Video & projection
Sony FX9 troubleshooting
The Sony FX9 problems live-event techs bring to Ask Roadie most (also called PXW-FX9). Pick your symptom, or describe your own in plain words, and get the likeliest fix first, with the manual page when there is one.
Common FX9 errors & problems
What techs run into most, and what's usually behind it. The step-by-step fix for your exact unit is in Ask Roadie.
- Step-by-step fixGet the fix →
Any E91 / E95 error code appears
Likely cause: Third-party lenses, adapters and batteries can inject comms/power faults that surface as generic E91/E95 codes; ruling them out is free and resolves a meaningful share of cases before an expensive service trip.
- Step-by-step fixGet the fix →
Error code E91:1D0
Likely cause: The GPS receiver lives in the top handle; removing or loosening it breaks the comms link the main board expects, so the camera flags E91:1D0 until the handle is reattached or GPS is disabled.
- Step-by-step fixGet the fix →
Error code on LCD starting with E12 (e.g. E12:xxx)
Likely cause: The FX9 ND is electronically driven; a stuck/failed drive or a comms fault from a non-Sony accessory is the usual trigger.
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Error codes E91:360, E91:367 or E91:36C
Likely cause: The 360/367/36C sub-codes point at the XDCA interface rather than the camera body, so detaching the failed extension unit removes the faulting subsystem.
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Need V-mount power, RAW output, or advanced networking not available on the bare body
Likely cause: RAW output, V-mount power distribution and the network stack physically live in the XDCA, so those workflows require the extension unit — this is by design, not a fault.
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Poor low-light performance / heavy noise in S-Log3
Likely cause: The FX9 sensor has two native sensitivity points.
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Record start/stop is delayed several seconds when an external timecode is fed to TC IN
Likely cause: The fix is in the v4.01 firmware; the delay was a known TC-IN handling bug in earlier firmware, so the update is the definitive remedy rather than a workaround.
- Step-by-step fixGet the fix →
Recording stops suddenly / data-writing (buffer overflow) error on a card that used to work
Likely cause: High-bitrate XAVC-I (up to 600 Mb/s) needs sustained write speed; an in-camera full format restores a clean, contiguous file structure the card can write to at rate.
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Unknown media / card not recognised
Likely cause: The FX9 writes its own file/directory structure; a card formatted elsewhere or a failing card presents as unknown media.
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Which firmware is current and how to update the FX9
Likely cause: Running current firmware fixes known bugs (notably the TC IN record-trigger delay) and adds cloud/LUT workflow features; interrupting the ~40-min flash can brick the camera, hence the power caution.
Not on the list? Describe it your way, or paste the error code off the display. Ask Roadie works the problem with you until it's fixed or you have a clear next move.
How Ask Roadie helps with the FX9
- 1. Pick the Sony FX9. It's already in the list.
- 2. Describe what you're seeing. In your own words, or the error code off the screen.
- 3. Get the likeliest fix first. Steps in order, the manual page when there is one, and a note when other techs have confirmed it.
- 4. Still broken? Tap 👎 and it keeps going from where you left off.