04/2016
8-17
Phaser 4600/4620/4622 Printer Service Manual
Major IOT Assemblies
8 Principles of Operation
Revised
Figure 11 Image Processor Board
MCU Board
The MCU Board manages the printing operation according to information obtained through
communications with the IP Board and from sensors and switches located throughout the
printer.
The MCU Board performs these functions:
• Communicates with the Image Processor.
• Controls the print sequence.
• Distributes low DC voltages to various printer components.
• Monitors printer status.
• Maintains a running print count.
• Writes the NVRAM settings.
• Controls printer options.
Figure 12 MCU Board
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