CurtPalme.com Home Theater Forum

[paiaboy7]

First off, thanks to everyone who makes this site available to newbie crt'rs like me. I purchased the Dwin projector recently to replace my Optoma HD-70. I spent about 4 hours last night setting it up and can't seem to get the center converged. Am I overlooking something or are the tubes just misaligned? All other areas are converged except a small area in the middle and left corner. The other part of my question is in regards to the hd fury. My current set up is lg bh200 to Onkyo 605 to 25 ft hdmi to hd fury to projector. I have a power supply on the fury and the blue light is on. I am receiving audio and even projecting the set up menu but I can't seem to get any picture. It seems like I have to program the DWIN to receive an hd signal. I have successful connected a laserdisc and dvd player through a dvdo line doubler and the picture i get is 4:3aspect ratio. Any help is greatly appreciated! Thanks.

Levy

[sneeble]

I can sympathize with your HD-700 issues. I have owned my HD700 since 2001 and every time I go through set-ups I learn something new (the documentation is not really written for us consumers). Here is my best shot at documenting the process I most recently went through and achieved really good results. I need to write it down anyway, the memory isn't what it used to be...

1) Make sure the throw distance and centering is correct first

2) Erase all TS video memories and all HD700 convergence settings. This way you start out working in Default HD memory only

3) I use a cross laser level with tripod to set the physical center of my screen

4) Check to make sure your green gun is centered inside the projector housing

5) Center focus the green gun onto the laser marks using physical left/right and tilt of the HD housing (lock it down)

6) Center focus the red and blue and loosen the hex heads that hold the red and blue guns

7) left/right center the blue and red over the green

8) In default memory set your a)focus, then b)geometry (don't worry about filling the screen yet) on all guns. Getting default memory centering, tilt, lin, and pin as good as you can get it is important (less to do later)

9) Time to set default memory convergence. Get Red and Blue convergence close but don't get too anal just yet. You'll have to redo this more times later.

10) Once Default Focus, Centering, and Geometry are as close as you can get it (again don't worry yet about size, centering, blanking etc. as you need to set TS scan rate memories first)

11) Now set your TS memories using the 10+ key inside the default memory menu (Making sure that the projector is of course set up correctly for the type of screen you have 4:3 / 16:9 etc. first)

12) you should now have three aspect ratio TS memories for 4:3, 1.85, and 2.35

13) You are now ready to set up a source (DVD etc.) and choose an active memory to match your aspect ratio.

14) You can now go in and set scan lines and recheck all of your adjustments including convergence for the video memory....whew! You still have a long way to go but hopefully you are now converged!

(EDIT: just adjusted your spacing for an easier read ~mod )

[paiaboy7]

Thanks for your help. I will do that tonight.

[jkv]

Just to add to this; before you set the red/blue center convergence, go into the center convergence menu for each of these and set both the horizontal and vertical values to 50. This way when you go back to adjust, you will be closer to the mid-adjustment value than the extremes. I was told that the closer you are to 50, the better it is for the unit.

[paiaboy7]

Ok Thanks,


I will do that as well. This has been a good learing experience for me.


Levy

[sneeble]

Thanks jkv, yes this is also very important to do while erasing the old convergence stuff. I also sent you throw distances for and 80" screen. 4:3 is 89" while 16:9 is 96.11". Most HD700's come factory set to a 100" screen which would yield an optimum throw distance of 109" to 118" (9.8 feet) so your 13 foot distance is way too far. To get optimum performance and avoid difficult adjustments you need to set it closer to 8 feet.

[paiaboy7]

Unfortunately a 13.5 ft throw is all i have to work with, so i know i will have some difficult adjustments. Thanks for the throw distances.

[macgyver655]

[ecrabb]

[sneeble]

I'm afraid SC is right! Keep in mind that the HD-700 was designed and built before all of the lower cost high volume digital projectors and was really considered (even at $12K) a low to mid range projector. Can you imagine paying $12,500 (MSRP) to get into an entry level TV? Of course not. So try to find a way to let the HD-700 provide you with the best possible experience and get it closer to that screen. You won't be sorry...PS: Try that software I sent you.

[paiaboy7]

Yes i am projecting on a wall for now. Unfortunately my home theatre room is small and i have the projector in the closet 13.5 ft from the wall. I planned on using with blu ray. Ceiling mount is also difficlult because of the layout above the ceiling, not much crawlspace. Bringing the wall closer may be an option if i buy a screen and hang it from the ceiling. I am just going by the THX reccommended viewing distance. I am sitting about 8 to 9 feet from the wall so i can't put on the floor either. Thanks.

Levy

[sneeble]

Are you able to go larger on the wall...why only 80"?

[sneeble]

If you don't mind giving me your room dimensions in inches (including ceiling height) I would be happy to give you my suggested layout.

[JayAllan]

[JayAllan]

[sneeble]

Levy,

JayAllan is right on target here...I ran the numbers and for a 4:3 screen the largest screen possible is around 127" diagonal (102"W x 76"H). Your room is 13.5' long or 162", subtract out the length of the projector (back of the case to the front of the lens) and you have 162" - ~26" = 136". This is the longest possible throw distance you can have. You would need a room 108" tall for that throw distance though. The problem is that your room is only 102" tall. Placing this restriction into the mix yields a maximum throw distance of ~126" (or a 117" 4:3) screen. This gives you a 45.7 sq. ft. screen area. Using a painted wall will yield less screen gain (~0.8 to 0.9) than if you used a commercial screen. Best option here is to eventually use a screen with gain around 1.3 but I would stay at most 1.5 or below to avoid "hot spots". The HD-700 puts out 1100 (max 10% peak white) lumens new and less as tubes age. You should try to stay at or above 11 footlamberts min. of picture brightness for best picture. Using the above numbers you come in around 19.3 footlamberts. This represents the absolute maximum throw of 126" and largest 4:3 screen of 117" given your room dimensions. As previously mentioned the larger you go the harder it is to get good HD resolution so my target would be more around 100" max. (factory preset).

[paiaboy7]

I guess my best option then is the ceiling. Where can i find i ceiling bracket or mount for the Dwin? Thanks.

Levy

[sneeble]

Levy,

The HD-700 always comes with the bracket so go back to the guy you bought it from and get both the ceiling bracket and the TS-2. You really need both of these items to make your system sing...sounds like the guy is holding out on you. You buy an HD-700 you should really be getting the whole package.

DWIN is in financial trouble as they don't answer the phone, e-mails or RMA requests so I have to think getting parts from them would also be a challenge at best. If you can't get it from the guy you bought it from you'll have to have one made I guess. Dimensions are available.

[paiaboy7]

Well just talked with the guy i bought it from and he said no ceiling bracket. I do have a coffee table it fits perfectly on. I might be able to work something out where it is next to my couch. Any ideas on building a ceiling mount? Thanks.

[Davo]

This thread has been very useful for me. I have owned a DWIN HD-700/Transcanner 1 combo for 8 years. I live in the SF bay area. It was set originally up by my installer and periodically I have the system calibrated by Robert Busch who does a great job. However, I want to make some simple changes (I think) without incurring the expense or inconvenience of having to use a professional. But I confess to being confused about how the Dwin memories work. Will someone set me straight.

I understand that the Transcanner has 3 TS memories for 3 aspect ratios. I assume that all standard definition sources that get upconverted by the Transcanner are mapped onto one of those scan frequencies. What about the HD sources that are connected to to VGA/RGB input. Somehow the projector was initially configured for a 1080i source and it looks great. But I want to add the option of a 720p source. I've read that 1080i look best on the Dwin (720p being too soft, I assume from overlapping scanlines) but I want to see for myself. When I plug a 720p source in, the aspect ratio is off and the picture looks horrible, and I haven't been able to figure out how to add another configuration into the HD-700. And how do the memories in the Transcanner and HD-700 relate to each other?

Can someone please take the time to enlighten me. I would be very grateful.

/David