Question about OKI MICROLINE 520 Matrix Printer

Oki 520 missing print

Hi, the problem I have with my printer is that when it prints it never never prints the top line of dots, so when I print something off it never prints the top of the letters. ie.. if it was to print the letter T it would look or like an I. I have replaced the print head and ribbon, any ideas what might be causing this.

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You have replaced the item which is commonly the cause- the printhead. The other possible problems are: a connection break in the printhead ribbon cable, which makes electrical connection from the driver circuitry to the printhead. Look for a tiny crack, especially along the edge of this ribbon cable. Another possibility is an electronic component defect in the circuitry which fires the printhead, or maybe a loose solder connection in the same circuit. Lastly, when you replaced the printhead, are you reasonably certain the replacement head didn't have a broken top pin or two?

Posted on Apr 10, 2007

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