Ricoh FW780 Service Manual - Page 69

The position of the unlit lamp corresponds to the fusing temperature mode as shown below. (Normal) Mode1 Mode 5 Mode 7 Mode 2 Mode 4 Mode 6 Mode 3 (High) Mode 5 Mode 6 Mode 8 Mode 7 (Low) Mode 2 Mode 3 Mode 5 Mode 4 Select the required setting with the Density keys, then press the Copy Media key to store the setting. The Density indicator reverts to its normal operating mode, but it is blinking if the setting just selected is not the same as that stored in the SP Mode setting for the same temperature mode. As can be seen on the diagrams on the previous page, modes 1 to 7 are similar in principle. However, Mode 8 (the highest temperature mode) is a bit different. The hot roller temperature is kept at 195°C and it starts to rotate to keep the pressure roller temperature between 130°C and 145°C. When the hot roller or pressure roller temperature is below the lower limit, copying is disabled. After fusing, paper shrinks slightly, and expands again after a few minutes. The shrinkage and expansion are different at different fusing unit temperatures. Therefore, if the fusing unit operating mode settings have been changed, cutting length adjustment of the roll feeder unit may be required. A163 2-33 SM