Troubleshooting Troubleshooting Cardiograph Issues
3-8 PageWriter TC 70 Cardiograph Service Manual
Table 3-3 Signal Acquisition Issues
Symptom Possible Cause &
Investigation Step
Solution
All leads show leads
off (red dashed line)
continuously
PIM communications
have been lost due to
USB patient data cable
connection failure, or
defective leads are
connected to the PIM.
1 Check to see if the PIM icon (with the red X)
appears at the top right of the screen.
2 If the PIM is firmly attached, perform the PIM test
as described in “Patient Interface Module (PIM)
Test” on page 3-43. If the PIM Test fails, replace
the patient data cable. If the PIM Test continues to
fail with a new patient data cable attached, replace
the PIM.
3 If the PIM test passes, ensure that all lead wires are
fully seated in the PIM lead connectors.
4 Ensure that all lead wires are intact and that there
are no cracks visible in any of the lead wires.
5 Run the lead wire open and short tests, as
described on page 3-35.
6 If the lead wire open and short tests fail, contact
the Philips Response Center.
One or more leads
show leads off (red
dashed line)
periodically
Improper or incomplete
patient and skin
preparation techniques
Ensure that good patient preparation and skin
preparation techniques have been followed as
described on page 3-7.
Improperly attached
electrodes or lead wires;
expired disposable gel
electrodes
1 Ensure that the lead adapters are clean and have a
tight fit.
2 Ensure that the electrodes are within their shelf life
and are firmly attached to the patient.
Defib or high noise
event
Observe frequency and recovery behavior.
The PIM performs an automatic ranging action when
input signals vary significantly. If this behavior persists
in the absence of electrode movement or defib events,
the cardiograph should be serviced to inspect and
possibly replace the PIM or lead cables. Contact the
Philips Response Center.
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