Side misregistration failure detection The duplex controller determines a side misregistration sensor failure and notifies the formatter when it encounters any one of the following condition: ● The photoreceiver sensor does not output as prescribed when the product is turned on, when the duplexer is installed to the product or when the light intensity is adjusted before the paper is fed to the duplexer. ● The side registration sensor does not detect the home-position.
● An NVRAM data abnormality or communication error occurs when the product is turned on, when the duplexer is installed to the product or when the light intensity is adjusted and write/read the NVRAM data during duplex printing. Duplexer jam detection The duplexer uses the following sensors to detect the presence of paper and to check whether the paper is being fed correctly or has jammed:
● Duplex reverse sensor (SR1) ● Duplex re-pickup sensor (SR2) Figure 1-64 Duplexer jam detection sensors SR1 SR2 Simplex paper path Duplex reverse sensor Duplex re-pickup sensor Duplex paper path Fuser output stay jam 2 The fuser output sensor does not detect the trailing edge of paper within a specified period from when it detects the leading edge. 82 Chapter 1 Theory of operation ENWW