Table Of Contents - JVC GR-DVM90U Service Manual

Section Title
Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
1.1 BEFORE ASSEMBLY AND DISASSEMBLY ................................. 1-1
1.1.1 Precautions .......................................................................... 1-1
1.1.2 Assembly and disassembly ................................................. 1-1
1.1.3 Destination of connectors .................................................... 1-1
1.1.4 Disconnection of Connectors (Wires) .................................. 1-1
1.2 JIGS AND TOOLS REQUIRED FOR DISASSEMBLY,
ASSEMBLY AND ADJUSTMENT ................................................. 1-2
1.2.1 Tools required for adjustments ............................................. 1-2
1.3 DISASSEMBLY/ASSEMBLY OF CABINET PARTS AND
BOARD ASSEMBLY ..................................................................... 1-3
1.3.1 Disassembly flow chart ........................................................ 1-3
1.3.2 Disassembly method (I) ....................................................... 1-4
1.4 DISASSEMBLY OF 4 MONITOR ASSEMBLY ............................ 1-8
1.4.1 4 Monitor assembly/Hinge assembly .................................. 1-8
1.4.2 Hinge assembly ................................................................... 1-8
1.5 DISASSEMBLY 0 E VF ASSEMBLY ........................................... 1-9
1.5.1 0 E. VF assembly ............................................................... 1-9
1.6 DISASSEMBLY OF 7 OP BLOCK ASSEMBLY/CCD
BOARD ASSEMBLY ................................................................... 1-10
1.6.1 Precautions ........................................................................ 1-10
1.6.2 How to remove OP block assembly and CCD board
assembly ............................................................................ 1-10
1.6.3 How to install OP block assembly and CCD board
assembly ............................................................................ 1-10
1.6.4 Replacement of service parts ............................................ 1-10
1.7 HOW TO TAKE OUT CASSETTE TAPE MANUALLY ................ 1-11
1.8 SERVICE NOTE ......................................................................... 1-12
1.9 EMERGENCY DISPLAY ............................................................. 1-13
2. MECHANISM ADJUSTMENT
2.1 PRELIMINARY REMARKS ON ADJUSTMENT AND REPAIR ..... 2-1
2.1.1 Precautions .......................................................................... 2-1
2.1.2 Notes on procedure for disassembly/assembly ................... 2-1
2.2 DISASSEMBLY/ASSEMBLY OF MECHANISM ASSEMBLY ........ 2-2
2.2.1 General statement ............................................................... 2-2
2.2.2 Explanation of mechanism mode ......................................... 2-2
2.2.3 Mechanism timing chart ....................................................... 2-3
2.2.4 Disassembly/assembly of mechanism assembly ................. 2-4
2.2.5 Disassembly/assembly ........................................................ 2-7
2.2.6 List of procedures for disassembly .................................... 2-13
2.2.7 Checkup and adjustment of mechanism phase ................. 2-14
2.2.8 Assembling slide deck assembly and main deck
assembly ............................................................................ 2-15
2.2.9 Locating tension pole ......................................................... 2-16
2.3 SERVICE NOTE ......................................................................... 2-17
2.4 JIG CONNECTOR CABLE CONNECTOR ................................. 2-19
3. ELECTRICAL ADJUSTMENT
3.1 PREPARATION ............................................................................ 3-1
3.2 SETUP .......................................................................................... 3-1
3.3 FUSE LOCATION ......................................................................... 3-2
3.3.1 MAIN PWB (FOIL SIDE) ...................................................... 3-2
3.3.2 MAIN PWB (COMPONENT SIDE) ...................................... 3-2
3.3.3 MONITOR PWB (COMPONENT SIDE) ............................... 3-3
4. CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM ............................................ 4-1
CIRCUIT BOARD NOTES ............................................................ 4-2
4.1 BOARD INTERCONNECTIONS ................................................... 4-3
4.2 CPU SCHEMATIC DIAGRAM ...................................................... 4-5
4.3 MSD CPU SCHEMATIC DIAGRAM ............................................. 4-7
4.4 A/HP SEL SCHEMATIC DIAGRAM .............................................. 4-9
4.5 DVMAIN SCHEMATIC DIAGRAM .............................................. 4-11

TABLE OF CONTENTS

Page
Section
4.6 PHY SCHEMATIC DIAGRAM ..................................................... 4-13
4.7 DVEQ/DVANA SCHEMATIC DIAGRAM ..................................... 4-15
4.8 PRE/REC SCHEMATIC DIAGRAM ............................................ 4-17
4.9 VIDEO SCHEMATIC DIAGRAM ................................................. 4-19
4.10 CDS SCHEMATIC DIAGRAM .................................................... 4-21
4.11 DSP SCHEMATIC DIAGRAM ...................................................... 4-23
4.12 TG/VDR SCHEMATIC DIAGRAM .............................................. 4-25
4.13 REG CTL SCHEMATIC DIAGRAM ............................................. 4-27
4.14 REGULATOR SCHEMATIC DIAGRAM ...................................... 4-29
4.15 STROBE SUB SCHEMATIC DIAGRAM ..................................... 4-31
4.16 DSC SCHEMATIC DIAGRAM .................................................... 4-33
4.17 AU DSP SCHEMATIC DIAGRAM .............................................. 4-35
4.18 B/W AND IR/TALLY SCHEMATIC DIAGRAMS .......................... 4-37
4.19 MDA SCHEMATIC DIAGRAMS .................................................. 4-39
4.20 IRIS & AF/ZOOM SCHEMATIC DIAGRAM ................................ 4-41
4.21 CCD SCHEMATIC DIAGRAM .................................................... 4-43
4.22 MONITOR A SCHEMATIC DIAGRAM ........................................ 4-45
4.23 MMC, W/B SENS AND EJECT SCHEMATIC DIAGRAMS ......... 4-47
4.24 STROBE SCHEMATIC DIAGRAM ............................................. 4-49
4.25 AUDIO AD/DA SCHEMATIC DIAGRAM ..................................... 4-51
4.26 MAIN AUDIO SCHEMATIC DIAGRAM ....................................... 4-53
4.27 AU NR SCHEMATIC DIAGRAM ................................................. 4-55
4.28 VF A SCHEMATIC DIAGRAM .................................................... 4-57
4.29 JACK SCHEMATIC DIAGRAM ................................................... 4-59
4.30 CAMERA OPE UNIT, SUB OPE ASSY, ZOOM UNIT
AND DECK OPE UNIT SCHEMATIC DIAGRAMS .................... 4-61
4.31 MAIN CIRCUIT BOARD ............................................................. 4-63
4.32 MDA AND CCD CIRCUIT BOARD ............................................. 4-69
4.33 MONITOR CIRCUIT BOARD ..................................................... 4-71
4.34 MMC AND STROBE CIRCUIT BOARD ...................................... 4-73
4.35 AUDIO VF CIRCUIT BOARD ..................................................... 4-75
4.36 JACK, W/B AND EJECT CIRCUIT BOARD ................................ 4-77
4.37 POWER SYSTEM BLOCK DIAGRAM ....................................... 4-79
4.38 VIDEO SYSTEM BLOCK DIAGRAM .......................................... 4-81
4.39 REGULATOR SYSTEM BLOCK DIAGRAM ............................... 4-83
4.40 VOLTAGE CHARTS .................................................................... 4-85
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ........................ 5-1
5.2 FINAL ASSEMBLY <M2> .............................................................. 5-3
5.3 MECHANISM ASSEMBLY <M3> .................................................. 5-6
5.4 ELECTRONIC VIEWFINDER ASSEMBLY <M4> ......................... 5-8
5.5 MONITOR ASSEMBLY <M5> ....................................................... 5-9
5.6 ELECTRICAL PARTS LIST ........................................................ 5-10
MAIN BOARD ASSEMBLY <01> ................................................ 5-10
MDA BOARD ASSEMBLY <02> ................................................. 5-20
CCD BOARD ASSEMBLY <03> ................................................ 5-21
MONITOR BOARD ASSEMBLY <04> ........................................ 5-22
MMC BOARD ASSEMBLY <06> ................................................ 5-23
STROBE BOARD ASSEMBLY <07> .......................................... 5-23
AUDIO VF BOARD ASSEMBLY <08> ........................................ 5-24
JACK BOARD ASSEMBLY <09> ................................................ 5-26
W/B BOARD ASSEMBLY <11> ................................................. 5-26
EJECT BOARD ASSEMBLY <12> .............................................. 5-26
6. AC POWER ADAPTER (AA-V51U)
6.1 CABINET ASSEMBLY <MA> ........................................................ 6-1
6.2 SCHEMATIC DIAGRAM ............................................................... 6-2
6.3 CIRCUIT BOARD ......................................................................... 6-4
6.4 ELECTRICAL PARTS LIST .......................................................... 6-5
Title Page