Theory of operation
POR sequence
As the printer is turned on, the engine code goes through a series of tests to verify hardware integrity. If a
hardware failure is detected, then it is reported to the printer. If the POR sequence cannot be completed
successfully, then the printer may post an error message. The message states that service may be needed.
Printer control
The printer uses a single processor for both RIP and engine functions. The raster image processor (RIP) code
performs system responsibilities such as PC connection, LAN, ISP attachments, and bitmap generation. The
engine code performs tasks related to the operation of the electrical and mechanical device systems such as
motors, lasers, power supplies, and fusers. The NVRAMs are located on the controller board and control panel,
replacement of either the controller board or control panel will pull or mirror NVRAM data from each other.
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Theory of operation
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