- HP All-in-One Printer Manual

Q2431-90912 Chapter 5 Theory of operation 69
General descriptions
This section describes individual components found in the printer. Information is provided about
the following components.
DC controller PCA
The DC controller PCA controls the operation of the printer and its components. The DC
controller PCA starts printer operation when the printer power is turned on and the power supply
sends dc voltage to the DC controller PCA. After the printer enters the standby sequence (see
table 30 on page 67. the DC controller PCA sends out various signals to operate motors,
solenoids and other printer components based on the print command and image data sent by the
host computer. For a list of DC controller PCA connectors, see figure 233 on page 356.
Figure 6. DC controller PCA block diagram
● DC controller PCA ● 500-sheet feeder
● Power supply assembly ● 1,500-sheet feeder
● Pickup and feed assembly ● envelope feeder
● Laser/scanner assembly ● Duplexer
● Image formation system ● Stacker and stapler/stacker
HP LaserJet 4300 only