Product specifications

11 – 14
11.5.2 Sample Print Self-test
1) Start
Depress and hold the LF switch, while moving the power switch to the “on “ position.
2) Stop
Depress SEL switch.
The printer will finish printing current line before stopping and returning to its default state.
3) Print header
At the beginning of Self Test, the product description header will be printed as follows
aaaaa bbb E F/W ee.ff YR gggg-hhhh-ii
CG jj. kk
... as defined by ...
Position & Char. Count Description Data Printed Comments
aaaaa Model name ML3320 Narrow chassis
ML3321 Wide chassis
bbb Compatibility MIE ML/EPSON/IBM compatible
ee.ff Revision # 00.00-99.99 Firmware revision
gggg ROM Type 4110
hhhh Part Number 3049
ii Part Number 01-99 ROM-FD Number
jj.kk Revision # 00.00-99.99 CG revision
4) Test pattern
The test pattern is the consecutive printing of all ASCII characters (20H to 7EH) in all print
mode combinations with their corresponding pitches and is the same for all models.
HSD 10, 12, 17.1 CPI
UTL 10, 12, 17.1 CPI
NLQ 10, 12 CPI
NLQ 10 CPI DH/DW (Note 1)
• Number of Characters Printed per Line
CPI Narrow Wide
54040
10 80 80
12 96 96
17.1 137 137
(Note 1) Scalable font in case of the optional ROM.