Ricoh FT5034 Service Manual page 135

11. Toner Density is too low
Problem
The toner density is too
low.
1. Density of solid
areas is too low.
2. Solid black areas
feel rough to the
touch.
3. Carrier is present
on the copy.
4. Fire-fly spots
appear on solid
black copies.
1. V is out of adjustment
SG
When V is lower than 2.5 V, the toner supply shifts to fixed supply
SG
mode.
2. The charge current is too high
If the charge current is increased in order to improve solid black
images, Vsp is decreased, lowering the image density.
3. The bias voltage is too low.
4. The lamp regulator output is too low.
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Cause