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Memorex MVT2196 Service Manual

Color television/video cassette recorder
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MVT2196
SERVICE MANUAL
ORIGINAL
MFR'S VERSION A
(TV SECTION)
PICTURE SIZE:
SYSTEM:
FREQUENCY RANGE
VHF:
UHF:
CATV:
INTERMEDIATE FREQUENCY
Picture IF Carrier Frequency:
Sound IF Carrier Frequency:
SOUND INTERMEDIATE
FREQUENCY:
MAXIMUM OUTPUT POWER:
10% THD OUTPUT POWER:
SPEAKER:
POWER SOURCE:
POWER CONSUMPTION:
SPECIFICATIONS
(VCR SECTION)
19 inch
NTSC
2-13ch
14-69 ch
14-36 (A)-(W) ch
37-59 (AA)-(WW) ch
60-85 (AAA)-(ZZZ) ch
86-94 (86)-(94) ch
95-99 (A-5)-(A-1) ch
100-125 (100)-(125) ch
01 (5A) ch
45.75 MHz
41.25 MHz
4.5 MHz
2.5 W
2.0 W
16 ohm x 2
AC 120V, 60Hz
86 Watts
Design and specifications are subject to change without notice.
COLOR TELEVISION/
VIDEO CASSETTE RECORDER
OPERATING TEMPERATURE:
STORAGE TEMPERATURE:
VIDEO RECORDING SYSTEM:
HEADS:
TAPE WIDTH:
AUDIO TRACK:
F.FWD TIME:
REW TIME:
TAPE SPEED:
INPUT LEVEL:
OUTPUT LEVEL:
WEIGHT:
DIMENSIONS:
5°C to 40°C
-20°C to 60°C
VHS, 2 rotary heads helical
scanning system
Luminance: FM azimuth recording
Color Signal: Converted subcarrier
phase shift recording
Video: 2 Rotary Heads
Audio/Control: 1 Stationary Head
Erase: 1 Full Track Erase Head
12.65 mm high density tape
1 track
Approx. 3' 40"(T-120 Cassette)
Approx. 2' 50"(T-120 Cassette)
SP: 33.35 mm/sec
LP: 16.67 mm/sec
SLP: 11.12 mm/sec
Video: 1.0Vp-p, 75 ohm unbalanced
Audio: 300mV, 50k ohm unbalanced
Video: 1.0Vp-p, 75 ohm unbalanced
Audio: 300mV, 1k ohm unbalanced
48.4 lbs
19 1/2"(W) x 18 5/9"(D) x19 1/16"(H)

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  • Page 1 MVT2196 SERVICE MANUAL COLOR TELEVISION/ VIDEO CASSETTE RECORDER ORIGINAL MFR’S VERSION A SPECIFICATIONS (TV SECTION) (VCR SECTION) PICTURE SIZE: 19 inch OPERATING TEMPERATURE: 5°C to 40°C SYSTEM: NTSC STORAGE TEMPERATURE: -20°C to 60°C FREQUENCY RANGE VIDEO RECORDING SYSTEM: VHS, 2 rotary heads helical...
  • Page 2 MVT2196 SERVICE MANUAL COLOR TELEVISION/VIDEO CASSETTE RECORDER REVISION 1 MFR’S VERSION C MFR’S VERSION M2001 IC101 OEC7034A EP15BB OEC7034B F2QSB02 Please file this revision with the original version.
  • Page 3 Change of IC1001 DIFFERENCES MFR'S VERSION A MFR'S VERSION C PART NO. DESCRIPTION PART NO. DESCRIPTION REF. NO. IC1001 I56F57034A IC OEC7034A I56F57034B OEC7034B PCB010 A54609A01A SYSCON PCB ASS'Y VM9149A A54609A01B SYSCON PCB ASS'Y VM9149A NOTE FOR THE REPLACING OF MEMORY IC MFR'S VERSION A MFR'S VERSION C DATA...
  • Page 4 Y/C/AUDIO/HEAD AMP SCHEMATIC DIAGRAM L4014 C4082 TP4001 68uH 20P CH FROM POWER P.CON+5V C4079 W813 R4005 W856 Y/C_AUDIO C4055 0.1 B 1.5K W833 L4006 6.3V C4078 C4001 FROM/TO I/O 100uH 0.027 B 6.3V FRONT_VIDEO C4056 0.1 B R4044_1 W868 REAR_VIDEO 1.8K FRONT_AUDIO 15.6KHZ TRAP...
  • Page 5 MICON SCHEMATIC DIAGRAM SERVICE TP1001 D1011 SB10-03A3 FROM/TO POWER AT+5.6V C1082 R1032 D1006 SB10-03A3 P.CON+5V 0.01 B P.CON+12V POWER_FAIL[DC] C1041 VCR_POWER_H C1060 0.1 B R1059 150P CH 4.7K INVERTER C1061 CAP_VCO R1029 Q1016 (S/S) 2SC2412K 150P CH C1055 4.7K -0.7 MOTOR_GND 330P CH C1034...
  • Page 6 POWER SCHEMATIC DIAGRAM TO Y/C/A/H.AMP P.CON+5V P.CON 5V DRIVER C1004 Q1019 FROM/TO MICON 2SB1134R P.CON+5V CAP_VCO AT+5.6V FROM TV POWER R1065 P.CON+12V CD810 MOTOR_GND CH2A014A POWER_FAIL[DC] AT+12V AT+12V R1069 P.CON SW P.CON+9V VCR_POWER_H D1008 Q1006 1.5K AT 5.6V 2SC2412K 11EQS04N TO I/O MOTOR GND W818...
  • Page 7 IN/OUT SCHEMATIC DIAGRAM FROM/TO SOUND AMP SOUND+ SP_OUT FROM/TO MICON REC LED SW T-REC LED SW TV POWER SW Q4205 Q4206 Q4204 IIC_OFF DTC114EKA DTC114EKA DTC114EKA FROM POWER AT+5.6V REC_LED T-REC_LED P.CON+9V KEY_B KEY_A REMOCON_IN W822 FROM CHROMA/IF TV_POWER_H EXT_MUTE SOUND_GND B.OUT FROM/TO Y/C/A/H.AMP...
  • Page 8 CHROMA/IF SCHEMATIC DIAGRAM FROM/TO MICON X_RAY L607 C669 C671 100uH 0.1 B 47P CH VCR_POWER_H TV_POWER_H R675 OSD_R R656 OSD_G TP601 BUFFER OSD_B BUFFER Q602 Q608 OSD_BLK 2SA1037AK TU_VIDEO 2SA1037AK C675 AFT_M FROM/TO Y/C/A/H.AMP C668 R621 22P CH TRICK-PB-H L613 4.7K TU_VIDEO 47uH...
  • Page 9 SOUND AMP SCHEMATIC DIAGRAM SOUND AMP IC352 AN7523 CD353 FROM/TO I/O CP353 CH12415A SPEAKER B2B-EH-A SP_OUT SP OUT SOUND GND W858 SP351 W859 SOUND+ AA0316S1 CP352 CD352 B2B-EH-A CH12416A SPEAKER FROM MICON SP OUT R359 MUTE SW SOUND GND TV_A_MUTE Q351 SP352 2SC2412K...
  • Page 10 TV POWER SCHEMATIC DIAGRAM TV.POWER_H P.CON+125V 5A 125V 2.5A 250V 4A 125V 2A 125V 127.0 127.5 CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, 127.0 +B 100V DRIVE RELAY DRIVE 100V DRIVE REPLACE ONLY WITH THE SAME TYPE FUSE 5A 125V Q503 Q504 Q502...
  • Page 11 DEFLECTION SCHEMATIC DIAGRAM V.OUTPUT IC401 LA7840 THERMAL PUMP UP PROTECTION 14.2 23.5 22.8 FROM/TO DY C412 500V 390P CP401 TV-50P-05-V2 C409 0.0022 M R404 R413 R416 4.7K 1.8K FROM/TO CHROMA/IF CP820 8283_1112_00_000 SOUND GND SOUND +B CC004 TP-1S-05 VCR POWER H HS401 TV POWER H V801...
  • Page 12 CRT SCHEMATIC DIAGRAM FROM CHROMA/IF TP801 CP850 R802 8283_0512_00_000 15K 2W R807 W803 CUT OFF G.OUT 2.7K 1/4W 132.5 R.OUT RED AMP Q804 B.OUT 2SC4217 104.1 132.5 132.8 R811 J801 CVT3275-5102 4.7K TP802 R805 15K 2W 132.1 GREEN AMP Q805 2SC4217 R808 W804...
  • Page 13 OPERATION SCHEMATIC DIAGRAM W802 OS753 PIC-28143TH5 R766 1/2W Vout R778 R771 R772 R773 R774 1.5K 2.7K 5.6K R775 R776 R777 1.5K FROM/TO I/O J351 CD757 CH2A014A HSJ2630-010070 REMOCON OUT AT 5V R350 POWER ON L 56 1/2W KEY A T-REC LED R351_1 REC LED 56 1/2W...
  • Page 14 DECK SCHEMATIC DIAGRAM LOADING MOTOR M101 S105 BOT SENSOR Q101 S106 RPT-38PB113 S101 S102 S103 S104 FROM/TO MICON CP101 52044-0445 LDM+ LDM- FROM/TO MICON CP102 173979-2 EOT SENSOR Q102 RPT-38PB113 PCB550 VE8851 NOTE: NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME THE DC VOLTAGE AT EACH PART WAS MEASURED WITH THE DIGITAL TESTER OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE...
  • Page 15 INTERCONNECTION DIAGRAM J351 OS753 J701 HALL MAIN ROTOR SENSOR COIL MAGNET FG SENSOR Vout OPERATION PCB PCB030 TE9980 L005 HALL HALL SWITCH LOGIC CP1004 SPEAKER MOTOR GND CP352 I LIMIT SP OUT SOUND GND SP352 CD352 SPEAKER CP353 CAP.M F/R CAPSTAN DD UNIT SP OUT VCC(5V)
  • Page 16 WAVEFORMS Y/C/AUDIO/HEAD AMP POWER(TV) 1 5.0V 20ms/div 50.0V 20µs/div 11 PB 0.5V 0.5ms/div DEFLECTION 2 2.0V 20µs/div 7 50.0V 20µs/div 12 PB 100mV 1ms/div DEFLECTION 3 0.5V 5ms/div 10.0V 5ms/div 13 PB 50mV 0.5ms/div POWER(TV) 4 200mV 20µs/div 9 20.0V 20µs/div 14 PB 0.5V 20µs/div 5 50.0V 20µs/div...
  • Page 17 WAVEFORMS 16 REC 21 PB 26 POWER ON 100mV 20µs/div 1.0V 0.5ms/div 0.5V 10ms/div 17 POWER ON 22 PB 27 POWER ON 0.5V 1ms/div 1.0V 5ms/div 20.0V 20µs/div 18 POWER ON 23 PB 28 POWER ON 50mV 1ms/div 1.0V 5ms/div 5.0V 5ms/div MICON IN/OUT...
  • Page 18 WAVEFORMS CHROMA/IF SOUND AMP 31 POWER ON 36 POWER ON 0.5V 1ms/div 200mV 1ms/div 32 POWER ON 50mV 1ms/div 33 POWER ON 0.5V 20µs/div 34 POWER ON 200mV 20µs/div 35 POWER ON 10.5V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 19 MECHANICAL EXPLODED VIEW J801 PCB110 (CRT PCB ASS'Y) L503 V801 FB401 PCB070 (MAIN PCB ASS'Y) SP352 PCB030 (OPERATION PCB ASS'Y) SP351...
  • Page 20 MECHANICAL EXPLODED VIEW TU601 PCB010 (SYSCON PCB ASS'Y)
  • Page 21 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 each position.
  • Page 22 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 23 MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION A54609A720 CABINET,FRONT ASS'Y 752WSA0144 SHIELD,CASE HEAD AMP 753WUA0051 SPRING,EARTH HEAD AMP 771WPAA010 PLATE,JACK 761WPA0145 HOLDER,FBT ---- HEAT SINK ---- HEAT SINK ---- HEAT SINK ---- HEAT SINK ---- METAL SPACER 8995034000 CORD CLIP UL CO. ---- COATING CLIP 701WPJ0839 CABINET,FRONT...
  • Page 24 CHASSIS REPLACEMENT PARTS LIST REF. NO. PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION 85OA500022 AHC ASS'Y 8107126A04 SCREW,TAP TITE(S) PAN 2.6x10 85OP200270 BELT,CAPSTAN 8107226804 SCREW,TAP TITE(S) BIND 2.6x8 85OP900689 LEVER,REC 8107226604 SCREW,TAP TITE(S) BIND 2.6x6 85OP500083 BASE,AC HEAD 8109126604 SCREW,TAP TITE(B) PAN 2.6x6 85OP800324 SPRING,AC HEAD...
  • Page 25 ELECTRICAL REPLACEMENT PARTS LIST REF. NO.PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION RESISTORS DIODES ! R418 R4X5T41R5F R,METAL 1.5 OHM 1/4W D506 D28T10ELS6 DIODE,RECTIFIER 10ELS6TA1B2 ! R439 R4X5T4223F R,METAL 22K OHM 1/4W ! D509 D28T21DQN9 DIODE,SCHOTTKY 21DQ09N-TA2B1 R425T4223F R,METAL 22K OHM 1/4W ! D510 D2BTRU2AM0 DIODE,SILICON...
  • Page 26 ELECTRICAL REPLACEMENT PARTS LIST REF. NO.PART NO. DESCRIPTION REF. NO. PART NO. DESCRIPTION TRANSISTORS SWITCHES Q1006 T8YJ2412K0 TRANSISTOR SILICON 2SC2412KT146 R,S SW798 0504201T31 SWITCH,TACT SKHVBED010 Q1009 0002G00550 PHOTO COUPLER GP1S94L SW799 0504201T31 SWITCH,TACT SKHVBED010 Q1014 TNYJC05001 COMPOUND TRANSISTOR DTC124EKAT146 SW1001 0508221001 SWITCH (LEAF) SPVF130100 VARIABLE RESISTORS...
  • Page 27 ELECTRICAL REPLACEMENT PARTS LIST REF. NO.PART NO. DESCRIPTION MISCELLANEOUS ! V801 098Q200482 A48AGY13X78 X604 100W3R5702 CRYSTAL 3.579545MHz X1001 100CA01203 CRYSTAL 12MHz X1002 100C32R803 CRYSTAL 32.768KHz X4001 1006A3R504 CRYSTAL 3.579545MHz RESISTOR RC....CARBON RESISTOR CAPACITORS CC....CERAMIC CAPACITOR CE....ALUMI ELECTROLYTIC CAPACITOR CP....
  • Page 28 PRINTED CIRCUIT BOARDS MAIN/CRT W014 CP820 W005 W047 HS503 R423 C511 C520 CP810 W012 S802X C420 W822 W817 C537 W010 IC503 S802Y W027 D517 W823 IC504 D519 R519 W825 W816 R520 C519 R460 C422 C438 W021 C516 D505 ICP505 B504 L401 D512 C417...
  • Page 29 PRINTED CIRCUIT BOARDS SYSCON COMPONENT SIDE W071 TP4001 TP1002 CC001 C661 CP1002 CP351 CP352 R4201 W188 IC601 C683 W160 Q620 W119 R1027 W164 C4020 C4024 C4029 W855 W816 W027 W823 W831 C4023 W115 C4078 B4002 W161 W813 W168 W038 L4006 C1072 W176 W037...
  • Page 30 PRINTED CIRCUIT BOARDS SYSCON SOLDER SIDE C4206 R4232 Q607 Q1006 Q4204 R1065 Q4210 C1067 R1064 Q1014 Q4205 Q1017 Q1018 R603 C657 R605 Q4206 C604 Q1002 R606 R1047 R1046 C658 R1066 R617 C622 Q1004 Q4212 C1074 R620 C616 C615 W863 R653 R611 C674 C676 R1039...
  • Page 31 PRINTED CIRCUIT BOARDS OPERATION SW791 SW794 SW792 SW793 SW795 SW799 SW751 SW797 R773 R766 R772 W003 W001 R774 W002 OS753 J351 R771 SW798 W802 CD351_1 C755 W004 CD757 SW796 W005 DECK CP101 CP102 Q101 Q102...

  • Page 32: 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 33: Table Of Contents

    CONTENTS SPECIFICATIONS ......................COVER SERVICING NOTICES ON CHECKING ..............HOW TO ORDER PARTS .................... CONTENTS ......................... DISASSEMBLY INSTRUCTIONS 1.REMOVAL OF MECHANICAL PARTS AND P.C. BOARDS ........ B1-1, B1-2 2.REMOVAL OF DECK PARTS ................B2-1~B2-5 KEY TO ABBREVIATIONS ..................C1-1, C1-2 SERVICE MODE LIST ....................

  • Page 34: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF MECHANICAL PARTS 1-3: TV/VCR BLOCK (Refer to Fig. 1-3) Remove the 2 screws 1. AND P.C. BOARDS Disconnect the following connectors: 1-1: BACK CABINET (Refer to Fig. 1-1) (CP757, CP353, CP352, CP401, CP502 and CP351). Remove the 6 screws 1.
  • Page 35 DISASSEMBLY INSTRUCTIONS 1-5: DECK SHIELD PLATE (Refer to Fig. 1-5) 1-7: JACK PLATE AND SYSCON PCB (Refer to Fig. 1-7) Remove the 2 screws 1. Remove the screw 1. Remove the screw 2. Remove the Syscon PCB in the direction of arrow (A). Remove the screw 2.

  • Page 36: 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 37 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. Unlock the support 1 and remove the S Reel Stopper. Remove the (A) side of the Link Ass'y first, then remove the (B) side.
  • Page 38 DISASSEMBLY INSTRUCTIONS 2-11: S REEL/T REEL ASS'Y (Refer to Fig. 2-11) NOTE Remove the Idler Ass'y. Do not touch the Pinch Roller Ass'y. (Use gloves.) Remove the S Reel and T Reel Ass'y. When you install the Pinch Roller Ass'y, install as Remove the 2 Polyslider Washers 1.
  • Page 39 DISASSEMBLY INSTRUCTIONS 2-15: CYLINDER UNIT ASS'Y (Refer to Fig. 2-15) Remove the 3 screws 1. Middle Gear Remove the Cylinder Unit Ass'y. E-Ring NOTE Main Cam When you install the Cylinder Unit Ass'y, tighten the screws from (1) to (3) in order while pulling the Ass'y Pinch Roller Cam toward the left front direction.
  • Page 40 DISASSEMBLY INSTRUCTIONS 2-19: LOADING GEAR S/T ASS'Y (Refer to Fig. 2-19-A) 2-20: INCLINED S/T ASS'Y (Refer to Fig. 2-20) Remove the E-Ring 1 and remove the Main Loading Remove the S-S Brake Spring. Unlock the support 1 and remove the Loading Gear Gear.

  • Page 41: 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 42 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 43: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. The both pressing of set key and remote control key will not be possible if clock has been set. To reset clock, either unplug AC cord and allow at least 30 minutes before Power On or alternatively, discharge backup capacitor.

  • Page 44: 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 45 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 46: 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 47: 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 48: Preparation For Servicing

    PREPARATION FOR SERVICING How to use the Servicing Fixture Unplug the connector CP351, CP352, CP757 and CP353, then remove the TV/VCR Block from the set. Unplug the connector CP810, CP820, CP850 and CD401, then remove the Main PCB from the VCR Block. Connect as shown in the below figure using the Service Fixture.

  • Page 49: Mechanical Adjustments

    MECHANICAL ADJUSTMENTS 1. CONFIRMATION AND ADJUSTMENT 1-2: CONFIRMATION AND ADJUSTMENT OF TENSION POST POSITION Read the following NOTE before starting works. Set to the PLAY mode. • Place an object which weighs between 450g~500g on Adjust the Tension Adjust until the length from the edge the Cassette Tape to keep it steady when you want to of the Tension Arm to the stdandard line of the Main make the tape run without the Cassette Holder.
  • Page 50 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 51 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 52 MECHANICAL ADJUSTMENTS 3. MECHANISM ADJUSTMENT PARTS LOCATION GUIDE 1. Tension Adjust P4 Post 2. Tension Arm T Brake Spring 3. Guide Roller T Reel Ass'y 4. P1 Post Idler Ass'y 5. Audio/Control Head S-S Brake Spring 6. X value adjustment driver hole S Reel D1-4...

  • Page 53: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS 1. ADJUSTMENT PROCEDURE Read and perform these adjustments when repairing the CH-2 circuits or replacing electrical parts or PCB assemblies. CAUTION When replacing IC's or transistors, use only specified 6.5H silicon grease (YG6260M). (To prevent the damage to IC's and transistors.) CH-1 Fig.
  • Page 54 ELECTRICAL ADJUSTMENTS 2-5: CUT OFF 2-9: SUB COLOR (TV) Receive the color bar pattern. (RF Input) Place the set with Aging Test for more than 15 minutes. Set condition is AV MODE without signal. Connect the synchro scope to TP801. Using the remote control, set the brightness and Using the remote control, set the brightness, contrast, contrast to normal position.
  • Page 55 ELECTRICAL ADJUSTMENTS 2-15: VERTICAL LINEALITY Receive the monoscope pattern. Using the remote control, set the brightness and contrast to normal position. Activate the adjustment mode display of Fig. 1-1 and press the channel button (1) on the remote control. The Fig. 2-6 appears on the display. Press the channel button (5) on the remote control.
  • Page 56 ELECTRICAL ADJUSTMENTS 3. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (VCR SECTION) TP1001 C1003 TP1002 TP4001 CP603 TU6001 L610 TP601 TP4201 J4201 SYSCON PCB D2-4...
  • Page 57 ELECTRICAL ADJUSTMENTS (TV SECTION) J801 TP803 TP801 CRT PCB VR502 TP401 T501 FOCUS VOLUME FB401 SCREEN VOLUME MAIN PCB D2-5...
  • Page 58 ELECTRICAL ADJUSTMENTS 4-3: STATIC CONVERGENCE 4. PURITY AND CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 4-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator.

  • Page 59: Tv Block Diagram

    TV BLOCK DIAGRAM V. OUTPUT IC401 LA7840 THERMAL PROTECTION PUMP Q405 Q406 H. DRIVE H. OUTPUT X604 3.579545MHz CHROMA/IF FB401 IC604 LA76814M-MPB Q608 BUFFER CLMP J801 VIDEO CLMP Y/C VIDEO PPC1 TINT PFC2 Y/C AUDIO PHASE V801 AHIFTER Y/C/AUDIO/ 1/256 HEAD AMP/ IN/OUT TU_AUDIO...
  • Page 60 Y/C/AUDIO/HEAD AMP/IN/OUT BLOCK DIAGRAM Q4010 BUFFER Y/C/A/H.AMP IC4001 LA71170M-MPB 63 61 CP4001 SP CH1 (R) SP COM C COMB SP CH2 (L) Y_DELAY COMB BEFORE PB BGA COMP BEFORE Q4012 AFTER 320FH PB BGA BUFFER CLAMP PB_FM AFTER NL DE CONV Q4003 Y.N.R...

  • Page 61: Deck

    MICON/POWER/OPERATION BLOCK DIAGRAM SYSCON_TIMER_SERVO SW1001 IC1001 OEC7034A SYSTEM RESET TAB SW RESET-L 3 OUT IC1002 PST600H POWER FAIL(DC) AT+5.6V POWER_FAIL_L P. CON 5V MSSEN-A X-OUT(12MHz) Q1023 MS_SEN A J701 X1001 Q1009 12MHz AUDIO L X_RAY_SW X-IN(12MHz) FRONT_VIDEO XC-OUT(32KHz) MSSEN-B X1002 FRONT_AUDIO MS_SEN B 32.768KHz...

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