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e-STUDIO281c/351c/451c
1.2.1 To Adjust the Blurred or Grained Image
(1) Enter adjustment mode [05]. Change the values for codes [234/236/237/238/239] to adjust the transfer (2nd
transfer) roller bias output.
(Adjust the offset voltage of transfer roller bias so as to optimize the halftones.)
• The code to use varies, according to a type of paper used. Adjust the value for the [05] code corresponding
to the paper type for which you would like to improve the image quality. Set the value within a range of
"2" to "8" to optimize the halftones.
Paper type [05] code Subcode
Value
recommended
Acceptable
value range
Default
Front 0
Black
Back 1
Front 2
Plain
paper
Full color
Back
05-234
3
2 to 8 0 to 10 5
Front 0
Black
Back 1
Front 2
Thick 1
Full color
Back
05-236
3
2 to 8 0 to 10 5
Black 0
Thick 2
Full color
05-237
1
2 to 8 0 to 10 5
Black 0
Thick 3
Full color
05-238
1
2 to 8 0 to 10 5
Black 0
OHP
Full color
05-239
1
2 to 8 0 to 10 5
* "Front" refers to the printed side in simplex mode or the side that is delivered facing upwards in duplex mode.
"Back" refers to the printed side that is delivered facing downwards in duplex mode.
* The table below shows you the acceptable paper weight for the paper types.
Paper type Acceptable paper weight
Plain paper 64 to 80 g/m² 17 to 20 lb. Bond
Thick 1 81 to 105 g/m² Max. 28 lb. Bond
Thick 2 106 to 163 g/m² Max. 43 lb. Bond / 90 lb. Index
Thick 3 164 to 209 g/m² Max. 55 lb. Bond / 110 lb. Index
• After adjusting the transfer roller bias output, perform the automatic calibration.
* For further information regarding the procedures, refer to procedure (2) in 1.1 To Obtain a Darker Image.
<Hint> The transfer voltage increases as the set value is increased. It is usually desirable that the set
value be decreased to obtain a clearly highlighted area.
After performing the adjustment, print and check the image quality.
If further image quality adjustments are still necessary, use the next procedure.
1. General Adjustments – Copying, Printing and e-Filing (Output from Box)
1.2