Service manual

Troubleshooting Tables
4-10
Message: Printer door open or
the current LED is flash-
ing.
Door is ajar.
A printer cable is not fully seated.
Printhead contact switch clip or leaf
spring touching contact post.
Defective sensor assembly.
Defective door-detect circuit.
Close door.
Reseat connectors J303 through J306.
Check leaf spring behind printhead and
contact post.
Replace sensor assembly.
Replace CPU assembly.
Wavy diagonal lines on printer self-test or
distortion of printouts in the time axis.
Improper meshing of gears in printer
drive assembly or door assembly.
Replace printer drive assembly or door
assembly.
Make sure the printer drive assembly is
properly mounted on the top cover.
Printing is dark on one side of page but faint
on the other side.
Printhead is not free to float and pro-
vide even (uniform) pressure distribu-
tion across platen roller.
Make sure there is slack in the printhead
cables.
Replace printer door.
Replace printhead assembly.
Paper moves but nothing prints. Paper loaded incorrectly, or non-
approved or non-thermal paper
installed.
A printer cable is not fully seated.
VPRINT supply defective.
Insufficient leaf spring tension or
printhead out of position.
Defective printhead or printhead
cables.
Defective component in printer cir-
cuitry.
Make sure cardiograph is properly loaded
with approved thermal paper.
Reseat connectors J303 through J306.
Test VPRINT. If defective, replace power
supply.
Check leaf spring for printhead platen
pressure, door latch.
Replace printhead assembly or printhead
cables.
Replace CPU assembly.
Paper moves but printing is faint. Door improperly latched.
Paper loaded incorrectly, or non-
approved or non-thermal paper
installed.
A printer cable is not fully seated.
VPRINT supply defective.
Insufficient leaf spring tension or
printhead out of position.
Defective printhead or printhead
cables.
Defective component in printer cir-
cuitry.
Capacitor assembly defective.
Close door properly.
Make sure cardiograph is properly loaded
with approved thermal paper.
Reseat connectors J302 through J306, and
connectors on the capacitor board
Test VPRINT. If defective, replace power
supply.
Check leaf spring for printhead platen
pressure, door latch.
Replace printhead assembly.
Replace CPU assembly.
Replace capacitor assembly.
Table 4-5 Printer
Symptom Possible Cause Corrective Action
Chart Speed