Cpm Down Control; Printing Ready Mode; Low-Temperature Cpm Mode; Hot Cpm Mode - Ricoh MP C2504 Field Service Manual

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After returning to standby mode, the halogen lamp is re-energized, and the fusing temperature is

raised to the "printing ready target temperature." If printing is not required, the machine again

enters the standby mode after a certain time has elapsed.

If printing is required in standby mode during return, the halogen lamp is energized, the fusing

temperature is increased to "target temperature after reload/after paper feed," and the print job

CPM Down Control

To maintain image quality and machine quality, this machine has a low-temperature CPM mode and

high-temperature CPM mode, and implements 3 levels of CPM down according to the usage situation

and machine state.

In a low-temperature environment, the fusing lamp cannot keep up, and it may be difficult to

maintain the fusing target temperature. To handle this, the detection temperature of the fusing center

thermopile is checked every few seconds, and if the detection temperature during the check is

below a threshold value, the CPM is decreased by 1 level.

This low temperature CPM reduction is performed in the following 3 levels:

CPM down level

To shorten warm-up time and reduce the TEC value, this machine employs a fusing unit with a low

heat capacity.

For this reason, the temperature of those parts of the fusing sleeve belt where paper does not pass

easily increases, and the outside of the paper width may get extremely hot. In order to prevent the

belt breakage due to this excessive temperature rise, CPM down is implemented depending on the

usage conditions. CPM down can be implemented in the following 3 levels depending on the

detection temperature of the temperature sensor, or the paper passage time.

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