YN-622N & SB900

boyfalldown

boyfalldown

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Hugh
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Help,

I've RTFM and still non the wiser. My new YN-622N will not fire my sb900s in TTL mode. Manual mode is fine but TTL nThere is a signal to the flash and the triggers receive one another but the flash doesn't fire
 
•
Of course not!

• all flashes will respond in slave mode
• but TTL is a whole different ball game:
In TTL, all flashes must talk to each other! Makers did a language that only
units of their own make will understand…
There you have it… a Babel tower syndrome!
 
Kodiak Qc said:
•
Of course not!

• all flashes will respond in slave mode
• but TTL is a whole different ball game:
In TTL, all flashes must talk to each other! Makers did a language that only
units of their own make will understand…
There you have it… a Babel tower syndrome!
Click to expand...


I don't understand your post. They're ttl triggers. They're supposed to make sense of Babel?
 
•
With all the technologies out there, I would recommend that you go back to
the seller for explanation or use the RFM strategy. Babel there is!
 
Did you get a TX?

IIRC to control them without a TX required some weird button combinations, which is why the N versions were late arriving and also why the N TX came before the C TX, because there was a greater need.
 
Phil V said:
Did you get a TX?

IIRC to control them without a TX required some weird button combinations, which is why the N versions were late arriving and also why the N TX came before the C TX, because there was a greater need.
Click to expand...


I have a tx as well. All groups are on Ttl with it
 
boyfalldown said:
I have a tx as well. All groups are on Ttl with it
Click to expand...
Batteries, all modes etc etc. Have you tried with several flashes? Is it just that one flash? It feels daft asking you, have you narrowed it down to this one flash?
 
I found that if my batteries became low on my YN-622N or TX things would become intermittent. The TX has a power scale and is quite power hungry, I ALWAYS carry spare batteries.
 
Phil V said:
Batteries, all modes etc etc. Have you tried with several flashes? Is it just that one flash? It feels daft asking you, have you narrowed it down to this one flash?
Click to expand...


Tried all that. I'm getting some sort of signal to the flash. It just doesn't fire.
 
metroman said:
I found that if my batteries became low on my YN-622N or TX things would become intermittent. The TX has a power scale and is quite power hungry, I ALWAYS carry spare batteries.
Click to expand...


Thank you.ill check they're fully charged
 
Ok a quick update. I can only think of these as faulty now. Ive asked for a replacement set to see if any better
 
Hi Hugh.

These maybe things you've already checked a million times, and as Phil said, it feels daft asking you, but each of them has caught me out before now using the YN622N and TX:-

  • Are the units all on the right channel/group?
  • Is the SB900 "On" rather than "Remote", and in TTL mode?
  • Is it in the shoe on the receiver properly (and the right way round - if like me you sometimes have to twist the head round 180 degrees on the flash for some reason, next time, you end up inserting it backwards....)? I used to store mine in the bubble wrap, and small pieces of bubble wrap would become lodged in the shoe, or foot on the TX.
  • Is SU-4 mode disabled on the SB900?
  • Are any of the lights in that group pointed back at the camera? (it sees a load of light from the test flash, and turns it down so low you don't see it flash - just a theory)
  • Shutter speed has drifted above x-sync and HSS is disabled on the camera.
  • What happens when you press the test button on the flash?
  • What happens when you press the test button on the receiver?
  • What happens when you press the test button on the TX?
Of course, if they work in manual mode and by that you meant putting that group into manual on the TX, then all the above reasons are highly unlikely to be the cause of your problems.
 
Scooter said:
Hi Hugh.

These maybe things you've already checked a million times, and as Phil said, it feels daft asking you, but each of them has caught me out before now using the YN622N and TX:-

  • Are the units all on the right channel/group?
  • Is the SB900 "On" rather than "Remote", and in TTL mode?
  • Is it in the shoe on the receiver properly (and the right way round - if like me you sometimes have to twist the head round 180 degrees on the flash for some reason, next time, you end up inserting it backwards....)? I used to store mine in the bubble wrap, and small pieces of bubble wrap would become lodged in the shoe, or foot on the TX.
  • Is SU-4 mode disabled on the SB900?
  • Are any of the lights in that group pointed back at the camera? (it sees a load of light from the test flash, and turns it down so low you don't see it flash - just a theory)
  • Shutter speed has drifted above x-sync and HSS is disabled on the camera.
  • What happens when you press the test button on the flash?
  • What happens when you press the test button on the receiver?
  • What happens when you press the test button on the TX?
Of course, if they work in manual mode and by that you meant putting that group into manual on the TX, then all the above reasons are highly unlikely to be the cause of your problems.
Click to expand...

Thank you. I've tried everything I can think of with them. I suspect a dodgy set sadly, so we'll see if the replacements work
 
Last edited:
I recently had what I thought was an intermittent trigger/receiver/flash issue. Turns out one of the fairly new and freshly charged batteries was unable to take a charge which I discovered only after buying a new charger that could give me the charge status of each battery.
What threw me was that before I got the new charger, 3 ok batteries and 1 dud battery would still fire the flash fine, but when I swapped what I thought were good batteries into the transmitter/receivers, they wouldn't work.
I ended up discovering several dud batteries which meant that each set of fresh batteries I tried in the gear always had a dud causing the failure.
Worth a check.
 
Last edited:
That's a shame....

I mean well done Hugh ;)
 
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