●
Frequency detection circuit failure
◦
The ZEROCROSS signal is not detected within a specified period after the product is turned
on.
●
Fuser-presence detection
The DC controller determines if the fuser is installed in the product. The DC controller detects a
fuser-presence according to the FUSER PRESENCE (/FUSERARI) signal when any of the following
occurs:
◦
The product is turned on.
◦
The door is closed.
NOTE: The DC controller notifies the formatter when it detects a fuser absence.
Other functions
The pressure roller cleaning clears the toner accumulated on the pressure roller surface by transferring it
to the paper according to a command from the formatter. The operational sequence of the pressure
roller cleaning is as follows.
Pressure roller cleaning
1. The DC controller picks up the paper from the designated input source when it receives a cleaning
command from the formatter.
2. The fuser motor repeatedly drives-and-stops at interval when the trailing edge of paper passes
through the transfer roller. The fuser heater is turned on-and-off at the same time.
3. The toner adhered to the pressure roller surface is fused onto the paper. Accordingly, the pressure
roller is cleaned.
4. The paper with the fused toner is delivered out of the product.
ENWW
Engine-control system
15
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