Philips Avalon FM20, Service Manual

Page: 98 / 260

7 Testing and Maintenance
98
Fetal Recorder Selftest Report
To verify your printer configuration, or if you doubt the performance of the recorder, you may want to
print a test report.
To print a selftest report, in Service Mode, select
Main Setup, Fetal Recorder, Selftest
.
Here is an excerpt from a sample test report to give you an idea what it looks like (the exact appearance
may vary slightly):
Check the test pattern to ensure all the heating elements on the printer head are operational. Ensure
that:
•
No more than 20 dots are missing over the entire printhead.
• No more than two adjacent dots are inoperative.
• No dots in the mode annotation (for example, FHR1) are inoperative.
1
Same data from the trace header
2 Self-test status
3
Print quality data
4
Recorder electrical data
5
Paper related data (paper count is the number of pages detected om this test).
6 Speed value is the tolerance for paper detection. If the Speed value is greater than 150, the
recorder most likely requires servicing (cleaning or exchanging of parts), assuming the correct
paper is being used. A paper value of 2984 is optimal. You may see small variants from this
number.
7
Expected value for PH Volt Min is 0. If the value is greater than 0 there may be a TLPH voltage
problem.
8
This line should print exactly on the 20 unit gridline (Toco baseline) if the recorder is correctly
calibrated.