JVC GR-DVL725U, Service Manual

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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 ............................................................. 1-2
1.3.1 Disassembly flow chart ................................................... 1-2
1.3.2 Disassembly method ...................................................... 1-3
1.4
4
MONITOR ASSEMBLY ..................................................... 1-7
1.4.1 Disassembly/assembly of monitor assembly
(for 2.5”-type LCD) .......................................................... 1-7
1.4.2 Disassembly/assembly of hinge assembly
(for 2.5”-type LCD) .......................................................... 1-7
1.4.3 Disassembly/assembly of monitor assembly
(for 3.5”-type LCD) .......................................................... 1-8
1.4.4 Disassembly/assembly of hinge assembly
(for 3.5”-type LCD) .......................................................... 1-8
1.5
5
E. VF ASSEMBLY .............................................................. 1-9
1.5.1 Disassembly/assembly of E.VF assembly
(for the B/W VF) .............................................................. 1-9
1.5.2 Disassembly/assembly of E. VF assembly
(for COLOR VF) ............................................................ 1-10
1.6 DISASSEMBLY/ASSEMBLY OF
0
OP BLOCK
ASSEMBLY/CCD BOARD ASSEMBLY ............................... 1-11
1.6.1 Precautions ................................................................... 1-11
1.6.2 How to remove CCD board assembly and CCD
base assembly .............................................................. 1-11
1.6.3 How to assemble CCD base assembly and CCD board assembly . 1-11
1.6.4 Replacement of service repair parts ............................. 1-11
1.7 EMERGENCY DISPLAY ..................................................... 1-12
1.8 SERVICE NOTE .................................................................. 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 disassemby/assembly ............... 2-1
2.2 JIGS AND TOOLS REQUIRED FOR DISASSEMBLY,
ASSEMBLY AND ADJUSTMENT ......................................... 2-2
2.2.1 Tools required for adjustments ........................................ 2-2
2.3 DISASSEMBLY/ASSEMBLY OF MECHANISM ASSEMBLY 2-3
2.3.1 General statement .......................................................... 2-3
2.3.2 Explanation of mechanism mode ................................... 2-3
2.3.3 Mechanism timing chart .................................................. 2-4
2.4 DISASSEMBLY/ASSEMBLY OF MECHANISM ASSEMBLY 2-5
2.4.1 Follow chart .................................................................... 2-5
2.4.2 Disassembly/assembly ................................................... 2-8
2.4.3 List of procedures for disassembly ............................... 2-14
2.5 CHECKUP AND ADJUSTMENT OF MECHANISM PHASE .. 2-15
2.6 MECHANISM ADJUSTMENTS .......................................... 2-16
2.6.1 Assembling slide deck assembly and main deck assembly . 2-16
2.6.2 Locating tension pole .................................................... 2-17
2.7 SERVICE NOTE .................................................................. 2-18
2.8 COMPATIBILITY ADJUSTMENT ........................................ 2-20
2.8.1 Jig connector cable connection .................................... 2-20
2.8.2 Tape pattern check ....................................................... 2-21
TABLE OF CONTENTS
Section Title Page Section Title Page
3. ELECTRICAL ADJUSTMENT
3.1 PRECAUTION ....................................................................... 3-1
3.2 SETUP .................................................................................. 3-2
4. CHARTS AND DIAGRAMS
NOTES OF SCHEMATIC DIAGRAM .......................................... 4-1
CIRCUIT BOARD NOTES ........................................................... 4-2
4.1 BOARD INTERCONNECTIONS ........................................... 4-3
4.2 MAIN IF SCHEMATIC DIAGRAM ............................................... 4-5
4.3 SYSCON SCHEMATIC DIAGRAM ............................................. 4-7
4.4 D.CPU SCHEMATIC DIAGRAM ................................................. 4-9
4.5 MDA SCHEMATIC DIAGRAM .................................................. 4-11
4.6 AUDIO SCHEMATIC DIAGRAM ............................................... 4-13
4.7 DVMAIN SCHEMATIC DIAGRAM ............................................ 4-15
4.8 PRE/REC SCHEMATIC DIAGRAM .......................................... 4-17
4.9 VIDEO I/O SCHEMATIC DIAGRAM ......................................... 4-19
4.10 CDS SCHEMATIC DIAGRAM ................................................ 4-21
4.11 CAMERA DSP SCHEMATIC DIAGRAM ................................ 4-23
4.12 OP DRIVER SCHEMATIC DIAGRAM .................................... 4-25
4.13 TG SCHEMATIC DIAGRAM ................................................... 4-27
4.14 REG SCHEMATIC DIAGRAM ................................................ 4-29
4.15 MONITOR SCHEMATIC DIAGRAM ....................................... 4-31
4.16 LCD BL SCHEMATIC DIAGRAM ........................................... 4-33
4.17 CCD SCHEMATIC DIAGRAM ................................................ 4-35
4.18 JUNCTION SCHEMATIC DIAGRAM ..................................... 4-36
4.19 JACK SCHEMATIC DIAGRAM .............................................. 4-37
4.20 REAR SCHEMATIC DIAGRAM .............................................. 4-38
4.21 B/W VF SCHEMATIC DIAGRAM [GR-DVL725U,DVL820U] . 4-39
4.22 DSC SCHEMATIC DIAGRAM ................................................ 4-41
4.23 USB SCHEMATIC DIAGRAM [GR-DVL920U] ....................... 4-43
4.24 MAIN CIRCUIT BOARD ......................................................... 4-45
4.25 MONITOR CIRCUIT BOARD ................................................. 4-51
4.26 LCD BL CIRCUIT BOARD ...................................................... 4-53
4.27 CCD AND JUNCTION CIRCUIT BOARDS ............................ 4-55
4.28 JACK CIRCUIT BOARD ......................................................... 4-57
4.29 VF CIRCUIT BOARD [GR-DVL725U,DVL820U] .................... 4-58
4.30 REAR CIRCUIT BOARD ........................................................ 4-59
4.31 DSC CIRCUIT BOARD ........................................................... 4-61
4.32 VOLTAGE CHARTS ............................................................... 4-63
4.33 POWER SYSTEM BLOCK DIAGRAM ................................... 4-67
4.34 VIDEO SYSTEM BLOCK DIAGRAM ...................................... 4-69
4.35 REGULATOR SYSTEM BLOCK DIAGRAM .......................... 4-73
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>
[GR-DVL725U, DVL820U] ..................................................... 5-8
5.4 ELECTRONIC VIEWFINDER ASSEMBLY <M4>
[GR-DVL920U] ...................................................................... 5-9
5.5 MONITOR ASSEMBLY <M5> [GR-DVL725U] ................... 5-10
5.5 MONITOR ASSEMBLY <M5> [GR-DVL820U, DVL920U] .. 5-11
5.6 ELECTRICAL PARTS LIST ................................................. 5-12
MAIN BOARD ASSEMBLY <01> ............................................. 5-12
MONITOR BOARD ASSEMBLY <02> ..................................... 5-20
LCD BL BOARD ASSEMBLY <03> ......................................... 5-21
CCD BOARD ASSEMBLY <04> .............................................. 5-22
JUNCTION BOARD ASSEMBLY <05> ................................... 5-22
JACK BOARD ASSEMBLY <06> ............................................. 5-22
REAR BOARD ASSEMBLY <07> ............................................ 5-23
B/W VF BOARD ASSEMBLY <08>(A,B) ................................. 5-23
DSC BOARD ASSEMBLY <10> .............................................. 5-23
GR-DVL725U GR-DVL820U GR-DVL920U
LCD MONITOR(SIZE) 2.5” 3.5” 3.5”
VF UNIT B/W B/W COLOR
RCU UNIT RM-V715U RM-V717U RM-V717U
ANALOG INPUT NOT USED USED USED
EDITING CABLE NOT PROVIDED PROVIDED PROVIDED
MEMORY CARD(MMC) USED(8MB) USED(8MB) USED(16MB)
The following table lists the differing points between Models GR-DVL725U, GR-DVL820U and GR-DVL920U in this serise.