Oki ML5521 User Manual page 66

Problem
There are dots missing in my printouts.
Solution
The head gap may not be set correctly. Try moving the headgap lever
to a lower setting. If that doesn't help, the printhead may be
damaged; call for service.
Problem
The ALARM light is flashing.
Solution
Try turning the printer OFF and then back ON again. If the light still
blinks, call for service.
Problem
The ALARM light is ON and the Character Pitch 10 light is flashing.
Solution
This indicates that the paper lever is set at the wrong position for the
paper you are trying to use. Move it to the proper setting.
Problem
The ALARM light is ON and the Character Pitch 15 light is flashing.
Solution
This indicates a paper jam. Press the SEL key and correct the paper
jam situation. See "Clearing Paper Jams," in Chapter 3.
Problem
The printer needs paper. The ALARM is not ON and I can't load paper.
Solution
1. Press and release the SEL key.
2. Press and hold the SHIFT key and press the RESET /
CHARACTER PITCH key.
The ALARM light illuminates and you can now load paper.
TROUBLESHOOTING > 66