Download chapter 1 general description

1. Periodically Replaced Parts ............... 4-5
2. Consumable Parts.............................. 4-5
III.
MAINTENANCE ...................................... 4-6
1. User Maintenance .............................. 4-6
2. Service Maintenance.......................... 4-7
CHAPTER 5
TROUBLESHOOTING
I.
ERROR DISPLAY ................................... 5-1
1. Operation Panel ................................. 5-1
2. Computer............................................ 5-3
II.
LIST OF ERRORS .................................. 5-4
1. Operation Errors................................. 5-4
2. Images Errors ..................................... 5-5
III.
OPERATION TROUBLESHOOTING ...... 5-6
1. No Power............................................ 5-6
2. Not Recognized by Computer ............ 5-7
3. Scanning Does Not Start .................... 5-8
4. Slow Scanning Speed ........................ 5-9
5. Motor Does Not Work....................... 5-10
6. Document is Not Fed.........................5-11
7. Document is Not Properly Fed
(Jam/Double Feed/Skew) ................5-11
IV.
IMAGE TROUBLESHOOTING ............. 5-12
1. Completely Black/Completely White 5-13
2. Too Dark/Too Light ........................... 5-14
3. Black Borders Around Image............ 5-14
4. Image Skews .................................... 5-15
5. Moire on Image ................................ 5-15
6. Spots and Streaks on Image ............ 5-16
7. Outer Areas of Image Disappear...... 5-16
APPENDIX
I.
ELECTRICAL BLOCK DIAGRAM ........... A-1
II.
PARTS CATALOG ................................... A-2
1. ADF Unit ............................................. A-2
2. Flatbed Unit ........................................ A-4
COPYRIGHT © CANON ELECTRONICS INC. 2009
CANON DR-2020U FIRST EDITION