Ricoh FW780 Service Manual page 409

5.1.9 FUSING TEMPERATURE ADJUSTMENT
[A]
!
CAUTION
When the main switch is turned on, the machine will suddenly start to drive
the fusing section. However, this does not occur immediately. The machine
waits until the hot roller is heated to above 80 C. 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 (165 C), Mode 2 (170 C), Mode 3 (175 C), Mode 4
(180 C), Mode 5 (190 C), Mode 6 (193 C), Mode 7 (198 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 at least 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.
SM
[B]
B047R538.WMF
5-3
FUSING
B047/B048