Ricoh G104, Service Manual

Page: 571 / 601

Fusing
SM 6-21 G160/G161
G160/G
161
2. At the end of a job: [F]
ƒ This prevents the heating roller’s overheating. After printing, the machine turns the
heating roller with no heating. You can adjust the setting with SP 1912 7
3. At intervals of 4 hours if the machine is not used for a long time
ƒ This prevents the deformation of the hot roller and pressure roller.
ƒ Controlled by SP 1912 3 (interval) and 4 (duration)
ƒ Enable/disable this idling feature: SP 1912 1
For fusing idling at the start of a job, the duration and the fusing unit temperature during
idling are also corrected for ambient temperature. SP 1917 controls all the corrections. The
temperature/humidity sensor measures the room temperature. Corrections are made at the
following times:
ƒ Room temperature is below 18ºC (L threshold, controlled by SP 1917 8)
ƒ Room temperature is above 30ºC (H threshold, controlled by SP 1917 7)
Idling Ready Temperature before First Print Job: [A]
This is the idling ready temperature for the heating roller before the first print job. You can
adjust the setting with SP 1912 5. The default is 100°C. If the heating roller temperature
does not reach this temperature within 15 seconds after the heating lamp turns on, SC 542
occurs.
Machine Ready Temperature: [B]
You can adjust the setting with SP 1913 2. The default is 150°C.
Print ready temperature: [C]
You can adjust the setting with SP 1105 22. The default is 160°C.
Target Printing Temperature: [D]
This is adjusted by the value stored in SP 1104 23. This value is added to the print ready
temperature. The default is "5°C (G160)/ 10°C (G161)".
First Print Temperature: [G]
When the machine prints the first page, the heating roller temperature can easily decrease.
If necessary, you can increase the temperature for the first page. This is a good adjustment
for cold environments.
If fusing is not sufficient for the first page of a job, adjust these SPs:
ƒ Temperature increase for the first page of a job: SP 1104 25 This value is added to the
target printing temperature. The default is "2°C (G160)/ 8°C (G161)".
ƒ Duration for application of the temperature increase: SP 1104 26
ƒ The increase is applied if the interval between jobs is greater than these values:
ƒ OHP, Thick paper, or 1200 x 1200 dpi: SP 1104 24
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