Toner Density Control - Ricoh G035 Service Manual

DEVELOPMENT

2.5.6 TONER DENSITY CONTROL

Overview
This machine uses sensor control mode to control toner supply.
Toner Density Control Flow Chart
K = K - 0.25
No
G035
Printing
Image pixel count
Vt(10) detection
Has the following
condition been detected
20 times?
Vtref < Vt(10)
Yes
No
Vtref + 0.1 < Vt(10)
or
K ≥ 1.5 ?
Yes
K = K - 0.5
Toner supply motor
turns on in reverse for
0.3 s.
GAIN determination
Image pixel count mode:
GAIN = 1
Toner supply motor on
time calculation
Have 10 or
more sheets printed
been made since the last
Vtref change and is the
Print job
finished?
2-28
No
Has the following
condition been detected 10
times?
Vtref-0.2 > Vt(10)
or Has the toner supply
motor been
turned on ?
Yes
K = K + 0.25
Vsp/Vsg detection
Yes
New Vtref determination
No
K not
changed
G035D540.WMF
SM