I've been searching for an answer to the 3d sync issues I've had from the start between my UN46C8000 and my active 3d glasses. I thought it would be helpful to run down the troubleshooting list I went through to resolve as there certainly a lot of possibilities given the components, content, connections, and the opinion/misinformation that is floating around about 3d in general.
Denon AVR-1911 (HDMI 1.4 compliant)
PS3 (updated firmware to work with 3d content)
Samsung UN46C8000 (updated to the latest firmware to fix ghosting)
Samsung active 3d glasses x 2
1.4 HDMI interconnects between all components
40 ft 1.4 HDMI w/Ethernet from TV to AVR
A brightly lit room with windows all around (plenty of glare and interference)
I have a legacy in-the-wall homerun of cables from the wall where my old plasma was mounted to a component rack in the same room at a different location, about 12' as the crow flies, but about 35' in-the-wall. Since the house was built 7 years ago, it was time to run an HDMI cable. I went with MP cable, and had a lot of questions for them about long runs and certified high speed cables, etc. So, to clear something up about standard vs. high speed and 1.3 vs. 1.4 w/wo Ethernet: just because a cable isn't certified high speed doesn't mean that in the real world it is not capable of delivery HD 3d content. For example, the longest certified HDMI cable MP sells I believe is 25', however, in the real world, they have tested runs much longer and have been able to have HD 3d work flawlessly. Also, 1.3 cables in general should be fine too, they just won't have the return data stream wire that the new 1.4 will have.
After installation/setup, it was apparent that although my TV was receiving 3d content (double image, Samsung 3d icon), my glasses were only intermittently displaying said 3d content (they would dim the TV would display fantastic 3d content, and then quickly lighten and be back to a double image) -- a sync issue. I also noticed that if I stood within 3' of the TV at about a 45 degree angle from the IR emitter the glasses would stay synced. I wasn?t quite satisfied with that workaround, so I started at the task of eliminating potential causes.
First up, the glasses. My thought was perhaps the glasses needed new batteries (I doubted it was the IR on the glasses as both had the same problem). I took a trip down to my local BB store to test the glasses with several 3d Samsung TV's in-store and the glasses worked flawlessly. Note, I tested these out in the main part of the store under the bright fluorescent lighting with IR and flashing screens all round. The glasses never lost their sync. The glasses weren?t the issue.
My next step was to eliminate any interference that might be coming from the AVR. I didn't think this was the issue as HD and HD3D should be an all-or-nothing connection, but what the heck. So I connected the PS3 directly to the 40' HDMI cable which connects directly to the TV -- same issue. Next I connected with a 6' HDMI cable and still the same problem with syncing.
Finally, I tried different content: Monster House, MLB 3-D, How to Train a Dragon, all with the same result.
Time to call Samsung now that I had given it the good college go.
Based on what I told them they ordered a new IR emitter and motherboard and a tech came out 2 days later. The first thing he did was to take his cell phone camera to verify the IR emitter was sending a signal (apparently digital cameras are good at this, causing red eye and capturing images of ghosts in movies). Nothing. I tried with my cell phone and another DSLR to no avail. This didn't make any sense given the fact we were able to view solid 3d content at a specific position; obviously something was working, just not that effectively.
He deputized me and I helped him un-mount the TV and take off the cover. The first thing he did was replace the IR unit. Cover back on, remount, same problem
Motherboard next, rinse and repeat -- same GD problem!
Call into a super tech guy down in New Orleans who tells him that the previous 7000 series had a know issue of some tape covering the IR bezel from the side. Nada.
So he calls it quits for the day and tells me he'll call super tech guy tomorrow and get back to me.
Next day I get a call and he tells me he has it solved and we'll be out in a hour to fix. I giggle like a school girl.
He arrives, and as we are doing our master/apprentice thing for the umpteenth time, he tells me he had a job that morning to fix an 55" 8000 series IR emitter and realized that the emitter on my set was installed the opposite direction!! I spill a box of matches on the ground to see if his savant like skills work in other applications but no such luck.
So a little switcheroo, cover back on, back on the wall, system on, DVD playing, glasses on, us holding hands on the couch AND....
Wait for it.
BAM, perfect 3d content bad room lighting in all! I moved all over the room, shook my head and never lost sync. Problem solved!
So, my recommendation is to test the following before calling Samsung:
1. Find a location about 2-3' just left of the screen and loot at the IR emitter on the bottom left of the screen (while playing 3d HD content of course). Do the glasses dim and do you see a 3d image? If yes, proceed to step 2, if no, and you see a double image, it's the IR emitter or motherboard.
2. Take a digital camera and with 3d content playing see if you see a flashing light coming from the IR emitter. If no, than I'd bet you a sack of 3d glasses that the emitter is installed incorrectly.
Sorry for the long diatribe, I just thought it might answer any questions that would come up.