Transfer Corona Current Adjustment - Ricoh FT5540 Service Manual

31 August 1989

8.8 Transfer Corona Current Adjustment

Optimum Adjusting Value: DC + 18.5 + 1.0 µA
1. Reinstall the TC/SC corona unit and position the drum shoe at the center of the shaft, so
that the axis of the current sensing plate [A] is aligned with the transfer corona wire [B].
2. Select the dc 200 µA range on the digital multimeter.
3. To turn on the transfer corona, turn on the switching PCB dip switch corresponding to "T"
on the TC/SC power pack PCB. (The silk screen printed on the TC/SC power pack PCB is
correct.)
4. Adjust the corona current by turning VR "T" [C] on the TC/SC power pack. (Wait 30
seconds for the current to stabilize.)
5. Remove the drum shoe, and reassemble.
6. Check copy quality.
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