HP C2858A, Руководство по обслуживанию

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8-11
Troubleshooting
DISPLAY DATA PLOT
Display data is a plot feature, located under the “Utilities Menu’, that allows you to plot the
first and last 1000 bytes of graphic instructions of a plot file sent. This feature can be used to
ensure proper data reception. The instructions will be plotted in ASCII. format.
To use the Display Data feature, do the following:
1. Remove any media from the plotter and make sure the plot queue is empty.
2. Enter the “Utilities” menu and select “Display Data”. A front panel message will
instruct you to send the plot file to the plotter.
3. When the plot file has been completely sent, press the front panel Enter button.
4. Load a sheet of A or A4 size media (portrait orientation). The first 1000 bytes of the
plot file will be plotted.
5. Remove the sheet and load another sheet of A or A4 size media. The last 1000 bytes
of the plot file will be plotted.
SERVO CONTROL SYSTEM FAILURES
All 0300XX error codes indicate a failure of the hardware or associated electronics of the
X-axis (Paper axis) or the Y-axis (Carriage axis) servo control system.
An X-axis shutdown may cause either a system error code or the worded display “Power Off
Check media path”. For the X-axis shutdown, first check for binding in the X-axis mechanics
due to a paper jam. Also check to see if the supply roll is out of media. Tape which secures the
media to the roll may cause a jam as it is pulled through the drive roller system. Removing the
two screws which attach the worm gear to the drive roller should allow the drive roller to be
manually spun. If it does not, it is probably jammed. Other areas to check would be the X-axis
motor encoder, interconnect PCA, and main PCA. Use the X-axis motor encoder and X-axis
motion control tests, found in the service menu, to help troubleshoot.
A Y-axis shutdown may cause either a system error code or the worded display “Power Off
Check pen path”. For a Y-axis shutdown, first check for binding in the Y-axis mechanics.
Binding may be caused by a paper jam. When the plotter is switched OFF, the carriage can be
manually moved along the Y-axis. Check for any areas where the carriage may be binding.
Also check the reduction pulley, small drive belt, small belt tensioner, main belt, main idler,
and carriage bushings. In addition to mechanical binding, a problem in the servo feedback
and motor drive systems should also be checked. Check the encoder strip, interconnect PCA,
main PCA, and carriage. Use the Y-friction, Y-encoder, Edge detect, and Cutter tests, found
in the service menu to help troubleshoot. Excessive Y-axis friction can be caused by binding
in the Y-axis or in the cutter. Use the Y-friction test, found in the service menu, to determine it
the problem is caused by the cutter.