Hello I know these have had many posts on here but i am stuck and in need of help. I have the LCD and it is all stripped down. I have a matrox mystique installed in a PCI slot, set as primary in bios and it works when i have a CRT connected, my AGP card is primary in windows and also works ok with CRT attached. I have gone the VGA route for the LCD, I have the 6 wires soldered to the LCD PCB, all done by some one else that can solder unlike my self. I have tryed to solder a D-Sub to the other end of the cable which 'Looks' ok but i know that means nothing with soldering, so i plan to get this re done by the person who done the other end. When i plug the LCD into the matrox i get nothing. I have an extra wire added to the LCD from the DCC pin on the board to a certain leg on a mosfet on the back of the board, this is supposed to force the screen on, It is sort of working, when i first apply power the backlight and screen come on for a sec then go off again. Should i need this extra DCC force wire? Power strip is detecting both graphics cards, when i try to adjust the monitor (LCD) from the quick setup i get DCC communication failed, is this normal? or if the LCD is wired correct will this work? I am hopeing my problems are down to bad soldering on the VGA plug but untill i can get someone else to re do it im not sure. thanks Keith
Is it a PAL screen, and have you got the correct power supply for it (3000mA 7.5v IIRC)? What happens when you plug in just the power connecter with the signal cable left unconnected? I'd also check all the wires are going to the right pins. Welcome to bit-tech, hope you get it sorted soon
It is a pal screen and i am currently useing the power brick that came with it, once it is all working i plan to use the car adaptor and power from inside the PC. If i remove all my work so it is 'as from the box' and plug the power cable in i get a very very slight flicker on the screen, If i connect my DCC pass through wire from the DCC pin on the PCB to the mosfet on the back and then add power both the screen and backlight come on for a sec then go off. All wires on my VGA cable are going to the right pins, The only thing i havent done which i have now read about is extra ground wires on pins 10 and 4, i currently have 3 grounds from the VGA cable all connected together into the one wire on the LCD, they are pins 6 7 and 8 on the VGA to pin 8 on the LCD. Thanks for the welcome.
This picture shows how the DCC pin should be soldered: When it is connected, the screen should power up and stay lit even with the signal cable disconnected. That was the only additional soldering I did, grounding the pins does not seem to be neccecary
well i didnt have the DCC pin attached there it was to the left leg on the mosfet in that picture, but i disconected it and added it as you have, same result, powers on then off. I have just stuck a multimeter on my power block, it is only giving 6.5V could this be the reason? i have read other posts about lack of power.
I just checked mine, it is rated to 7.5v 3000mA, but when I put a voltmeter on it it reads 7.73v. Yours might be underpowered like you said, although it's unusual that it's not performing like it should Have you got any other way to power it that you could try?
well untill now i am useing the mains plug, that is what is reading 7.5v. I have a car adaptor that once the screen was sorted was going to power it from inside the PC, as i havent modded it yet i might stick that in the car and volt meter it. after that i will have to mod it and try it from my PSU, as that is the way i want to power it in the end if it doesnt work from there i really am stuck.
Sorry to hijack the thread a bit, but i've got the same setup, pretty much exactly, i've got the screen working and a crystal clear pic, but i can't get rid of the 1cm lines at the top and bottom, anyone know which powerstrip setting affects these directly?
Hello Big_Adam i guess you are the same Big_adam i am talking to on custom pc? westovski i think it is the csync that produces those lines, if you tick the csync option in power strip i think it should remove them.
http://users.adelphia.net/~agent.aaron/lcd/1.html see the making, and beware, do not expose the open circutry on the lcd to any metal parts on the compter when both comp/lcd are powerd on.
My power supply is not under volting after all, i think my screen/pcb is damaged and i think i know how it happened if it is, but some more investigation to be done before i write it off yet.
Can some one check the back of there pcb for me? at the top near the pink and white wire plut, there is an LED labelled on the board LED1 slightly further in there is a label LED2, is there an LED there? thanks
Ok no need for the check i found a pic all is in order there, So i have found out the power suplly is ok, I trace it back to the socket on the main PCB and there is still over 7.5V therebut were to go after that i really dont know, both the + and - contacts from the socket go to the back of the board, the 7.5v is labelled there, i guess any - from the board will do from here, just need to follow the 7.v line around the pcb untill i find the problem. Unless anone can think of anything else to check, I would really like to find and fix the problem if i can rather than just bin the screen and get another.
Right i have stripped it right down, the screen itself is now sat safe in a box, i took the light box apart not much in there to look at, the issue is definatly to do with power to the light by the looks of it, with the light (white/pink wires) disconected the little green LED still flashes on then off when power is applyed and the DCC bridged, it does the same with the light box connected, this is all with out the screen connected. i have traced a few bits around the board with the volt meter and can find no problems but i really dont know what i am doing. I am guessing the screen may be ok, and if i get the VGA wireing finished it may work, but what will you see on the screen with no backlight? will the screen even work if the backlight does not? I am going to look at giving the PCB to some one that knows what they are doing to try and track the fault here, Is that green LED just an LED or is it some sort of fuse or something? Thanks
i've dealt with this screen beofre and had to repare it numerous times so i might have the solution. maybe you blew the fuse without noticing it. here's the fuse to bypass if you need to: there's also this you could do if the video isn't working: also make sure everything else is connected right, here's the screen pinout . also, doesn't the psone screen RGB use a different frequency than VGA RGB?
I have checked those points and they are fine, thanks anyway daguuy. Is it possible to get hold of a datasheet / curcuit diagram for the LCD or have sony kept it locked away nice and safe? The way i see things now, the components on the board must be working as power applyed turns the light on, even though it is just a couple secs. If there was a dead component it wouldnt work at all? The screen and light unit are seperate, the DCC line turns the light on, but what does it do for the screen? I need to get the PC end of my VGA cable sorted and try to get the screen working regardless of what the light does. If this works i can always find another way to power the light, that should be no problem. Does any of that make sense?
I didn't think that the PAL screens were capable of the VGA Mod...? The C-sync -to- Hsync/Vsync from the vga card is a ntsc thing. since PAL screens use a different sync format... Would'nt be the first time I was wrong... I wanted to use a pal display since they are natively better resolution but I defered to the NTSC types for use with the VGA mod. the (US) PS1 pin 8 is "sync" described as "NTSC Video Sync". Toss the lighter adapter and use an LM317t to reduce the 12v molex to 7.5v (.01mfd cap - 1mfd 50v dc cap - 220 r - 1000 r) and a heat sync ifin ya think it necessary. Cost me close to nothin' like 5 bucks to build one. Still won't do bios screens and powerstrip is the fiddlin' on the mod... you can just defer to the composite input wiring up an svideo adapter if your card has one. Post up the results when you finish it off 'tho
My mate had a similar issue with his PS1 screen... - In his case, it was because he broke the connector for the LCD's ribbon cable, and it wasnt making good contact any more... Might be worth another look there (Though I'm sure you already have) If you're testing this using the VGA connection, I'd suggest going back to a normal composite input if you can: At least it eliminates one other potential cause.... Good luck... Gonna strip mine in the next couple of weeks!
Did he manage to fix the problem? if so how? I was going to test via s-video today, got my hands on a cable to go from screen to RCA, add an adaptor that i thought was from my graphics card for the last link from card to RCA, unfortunatly it does not go into my graphics card so now have to get my hands on another adaptor. As for connecting to a playstation, am i right in saying they only connect to a psone not the original playstation?
