11. IMAGE FUSING
11.1 OVERVIEW
After the image is transferred, the copy paper enters the fusing unit. The
image is fused to the copy paper by the process of heat and pressure
through the use of a hot roller [A] and pressure roller [B].
The fusing lamp [C] located inside the hot roller is turned on and off to
maintain the operating temperature of 185°C. The CPU monitors the hot
roller surface temperature through a thermistor [D] which is in contact with
the hot roller’s surface. A thermofuse [E] protects the fusing unit from
overheating.
The hot roller strippers [F] separate the copy paper from the hot roller and
direct it to the exit rollers [G]. The exit sensor [H] monitors the progress of the
copy paper through the fusing unit and acts as a misfeed detector while the
exit rollers drive the copy paper to the copy tray. When the sorter is installed,
the paper sensor on the sorter also functions as a misfeed detector.
[F]
[E]
[D]
[A]
[C]
[B]
[H]
[G]
STM
2-76
FT4220/4222
Summary of Contents for FT4215
Page 1: ...FT4220 4222 4215 SERVICE TRAINING MANUAL ...
Page 12: ...SECTION 1 OVERALL MACHINE INFORMATION ...
Page 28: ...8 AC POWER AND DC POWER DISTRIBUTION FT4220 4222 1 16 STM ...
Page 31: ...SECTION 2 DETAILED SECTION DESCRIPTIONS ...
Page 114: ...SECTION 3 DOCUMENT FEEDER ...
Page 138: ...SECTION 4 SORTER ...
Page 157: ...SECTION 5 DUPLEX ...
