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Troubleshooting AMX
Error Number
Display issues, trashy, scrolling or no display during charge.
Error Code / System Message
Error Question
How do I troubleshoot this AMX-4 Series issue: Display issues, trashy, scrolling or no display during charge?
Short Answer
Monitor LVLE +5 V with an oscilloscope for about 15 minutes and look for breakup/noise on the +5 V supply. If noise is evident, replace the LVLE. If LVLE appears OK, check the Display kV/mA Charge Bar Board (Kit Part #2139946) or Display Controller Board (Part #46-264982G1). Battery Charger Board failure is also possible; tap on relays to see if display failure occurs. Solution: replace LVLE Power Supply, Display kV/mA Charge Bar Board, Display Controller Board and/or Battery Charger Board as indicated by troubleshooting.
Possible Causes
Problem: Display issues, trashy, scrolling or no display during charge.
Troubleshooting Steps
Monitor LVLE Power Supply +5 volt with a scope for about 15 minutes - look for break-up (noise) on +5 volt supply, If noise is evident, replace the LVLE Power Supply. If LVLE Power Supply appears OK, this could also be caused by a bad Display Board (replace with orderable kit Part # 2139946) or Display Controller Board (Part # 46-264982G1). Also could be possible Battery Charger Board failure. Check tap on relays to see if display failure occurs. Replace LVLE Power Supply, Display kV mA Charge Bar Board, Display Controller Board and/or Battery Charger Boards
Parts Areas to Check
Battery Charger Board; LVLE Power Supply; Display Controller Board; Display Board; Battery
For Related Models
AMX-4, AMX-4+, Definium AMX 700
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