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Troubleshooting
Troubleshooting Chart
This troubleshooting chart includes system faults and equipment alerts related to possible
internal failures. If other error codes appear, refer to the directions for use for information
on the cause and suggested remedy for those errors.
Caution
Replace parts, components, or accessories only with parts supplied or
approved by Welch Allyn. The use of any other parts can lead to inferior monitor
performance and will void the product warranty.
Symptom
Possible Cause
Possible Corrective Action
Keyboard buttons
stuck or locked up.
Monitor menu lock function is engaged.
Refer to
Micropaq Monitor Directions for Use
.
Bad keyboard connection to the main
board at connector J3.
Check the keyboard flex cable connection at J3:
unlock the ZIF connector, reseat the flex cable, and
then relock the connector.
Keyboard flex cable is shorting out to the
metalized subframe (older versions of the
monitor only) near connector J3.
Add Kapton tape between the flex cable and the
metalized subframe close to connector J3.
Keyboard flex cable is damaged. Check
for sharp bends in the keyboard flex
cable.
Replace the front case assembly.
Defective keyboard.
Replace the front case assembly.
Display intermittent.
Battery not secured against the monitor.
Reinsert the battery. If this does not correct the
problem, check the back case for damage to the
plastic or to the battery connector.
Bad display connection to the main board
at connector J4.
Check the display flex cable connection at J4: unlock
the ZIF connector, reseat the flex cable, and then
relock the connector.
Display flex cable is damaged. Check for
sharp bends in the display flex cable.
Check for damage at the connection
between the flex cable and the display.
Replace the display assembly.
Defective or damaged display.
Replace the display assembly.
Lines in the display.
Check for display circuit damage caused
by improper display installation. Solder
connections on the ECG or SpO
2
connectors may damage the display
circuit.
Replace the display assembly.
