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JVC HR-J282EU, Service Manual

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JVC HR-J282EU Service Manual Download Page 62

MECHANISM TROUBLESHOOTING GUIDE

4-27

Cassette will not load.

Does the CST insert?

Does the opener Lid work?

Is the opener Door assembled correctly?

Replace the Opener Lid.

Replace the Arm Assembly F/L.

Check the power of L/D Motor.

Is the Holder Assembly Cassette

assembled correctly?

Replace the Gear Rack F/L.

Does the Gear Assembly Rack F/L
work?

Does the Opener Door work?

Does the Arm Assembly F/L work?

Does the L/D Motor work?

Does the Holder Assembly Cassette

move the Arm Assembly F/L?

Replace the Front Loading 

Mechanism Assembly.

YES

YES

YES

YES

NO

NO

NO

YES

NO

YES

NO

YES

NO

C.

Summary of Contents for HR-J282EU

Page 1: ... 180 sec with E 180 cassette Dimensions W x H x D 360 mm x 94 5 mm x 270 mm Weight 4 0 kg Operating temperature 5 C to 35 C Operating humidity Less than 80 Timer 24 hours display type VIDEO Signal system PAL type colour signal and CCIR monochrome signal 625 lines 50 fields Recording Format PAL MESECAM RF reception PAL B G SECAM B G RF OUT PAL G RF modulator UHF channels 22 68 Adjustable Input leve...

Page 2: ......

Page 3: ...t SMPS 3 4 2 Servo Circuit 3 7 3 System Front Panel Circuit 3 10 4 Y C Circuit 3 12 5 Tuner IF Circuit 3 16 6 Hi Fi Circuit 3 19 BLOCK DIAGRAMS 3 21 1 Power Block Diagram 3 21 2 Tuner IF NICAM A2 Block Diagram 3 23 3 VPS Block Diagram 3 24 4 Y C Block Diagram 3 25 5 Hi Fi Block Diagram 3 26 6 System Block Diagram 3 27 CIRCUIT DIAGRAMS 3 29 1 Power Circuit Diagram 3 29 2 Tuner NICAM A2 Circuit Diag...

Page 4: ... LD LED LD VTG CTL Loading Voltage Control LECHA Letter Character L M Level Meter LP Long Play LPF Low Pass Filter M MAX Maximum MD Modulator MECHA CTL Mechanism Control MIC Microphone MIN Minimum MIX Mixer Mixing M M Monostable Multivibrator MMV Mono Multi Vibrator MOD Modulation Modulator MODEM Modulator Demodulator MPX Multiplex N NR Noise Reduction O OSC Oscillator OSD On Screen Display P PB P...

Page 5: ...e specified for compliance with recognized codes pertaining to X ray emission Consequently when servicing these products replace the cath ode ray tubes and other parts with only the specified parts Under no circumstances attempt to modify these circuits Unauthorized modification can increase the high voltage value and cause X ray emission from the cathode ray tube 12 Crimp type wire connector In s...

Page 6: ...eter to measure across both terminals of load Z See figure 9 and following table 2 5 Grounding Class 1 model only Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts Video in Video out Audio in Audio out or Fixing screw etc Measuring Method Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts See figure ...

Page 7: ...ontrol are switched to Low As a result POWER Switching TR is kept from generating heat and fire POWER for each IC S 5V POWER SECAM IC Series 5VT POWER AVCP IC P Y I 5V POWER Modulator Series 5VT POWER AVCP IC Short protection off mode DJ01 Diode in PROPOSAL FOR APPLYING SHORT PROTECTION IIC BUS 5VT SW POWER CONTROL MASTER TIMER CONTROL 5VT SW SLAVE with 5V SLAVE with 5V 5 3VA Timer Control AVCP IC...

Page 8: ...r being switch all and no tapes OK is displayed at FLD for FLD models and LED becomes on for LED CLOCK models This is the state that initializing EEPROM is finished In case of PAL VCP if holding the REC button on the front panel and the MENU button on the remote control handset for 5 7 seconds with power being off and no tapes All the LED DOTs become on This is the state that initializing EEPROM i...

Page 9: ...0000000 C0 00 00000000 C8 00 00000000 B7 00 00000000 00 00 00000000 50 00 00000000 HR J582EU 0C 00 00000000 C0 00 00000000 C0 00 00000000 B7 00 00000000 00 00 00000000 50 00 00000000 HR J583EU 0C 00 00000000 C0 00 00000000 C8 00 00000000 B7 00 00000000 00 00 00000000 50 00 00000000 Remote control Key action OK Now option data write to EEPROM MENU Menu exit EDIT Option data change from 0 F Hexadeci...

Page 10: ... hours display type Video Television system CCIR standard 625 lines 50 fields PAL colour signal Recording format PAL B G HR J282EU J283EU J582EU J583EU J285EU J290EU 293EU J585EU J590EU J593EU PAL N HR J295EK J595EK PAL SECAM L HR J295MS J595MS Input level VIDEO IN SCART RCA type 1 0 Vp p 75 ohm unbalanced Output level VIDEO OUT SCART type 1 0 Vp p 75 ohm unbalanced Signal to noise ratio More than...

Page 11: ...o No 1 Re assembly Flow 3 Place the unit like Fig 2 1 4 Check and replace Electrical parts NOTE 1 Insert Video Cassette Tape inversely like Fig 2 1 to check and replace defective parts 2 In disassembling and reassembling be careful not to damaged CST switch Timer C B A Main C B A Housing Deck Assembly Timer C B A Housing Deck Ass y Cassette Tape Upside Down Main C B A Positioned Upside Down ...

Page 12: ...330 323 A43 283 280 284 277 300 T U 7 0 1 T U N E R 2SCART 1SCART 452 320 452 452 A42 A49 281 250 462 462 A00 275 LED502 LED501 457 464 A 5 4 3 2 1 B C D NOTE Refer to SECTION 5 REPLACEMENT PARTS LIST in order to look for the part number of each part OPTIONAL PARTS ...

Page 13: ...806 PLUG ASS Y 2WAY Optional parts 812 PLUG ASS Y 1WAY Optional parts 811 REMOCON 900 PACKING RF 803 PACKING LF 803 BOX CARTON 802 BAG SOFR SHEET 804 INSTRUCTION MANUAL 801 SCART CABLE 821 NOTE Refer to SECTION REPLACEMENT PARTS LIST NOTE in order to look for the part number of each part 2 3 ...

Page 14: ...RT JACK Hi Fi SYSTEM AVCP Micom T U N E R Speak ez SW IC SECAM VPS EEPROM CLK IC W501 H S W E2PROM C S M P S A V W502 DISPLAY DOT CLK Measurement point Adjustment point SECTION 3 ELECTRICAL ELECTRICAL ADJUSTMENT POINTS ARRANGEMENT ...

Page 15: ...l c Press the Auto PG Key on JIG Remocon again 2 nd or press Play key on set and 0 key on Remocon again Then check the blink 4 Dot LED At regular 0 25sec internal Then check blink PG waveform on oscilloscope MONO Model Check the PG a Connect the CH1 of the oscilloscope to the H SW and CD2 to the Video out for the VCR b Trigger the mixed Video Signal of CH2 to the CH1 H SW W501 W502 and then check ...

Page 16: ...LECTRICAL ADJUSTMENT PROCEDURES WAVEFORM Attension and Reference a The PG checking must do when RF Level is Maximum and SERVO system is Locking MTR MODE b V H SW Level is 2Vpp H SW Composite VIDEO 6 5H 416us ...

Page 17: ... 7 Is there DC voltage at the IC101 Pin 4 Is there about 2 5V at the IC103 Vref Is the D106 normal Check the Main PCB 5 3VA Line short Replace the F101 Use the same Fuse Replace the BD101 Replace the R101 Is Vcc about 13 15V permittable at the IC101 Pin 3 Check or Replace the D103 Replace the IC102 Replace the IC103 Replace the D106 NO YES YES YES YES YES YES YES YES NO NO NO NO NO NO NO ...

Page 18: ...s 5 3VA work normally Check whether 5 3VA is out of order YES NO NO 7 Power Circuit SMPS 2 No 12VA Capstan 3 No 12VA CANAL Buffer Is Voltage about 12V put into the Q155 C Check or Replace the Q155 YES YES No 12VA Is Vcc about 13VA put into the Q155 E Replace the Peripheral Circuitry of D160 YES NO ...

Page 19: ...out 4 7V put into the Q152 Q151 Base Check the Q163 Q162 whether it works normally Check or Replace the Q152 Q151 YES YES No 5VT 5V Is the Q163 Q162 Base H Is 5 3VA put into the Q152 Q151 collector Check the µ com Control YES YES NO NO 3 6 ...

Page 20: ...pear at IC501 pin 8 Does the CFG divide waveform appear at IC501 pin 9 Do the CTL pulses move when TRK is operated Replace IC501 Does the Video Envelope waveform appear at IC501 Pin 24 NO YES YES YES YES YES A Is the height of the CTL Head adjusted correctly NO Replace IC501 NO Check AVCP IC NO Adjust the CTL Head ...

Page 21: ... PWM waveform appear at IC501 Pin 107 Check the Components and foil Pattern Connected to IC501 Pin 107 PMC01 Pin 12 for shorts Do DFG Pulses appear at IC501 Pin 104 B NO NO NO NO Check Power Does Drum PWM appear at IC501 Pin 107 Do DFG Pulses appear at PMD01 Pin 3 Check Drum Monitor Ass y Check the Components and foil pattern between PMC01 Pin 11 and IC501 Pin 104 for shorts Replace IC501 YES YES ...

Page 22: ...e IC501 Does 13VA appear at PMC01 Pin 2 Does 2 8V appear at PMC01 Pin 9 Check Connector and Capstan Motor Ass y Check the Components and foil Patterns Connected between IC501 Pin 108 and PMC01 Pin 9 for shorts Does the CFG signal appear at IC501 Pin 9 Does Capstan PWM appear at IC501 Pin 108 Check the components and foil pattern connected between IC501 Pin 108 and PMC01 Pin 9 for shorts C NO NO NO...

Page 23: ...Signal Do Take up reel pulses appear at the base of Q514 Replace the Take Up Reel Photocoupler in the Deck RS501 Auto stop Does SW30 waveform appear at IC501 Pin 105 Do Take up reel pulses appear at IC501 Pin 49 Change IC501 A NO NO NO NO YES 3 System Front Panel Circuit 3 10 ...

Page 24: ...d by lack of lubrication due to dried grease or oil Is 5 4VA applied to R544 Check the power Check IC501 Pins 68 69 70 71 Check the CST SW and peripheral circuitry Check the power B NO NO NO YES NO YES Non working finction buttons Is the voltage of IC501 Pin 36 5V Does LED Ass y display change when a function button is pressed Replace IC501 Replace the defective switch Check the power Check IC506 ...

Page 25: ... signal appear at the Emitter termi nal of the Q307 Q308 Check the 5 2VT 5 4VA Line Power Circuit Is I2 C BUS signal applied to the IC301 Pins 68 69 Check C316 AGC Chck the path of the signal between the IC301 Pin 5 and IC501 Pin 17 Replace the IC301 Does the 12VT 5 4VA appear at the Emitter termi nal of the Q307 Q308 Replace the Q307 Q308 Check the 12VT 5 4VA Line Power Circuit Check the System C...

Page 26: ...n 105 Check the V H S W level Check R303 R304 Replace the IC301 Refer to SYSTEM I2 C BUS CHECK Trouble Shooting Is the V H S W signal applied to the IC301 Pin 70 Is V H S W H about 3 4V at the IC301 Pin 70 Clean the Drum Check the path of the Y Luminance RF signal Check C327 Check the path of the Y Luminance RF signal Check the C312 Does the Y Luminance RF signal appear at the IC301 Pin 76 Is the ...

Page 27: ...or signal appear at the IC301 Pin 25 Check the line of the 5 2VT 5 4VA Line Power Circuit Replace the X301 Check the Color Pass Check the Color Rotary Circuit IC501 pin 99 Check the Color Rotary level Check the R303 Does the X301 4 43MHZ oscillate Replace the IC301 Does the Color signal appear at the IC301 Pin 21 Is Color Rotary H about 3 4V Replace the IC301 NO YES YES YES YES NO NO NO NO NO YES ...

Page 28: ...e System of REC H the IC501 Pin 47 the D301 Replace the IC301 Check the line of the 5 2VT 5 4VA Line Power Circuit Check PB Mode Is the REC H signal about 4V applied to the IC301 Pin 80 Check the circuit of the IC301 Pins 85 86 Check REC Luminance Pass Color Pass Does PB Mdoe operate normally Does the REC RF signal appear at the IC301 Pins 88 89 94 95 Check the Drum Drum Connector YES YES YES YES ...

Page 29: ...0VT applied to TU701 Pin 16 Is 5VT applied to TU701 Pin 13 Does the Clock signal appear at TU701 Pin 11 Does the data signal appear at TU701 Pin 12 Replace Tuner Check the signal flow from TU701 Pin 24 to IC301 Pin 67 Does Sync appear at IC501 Pin111 Check the signal flow from IC501 Pin19 to JK901 Pin19 YES YES YES YES YES YES YES NO NO NO NO NO Check the liC Data signal of µ com Pin 60 NO 3 16 ...

Page 30: ...01 Pin 18 Check the Tuner Audio signal at IC301 Pin 13 Check the Audio signal at IC301 Pin 11 Check 5VT power Chekc the signal flow from TU701 Pin21 to IC301 Pin 13 Replace IC301 NO NO NO YES YES YES Check the signal flow from IC301 pin 11 to IC901 Pin 6 YES ...

Page 31: ...the Audio of IC801 Pins 2 3 Check the Audio of IC801 Pins 18 19 Check the signal flow from IC801 pins 18 19 to JK901 Pins 1 3 Check 5V power Check the Tuner Audio of TU701 Pin 21 Replace X751 Check the IIC Clock and Data at IC751 Pins 12 13 Check the signal flow from IC751 Pins 30 31 to IC801 Pins 2 3 Check the IIC Clock and Data at IC801 Pins 42 43 YES YES YES YES YES YES YES NO NO NO NO NO NO ...

Page 32: ...hen Replace IC801 Check Ports of µ COM Replace IC801 Hi Fi Playback No sound Check the Hi Fi Selection Switch and the Tape quality Is the RF Envelope at IC801 Pin 44 over 2Vp p Check the Signal path of Audio Output Do Audio signals appear at IC801 Pin 16 L CH 17 R CH Check IC801 Pin 42 Data Pin 43 Clock A YES NO YES NO NO NO NO 6 Hi Fi Circuit Hi Fi Model YES YES YES YES YES ...

Page 33: ...ts of µ COM Check Audio input signal of IC801 Pins 2 3 TU A 6 7 Scart 1 Replace IC801 B Check IC801 Pin 42 Data Pin 43 CLOCK Do Audio signals appear at IC801 Pins 16 17 YES YES YES Do FM Audio signals appear at IC801 Pin 36 Check the Contact Points of Drum Connector if good then Replace the Drum YES YES NO NO NO NO 3 20 ...

Page 34: ......

Page 35: ... Adjustment 4 14 3 Checking Torque 4 14 4 Guide Roller Height Adjustment 4 15 4 1 Preliminary Adjustment 4 15 4 2 Precise Adjustment 4 15 5 Audio Control A C Head Adjustment 4 16 5 1 Preliminary Adjustment 4 16 5 2 Confirmation of Tape Path between Pinch Roller and Take up Guide 4 17 5 3 Precise Adjustment Azimuth Adjustment 4 17 6 X Value Adjustment 4 17 7 Adjustment after Replacing Drum Assembly...

Page 36: ...ssembly P4 Chassis Embossing A 5 T 17 Opener Lid Chassis Embossing A 5 T 17 18 Arm Assembly Pinch Shaft A 5 T 17 19 Lever T Up Arm T Up 1 Hook A 5 T 17 18 20 Belt Capstan Motor Capstan 3 Screw A 6 B 21 Lever F R Locking Tab A 6 B 20 21 22 Clutch Assembly D35 Washer A 6 B 23 Break Assembly Capstan Locking Tab A 6 B 24 Gear Drive Gear Cam Washer Hook A 7 B 25 Gear Sector 1 Hook A 7 B 20 21 23 26 Pla...

Page 37: ...parate the Drum assembly 3 Unhook H1 H2 and separate the Holder FPC and Cap FPC 1 1 Drum Motor 1 Remove two Screws S2 and disassemble the Stator of the Drum Motor 2 Remove two Screws S3 and separate the Rotor of the Drum Motor from the Drum Sub assembly When reassembling confirm A portion of the Drum Sub assembly whether the Carbon Brush is in there or not Fig A 1 NOTE Fig B 1 Holder FPC Drum FPC ...

Page 38: ...e Top Arm Assembly F L Spring Lever S W Gear Assembly Rack F L Chassis Opener Door Brackert Assembly L D Motor Holder Assembly CST B C D E H6 A B Lever Assembly S W H8 Fig A 2 Fig A 2 1 Fig A 2 2 Fig A 2 6 Fig A 2 7 Fig A 2 5 Fig A 2 3 Fig A 2 4 ...

Page 39: ...remove it through the guide hole of the chassis 5 Bracket assembly L D Motor Fig A 2 4 1 Unplug the Connector C1 2 Unhook three Hooks H3 H4 H5 on bottom side of the Chassis lift up the Bracket assembly L M and disassem ble the Bracket assembly L D Motor 6 Gear Assembly Rack F L Fig A 2 5 1 Move the Gear Assembly Rack F L in direction of arrow A and unhook the Hook H6 pulling back in front 2 Separa...

Page 40: ...e direction and lift it up 10 Head F E Fig A 3 2 1 Breakaway the A portion of the Head F E from the Embossing of the Chassis turn it to counterclockwise direction and lift it up 11 Base assembly A C Head Fig A 3 3 1 Remove the Screw S4 and lift the Base assembly A C Head up A Arm Assembly Cleaner Base Assembly A C Head S4 Head F E A Chassis Fig A 3 Fig A 3 1 Fig A 3 3 Fig A 3 2 ...

Page 41: ...mbly RS Fig A 4 2 1 Unhook the Spring RS from the Hook H10 of the Chassis 2 Lift the Brake assembly T up 14 Arm assembly Tension Fig A 4 3 1 Unhook the Spring Tension from the Hook H11 of the Arm assembly tension 2 Unhook the Hook H12 of the Base Tension and lift the Arm assembly Tension up Difference for Springs 15 Reel S Reel T Fig A 4 4 1 Difference for Reel S Reel T Spring TB Spring RS Spring ...

Page 42: ...akaway the B portion of the Opener Lid from the Embossing of the Chassis 2 Turn the Opener Lid to clockwise direction and lift it up 18 Arm assembly Pinch Fig A 5 3 1 Lift the Arm assembly Pinch up 19 Lever T up Fig A 5 4 Arm T up Fig A 5 5 1 Unhook the Hook H13 of the bottom Chassis and lift the Lever T up up 2 Lift the Arm T up up When reassembling confirm the C portion of the Arm assembly Pinch...

Page 43: ...apstan 2 Remove the three Screws S5 on bottom Chassis and lift the Motor Capstan up 21 Lever F R Fig A 6 3 1 Unlock the Locking Tab L1 as Fig A 6 3 and lift the Lever F R up 22 Clutch assembly D35 Fig A 6 4 1 Remove the Washer W1 and lift the Clutch assembly D35 up 23 Brake assembly Capstan Fig A 6 5 1 Pull the Locking Tab L2 back in direction of arrow and lift it up Fig A 6 1 Fig A 6 2 Fig A 6 3 ...

Page 44: ...he Gear Cam Hole B in a straight line after the Gear Drive Hole C is aligned with the Chassis Hole as Fig 25 Gear Sector Fig A 7 3 1 Unhook the Hook H15 of the Base Loading on bottom Chassis and lift the Gear Sector up 26 Plate Slider Fig A 7 4 1 Just lift the Plate Slider up 27 Lever Tension Fig A 7 5 1 Unhook the A portion of the Lever Tension from the Hook H16 of the Chassis 2 Turn the Lever Te...

Page 45: ...he two Holes of the Gear assem bly P2 and P3 in a straight line after confirmation whether the Gear Sector Hole A and the Plate Slider Hole B are aligned or not as Fig 30 Base assembly P2 Fig A 8 3 Base assembly P3 Fig A 8 4 1 Move the Base assembly P2 in direction of arrow A along the Guided Hole of the Chassis and disassemble it on bottom side 2 Move the Base assembly P3 in direction of arrow B ...

Page 46: ...nsion Fig A 9 2 1 Breakaway the A portion of the Base Tension from the Embossing of the Chassis 2 Turn the Base Tension to counterclockwise direction and lift it up 33 Arm assembly Idler Fig A 9 3 1 Make narrower the two parts A and B as Fig A 9 3 2 Lift the Arm assembly Idler up When disassembling be careful not to be caught the D part by the Chassis as Fig NOTE Fig A 9 1 Fig A 9 2 Fig A 9 3 ...

Page 47: ...vice 1 Cassette Torque meter 1 PUJ42881 1 4 Post height adjusting driver Roller driver PTU94002 2 Alignment tape MHPE 3 Torque gauge 3 PUJ48075 2 3 SRK VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 ...

Page 48: ... is as below Fig C 2 4 Remove the Screw which fixes the Deck Mechanism and Main Frame and confirm if the Gear Cam is aligned with the Gear Drive as below Fig C 1 A 5 Confirm if the Mode S W on the Main P C Board is aligned as below Fig C 1 B 6 Remount the Deck Mechanism on the Main P C Board and check each operation Gear Cam Gear Drive C Mode S W B L D Motor Assembly Gear Cam Chassis Hole Gear Cam...

Page 49: ...nd Torque Gauge Adaptor with the Torque Gauge affixed The Torque reading to measure occurs when the Tape abruptly changes direction from Fast Forward of Rewind Mode when quick bracking is applied to both Reels SRK VIDEO CASSETTE TORQUE METER VHT 303 S R K V H T S SRK V HT T 300 250 200 150 50 0 300 250 200 150 50 0 100 Test Equipment Fixture Torque Gauge 600g cm ATG Torque Gauge Adaptor Cassette T...

Page 50: ...velope CH 2 NTSC SW 30Hz PAL SW 25Hz Head Switching Output Point RF Envelope Output Point Test Conditions VCR VCP State Play an Alignment Tape Adjustment Point Guide Roller Height Adjustment Screws Fig C 4 2 Fig C 4 3 P3 POST ADJUSTMENT P2 POST ADJUSTMENT Turn the Roller Guide Height Adjustment Screw slightly to flatten the waveform Tracking control at center RF ENVELOPE OUTPUT TEST POINT OSCILLOS...

Page 51: ...Screw Fig C 5 3 A C Head Tape Tape 0 2 0 25mm P4 5 1 Preliminary Adjustment Height and Tilt Adjustment Perform the Preliminary Adjustment when there is no Audio Output Signal with the Alignment Tape 1 Initially adjust the Base Assembly A C Head as shown Fig C 5 1 by using the Height Adjustment Screw B 2 Play a Blank Tape and observe if the Tape passes accu rately over the A C Head without Tape Cur...

Page 52: ... the Oscilloscope to Audio Output Jack 2 Alternately adjust the Azimuth Adjustment Screw A and the Tilt Adjustment Screw C for Maximum Output of the 6Khz segment Adjustment Procedure 5 3 Precise Adjustment Azimuth adjustment 6 X Value Adjustment Fig C 5 4 6KHZ Oscilloscope Alignment tape SP only Screw Driver Type 5mm CH 1 PB RF Envelope CH 2 NTSC SW 30Hz PAL SW 25Hz Head Switching Output Test Poin...

Page 53: ... Mechanism Condition Play the blank tape Play an alignment tape Adjustment Points Guide Roller Precise Adjustment Switching Point Tracking Preset X Value Checking Adjustment Procedure Play a blank tape and check for tape curling or creasing around the roller guide If there is a problem then follow the procedure 4 Guide Roller Height and 5 Audio Control A C Head Adjustment RF ENVELOPE OUTPUT TEST P...

Page 54: ... pinch roller If locations marked with o do not operate normally after cleaning check for wear and replace See the EXPLODED VIEWS at the end of this manual as well as the above illustrations See the Greasing Page 4 22 for the sections to be lubricated and greased NOTE o o o o Dirt on video head Dirt on tape transport system Low volume Sound distorted Tape does not run Tape is slack o In Review and...

Page 55: ...yl Alcohol Touch the cleaning patch to the head tip and gently turn the head rotating cylinder right and left Do not move the cleaning patch vertically Make sure that only the buckskin on the cleaning patch comes into contact with the head Otherwise the head may be dam aged Thoroughly dry the head Then run the test tape If lso propyl Alcohol remains on the video head the tape may be damaged when i...

Page 56: ...1 Loading Path Inside Top side 2 Base Tension Boss inside Hole 3 Arm Assembly F L U Groove 4 Arm Take up Rubbing Section 5 L D Motor Gear Wheel Part 6 Shaft 7 Arm Assembly F L of Buming Inside Hole 8 Reel S T Shaft G381 Yellow 9 Brake T Groove Guide Rail Base Loading Gear Drive Gear Sector Gear Cam Gear Part Bracket Side L Bracket Assembly Door 5 7 8 1 2 6 4 3 1 Loading Path Inside Top side 2 Shaf...

Page 57: ...4 22 GEAR F R GEAR AY P2 P3 ...

Page 58: ...d sensor Check syscon circuit NO YES YES YES NO NO NO 1 Deck Mechanism A NO NO NO No F R modes Is the present mode F R Mode Is the mode SW assembled correctly refer to Pages 4 14 Is the normal voltage supplied to the Capstan Motor Vcc1 Vcc2 Does terminal voltage Vctl of Capstan Motor supply side more than 4V Check Servo Power Circuits Replace the Capstan Motor Does the Capstan Motor rotate Do the ...

Page 59: ...age 4 14 Check spring Pinch Replace Drum Motor Check Servo Syscon Check the Syscon µ COM No cassette loading Insert the cassette Check Holder Assembly CST Is there variation for CST IN S W Output In Tape with REC Tab L H L In Tape without REC Tab L H L H Does the CST IN S W work normally Does the lever Assembly S W work normally Check Syscon Circuit Check Syscon Circuit Replace CST IN S W YES YES ...

Page 60: ...ensors ok Check Syscon Circuit Check Syscon Circuit Check Servo Syscon Does the Capstan Motor turn Is the terminal voltage of the Drum Motor more than 2 3V Replace the Drum Motor Is the Vcc voltage of the Drum Motor normal Check the clutch and the Idler Assembly YES YES YES YES YES YES YES YES NO NO NO NO NO Is the terminal voltage of Capstan Motor supplied more than 4V Replace the Capstan Motor I...

Page 61: ... C Board 5V YES Is there a short circuit between cassette switch and GND on main P C Board Remove the short circuit part or Replace the main P C Board NO Check Mode switch location and syscon circuit Replace CST IN Switch YES NO YES NO NO Replace CST IN Switch NO NO Cassette will not eject Does the L D motor rotate in reverse Check L D Motor or Drive IC Replace lever Assembly Switch Does the Lever...

Page 62: ...embly F L Check the power of L D Motor Is the Holder Assembly Cassette assembled correctly Replace the Gear Rack F L Does the Gear Assembly Rack F L work Does the Opener Door work Does the Arm Assembly F L work Does the L D Motor work Does the Holder Assembly Cassette move the Arm Assembly F L Replace the Front Loading Mechanism Assembly YES YES YES YES NO NO NO YES NO YES NO YES NO C ...

Page 63: ...4 28 EXPLODED VIEWS 117 103 105 117 100 106 107 A21 114 113 112 110 115 A24 116 102 A23 032 A22 109 054 054A 1 Front Loading Mechanism Section ...

Page 64: ...IEWS 4 29 401 402 001 008 001 031 079 017 032 024 406 020 021 028 019 018 029 030 026 A03 A04 A01 002 002A 025 027 022 003 004 006 007 010 405 014 015 009 409 013 023 016 405 012 402 2 Moving Mechanism Section 1 ...

Page 65: ...EXPLODED VIEWS 4 30 051 052 517 061 056 058 518 052A 055 060 410 070 069 076 032 077 068 064 066 065 067 A11 078 A12 3 Moving Mechanism Section 2 ...

Page 66: ...MEMO ...

Page 67: ......

Page 68: ...VICTOR COMPANY OF JAPAN LIMITED VIDEO DIVISION Printed in Japan S40894 ...

Page 69: ...CAM TIMER H D155 SNUBBER BLOCK IC101 R109 C135 D103 R103 C109 R125 R126 D102 R104 C105 C106 D109 C120 L104 C121 NOTES Symbol denotes AC ground Symbol denotes DC chassis ground FROM µ COM FROM µ COM P CTL H LINE FILTER BLOCK C101 L102 C102 RECTIFIER SMOOTHING D105 C115 36V S W BLOCK Q154 R157 R158 R155 5VT SW BLOCK Q152 R153 R154 D156 5V S W BLOCK PWR CTL BLOCK Q163 Q151 R151 R152 Q162 R161 FEED BA...

Page 70: ...C BUS INTERFACE TIMING VPS BLOCK IC7V1 SDA5650 141 5 2VA 358 VPS V out 59 CLK 60 DATA 55 DAV VSUP CVBS Iref VC01 VCS CSO SDA SCL GND PD1 EHB DA VIN T1 PD2 VC02 2 3 7 13 12 3 23 3 24 2 Tu IF NICAM A2 Block Diagram From Power 144 27 731 60 59 93 94 146 143 396 144 875 141 5 4VA 5 2VT S V W ...

Page 71: ... 75 70 69 68 67 65 59 58 54 52 50 V IN2 S1 V IN1 TUNER 48 46 43 33 32 31 CLK IN 29 28 4 43MHz 27 21 95 94 89 88 Killer C LPF ACC BPF Main Conv Main Conv DETAIL ENH NL EMPHA W D CLIP IC301 LA71750M UP REC SP REC To Drum To Drum W D CLIP REC FM EQ Y LPF FBC AGC SW Y DELAY KILL DEC REC APC VX02 VX02 COMP AMP 1H 2H DELAY YNR 29 16 2 12 IC201 LA70100M 5 Hi Fi Block Diagram 1 2 3 4 5 6 7 8 9 10 13 16 17...

Page 72: ...3 27 3 28 6 System Block Diagram RC501 R5R7 R5R7 R5R8 C5R C5R2 RC501 2fsc R524 R514 R518 R516 R589 C577 C576 L501 Q504 LD LD L M CONTROL R525 R526 IC501 HD6432197A ...

Page 73: ...ock BD101 R101 are defective Power dead F101 is defective Power dead IC101 is defective Switching dead D102 is defective No power D106 is defective No 5 3VA and 5VG 5VT No 14VA 12VA are 12VT D109 C120 are defective Q152 is defective No 5 2VT IC102 IC103 are defective Power dead NOTE 1 Shaded parts are critical for safety Replace only with specified part number 2 Voltages are DC measured with a dig...

Page 74: ...3 31 3 32 2 Tuner NICAM Circuit Diagram EE MODE VIDEO TU MODE AUDIO FROM POWER F A V F A V To A V F To Hi Fi To Hi Fi F SYS ...

Page 75: ...pear IC301 Pin 10 is defective EE PB Screen doesn t appear Q305 is defective REC is failded D301 or IC301 Pin30 is defective PB COLOR Signal disappear IC301 Pin70 is defective PB COLOR Signal disappear IC301 is defective D301or IC301 Pin 80 REC is defective PB and Recording is failed IC301 doesn t operate IC301 Pin 69 68 are defective Normal Audio signal is not recorded FL301 Q301 Q306 are defecti...

Page 76: ...ate RC501 is defective Remote control s Pulse will not received X501 is defective CLOCK SETTING will not operate X502 is defective µ COM will not operate ES501 ES502 LD501 are defective Auto Rew will not working RS501 RS502 Q514 Q515 are defective Auto stop occures R575 R576 R577 R578 are defective Deck will not operate IC504 is defective Reset is defective Set dead 3 35 3 36 ...

Page 77: ...ode 1 1Vp p IC301 Pin 6 REC mode 2 0Vp p IC301 Pin 29 PB mode 2 02Vp p IC301 Pin 41 PB mode 400mVp p IC301 Pin 64 PB mode 400mVp p IC301 Pin 23 PB REC mode 5Vp p IC301 Pin 24 PB REC mode 5Vp p IC301 Pins 71 72 REC mode 340mVp p IC301 Pins 51 54 PB mode 300mVp p IC301 Pin 63 PB mode 400mVp p IC301 Pin 11 PB mode 3 6Vp p _ IC301 Oscilloscope Waveform ...

Page 78: ...SYNC IC501 PIN 109 1V 100uS QUE REV MODE CTL IC501 Pin 3 1V 10mS CTL IC501 Pin4 1V 10mS DFG FG IC501 PIN 103 104 1V 10mS REC PB MODE CFG IC501 Pin9 1V 10mS V IN IC501 Pin 17 500mV 20uS V OUT IC501 Pin 19 500mV 20uS EE PB MODE C SYNC IC501 Pin 111 1 0V 100uS EE PB MODE 3 38 ...

Page 79: ... OUT V IN PB Hi Fi NORMAL Audio F To A V F To SYS F To A V F PWR F To PWR F To A V To STS or SYSTEM F POWER F SYS F SYS F SYS F PWR F To A V F SYS F SYS F SYS F To SYS F To Tuner F To A V All Audio is not appear IC801 42 43 Pins are defective ...

Page 80: ... 0 2 47 2 46 0 0 51 2 81 5 27 2 46 5 27 5 22 0 0 17 0 12 0 18 0 31 5 27 5 28 4 93 4 88 2 29 0 0 0 4 88 5 24 0 0 0 0 0 01 5 25 4 48 5 28 0 5 25 0 2 57 2 57 2 57 2 57 2 57 2 59 2 55 2 31 5 16 1 91 1 9 2 5 0 4 0 1 1 91 2 34 5 14 2 37 0 2 47 2 46 0 2 47 2 88 2 28 2 5 5 28 5 27 5 01 0 18 0 3 5 28 5 29 4 94 4 88 2 29 0 0 0 4 88 5 25 0 0 0 0 5 28 0 0 04 5 29 0 5 26 0 2 57 3 04 2 1 2 57 2 57 2 58 2 55 2 3...

Page 81: ... 03 0 02 0 03 0 03 13 95 5 3 0 5 14 18 22 18 22 2 5 1 9 2 64 2 6 3 01 0 0 5 3 0 05 1 92 0 0 0 0 0 12 72 0 5 3 4 52 32 34 13 4 0 84 29 78 0 0 69 5 18 4 38 0 01 5 3 0 01 5 18 0 42 0 4 1 29 5 19 1 98 1 98 2 41 0 67 0 71 4 61 0 14 0 5 09 0 0 12 5 26 0 0 01 0 4 54 4 52 32 89 13 35 0 84 29 8 0 0 69 5 18 4 38 0 01 4 41 0 4 52 0 69 0 71 1 83 5 16 1 98 1 96 2 37 0 67 0 22 4 61 0 63 0 0 07 5 25 0 0 01 0 4 5...

Page 82: ...3 45 3 46 LOCATION GUIDE PRINTED CIRCUIT BOARD DIAGRAMS 1 MAIN P C Board Solder Side ...

Page 83: ...Y ASSEMBLY M1 The instruction manual to be provided with this product will differ according to the destination OPTIONAL PARTS CABLE SET ASS Y Optional parts 810 BATTERY 808 806 PLUG ASS Y 2WAY Optional parts 812 PLUG ASS Y 1WAY Optional parts 811 REMOCON 900 PACKING RF 803 PACKING LF 803 BOX CARTON 802 BAG SOFR SHEET 804 INSTRUCTION MANUAL 801 SCART CABLE 821 5 1 EXPLODED VIEW ...

Page 84: ...et specifications may cause trouble in regard to safety and per formance We recommend that genuine JVC parts be used 452 330 260 300 250 462 462 A43 283 280 284 277 A42 A49 281 OPTIONAL PARTS A46 323 TU701 TUNER 2SCART 1SCART 452 320 452 452 275 LED502 LED501 A00 457 464 ...

Page 85: ...1 402 001 008 011 031 079 017 032 024 406 020 021 028 019 018 029 030 026 A03 A04 A01 002 002A 025 027 022 003 004 006 007 010 405 014 015 009 409 013 023 016 405 012 402 117 103 105 117 100 106 107 A21 114 113 112 110 115 A24 116 102 A23 A22 109 054 054A BOTTOM VIEW TOP VIEW 5 1 3 MECHANISM ASSEMBLY M4 ...

Page 86: ...N MECHANISM ASSEMBLY M4 A01LG 6723R 0401A DRUM CIRC ASSEMBLY D35 2CHSPONLY 8P2 AB G JKL A01 LG 6723R 0401B DRUM CIRC ASSEMBLY D35 2CHSP EP 8M2 I A01 LG 6723R 0403C DRUM CIRC ASSEMBLY D35 6CHPAL 8P6C CDEF H MN A04 LG 4421R 0008A BRAKEASSEMBLY RS AB G JKL A04 LG 4811RF0038A BRACKETASSEMBLY L D S ABCDEFGHI JKLMN A11 LG 4471R 0005A GEARASSY P3 ABCDEFGHI JKLMN A12 LG 4471R 0004A GEARASSY P2 ABCDEFGHI J...

Page 87: ...WING PCX2275V0 1UF M PILKO ABCDEFGHI J C102 LG 624 088L CAPACITOR DRAWING 435DSUNILELECTRONICS0 1UF 2 KLMN C103 LG 0CE476CU611 CAPACITOR AL ELECTROLYTIC 47UFSHL SD400VMFLBK7 5 ABCDEFGHI JKLMN C105 LG 0CQ1031Y519 CAPACITOR POLYESTER 0 01UFD630VKPENITP ABCDEFGHI JKLMN C106 LG 624 087B CAPACITOR HIGH VOL100P 1KVSMPSSAMHWA ABCDEFGHI JKLMN C109 QET41HM 106 CAPACITOR FIXEDELECTROLYTIC 10M SRA50V MFM5 TP...

Page 88: ... ABCDEFGHI JKLMN C5A4 LG 0CN1030F678 CAPACITORTUBULA HIGHDIELE 0 01M 16V M Y TA26 ABCDEFGHI JKLMN C5A5 QET41HM 105 CAPACITOR ELECTROLYTIC 1 0MSRA SS50V MFM5TP 5 ABCDEFGHI JKLMN C5G2 LG 0CE1086C638 CAPACITOR FIXEDELECTROLYTIC 1000000000PFSMS SG6 3VMFM ABCDEFGHI JKLMN C5G3 LG 0CN1030F678 CAPACITORTUBULA HIGHDIELE 0 01M 16V M Y TA26 ABCDEFGHI JKLMN C5K1 LG 0CN1040K948 CAPACITOR FIXEDTUBULAR Highd 0 1...

Page 89: ...ILM 100KOHM1 6W5 00 TA26 ABCDEFGHI JKLMN R337 QRD161J 222Y RESISTOR FIXEDCARBONFILM 2 2KOHM1 6W5 00 TA26 ABCDEFGHI JKLMN R338 QRD161J 271Y RESISTOR FIXEDCARBONFILM 270OHM1 6W5 00 TA26 ABCDEFGHI JKLMN R339 QRD161J 561Y RESISTOR FIXEDCARBONFILM 560OHM1 6W5 00 TA26 ABCDEFGHI JKLMN R340 QRD161J 183Y RESISTOR FIXEDCARBONFILM 18KOHM1 6W5 00 TA26 ABCDEFGHI JKLMN R341 QRD161J 562Y RESISTOR FIXEDCARBONFILM...

Page 90: ... TA26 B G J R963 QRD161J 101Y RESISTOR FIXEDCARBONFILM 100OHM1 6W5 00 TA26 B G J R964 QRD161J 821Y RESISTOR FIXEDCARBONFILM 820OHM1 6W5 00 TA26 ABCDEFGHI JKLMN R965 QRD161J 102Y RESISTOR FIXEDCARBONFILM 1KOHM1 6W5 00 TA26 ABCDEFGHI JKLMN R9C1 QRD161J 123Y RESISTOR FIXEDCARBONFILM 12KOHM1 6W5 00 TA26 B DEFG J R9C2 QRD161J 103Y RESISTOR FIXEDCARBONFILM 10KOHM1 6W5 00 TA26 B DEFG J R9M3 QRD161J 473Y ...

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