Fusing Temperature Control - Ricoh G104 Service Manual

6.8.2 FUSING TEMPERATURE CONTROL

[D]
[C]
[B]
[A]
[E]
The machine starts to warm up the fusing unit to reach the print ready condition.
When the heating roller temperature gets to the idling temperature [A], the idling
procedure starts to warm up the hot roller. The temperature becomes higher than
the machine ready temperature [B] and reaches the print ready temperature [C]
after the heating roller completes idling.
The temperature increases to the target printing temperature. Then printing starts.
If the temperature does not get to the target printing temperature before 30
seconds (SP 1104 022), printing starts.
The temperature increases to the first print temperature [G] when the first sheet of
paper is printed, but this is only for the first page.
After the printing job, the machine turns off the heating roller to prevent overheating
[F].
The fusing temperature settings can be adjusted.
Fusing roller idling
Fusing roller idle occurs at the following three times:
• Immediately after the power is turned on, or when the machine comes back from
energy saver mode, if the fusing unit temperature is less than 100ºC.
This is [E] on the diagram.
This idling keeps the heating roller warmed up equally while it is heated. This
temperature is controlled with SP 1912-005, and the durations of fusing idling are
controlled with SP 1912-006, and 008 to 013
You can also adjust this with SP1912-002 and 1105-043
• At the end of a job: [F]
This prevents the heating roller's overheating. After printing, the machine turns
the heating roller with no heating. You can adjust the setting with SP1912 007
• At intervals of 4 hours if the machine is not used.
This prevents deformation of the hot roller and pressure roller.
• Controlled by SP 1912-003 (interval) and 004 (duration)
SM
CÓPIA NÃO CONTROLADA
6-59
CÓPIA NÃO CONTROLADA
FUSING
[G]
[F]
G105D948.WMF
G104