Question about OKI MICROLINE 520 Matrix Printer

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Oki 520/521 logic boards

Alarm light flashing,utility and prop light stays on.

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Re: oki 520/521 logic boards

Check if the Pico fuse is blown ? next to the heat sink on the transisitor array with the number 2025.if the fuse is gone than the fuse plus the 2025 transistor must be replaced.

Posted on Dec 31, 2007

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