Ricoh FT 4015, Service Manual

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When the main switch is turned on, the CPU turns on the fusing lamp. When
the fusing thermistor detects the ready temperature, the machine enters the
ready condition. After the ready temperature is detected, the CPU keeps the
fusing temperature at 190
°
C for one minute, then the target temperature is
changed to 120
°
C (120 V machines) or 130
°
C (230 V machines).
When the key is pressed, if the fusing lamp temperature is higher than
the ready temperature, the machine starts copying immediately. If the
temperature is lower, the fusing lamp is turned on and the start indicator turns
red and blinks. Copying starts after the fusing temperature reaches the ready
temperature, and the fusing temperature is kept at 190ÉC during copying.
After copying is finished, the fusing temperature is kept at 190
°
C for one
minute.
To prevent any copy quality problem caused by exposure lamp intensity
fluctuation, the fusing lamp does not turn on while the exposure lamp is on,
even if the fusing temperature drops below 190
°
C.
Det
ailed
Descript
ions
20 December 1996 IMAGE FUSING
2-53