- HP All-in-One Printer Manual

Q2431-90912 Chapter 5 Theory of operation 103
Stacker
The DC controller PCA controls the stacker and sends signals to the stacker driver PCA. The
stacker driver PCA then controls the operation of the stacker components like the stacker motor,
solenoid, and sensors. When the printer power is turned on, dc power from the printer’s low-
voltage supply circuit is supplied to the stacker. The stacker performs the power-on sequence
(see figure 32 on page 102) and enters the standby mode. When it receives a signal from the DC
controller PCA, the stacker driver PCA activates the motors and solenoids as needed to perform
the stack operation.
Figure 33. Stacker driver PCA block diagram