Toshiba e-STUDIO556 Service Manual page 466

6.13 Transfer bias ON timing adjustment (e-STUIDIO557/657/757/
857)
The process-related section has been set taking the transfer and paper separation abilities into
consideration. This is to allow the characteristics of the paper to be demonstrated in a well-balanced
manner when TOSHIBA-recommended paper is used.
However, an image failure may occur due to drum separation finger staining, depending on the
environment under which the equipment is used or the media type of the paper. It can be avoided by
setting the value for the setting code to "08-2960" so that the transfer bias ON timing is slow.
[Setting code 08-2960: Transfer timing correction] for e-STUDIO557/657/757/857
Value
e-STUDIO557/657
6 Approx. 5.4 mm slower than the
standard ON timing
7 Approx. 4.1 mm slower than the
standard ON timing
8 Approx. 2.7 mm slower than the
standard ON timing.
0 Approx. 1.4 mm slower than the
standard ON timing.
1 Same as the standard ON
timing.
(Default value)
2 Approx. 1.4 mm faster than the
standard ON timing.
3 Approx. 2.7 mm faster than the
standard ON timing.
4 Approx. 4.4 mm faster than the
standard ON timing.
5 Approx. 5.8 mm faster than the
standard ON timing.
Notes:
1. To reduce drum separation finger staining, use the setting code 08-2960 to set the value so
that the ON timing becomes slow, and then check the result. (The paper separation ability
from the photoconductive drum shows the tendency shown in the above table.)
2. As shown in the above table, the transfer ability for the paper leading edge and the paper
separation ability from the photoconductor are inversely related. Therefore, if the transfer bias
ON timing is set to be too slow, depending on the environment under which the equipment is
used or the media type of the paper, the transfer ability for the paper leading edge may
slightly decrease. So, when adjusting the value, be sure to check the paper feeding ability as
well as the image quality.
3. Be careful when setting the values because the setting value is not proportional to the ON
timing value (mm).
Remark:
e-STUDIO657/857 has been improved since the previous models in order to avoid paper exit
jamming (E010) and image failure caused by drum separation finger staining. However, drum
separation finger staining may occur depending on the environment under which the equipment
is used or the media type of the paper. This can be reduced by the above settings.
e-STUDIO556/656/756/856/557/657/757/857
ADJUSTMENT
Content
e-STUDIO757/857
Approx. 8.2 mm slower than the
standard ON timing
Approx. 6.6 mm slower than the
standard ON timing.
Approx. 4.9 mm slower than the
standard ON timing.
Approx. 3.3 mm slower than the
standard ON timing.
Approx. 1.6 mm slower than the
standard ON timing.
Same as the standard ON
timing.
(Default value)
Approx. 1.6 mm faster than the
standard ON timing.
Approx. 3.3 mm faster than the
standard ON timing.
Approx. 4.9 mm faster than the
standard ON timing.
© 2011 - 2014 TOSHIBA TEC CORPORATION All rights reserved
6 - 62
Paper
Transfer separation
ability for ability from the
paper leading photo-
edge conductive
drum
| Separation
| ability improves

|
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |

|
Transfer ability |
improves |