Ricoh infotec 3671F Service Manual page 35

July 30th, 1996
2.2.8. Fusing
1. Fusing Temperature Control
[B]
The power supplied to the lamp [A] is controlled by the MCB. The MCB uses
the thermistor [B] to determine when to turn the fusing lamp on and off.
When the main switch is turned on, the machine turns on the fusing lamp and
raises the fusing temperature to 181° C. For printing, the machine keeps the
fusing temperature at 176° C.
When the printing operation is finished, the machine keeps the fusing
temperature at 161° C for 3 minutes (depending on the power saver mode
settings).
Points to note:
•
Printing temperature: 176° C
•
Thermistor maximum: 250° C
•
Thermostat maximum: 180° C (the temperature of the hot roller would
be about 300° C.
2. Power Saver Mode Settings
The behaviour of the machine after printing depends on the following:
User level Power Saver Mode setting (100 ° C or room temperature)
•
•
Power Saver Mode timer (system bit switch 0B, bits 2 and 3)
- User Setting: Fusing Lamp On (100 ° C) -
After printing, the fusing lamp temperature drops to 161° C. Then, the fusing
lamp temperature will fall back to 100 ° C after 3 minutes, regardless of the
system bit switch setting.
[C]
2-18
DETAILED SECTION DESCRIPTIONS
C: Thermostat
PRINTING
[A]
H528D519.wmf