1. General Adjustments – Copying, Printing and
(3) 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 increase the density of the image.)
•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 obtain the highest density of the image.
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| Black |
| Front |
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| Plain |
| Back |
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| 2 to 8 | 0 to 10 | 5 |
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| paper | Full color |
| Front |
| 2 |
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| Back |
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| Black |
| Front |
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| Thick 1 |
| Back |
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| 2 to 8 | 0 to 10 |
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| Full color |
| Front |
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| Back |
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| Thick 2 | Black |
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| 2 to 8 | 0 to 10 |
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| Thick 3 | Black |
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| OHP | Black |
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| 2 to 8 | 0 to 10 |
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| 1 |
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*"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 in the same manner as in procedure (2).
<Hint> The transfer voltage increases as the set value is increased. It is usually recommended that the set value be increased, when printing on thick paper or paper with asperities on its surface. On the other hand, the set value should be decreased, when printing on thin paper.
After adjusting the density, print and check the image quality.
If further image quality adjustments are still necessary, use the next procedure.
1.1
