GE MAC 5000, Service Manual

Page: 112 / 176

5-10 MAC
™
5000 resting ECG analysis system Revision B
2024917-010
Troubleshooting: Diagnostic Tests
Writer Tests
Run the writer tests to check the motor speed control, paper speed, paper
tracking, paper cueing, and print head quality. During the tests, make
the following general checks.
„
The first character printed should not be distorted. This checks start-
up speed.
„
The writer should not skew or crush either edge of the paper.
„
The large triangles and diagonal lines printed across the pages
should be straight and uniform, without curves or wavering.
„
The perforations should align with the tear bar on the door after
cueing.
„
Paper travel should be smooth.
C-Scan Tests 1, 2, & 3
These tests are combinations of test pattern I and the roller test. They
are used by the writer vendor.
50 mm/s Test Pattern I, 25 mm/s Test Pattern I, and
5 mm/s Test Pattern I
These test patterns check the motor speed control and the paper speed.
Verify that the length of the printout from start to finish is 250 mm ±
5 mm. Use the grids located on the top and bottom of the page for
reference. Do this for each of the three tests.
61A