Welch Allyn 5002 Series, Service Manual

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109
To reinstall button head screw’s, apply some removable Loctite 220 to
each screw. Avoid over tightening the screws. Turn screw all the way
down and then turn screw back 1/4 turn.
Bad Load Cell Removing the top plate, the load cells will be visible.
Enter into “Service Mode”
Display A/D Readings
Note: A/D reading without a load. Look for a low stable weight reading
less than 10 lbs and that it is not drifting or unstable.
Unplug each load cell and connect one at a time to see if your display
becomes unstable. This will tell you which load cell needs to be
replaced.
------------- A/D Readings are
unstable
Removing the top plate, the load cells will be visible.
Enter into “Service Mode”
Display A/D Readings
Note: A/D reading without a load. Look for a low stable weight reading
less than 10 lbs and that is not drifting or unstable.
Unplug each load cell and connect one at a time to see if your display
becomes unstable. This will tell you which load cell needs to be
replaced.
Load
Cell/Calibration
(OHM out Load Cells) See Calibration procedure this
service manual
.
Paper Jam Paper being torn
off incorrectly
Must lift paper straight down or up at a slight angle, and do not pull out
or to left or right side of paper slot (opening in door for paper).
Not printing,
Paper not coming
out of printer
Too much paper
is curled up inside
on roller
Remove paper from roller and redress paper in roller of printer
mechanism.
Installation of
thermal paper
Paper may be installed upside down. Thermal paper is critical to the
operation and needs to have the chemical treated side of paper facing
print head.
Pink strip on
paper
Almost out of
paper
Time to change the thermal paper.