Video & projection
AJA FS4 / FS2 / FS-Mini frame synchronizers troubleshooting
The AJA FS4 / FS2 / FS-Mini frame synchronizers problems live-event techs bring to Ask Roadie most (also called frame sync, FS-Mini, FS2, FS4). 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 FS4 / FS2 / FS-Mini frame synchronizers 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 →
FS-Mini firmware / software update via Mini-Config
Likely cause: Mini-Converters including the FS-Mini update through Mini-Config over USB, and the Local/Remote DIP must allow software control for the app to take over.
- Step-by-step fixGet the fix →
FS-Mini reference / genlock input details
Likely cause: Feeding the right reference type at the right level and selecting reference genlock in Mini-Config is what lets the FS-Mini time to house clock.
- Step-by-step fixGet the fix →
FS2 firmware version and update
Likely cause: FS2 ships two parallel firmware branches for two hardware revs; flashing the matching branch (latest v2.1.3/v3.0.4) is required to avoid a mismatch.
- Step-by-step fixGet the fix →
FS4 4K/UltraHD in but only getting HD / channels behaving oddly
Likely cause: The FS4 is either one 4K path or four HD paths; picking the wrong mode explains "4K in but HD behavior".
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FS4 firmware update procedure and current version
Likely cause: Naming the current version and the exact web-UI update path prevents mid-flash power loss and confirms techs are on the latest secure build.
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FS4 output black / will not lock even though reference is connected
Likely cause: Genlock is only possible within a frame-rate family; mismatched families (50Hz vs 59.94Hz) is the most common cause of a "connected but no lock" alarm.
- Step-by-step fixGet the fix →
FS4 power alarm with dual/redundant supplies
Likely cause: Redundant PSUs are designed to alarm on single-supply loss so the failure is caught before the second supply also fails; reseating/repowering the missing feed clears it.
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How much video delay can the FS4 add (buffer/sync delay)?
Likely cause: The 6→20 frame buffer change arrived with v3.0, so available delay range depends on firmware version.
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Settings changes ignored (FS-Mini / Mini-Converters)
Likely cause: Local/Remote arbitrates between physical DIPs and Mini-Config so the two can't fight — the wrong mode makes the unit look like it's ignoring you.
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 FS4 / FS2 / FS-Mini frame synchronizers
- 1. Pick the AJA FS4 / FS2 / FS-Mini frame synchronizers. 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.
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