HP LaserJet 4v/mv Service Manual - Page 72

Figure 5-3 5FMTBLK Formatter System The Formatter PCA is responsible for the following: • Controlling the Power Save mode. • Receiving and processing print data from the various printer interfaces. • Monitoring front control input and relaying printer status information (through the front control and the Bi-Directional I/O). • Developing and coordinating data placement and timing with the print engine. • Storing font information. • Communicating with the host computer through the Bi-Directional Interface. Interface PCA Disk Accessory Formatter PCA SIMM Slots Additional RAM PostScript Firmware MIO Upgrades Parallel Interface Formatter PCA Block Diagram The Formatter PCA receives print data from the Bi-Tronics Interface and converts it into a dot image. The DC Controller synchronizes the Image Formation System with the Paper Feed System, and signals the Formatter to send the print image data. The Formatter sends the print image data (dots) in the form of a VIDEO signal and the printing process begins. The Formatter PCA also provides mounting locations for the MIO PCA, additional memory SIMMs, the PostScript SIMM, and the Disk Accessory. 5-10 Functional Overview