If ambient temperature and humidity are low, papers that are thicker than medium thickness can cause groups of white spots [A].
Cause
If the paper is cold, the electrical resistance will be high which can cause a discharge during image transfer.
Solution
Suppress the electrical discharge on paper, used for printing, by changing the paper thickness setting one step at a time according to the table below. This will prevent the electrical discharge issue in the transfer unit while maintaining optimum line speed and fusing.
However, if you change the setting from Thick 2 to Thick 3, you will not be able to do duplex printing, so if you are using duplex printing, make setting changes as shown in the table below.
| Printing Paper Thickness | |||||
|---|---|---|---|---|---|
| Medium | Thick 1 | Thick 2 (Simplex) | Thick 2 (Duplex) | Thick 3 | |
| Thickness setting | Normal 2 | Thick 2 | Thick 3 | Normal 2 (reduces transfer electrical current) | OHP |
| Silent mode | Not required | Not required | Not required | ON (line speed reduced) | Not required |
| SP mode changes | Not required | Not required | Not required | Change SP1-105-153, -203 to +10 (to match fusing temperature) | Not required |
| Comments | Change paper type in UP mode | Change paper type in UP mode | Change paper type in UP mode | Done by service technician only | Change paper type in UP mode |
These measures are intended to avoid problems, and we recommend that you return to the original settings if the operation environment changes according to the season.