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4-12
Troubleshooting: Diagnostic Tests
Roller Test
(Uneven darkness can appear if AC power is on during this test.)
After cueing, printing should start at approximately 13–14 mm on the page.
The pattern appears as diagonal light and dark wavy bands.
Isolated light spots indicate a flat spot on the roller and may indicate that
the print carriage assembly needs to be replaced.
A white line across the length of the page indicates a missing print head
dot.
Test Pattern II
A combination of Test Pattern I and Roller tests. The first three pages consist of a
series of triangular waveforms and various hashmarks. The fourth page is a partial
roller test.
Test Pattern II Continuous
Test Pattern II runs continuously until Stop is pressed.
Continuously Run Out Paper
This test is used in manufacturing to test how well the unit self-corrects tracking
problems.
MAC 5500 resting ECG analysis system
2020299-020
62A
Revision E
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