Centrum GEB100 Service Manual Download Page 1

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SERVICE MANUAL

VIDEO CASSETTE RECORDER

GEB100

Sec. 1: Main Section

Specifications

Preparation for Servicing

Adjustment Procedures

Schematic Diagrams

CBA’s

Exploded views

Parts List

Sec. 2: Deck Mechanism Section

Standard Maintenance

Alignment for Mechanism

Disassembly/Assembly of Mechanism

Alignment Procedures of Mechanism

Deck Exploded Views

Deck Parts List

PA L

Summary of Contents for GEB100

Page 1: ...on for Servicing I Adjustment Procedures I Schematic Diagrams I CBA s I Exploded views I Parts List Sec 2 Deck Mechanism Section I Standard Maintenance I Alignment for Mechanism I Disassembly Assembly...

Page 2: ...structions 1 6 1 Block Diagrams 1 7 1 Function Indicator Symbols 1 7 5 Schematic Diagrams CBA s and Test Points 1 8 1 Waveforms 1 9 1 Wiring Diagrams 1 10 1 IC Pin Function Descriptions 1 11 1 Lead Id...

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: ...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 3...

Page 5: ...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 ON...

Page 6: ...chine then apply hot air to the Flat Pack IC about 5 to 6 seconds Fig S 1 1 2 Remove 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 C...

Page 7: ...e flat pack IC When you use solder flux which is applied to all 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...

Page 8: ...nce 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 static electricity that may be...

Page 9: ...nto the 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 S INH to GND This will stop the function of T...

Page 10: ...L 1 and L 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 reassembl...

Page 11: ...1 5 2 HG240DC Fig D1 S 1 S 1 S 1 1 Top Case Fig D2 L 2 L 1 2 Front Assembly L 2 Fig D3 S 2 S 2 S 4 S 2 S 2 S 3 S 3 3 VCR Chassis Unit Fig D4 S 5 4 Jack CBA Desolder...

Page 12: ...ead From Cylinder Assembly From ACE Head Assembly Lead with white stripe Lead with blue stripe Desolder from bottom Lead with blue stripe From Capstan Motor Assembly Lead connections of Deck Assembly...

Page 13: ...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 position during playback Symptom of Misadjus...

Page 14: ...OCK TO AUDIO BLOCK SDA SDA 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 IIC BUS SCL 71 3 5 SDA SCL 12 11 CAS LED TIMER LED REC LED 26 25 24 P...

Page 15: ...DEO 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 CN151 CN152 CN101 CN102 V OUT2 V IN2 61 63 96 95 9...

Page 16: ...REC CN504 4 A COM 6 AE H 5 AE H FE H AUDIO HEAD AUDIO ERASE HEAD ACE HEAD ASSEMBLY FE HEAD 2 FE H 1 FE H GND CN501 MAIN CBA PB AUDIO SIGNAL REC AUDIO SIGNAL Mode SP REC 71 A MUTE H AUDIO SW 1 AUDIO SW...

Page 17: ...IC001 ERROR VOLTAGE DET Q002 Q003 Q001 F001 L003 LINE FILTER BRIDGE RECTIFIER D001 D004 1 2 3 4 Q004 AC001 T001 P ON 44V P ON 15V 12 P ON H AL 12V 20 5V AL 12V AL 5V TIMER 5V P ON 5V P DOWN L Q051 Q05...

Page 18: ...d by H One touch recording H Timer recording H General mode L REC REC mode H REC pause General mode L Blinks at 0 8Hz interval When reel and capstan mechanism is not functioning correctly A R is displ...

Page 19: ...ror occurs When reel and capstan mechanism is not functioning correctly When tape loading mechanism is not functioning cor rectly When cassette loading mechanism is not functioning correctly When the...

Page 20: ...umber is shown in the parts list and may be slightly different or amended since these drawings were prepared 2 All resistance values are indicated in ohms K 103 M 106 3 Resistor wattages are 1 4W or 1...

Page 21: ...re prepared 2 To maintain original function and reliability of repaired units use only original replacement parts which are listed with their part numbers in the parts list section of the service manu...

Page 22: ...1 8 3 1 8 4 HG221SCM1 Main 1 5 Schematic Diagram...

Page 23: ...Main 2 5 Sensor Schematic Diagrams 1 8 5 1 8 6 HG221SCM2...

Page 24: ...Main 3 5 Schematic Diagram 1 8 7 1 8 8 HG221SCM3...

Page 25: ...Main 4 5 Jack Schematic Diagrams 1 8 9 1 8 10 HG221SCM4...

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 F001 is blown check to see that all componen...

Page 27: ...ING 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 voltage or Auto...

Page 28: ...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 29: ...1 8 17 1 8 18 Jack CBA Top View Jack CBA Bottom View BHG470F01014C...

Page 30: ...WAVEFORMS U29WFPAL 1 9 1 WF3 V OUT E E 10 s 50mV x 10 J23 WF3 UPPER WF1 LOWER V OUT 0 1V x 10 RF SW 0 5V x 10 50 s J23 TP502 WF2 C PB 10mV x 10 RF SW 0 5V x 10 5ms UPPER LOWER WF1 TP502 TP301...

Page 31: ...504 GND 1 V OUT1 2 AL 12V 1 3 V IN1 4 5 A OUT1 6 JK1 8P OUT 7 A IN1 1 2 3 4 5 6 7 CN151 CN101 CAPSTAN MOTOR FULL ERASE HEAD FE HEAD GND 1 V OUT2 2 NU 3 V IN2 4 GND 5 A OUT2 6 SC2 IN 7 A IN2 8 1 2 3 4...

Page 32: ...23 OUT POWER LED POWER LED Signal Output H 24 OUT CAS LED CASSETTE LED Signal Output H 25 OUT TIMER LED TIMER LED Signal Output H 26 OUT REC LED Recording LED Control Signal 27 N U Not Used 28 N U No...

Page 33: ...REEL Supply Reel Rotation Signal PULSE 80 IN T REEL Take Up Reel Rotation Signal PULSE 81 OUT LM FWD REV Loading Motor Control Signal H L Hi z 82 N U Not Used 83 OUT A MUTE Audio Mute Control Signal...

Page 34: ...BN1F4M T BN1L4M T KRA103M KRA104M KRC103M KTA1266 GR KTA1281 Y KTC3199 BL GR Y 2SA1015 GR TPE2 2SA1020 Y 2SC1815 BL TPE2 2SC1815 GR TPE2 2SC1815 Y TPE2 2SC2120 Y TPE2 KTA1267 GR Y KTC3203 Y BR24L02F...

Page 35: ...1 13 1 HG221FEX EXPLODED VIEWS Front Panel A1X...

Page 36: ...r parts with this mark Some Ref Numbers are not in sequence 2B18 A2 2L011 2L011 2L011 2L011 2L011 2B9 2B9 2L022 2L022 2L012 JACK CBA A5 2L041 MAIN CBA A10 2L031 2L099 2L041 2B7 SENSOR CBA 2B8 2B46 A7...

Page 37: ...1 13 3 HG221PEX Packing Some Ref Numbers are not in sequence X2 X3 X20C X20B X20A X1 X4 S1 Unit S3 A14 S2 S2...

Page 38: ...See Electrical Parts List 2B46 ROHM HOLDER H7770JD See Electrical Parts List 2B9 CUSHION HC460ED 0VM413251 2B18 FIBER TOP CASE HC460ED 0VM412906 2L011 SCREW P TIGHT 3X10 BIND HEAD GBCP3100 2L012 SCREW...

Page 39: ...30F104 CHIP CERAMIC CAP FZ Z 0 1 F 50V CHD1JZ3FZ104 C152 CHIP CERAMIC CAP 1608 F Z 0 1 F 50V or CHD1JZ30F104 CHIP CERAMIC CAP 1608 F Z 0 1 F 25V or CHD1EZ30F104 CHIP CERAMIC CAP FZ Z 0 1 F 50V CHD1JZ3...

Page 40: ...CHD1JK30B223 CHIP CERAMIC CAP 1608 B K 0 022 F 25V CHD1EK30B223 Ref No Description Part No C418 CHIP CERAMIC CAP 1608 CH J 33pF 50V or CHD1JJ3CH330 CHIP CERAMIC CAP CG J 33pF 50V CHD1JJ3CG330 C419 CHI...

Page 41: ...CHING DIODE 1SS133 T 77 QDTZ001SS133 D011 RECTIFIER DIODE BA158 NDQZ000BA158 D012 RECTIFIER DIODE FR202 B P NDQZ000FR202 D013 RECTIFIER DIODE FR202 B P NDQZ000FR202 D014 SCHOTTKY BARRIER DIODE SB140 o...

Page 42: ...STOR RN1511 TE85R QQ2Z00RN1511 Q406 CHIP TRANSISTOR KTC3875Y RTK NQ1Y0KTC3875 Q501 TRANSISTOR KTC3199 BL or NQS50KTC3199 Ref No Description Part No TRANSISTOR 2SC1815 BL TPE2 QQS202SC1815 Q503 PHOTO T...

Page 43: ...JATZ0330 R323 CARBON RES 1 6W J 33 or RCX6JATZ0330 Ref No Description Part No CARBON RES 1 4W J 33 RCX4JATZ0330 R324 CHIP RES 1608 1 10W J 47k RRXAJR5Z0473 R325 CHIP RES 1608 1 10W J 33 RRXAJR5Z0330 R...

Page 44: ...JATZ0102 R706 CHIP RES 1608 1 10W J 1k RRXAJR5Z0102 R851 CHIP RES 1608 1 10W J 1 5k RRXAJR5Z0152 R852 CHIP RES 1608 1 10W J 1k RRXAJR5Z0102 R853 CHIP RES 1608 1 10W J 1k RRXAJR5Z0102 Ref No Descriptio...

Page 45: ...2 TRANSISTOR KTA1266 GR or NQS40KTA1266 TRANSISTOR 2SA1015 GR TPE2 QQS102SA1015 RESISTORS R101 CARBON RES 1 4W J 1k RCX4JATZ0102 R102 CARBON RES 1 4W J 1k RCX4JATZ0102 R105 CARBON RES 1 6W J 4 7k or R...

Page 46: ...ical Alignment Procedures 2 3 1 Disassembly Assembly Procedures of Deck Mechanism 2 4 1 Alignment Procedures of Mechanism 2 5 1 Deck Exploded Views 2 6 1 Deck Parts List 2 7 1 Sec 2 Deck Mechanism Sec...

Page 47: ...DECK ADJUSTMENTS 3 For the reference numbers listed above refer to Deck Exploded Views B73 Recording model only B86 Not used in 2 head model H Hours Cleaning I Replace Deck Periodic Service Schedule...

Page 48: ...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 c...

Page 49: ...Alignment Tape FL6N8 2 Head model FL6NS8 4 Head model Azimuth and X Value Adjustment of ACE Head Adjustment of Envelope Waveform J 2 Guide Roller Adj Screwdriver Available Locally Guide Roller J 3 Mi...

Page 50: ...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 turn...

Page 51: ...ere is no slack on the supply and take up side Guide Rollers Use a blank tape Adjust the height of the Guide Rollers Supply side and take up side Use a blank tape Page 2 3 3 Loading Use a blank tape A...

Page 52: ...e ACE Head Fig M6 1 B X Value Alignment Purpose To obtain maximum PB FM envelope signal at the pre set position of the Tracking Control Circuit align the Horizontal Position of the ACE Head Symptom of...

Page 53: ...comes as flat as possible To do this adjust ment turn the top of the Guide Roller with the Guide Roller Adj Screwdriver 3 If the envelope is as shown in Fig M7 adjust the height of Guide Roller 2 Refe...

Page 54: ...f pushes to ensure preset position The number of pushes CH UP button to achieve 1 2 level of envelope should match the number of pushes CH DOWN button from center If required redo the X Value Alignmen...

Page 55: ...sembly T DM1H DM7H Desolder LDG Belt 2 S 3 9 9 ACE Head Assembly T DM1H DM7H S 4 10 2 Tape Guide Arm Assembly T DM1H DM8H 1 P 2 11 10 C Door Opener T DM1H DM8H 1 S 4A L 4 12 11 Pinch Arm B T DM1H DM8H...

Page 56: ...Arm B DM2H DM14H P 5 34 26 Loading Arm SP Assembly B DM2H DM14H Refer to Alignment Sec Page 2 5 1 35 34 Loading Arm TU Assembly B DM2H DM14H Refer to Alignment Sec Page 2 5 1 36 16 26 M Brake TU Asse...

Page 57: ...2 4 3 U29PHSDA 14 13 11 10 12 7 49 8 32 43 41 40 31 42 45 44 46 9 36 15 38 37 Fig DM1H Top View 34 19 35 25 26 24 23 27 33 20 28 22 Fig DM2H Bottom View...

Page 58: ...Fig DM4H Pull up Slide 1 2 A 3 6 6 L 2 Pin A Hole A Pin B Hole B L 1 First insert 6 diagonally in 3 as shown below Then install 6 in 3 while pushing L 1 in a direction of arrow After installing 6 in 3...

Page 59: ...h White Stripe A 8 Fig DM7H 11 13 12 10 L 4 P 3 P 2 Fig DM8H 1 Pin of 12 Pin of 10 Groove of 27 View for A When reassembling 10 and 12 confirm that pin of 10 and pin of 12 are in the groove of 27 as s...

Page 60: ...to Fig A Fig A 13 12 P 3 Fig B Top view Install pin of 12 in groove of 27 Refer to Fig B 27 Hold 12 and 13 till groove of pin of chassis looks and fit 13 in notch of chassis Then turn a few 13 while...

Page 61: ...2 4 7 U29PHSDA 19 Cap Belt S 8 19 20 Cap Belt A Installation position of Cap Belt View for A Fig DM11H L 6 22 20 C 1 21 27 Pin on 22 Position of pin on 22 turn Fig DM12H...

Page 62: ...47 First groove on 27 Align 26 and 27 as shown Pin of 36 Pin of 33 Position of Mode Lever when installed Pin of 37 Bottom View Installation of 26 When reassembling 27 meet the first groove on 27 to t...

Page 63: ...2 4 9 U29PHSDA 39 L 10 37 P 6 43 38 36 42 40 41 C 6 C 7 turn turn turn Fig DM15H 44 45 46 L 11 Fig DM16H Slide Plate S 11 47 48 Slide Fig DM17H...

Page 64: ...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 65: ...MH D Blue grease SLIDUS OIL 150 Some Ref Numbers are not in sequence B12 B492 B11 B571 B37 B126 B8 B121 L1450 L1450 L1466 B501 Chassis Assembly Top View Lubricating Point Chassis Assembly Bottom View...

Page 66: ...low grease B499 B516 B52 B507 B559 B581 B583 B580 B582 A View for A B578 B579 B579 B133 B551 Bottom Side Grease point Some Ref Numbers are not in sequence B488 B491 B513 Bottom Side Grease point L1151...

Page 67: ...anism View 3 Mark Description Floil G 684G or Multemp MH D Blue grease SLIDUS OIL 150 L1341 L1321 B347 L1321 B355 B354 B482 B483 B425 B303 B555 B563 B300 B562 B514 B313 Some Ref Numbers are not in seq...

Page 68: ...B499 T LEVER HOLDER MK12 0VM305729 B501 WORM HOLDER MK12 or 0VM203767 WORM HOLDER R MK12 0VM204324 B507 REEL WASHER MK9 5 2 1 0 5 0VM410058 B508 S BRAKE SPRING HI MK12 0VM414899 B513 P S W F 6 2 55 0...

Page 69: ...GEB100 HG221ED 2004 04 15...

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