Samsung ML-2851ND/SEE Service Manual page 36

2.2.3.3(d) Fusing
The temperature change of the heat roller°Øs surface is changed to the resistance value through the thermistor.
By converting the voltage value, which impressed to the resistance, to the digital value through the AD converter,
the temperature is decided. The AC power is controller by comparing the target temperature to the value from the
thermistor. If the value from the thermistor is out of controlling range while controlling the fusing, the error stated
in the below table occurs.
• Lamp Method
Error
OPEN HEAT ERROR
LOW HEAT ERROR
OVER HEAT ERROR
=>This can be changed in the future.
2.2.3.3(e) LSU
The LSU is consisted of the LD (Laser Diode) and the polygon motor control. When the printing signal occurs, it
turns on the LD and drives the polygon motor. When the detector detects the beam, Hsync occurs. When the
polygon motor speed becomes strady, Lready occurs. If two conditions are satisfied, the status are not satisfied,
the error shown in below occurs.
Error
Polygon Motor Error
Hsync Error
Service Manual
Product spec and feature
- When warming up, it has been lower than 90
- Standby has been lower than the Standby Reference Temperature -20
- Printing has been lower than the Printing Reference Temperature -20
- When WarmUp End Process, it have been lower than the WarmUp Reference Temperature -10
over 10 seconds.
- It has been higher than 220
- It has been higher than 230
- It has been higher than the Standby Reference Temperature +10
Whenthe polygon motor speed doesn t become steady
The polygon motor speed is steady but the Hsync is not generated
Description
over 20 seconds
over 20 seconds
over 3 seconds
Description
2-26
over 10 seconds.
over 10 seconds.
over 180 seconds.
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