Table Of Contents - Avision AD280 Service Manual

Contents
1. INTRODUCTION ............................................................................................. 1-1
1.1 GENERAL NOTES FOR SERVICING ............................................................. 1-1
2. PRECAUTIONS OF INSTALLATION/TRANSPORTATION .................................. 2-1
2.1 PRECAUTIONS OF INSTALLATION ............................................................. 2-1
2.2 TRANSPORTATION ................................................................................. 2-1
3. THEORY OF OPERATION ................................................................................ 3-1
3.1 INTRODUCTION ..................................................................................... 3-1
3.2 MAIN CONTROL UNIT .............................................................................. 3-2
3.2.1 System diagram .......................................................................... 3-2
3.2.2 Cable Connection......................................................................... 3-3
3.2.3 Power supply .............................................................................. 3-3
4. PROBLEM SOLVING........................................................................................ 4-1
4.1 DIAGNOSTICS ....................................................................................... 4-1
4.1.1 Online diagnostics........................................................................ 4-1
4.1.2 Offline diagnostics ....................................................................... 4-2
4.1.3 Diagnostic flowcharts ................................................................... 4-3
4.2 TROUBLESHOOTING ............................................................................... 4-5
4.2.1 Flowcharts .................................................................................. 4-5
4.2.2 Tables........................................................................................ 4-8
5. CLEANING THE SCANNER............................................................................... 5-1
5.1 C
LEANING THE
5.2 C
LEANING THE
6. DISASSEMBLY................................................................................................ 6-1
6.1 PROCEDURE FOR DISASSEMBLY AND REASSEMBLY ..................................... 6-1
6.1.1 Notes on disassembly................................................................... 6-1
6.1.2 Removing the Output Tray ............................................................ 6-2
6.1.3 Removing the Input Tray .............................................................. 6-3
6.1.4 Removing the Reverse Roller......................................................... 6-6
6.1.5 Removing the Reverse Roller Cover................................................ 6-8
6.1.6 Removing the Front Cover ............................................................ 6-9
6.1.7 Removing the UI Board .............................................................. 6-12
6.1.8 Removing the Top Cover and Bottom Cover................................... 6-14
6.1.9 Removing the Left/Right Covers .................................................. 6-17
6.1.10 Removing the Upper Base and Bottom Base .................................. 6-19
6.1.11 Removing the Glass Assembly from Upper Base ............................. 6-22
6.1.12 Removing the Springs from Upper Base ........................................ 6-23
6.1.13 Removing the LED Light Bar from Upper Base................................ 6-24
6.1.14 Removing the Gear from Upper Base ............................................ 6-26
ADF.................................................................................... 5-1
ADF G ........................................................................... 5-3
LASS
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