4Fuser unit error (ERROR 71), (ERROR 72), (ERROR 73)
•Turn the power OFF/ON.
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• Does a fuser unit error occur immediately?
• | Yes Is the thermistor open or shorted? | ||
| Measure the resistance between thermistor contacts. | ||
| (About 220 kΩ at room temperature, 25°C) | ||
| (See Chapter 7.3 for the measuring points.) | ||
| • | Yes | Replace the fuser unit. |
▼ | A | No | Is a cable of the thermistor connected to "CN8" connector on the |
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| Power Supply Unit (High Voltage)? |
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| Is there any flaw on the cable of the thermistor ? |
| • | No | Adjust the thermistor contact so as to touch the contact assembly |
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| properly. |
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• Yes Does appear the
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| • | No | Replace the Main board. |
▼ | Yes | Replace the Power Supply Unit (High Voltage). | ||
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• | No | Does a fuser unit error occur after more than 120 seconds from the | ||
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| • | No | Go to A |
▼ | Yes | Turn the power OFF/ON. | ||
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• Is the heater of the fuser unit turned on? (When the heater is turned on, heat is radiated.)
• B | • | Yes | Is a cable of the thermistor connected to "CN8" connector on the |
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| Power Supply Unit (High Voltage)? |
| • | No | Is a cable of the heater connected to "CN2" connector on "Power |
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| Supply Unit" (120V or 230V) |
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To on the next page B .
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To on the next page A .
40930701TH DRAFT Vesion | 148 / |