Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: SirPeale on May 31, 2009, 05:19:53 pm
-
I'm trying to hack a PSOne LCD to take RGB from an arcade board so I can use it as a test bench.
Most of the info has been straight forward...the R, G and B pins on the connector are obvious. And the grounds need to be looped together, as each color has it's own ground (or so I've read) (and yes, I know a ground is a ground is a ground).
The confusing thing is the sync signal. I know it's expecting CSYNC, will this work straight from an arcade board (std res, of course) or do I need to rig something up?
-
My understanding is it'll hook straight up..... CSYNC being Composite Sync.
I know other people have used the same LCD screen for test rigs like this before because of the simplicity of it.
-
Thanks.
Your PDF would be great if downloading attachments currently worked! :)
-
Your PDF would be great if downloading attachments currently worked! :)
What?!?!
:P I thought that got straightened out already.
It was anything special anyways, just a bunch of letters and words and colors and stuff. ;D
-
Found it elsewhere for ya.
http://members.iinet.net.au/~paulhng/serio/PSOneLCD.pdf
-
Something's not right...all I can get is a white screen. Sometimes with lines, sometimes not. :banghead:
Doesn't matter what source I have it hooked up to.
-
I just asked one of local guys that I KNOW has used one on his test rig........ will see if he has any other advice.
I was thinking someone else on here had used one before too, but I haven't looked around very hard.
-
Thanks, I appreciate it. I'm scratching my head on this one. AFAIK I have everything hooked up correctly, it's not that hard!
-
IF i'm reading this correctly, and ur using a vga type input .
it would seem that hooking the game under test's composite sync output to the appropriate sync pin(s) on the connector would suffice .... :dunno
qrz
-
I don't think I ran composite sync. I can't remebmer it's been so long and my board I mounted in a project box to keep it clean. I'll crack it open tomorrow and see if I can verify what I did.
-
Nope, I'm using RGB input from an arcade board.
Unless this is defective out of the box, AFAIK I've hooked everything up correctly!
-
I've got one at home that I have sucessfully tested on a standard rez pcb. If I remember, I'll look at it tonight. I don't think i did anything special to get it to work.
-
http://www.bit-tech.net/modding/2004/07/07/psone_lcd/2
I wired mine exactly as this website above shows. Just one ground wire. I wired mine to a 10 pin header, like you would find on a typical monitor PCB, with heat shrink tubing around all of the solder joints.
-
http://www.bit-tech.net/modding/2004/07/07/psone_lcd/2
I wired mine exactly as this website above shows. Just one ground wire. I wired mine to a 10 pin header, like you would find on a typical monitor PCB, with heat shrink tubing around all of the solder joints.
Bah...I've done exactly that. :( I'm thinking it may be bad out of the box. I've triple checked my soldering and nothing's bridged. Still get nothing other than a white screen.
-
That is the same page I referenced for mine as well. Seemed pretty straight forward.
-
Bummer. Does it work with any other sort of input? I think if you don't have a PSOne to test it with, you can use a camcorder style input that has video and audio on the same plug.
Also, are you sure it's the US version? I think I read somewhere that the Non-US version needs an additional 5volt input or something like that to work. Did you try the brightness control?
-
Well, I bought it @ K-Mart in the US. And yes, I hooked up the 5VDC line that turns the unit on. That's what makes it come on white.
I don't have a PSOne.
I might be able to scare up something I can use to input composite with. Maybe. I'll check around.
-
So I plugged the unit into my DVD player to get a composite signal in. Same white screen.
Thinking that I got the wires backwards on the back of the DVD player I swapped them. Same thing.
Luckily I have another LCD unit, so this time I plugged it in without hacking it. It fired up, I could read the onscreen display. I could not get any video to display, no matter what I did.
For kicks I hooked the original one back up, and for a few seconds I got the onscreen display. Then it went back to the white screen. :dunno
-
I've been using a straight connection from my wall wart to the DCC line to get this to fire up. This time I tried using +5VDC from the 7805 onboard using this trick:
http://www.forums.benheck.com/viewtopic.php?t=469&start=17
Now I can get it to fire up each time, but it won't display anything, even with the AV in jack. I do have onscreen display, which is good, but I can't figure out why it won't display anything else.
-
dont know if this makes sense,
the signal that is being sent to the screen, have you booted it with the screen on or, with the screen off then turning the screen on whilst receiving a signal.
what im suggesting is does it matter to the display when it receives the initial input signal?
-
dont know if this makes sense,
the signal that is being sent to the screen, have you booted it with the screen on or, with the screen off then turning the screen on whilst receiving a signal.
what im suggesting is does it matter to the display when it receives the initial input signal?
It does not.
I'm thinking I'm using the wrong composite cable into the unit. I checked out the pinout and don't think the cable I have works. Weird, because I was sure I'd used it before.
I'm not even getting audio.
Tomorrow's another day.
-
I was right - the cable I used must not have the right pinout. Weird that I wouldn't get ANYTHING, though.
RGB works fine now! Along with whatever problems I was having before I had the sync signal on the wrong pin.
First shot is my test bench PCB Tetris that I use to troubleshoot standard res monitors.
The second was the reason I set this up to begin with: a Galaxian board that doesn't have a sync signal. I was having to take it into my kids room every time I wanted to test it (there's a converted Galaxian in there with the original harness intact).
-
I'm glad you got it all sorted out. These screens come in VERY handy for testing boards because they are so easy to cary around. :cheers:
-
I don't know how/what I screwed up the first time around, but everything seems golden now. :)
My next challenge is to make a standard harness that you can plug right into. I've got one on there now - kinda. The goal is to have it completely enclosed in the shell. I saw one guys example, but there was no show on how he oriented everything in there. I may just remove that PCB since I'm not using it for a PSOne and solder directly to the wires. That would free up a lot of space. Not sure how I'd mount the header though. No solder points to adhere to.