Overheat Protection - Ricoh G-P3 Service Manual

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:
• Temperature increase for the first page of a job: SP 1104 25 This value is added to the target printing
temperature. The default is "8°C ".
• Duration for application of the temperature increase: SP 1104 26
• The increase is applied if the interval between jobs is greater than these values:
• OHP, Thick paper, or 1200 x 1200 dpi: SP 1104 24
• Other types of job: SP 1104 27
Corrections for Small Paper Sizes (less than A5)
These corrections prevent too much heating of the fusing unit when paper widths less than A5 are used. In
multi-page printing with this size of paper, the heating roller's temperature is not the same in all areas
because the small size paper does not go through the two ends of the heating roller. The temperature of
locations that do not touch the paper becomes higher than other locations during multi-page printing. The
following corrections decrease this problem.
• Print speed: This is decreased after 15 pages. Then, 30 seconds after this, the print speed increases
to the standard temperature again. You can adjust this with SP 1911 1 to 3.
• Fusing temperature: This is decreased in three stages, as shown below.
• Decreased by 2°C after 25 pages are printed (controlled by SP 1911 4 and 14)
• Decreased by 5°C again after 10 more pages are printed (controlled by SP 1911 6 and 16)
• Reduced by 5°C again after 15 more pages are printed (controlled by SP 1911 8 and 18)
There are also temperature reductions for one-sided printing and two-sided printing.
• One sided printing: The temperature is decreased in two steps as shown below
• After 100 pages, decreased by 2°C (controlled by SP 1911 21 and 23)
• After 10 more pages, decreased by 5°C (controlled by SP 1911 22 and 24)
• Duplex printing: The temperature is decreased in two steps as shown below
• After 80 pages, decreased by 2°C (controlled by SP 1911 25 and 27)
• After 10 more pages, decreased by 5°C (controlled by SP 1911 26 and 28)

Overheat Protection

• If the heating roller temperature becomes higher than 230°C, the CPU cuts off the power to the heating
lamp and SC543 shows.
Fusing
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