Ricoh FW780 Service Manual - Page 68

The operating temperature of the hot roller and pressure roller can be adjusted using SP #--7 and SP #--8. These programs are used to compensate for variations in the response of different thermistors. SP #--7 adjusts the hot roller temperature and SP #--8 adjusts the pressure roller temperature. SP #--7 shift the temperature in 1 degree increments (--9°C to +9°C). The fusing temperature can be monitored using SP #--9. - The ready condition - When the hot roller temperature reaches the ready temperature, the copier enters the ready condition, and copying is possible. The ready temperature is anywhere that is 5° lower than the hot roller operating temperature in the selected fusing unit mode. - Fusing Unit Operating Modes - There are three operating temperature modes, selected with the Copy Media key: normal (for use with plain paper), high (for translucent paper), and low (for translucent film). The normal temperature mode can have one of 7 temperature settings (modes 1 to 7; see the diagram on the previous page); the setting is selected using SP#1 or by key operation. The high temperature mode can have one of 4 temperature settings (mode 5 to 8); the setting is selected by SP#2 or by key operation. The low temperature mode can also have one of 4 temperature settings (mode 2 to 5); the setting is selected using SP#3 or by key operation. In this way, the setting of the fusing unit temperature modes can be adjusted to match the paper type more exactly, either by a service technician using SP Modes, or by a key operator. The key operation sequence is as follows. The setting input by this procedure does not overwrite the setting that is stored in the SP Mode. First, select the temperature mode to be adjusted, using the Copy Media key. Then hold the Copy Media key down for longer than 2 seconds; the Density indicator inverts, and the unlit lamp on the indicator shows the current setting. SM 2-32 A163