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 ............................................................................ 14
Battery performance .......................................................................................... 16
Controls, indicators, and connectors ................................................... 19
Service menu ......................................................................................... 23
Access the Service screens ............................................................................... 23
General tab ......................................................................................................... 23
Self-tests tab ...................................................................................................... 26
Logs tab ............................................................................................................. 26
Device tab .......................................................................................................... 27
Licensing tab ...................................................................................................... 27
Power-up sequence ............................................................................... 29
Troubleshooting .................................................................................... 31
Symptoms and solutions ................................................................................... 31
Technical alarm messages ................................................................................. 45
Disassembly and repair ........................................................................ 59
Required tools and equipment ........................................................................... 61
Disassembly overview ....................................................................................... 62
Section A ................................................................................................ 63
Power down the device ..................................................................................... 63
Exploded view, front exterior ............................................................................. 64
Exploded view, rear interior ............................................................................... 71
Section B .............................................................................................. 103
Power down the device ................................................................................... 103
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