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Service Guide ML520/521
Chapter 1 Product Specifications
1.6OPERATIONAL 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 |
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HSD | 10 | 427 | 90 | 72 | 42.7 |
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| 12 | 427 | 108 | 72 | 35.6 |
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| 15 | 427 | 135 | 72 | 28.5 |
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| 17.1 | 427 | 154 | 72 | 25.0 |
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| 20 | 427 | 180 | 72 | 21.4 |
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Utility | 10 | 320 | 120 | 72 | 32 |
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| 12 | 320 | 144 | 72 | 26.7 |
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| 15 | 320 | 180 | 72 | 21.3 |
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| 17.1 | 320 | 206 | 72 | 18.6 |
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| 20 | 320 | 240 | 72 | 16.0 |
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LQ | 10 | 80 | 240 | 144 | 16.0 |
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| 12 | 80 | 288 | 144 | 13.3 |
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| 15 | 80 | 360 | 144 | 13.3 |
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| 17.1 | 80 | 412 | 144 | 9.32 |
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| 20 | 80 | 480 | 144 | 8.0 |
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