Question about OKI MICROLINE 520 Matrix Printer

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Oki 420 alarm light utility prop on - OKI MICROLINE 520 Matrix Printer

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3 Suggested Answers

Desmond Pillay

  • 40 Answers

SOURCE: 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.
Dezzi

Posted on Dec 31, 2007

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Soulvisitor

Soulvisitor

  • 1113 Answers

SOURCE: oki 520/521

Cover on these are often broken causing the two little switch's to not close on left and right of lid

Posted on Jan 20, 2008

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kapi85

  • 1 Answer

SOURCE: Hello!OKI MICROLINE 5520 NLQ and

Hi, I have the same problem, my solution is: change the cooler in bottom of the printer.

Posted on Apr 28, 2011

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1 Answer

Printer Throws Alarm, HSD, Prop error and Head Problems


Most likely, you need to lubricate the shaft the head moves on and clean the positioning tape (carefully, the marks on it can be dissolved).
Unplug the printer while it's moving the head, so you can manually move the head around. Use light oil, such as used in sewing machines.

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Machine stopped - alarm light flashing


just saw this yesterday. remove the top rear paper guide. on the left side between the tractor feed and the input slot for the paper, there is a sensor flag that pivots. check for paper scrap caught under the flag. it prevents the flag movement, causes a paper out alarm.

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As the alarm is on and steady then you most probably knocked the change lever into a position where it detects no paper loaded. The easiest way to check is to load your paper and move the change lever until the error lamp goes out!

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1 Answer

Alarm light flashing


Hi,
Is the front cover on the printer(ifs its not the alarm light will keep flashing as there is a sensor that will trigger the alarm if the cover is not on or not on properly.Hope this helps?
Dezzi

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1 Answer

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When the alarm light is blinking what other lights are on. This is the fatal error code with the printer.

Remove the ribbon. if still not moving smoothly unit needs service. 3 year warranty on this unit brand new.
If you cannot move the carriage back and fourth accross,

there is a seriuois issue. unit requires service.

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1 Answer

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What driver are you using ? the default driver should be IBM Proprinter.
Hope this helps
Dezzi

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1 Answer

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.
Dezzi

Nov 22, 2007 | OKI MICROLINE 520 Matrix Printer

1 Answer

Oki 520/521


Cover on these are often broken causing the two little switch's to not close on left and right of lid

Nov 22, 2007 | OKI MICROLINE 520 Matrix Printer

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