Gestetner B147, Service Manual

Page: 312 / 1081

COPY SERVICE MODE
B147/B149/B190 5-24 SM
2-801 [PA Roller Current] Paper Attraction Roller Current
([Color], S implex or D uplex, Process Speed): Current Adjustment
( P aper or B y-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.
2-801-6 [FC] S 62.5 *BCU [ 0 to 50 / 1 / 1 µ
A/step ]
2-801-7 [FC] S 125 *BCU [ 0 to 50 / 1 / 1 µ
A/step ]
2-801-8 [FC] D 62.5 *BCU [ 0 to 50 / 5 / 1
µ
A/step ]
2-801-9 [FC] D 125 *BCU [ 0 to 50 / 10 / 1 µ
A/step ]
2-801-14 [K] B TH S *BCU [ 10 to 30 / 5 / 0.1/step ]
2-801-15 [FC] B TH S *BCU [ 10 to 30 / 1 / 0.1/step ]
2-801-16 [K] B OHP *BCU [ 10 to 30 / 5 / 0.1/step ]
2-801-17 [FC] B OHP *BCU [ 10 to 30 / 1 / 0.1/step ]
2-801-18 [K] B TH D *BCU [ 10 to 30 / 5 / 0.1/step ]
2-801-19 [FC] B TH D *BCU [ 10 to 30 / 1 / 0.1/step ]
2-801-20 [K] SP S *BCU [ 10 to 30 / 8 / 0.1/step ]
2-801-21 [K] SP D *BCU [ 10 to 30 / 12 / 0.1/step ]
2-801-22 [FC] SP S 62.5 *BCU [ 10 to 30 / 1 / 0.1/step ]
2-801-23 [FC] SP S 125 *BCU [ 10 to 30 / 1 / 0.1/step ]
2-801-24 [FC] SP D 62.5 *BCU [ 10 to 30 / 1 / 0.1/step ]
2-801-25 [FC] SP D 125 *BCU [ 10 to 30 / 1 / 0.1/step ]
[PA Current Paper Size] Paper Attraction Roller Current - Paper Size Correction
Paper Type -> N: Normal, TH: Thick, OHP
2-802
Adjusts the correction, depending on the paper size.
When small-width paper is used for printing, the paper attraction roller current flows to
the non-image areas of OPC drum where the transfer belt touches the drum. This
may cause paper misfeed due to insufficient current.
To increase the current by 1.5 times, set the SP mode to “1.5.”
NOTE: Adjust only when a paper misfeed occurs with a small paper size. Increasing
the current too much may cause image offset in magenta halftone areas.
2-802-1 N LT SEF *BCU [ 1.0 to 4.0 / 1.5 / 0.1/step ]
2-802-2 N A5 SEF *BCU [ 1.0 to 4.0 / 2.0 / 0.1/step ]
2-802-3 TH LT SEF *BCU [ 1.0 to 4.0 / 1.5 / 0.1/step ]
2-802-4 TH A5 SEF *BCU [ 1.0 to 4.0 / 2.0 / 0.1/step ]
2-802-5 OHP LT SEF *BCU [ 1.0 to 4.0 / 2.4 / 0.1/step ]
2-802-6 OHP A5 SEF *BCU [ 1.0 to 4.0 / 4.0 / 0.1/step ]