Epson TM-P20 Technical Reference Manual page 48

User NV memory capacity
 1 KB (initial setting)
 64 KB
 128 KB
 192 KB
NV graphics memory capacity
 None
 64 KB
 128 KB
 192 KB
 256 KB
 320 KB
 384 KB (initial setting)
Print density
Selectable from levels 1 to 13 (70%  130%) (initial setting: level 7)
Depending on the paper type, it is recommended to set the print density as shown in the table below for the best
print quality.
Original Paper Type
P35024, KT55F20, KT48F20, AF50KS-E
F5041(48), F5041(55)
P30023, P31023
 If the print density is set to a darker level, printing speed may be reduced.
 If the print density is set to a darker level, paper dust accumulates on the print head and print may
Print speed
Selectable from levels 1 to 10 (Slow  Fast) (initial setting: level 10)
Depending on print conditions, such as print duty, print head temperature, and data transmission
speed, print speed is automatically adjusted, which may cause white lines due to intermittent print
(the motor sometimes stops). To avoid this, keep the print speed constant by setting it lower.
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be faint. For information about how to clean the thermal head, see
80.
Density Level
7 (100%)
8 (105%)
12 (125%)
"Cleaning the Printer" on page