The sequence of the side registration adjustment operation is as follows: 1. The duplex driver reverses the duplex re-pickup motor (M1502) when it receives a side registration adjustment command from the DC controller. 2. The side registration guide drive cam rotates and the side registration guide home-position sensor (PS1503) detects the home position of the side registration guide. Then the side registration guide moves depending on the media size. 3. The duplex driver stops the duplex re-pickup motor and completes the side registration guide movement.
The duplex driver determines a side registration guide failure and notifies the DC controller when the side registration guide home-position sensor does not detect the home position after the side registration guide drive cam rotates twice. Jam detection (DP) he duplex unit uses the duplex media re-pickup sensor (PS1502) to detect the presence of media and to check whether media is being fed correctly or has jammed. Figure 1-45 Jam detection (DP) PS1502 The duplexer determines a jam if the sensor detects media presence at a specified timing stored in the duplex driver. The duplex driver stops a print operation and notifies the DC controller when it determines a jam has occurred.
Duplex media reverse delay jam ● The duplex media re-pickup sensor (PS1502) does not detect the leading edge of media within a specified period from when the duplex reverse motor starts reverse rotation. Duplex media re-pickup stationary jam ● The duplex media re-pickup sensor (PS1502) does not detect the trailing edge of media within a specified period from when the re-pickup operation starts. 58 Chapter 1 Theory of operation ENWW