Oki 490 - Manual (Page 63)

Troubleshooting 63
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 4.