Silva VRC4020 Service Manual Download Page 78

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Summary of Contents for VRC4020

Page 1: ...ng I Adjustment Procedures I Schematic Diagrams I CBA s Sec 2 Deck Mechanism Section I Standard Maintenance I Alignment for Mechanism I Disassembly Assembly of Mechanism I Alignment Procedures of Mech...

Page 2: ...net Disassembly Instructions 1 5 1 Electrical Adjustment Instructions 1 6 1 Block Diagrams 1 7 1 Function Indicator Symbols 1 7 13 Schematic Diagrams CBA s and Test Points 1 8 1 Waveforms 1 9 1 Wiring...

Page 3: ...1 4 Video Color S N AM R P dB 37 41 SP Mode 1 5 Video Color S N PM R P dB 30 36 SP Mode 1 6 Resolution PB Line 230 245 SP Mode 2 Servo 2 1 Jitter Low sec 0 07 0 12 SP Mode 2 2 Wow Flutter 0 3 0 5 SP...

Page 4: ...e especially 1 Wires covered with PVC tubing 2 Double insulated wires 3 High voltage leads D Use specified insulating materials for hazardous live parts Note especially 1 Insulation tape 2 PVC tubing...

Page 5: ...RF termi nals antenna terminals video and audio input and output terminals microphone jacks earphone jacks etc is lower than or equal to the specified value in the table below Measuring Method Power...

Page 6: ...the flat pack IC with tweezers while apply ing the hot air 3 Bottom of the flat pack IC is fixed with glue to the CBA when removing entire flat pack IC first apply soldering iron to center of the fla...

Page 7: ...pins of the flat pack IC you can remove it easily Fig S 1 3 2 Affix the wire to a workbench or solid mounting point as shown in Fig S 1 5 3 While heating the pins using a fine tip soldering iron or ho...

Page 8: ...cur due to a potential difference caused by electro static charge during unpacking or repair work 1 Ground for Human Body Be sure to wear a grounding band 1M that is prop erly grounded to remove any s...

Page 9: ...e Deck Mechanism Assembly and press the PLAY button The tape will be loaded into the Deck Mechanism Assembly Make sure the power is on connect TP507 SENSOR INHIBITION to GND This will stop the functio...

Page 10: ...them 1 Remove Screws S 2 Screws S 3 and Screw S 4 Then slowly lift the VCR Chassis Unit Deck Assembly Jack CBA and Main CBA up 2 When reassembling solder wire jumpers as shown in Fig 5 3 Before instal...

Page 11: ...2 HE261DC L 2 L 1 2 Front Assembly L 2 Fig 2 S 2 S 2 S 4 S 2 S 2 S 3 S 3 3 VCR Chassis Unit Fig 3 1 VRC4020 S 2 S 2 S 4 S 2 S 2 S 3 S 3 3 VCR Chassis Unit S 3 Fig 3 2 VRC4060 S 5 4 Jack CBA Desolder F...

Page 12: ...From AC Head Assembly Lead with blue stripe Lead with blue stripe Desolder from bottom Lead with blue stripe From Capstan Motor Assembly Lead connections of Deck Assembly and Main CBA Printing side 7...

Page 13: ...oscope Dual trace with 10 1 probe V Range 0 001 50V Div F Range DC AC 20MHz 2 Alignment Tape FL6A Head Switching Position Adjustment Purpose To determine the Head Switching point during playback Sympt...

Page 14: ...L TU701 TUNER UNIT IC503 MEMORY 72 32 19 83 IIC BUS SCL D V SYNC D REC H RF SW H A SW C ROTA IIC BUS SDA H A COMP V ENV C SYNC IIC BUS SCL 71 3 5 SDA SCL 12 11 LD SW 9 AL 12V 20 5V P ON 15V AL 5V AL 5...

Page 15: ...SIGNAL MODE SP REC SERIAL DECORDER V OUT1 1 V IN1 1 3 3 V OUT2 1 V IN2 3 1 3 JACK CBA 48 50 52 56 24 6 50 52 19 20 JK101 V OUT1 V IN1 19 20 JK102 CL151 CL152 CL101 CL102 V OUT2 V IN2 61 63 96 95 93 9...

Page 16: ...H 2 CL287 AUDIO HEAD AUDIO ERASE HEAD ACE HEAD ASSEMBLY FE HEAD 2 FE H 1 FE H GND CL501 1 7 5 1 7 6 HE261BLA MAIN CBA PB AUDIO SIGNAL REC AUDIO SIGNAL Mode SP REC 71 A MUTE H AUDIO SW 1 AUDIO SW 2 IIC...

Page 17: ...UDIO SIGNAL PROCESS 15 13 17 4 A PB REC CL504 3 A COM 1 AE H 2 AE H FE H A PB REC 4 A COM 3 AE H 1 AE H FE H 2 CL287 AUDIO HEAD AUDIO ERASE HEAD ACE HEAD ASSEMBLY FE HEAD 2 FE H 1 FE H GND CL501 1 7 7...

Page 18: ...SS 9 A IN2 L 8 9 8 A OUT2 R 6 A OUT2 L 11 6 11 A IN1 R 10 A IN1 L 8 10 8 A OUT1 R 6 A OUT1 L 12 6 12 IC451 1 7 9 1 7 10 Hi Fi AUDIO R HEAD Hi Fi AUDIO L HEAD CYLINDER ASSEMBLY Hi Fi A R 9 Hi Fi COM 8...

Page 19: ...cuit are not defective before you connect the AC plug to the AC power supply Otherwise it may cause some components in the power supply circuit to fail HE261BLP 1 7 11 1 7 12 COLD MAIN CBA HOT CIRCUIT...

Page 20: ...mode L TAPE IN 1 When reel and capstan mechanism is not functioning correctly 2 When tape loading mechanism is not functioning correctly 3 When cassette loading mechanism is not functioning correctly...

Page 21: ...8Hz interval When reel and capstan mechanism is not functioning correctly 1 Blinks at 0 8Hz interval When tape loading mechanism is not func tioning correctly 2 Blinks at 0 8Hz interval When cassette...

Page 22: ...fully The use of substitute replacement parts that do not have the same safety characteristics as speci fied in the parts list may create shock fire or other hazards Capacitor Temperature Markings Not...

Page 23: ...only original replacement parts which are listed with their part numbers in the parts list section of the service manual 4 Wire Connectors 1 Prefix symbol CN means connector can disconnect and reconn...

Page 24: ...Main 1 7 Schematic Diagram 1 8 3 1 8 4 HE261SCM1 Comparison Chart of Models and Marks MODEL MARK VRC4020 A VRC4060 B...

Page 25: ...Main 2 7 Sensor Schematic Diagrams 1 8 5 1 8 6 HE261SCM2 Comparison Chart of Models and Marks MODEL MARK VRC4020 A VRC4060 B...

Page 26: ...Main 3 7 Schematic Diagram 1 8 7 1 8 8 HE261SCM3 Comparison Chart of Models and Marks MODEL MARK VRC4020 A VRC4060 B...

Page 27: ...Main 4 7 Jack Sub Jack Schematic Diagrams 1 8 9 1 8 10 HE261SCM4 Comparison Chart of Models and Marks MODEL MARK VRC4020 A VRC4060 B...

Page 28: ...he same type fuse CAUTION Fixed voltage or Auto voltage selectable power supply circuit is used in this unit If Main Fuse F001 is blown check to see that all components in the power supply circuit are...

Page 29: ...Main 6 7 Schematic Diagram B 1 8 13 1 8 14 HE463SCM6 Comparison Chart of Models and Marks MODEL MARK VRC4020 A VRC4060 B...

Page 30: ...1 8 15 1 8 16 HE261SCM7 Main 7 7 Schematic Diagram...

Page 31: ...1 8 17 1 8 18 AFV Schematic Diagram B HE463SCAFV Comparison Chart of Models and Marks MODEL MARK VRC4020 A VRC4060 B...

Page 32: ...TROUBLESHOOTING THIS TYPE POWER SUPPLY CIRCUIT A VARIABLE ISOLATION TRANSFORMER IS REQUIRED BHB300F01014 A BHB300F01014 B Sensor CBA Top View BHE470F01014 A CAUTION For continued protection against fi...

Page 33: ...N TROUBLESHOOTING THIS TYPE POWER SUPPLY CIRCUIT A VARIABLE ISOLATION TRANSFORMER IS REQUIRED CAUTION For continued protection against fire hazard replace only with the same type fuse CAUTION Fixed vo...

Page 34: ...1 8 23 1 8 24 Jack CBA Top View Jack CBA Bottom View BHE470F01014 C...

Page 35: ...1 8 25 1 8 26 AFV CBA Top View B AFV CBA Bottom View B BHC400F01091 Sub Jack CBA Top View Sub Jack CBA Bottom View BHE470F01014 B Comparison Chart of Models and Marks MODEL MARK VRC4020 A VRC4060 B...

Page 36: ...V OUT E E 10usec 50mV x 10 J23 of Main CBA WF3 UPPER WF1 LOWER V OUT 0 1V x 10 RF SW 0 5V x 10 50usec J23 of Main CBA TP502 of Main CBA WF2 C PB 10mV x 10 RF SW 0 5V x 10 5msec UPPER LOWER WF1 TP502 o...

Page 37: ...TAN MOTOR FULL ERASE HEAD FE HEAD VIDEO R 1 HEAD VIDEO L 1 HEAD SIF 1 NU 2 TU AUDIO R 3 GND 4 TU AUDIO L 5 P ON 5V 6 P ON 5V 7 IIC BUS SCL 8 IIC BUS SDA 9 1 2 3 4 5 6 7 8 9 CN701 CN1 GND 1 V OUT2 2 NU...

Page 38: ...ummy V sync Output H Hi z 14 IN REMOC ON IN Remote Control Sensor L 15 OUT C ROTA Color Phase Rotary Changeover SIgnal H L 16 A N U Not Used B OUT H A SW Video Head Amp Switching Pulse H L 17 A N U No...

Page 39: ...Pin No Mark IN OUT Signal Name Function Active Level 59 OUT 8POUT 1 SCART 1 8Pin Output Control Signal H L 60 N U Not Used 61 N U Not Used 62 OUT SD H SD H 63 N U Not Used 64 N U Not Used 65 N U Not U...

Page 40: ...tion Detection Pulse PULSE 88 N U Not Used 89 N U Not Used 90 IN D PFG Drum Motor Phase Frequency Generator PULSE 91 AMPVRE F OUT V Ref for CTL AMP 92 AMPVRE Fin V Ref for CTL AMP 93 P80 C P80 C Termi...

Page 41: ...E2 2SC1815 GR TPE2 2SC3266 Y TPE2 2SC2120 Y TPE2 KTC3203 Y 2SA1020 Y KTC3205 Y 2SA1015 GR TPE2 E C B E C PT204 6B 12 MID 32A22F 5 4 8 1 CAT24WC02JI BR24C02F W B1 E B2 C1 C2 RN1511 TE85R FMG4A T148 KTA...

Page 42: ...ice Fixtures and Tools 2 2 1 Mechanical Alignment Procedures 2 3 1 Disassembly Assembly Procedures of Deck Mechanism 2 4 1 Alignment Procedures of Mechanism 2 4 8 Sec 2 Deck Mechanism Section I Standa...

Page 43: ...3 Recording model only B86 Not used in 2 head model H Hours Check I Change Deck Periodic Service Schedule Ref No Part Name 1 000 H 2 000 H 3 000 H 4 000 H B2 Cylinder Assembly I I B3 Loading Motor Ass...

Page 44: ...hard material but since it is very thin avoid cleaning it vertically 2 Wait for the cleaned part to dry thoroughly before operating the unit 3 Do not reuse a stained head cleaning stick or a stained...

Page 45: ...ignment Tape FL6N8 1 speed only FL6NS8 2 speed only Azimuth and X Value Adjustment of Audio Control Head Adjustment of Envelope Waveform J 2 Guide Roller Adj Screwdriver Available Locally Guide Roller...

Page 46: ...that the Moving guide preparations are in the Eject Position 4 Turn the LDG Belt in the appropriate direction shown in Fig M1 until the Moving guide prepara tions come to the Eject Position Stop turni...

Page 47: ...the X value and envelope Not good Do the final tape traveling test to see that the tape runs normally in play mode with out creasing or slacking Completion Not good OK OK OK Not good Not good OK Flowc...

Page 48: ...ition of the Audio Control Erase Head Symptom of Misalignment If the Horizontal Position of the Audio Control Erase Head is not properly aligned maximum envelope can not be obtained at the Neutral pos...

Page 49: ...f Guide Roller 2 Refer to Fig M3 so that the waveform looks like the one shown in Fig M9 4 If the envelope is as shown in Fig M8 adjust the height of Guide Roller 3 Refer to Fig M3 so that the wavefor...

Page 50: ...1 DM6 Desolder 3 S 2 8 8 Loading Motor Assembly T DM1 DM7 Desolder LDG Belt 2 S 3 9 9 AC Head Assembly T DM1 DM7 S 4 10 2 Tape Guide Arm Assembly T DM1 DM8 P 2 11 10 C Door Opener T DM1 DM8 L 4 12 11...

Page 51: ...bly HI is not used in 2 head model 34 26 Loading Arm SP Assembly B DM2 DM14 Refer to Alignment Sec Pg 2 4 8 35 34 Loading Arm TU Assembly B DM2 DM14 Refer to Alignment Sec Pg 2 4 8 36 16 26 M Brake TU...

Page 52: ...2 4 3 U27HSPAL2DA 14 13 11 10 12 7 49 8 32 43 41 40 31 42 45 44 46 9 36 15 38 37 Fig DM1 Top View 34 19 35 25 26 24 23 27 33 20 28 22 Fig DM2 Bottom View...

Page 53: ...slide and pull up the right side on 2 to release Pin A and Pin B from the slots A Then remove Pin C and Pin D on 2 from the slots B as shown 2 Pin A Slots B Pin C Pin B Pin D Pull up Slide Slot A Slot...

Page 54: ...te Stripe A 8 9 S 4 S 3 LDG Belt Fig DM8 11 13 12 A 10 L 4 Adj Screw P 3 P 2 27 When reassembling 10 and 12 confirm that pin of 10 and pin of 12 are in the groove of 27 as shown Pin of 12 Pin of 10 Gr...

Page 55: ...Fig DM13 Align 26 and 27 as shown Bottom View 27 Pin of 36 Pin of 33 Position of Mode Lever when installed Pin of 37 26 When reassembling 27 meet the first groove on 27 to the first tooth on 44 as sh...

Page 56: ...2 4 7 U27HSPAL2DA Refer to the Alignment Section Page 2 4 8 Fig DM14 33 32 L 9 P 5 34 35 Fig DM15 37 39 turn turn 42 43 38 P 6 turn 36 L 10 40 41 C 6 C 7 Fig DM16 44 45 46 L 11 47 48 Slide Fig DM17...

Page 57: ...echanical or electrical parts Alignment points in Eject Position Alignment 1 Loading Arm SP and TU Assembly Install Loading Arm SP and TU Assembly so that their triangle marks point to each other as s...

Page 58: ...ION VIDEO CASSETTE RECORDER VRC4020 VRC4060 TABLE OF CONTENTS Exploded Views 3 1 1 Mechanical Parts List 3 2 1 Electrical Parts List 3 3 1 Deck Parts List 3 4 1 Sec 3 Exploded views and Parts List Sec...

Page 59: ...3 1 1 HE360_460FEX A1X EXPLODED VIEWS Front Panel...

Page 60: ...012 2B18 2B9 2B9 1B1 2L021 2L021 2L021 2L021 2L021 A2 2L011 2L011 2L011 2L011 2L011 A7 A3 A10 JACK CBA A5 2L031 2L099 2L041 2L041 MAIN CBA 2L041 2B7 2B8 2B46 SENSOR CBA 2B5 2L051 AFV CBA SUB JACK CBA...

Page 61: ...3 1 3 HE261PEX Some Ref Numbers are not in sequence X2 X3 X20 X1 X4 S1 Unit S3 A14 S2 S2 Packing...

Page 62: ...ssis Assembly Bottom View Lubricating Point B2 B35 B410 B411 B494 B567 L1053 B74 B10 L1191 B73 B9 B12 B492 B11 B571 B37 B126 L1466 B501 B8 B121 L1450 L1450 L1051 L1467 B553 B86 Mark Description Floil...

Page 63: ...B565 L1151 B525 B592 B31 L1406 B148 B521 B590 B487 B573 B574 B499 B587 B508 B558 B557 B3 B417 B584 B591 Mark Description Floil G 684G or Multemp MH D Blue grease SLIDUS OIL 150 B522 B414 B416 B518 B5...

Page 64: ...B563 B300 B562 B482 L1341 B355 B354 B483 B425 L1321 B347 L1321 B361 B359 B529 B360 B514 B313 Some Ref Numbers are not in sequence Mark Description Floil G 684G or Multemp MH D Blue grease SLIDUS OIL 1...

Page 65: ...2 2B7 HEAD SHIELD ASSEMBLY HE470ED See Electrical Parts List 2B8 BUSH LED F H3700UD See Electrical Parts List 2B9 CUSHION HC460ED 0VM413251 2B18 FIBER TOP CASE HC460ED 0VM412906 2B46 ROHM HOLDER H7770...

Page 66: ...IC DOUBLE LAYER CAP 0 047F 5 5V Z CA0J473MS014 C056 CHIP CERAMIC CAP B K 0 047 F 50V or CHD1JK30B473 CHIP CERAMIC CAP B K 0 047 F 25V CHD1EK30B473 C057 CHIP CERAMIC CAP CH J 470pF 50V or CHD1JJ3CH471...

Page 67: ...H7 CE1JMAVSL1R0 C343 CHIP CERAMIC CAP F Z 0 1 F 50V or CHD1JZ30F104 Ref No Mark Description Part No CHIP CERAMIC CAP F Z 0 1 F 25V or CHD1EZ30F104 CHIP CERAMIC CAP FZ Z 0 1 F 50V CHD1JZ3FZ104 C345 CH...

Page 68: ...HD1JZ3FZ104 C513 CHIP CERAMIC CAP CH J 22pF 50V or CHD1JJ3CH220 CHIP CERAMIC CAP CG J 22pF 50V CHD1JJ3CG220 Ref No Mark Description Part No C514 CHIP CERAMIC CAP CH J 22pF 50V or CHD1JJ3CH220 CHIP CER...

Page 69: ...48M or NDTZ01N4148M SWITCHING DIODE 1SS133 T 77 QDTZ001SS133 D023 A ZENER DIODE DZ 5 1BSBT265 or NDTB0DZ5R1BS A ZENER DIODE MTZJT 775 1B QDTB0MTZJ5R1 D051 RECTIFIER DIODE 1N4005 NDQZ001N4005 D052 RECT...

Page 70: ...NQ140KTA1504 CHIP TRANSISTOR KTA1504Y RTK NQ1Y0KTA1504 Ref No Mark Description Part No Q352 TRANSISTOR KTC3199 Y or NQSY0KTC3199 TRANSISTOR KTC3199 GR or NQS10KTC3199 TRANSISTOR 2SC2785 J or QQSJ02SC...

Page 71: ...f No Mark Description Part No R154 A CHIP RES 1608 1 10W J 390k RRXAJR5Z0394 R155 A CHIP RES 1608 1 10W J 22k RRXAJR5Z0223 R251 A CHIP RES 1608 1 10W J 1 8k RRXAJR5Z0182 R251 B CHIP RES 1608 1 10W J 2...

Page 72: ...CX6JATZ0102 CARBON RES 1 4W J 1k RCX4JATZ0102 R516 CHIP RES 1608 1 10W J 330k RRXAJR5Z0334 R517 CHIP RES 1608 1 10W J 560 RRXAJR5Z0561 Ref No Mark Description Part No R518 CHIP RES 1608 1 10W J 470 RR...

Page 73: ...001A or SST0101AL041 TACT SWITCH TC 1104 H 9 5 SST0101DNG01 MISCELLANEOUS 2B7 HEAD SHIELD ASSEMBLY HE470ED 0VM414333 2B8 BUSH LED F H3700UD 0VM409508 2B46 ROHM HOLDER H7770JD 0VM304573 A4 B JACK BOARD...

Page 74: ...X6JATZ0153 CARBON RES 1 4W J 15k RCX4JATZ0153 R117 CHIP RES 1608 1 10W J 10k RRXAJR5Z0103 R118 CARBON RES 1 4W J 68 RCX4JATZ0680 R119 CHIP RES 1608 1 10W J 75 RRXAJR5Z0750 Ref No Mark Description Part...

Page 75: ...33 ICS IC1 B IC AUDIO PROCESSOR MSP3407G QG B8 or NSZBA0SP3001 B IC AUDIO PROCESSOR MSP3407G QG B8 V3 NSZBA0SP3004 COILS L1 B INDUCTOR 10 H K 26T LLAXKATTU100 L2 B PCB JUMPER D0 6 P5 0 JW5 0T L3 B IND...

Page 76: ...3773 B303 F DOOR OPENER MK12 or 0VM203751C F DOOR OPENER MK12 0VM203751 B313 C DRIVE SPRING MK12 0VM414145 B347 GUIDE HOLDER A MK10 0VM304920 B354 SLIDER TU MK12 0VM101172F B355 SLIDER SP MK12 or 0VM1...

Page 77: ...VSA13279 B590 BRAKE ARM TU MK12 0VM203752E B591 BAND BRAKE TU MK12 0VM305724C B592 TG POST MK10 0VM411108E L1051 SCREW B TIGHT M2 6X6 PAN HEAD GPMB9060 L1053 SCREW S TIGHT M2 6X8 WASHER HEAD GCMS9080...

Page 78: ...VRC4020 VRC4060 HE261 463ED...

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