Oki 5520 alarm light utl and prop are on - OKI MICROLINE 5520 Matrix Printer

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

Soulvisitor

• 1113 Answers
• Posted on Jan 20, 2008

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

SOURCE: stops printing

Replace the space motor.

SOURCE: Hello!OKI MICROLINE 5520 NLQ and

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