Ricoh FT8680 Service Manual page 68

DEVELOPMENT
4) Manual ID Selection Position Compensation (V
120
60
0
–60
–120
–180
According to the manual ID selection position, the bias is compensated as
follows:
V = 60 x M – 240 (When M = 1 to 6)
BM
60 x M – 360 (When M = 7)
NOTE: M = Manual ID selection position. M ranges from 1 (darkest) to 7
(lightest).
When manual ID is set to 7 (lightest), the charge corona output is
lowered by 10% PWM duty cycle.
5) SP Mode ID Selection Compensation (V
In the SP mode, the image density level in the ADS mode can be selected
from four steps. The V
Selected level
L
N
H
VH
is determined by the SP setting as follows:
BS
V (V)
BS
+60
0 (Default)
–60
–120
2-44
)
BM
A171D532.wmf
)
BS
31 July 1995
ID Selection