Welch Allyn Atlas Service Manual page 38

Section 3 -Troubleshooting
Complaint
Power
Will not power up in AC
LEDs
Random LSD segments unlit
Subsystem LEDs unlit
LED intermittent, dim, flickering
Buttons
Button not functional
Button sticking under front bezel
Button intermittent or difficult to
make contact
sounds
No sound at all
Battery
Insufficient life
Printer
Feed problems
Waveform print quality
Text print quality
Not functional
Feeding but not printing
CRT
CRT is blank
12 WELCH ALLYN ATLAS MONITOR
3.2 Chief Complaint, Cause and Corrective Action
Cause
No wall power
Wrong wall power voltage/frequency
Fuse in power supply
Fuse in neutral wire
Power supply failure
Failed LED
Subsystem problem
Failed LED
Failed switch
Failed subsystem
Possible loose display board
Failed switch
Failed speaker or disconnected
Failed main board
Software corruption
Failing battery
Paper inserted incorrectly
Door not latched
Failed printer
Software adjustment needed
Software adjustment needed
Failed printer
Printer cable
Paper inserted backwards
Wrong kind of paper
Failed printer
CRT cables
Failed CRT
Failed Deflection board
Failed Main Board
Corrective Action
LED 1
Check subsystem LED 1
Replace Display board
Button 1
Check subsystem
Tight display board mounting screws.
Button 1
Reload software
sound 1
Battery 1
Printer 1
Printer 1
Printer 1
Printer 1
Printer 1
CRT 1
Reinstall software
Service Manual 6200-43E Rev. A