Chapter 2
2-16
- If the detected temperature of the thermistor does not reach 70 deg C within a specified
period after it once reaches 40 deg C after the heater energization during the wait period.
- If the detected temperature of the thermistor does not reach the targeted temperature within a specified period under the heater temperature control during the
initial rotation period.
2) Abnormal low temperature
- If the detected temperature of the thermistor is kept 100 deg C or lower for a specified period under the heater temperature control during the print period.
3) Abnormal high temperature
- If the detected temperature of the thermistor is kept 230 deg C or higher for a specified period.
4) Fixing heater drive circuit failure
- If the specified count of the ZERO CROSSING signal is not detected within a specified period after the printer is turned on.
- If the ZERO CROSSING signal is not detected for a specified period during the print period after the signal is once detected after the printer is turned on.
2.7 EXTERNAL AND CONTROLS SYSTEM
2.7.1 Power Supply
2.7.1.1 Power Supply
2.7.1.1.1 Low-voltage power supply
0021-2056
The low-voltage power supply and the fixing power supply convert AC power from the power receptacle into DC power to cover the DC loads.
- Low-voltage power supply:
Generates DC power required in the printer
- Fixing power supply:
Supplies AC power to the low-voltage power supply
Controls the fixing heater temperature in the fixing unit
F-2-20
For low pressure power, insert the AC power in the inlet, switch the power ON, and it will start. The AC power generates +3.3V in the fixing power, +24V in the
+3.3V
Protection circuit
Rectifying
circuit
Zero crossing
circuit
+24V
ZEROX
PSREM24V
Low-voltage power supply
Power switch
SW3001
AC input
+24V generation
circuit
Noise filter
Fuse
FU2801
DC controller
Fixing power supply
Noise filter
Fixing control
circuit
Fuse
FU2901
Power supply unit
+3.3V generation
circuit
Power switch
control circuit
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