GE Dash 3000 Service Manual page 133

ECG Waveforms Display Incorrectly
Revision A
Troubleshooting: Data Acquisition Tests
e. Compare the printed graph with the sample shown below.
f. Change the patient simulator output from cal pulses to an 80-
bpm ECG waveform.
The displayed ECG waveforms should be similar to those shown
in the figure below.
If this is the case, the ECG functions of the acquisition PCB, as
well as communication between the acquisition and processor
PCBs function as designed.
1
1. If the calibration pulses are NOT correct, test the patient simulator
using a working monitor. If the patient simulator functions as
designed, calibrate the acquisition PCB. Refer to Chapter 7,
"Calibration"
2. If displayed ECG waveforms contain a significant amount of noise,
check the ECG patient cables.
3. Test the patient simulator and ECG patient cables on a working
monitor to verify the ECG signal.
4. If the ECG signal, patient simulator and ECG patient cables are
good, the acquisition PCB is suspect and you need to replace it.
Dash 3000/4000 Patient Monitor
2000966-339
535A
031A
040A
5-17