Sorry for the probably silly question, but why can't I see an image on my Runco CL-700 when I feed it from RGBHV from my Faroudja LD100 line doubler? Does the LD100 only work with CRT's? The native resolution of the CL-700 is 1280x720 so, AFAIK, it should work. I do get an image when I connect both using the 15 pin D plug, just not when I use the RGBHV connector. Does the 15 pin D plug give me the full benefit of the line doubler? If so, I'll just use that plug and forget about the other connection.

Again, sorry if this is a silly question that has been covered before, but having a large LD collection forced me to look for ways to improve the image quality hence adding the LD100 to my budget theater.

Thanks in advance for any help.

Well, maybe I should narrow my question a bit more. The CL-700 is a single DLP projector. It has the usual BNC RGBHV input connectors found on projectors. When you plug in a RGB source to these connectors (no HV), it'll automatically detect that the HV isn't used and will show an image (my HDDVD and Blue-ray and work fine connected this way. It's when I connect the faroudja LD100 here, using all the RGBHV outputs, that I get no image. My main question is that should I be able to see something, or are these two units incompatible.

Here's the output specs of the LD100:

OUTPUT SIGNALS (NTSC) 525 Line Progressive
Scan/1050 Line per Frame
R, G, B Non-composite, Positive,
714mVp-p
Vertical Sync 59.94Hz, Negative, 4Vp-p,
75 Ohm
Horizontal Sync 31.5KHz, Negative, 4Vp-p,
75 Ohm

Here are the input specs on the Runco CL-700:

RGB/ HDTV (BNC) or Progressive Scan DVD players
DTV Y/PB/PR or DTV RGB video signal input.

Is one analog and the other digital?

Manuals to both:

Runco: http://www.aboutprojectors.com/pdf/runco-cl-700-manual.pdf
LD100: http://www.meridian-audio.com/faroudja/products/archives/LD100.pdf

Couple things...first off, the Faroudja will probably hurt the Runco more than help. I wouldn't bother with it.

Secondly, the 3 RCA connector on the Runco is YPrPb, not RGB. The RGBHV connection probably is looking for component when only 3 are plugged in. You are trying to use sync on green, and I could be wrong, but I don't think the CL700 can do that.

Regardless, the more important is the first point...I wouldn't use it.

Thanks for the help.

I was hoping to improve the picture quality of my Laserdiscs, having over 500 titles sitting around I thought I'd make the best of it.

My goal is to eventually just getting a line quadrupler for this, but thought I try the LD100 (line doubler) first to see how things improved.

Not sure about the CL-700's abilities, but from the manual:

The RGB BNC input supports two kinds of HDTV formats: Progressive component (DTV Y/PB/PR) and DTV RGB. The
unit will auto detect the resolution automatically

and...

1. SOURCE: Select the input source.
VIDEO: Composite video signal input.
S-VIDEO: S-Video signal input
COMPONENT: Component Y/CB/CR input
COMPONENT HD: DTV Y/PB/PR input
RGB HD: DTV RGBHV signal input (all five BNC connectors are present on the Runco)
PC: Computer signal input PC (LD100 works fine on this, although not sure if I'm getting full benefit of the LD100)

So, according to the manual, it should take a RGBHV signal.

Yes it will take an RGBHV...but only with all 5...you said you were using 3 unless I misread it.

Also, you don't really want a line doubler OR a line quadrupler. You want a video processor that can output the native res of the Runco...in your case 1280x720. That will provide the best possible image. The other 2, as mentioned, will likely detract from the image.

When connecting the Faroudja I use all five RGBHV but still get no image. It should work then, there shouldn't be any compatibility issues? Maybe the RGBHV output on the LD100 is bad, it's PC output (D plug) works with the PC input on the Runco, just not when using the RGBHV connectors.

Aside from it possibly being an inferior image, I'd still like to see it myself. Curious as to what a line doubler does to an LD image.

Thanks again for the help.

Backwords...remember the CL700 has a line doubler built in, and argueably better than the Faroudja. Plus it upconverts to 1280x720...it is different on digital projectors than CRT's. But I understand you wanting to try it first.

I don't recall, but there may be a menu selection in the CL700 that you have to do to choose between component and RGBHV...double check that.

The problem with the CL-700 is that it won't allow you to make any adjustments to the RGBHV input unless it detects a signal first, and for some odd reason it won't detect anything from the Faroudja when using the RGBHV outputs, the PC (D Plug) works fine. I just spoke to a tech from Faroudja and he says that if I'm getting a signal out of the PC output, it should be working correctly. I wonder if it just may be a problem with the BNC connectors on the Faroudja, maybe that output doesn't work.

My main concern, which I was hoping to answer here was if it should work, then I can eliminate compatibility issues as a problem and focus on possibly having a faulty Faroudja.

The Tech I spoke to spoke highly of the LD100 and says it's pretty popular now for LD use. Wish he wouldn't have it said that though, now I need/have to get it to work......

Ok, just spoke again with the Faroudja tech and he says that it should work but it may just be a problem with sensitivity where the Runco isn't picking up the output levels of the Faroudja. He also stated that the PC output (D plug) should be almost as good as the RGBHV output. The resolution picked up here is 640X480 and that's the best the Faroudja is going to output. Not exactly what I was hoping for so I'm going to start looking for an alternative solution.


Thanks again for your help.

Yes 640x480 is 480p..."line doubling". That is all the Fardoudja can do.

Thanks again Jason, to tell you the truth, I am still not clear on what means what. For example, I did not know 640x480 was 480p. Where can I get a breakdown of what each is, ie, 1080i is what? What resolution would quadrupling be?

Pappucho,

I knew that posting the question in the over $3000 forum would yield better results. As I said, Runcos and outboard line doublers just don't show up in the under $3000 threads too often.

Jim