Ricoh Mo-C1, Service Manual, Page: 722 / 1052

The temperature is checked at two points: 1) The temperature/ humidity sensor on the
right side of the machine above the maintenance unit, and 2) The K1 thermistor near the
K1, K2 print heads.
• The temperature/humidity sensor measures the "external" temperature.
• The K1 thermistor measures the "internal" temperature
• The SP codes below affect the readings of the K1 thermistor only (internal
temperature).
Low temperatures can cause paper jams and high temperatures can lead to "misting" of
ink around the print head ink ports.
If the machine detects that the temperature is out of the operational range, it will display
a message, and then the print job print head maintenance operations will stop.
If temperature goes out of range during printing:
• Printing stops and cancels the current job. If print head maintenance is in progress,
the cycle completes then cancels the print job.
• The print heads are capped to keep them from drying out.
• Ink supply stops and the printer goes into standby mode.
• Even if the machine cools down to within the operating range a new job cannot be
started until the machine has been cycled Off/On.
If temperature is out of range at power on
• The power on maintenance cycle will not execute if the machine is too cold the first
time it is powered on at the beginning of the work day.
• The print heads remain capped and there is no ink supply for the power on
maintenance cycle.
• Once the machine enters the operation range, the power on maintenance cycle will
execute and the machine will operate.
• In this case, it is not necessary to cycle the machine off/on.
The following SP codes can be adjusted to change the temperature ranges measured by
the K1 thermistor.
1 High-Stop H
Shuts down the maintenance cycle and puts the machine in standby mode.
[20 to 50/43.5/0.5 °C]
2 High-Detect HM
2. Appendix 2: Service Program Mode
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