Appendix C: Theory of operation
POR sequence
At power 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 identifying 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 computer 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.
Print cycle operation
Flowchart
charge
expose
clean
clean
first transfer
develop
fuse
second transfer
7421
Appendix C: Theory of operation
741
To Next Page
Loading...
