Contents
Symbols ................................................................................................... 1
Safety ....................................................................................................... 5
Warnings and cautions ......................................................................................... 5
General safety considerations .............................................................................. 6
Electrostatic discharge (ESD) ............................................................................... 6
Overview .................................................................................................. 9
Purpose and scope .............................................................................................. 9
Technical support services ................................................................................. 10
Recommended service intervals ........................................................................ 14
The Welch Allyn Service Tool ............................................................................ 15
Battery performance .......................................................................................... 16
Controls, indicators, and connectors ................................................... 19
Service menu ......................................................................................... 23
Access the Service screens ............................................................................... 23
General tab ......................................................................................................... 23
Self-tests tab ...................................................................................................... 25
Logs tab ............................................................................................................. 25
Device tab .......................................................................................................... 25
Licensing tab ...................................................................................................... 26
Power-up sequence ............................................................................... 27
Troubleshooting .................................................................................... 29
Symptoms and solutions ................................................................................... 29
Technical alarm messages ................................................................................. 40
Disassembly and repair ........................................................................ 55
Required tools and equipment ........................................................................... 56
Power down the monitor ................................................................................... 56
Remove the battery ........................................................................................... 57
Remove the rear housing ................................................................................... 58
Disassemble the rear housing ........................................................................... 61
Disassemble the main chassis ........................................................................... 69
Functional verification and calibration ................................................ 99
Functional verification tests ............................................................................... 99
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