3
© 2012 OKI DATA CORPORATION All rights reserved
ES9160 MFP / ES9170 MFP
OUTLINE OF THE MACHINE
3 - 61
3.13.4
Heater Control Circuit
[ 1 ] Configuration
In this equipment, the surface temperature of the fuser roller is controlled by turning ON/OFF 3 heater
lamps (center, side and sub) which have different heat-generating positions with the command from the
engine-CPU on the LGC board.
The surface temperature of the fuser roller is detected by 3 thermistors (center, side and edge) and
then the information of the temperature is transmitted to the engine-CPU and each control circuit.
Based on the detected temperature, the engine-CPU transmits the control signal of the heater lamp to
the control circuit (TRC: Triac) of each heater lamp on the switching regulator via the temperature
control circuit. The power supply to the fuser roller is thus controlled by driving TRC. The temperature
control circuit detects the overheating of the fuser roller. In case that the surface temperature of the
fuser roller has exceeded the specified temperature, the temperature control circuit turns the heater
lamp OFF. If the temperature control circuit does not function for some reason and the fuser roller is
abnormally overheated as the result, a relay OFF circuit transmits a relay OFF signal to turn off the
relay, and to turn the power OFF forcibly.
If the temperature control circuit does not function for some reason and the fuser roller is abnormally
overheated as the result, a forcible power-OFF circuit transmits a reset signal to the power switch to
turn the power OFF forcibly. In addition, if these control circuits do not function with thermistor
abnormality or other reasons and the fuser roller is abnormally overheated as the result, 2 thermostats
(front and center ones in the fuser unit) shut off the power supply to the heater lamps to protect the
equipment.
Fig. 3-36
Relay OFF circuit
Temperature control circuit
A/D
converter
Center heater lamp
Fuser roller
Fuser front
thermostat
Fuser center
thermostat
Edge
thermistor
Side
thermistor
Center
thermistor
Noise
filter
Main power switch
AC line
DC line
Relay
Fuser unit
Relay OFF signal
LGC board
N
Switching regulator
Front
Rear
CPU
Side heater lamp control signal
Center heater lamp control signal
Sub heater lamp
control circuit (TRC3)
ASIC
Sub heater lamp
Center heater lamp
control circuit (TRC1)
Side heater lamp
control circuit (TRC2)
Sub heater lamp control signal
Side heater lamp
L
Содержание ES9160
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Страница 24: ...ES9160 MFP ES9170 MFP 2012 OKI DATA CORPORATION All rights reserved FEATURES 1 2...
Страница 114: ...ES9160 MFP ES9170 MFP 2012 OKI DATA CORPORATION All rights reserved OUTLINE OF THE MACHINE 3 76...
Страница 252: ...ES9160 MFP ES9170 MFP 2012 OKI DATA CORPORATION All rights reserved DISASSEMBLY AND REPLACEMENT 4 138...
Страница 308: ...ES9160 MFP ES9170 MFP 2012 OKI DATA CORPORATION All rights reserved SELF DIAGNOSIS MODES 5 56...
Страница 832: ...ES9160 MFP ES9170 MFP 2012 OKI DATA CORPORATION All rights reserved REMOTE SERVICE 10 38...
Страница 916: ...ES9160 MFP ES9170 MFP 2012 OKI DATA CORPORATION All rights reserved BACKUP FUNCTION 12 8 4 Turn the power OFF...
Страница 920: ...ES9160 MFP ES9170 MFP 2012 OKI DATA CORPORATION All rights reserved BACKUP FUNCTION 12 12...
Страница 922: ...ES9160 MFP ES9170 MFP 2012 OKI DATA CORPORATION All rights reserved WIRE HARNESS CONNECTION DIAGRAMS 13 2...
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