Canon NP-70 Service Manual page 76

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NP -70
2)
The developer pump motor (M2) operates to maintain the developer density at a uniform level.
3)
The suction blower (FM2) operates to provide ventilation for any fumes which might build up
within the copier body due to developer evaporation.
4)
The illumination lamps (FL2 & 3) are maintained at an energy level close to that needed for
illumination. This warming action ensures that the lamp illumination will stabilize rapidly
(during Prestart Time) as the next copying operation is begun.
Second PrintingJune, 1974
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