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Service Guide ML520/521
Chapter 1 Product Specifications
1.6 OPERATIONAL SPECIFICATIONS
1.6.01 Character Matrix Sizes
Table of Print Speed and Character Matrix
Mode
Near Letter Quality
Utility
High Speed Draft
Speed
80 (12cpi)
320 (12cpi)
427 (12cpi)
Matrix (H x V)
17 x 13
9 x 7
7 x 7
Print Speed at Different CPI for the ML 520/521
Mode
CPI
CPS
Horiz. DPI
Vert. DPI
IPS
HSD
10
427
90
72
42.7
12
427
108
72
35.6
15
427
135
72
28.5
17.1
427
154
72
25.0
20
427
180
72
21.4
Utility
10
320
120
72
32
12
320
144
72
26.7
15
320
180
72
21.3
17.1
320
206
72
18.6
20
320
240
72
16.0
LQ
10
80
240
144
16.0
12
80
288
144
13.3
15
80
360
144
13.3
17.1
80
412
144
9.32
20
80
480
144
8.0
1.6.02 Characters Per Line
Microline 520
