What You Should See And Hear - HP DesignJet 250C Service Manual

What You Should See and Hear

The sequence given below is what should happen when you turn on the plotter in normal
operating mode.
C A U T I O N
The possible states of any LED are:
1 All front panel LEDs flash together twice; the second flash is very short.
2 If a firmware ROM SIMM is installed in the plotter, the following will occur:
230
The LEDs light up one by one as follows, until eight LEDs are on. This happens three
250C
times.
330
The LEDs light up one by one as follows, until all nine LEDs are on. This happens
350C
several times throughout the initialization procedure.
C4699 90000
To observe movement of internal mechanisms, you can keep the cover
switch pressed, while the cover is open. However, in doing so, do not
block the path of the cartridge carriage with anything you stick into
the cover switch area.
Off
Flashing
On
Can be On or Off
?
Troubleshooting 8 3