JVC HR-DVS3EK - Page 70

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VICTOR COMPANY OF JAPAN, LIMITED

VIDEO DIVISION

Printed in Japan

S40894

Main Page

Table of Contents3
Important Safety Precautions4
Disassembly7
How to Remove the Major Parts7
Introduction7
How to Read the Disassembly and Assembly7
Disconnection of Connectors (Wires)7
HOW to REMOVE the MAJOR PARTS <COM Section8
Disassembly Flow Chart8
Disassembly/Assembly Method <COM Section8
HOW to REMOVE the MAJOR PARTS <VHS Section10
Disassembly Flow Chart10
Disassembly/Assembly Method <VHS Section10
HOW to REMOVE the MAJOR PARTS <DV Section12
Disassembly Flow Chart12
Disassembly/Assembly Method <DV Section12
Connection14
Service Positions16
Requirement PATCH CORDS16
Service Position <VHS SIDE16
Service Position <DV FOIL SIDE16
Service Position <DV COMPONENT SIDE17
Jig RCU Mode17
Setting the Jig RCU Mode17
Mechanism Service Mode18
How to Set the "MECHANISM SERVICE MODE18
Emergency Display Function19
Mechanism Adjustment (Vhs)23
Before Starting Repair and Adjustment23
Precautions23
Checking for Proper Mechanical Operations23
Manually Removing the Cassette Tape23
Jigs and Tools Required for Adjustment24
Maintenance and Inspection25
Replacement of Major Parts28
Before Starting Disassembling (Phase Matching between Mechanical Parts)28
How to Set the Mechanism Assembling Mode28
Cassette Holder Assembly28
Pinch Roller Arm Assembly30
Guide Arm Assembly and Press Lever Assembly30
Loading Motor30
Capstan Motor31
Pole Base Assembly (Supply or Take-Up Side)31
Rotary Encoder32
Clutch Unit32
Change Lever Assembly, Direct Gear, Clutch Gear and Coupling Gear32
Link Lever33
Cassette Gear, Control Cam and Worm Gear33
Control Plate33
Loading Arm Gear (Supply or Take-Up Side) and Loading Arm Gear Shaft34
Take-Up Lever, Take-Up Head and Control Plate Guide35
Capstan Brake Assembly35
Sub Brake Assembly (Take-Up Side)35
Main Brake Assembly (Take-Up Side), Reel Disk (Take-Up Side) and Main Brake Assembly (Supply Side)35
Tension Brake Assembly, Reel Disk (Supply Side) and Tension Arm Assembly36
Idler Lever, Idler Arm Assembly36
Stator Assembly36
Rotor Assembly36
Upper Drum Assembly37
Compatibility Adjustment38
Mechanism Adjustment (DV)42
Preparation42
Precautions42
Tools Required for Adjustments42
Disassembly and Assembly Procedures42
Screws and Washers Used in Disassembly/Assembly of the Mechanism Assembly42
Disassembly/Assembly of the Mechanism Assembly43
Introduction43
Mechanism Modes43
Mechanism Timing Chart45
Mechanism Assembly/Disassembly Procedure Table46
Disassembly/Assembly48
List of Procedures for Disassembly56
Mechanism Phase Check/Adjustment57
Mechanism Disassembly/Assembly Sheet58
Positioning the Tension Pole60
Compatibility and Error Rate Adjustments61
Preparation61
Adjustment61
Linearity Adjustment62
PB Switching Point Adjustment62
Error Rate Adjustment62
Error Rate Measuring Method62
Electrical Adjustment (Vhs)64
Precaution64
Required Test Equipments64
Required Adjustment Tools64
Color (Colour) Bar Signal,Color (Colour) Bar Pattern64
Switch Settings and Standard Precautions64
EVR Adjustment64
Servo Circuit65
Switching Point65
Video Circuit65
Slow Tracking Preset65
D/A Level65
EE Y/PB y (S-VHS/VHS) Level65
REC Color (Colour) Level66
Video EQ (Frequency Response)66
AUTO PICTURE Initial Setting67
DV EE y Level67
Audio Circuit67
Audio REC FM67
Syscon Circuit67
Timer Clock67
Electrical Adjustment (DV)68
Preparation68
Precautions68
Equipment Required for Adjustment68
Tools Required for Adjustments68
Setup68
Charts and Diagrams71
Notes of Schematic Diagram71
Circuit Board Notes72
Board Interconnections73
Switching Regulator Schematic Diagram74
Main (Video/Audio) Schematic Diagram75
Main (Vhs Syscon) Schematic Diagram76
Main (Tuner) Schematic Diagram77
Main (Video I/O&Sub Empha) Schematic Diagram78
Main (Audio I/O) Schematic Diagram79
Main (Connection) Schematic Diagram80
Digital/2M Schematic Diagram81
Terminal (S-Sub) Schematic Diagram82
Terminal (I/O) Schematic Diagram83
Demodulator Schematic Diagram84
Power Sw, Sw/Display and Jog Schematic Diagrams85
DV Msd Schematic Diagram86
DV Main Schematic Diagram87
DV I/O Schematic Diagram88
DV V out Schematic Diagram89
DV Pre/Rec Schematic Diagram90
DV Reg Schematic Diagram91
DV Audio Ad/Da Schematic Diagram91
Main(On Screen) Schematic Diagram92
Remote Control Schematic Diagram92
Switching Regulator Circuit Board93
Main Circuit Board94
Demodulator Power Sw, Sw/Display and Jog Circuit Boards96
Terminal Circuit Board97
DV Main Circuit Board99
Waveforms100
Voltage Charts101
Fdp Grid Assignment and Anode Connection102
Cpu Pin Function102
System Control Block Diagram (Vhs)103
Video Block Diagram(Vhs)104
Audio Block Diagram (Vhs)106
System Control Block Diagram (DV)107
Video Block Diagram (DV)108
Parts List109
Packing and Accessory Assembly <M1109
Final Assembly <M2110
Mechanism Assembly (Vhs) <M3112
Mechanism Assembly (DV) <M4114
Electrical Parts List116
Sw Regulator Board Assembly <01116
Main Board Assembly <03117
Digital/2M Board Assembly <05125
Terminal Board Assembly <06127
Demod Board Assembly <14128
Power Sw Board Assembly <27129
Sw/Display Board Assembly <28129
DV Main Board Assembly <50130
Loading Motor Board Assembly <55135
Jog Board Assembly <85135

JVC HR-DVS3EK - Page 70

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