FUNAI 27A-850 Service Manual Download Page 12

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1-5-3

HE450DC

[6] Main CBA

(S-6)

(S-7)

[5] Deck Assembly

FE Head

Cylinder Assembly

AC Head
Assembly

TOP VIEW

From
FE Head

From
Cylinder
Assembly

From
AC Head
Assembly

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] Cylinder Shield

[8] Jack Board

(L-3)

Fig. 5

LD-SW

Hole

Shaft

Cam Gear

[6] Main CBA

[5] Deck Assembly

[6] Main CBA

SW507
LD-SW

Fig. 6

Summary of Contents for 27A-850

Page 1: ...vicing 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...

Page 2: ...Disassembly Instructions 1 5 1 Electrical Adjustment Instructions 1 6 1 Block Diagrams 1 7 1 Function Indicator Symbols 1 7 11 Schematic Diagrams CBA s and Test Points 1 8 1 Waveforms 1 9 1 Wiring Dia...

Page 3: ...urst 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...

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: ...careful not to break them 1 Remove five Screws S 2 three 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 a...

Page 11: ...1 5 2 HE450DC 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 S 3 Fig 3 S 5 4 Jack CBA Desolder Fig 4...

Page 12: ...bly 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 sid...

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: ...POW SW P DOWN L 67 66 86 P DOWN L C SYNC 58 SW506 FROM TO VIDEO BLOCK FROM TO Hi Fi AUDIO BLOCK TO AUDIO BLOCK 1 7 1 1 7 2 HE4F0BLS SDA SDA SCL SCL TU701 TUNER UNIT IC503 MEMORY 72 32 19 83 IIC BUS S...

Page 15: ...REC VIDEO SIGNAL PB VIDEO 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 55 52 19 20 JK101 V OUT1 V IN1 19 20 JK102 CL151 CL152 CL101 CL102...

Page 16: ...R IN2 IN1 R ALC DET ALC IC301 AUDIO 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 HEA...

Page 17: ...2 L A IN2 R Hi Fi AUDIO SIGNAL PROCESS 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 7 1 7 8 Hi Fi AUDIO R HEAD Hi Fi AUDIO L HEAD CYLINDE...

Page 18: ...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 HE4F0BLP...

Page 19: ...88 88 ON POWER ON PWR ON REC REC ON REC PAUSE REC Blinks at 0 8Hz interval T REC OTR ON T REC OFF T REC incomplete Blinks at 0 8Hz interval When reel and capstan mechanism is not functioning correctly...

Page 20: ...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 21: ...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 22: ...Main 1 6 Schematic Diagram 1 8 3 1 8 4 HE4F0SCM1...

Page 23: ...Main 2 6 Sensor Schematic Diagram 1 8 5 1 8 6 HE4F0SCM2...

Page 24: ...Main 3 6 Schematic Diagram 1 8 7 1 8 8 HE4F0SCM3...

Page 25: ...Main 4 6 Jack Schematic Diagram 1 8 9 1 8 10 HE4F0SCM4...

Page 26: ...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 27: ...Main 6 6 Schematic Diagram 1 8 13 1 8 14 HE4F0SCM6...

Page 28: ...1 8 15 1 8 16 AFV Schematic Diagram HE4F0SCAFV...

Page 29: ...TROUBLESHOOTING THIS TYPE POWER SUPPLY CIRCUIT A VARIABLE ISOLATION TRANSFORMER IS REQUIRED BHB300F01014 A BHB300F01014 B Sensor CBA Top View BHE470F01013 A CAUTION For continued protection against fi...

Page 30: ...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 31: ...1 8 21 1 8 22 Jack CBA Top View Jack CBA Bottom View BHE470F01013 C...

Page 32: ...1 8 23 1 8 24 AFV CBA Top View AFV CBA Bottom View BHC400F01091 Sub Jack CBA Top View Sub Jack CBA Bottom View BHE470F01013 B...

Page 33: ...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 34: ...5 6 7 8 9 10 11 12 CL151 CL101 CAPSTAN 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...

Page 35: ...F SW Video Head Switching Pulse H L 19 OUT HiFi H SW HiFi Audio Head Switching Pulse H L 20 N U Not Used IN DAVN L VPS PDC Data Receive L L 21 N U Not Used 22 N U Not Used 23 N U Not Used 24 N U Not U...

Page 36: ...Motor Control Signal PWM 78 OUT C F R Capstan Motor FWD REV Control Signal FWD L REV H H L 79 IN S REEL Supply Reel Rotation Signal PUL SE 80 IN T REEL Take Up Reel Rotation Signal PUL SE 81 OUT LM F...

Page 37: ...5 GR TPE2 2SC3266 Y TPE2 2SC2120 Y TPE2 KTC3203 Y 2SC1815 BL TPE2 2SA1020 Y KTC3205 Y 2SA1015 GR TPE2 E C B E C PT204 6B 12 MID 32A22 5 4 8 1 CAT24WC04JI BR24C04F W B1 E B2 C1 C2 RN1511 TE85R FMG4A T1...

Page 38: ...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 Standard M...

Page 39: ...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 40: ...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 41: ...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 42: ...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 43: ...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 44: ...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 45: ...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 46: ...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 47: ...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 48: ...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 49: ...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 50: ...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 51: ...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 52: ...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 53: ...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 54: ...SECTION VIDEO CASSETTE RECORDER 27A 850 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 Section...

Page 55: ...3 1 1 HE450FEX A1X EXPLODED VIEWS Front Panel...

Page 56: ...022 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 2L041 MAIN CBA 2L041 2B7 2B8 2B46 SENSOR CBA 2B5 2L051 AFV CBA S...

Page 57: ...3 1 3 HE4F0PEX Some Ref Numbers are not in sequence X2 X3 X20F X20E X20D X20C X20B X20A X1 X4 S1 Unit S3 A14 S2 S2 Packing...

Page 58: ...t 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 B86 Mark Description F...

Page 59: ...1 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 B...

Page 60: ...5 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...

Page 61: ...TOP CASE 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...

Page 62: ...6V M H7 CE1CMAVSL100 C061 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 C157 ELECTROLYTIC CAP 1 F 50V M H7...

Page 63: ...3pF 50V CHD1JJ3CG330 C419 CHIP CERAMIC CAP B K 4700pF 50V CHD1JK30B472 Ref No Description Part No C421 ELECTROLYTIC CAP 33 F 6 3V M H7 CE0KMAVSL330 C422 ELECTROLYTIC CAP 4 7 F 25V M H7 CE1EMAVSL4R7 C4...

Page 64: ...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 C564 CHIP CERAMIC CAP CH J 100pF 50V or CHD1JJ3CH101 CHIP CERAMIC...

Page 65: ...0 H K 26T LLAXKATTU101 Ref No Description Part No L561 INDUCTOR 68 H K 26T LLAXKATTU680 L562 INDUCTOR 56 H K 26T LLAXKATTU560 L701 INDUCTOR 10 H K 26T LLAXKATTU100 L702 CHOKE COIL 47 H K or LLBD00PKV0...

Page 66: ...RCX4JATZ0122 R064 CARBON RES 1 4W J 1 2k RCX4JATZ0122 Ref No Description Part No R065 CARBON RES 1 4W J 1 2k RCX4JATZ0122 R066 CHIP RES 1608 1 10W J 47k RRXAJR5Z0473 R067 CARBON RES 1 4W J 680 RCX4JA...

Page 67: ...R514 CHIP RES 1608 1 10W J 820 RRXAJR5Z0821 R515 CARBON RES 1 6W J 1k or RCX6JATZ0102 CARBON RES 1 4W J 1k RCX4JATZ0102 Ref No Description Part No R516 CHIP RES 1608 1 10W J 330k RRXAJR5Z0334 R517 CHI...

Page 68: ...3 REMOTE RECEIVER PIC 37042LQ USESJRSKK038 T001 SWITCHING TRANSFORMER CSA SW0233A LTT00EPSA135 TP301 PCB JUMPER D0 6 P10 0 JW10 0T TP501 PCB JUMPER D0 6 P6 0 JW6 0T TP502 PCB JUMPER D0 6 P5 0 JW5 0T T...

Page 69: ...ACITORS C1 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 C4 CHIP CERAMIC CAP CH J 56pF 50V or CHD1JJ3CH560...

Page 70: ...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 ASSEMBLY HI MK12 0VSA13449 B417 TENSION SPG 3002654...

Page 71: ...HEAD GBMS3060 L1341 SCREW P TIGHT 2X8 PAN HEAD GPMP2080 L1406 AC HEAD SCREW MK9 0VM410964 L1450 SCREW SEMS M2 6X5 PAN HEAD CPM39050 L1466 SCREW S TIGHT M2 6X6 BIND HEAD GBMS9060 L1467 SCREW S TIGHT M...

Page 72: ...27A 850 HE4F0ED...

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