Shenzhen Comen Medical Instruments co., ltd.
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Chapter 4 Trouble Shooting
4.1 Introduction
In this chapter, electrocardiograph problems are listed along with possible causes and
recommended corrective actions. Refer to the tables to check the electrocardiograph, identify
and eliminate the troubles.
The troubles we list here are frequently arisen difficulties and the actions we recommend can
correct most problems, but not all of them. For more information on troubleshooting, contact
our Customer Service Department.
4.2 Part Replacement
Printed circuit boards (PCBs), major parts and components in the electrocardiograph are
replaceable. Once you isolate a PCB you suspect defective, follow the instructions in 7
Disassembly and repair to replace the PCB with a known good one and check that the trouble
disappears or the patient monitor passes all performance tests. Defective PCB can be sent to us
for repair. If the trouble remains, exchange the replacement PCB with the original suspicious PCB
and continue troubleshooting as directed in this chapter.
To obtain information on replacement parts or order them, refer to 3Principle introduction.
4.3 Checking Software Version
Some troubleshooting may involve software compatibility. Thus it requires you to your
electrocardiograph configuration and software version. For detailed information on version
compatibility, please contact our Customer Service Department.
To view information on the electrocardiograph system software version, select
[Menu]→[Net]→[Software Version ].
4.4 Checking Technical Alarms
Before troubleshooting the electrocardiograph, check for technical alarm messages. If an alarm
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