Epson TM-L90-i Technical Reference Manual page 99

 Usually, the number of head energizing parts does not need to be changed.
 The maximum printing speed is enabled only when a single power split is selected.
 If a quarter power split is set, current consumption can be suppressed.
Setting the print density
Level
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7 (initial setting)
Level 8
Level 9
Level 10
Level 11
Level 12
Level 13
Level 14
Level 15
The higher the print density is set, the lower the printing speed is likely to fall.
Guide
70%
75%
80%
85%
90%
95%
100%
105%
110%
115%
120%
125%
130%
135%
140%
Chapter 2 Setup
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