B245/B276/B277/B268/B269 Service Manual 18-Jan-06
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Fusing Unit Drive and Release Mechanism
Fusing Unit Drive
The main motor [C] drives the fusing unit through a gear train, and drives the paper exit
rollers [A] through the timing belt [B].
Drive Release Mechanism
When the right door [I] is open, the spring [G] pushes the top end of the gear holder [F] to the
right. The drive gear is released from the fusing-unit drive gear [J]. When you close the right
door, the mechanical link [H] pushes the spring [G]. The gear holder turns counterclockwise
by the force of another spring [D], and engages with the fusing-unit drive gear.
Contact/Release Control
The drive power is not transmitted to the fusing unit during warming up when the fusing
temperature (at the start) is 18°C or higher. The drive power is transmitted when the fusing
temperature is less than 18°C. This contact/release control is based on the following
conditions.
Fusing Temp. Contact/Release
18C or higher Release
Less than 18C Contact
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