Service manual

PRINTER ENGINE SERVICE MODE 30 July, 2001
5-20
2
Mode No.
(Class 1, 2, and 3)
Function / [ Setting ]
[Cur.Paper Size] Transfer Current - Paper Size Correction
Paper Type -> N: Normal, TH: Thick, OHP
Corrects the transfer current for paper size.
When small paper is used for printing, the transfer current flows to the drum at the non
image areas where the transfer belt touches the OPC drum. This may cause an abnormal
image due to insufficient current at the image areas.
To increase the current by 1.5 times, set the SP mode to “15”.
NOTE: Increase only when an abnormal image (insufficient image transfer) occurs on a
small paper size. However, increasing the current too much may cause image
offset.
5 N LT SEF [ 10 to 40 / 16 / 0.1/step ]
6 N Post Card [ 10 to 40 / 22 / 0.1/step ]
7 TH LT SEF [ 10 to 40 / 12 / 0.1/step ]
8 TH Post Card [ 10 to 40 / 30 / 0.1/step ]
9 OHP LT SEF [ 10 to 40 / 22 / 0.1/step ]
309
10 OHP Post Card * [ 10 to 40 / 40 / 0.1/step ]
[PA Roller Cur.] Paper Attraction Roller Current
([Color], Simplex or Duplex, Process Speed): Current Adjustment
(Paper or By-pass): Paper Size Correction
Adjusts the paper attraction roller current for color printing.
If paper misfeeds occur at the transfer unit in color mode, check and/or adjust the paper
attraction roller current.
NOTE: The magenta development section is close to the paper attraction roller.
Decreasing the current may not cause paper misfeed.
If the current is increased too much, the following image problems may occur depending
on the humidity.
High humidity:
Insufficient image transfer in magenta due to current flow to the magenta OPC drum
Low humidity:
Offset image in magenta halftone areas due to paper charged positive too much
When adjusting the current with this SP mode, the value should be lower than transfer
current.
6 [FC] S 62.5 *
[ 0 to 50 / 5 / 1 µA/step ]
7 [FC] S 125 *
[ 0 to 50 / 10 / 1 µA/step ]
8 [FC] D 62.5 *
[ 0 to 50 / 2 / 1 µA/step ]
9[FC] D 125 *
[ 0 to 50 / 5 / 1 µA/step ]
14 [K] B TH S * [ 10 to 30 / 5 / 0.1/step ]
15 [FC] B TH S * [ 10 to 30 / 0 / 0.1/step ]
16 [K] B OHP * [ 10 to 30 / 10 / 0.1/step ]
17 [FC] B OHP * [ 10 to 30 / 16 / 0.1/step ]
18 [K] B TH D * [ 10 to 30 / 5 / 0.1/step ]
19 [FC] B TH D * [ 10 to 30 / 0 / 0.1/step ]
20 [K] SP S * [ 10 to 30 / 5 / 0.1/step ]
21 [K] SP D * [ 10 to 30 / 5 / 0.1/step ]
22 [FC] SP S 62.5 * [ 10 to 30 / 5 / 0.1/step ]
23 [FC] SP S 125 * [ 10 to 30 / 10 / 0.1/step ]
24 [FC] SP D 62.5 * [ 10 to 30 / 2 / 0.1/step ]
801
25 [FC] SP D 125 * [ 10 to 30 / 5 / 0.1/step ]