080 R695 TU601 W078 C610 W076 C612 W075 W072 W168 Q606 W006 W860 W068 W004...
  • Page 44 PRINTED CIRCUIT BOARDS SYSCON (CHIP MOUNTED PARTS) SOLDER SIDE R4201 C4218 C4221 C4204 Q350 Q651 R657 C698 W985 R4039 C4022 C4066 W393 C4064 R4012_1 R4042 C633 R4041 C657 C651 C656 R670 Q4012 R4038 R678 Q4010 R4011 C4028 C4077 R4017 C4054 R666 R4018 C4037...
  • Page 45 Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM (SYSCON PCB) BUFFER Q4012 2SC2412K R4041 1.8K FROM/TO IN/OUT FROM POWER MONITOR_A FRONT_V_IN P.CON+5V FRONT_A_IN_L REAR_V_IN (S801) REAR_A_IN_L VIDEO_OUT W988 C4058 C4059 6.3V R4038 0.1 B C4061 FROM/TO MICON 680K 0.01 Y/C/AUDIO/CCD/HEAD AMP IC C4078 Y/C_CLK IC4001 Y/C_DATA LA71205M-MPB...

  • Page 46: Y/C/Audio/Ccd/Head Amp

    MICON SCHEMATIC DIAGRAM (SYSCON PCB) FROM POWER W874 R1004 AT+5V[BACKUP] AT+5V[UCON] C1056 C1045 100P P.CON+5V W871 C1044 W823 AT+12V C1065 100P W860 C1009 MOTOR_GND W993 CAP_VCO POWER_FAIL BUFFER 220P CH C1034 SERVICE Q1008 X-RAY_STOP TP1001 2SA1037AK FROM/TO Y/C/AUDIO/CCD/HEAD AMP C1028 POWER_FAIL[DC] C1023 C1035...
  • Page 47 POWER SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO TV POWER CP601_1 (CD502) 003P-2100 TO Y/C/AUDIO/CCD/HEAD AMP P.CON+5V 12.6 REG. FROM/TO DEFLECTION Q608 2SC13840W CD601 (CP402) CH01006A REG. Q606 2SC13840W D610 REG. TO MICON Q605 SB140-EIC 2SC13840W AT+12V R690 MOTOR_GND AT+5V[UCON] 1K 1/2W D611 AT+5V[BACKUP] SB140-EIC...
  • Page 48 IN/OUT SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO SOUND AMP C4201 SOUND_GND 0.01 B SOUND_L+ SP_OUT_L C4205 0.01 B W908 FRONT_A_IN_L REC LED SW W842 W828 FRONT_V_IN Q4205 KRC102SRTK (W205) (W239) T-REC LED SW REC_LED Q4206 KRC102SRTK FROM POWER AT+5V[UCON] P.CON+9V TV POWER LED SW Q4204 W883 TV_POWER_H...

  • Page 49: Chroma/If

    CHROMA/IF SCHEMATIC DIAGRAM (SYSCON PCB) FROM/TO MICON DEGAUSS_H L610_2 POWER_FAIL FROM/TO Y/C/AUDIO/CCD/HEAD AMP OSD_R 100uH OSD_G R654 OSD_B MONITOR_A OSD_BLK R616 820 1/4W TU1_AUDIO AFT_M TU1_VIDEO VCR_POWER_H R620 TV_POWER_H CF604 X_RAY_TEST BUFFER EFCT4R5MW5 C648 PROTECT Q601 TO SOUND AMP H_CONTROL 2SA1037AK IIC_OFF SOUND+B...

  • Page 50: Sound Amp

    SOUND AMP SCHEMATIC DIAGRAM (SYSCON PCB) SOUND AMP IC IC351 AN7523 R357 100K 1/4W HS353 763WSA0021 C358 S107X FROM/TO IN/OUT FROM CHROMA/IF W951 SP_OUT_L B301 SOUND+B SOUND_L+ W5RH3.5X5X1.0 W944 AUDIO_OUT SOUND_GND SOUND_GND FROM MICON R353 TV_POWER_H R359 68K 1/4W TV_A_MUTE 47K 1/4W MUTE SW Q350...

  • Page 51: Hi-Fi

    HI-FI SCHEMATIC DIAGRAM (SYSCON PCB) FROM POWER P.CON+5V PCB010 VMA245 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE G-13 G-14...
  • Page 52 IF SCHEMATIC DIAGRAM (SYSCON PCB) TO CHROMA/IF MONITOR_V TO Y/C/AUDIO/CCD/HEAD AMP VIDEO_OUT TO IN/OUT VIDEO_OUT VIDEO_OUT TUNER VIDEO SIGNAL PCB010 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME VMA245 OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE G-15 G-16...

  • Page 53: Tv Power

    TV POWER SCHEMATIC DIAGRAM +5V_REG IC IC501 KIA7805API DC JACK J503 (MAIN PCB) HEC0824-010010 RY503 5A 125V 2.5A 125V 10A 125V ALKS325 D550 CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, MTZJ6.8B REPLACE ONLY WITH THE SAME TYPE FUSE 5A 125V (F501),2.5A 125V(F502) AND 10A 125V(ICP502).

  • Page 54: Deflection

    DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) CP403 A1561WV2-2P DEGAUSS COIL L508 V.OUTPUT IC IC401 AN5522 8R140024 W888 THERMAL PROTECTION W841 TO DY PUMP UP CP401_1 A1561WV2-A5P DEGAUSE SW Q401 26.3 12.5 25.9 KRA102MAT W886 W884 TO CRT CD801_1 SM1098-009-1A R431 V801 390 1/4W A34JXV70X53N45 R413...

  • Page 55: Crt

    CRT SCHEMATIC DIAGRAM (CRT PCB) 132.9 104.1 132.8 132.5 TP801 FROM CHROMA/IF R802_1 CP850 (CD805B) J801 52147-0510 HPS3200-010501 15K 2W CUT_OFF G.OUT R807 RED AMP R.OUT Q804_1 2.7K 1/2W B.OUT KTC4217(O,Y) 132.5 R811 330 1/4W C809 TP802 560P B R805_1 15K 2W GREEN AMP Q805_1...
  • Page 56 OPERATION SCHEMATIC DIAGRAM (OPERATION PCB) W802 OS753 PIC-37143TH5 Vout R778_1 R771_1 R772_1 R773_1 R774_1 820 1/4W 1K 1/4W 1.5K 1/4W 2.7K 1/4W 5.6K 1/4W R775_1 R776_1 R777_1 820 1/4W 1K 1/4W 1.5K 1/4W FROM/TO IN/OUT CD757 (CP2201_2) HEADPHONE_JACK CU2A2501 J351 HTJ-035-28A REMOCON_OUT AT+5V...

  • Page 57: Interconnection Diagram

    INTERCONNECTION DIAGRAM HALL MAIN ROTOR CD757 CP2201_2 REMOCON_OUT HEADPHONE JACK SENSOR COIL MAGNET FG SENSOR J351 AT+5V POWER_ON_L KEY_A T-REC_LED REC_LED HALL HALL SWITCH KEY_B LOGIC CP1001 CAP_FG CD351_1 CP4202_1 FRONT_VIDEO_IN CAP_VCO FRONT AV JACK J701_1 FRONT_AUDIO_IN CAP/M/F/R SOUND_GND I LIMIT SOUND_OUT MOTOR_GND SP_OUT...

  • Page 58: Waveforms

    WAVEFORMS Y/C/AUDIO/CCD/HEAD AMP MICON POWER ON 1.0V 5ms/div 0.5V 20µs/div 1.0V 10µs/div DEFLECTION POWER ON POWER ON 17 0.5V 5ms/div 100mV 0.1µs/div 0.5V 10ms/div 9 POWER ON 18 200mV 20µs/div 1.0V 20µs/div 10mV 20us/div 10.0V 5ms/div 0.5V 1ms/div 1.0V 10ms/div 11 PB 20 50.0V 20µs/div 10.0V 5us/div...
  • Page 59 WAVEFORMS 21 50.0V 20µs/div 50.0V 20µs/div CHROMA/IF 100mV 20µs/div 200mV 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 60: Mechanical Exploded Views

    MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB) L508 V801 FB401 PCB070 (MAIN PCB) PCB030 (OPERATION PCB) SP351 113 117 I1-1...
  • Page 61 MECHANICAL EXPLODED VIEW TU601 PCB010 (SYSCON PCB) I1-2...

  • Page 62: Chassis Exploded Views

    CHASSIS EXPLODED VIEW (TOP VIEW) M2003 UN4001 H5002 H5001 D1100 M101 NOTE: Applying positions AA, AB, AC and AD for the gre CLASS PART NO. MARK ase are displayed for this section. GREASE G-555G Check if the correct grease is applied for each po MG-33 sition.
  • Page 63 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 64: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A5A3A9C720 CABINET,FRONT ASSY 752WSAA028 SHIELD BOTTOM 752WSA0230 SHIELD,CASE HEAD AMP 753WSA0118 PLATE,EARTH-SYSCON 85OP700037 HOLDER,LED 761WPAA055 HOLDER,DECK 8995034000 CORD CLIP UL CO. 753WSA0144 PLATE,BOTTOM-EARTH 771WPA0270 PLATE,JACK 726000A023 SHEET,CRT SERVICEMAN 800WFA0038 CUSHION 10x10xT=2 85OP700038 HOLDER,END SENSOR 711WPA0114 PLATE,FRONT 761WPA0223 HOLDER,FBT...

  • Page 65: Chassis Replacement Parts List

    CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION A5A317C420K DECK ASSY A5A317C420K 8107226804 SCREW,TAP TITE(S) BIND 2.6x8 810A123504 SEMS A M2.3x5.0 85OA400234 PINCH ROLLER BLOCK 8107226404 SCREW,TAP TITE(S) BIND 2.6x4 85OA500026 AHC ASS'Y 8102120604 SCREW,PAN M2x6 85OP200290 BELT,CAPSTAN (S) 8109126604 SCREW,TAP TITE(B) PAN...

  • Page 66: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS DIODES ! R404 R4X5T6152F R,METAL 1.5K OHM 1/6W ! D411 D2LTPG06J0 DIODE SILICON RMPG06J-G3 ! R409 R3X181221J R,METAL OXIDE 220 OHM 1W ! D412 D2LTPG06J0 DIODE SILICON RMPG06J-G3 ! R432 R655U2010J R,FUSE...
  • Page 67 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION COILS &TRANSFORMERS IC351 I0FSP7523N IC AN7523N L503 021767100K COIL 10 UH ! IC401 I01TD55220 IC AN5522 ! L508 028R140024 COIL,DEGAUSS 8R140024 ! IC501 I1KA97805A IC KIA7805API L604 02167F101J COIL...
  • Page 68 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION MISCELLANEOUS ! CP403 069S420110 CONNECTOR PCB SIDE A1561WV2-2P CP502 069R2B0589 CONNECTOR PCB SIDE 52147-1110 CP601 069W01001A CONNECTOR PCB SIDE 003P-2100 CP602 069X170379 CONNECTOR PCB SIDE 07JQ-ST CP605 069R220021 CONNECTOR PCB SIDE 52287-0211 CP801 069S320010 CONNECTOR PCB SIDE...
  • Page 69 M5A3-A9C SPEC.NO. K245031 O/R NO.
  • Page 70 MVT2137 SERVICE MANUAL COLOR TELEVISION/VIDEO CASSETTE RECORDER REVISION 1 MFR’S VERSION C MFR’S VERSION PCB010 VMA245B A34JXV70X53N45 VMA245D A34AGT13X98(L) Please file this revision with the original version.
  • Page 71 PCB VERSION UP ELECTRICAL REPLACEMENT PARTS LIST MFR'S VERSION A MFR'S VERSION C PART NO. DESCRIPTION PART NO. DESCRIPTION REF. NO. SYSCON PCB ASS'Y (VERSION A) SYSCON PCB ASS'Y (VERSION C) PCB010 A5A3A9C010 A5A3A9C010 VMA245B VMA245D SYSCON PCB's are interchangeable. Change of CRT ELECTRICAL REPLACEMENT PARTS LIST MFR'S VERSION A...

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