Pressure Roller Cleaning - HP LaserJet Enterprise 700 M712 series Handbuch Zur Fehlerbehebung

The frequency of the ZEROCROSS signal is not detected in a specified value within a specified
period after power-on.
The frequency of the ZEROCROSS signal is not detected in a specified value for a specified
period after power-on and once the signal is detected.
Heater failure
●
A specified current value or lower is detected during the heater drive period of the WAIT period
or when more than a specified electrical power is input.

Pressure roller cleaning

The pressure roller cleaning clears toner on the pressure roller surface by adhering to the paper
according to a command from the formatter. This is executed only when the paper size is A4-R (rotated)
or Letter-R (rotated). The operational sequence of the pressure roller cleaning is as follows:
1.
The DC controller picks up the paper from the designated input source when a cleaning command
is sent from the formatter.
2. When the trailing edge of paper passes through the transfer roller, the fuser motor repeats to
rotate-and-stop at regular intervals and the fuser heater turns on-and-off at the same time.
3.
The toner on the pressure roller fuses onto the paper and the roller clears.
4.
The paper with fused toner is delivered out of the product.
ENWW
Engine control system
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