Schiller AT-1 - Printer Check

SCHLLER AT-I 3-Cmi ECG Unit
SERVICE HANDBOOK Issue 3 September 1999
Chapter 3
Fault Diagnosrr and Check Procedures
Printer Check
To check the printer and to ensure that every pixel is operational, a built-in printer test is provided.
To carry out the printer check press:
ALT - -MAP4 START
A test printout is given. Four test patterns are avivslliable - toggle between the test patterns with the
lead arrow keys A up or down.
Carefully examine the printout and ensure chat all the lines are even and unintempted. Any faulty
print-head pixels will be seen
as a horizontal white line. Examine the printout for evenness of print
Ifafaultypixelis detectedtheprintermust bereplaced. Iftheprintout isuneven (forexampledarker
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 suobe adjustment:Also check the paper: old paper, paperthat has
been exposed to light for a long period, or poor quality paper can all adversely effect the print
IMPORTANT:
quality.
THE 'SHELF LIFE' OF TIE PFUNTER PAPER IS NOT
INDEFLNlTE. OLD PAPER, PA4PER THAT HAS NOT BEEN
STORED IN A COOL DAMP FREE ENVIRONMENT, OR PAPER
THAT HAS BEEN EXPOSED TO LYCESSIVE HEAT CAN
ADVERSELY
EFFECT THE QUALITY OF THE PRINT
Print Head Alignment and Print Head Tension
The print head tension (the pressure that the print head exerts on the printer paper) is achieved with
two spring exerting pressure on the print head: the print head tension cannot be adjusted. Similarly
print head alignment is fxed and cannot be adjusted. If the print head tension or print head
alignment is not correct change the paper uay and printer assembly.
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