Ricoh FT7770 Service Manual page 61

30
April, '89
Corona Unit Ventilation
2
0
The charge corona casing has three slots that allow air from the charge fan
This airflow prevents an uneven build up
to flow through the corona unit.
of positive ions.
The CPU turns on the charge fan by supplying a LOW signal at CN304-B18.
The charge fan motor turns on 100 milliseconds before the main motor.
The ozone fan disperse ozone generated by the eight corona wires.
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