Phaser 6121MFP Service Manual 2-15
Theory of Operation
Control Start Decision
Either of the following two control start decisions is made according to the
temperature detected by the temperature/humidity sensor. The fusing
temperature during the print cycle varies depending on the type of the start
control carried out, either low temperature or ordinary start control.
Wait Control
Control is provided to ensure that the temperatures at different parts of the Fuser
reach a constant level during the wait state.
Control Start Timing
• At the end of the warm-up control.
• At the end of the post-print cycle control (print start control).
Control Termination Timing
• The front cover is opened and closed.
• A malfunction or media misfeed occurs.
Print Control
To ensure a good fixing level and light transmission performance, the fusing speed
and Fuser Roller temperature are controlled.
Control Start Timing
A print request is received.
Control Termination Timing
A malfunction or media misfeed occurs.
Control Start Decision Environment on Start
Low temperature start control The temperature/humidity sensor detects a
temperature lower than the predetermined
value.
Ordinary start control The temperature/humidity sensor detects a
temperature equivalent to, or higher than, the
predetermined value.
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