Ricoh FT5034, Service Manual

Page: 135 / 139

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