Table Of Contents - JVC SR-VS30U Service Manual
Mini dv/s-vhs video cassette recorder
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Also See for SR-VS30U:
- Instructions manual (84 pages) ,
- Brochure & specs (4 pages) ,
- Service manual (43 pages)
Table of Contents
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Section
INSTRUCTIONS
1.1 HOW TO REMOVE THE MAJOR PARTS ........................................ 1-1
1.1.1 Introduction .................................................................................. 1-1
1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY .................. 1-1
1.3 DISCONNECTION OF CONNECTORS (WIRES) ............................ 1-1
1.4.1 Disassembly flow chart ................................................................ 1-2
1.5.1 Disassembly flow chart ................................................................ 1-4
1.6.1 Disassembly flow chart ................................................................ 1-6
1.7 CONNECTION .................................................................................. 1-8
1.8 SERVICE POSITIONS .................................................................... 1-10
1.8.1 Requirement PATCH CORDS .................................................... 1-10
1.9 Jig RCU mode ................................................................................. 1-11
1.9.1 Setting the Jig RCU mode ......................................................... 1-11
1.9.2 Setting the User RCU mode ...................................................... 1-11
1.10 MECHANISM SERVICE MODE ................................................... 1-12
1.11 EMERGENCY DISPLAY FUNCTION ............................................ 1-13
1.11.1 Displaying the emergency information ..................................... 1-13
1.11.2 Clearing the emergency history ............................................... 1-13
1.11.3 Emergency content description ................................................ 1-14
1.11.4 Emergency detail information <1> ........................................... 1-15
1.11.5 Emergency detail information <2> ........................................... 1-16
2.1 BEFORE STARTING REPAIR AND ADJUSTMENT ......................... 2-1
2.1.1 Precautions .................................................................................. 2-1
2.1.2 Checking for Proper Mechanical Operations ............................... 2-1
2.1.3 Manually Removing the Cassette Tape ....................................... 2-1
2.1.4 Jigs and Tools Required for Adjustment ....................................... 2-2
2.1.5 Maintenance and Inspection ........................................................ 2-3
2.2 REPLACEMENT OF MAJOR PARTS ............................................... 2-6
(Phase matching between mechanical parts) ............................... 2-6
2.2.2 How to Set the Mechanism Assembling Mode ............................. 2-6
2.2.3 Cassette Holder Assembly ........................................................... 2-6
2.2.4 Pinch Roller Arm Assembly .......................................................... 2-8
2.2.5 Guide Arm Assembly and Press Lever Assembly ........................ 2-8
2.2.6 Audio Control Head ...................................................................... 2-8
2.2.7 Loading Motor .............................................................................. 2-8
2.2.8 Capstan Motor ............................................................................. 2-9
2.2.9 Pole Base Assembly (supply or take-up side) .............................. 2-9
2.2.10 Rotary Encoder ........................................................................ 2-10
2.2.11 Clutch Unit ................................................................................ 2-10
and Coupling Gear .................................................................... 2-10
2.2.13 Link Lever ................................................................................ 2-11
2.2.14 Cassette Gear, Control Cam and Worm Gear ......................... 2-11
2.2.15 Control Plate ............................................................................ 2-11
and Loading Arm Gear Shaft .................................................... 2-12
2.2.17 Take-up Lever, Take-up Head and Control Plate Guide .................. 2-13
2.2.18 Capstan Brake Assembly ......................................................... 2-13
2.2.19 Sub Brake Assembly (take-up side) ......................................... 2-13
and Main Brake Assembly (supply side) ................................... 2-13
and Tension Arm Assembly ....................................................... 2-14
2.2.22 Idler Lever, Idler Arm Assembly ............................................... 2-14
2.2.23 Stator Assembly ....................................................................... 2-14
2.2.24 Rotor Assembly ........................................................................ 2-14
2.2.25 Upper Drum Assembly ............................................................. 2-15
2.3 COMPATIBILITY ADJUSTMENT .................................................. 2-16
2.3.1 Checking/Adjustment of FM Waveform Linearity ....................... 2-16
2.3.2 Checking/Adjustment of the Height and Tilt of the Audio Control Head .................... 2-17
2.3.3 Checking/Adjustment of the Audio Control Head Phase (X-Value) ............... 2-17
2.3.4 Checking/Adjustment of the Standard Tracking Preset ............. 2-18
2.3.5 Checking/Adjustment of the Tension Pole Position .................... 2-18
2.4 PREPARATION ............................................................................... 2-20
2.4.1 Precautions ................................................................................ 2-20
2.4.2 Tools Required for Adjustments ................................................. 2-20
2.4.3 Disassembly and Assembly Procedures .................................... 2-20
2.5 DISASSEMBLY/ASSEMBLY OF THE MECHANISM ASSEMBLY ................... 2-21
2.5.1 Introduction ................................................................................ 2-21
2.5.2 Mechanism Modes ..................................................................... 2-21
2.6 MECHANISM TIMING CHART ....................................................... 2-23
2.7 MECHANISM ASSEMBLY/DISASSEMBLY PROCEDURE TABLE .................. 2-24
2.8 DISASSEMBLY/ASSEMBLY ........................................................... 2-26
2.9 LIST OF PROCEDURES FOR DISASSEMBLY ............................. 2-34
2.10 MECHANISM PHASE CHECK/ADJUSTMENT ............................ 2-35
2.11 MECHANISM DISASSEMBLY/ASSEMBLY SHEET ..................... 2-36
2.12 POSITIONING THE TENSION POLE ........................................... 2-38
2.13 COMPATIBILITY AND ERROR RATE ADJUSTMENTS ................. 2-39
2.13.1 Preparation .............................................................................. 2-39
2.13.2 Adjustment ............................................................................... 2-39
2.13.3 Linearity adjustment ................................................................. 2-40
2.13.4 PB switching point adjustment ................................................. 2-40
2.13.5 Error rate adjustment ............................................................... 2-40
2.13.6 Error rate measuring method ................................................... 2-40
2.14 TAPE EJECTION .......................................................................... 2-41
TABLE OF CONTENTS
Title
Page
Section
3.1 PRECAUTION .................................................................................. 3-1
3.1.1 Required test equipments ............................................................ 3-1
3.1.2 Required adjustment tools ........................................................... 3-1
3.1.3 Color (colour) bar signal,Color (colour) bar pattern ..................... 3-1
3.1.4 Switch settings and standard precautions ................................... 3-1
3.1.5 EVR Adjustment ........................................................................... 3-1
3.2 SERVO CIRCUIT .............................................................................. 3-2
3.2.1 Switching point ............................................................................. 3-2
3.2.2 Slow tracking preset ..................................................................... 3-2
3.3 VIDEO CIRCUIT ............................................................................... 3-2
3.3.1 D/A level ....................................................................................... 3-2
3.3.2 EE Y/PB Y (S-VHS/VHS) level ..................................................... 3-2
3.3.3 REC color (colour) level ............................................................... 3-3
3.3.5 Video EQ (Frequency response) ................................................. 3-3
3.3.6 AUTO PICTURE initial setting ...................................................... 3-4
3.3.6 DV EE Y level ............................................................................... 3-4
3.4 AUDIO CIRCUIT ............................................................................... 3-4
3.4.1 Audio REC FM ............................................................................. 3-4
3.5 DEMODULATOR CIRCUIT ............................................................... 3-5
3.5.1 Input level ..................................................................................... 3-5
3.5.2 Stereo VCO .................................................................................. 3-5
3.5.3 Stereo filter ................................................................................... 3-5
3.5.4 Separation-1 ................................................................................ 3-5
3.5.5 Separation-2 ................................................................................ 3-6
3.5.6 SAP VCO ..................................................................................... 3-6
3.6 PREPARATION ................................................................................. 3-7
3.6.1 Precautions .................................................................................. 3-7
3.6.2 Equipment required for adjustment .............................................. 3-7
3.6.3 Tools required for adjustments ..................................................... 3-7
3.6.4 Setup ............................................................................................ 3-7
NOTES OF SCHEMATIC DIAGRAM ..................................................... 4-1
CIRCUIT BOARD NOTES ...................................................................... 4-2
4.1 BOARD INTERCONNECTIONS ....................................................... 4-3
4.3 MAIN (VIDEO/AUDIO) SCHEMATIC DIAGRAM .............................. 4-7
4.4 MAIN (VHS SYSCON) SCHEMATIC DIAGRAM .............................. 4-9
4.5 MAIN (TUNER) SCHEMATIC DIAGRAM ....................................... 4-11
4.6 MAIN (VIDEO I/O & SUB EMPHA) SCHEMATIC DIAGRAM ......... 4-13
4.7 MAIN (AUDIO I/O) SCHEMATIC DIAGRAM ................................... 4-15
4.8 MAIN (CONNECTION) SCHEMATIC DIAGRAM ............................ 4-17
4.9 3D DIGITAL/2M SCHEMATIC DIAGRAM ....................................... 4-19
4.10 TERMINAL (S-SUB) SCHEMATIC DIAGRAM .............................. 4-21
4.11 TERMINAL (I/O) SCHEMATIC DIAGRAM .................................... 4-23
4.14 DV MSD SCHEMATIC DIAGRAM ................................................ 4-29
4.15 DV MAIN SCHEMATIC DIAGRAM ............................................... 4-31
4.16 DV I/O SCHEMATIC DIAGRAM ................................................... 4-33
4.17 DV V OUT SCHEMATIC DIAGRAM ............................................. 4-35
4.18 DV PRE/REC SCHEMATIC DIAGRAM ........................................ 4-37
4.19 DV REG SCHEMATIC DIAGRAM ................................................ 4-38
4.20 DV AUDIO AD/DA SCHEMATIC DIAGRAM ................................. 4-39
4.21 MAIN(ON SCREEN) SCHEMATIC DIAGRAM ............................. 4-40
4.22 SWITCHING REGULATOR CIRCUIT BOARD ............................. 4-41
4.23 MAIN CIRCUIT BOARD ................................................................ 4-43
4.24 3D DIGITAL/2M CIRCUIT BOARD ............................................... 4-46
4.26 TERMINAL CIRCUIT BOARD ....................................................... 4-49
4.27 DV MAIN CIRCUIT BOARD .......................................................... 4-51
4.28 REMOTE CONTROL SCHEMATIC DIAGRAM ............................ 4-53
4.29 WAVEFORMS ............................................................................... 4-54
4.30 VOLTAGE CHARTS ...................................................................... 4-55
4.31 FDP GRID ASSIGNMENT AND ANODE CONNECTION ............. 4-57
4.32 CPU PIN FUNCTION .................................................................... 4-58
4.33 SYSTEM CONTROL BLOCK DIAGRAM (VHS) ........................... 4-59
4.34 VIDEO BLOCK DIAGRAM(VHS) .................................................. 4-61
4.35 AUDIO BLOCK DIAGRAM (VHS) ................................................. 4-65
4.36 SYSTEM CONTROL BLOCK DIAGRAM (DV) ............................. 4-67
4.37 VIDEO BLOCK DIAGRAM (DV) ................................................... 4-69
5.5 ELECTRICAL PARTS LIST ............................................................... 5-8
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