Canon LBP3250 Series, Service Manual, Page: 21 / 98

Chapter 2
2-2
2.2.2 Power-On Sequence
0019-9508
The sequences from the power-ON to the STBY period are described below.
1) Power-ON
2) CPU initialization
3) Video interface communication start
4) Residual paper check
Detecting paper presence by each sensor signaling.
5) Initial drive for main motor
6) Initial drive for fixing heater
Controlling fixing temperature targeting for 120 deg C.
7) Initial drive of the scanner motor.
8) High-voltage control
Detect cartridge presence after primary charging AC bias is applied.
Cleaning transfer roller.
9) Failure/Abnormality check
Detecting fixing unit failure and door open during above periods.