Avision AV50F (FF-0803S) - Manual (Page 107)

7.4 Replacing the ADF pad module
Replace the ADF pad assembly under the following conditions:
1.
You experience repeated document jams and cleaning the
ADF pad did not help.
2. As a guideline, replace the pad assembly after about
20,000 scans. You may check the scan count with the
Info tab on the scanner’s TWAIN user interface.
Disassembly Steps:
1. Pull the release knob to open the front door.
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