Copy Quality Adjustment - Ricoh FW870 User Manual

25 July 1996

9. COPY QUALITY ADJUSTMENT

– General Information –
Image density is affected by the following factors:
(1) Light Intensity
(2) Bias Voltage
(3) Toner Density
(4) Grid Voltage
(5) Charge Corona Current
The items listed above must be kept in balance to maintain correct image
density.
In the field, image density should be adjusted first by changing the light
intensity. (Adjust the light sensor voltage.) If results are unsatisfactory,
the bias voltage can be changed. Also, if requested by the customer,
the overall image density can be changed by changing the toner
density. Normally, this should be kept at the normal position (factory
setting).
The grid voltage and charge corona current are carefully adjusted at the
factory. Any adjustment out of the adjustment standards will result in over
toning, toner scattering, dirty background, or light image density problems.
The grid voltage and charge corona current adjustment should be done only
when replacing the Charge/Bias/Grid power pack, or to correct certain
problems with image density after checking all other possible causes.
COPY QUALITY ADJUSTMENT
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