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15 July 1996
4.4.4 ID Sensor Pattern Bias
Potential
Sensor Detection
V
P
ID Sensor
Bias Level
4.0 V
ID Sensor
Output
While developing the ID sensor pattern, ID sensor bias is applied. ID sensor
bias is determined during process control initial setting as follows:
A charge is applied while grid voltage is –700 V to create the ID sensor
pattern.
The drum potential (V
The ID sensor bias (V
V
= V
– (–300)
IDB
P
= V
+ 300 (V)
P
V
P
–300
V
SG
V
SP
A176D564.wmf
) of the ID sensor pattern is checked.
P
) is adjusted so that it satisfies the following formula:
IDB
V
= V
+300 (V)
IDB
P
2-53
DEVELOPMENT
–700 V
A172D565.wmf
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