Mindray DC-68, Service Manual

Page: 236 / 281

13-12 Troubleshooting of Regular Malfunctions
13.8 ECG Module Failure
13.8.1 Related Modules or Boards
No. Description Remarks
1 PCBA on ECG board /
2 PCBA on engine board /
13.8.2 Key Points Supporting Troubleshooting
No. Key Points Supporting Troubleshooting Remarks
1 Wave features of ECG signal /
2 Self test for ECG Module Information Read Test. Confirm whether the signal
processing board communicates
normally with ECG module.
3 Self test for ECG Module Self Test. Self test for ECG module.
13.8.3 Troubleshooting for ECG Module
No. Fault
Description
Cause Analysis Solution
1 Fail to open
ECG relevant
functions.
ECG_12 V provides power for ECG
module. If ECG is disabled, it indicates
communication error of ECG serial port,
or connection error of ECG module. The
error of ECG module or circuit error of
ECG serial port for signal processing
board may also occur. The possibility of
the error for ECG module is
comparatively higher.
Self test for the serial
communication between
engine board and ECG
module;
Check ECG connection cable
or replace ECG assembly.
2 Enable ECG.
The waveform
of ECG appears
as a signal line
or the shape of
the wave is
abnormal.
Abnormal ECG lead or ECG module Self test for ECG module;
Replace ECG lead or ECG
module.