Service manual

Figure 4-1 Engine control system
Power-on sequence
The power-on sequence is for the purpose of the printer initialization and checking for possible
malfunctions.
The following is the sequence from when the printer is turned on until it enters STBY mode.
1. Power on
2. Central processing unit (CPU) initialization
3. ASIC initialization
4. Video interface communication start
5. Residual paper check by each sensor signaling paper presence
6. Initial drive for main motor, pickup motor, and fuser/delivery motor
7. Fuser heater initial drive by controlling fuser temperature targeting for 100°C
8. Initial drive for scanner motor
9. Failure/Abnormality check
● Detect scanner failure
● Fuser failure
●
Door open during the above periods
10. Communication with memory tag
11. Cartridge presence detection
Motors and fans
The DC controller PCB controls four motors.
ENWW Engine control system 37