Philips Avalon FM20 - Removing the Thermal Line Printhead (TLPH)

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10 Repair and Disassembly

172

Removing the Thermal Line Printhead (TLPH)

1 Remove the recorder chassis as described in the section “Replacing the Recorder Chassis” on

page 170.

2 Turn the recorder chassis over.

3 Remove the two screws holding the TLPH to the TLPH holder.

Main Page

Table of Contents3
Introduction7
Who Should Read this Guide7
What to Do Next7
Repair Strategy8
Manufacturer's Information8
Passwords9
Safety Information9
Configuration Mode9
Electric Hazards10
Explosion Hazard11
Liquid Ingress11
Heat Exposure11
Prohibited Environments11
Alarms12
Safe Installation13
Safe Maintenance, Repair and Care13
Site Preparation15
Site Planning15
Introduction15
Site Requirements17
Space Requirements17
Environmental Requirements18
Altitude Range18
Safety Requirements19
Electrical Requirements19
Essential Performance19
Connecting Non-Medical Devices21
Mounting Options23
Input Devices24
Installation Instructions25
Installation Checklist Fetal Monitor25
Initial Inspection26
Unpacking and Checking the Shipment Fetal Monitors26
Electrical Inspection27
Repackaging for Shipment or Storage27
Mounting Instructions28
Mounting the External Power Supply28
Line Voltage Selection29
Connecting the Monitor to AC Mains29
External Power Supply Overview29
Disconnecting the Monitor from AC Mains30
Connecting the Monitor to Non-Medical Devices30
Installing the Tympanic Thermometer31
Mounting the Tympanic Thermometer33
Tympanic Thermometer Biotech Mode33
Before Using the Monitor35
Checking and Setting Line Frequency36
Checking/Setting Paper Scale36
Checking/Setting Recorder Speed36
Fetal Recorder36
Configuring the Equipment Label37
Configuring Smartkeys37
USB/PS/2 Keyboard/Mouse37
Theory of Operation39
Monitor Hardware Overview39
Power Supply40
Connector Block40
Bus Master Board40
Main CPU Board40
Bottom Housing40
I/O Boards41
Fetal Recorder (Thermal Printer Unit)41
Recorder Adapter Board41
Paper Sensor/Stepper Motor41
LCD Display and Touchscreen42
Noninvasive Blood Pressure Assembly42
Spo2 Assembly42
Input/Output Interface Boards42
Transducer Hardware Overview43
Functional Description of the Transducer CPU43
Transducer Types43
Toco Transducer Front-End44
Ultrasound Transducer Front-End44
Toco+ Transducer Front-Ends44
Patient Module Front-Ends45
Avalon CTS Interface Cable (TMIF)45
Interfaces47
LAN / RS232 Interface48
Dual PS/2 Interface48
MIB / RS232 Interface48
Connection of USB Devices49
Flexible Nurse Call Relay50
Connection to a Network51
Network Infrastructure Requirements51
Data Privacy and Network Security Requirements52
Connection Indication Messages52
Broadcast52
Unicast52
Equipment Label and ob Tracevue53
Intellispace Perinatal Fetal Monitor Domain Name53
Data Export/ Data out Functionality53
Configuring the LAN Data Export Setting53
Configuring the MIB/RS232 I/O Board Data Export Setting54
Testing and Maintenance55
Terminology and Definitions55
Introduction55
Recommended Frequency56
When to Perform Tests56
Testing Sequence58
Visual Inspection59
Safety Tests59
Power on Test59
After each Service, Maintenance or Repair Event59
Warnings, Cautions, and Safety Precautions60
Electrical Isolation Diagram60
Safety Test Procedures61
Hints for Correct Performance of Safety Tests62
General Test Setup for the Performance of Safety Tests63
Safety Test Adapter Cable - Schematics64
Detachable Power Cord Protective Earth Test65
Sum of Functional Earth and Equipment Leakage Current Test66
Applied Part Leakage Current, Mains on Applied Part68
Measuring Circuit for the Measurement of Applied Part Leakage Current69
Applied Part Leakage Current69
System Test71
What Is a Medical Electrical System?71
General Requirements for a System71
System Example72
System Installation Requirements73
Required Protective Measures at System Installation74
Case 1: Medical Device Combined with Medical Device75
Enclosure Leakage Current Test75
Case 2: Medical Device Combined with a Non-Medical Device76
Case 3: Medical Device Combined with a Medical or Non-Medical Device79
System Test Procedure81
Preventive Maintenance Procedures82
Noninvasive Blood Pressure Measurement Calibration82
Tympanic Temperature Calibration82
Fetal Recorder Maintenance82
Performance Assurance Tests83
Full Performance Assurance Test83
Noninvasive Blood Pressure Performance Tests83
Accuracy Test83
Leakage Test84
Linearity Test84
Valve Test84
Spo2 Performance Test85
Expected Test Results85
Measurement Validation85
Multi-Port Nurse Call Connector Test (Flexible Nurse Call)86
Reporting of Test Results87
Test and Inspection Matrix88
Evaluation of Test Results91
Transducers and Patient Modules; Functional Tests91
Ultrasound Transducer Electrical Check91
Other Regular Tests91
Toco Transducer Electrical Check93
Testing the Patient Module/Toco+ Transducer: DECG Mode93
Testing the Patient Module/Toco+ Transducer: MECG Mode94
Testing the Patient Module/Toco+ Transducer: IUP Mode95
Touchscreen Calibration96
Disabling/Enabling Touch Operation97
Checking the Fetal Recorder Offset97
Setting the Fetal Recorder Offset97
Fetal Recorder Selftest Report98
Battery Handling, Maintenance and Good Practices99
Checking the Battery Status99
Battery Status on the Main Screen100
Battery Status Window101
Conditioning a Battery102
Viewing Battery Details102
Documenting Battery Status102
What Causes the Conditioning Message on the Monitor?103
After Installation, Testing, or Repair104
Conditioning Batteries104
Troubleshooting105
Replacement Level Supported105
Who Should Perform Repairs105
Checking Revision Information106
Trace Header106
Hardware Revision Check106
Checks for Obvious Problems107
Obtaining Replacement Parts107
Troubleshooting Guide107
Checks before Opening the Instrument108
Checks with the Instrument Switched On, AC Connected108
Checks with the Instrument Switched On, AC Connected, with Battery108
Individual Parameter Inops108
Initial Instrument Boot Phase109
How to Use the Troubleshooting Tables109
Boot Phase Failures110
Screen Is Blank111
Touchscreen Not Functioning112
General Monitor INOP Messages112
Battery Related Problems113
Keyboard/Mouse Not Functioning114
Network Status Icons114
Alarm Tones115
Fetal Recorder115
LAN / RS232 Troubles118
MIB / RS232 Troubles119
USB Troubles119
Tympanic Temperature Problems120
Flexible Nurse Call Relay Troubles120
No Video on Remote Display121
Transducers Troubles121
Status Log123
Troubleshooting with the Support Tool124
Troubleshooting the Individual Measurements or Applications124
Parts List125
Monitor125
Transducers126
Patient Modules127
Interface Cables127
Mounting Hardware128
Tympanic Thermometer Part Numbers128
Assembly and Kit Contents129
Bottom Housing Assembly129
Power Supply Assembly130
Contents130
Top Cover Housing131
Stepper Motor Assembly132
Paper Sensor Assembly132
Drawer Assembly133
Display Assembly133
Battery Assembly134
Transducer Cable Assembly135
Belt Button Kit135
FM Small Parts Kit - Plastic Parts and Labels136
FM Small Parts Kit - Screws and Cables137
Repair and Disassembly139
Tools Required140
Serial Numbers141
Top Cover Disassembly/Reassembly141
Removing the Top Cover Assembly141
Removing the Display Assembly146
Replacing the Display Assembly150
Recorder Disassembly158
Removing the Drawer Assembly159
Replacing the Drawer Assembly161
Removing the Recorder Chassis162
Replacing the Recorder Chassis170
Removing the Thermal Line Printhead (TLPH)172
Removing the Paper Sensor Assembly174
Replacing the Paper Sensor Assembly174
Removing the Recorder Adapter Board174
Removing the Stepper Motor177
Replacing the Recorder Adapter Board177
Replacing the Stepper Motor180
Replacing the Top Cover Assembly180
Bottom Cover Disassembly/Reassembly183
Removing the Power Supply Assembly183
Replacing the Power Supply Assembly184
Removing the Battery and the Battery Assembly185
Replacing the Battery and the Battery Assembly188
Removing the Noninvasive Blood Pressure Assembly188
Replacing the Noninvasive Blood Pressure Assembly192
Removing the Spo2 Assembly195
Connectors195
Replacing the Spo2 Assembly197
Removing the Interface Boards197
Removing the Main CPU Board199
Replacing the Main CPU Board201
Removing the Front End Assembly202
Replacing the Front End Assembly203
Disassembling the Front End Assembly204
Exchanging the Bus Master Board206
Exchanging the Fetal Socket Connector Block206
Reassembling the Front End Assembly206
Exchanging the Noninvasive Blood Pressure/Spo2 Sockets207
Exchanging the Loudspeaker207
Transducer Disassembly/Reassembly208
Exchanging the Transducer Cable208
Exchanging the Transducer Belt Button212
Upgrade Options213
Installing Upgrade Options215
Software and Firmware Upgrades222
Environmental Specifications223
Physical Specifications224
Battery Specifications226
Interface Specification226
Connectors226
Performance Specifications227
Fetal / Maternal Specifications228
Noninvasive Blood Pressure233
Tympanic Temperature236
Recorder Specifications238
Recorder Symbols238
Safety Tests Fetal Monitor - Warnings242
Electromagnetic Compatibility (EMC)242
EMC Testing243
Reducing Electromagnetic Interference243
System Characteristics244
Electromagnetic Emissions and Immunity244
Electromagnetic Immunity245
Radio Compliance Notice246
Finding Recommended Separation Distances247
Recommended Separation Distances from Other RF Equipment249
Environment250
Monitoring after a Loss of Power250
ESU, MRI and Defibrillation250
Cardiac Pacemakers and Electrical Stimulators251
Symbols on the System251
Fast Transients/Bursts251
Index255
Troubleshooting 107 , 108 , 111 , 112 , 114 , 115 , 118256
Monitor256
Power Supply 40 , 130256
Stepper Motor 41 , 132256
Belt Button256
Changing256
Kit Contents256
Interface256
Main CPU256
Failures256
Transducers257
Recorder Adapter257
Nibp 42 , 83257
Example257
Password257
Stepper Motor 41 , 132257
Disassembly257
Ecg257
Transducer257
Calibration257
Alarm258
Troubleshooting 107 , 108258
Display258
Touchscreen258
Transducers258
Transducer258

Philips Avalon FM20 - Removing the Thermal Line Printhead (TLPH)

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