e-STUDIO520/600/720/850 FUSER UNIT March 2005 © TOSHIBA TEC
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(9) Fuser roller front thermistor (THM1)
This thermistor cannot be used for the temperature control of the fuser roller. It detects a temper-
ature abnormality at the side area of the fuser roller where the paper does not pass through.
(10) Fuser roller center thermostat (THMO1) and Fuser roller side thermostat (THMO2)
These thermostats cut off the power supply to the IH coil (IH-COIL) when the fuser roller
becomes abnormally hot as the result of a problem such as a thermistors (THM1, 2 and 3) mal-
function. The thermostats (THMO1 and 2) of this equipment are used to prevent abnormal oper-
ation, and when any abnormality is detected, they must be replaced altogether with the other
damaged parts of the fuser unit.
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