Table Of Contents - JVC HR-J6009UM Service Manual

Section
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 .. 1-25
CASSETTE IN AND DOWN, UNIT HAS NO FUNCTIONS ..... 1-25
FF/REW DO NOT WORK .............................................. 1-26
AUDIO SHAKES ............................................................ 1-26
CASSETTE TAPE IS NOT ACCEPTED ......................... 1-27
WHEN INSERTING CASSETTE, IT EJECTS IMMEDIATELY .. 1-28
TAPE LOADING IS OK, BUT UNLOADS IMMEDIATELY .. 1-29
CAPSTAN DD MOTOR NOT ROTATING ...................... 1-30
PLAYBACK PICTURE JITTERS HORIZONTALLY ........ 1-31

TABLE OF CONTENTS

Title Page Section
PLAYBACK PICTURE SHAKES .................................... 1-31
AUTO TRACKING DOES NOT OPERATE .................... 1-32
WHEN PLAYBACK, FAST FORWARD OR REWIND MODE IS ACTIVATED,
UNIT STOPS IMMEDIATELY ..................................................... 1-32
PLAYBACK PICTURE JITTERS VERTICALLY ............. 1-33
NO PLAYBACK PICTURE ............................................. 1-34
NO PICTURE DURING PLAYBACK .............................. 1-35
NO COLOR DURING SELF RECORDING AND PLAYBACK . 1-35
PLAYBACK PICTURE NOISY(EVEN AFTER CLEANING HEADS) ... 1-36
NO NORMAL AUDIO ON PLAYBACK ........................... 1-37
AUDIO CAN NOT BE RECORDED ............................... 1-38
RECORDING MECHANISM WORKS,
BUT NO VIDEO RECORDED FROM INPUT JACK OR TUNER .. 1-39
NO E-E(NO VIDEO FROM TUNER) .............................. 1-40
NO E-E AUDIO(MONO) ................................................. 1-41
NO TUNER AUDIO(MONO) ........................................... 1-42
CHARTS AND DIAGRAMS
INTERCONNECTION DIAGRAM ...................................... 2-1
Y/C/AUDIO/CCD/HEAD AMP SCHEMATIC DIAGRAM ..... 2-3
SYSTEM CONTROL/SERVO SCHEMATIC DIAGRAM .... 2-5
POWER SCHEMATIC DIAGRAM ...................................... 2-7
TUNER SCHEMATIC DIAGRAM ....................................... 2-9
OPERATION SCHEMATIC DIAGRAM ............................ 2-11
HI-FI/DEMODULATOR SCHEMATIC DIAGRAM ............. 2-13
SYSCON CIRCUIT BOARD(INSERTED PARTS) ........... 2-15
SYSCON CIRCUIT BOARD(CHIP MOUNTED PARTS) .. 2-17
WAVEFORMS .................................................................. 2-20
Y/C/AUDIO/HEAD AMP BLOCK DIAGRAM .................... 2-21
SYSTEM CONTROL/SERVO BLOCK DIAGRAM ........... 2-23
TUNER BLOCK DIAGRAM .............................................. 2-25
OPERATION BLOCK DIAGRAM ..................................... 2-27
POWER BLOCK DIAGRAM ............................................ 2-27
HI-FI/DEMODULATOR BLOCK DIAGRAM ..................... 2-29
PARTS LIST
3.1 PACKING AND ACCESSORY ASSEMBLY <M1> ..... 3-1
3.2 FINAL ASSEMBLY <M2> ........................................... 3-2
3.3 MECHANISM ASSEMBLY <M4> ............................... 3-4
3.4 ELECTRICAL PARTS LIST ....................................... 3-7
SYSCON BOARD ASSEMBLY <03> ......................... 3-7
Reference .......................................................................... 4-1
GENERAL SPECIFICATIONS ........................................... 4-1
Title Page