HP CM6030 Service Manual - Page 244
Duplexing reverse and feed control, pickup unit.
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All these components are driven by the duplexing driver, according to signals from the DC controller. If the DC controller cannot communicate with the duplexing driver, it notifies the formatter that the duplexing unit has failed. Duplexing reverse and feed control The duplexing reverse procedure pulls the paper into the duplexing unit after it exits the fuser, and the duplexing feed procedure moves the paper through the duplexer so it can enter the product paper path to print the second side of the page. 1. After the first side has printed, the duplexing flapper solenoid is opened, which creates a paper path into the duplexing-reverse unit. 2. After the paper has fully entered the duplexing-reverse unit, the duplexing-reverse motor reverses and directs the paper into the duplexing-feed unit. 3. The duplexing re-pickup motor and duplexing feed motor move the paper into the duplexing repickup unit. 4. To align the paper with the toner image on the ITB, the duplexing re-pickup motor stops and the paper pauses until the specified time. 5. The paper re-enters the paper path, and the second side is printed. 198 Chapter 5 Theory of operation ENWW
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