FUNAI 27C-250 Service Manual Download Page 22 | Manualshive

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Main 2/7 & Sensor Schematic Diagram

1-8-5

1-8-6

HE244SCM2

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Summary of Contents for 27C-250

Page 1: ...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 Mechani...

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

Page 3: ...Vp p 0 8 1 0 1 2 1 3 Video S N Y R P dB 40 45 SP Mode W O Burst 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...

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: ...arts 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 Po...

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: ...2 are fragile Be careful not to break them 1 Remove five Screws S 2 two 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...

Page 11: ...1 5 2 HE244DC 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 S 5 4 Jack CBA Desolder Fig 4...

Page 12: ...er Assembly 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 Prin...

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: ...SCL SCL TU701 TUNER UNIT IC503 MEMORY 72 83 IIC BUS SCL D V SYNC D REC H RF SW C ROTA IIC BUS SDA V ENV C SYNC IIC BUS SCL 71 3 5 SDA SCL 12 11 CAS LED TIMER LED REC LED 26 25 24 POWER LED 23 D565 REC...

Page 15: ...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 94 90 89 88 87 CHARA INS CCD 1H DELAY SP BYPASS MUTE PB EE IN1 TUNER IN1 TUNER MUTE PB...

Page 16: ...B 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 5 1 7 6 HE244BLA MAIN CBA PB AUDIO SIGNAL REC AUDIO SIGNAL Mode SP REC 71 A M...

Page 17: ...hat all components in the power supply circuit 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 HE244B...

Page 18: ...capstan mechanism is not functioning correctly 2 When tape loading mechanism is not functioning correctly 3 When cassette loading mechanism is not functioning correctly 4 When the drum is not working...

Page 19: ...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 20: ...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 21: ...Main 1 7 Schematic Diagram 1 8 3 1 8 4 HE244SCM1 Comparison Chart of Models and Marks MODEL MARK 27C 250 A 27C 254 B...

Page 22: ...Main 2 7 Sensor Schematic Diagram 1 8 5 1 8 6 HE244SCM2...

Page 23: ...Main 3 7 Schematic Diagram 1 8 7 1 8 8 HE244SCM3...

Page 24: ...Main 4 7 Jack Schematic Diagram 1 8 9 1 8 10 HE244SCM4...

Page 25: ...st fire hazard replace only with the same type fuse CAUTION Fixed voltage or Auto voltage selectable power supply circuit is used in this unit If Main Fuse F1001 is blown check to see that all compone...

Page 26: ...Main 6 7 Schematic Diagram 1 8 13 1 8 14 HE244SCM6...

Page 27: ...Main 7 7 Schematic Diagram B 1 8 15 1 8 16 HE249SCM7 Comparison Chart of Models and Marks MODEL MARK 27C 250 A 27C 254 B...

Page 28: ...TROUBLESHOOTING THIS TYPE POWER SUPPLY CIRCUIT A VARIABLE ISOLATION TRANSFORMER IS REQUIRED BHB300F01014 A BHB300F01014 B Sensor CBA Top View BHE470F01012 A CAUTION For continued protection against fi...

Page 29: ...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 30: ...1 8 21 1 8 22 Jack CBA Top View Jack CBA Bottom View BHE470F01012 C...

Page 31: ...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 32: ...E H GND 1 CL501 CL502 CL504 CL253 GND 1 V OUT1 2 AL 12V 1 3 V IN1 4 NU 5 A OUT1 6 JK1 8P OUT 7 A IN1 8 1 2 3 4 5 6 7 8 CL151 CL101 CAPSTAN MOTOR FULL ERASE HEAD FE HEAD VIDEO R HEAD VIDEO L HEAD GND 1...

Page 33: ...r L 15 OUT C ROTA Color Phase Rotary Changeover SIgnal H L 16 N U Not Used 17 N U Not Used 18 OUT RF SW Video Head Switching Pulse H L 19 N U Not Used 20 A N U Not Used B IN DAVN L VPS PDC Data Receiv...

Page 34: ...Pin No Mark IN OUT Signal Name Function Active Level 71 OUT I2 C BUS SCL I2C BUS Control Clock H L 72 IN OUT I2 C BUS SDA I2C BUS Control Data H L 73 OUT P OFF H Power Off at High L 74 N U Not Used 75...

Page 35: ...rter 95 OUT CTL Playback Record Control Signal H L 96 AMPC CTL AMP Connected Terminal 97 CTLAM Pout To Monitor for CTL AMP Output PULSE 98 AMPVc c AMPVcc 99 AVcc A D Converter Power Input Standard Vol...

Page 36: ...M KTA1281 Y 2SC1815 BL TPE2 2SC1815 Y TPE2 2SC1815 GR TPE2 2SC2120 Y TPE2 KTC3203 Y 2SA1020 Y KTC3205 Y 2SA1015 GR TPE2 E C B E C PT204 6B 12 MID 32A22 5 4 8 1 CAT24WC04JI BR24C04F W CD4052BCSJX BU405...

Page 37: ...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 38: ...ploded Views B73 Recording Model only 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 Assembly I B8 Pul...

Page 39: ...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 40: ...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 41: ...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 42: ...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 43: ...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 44: ...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 45: ...M6 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 Pin...

Page 46: ...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 47: ...2 4 3 U27HSPALDA 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 48: ...t 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 Sl...

Page 49: ...e 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 Gro...

Page 50: ...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 51: ...2 4 7 U27HSPALDA 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 52: ...e mechanical 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 a...

Page 53: ...ION VIDEO CASSETTE RECORDER 27C 250 27C 254 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 54: ...3 1 1 HE240FEX A1X EXPLODED VIEWS Front Panel...

Page 55: ...244CEX 2L022 2L022 2L042 2L012 2B18 2B9 2B9 1B1 2L021 2L021 2L021 2L021 2L021 A2 2L011 2L011 2L011 2L011 2L011 A7 A3 A10 JACK CBA A5 2L031 2L099 2L041 MAIN CBA 2L041 2B7 2B8 2B46 SENSOR CBA 2B5 2L051...

Page 56: ...3 1 3 HE244PEX Some Ref Numbers are not in sequence X2 X3 X20 X20A X20B X20C X1 X4 S1 Unit S3 A14 S2 S2 X6 S7 Comparison Chart of Models and Marks Model Mark 27C 250 27C 254 A B A B Packing...

Page 57: ...nt Chassis 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 Mark Description Floi...

Page 58: ...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 59: ...55 B563 B300 B562 B482 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 150...

Page 60: ...ASE HC460ED 0VM412906 2B46 ROHM HOLDER H7770JD See Electrical Parts List 2L011 SCREW P TIGHT 3X10 BIND HEAD GBCP3100 2L012 SCREW P TIGHT 3X10 BIND HEAD GBCP3100 2L021 SCREW P TIGHT M3X10 WASHER HEAD G...

Page 61: ...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 CHIP CERAMIC CAP...

Page 62: ...20 F 6 3V M H7 CE0KMAVSL221 C352 ELECTROLYTIC CAP 100 F 16V M H7 CE1CMAVSL101 Ref No Mark Description Part No C370 CHIP CERAMIC CAP B K 0 01 F 50V CHD1JK30B103 C371 CHIP CERAMIC CAP B K 0 022 F 50V or...

Page 63: ...ROLYTIC CAP 1 F 50V M H7 NP CP1JMAVSB1R0 C702 CHIP CERAMIC CAP F Z 0 1 F 50V or CHD1JZ30F104 CHIP CERAMIC CAP F Z 0 1 F 25V or CHD1EZ30F104 CHIP CERAMIC CAP FZ Z 0 1 F 50V CHD1JZ3FZ104 C703 ELECTROLYT...

Page 64: ...R 1 8 H K 26T LLAXKATTU1R8 TRANSISTORS Q001 FET 2SK3566 QFWZ02SK3566 Q002 TRANSISTOR KTC3199 BL or NQS50KTC3199 TRANSISTOR 2SC2785 K or QQSK02SC2785 TRANSISTOR 2SC1815 BL TPE2 QQS202SC1815 Q003 TRANSI...

Page 65: ...RRXAJR5Z0223 Ref No Mark Description Part No R027 CARBON RES 1 6W J 1k or RCX6JATZ0102 CARBON RES 1 4W J 1k RCX4JATZ0102 R028 CARBON RES 1 4W J 1M RCX4JATZ0105 R029 CARBON RES 1 4W J 180 RCX4JATZ0181...

Page 66: ...10k RRXAJR5Z0103 R525 CHIP RES 1608 1 10W J 1 5k RRXAJR5Z0152 R526 CHIP RES 1608 1 10W J 1 8k RRXAJR5Z0182 Ref No Mark Description Part No R527 CHIP RES 1608 1 10W J 680 RRXAJR5Z0681 R528 CHIP RES 16...

Page 67: ...UMPER D0 6 P10 0 JW10 0T TP501 PCB JUMPER D0 6 P6 0 JW6 0T TP502 PCB JUMPER D0 6 P5 0 JW5 0T TP506 PCB JUMPER D0 6 P5 0 JW5 0T TP507 PCB JUMPER D0 6 P6 0 JW6 0T Ref No Mark Description Part No TU701 T...

Page 68: ...RXAJR5Z0221 R125 CARBON RES 1 6W J 680 or RCX6JATZ0681 CARBON RES 1 4W J 680 RCX4JATZ0681 R126 CHIP RES 1608 1 10W J 220 RRXAJR5Z0221 R127 CHIP RES 1608 1 10W 0 RRXAZR5Z0000 MISCELLANEOUS 2L022 SCREW...

Page 69: ...BLY 3 MK12 or 0VSA13288 PINCH ARM A ASSEMBLY 4 MK12 or 0VSA13572 PINCH ARM A ASSEMBLY 5 MK12 0VSA13788 B411 PINCH SPRING MK12 0VM414644 B414 M BRAKE SP ASSEMBLY HI MK12 0VSA13655 B416 M BRAKE TU ASSEM...

Page 70: ...SEMS M2 6X4 PAN HEAD CPM39040 L1191 SCREW S TIGHT M2 6X8 WASHER HEAD GCMS9080 L1321 SCREW S TIGHT M3X6 BIND HEAD GBMS3060 L1406 AC HEAD SCREW MK9 0VM410964 L1450 SCREW SEMS M2 6X5 PAN HEAD CPM39050 L...

Page 71: ...27C 250 27C 254 HE244 249FD...

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