Output Technology LaserMatrix LM2405, Руководство оператора

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7-42 Troubleshooting
Several factors may contribute to the inability of the fuser to maintain a
fusing temperature:
•
Thick media or media with a high moisture content may act like a heat
sink to rob the fuser of heat.
•
A weak fuser lamp may not supply enough heat.
•
The line voltage may not be adequate, or the power source might be
incorrect, powering a 230 vac printer from a 115 vac outlet, for
example.
A permanent fuser failure can occur when the fuser temperature is too high
rather than too low, as in the case of a temporary failure, and is often
caused by a tripped fuser thermal breaker.
Temporary failures due to a fuser temperature that is too low can lead to a
permanent failure due to high fuser temperature if not corrected. A low
fuser temperature allows toner to build up and bake onto the fuser heat
roller and its thermistor. The built-up toner insulates the fuser from the
fuser’s thermistor which causes the temperature of the fuser to rise. Under
normal circumstances, the thermistor regulates power to the fuser’s heat
lamp and shuts it off if the temperature gets too high. If the temperature
continues to rise, the thermal breaker blows before the thermistor can shut
off power to the fuser’s heat lamp, which causes a permanent fuser failure.
A blown thermal breaker must be replaced by a service technician.
The best insurance against a permanent fuser failure is preventing toner
buildup on the fuser. To prevent toner buildup,
•
Select the correct Fuser Temp= ... in the Extended Configuration
Menu.
•
Keep the print density setting at 1, 2, or 3,. but never below 1.