AR-C150 (serv.man5). ARC150-Basic Manual - Sharp Copying Equipment Service Manual (repair manual). Page 47

The temperature sensors are provided at the center and the ends of
the upper and the lower heat rollers. The heat roller temperature is
detected by the temperature sensor at the center to control the heater
lamp so that the constant fusing temperature is provided.

The fusing temperature is varied depending on the kind of paper.

Upper heat roller

Lower heat

roller

Ready
condition

177°C

132°C

Power save
mode

137°C

OFF

Print mode

Normal paper

170°C

125°C

OHP sheet

180°C

175°C,

Thick paper

180°C

195°C,

The temperature sensors at the ends of the heat rollers detect a wind-
ing jam when paper winds around the fusing roller.

When paper winds around the fusing roller, it is squeezed between
the temperature sensor at the center and the heat roller, reducing the
detection temperature of the temperature sensor.

While there is no paper around the temperature sensor at the ends,
there is no change in detection temperature.

As a result, a difference is generated in the detection temperatures at
the center and at the ends. This state is detected as a winding error
and the error code is displayed.

When paper is not separated naturally after fusing, it is mechanically
separated from the heat roller by the separation pawl.
(The separation pawl is provided only in the AR-C150.)

In the duplex mode, the duplex gate is turned ON and the paper after
fusing is transported to the duplex section.

∗

The fusing and the paper exit sections are driven by the fusing
motor. 

∗

The fusing and the paper exit sections are controlled by the fusing
control PWB (AC SUB power PWB) and the PCU SUB PWB.

AR-C150

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