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Checking the indicator lights 290, Checking the indicator lights – Apple LaserWriter 12/640 PS User Manual

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Checking the indicator lights

The lights on the front panel of the LaserWriter 12/640 PS indicate the
printer’s operating status.

Light

On

Off

Flashing

Ready/In Use

Printer is ready

Printer cannot print

Printer is warming up,

to use.

because of an error,

printing a startup

or the cover is open,

page, or processing

or the printer is

data for the next

turned off.

print job.

Paper Out

Paper cassette

Paper supply is OK.

Printer is ready for

is empty.

sheet of manual-feed
paper.

Paper Jam

There is a paper

Paper is OK

Toner cartridge is.

jam.

not installed.

If the Paper Out and Paper Jam lights flash alternately, or all three lights stay
on, the printer requires service. If you have just installed additional memory
(RAM) in the printer, there may be a problem with the memory. Open the
printer and make sure the SIMMs are fully seated in the correct sockets that
match one of the supported configurations listed in Chapter 5 and in
Appendix D.

290

Chapter 12