Table of Contents
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31 December 1992
Mode No.
No.
Leading
Trailing
Margin
Margin
Indicator
Indicator
19
01
09
20
02
00
°
21
02
01
22
02
02
23
02
03
24
02
04
Function
Image Bias Adjustment
Adjust image bias output if the image
density at ID level 7 cannot be adjusted by
the light sensor adjustment. (VR102 on the
main board)
Vo is decided by the manual ID setting
(level 1~ 26) or the background image
density of the original in ADS mode.
ADS Level
Selects the image density level in ADS
mode.
Data 1(Lighter):
Increases development bias by –20 volts
Data 2 (Darker):
Decreases development bias by +20 volts.
ID Sensor Detection Interval
ID sensor check is performed every 1220
mm length of originals or 610 mm length of
originals.
If low image density occurs in the toner
near end condition, change the data to "1".
ID Sensor Grid Voltage Adjustment
Adjust the ID sensor grid voltage if the ID
sensor bias adjustment (SP#18) fails to
achieve.
Image Grid Voltage Adjustment
Adjusts the image grid voltage if the light
sensor adjustment (VR102) and image bias
adjustment (SP#19) fail to achieve.
PTL OFF Timing
Adjusts the PTL off timing for the trailing
edge of the copy paper.
If a blank image appears on the trailing
edge of the copy paper, change the data.
4-19
SERVICE TOOLS
Data
0: Normal (V
)
0
1: Darkest
(V
+ 40V)
0
2: Darker
(V
+ 20V)
0
3: Lighter
(V
– 20V)
0
4: Lightest
(V
– 40V)
0
0: Normal
1: Lighter
2: Darker
0: 1220 mm
originals
1: 610 mm
originals
0: –460V
1: –400V
2: –440V
3: –500V
4: –540V
5: –600V
6: –640V
0: –940V
1: –860V
2: –900V
3: –980V
4: –1020V
0: –15 mm (from
trailing edge of
the copy paper)
1: Not OFF
2: –30 mm
3: –25 mm
4: –20 mm
5: –10 mm
6: – 5 mm
7: ± 0 mm
8: + 5 mm
9: +10 mm
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