Thread: Help with PSONE LCD mod

Not sure this will be of use, but here is one of the internals.

Bottom to top this time...the # and colors or wire...I don't know each wires purpose (sorry)

Yellow wire and black wire (hard to tell its even there). Black is earth/ground leading to PCB from 12v power jack. Yellow comes from same solder point as black wire connection on pcb and is solder'd to metal bezel of lcd (more grounding I believe).

Going up the image virtically, is a 4 pin connector with wire white-white-green-yellow (bootom to top in pic). All 4 wire attach to the main lcd pcb and originate at the small switch pcb mounted to front plastic bezel (on-off and game-AV).

Continuing upward and around corner edge is a 6 pin connect with (left to right now!) pin 1 red, pins 2 3 & 4 empty, pin 5 black and pin 6 white.

red wire on this connector goes to (what appears to be) the switch selector pcb for game / av. Black wire on pin 5 seems to go to switch pcb on / off. White is going to speaker lead.

This is the pcb from where power and out bound jacks go....input 12 pin connector (which goes into ps1 consule) is not shown very well....just a grey cable in background).



For this image (and you can't see it, but the board has RGB stamped on it), I will go bottom to top if image viewed without rotation.

Black TFT-Monitor (Power-12v), Yellow Game (Power 7.5v), Grey TV Out connector 12-pin, Audio (listed on pcb) this correspoinds to AV/DVD and VCD label on back of bezel. Lastly is Phone (pcb label)which correspond to "audio" on back bezel.

directly behind pcb labeled jack for audio is a 5 pin connector on the pcb which (top to bottom) has pins as follows:

red-black-blue-brown-purple...these wires all go into a 8 pin connector on the switch selector pcb (top).

The last connector is behind the "PHONE" pcb labeled jack. This one is (lef t to right!) pins as follows:

grey-yellow-orange-green-white.

I know green and orange are for speakers. Grey, yellow and white go to the switch selector 8 pin connector...which is on the top of switch pcb.

This is about it I think...

Hope this makes sense you guys...

Mage....not sure what a "reg" connector is? Could you please explain?

I have simplified the lcd wiring a bit by removing the audio wires and pulled the rest of the plastic case/bezel off.

Got a couple question though (hopefully more concise than above).

1. Both vga cables I have are missing pin 9 (DCC) on the video card side. How will I be able to send the +5V needed to tell the lcd to wake up (got nothing to connect to pin 10 on PS1 header),

2. This may sound silly but I will ask anyway. The AV / Game switch on the front of the unit...should this be set to AV when using the 12V transformer? I because I have never seen the lcd working on a ps1 via cig lighter or 12V xfmr so I am really not sure.

Thanks for any assistance guys! I appreciate it.

Ok...found answer to Q1 on starfires web site.

What if you can't get a VGA cable that has a DCC pin? Find another 5V supply and wire it to pin 10 of the PSOne connector. There are 5v references on the PSOne LCD PCB itself, so connect one of these to Pin 10 (and use a current limiting resistor so you don't upset any sense circuits). If you can read German (Thanks to Mesuge who pointed this out, and credit for these mods goes to Metallhuhn and Harald), there's more info on this page: http://www.diy-tronic.de/forum/viewtopic.php?t=644. There are a few additional modifications on that page for reducing the 'redness' of the display and (i think) setting the contrast.

to Me (mind you I have the OFFICAL PSONE screen) Since the output of the psone is RGB then it should work. On your pic of the Controller board it has the Psone plug wich everyone uses to do this mod. I would say go for it. just find out if the lcd is PAL or the other. just wire it up like Starfox has it and you should be fine. if it does not work then we'll know. If you can Find one of the muli wires things that is talkedabout so you dont have to sodor inside so if it does not work you can return it. if you need help please post or pm me again. I'm busy running 3 corps but have time to help if I can. though I do say go and find you a Geforce 2 or a TNT2 since they are KNOWN to work for this mod.


Mage

Thanks Mage!

I did some more playing....learned a bit about soldering also ;-).

The screen is NTSC and does connect to the PSOne MultiAV Port. I tested the screen today with a PSOne console and confirmed screen functionality.

I have wired the unit as per mpro's site and also using starfox's method. I have also , in turn, tried the inverse of each in case I had pins 1 or 12 backwards when used as point of reference.

PowerStrip is 3.45 and I have tried it with the C-Sync, Interlaced and Green Sync with Matrox Millenium II at 640-480 (Arcade). ....NO LOVE :-(...I got pixel clock down to 30.68 but got no signal at 4" LCD.

Also tried with my GeForce 2MX 32 (no C-Sync or Grren...only Interlaced).

Still NO LOVE. I suspect 640-480 can't render on this guy because hardware won't allow it.

Also, I did confirm to display...selector switche for GAME / AV must be set to GAME. I am still not sure if only the 12V input is needed or 7.5v and 12v together....tried it both ways...nothing seems to work.

Oh Well....I can always snag a 5" Sony I suppose.


EDIT -- I ot my pixel clock setting reviersed


13.68 was Matrox card.

30.something was on the GeForce.....everything else is correct.

the multi av port has rgb, s-video, composite and stereo signals.

you can use a multimeter to test whether the rgb pins are passed into the screen.

also i was able to switch the lcd screen on without the dcc pin. i m using mpro 's diagram.(300 ohm resistor btw green and v/hsync.