C4170-90959
Sequence of Operation
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Power On Sequence
The sequence from power on until the printer enters the STBY period is as follows:
1 Power on.
2 CPU initialization.
3 Video interface communication start.
4 Fusing heater drive.
5 Main motor and fan drive.
Determines the paper detection status of each sensor in the printer immediately before
driving the main motor, and assesses a paper jam if residual paper is detected.
6 High voltage control.
Determines whether or not the toner cartridge is installed, and if so cleans the transfer
charging roller after the primary charging AC bias is turned on.
7 Residual paper check.
After starting the main motor, checks again for residual paper in the printer. If it finds
paper, the printer assesses a paper jam or automatically delivers the residual paper
according to the situation.
8 Failure/abnormality check.
In the steps above, the printer detects any door open condition, fan motor failure, or
fusing assembly failure when they occur.
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