Philips Heartstart XLT, Руководство по обслуживанию

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M3500B/M5500B Service Manual 3 - 19
Operational Problems
3
Operational Problems
These tables describe problems that may arise while using the M3500B/
M5500B.
ECG Monitoring
The following table covers problems that might arise while monitoring ECG.
Table 3-7 Operational Problems - ECG Monitoring (Pads or Leads)
Symptom Possible Cause Suggested Solution
Noisy trace - constant noise on the
baseline. Incorrect configuration - power line
frequency (50 or 60 Hz) or Filter set-
tings. Check/change configuration as
needed.
Nearby source of constant interfer-
ence. Try moving cable/leads; try relocat-
ing unit.
Failure in ECG front end. Pads: Replace Power PCA.
Leads: Replace Interface PCA.
Failure in signal processing circuits. Replace Control PCA.
Noisy trace - intermittent bursts of
noise or random spikes. Nearby source of time-varying inter-
ference, such as radio transmitter
(paging, walkie-talkies) or X-Ray
system. Try moving cable/leads; try relocat-
ing unit.
Failure in ECG front end. Pads: Replace Power PCA.
Leads: Replace Interface PCA.
Failure in signal processing circuits. Replace Control PCA.
Noisy trace - low frequency, peri-
odic. More than one instrument con-
nected to the patient and active. Only have one active instrument on
the patient at a time.
Flat line - no waveform, no
Leads
Off
or
Pads Off
message.
Short in internal ECG wiring or front
end. Pads:
1. Replace Power PCA.
2. Replace Patient Con
its internal cable.
Leads:
1. Replace Interface PCA.
2. Replace ECG con
internal ECG cable.
Failure in signal processing circuits. Replace Control PCA.