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Troubleshooting AMX
Error Number
PC does not shut down correctly with key switch
Error Code / System Message
KEY_SW_SCALED / IF_PS_CTRL
Error Question
Why does the Definium AMX 700 PC shut down incorrectly when the key switch is turned off?
Short Answer
The Beetle Board must recognize the inverted key-switch signal and keep the digital power supply active long enough for an orderly PC shutdown.
Possible Causes
Key-switch signal not reaching Beetle Board; IF_PS_CTRL behavior incorrect; power-supply control issue.
Troubleshooting Steps
Check the key-switch scaled signal on debug-header connection 10 and IF_PS_CTRL on connection 11. With the key switch ON, the scaled key-switch signal should be 0 VDC; verify the power supply remains active for PC shutdown.
Parts Areas to Check
Beetle Board; Roadster/Digital PSA; key switch wiring
For Related Models
Definium AMX 700
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