EPSON WF-4830, WF-4820 Series Service Manual Page 21-40

EPSON WF-4830 Series/WF-4820 Series Revision A Operating Principles Scanner / ADF Overview 21 Confidential The WF-4820 Series detects the status of documents set on the ADF using the ADF document lever and scanner CIS sensor. The CIS sensor reads the status of the tip of the lever that is moved up/down by the paper, thus determining the presence of paper. Additionally, there is a sub document lever to the sides of the ADF document lever. If the sub document lever cannot read the tip using the CIS sensor, this determines that the scanner unit is open, or that the CIS sensor is faulty. Figure 1-16. ADF document lever No paper on ADF Paper on ADF ADF top ADF inside ADF lower surface Sub document lever ADF document lever Sub document lever ADF document lever ADF document lever
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Epson WF-4830 Series Service Manual Page 21-40
Epson WF-4820 Series Service Manual Page 21-40