Schiller AT-102, Service Handbook

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3.13
Article Number 2. 540 028
SCHILLER AG 2002
AT-102 Service Handbook
Section 3
Fault Finding
Thermal Printer Check
To check the printer and to ensure that every pixel is operational, a built-in printer test is
provided. Carry out the printer check from the ECG acquisition screen by pressing the FN
key followed by the MANUAL PRINT softkey:
+
A `wavy line` test printout is given. Other test patterns are available - toggle the test
patterns with the lead arrow keys.
Carefully examine the printout and ensure that all the lines are even and uninterrupted. Any
faulty print-head pixels will be seen as a horizontal white line. Examine the printout for
evenness of print
Faulty pixel shown as a
horizontal line on the test
printout. (exaggerated on
this example for clarity)
If a faulty pixel is detected the printer must be replaced. If the printout is uneven (for
example darker at the top than at the bottom), it indicates that the printer alignment is not
correct. If the printout is too faint or too dark, check the paper; old paper, paper that has
been exposed to light for a long period, or poor quality paper can all adversely effect the
print quality. A too light or too dark printout also indicates that the TPH temperature is
incorrect. Change the Printer.
NOTE:
The ' shelf life' of the printer paper is not indefinite. Old paper, paper that has
not been stored in a cool damp free environment, or paper that has been
exposed to excessive heat can adversely effect the quality of the print.