Gestetner A193 Service Manual page 451

IMAGE FUSING
10.3 FUSING UNIT FAN
[A]
A224D505.wmf
The fusing unit fan [A] has been added below the fusing unit. The fusing unit
fan is necessary because the wattage of the fusing lamp is higher than in the
A193 machine, as a result of the higher copy speed.
The fusing unit fan turns on if the charge roller thermistor detects a
temperature in the machine of over 43°C when the main motor starts to rotate
or at any time that the main motor is rotating.
The fusing unit fan will stop when either the main motor stops or the
temperature in the machine falls below 40°C.
SM 13-17 A224