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Troubleshooting AMX

Error Number
Filament driver fault
Error Code / System Message
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Error Question
How do I troubleshoot filament driver faults on the Brivo XR285amx?
Short Answer
Use Fil1/Fil2 closed-loop, transformer-primary, and short-circuit diagnostics to distinguish filament driver, transformer, HV cable, and tube faults.
Possible Causes
Filament driver fault; transformer-primary issue; HV cable/tube filament issue; 48 V supply fault.
Troubleshooting Steps
Run the matching filament diagnostics. Inspect J5/J6 heater cable, cathode HV cable, and filament impedance. Use the no-tube/no-HV-cable tests when needed to isolate tube versus cable/generator.
Parts Areas to Check
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For Related Models
Brivo XR285amx
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