Ricoh FW780 Service Manual - Page 166

5.9 FUSING TEMPERATURE ADJUSTMENT [A] [B] Caution: When the main switch is turned on, the machine will suddenly start to drive the fusing section. Keep your hands away from any mechanical and electrical components during this period. This procedure is required only when the hot roller thermistor is replaced. Adjustment standard: Mode 1 (155°C), Mode 2 (160°C), Mode 3 (165°C), Mode 4 (170°C), Mode 5 (180°C), Mode 6 (190°C), Mode 7 (196°C) 1. Turn off the main switch. 2. Remove the copier rear cover. 3. Remove the pressure roller thermistor screw and hang the thermistor by the harness. 4. Actuate the fusing exit safety switch [A]. 5. Turn on the main switch, select the normal fusing temperature mode, and wait for longer than 10 minutes. 6. Using a digital thermometer and probe [B], measure the temperature at the middle of the hot roller. 7. If the actual temperature is different from the value for the mode being used (use SP#1 to find out the current mode), adjust the temperature using SP#-7. 8. Repeat steps 5 to 7 and confirm the temperature. 9. Reassemble the machine. A163 5-32 SM