- HP All-in-One Printer Manual

104 Theory of operation Q2431-90912
Stacker feed and delivery
The stacker feed and delivery system consists of several feed rollers and guides that the stacker
motor and solenoids drive. Sensors along the stacker paper path detect the arrival and passing
of media and confirm the position of the jogger guide. The jogger guide helps to align the pages
before placing them in the delivery bin.
After the leading edge of the media reaches the fixing delivery sensor (PS108) in the printer, the
DC controller PCA sends a signal to the stacker driver PCA. The stacker driver PCA activates
the deflector solenoid (SL101) for a specific amount of time to move the delivery deflector into
place in the printer which routes the media to the stacker rather than to the printer’s top output
bin. The stacker driver PCA also activates the stacker motor (at the same speed as the printer’s
main motor) to rotate the feed and delivery rollers).
The feed roller moves the media into the stacker. If the DC controller PCA sends a
following-page signal (which means there is another page in the job), the stacker driver PCA
activates the deflector solenoid (SL101) again. The delivery roller moves the media into the
delivery bin.
Figure 34. Stacker feed delivery diagram
Table 34. Stacker components
Component Purpose
Motor Feed motor (M103) Rotates the feed and delivery roller
Solenoid Deflector solenoid (SL1101) Operates the delivery deflector
Sensor Paper inlet sensor (PS1101) Used for jam detection
Paper delivery sensor (PS1102) Used for jam detection
Delivery paper full sensor (PS1106) Detects that the delivery bin is full
Switch Door open switch (SW1101) Detects an open door
Delivery bin
Deflector
Feed roller
Delivery