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e-STUDIO2006/2306/2506/2007/2307/2507/2303A/2303AM/2803AM/2309A/2809A
OUTLINE OF THE MACHINE
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[ 2 ] Temperature detection section
To maintain the surface temperature of the fuser roller at a certain level, 3 thermistors (center, side and
edge) detect the surface temperature of the fuser roller to turn ON/OFF and control 2 heater lamps
(center and side)
.
1. Fuser unit error status counter control
- To enhance the safety of the fusing section unit, SoC provides the following protection: When the
second [C412] error has occurred after one consecutive [C411] error, the heater lamp is not
turned ON and error [C412] is displayed immediately even if an operator turns OFF the power
and back ON. However, if the equipment goes into a ready state normally with the fuser unit error
status counter “1” or below, the counter is cleared to “0”.
- If the error codes [C411] to [C452] are displayed and still not cleared even though the thermistor,
thermostat and heater lamp have been repaired (and the power ON/OFF does not clear the
error), check the Setting Mode (08-2002) to set the fuser unit error status counter to “0”.
Remarks:
• If the heater lamp does not turn ON and the service call [C411] is displayed immediately after
the power is ON, ensure the fuser unit error status counter is “2” or over. If it is “2” or over, be
sure to check the thermistor, thermostat and heater lamp. Reset the counter to “0” after
repairing them, then turn ON the power.
• If the fuser unit error status counter is “20” or over (e.g., 31), the data in the memory
*
or the
memory itself may possibly have been ruined due to causes such as leakage from the
chargers. Check the bias, high-voltage transformers and charge wires to see if any of them is
defective, and also look through all the data in the memory.
* 23LA/23LM/28LM: IC10
20L/23L/25L/20H/23H/25H,23HA/28HA: IC11
• When the thermistors detect overheating, the SoC decides the error code and counter value
of the fuser unit error status, and turns OFF each output (the heater lamp, control panel
display, motors and so on) to protect the fuser unit.
Error code: [C449]
Counter value of the fuser unit error status: 08-2002
Thermistors continue detecting the abnormal temperature even after the error codes and
counter values are decided. Even if the power is turned ON immediately, the heater lamp is
automatically turned OFF again when the surface temperature of the fuser roller is still higher
than the abnormal temperature detected.
Wait until the surface temperature of the fuser roller is lowered enough, and turn ON the
power to check the counter value. After confirming that it is the fuser unit abnormality, correct
the abnormality and reset the counter value (08-2002) to “0” to start up the equipment
normally.
