Temperature Contorl - Samsung ML-451 Series Service Manual

2. Product Specifications and Description

2.2.7.4. Temperature Contorl

When the main switch turns on, the CPU turns on the fusing lamp. The lamp stays on until the NC sensors detect the standby
temperature. Then the CPU raises the temperature up to the printing temperature.
Th e rmos ta t 1
Th e rmos ta t 2
Overheat Protection
The CPU cuts power to the fusing lamp in the following cases:
•
The fuser belt temperature detected by the NC sensor becomes higher than the standard for overheat.
•
The heating temperature detected by the thermistor becomes higher than the standard for overheat.
The following components are destroyed when thermistor overheat protection fails:
•
Two thermostats for the fuser belt get into line with the common ground line of the fusing lamp.
•
If one of the thermostat temperatures becomes higher than 190°C, it opens and cuts power to the fusing lamp. If the
other thermostat temperature becomes higher than 190°C, it also opens and cuts power to the fusing lamp.
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La mp 1(700W) : Ce n te r h e a tin g
NC S e n s or1
Th e rmis tor1
La mp 2(600W) : S ide h e a tin g
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