JVC HR-J3009UM, Service Manual

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TABLE OF CONTENTS
Section Title Page Section Title Page
Important Safety Precautions
INSTRUCTIONS
DISASSEMBLY INSTRUCTION
1.REMOVAL OF MECHANICAL PARTS AND
P.C.BOARDS .................................................................. 1-1
1-1
TOP CABINET AND FRONT CABINET .................. 1-1
1-2 FLAP ....................................................................... 1-1
1-3 DECK CHASSIS ..................................................... 1-1
1-4 SYSCON PCB ......................................................... 1-1
2.REMOVAL OF DECK PARTS ......................................... 1-2
2-1
TOP BRACKET ....................................................... 1-2
2-2 CASSETTE HOLDER ASS’Y .................................. 1-2
2-3 CASSETTE SIDE L/R ............................................. 1-2
2-4 LINK UNIT ............................................................... 1-2
2-5 LINK LEVER/FLAP LEVER ..................................... 1-2
2-6 LOADING MOTOR/WORM ..................................... 1-3
2-7 TENSION ASS’Y ..................................................... 1-3
2-8 T BRAKE ARM/T BRAKE BAND ............................. 1-4
2-9 S REEL/T REEL/IDLER ARM ASS’Y/IDLER GEAR ........ 1-4
2-10 CASSETTE OPENER/PINCH ROLLER
BLOCK/P5 ARM ASS’Y ........................................... 1-5
2-11 A/C HEAD ............................................................... 1-5
2-12 FE HEAD(RECORDER ONLY) ............................... 1-5
2-13 AHC ASS’Y/CYLINDER UNIT ASS’Y ...................... 1-5
2-14 CAPSTAN DD UNIT ................................................ 1-6
2-15 MAIN CAM/PINCH ROLLER CAM/JOINT GEAR ............ 1-6
2-16 LOADING GEAR S/T UNIT .............................................. 1-6
2-17 CLUTCH ASS’Y/RING SPRING/
CLUTCH LEVER/CLUTCH GEAR ................................... 1-7
2-18 CASSETTE GUIDE POST/
INCLINED BASE S/T UNIT/P4 CAP ................................ 1-7
3.REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ........ 1-8
REMOVAL ........................................................................ 1-8
INSTALLATION ................................................................ 1-9
KEY TO ABBREVIATIONS ............................................. 1-10
PREVENTIVE CHECKS AND SERVICE INTERVALS .... 1-12
CLEANING ...................................................................... 1-12
SERVICE MODE LIST ..................................................... 1-13
SERVICING FIXTURES AND TOOLS ............................. 1-13
MECHANISM ADJUSTMENT PARTS LOCATION GUIDE ....... 1-13
MECHANICAL ADJUSTMENTS
TAPE REMOVAL METHOD AT NO POWER SUPPLY .... 1-14
1.CONFIRMATION AND ADJUSTMENT ......................... 1-14
1-1
CONFIRMATION AND ADJUSTMENT OF
TENSION POST POSITION ................................. 1-14
1-2 CONFIRMATION OF PLAYBACK TORQUE AND
BACK TENSION TORQUE DURING PLAY BACK .. 1-14
1-3 CONFIRMATION OF VSR TORQUE .................... 1-14
1-4 CONFIRMATION OF REEL BRAKE TORQUE ..... 1-15
2.CONFIRMATION AND ADJUSTMENT OF
TAPE RUNNING MECHANISM .................................... 1-15
2-1
GUIDE ROLLER ................................................... 1-15
2-2 CONFIRMATION AND ADJUSTMENT OF
AUDIO/CONTROL HEAD ..................................... 1-16
2-3 TAPE RUNNING ADJUSTMENT(X-VALUE ADJUSTMENT) ... 1-16
ELECTRICAL ADJUSTMENTS
1.BASIC ADJUSTMENT .................................................. 1-17
1-1
SWITCHING POINT .............................................. 1-17
ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE ........ 1-17
IC DESCRIPTIONS ......................................................... 1-18
SERVO TIMING CHART ................................................. 1-21
MECHANISM TIMING CHART ........................................ 1-22
TROUBLESHOOTING GUIDE
POWER DOES NOT TURN ON .............................................. 1-23
POWER SHUTS OFF .................................................... 1-24
CYLINDER NOT ROTATING DURING PLAYBACK AND RECODRDING .. 1-26
CASSETTE IN AND DOWN, UNIT HAS NO FUNCTIONS ..... 1-26
FF/REW DO NOT WORK .............................................. 1-27
AUDIO SHAKES ............................................................ 1-27
CASSETTE TAPE IS NOT ACCEPTED ......................... 1-28
WHEN INSERTING CASSETTE, IT EJECTS IMMEDIATELY .. 1-30
TAPE LOADING IS OK, BUT UNLOADS IMMEDIATELY .. 1-32
CAPSTAN DD MOTOR NOT ROTATING ...................... 1-33
PLAYBACK PICTURE JITTERS HORIZONTALLY ........ 1-34
PLAYBACK PICTURE SHAKES .................................... 1-34
AUTO TRACKING DOES NOT OPERATE .................... 1-35
WHEN PLAYBACK, FAST FORWARD OR REWIND MODE IS ACTIVATED,
UNIT STOPS IMMEDIATELY ..................................................... 1-35
PLAYBACK PICTURE JITTERS VERTICALLY ............. 1-36
NO PLAYBACK PICTURE ............................................. 1-37
NO PICTURE DURING PLAYBACK .............................. 1-38
NO COLOR DURING SELF RECORDING AND PLAYBACK . 1-38
PLAYBACK PICTURE NOISY(EVEN AFTER CLEANING HEADS) ... 1-39
NO NORMAL AUDIO ON PLAYBACK ........................... 1-40
AUDIO CAN NOT BE RECORDED ............................... 1-41
RECORDING MECHANISM WORKS,
BUT NO VIDEO RECORDED FROM INPUT JACK OR TUNER .. 1-42
NO E-E(NO VIDEO FROM TUNER) .............................. 1-43
NO E-E AUDIO(MONO) ................................................. 1-44
NO TUNER AUDIO(MONO) ........................................... 1-45
CHARTS AND DIAGRAMS
INTERCONNECTION DIAGRAM [HR-J3009UM] .............. 2-1
Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM [HR-J3009UM] ... 2-3
SYSTEM CONTROL/SERVO SCHEMATIC DIAGRAM [HR-J3009UM] ... 2-5
POWER SCHEMATIC DIAGRAM [HR-J3009UM] ............. 2-7
TUNER SCHEMATIC DIAGRAM [HR-J3009UM] ................ 2-9
OPERATION SCHEMATIC DIAGRAM [HR-J3009UM] ......... 2-11
SYSCON CIRCUIT BOARD(INSERTED PARTS) [HR-J3009UM] .. 2-13
SYSCON CIRCUIT BOARD(CHIP MOUNTED PARTS) [HR-J3009UM] ... 2-15
WAVEFORMS [HR-J3009UM] ......................................... 2-18
Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM [HR-J3009UM] ... 2-19
SYSTEM CONTROL/SERVO BLOCK DIAGRAM [HR-J3009UM] ... 2-21
TUNER BLOCK DIAGRAM [HR-J3009UM] ..................... 2-23
OPERATION BLOCK DIAGRAM [HR-J3009UM] ............ 2-25
INTERCONNECTION DIAGRAM [HR-J4009UM] ............ 2-27
Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM [HR-J4009UM] 2-29
SYSTEM CONTROL/SERVO SCHEMATIC DIAGRAM [HR-J4009UM] 2-31
POWER SCHEMATIC DIAGRAM [HR-J4009UM] ........... 2-33
TUNER SCHEMATIC DIAGRAM [HR-J4009UM] .............. 2-35
OPERATION SCHEMATIC DIAGRAM [HR-J4009UM] ......... 2-37
SYSCON CIRCUIT BOARD(INSERTED PARTS) [HR-J4009UM] .. 2-39
SYSCON CIRCUIT BOARD(CHIP MOUNTED PARTS) [HR-J4009UM] ... 2-41
WAVEFORMS [HR-J4009UM] ......................................... 2-44
Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM [HR-J4009UM] ... 2-45
SYSTEM CONTROL/SERVO BLOCK DIAGRAM [HR-J4009UM] ... 2-47
TUNER BLOCK DIAGRAM [HR-J4009UM] ..................... 2-49
OPERATION BLOCK DIAGRAM [HR-J4009UM] ............ 2-51
PARTS LIST
3.1
PACKING AND ACCESSORY ASSEMBLY <M1> ..... 3-1
3.2 FINAL ASSEMBLY <M2> [HR-J3009UM] ................. 3-2
3.3 FINAL ASSEMBLY <M2> [HR-J4009UM] ................. 3-3
3.4 MECHANISM ASSEMBLY <M4> ............................... 3-4
3.5 ELECTRICAL PARTS LIST [HR-J3009UM] ............... 3-7
SYSCON BOARD ASSEMBLY <03> [HR-J3009UM] ... 3-7
3.6 ELECTRICAL PARTS LIST [HR-J4009UM] ............. 3-10
SYSCON BOARD ASSEMBLY <03> [HR-J4009UM] .. 3-10
Reference .......................................................................... 4-1
GENERAL SPECIFICATIONS [HR-J3009UM] .................. 4-1
GENERAL SPECIFICATIONS [HR-J4009UM] .................. 4-7
HR-J3009UM HR-J4009UM
POWER VOLTAGE 120 V 60 Hz 110-220 V 50/60 Hz
TIMER BACK-UP (at Power off mode) 5 second 18 Hours
The following table lists the differing points between Models HR-J3009UM and HR-J4009UM.
MODEL
ITEM