Comen CM300 User manual

Three-Channel Electrocardiograph
CM300
Service Manual
Shenzhen Comen Medical Instrument Co., Ltd.

Shenzhen Comen Medical Instruments co., ltd.
Content
Chapter 1 Safety Guidance........................................................................................................1
1.1 Safety Information ....................................................................................................1
1.1.1 Danger...............................................................................................................1
1.1.2 Warnings ...........................................................................................................2
1.1.3 Cautions ............................................................................................................4
1.1.4 Notes .................................................................................................................6
1.2 Equipment Symbols ..................................................................................................6
Chapter 2 Warranty and Service........................................................................................................7
2.1 Warranty Terms.........................................................................................................7
2.2 What is excluded?.....................................................................................................7
2.3 Service Procedure......................................................................................................8
2.4 Fill in the Service Claim Form (SCF).......................................................................8
2.5 Send COMEN the SCF and Select a Solution...........................................................8
2.6 Obtain the RMA Form ..............................................................................................9
2.7 Send the Parts to COMEN ........................................................................................9
2.7.1 Contact Information ........................................................................................10
Chapter 3 Principle introduction.....................................................................................................11
3.1 CM300 system principle block diagram .................................................................11
3.2 CM300 Module Introduction ..................................................................................11
3.2.1 Main board (2410 core board + CM300 bottom board)..................................11
3.2.2 3.2.2CM100_300 ECG Board.........................................................................12
3.2.3 R-type transformer:.........................................................................................13
3.2.4 LCD Adapter Board ........................................................................................13
Chapter 4 Trouble Shooting............................................................................................................14
4.1 Introduction.............................................................................................................14
4.2 Part Replacement ....................................................................................................14
4.3 Checking Software Version.....................................................................................14
4.4 Checking Technical Alarms.....................................................................................14
4.5 Troubleshooting Guide............................................................................................15
4.5.1 4.5.1 Failure to power on with AC supply ......................................................15
4.5.2 Failure to power on with battery .....................................................................15
4.5.3 4.5.3 White or Black Screen............................................................................15
4.5.4 Abnormal screen display.................................................................................16
4.5.5 No ECG output from certain lead. ..................................................................16
4.5.6 ECG disturbance. ............................................................................................16
4.5.7 Electromyograhic disturbance.........................................................................17
4.5.8 Unstable baseline ............................................................................................17
4.5.9 Partial buttons or all buttons failure................................................................18
4.5.10 Print problem...................................................................................................18
Chapter 5 Performance Verification................................................................................................20
5.1 Safety Test...............................................................................................................20
5.2 Performance Tests....................................................................................................20

Shenzhen Comen Medical Instruments co., ltd.
5.2.1 ECG Performance test.....................................................................................20
5.2.2 Print speed test ................................................................................................20
Chapter 6 Disassembling Procedure ...............................................................................................22
6.1 Disassemble the rear panel......................................................................................22
6.2 Separate the function board in the front panel. .......................................................23
6.3 Disassemble the ECG board....................................................................................25
6.4 Disassemble the main board....................................................................................26
6.5 Disassemble the power unit ....................................................................................26
6.6 Printer disassembling..............................................................................................27
Chapter 7 Software Upgrade...........................................................................................................28
7.1 Tools........................................................................................................................28
7.2 Preparation before Upgrade System Software ........................................................28
7.3 System Software Upgrade.......................................................................................28

Shenzhen Comen Medical Instruments co., ltd.
1
Chapter 1 Safety Guidance
1.1 Safety Information
The design of the 3-channel electrocardiograph complies with international standard IEC 60601-1
Medical Electrical Equipment: General Requirements for Safety and IEC 60601-2-25 Particular
Requirements for the Safety of Electrocardiographs etc. The classification of this equipment is
Class І, type CF, which means a higher degree of protection against electric shock and the patient
connection is fully isolated and defibrillation protected.
This equipment is not explosion-proof. Do not use it in the presence of flammable
anesthetics.
This equipment is designed for continuous operation and is ‘ordinary’ (i.e. not drip or
splash-proof).
Classification:
Anti-electric-shock type:
Class І with internal power supply
Anti-electric-shock degree:
CF
Degree of protection against harmful
ingress of water:
Ordinary equipment (Sealed equipment without
liquid proof)
Disinfection/sterilization method:
Refer to the user manual for details
Degree of safety of application in the
presence of flammable gas:
Equipment not suitable for use in the presence
of flammable gas
Working Mode:
Continuous operation
EMC:
Group І, Class A
1.1.1 Danger
There are no dangers that refer to the product in general. Specific “Danger” statements may be
given in the respective sections of this manual.

Shenzhen Comen Medical Instruments co., ltd.
2
1.1.2 Warnings
In order to use the electrocardiograph safely and effectively, avoiding possible dangers caused by
improper operations, please read through the user manual and be sure to be familiar with all
functions of the equipment and proper operation procedures before use.
Please pay more attention to the following warning and caution information.
1.1.2.1 Safety Warnings
WARNING :
♦The electrocardiograph is provided forthe use of qualified physicians or
personnel professionally trained. And they should be familiar with the
contents of this user manual before operation.
♦Only qualified service engineers can install this equipment. And only
service engineers authorized by our company can open the shell.
♦Only qualified installation or service engineers can shift the mains shift
switch (100V~115V/220V~240V) according to local mains supply.
♦The results given by the equipment should be examined with respect to
the overall clinical condition of the patient.And it can not substitute for
regular checking.
WARNING :
♦EXPLOSION HAZARD-Do not use the electrocardiograph in the
presence of flammable anesthetic mixture with oxygen or other
flammable agents.
♦SHOCK HAZARD-The power receptacle must be a hospital grade
grounded outlet. Never try to adapt the three-prong plug to fit a
two-slot outlet.
♦If the integrity of external protective conductor in installation or
arrangement is in doubt, the equipment should be operated from the
built-in rechargeable battery.
♦Do not use this equipment in the presence of high static electricity or
high voltage equipment which may generate sparks.
♦This equipment is not designed for internal use and direct cardiac