Game Over...
My lcd screen does not show anything at all. There was an unfortunate accident involving my daughter and it seems to not work at all...
Right after the incident I connected it and seemed to be ok, but later I tried to make it work but nothing.... 
I was hoping to make a DIY RPTV with that fresnel...
@#%#$%# I'm so P#$%^%$@@#D... I've put so much effort on it, and now it's all screwed. Everywhere seems to be out of good-priced tiny lcd's... and don't have the $40+ bucks for another one... 
Thanks Guy for hanging out and helping me throughout this journey... I guess it's back to the bulky dim OHP setup.
Adios
My lcd screen does not show anything at all. There was an unfortunate accident involving my daughter and it seems to not work at all...
Right after the incident I connected it and seemed to be ok, but later I tried to make it work but nothing.... I was hoping to make a DIY RPTV with that fresnel...
@#%#$%# I'm so P#$%^%$@@#D... I've put so much effort on it, and now it's all screwed. Everywhere seems to be out of good-priced tiny lcd's... and don't have the $40+ bucks for another one... Thanks Guy for hanging out and helping me throughout this journey... I guess it's back to the bulky dim OHP setup.
Adios
Ive been following this thread abit -- and that was an unexpected conclusion🙁 🙁 🙁 !!!
Dont give up man!
Check the wiring inside, something could have ripped off!
Keep calm though🙄
Dont give up man!
Check the wiring inside, something could have ripped off!Keep calm though🙄
sorry to hear that
That's a shame. These panels are so fragile once you strip them. That might be a good argument for repackaging them in a frame with Lexan on both sides, just to make them at least as damage resistant as an OHP LCD panel. I keep envisioning having the projection lens fall back into the box and right through the LCD! At least they don't explode into a million sharp fragments, like a CRT.
Must be an unlucky day for Projector DIYers: I just sliced the top of my thumb with a razor knife while I was cutting out rings from a mailing tube, to make a symmetrical duplet. (I'm usually smart enough to cut AWAY from my hands!) Fortunately it was a new blade (and so pretty clean), and I got the bleeding stopped with a few minutes of pressure. A big bandage and a little Ibupropen later, it doesn't even hurt anymore, but it will slow me down on my projector building.
Does anybody have a spare small LCD left over after an upgrade, that needs a good home? An old PS1 gathering dust?
That's a shame. These panels are so fragile once you strip them. That might be a good argument for repackaging them in a frame with Lexan on both sides, just to make them at least as damage resistant as an OHP LCD panel. I keep envisioning having the projection lens fall back into the box and right through the LCD! At least they don't explode into a million sharp fragments, like a CRT.
Must be an unlucky day for Projector DIYers: I just sliced the top of my thumb with a razor knife while I was cutting out rings from a mailing tube, to make a symmetrical duplet. (I'm usually smart enough to cut AWAY from my hands!) Fortunately it was a new blade (and so pretty clean), and I got the bleeding stopped with a few minutes of pressure. A big bandage and a little Ibupropen later, it doesn't even hurt anymore, but it will slow me down on my projector building.
Does anybody have a spare small LCD left over after an upgrade, that needs a good home? An old PS1 gathering dust?
I think it may not be over....
It was a depressing time last night not being able to do anything or experiment.... I don't like wasting money, and I felt bad that I had...
Now before I go on I've got a shoutout for Ancorp,
Thanks for your advice. I was really mad... so instead of taking my fury with the lcd, I decided to take it with the intergalactic creatures in Halo.... great therapy !! 😎 I kicked some buttae !!!
Ok, so after having that out of my system and getting some sleep I went back and tried to see what was wrong with it... I plugged it in and nothing happened... but then I remember that before, -at times- I would get burned by a little cable that used to connect the backlight and which I did not cut completely... so, I brought the lcd today to work and checked it out... I plugged everything in, but no burn
... and I purposedly tried to get burned (it's just a tiny little shock, nothing serious) but no burn... moved the switch back and forth... still no burn.
So now my thoughts are: either (1)my power cable need better welding (thanks to my GREAT soldering iron skills
) or (2)the board is fried (which I know nothing about electronics and how to troubleshoot)...
So I'll go back home today and re-weld it... keep your fingers crossed !!!!
P.S. Guy, I hope your' doing better...
Ancorp, do you think I should still be ok with that RPTV? I think I' might call the person up and make him an offer or something...
It was a depressing time last night not being able to do anything or experiment.... I don't like wasting money, and I felt bad that I had...
Now before I go on I've got a shoutout for Ancorp,
Thanks for your advice. I was really mad... so instead of taking my fury with the lcd, I decided to take it with the intergalactic creatures in Halo.... great therapy !! 😎 I kicked some buttae !!!
Ok, so after having that out of my system and getting some sleep I went back and tried to see what was wrong with it... I plugged it in and nothing happened... but then I remember that before, -at times- I would get burned by a little cable that used to connect the backlight and which I did not cut completely... so, I brought the lcd today to work and checked it out... I plugged everything in, but no burn
... and I purposedly tried to get burned (it's just a tiny little shock, nothing serious) but no burn... moved the switch back and forth... still no burn. So now my thoughts are: either (1)my power cable need better welding (thanks to my GREAT soldering iron skills
) or (2)the board is fried (which I know nothing about electronics and how to troubleshoot)...So I'll go back home today and re-weld it... keep your fingers crossed !!!!
P.S. Guy, I hope your' doing better...
Ancorp, do you think I should still be ok with that RPTV? I think I' might call the person up and make him an offer or something...
Guy Grotke,
Sorry to hear that - that sucks, lol! Glad you got back on your feet quickly!
Tetutigre,
Hmmm, Virtual anger management, lol!
Keep at it, there are good chances of the LCD powering up!
I too got shocked by the damn transformer near the backlight plug.
The RPTV sounds like a half-decent deal to me - but see if you can test it first, perhaps it works ok, could use abit of tweaking thats all... than $50 is a great deal! BTW, try getting it for less, start at 20... than say 28, thats all you got... if the person wants more, tell him, fine i guess i can borrow 10 from someone... lol you get the idea... Good luck!
Sorry to hear that - that sucks, lol! Glad you got back on your feet quickly!
Tetutigre,
Hmmm, Virtual anger management, lol!
Keep at it, there are good chances of the LCD powering up!
I too got shocked by the damn transformer near the backlight plug.
The RPTV sounds like a half-decent deal to me - but see if you can test it first, perhaps it works ok, could use abit of tweaking thats all... than $50 is a great deal! BTW, try getting it for less, start at 20... than say 28, thats all you got... if the person wants more, tell him, fine i guess i can borrow 10 from someone... lol you get the idea... Good luck!
getting shocked
If you are getting shocked from the backlight circuit, you should put some tape on the wires, or some insulation on the terminals. Radio Shack or any electronics store has brush-on paint for this, but you can also use silicone RTV or clear fingernail polish.
This is not just for your sake: When you get such a shock your fingers could carry the high voltage to other parts of the board and fry some delicate CMOS chips!
If you are getting shocked from the backlight circuit, you should put some tape on the wires, or some insulation on the terminals. Radio Shack or any electronics store has brush-on paint for this, but you can also use silicone RTV or clear fingernail polish.
This is not just for your sake: When you get such a shock your fingers could carry the high voltage to other parts of the board and fry some delicate CMOS chips!
OK, so I checked it again... re-welded (is that the correct verb) the power supply cable and check all connections... but still no power to anything, no shock or burn... I looked at the controller boards but there was nothing that seemed burnt or anything...
so now my question is, Guy, I know you work for Conexant, and probably know a bit about chip and stuff... could it be possible for me to send you the screen and maybe you can check it out and see what is wrong, or what I'm doing wrong? And I also have another screen that I could use, but there is no pinout for the power supply or video... it's only pins like the ones in computer and backlights... if you could help me with the both I would REALLY appreciate it. -or even just with one.
Ancorp,
I decided to back out on the RPTV. The lowest was $50; I also got some words from other people that the seller is not very trustworthy and stuff... and most important, I don't have room at all !!! I mean, if it worked I could find a place, but if it didin't I wouldn't have anywhere to put it to sit and collect dust while I try to find my way into this projection stuff. On a side note, could you draw a diagram on where your RPTV componets are located, where the fresnel is, and the screen, mirror, etc...
Fingernail polish ??? who would've thought....
so now my question is, Guy, I know you work for Conexant, and probably know a bit about chip and stuff... could it be possible for me to send you the screen and maybe you can check it out and see what is wrong, or what I'm doing wrong? And I also have another screen that I could use, but there is no pinout for the power supply or video... it's only pins like the ones in computer and backlights... if you could help me with the both I would REALLY appreciate it. -or even just with one.
Ancorp,
I decided to back out on the RPTV. The lowest was $50; I also got some words from other people that the seller is not very trustworthy and stuff... and most important, I don't have room at all !!! I mean, if it worked I could find a place, but if it didin't I wouldn't have anywhere to put it to sit and collect dust while I try to find my way into this projection stuff. On a side note, could you draw a diagram on where your RPTV componets are located, where the fresnel is, and the screen, mirror, etc...
Fingernail polish ??? who would've thought....
looking at your LCD
tetutigre:
I write chip test software for them, but I have done some simple board design. If you have no other hope, I am willing to look at your busted LCD. I see that neither one of us has published our email addresses. You can contact me by phone (figure out how!), or maybe we can both send our email addresses to ancorp.
ancorp:
May we use you to exchange email addresses?
Thanks,
Guy
tetutigre:
I write chip test software for them, but I have done some simple board design. If you have no other hope, I am willing to look at your busted LCD. I see that neither one of us has published our email addresses. You can contact me by phone (figure out how!), or maybe we can both send our email addresses to ancorp.
ancorp:
May we use you to exchange email addresses?
Thanks,
Guy
OK, I think I did it right, changed my member preferences to show the e-mail thing. Hope it works.
Guy,
Thanks for being willing to help me out, I am clueless about all this... since my only DIY experience was to flop my Telex Magnabyte on top of my OHP (not DIY really). I hope the hip lcd works just because of the simplicity of things involved in the projector I guess. And the space of course. Of course if you can help me get the other lcd (5.6'') on track,I could use a CRT lens and stuff... 🙄 all those wishes...
can you tell it's Christmas ?!?!?
LOL
Ancorp,
The fresnel is 38'' x 29'' (4:3) -found it at our local thrift store. It's got scrathes, but it's in overall good condition. How big is the FS mirror in your RPTV? how's the alignment accomplished? I tried using my tv with it, and it magnified it, but the further away it was it started to see ghosting... but now can you project something onto the FS mirror and the straight into the fresnell and make it bigger?? would that work, or is it how it works? Just wondering...
Thanks fellers !!!
______________________________
Jesus is the reason for Christmas.
Guy,
Thanks for being willing to help me out, I am clueless about all this... since my only DIY experience was to flop my Telex Magnabyte on top of my OHP (not DIY really). I hope the hip lcd works just because of the simplicity of things involved in the projector I guess. And the space of course. Of course if you can help me get the other lcd (5.6'') on track,I could use a CRT lens and stuff... 🙄 all those wishes...
can you tell it's Christmas ?!?!?
LOLAncorp,
The fresnel is 38'' x 29'' (4:3) -found it at our local thrift store. It's got scrathes, but it's in overall good condition. How big is the FS mirror in your RPTV? how's the alignment accomplished? I tried using my tv with it, and it magnified it, but the further away it was it started to see ghosting... but now can you project something onto the FS mirror and the straight into the fresnell and make it bigger?? would that work, or is it how it works? Just wondering...
Thanks fellers !!!
______________________________
Jesus is the reason for Christmas.
Tetutigre,
I dont know the mirror dimentions - didnt measure it, and the tv is closed up... Its shaped like a trapezoid (is that the right word?)
The top is about as wide as the screen, the bottom is about 5-10 inches shorter...
The CRT's in a projection tv (or DLP/LCD projector if you wish) focuses through the projection lenses, the projection light path folded by the FS mirror, bounced off onto the screen. The fresnel is ontop of the screen is to push the light towards the viewer, help reject ambient light. On top of that there is a lenticular sheet that I belive adds alot more horizontal viewing angle. My theory - but probably the real theory behind RPTVs...
"hows the alignment accomplished?" alighnment of what, the mirror or the CRTs (convergence?)
I dont know the mirror dimentions - didnt measure it, and the tv is closed up... Its shaped like a trapezoid (is that the right word?)
The top is about as wide as the screen, the bottom is about 5-10 inches shorter...
The CRT's in a projection tv (or DLP/LCD projector if you wish) focuses through the projection lenses, the projection light path folded by the FS mirror, bounced off onto the screen. The fresnel is ontop of the screen is to push the light towards the viewer, help reject ambient light. On top of that there is a lenticular sheet that I belive adds alot more horizontal viewing angle. My theory - but probably the real theory behind RPTVs...
"hows the alignment accomplished?" alighnment of what, the mirror or the CRTs (convergence?)
I was talking about the alignment of the mirror in respect to the projector and the screen... covergence only applies to the crt tubes I believe. I just wanted to check and see what was the alignment like - from the projected image onto the mirror and bounced to the fresnel focal point (I think)... now, what do you think if I projected a TV's image to that path... would it be something doable, or would I need your kind of triplet? Just wondering again... and wandering. LOL 
Now if I could get a hold of a lenticular sheet.... 
Do you have any resolution issues in yours? I remember seeing some RPTV up close and they didn't seem to have a sharp image... or maybe it's just me.
Now if I could get a hold of a lenticular sheet.... Do you have any resolution issues in yours? I remember seeing some RPTV up close and they didn't seem to have a sharp image... or maybe it's just me.
Lol, I have no idea about what focal points its at...
"what do you think if I projected a TV's image to that path... would it be something doable, or would I need your kind of triplet?"
you mean if you projected a tv set onto your big fresnel, and have a mirror along the path? You cant project onto the fresnel, it will just magnify the image more, i.e. it will become part of the objective lens, whatever you point the whole thing at, thats what it will project on. If you want to project like in an RPTV, you will need the actual screen as far as I know, the fresnel is just to direct the light towards the viewer... Or em I not getting this right?
CRT projectors generally have a much more smoother image when compared to the fixed pixel field (dlp/lcd) projectors. My RPTV is only 480i, but at 640x480 on Svideo, my computer is usable!
"what do you think if I projected a TV's image to that path... would it be something doable, or would I need your kind of triplet?"
you mean if you projected a tv set onto your big fresnel, and have a mirror along the path? You cant project onto the fresnel, it will just magnify the image more, i.e. it will become part of the objective lens, whatever you point the whole thing at, thats what it will project on. If you want to project like in an RPTV, you will need the actual screen as far as I know, the fresnel is just to direct the light towards the viewer... Or em I not getting this right?
CRT projectors generally have a much more smoother image when compared to the fixed pixel field (dlp/lcd) projectors. My RPTV is only 480i, but at 640x480 on Svideo, my computer is usable!
I thought I had already posted... mmmmmm that's weird. Anyway, I'm attaching the picture of the fresnel so you get an idea of it. I remember having one of those tv screen magnifier (they still sell them for older people with vision problems and stuff I think) ith turns a 19'' tv to a 26''... of course the viewing angle was limited, you could not see it from the sides and stuff.
Now, about the brightness... a crt or lcd projector are way brighter than a tv, but would it work ok in those conditions (enclosed, short distance)?? Just wondering again.
Guy,
could you please contact me to get your address and ship the lcd's ??? I've got the e-mail thing setup on the forum, but if it doesn't work, the e-mail is my screen name, @ yahoo. Thanks again for being willing to help me out !!
Now, about the brightness... a crt or lcd projector are way brighter than a tv, but would it work ok in those conditions (enclosed, short distance)?? Just wondering again.
Guy,
could you please contact me to get your address and ship the lcd's ??? I've got the e-mail thing setup on the forum, but if it doesn't work, the e-mail is my screen name, @ yahoo. Thanks again for being willing to help me out !!
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