Power On Sequence - Canon LBP-1000 Service Manual

C. Power ON Sequence
The sequence from power-ON until the printer enters the STANDBY mode is shown below.
1) Power-ON
2) CPU initialization
3) Video interface communication start
4) Fixing heater drive
5) Main motor and fan drive
Detects 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
Detects whether or not the cartridge is installed and cleans the transfer charging roller after
the primary charging AC bias is turned ON.
7) Residual paper check
After starting the main motor, performs detection of the residual paper in the printer again.
If the residual paper is detected, the printer assesses a paper jam or delivers the residual
paper automatically according to the situation.
8) Failure/abnormality check
In the periods above, door open, fan motor failure, and fixing unit failure are detected as the
need arises.
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