Filter
Top Products
Duplexing feed unit (HP 3700 printer only)
The duplexing feed unit reverses the paper after one side is printed and re-feeds it to the
pickup/feed unit for printing the other side.
The following is the sequence of paper feed at the duplexing feed unit.
1. The paper passes through the fuser after the front side is printed.
2. The delivery motor (M2) rotates counterclockwise after a specified period of time from
when the paper has passed the fuser and delivers the paper to the duplexing feed unit.
The paper is reversed here.
3. When the reversed paper sensor (PS9) detects the edge of the reversed paper, the
duplexing feed solenoid (SL5) is turned on to rotate the duplexing feed roller.
4. The paper is fed to the duplexing feed unit by the roller, being positioned in line by the
oblique roller and the delivery guide.
5. The paper stops at the duplex pickup position, as the edge of the paper reaches the
PS10, and the SL5 is turned off.
6. When the duplex pickup is ready, the SL5 is turned on and it feeds the paper into the
printer.
192 Chapter 5 Theory of operation ENWW