GE MAC 2000, Service Manual

Page: 54 / 184

Service Setup
If one cycle of the square wave spans 12.5 mm on paper, measured from
corner to corner of the wave, with an allowable tolerance of 0.5 ±1.25 mm
(10%), the test passes.
If this criteria is not met, the test fails.
• 5mm/s Speed Test
Measure five or more cycles and divide your measurement by the number
of cycles measured. If one cycle of the square wave spans 5 mm on paper,
measured from corner to corner of the wave, with an allowable tolerance of
0.25 ±0.5 mm (10%), the test passes.
If this criteria is not met, the test fails.
5. Perform the Print Head Test .
a. Select Print Head Test .
The writer prints a 1–page print head test report.
b. Verify that there are no gaps in any of the lines printed.
Up to 5 mm of blank paper is allowable at the top and bottom of the page.
When the page is done printing, the following window opens:
• If there are no gaps in the lines on the printed report, press Yes .
• If there are gaps in the lines on the printed report, press No .
6. When all writer tests are completed, press Cancel to close the window.
7. If one or more of the writer tests fail, use the following table to determine how to
proceed.
Steps for Writer Test Failure
Observed Failure Remedy
Improper paper queuing or
Paper Jam message Faulty paper sensor
Replace the paper sensor.
See “Paper Sensor” on page 97 .
Missing dots (gaps in printed
report) Faulty printhead.
1. Clean the printhead.
See “Cleaning the Printhead” on page 99 .
2. Replace the printhead.
Refer to
“Replacing the Printhead” on page
102 .
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MAC™ 2000 ECG Analysis System
2053535-003C