Apple ColorLaserWriter 12/600PS - Manual (Page 344)

Normal power-on status panel behavior
Every time you turn on the printer, the lights on the status panel reflect the
results of diagnostic tests the printer performs on itself. When everything’s
normal, the four main lights are on at first. Then they go out, one by one, left
to right.
As soon as they all go out, the printer has passed the tests. The green
Ready/In Use light (
U) blinks for about two minutes during warmup, and
then it should glow steadily.
If the status lights do not behave this way, the printer needs attention. The
rest of this appendix explains what different lights tell you about the
condition of the printer.
M
!
C
Y Bk
First, the
Ready/In use light
(
U ) goes out.
Second, the Alert light
(
±
) goes out.
Third, the Paper Out light
( ) goes out.
Finally, the
Paper Jam light
(
‘ ) goes out.
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324 Appendix G