HP Pro 4300 C9H70UT C9H70UT#ABA manual General descriptions, DC controller PCA

General descriptions

This section describes individual components found in the printer. Information is provided about the following components.

●	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

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.

HP LaserJet 4300 only

Figure 6.DC controller PCA block diagram

Q2431-90912 Chapter 5 Theory of operation 69