HP 250C - Manual (Page 111)

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250C
330
350C
230
250C
330
350C
7Ć3 Calibrations and Adjustments C4699Ć90000
Service Modes
The possible states ofany LED are:
Flashing Can be On or Off ?
Off On
There are two service modes: Service Mode 1 contains tests that do not need carriageĆaxis
initialization; Service Mode 2 contains tests that do need carriageĆaxis initialization.
Entering Service Mode 1
1 Switch the plotter off.
2 While holding the following key down,
switch the plotter on:
Align Cartridges
Form Feed
3 Once the the LEDs begin to light up one
by one (as shown below), release the key.
or
or
The plotter performs the electrical powerĆon tests but does not
initialize the mechanics. The fan turns on and remains on.
All LEDs remain off for a few seconds.
Then, all LEDs begin to flash, waiting for you to perform a test
or calibration.
4 Place the Service Mode 1 frontĆpanel overlay over the keys on the plotter.
The overlayis supplied with this manual. The frontĆpanel keys in service mode are
described on page 7Ć5.