Transfer Corona Circuit - Ricoh M5 Service Manual

3. Transfer Corona Circuit

The above diagram shows the transfer corona control circuit in block form.
The dc power supply board supplies +22 volts to CN714-1 of the transfer/bias power pack. The
de/de converter changes this input to the high voltage used by the transfer corona.
The CPU drops CN101-7 to O volt to turn on the transfer corona.
This signal is applied when the Start key is pressed.
corona at the 810th pulse.
VRT is factory adjusted; do not adjust it in the field.
It goes back to HIGH, turning off the transfer
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May, 25, 1985