Ricoh B234 - Fusing Temperature Control During Machine Operation

FUSING
SM 6-153 B234/B235/B236/D101/D102/D103
Detailed
Descriptions
Fusing Temperature Control During Standby and in Energy Saver Mode
In standby mode, the operation control of the fusing lamps is different for the
B234/B235/D101/D102 and B236/D103.
Model Lamps Used Comment
B234/B235/
D101/D102
Lamp 2 Only 1 lamp is used:
B236/D103 Lamp 2, 3 Two lamps keep the hot roller at the correct standby
temperature: These lamps light on and off alternately so
only one lamp is on at a time.
The fusing lamps heat the hot roller to keep the temperature as follows:
• The lamps are switched ON when the thermistor detects the temperature of the
hot roller surface is lower than the standby temperature (SP1105 001, 002, 003)
• The lamps are switched OFF when the thermistor detects the temperature of the
hot roller surface is higher than the standby temperature (SP1105 001, 002, 003)
+2°C
Fusing Temperature Control During Machine Operation
When the Fusing Temperature Falls below the Lower Limit
During long jobs, some images may not fuse correctly, depending on variables
such as paper and image type, and room temperature.
To prevent poor image fusing:
• If the fusing unit thermistor detects that the temperature of the hot roller has
dropped lower than the lower limit (set SP1105 004 – 006), a message appears
and the job halts temporarily.
• The machine restarts the job once the fusing temperature rises again to the
target operating temperature.
NOTE
• The low limit temperature is different, depending on the temperature mode
currently selected for operation: normal, low, and high temperature mode.