OMG! PSONE SCREEN DISCOVERY!

[Triton]

exactly as i was thinking old chap, jolly good!

[Gamelver]

yes....good....jollies......


. which chip is the chroma encoder, though, segasonicfan? I could maybe test it, if you can't/didn't .

[superdeformed]

http://users.raketnet.nl/darkfader/=%3E ... 526NFH.pdf

There's the datasheet for it (from segasonicfan's S-video post). It says 12mA typical for the 7.5V input, but that doesn't mean it's not in use by any of the supporting circuitry. You could try and power just it with 7.5V, but unless you have a small iron (tip) and really steady hands, you're gonna have a hell of a time doing it. An alternative to that would be disconnecting all of the regulators from the 7.5V line and replacing them/powering them with something else.

[Harshboy]

ok, you know on the board there are the ps1 in and out ports, and then theres the green headphone thingy and the black headphone thingy....which one of these would output to headphones? and can i just connect left/right audio and ground to it to output...like an RCA port to the headphone adapter? Confusing, here's what i mean:

[Gamelver]

http://users.raketnet.nl/darkfader/=%3E ... 526NFH.pdf

There's the datasheet for it (from segasonicfan's S-video post). It says 12mA typical for the 7.5V input, but that doesn't mean it's not in use by any of the supporting circuitry. You could try and power just it with 7.5V, but unless you have a small iron (tip) and really steady hands, you're gonna have a hell of a time doing it. An alternative to that would be disconnecting all of the regulators from the 7.5V line and replacing them/powering them with something else.

eh, I would just cut the traces leading up to whatever pin it is and then solder it back to the pins when I'm done .

but replacing the 7805s does sound like a better idea. Well, actually, it'd be best to have BOTH (if you need it), but whatever. most portables use 7.5V, though if you could use 6V you could have couple more batteries and double the battery life (roughly ...).


in response to harsh's post:
the green's for the headphone, the black's the AV out/in jack. here's how to wire it.
1. on the right side of the whole thing there should be a long metal strip. with the holes facing you and the PCB/pins on top, you wire the right audio signal to that metal strip.
2. on the left side, furthest away from the holes is the left audio metal strip. wire to that.
3. in the middle on the left is the video pin. wire to that and then make sure you have ground between the two systems.
make sure you also use the cable that connects the headphone/AV in/out jacks to the screen. it'll automatically have AV and the headphone pins connected, plus ground if you need it.

[Harshboy]

thanks.....i thought it was the top one, but i was wrong......O well....now i know.

EDIT: So is this right? And for headphones, i would plug my headphones into the green jack right? Or do i plug it into the black jack? BTW, i'm not gonna use the video pinout, i already did that.....here's my pic of what I got from your description:

[Gamelver]

yup, that's right....and yes, the headphone jack is the green one, as I said before .

[superdeformed]

eh, I would just cut the traces leading up to whatever pin it is and then solder it back to the pins when I'm done .

My main point was that it would be a little difficult soldering to the pins on the IC . Anyways, if you decide to give it a try you may have difficulty reconnecting the trace directly (unless you cut it carefully), as the signal from Vcc2 (7.5V in, pin 20) goes out about 1/16 of an inch then straight to a via. I followed the trace and it comes from CV37, so that would be the place to reconnect it if you cut it .

[Harshboy]

I suppose this will still work with mono, cause as of now i only have 2 rca jacks (one is being used for video) I hope to get another rca jack soon.....i'm sure i have some spares around here.


EDIT: It didnt work! argg......

[Gamelver]

eh, I would just cut the traces leading up to whatever pin it is and then solder it back to the pins when I'm done .

My main point was that it would be a little difficult soldering to the pins on the IC . Anyways, if you decide to give it a try you may have difficulty reconnecting the trace directly (unless you cut it carefully), as the signal from Vcc2 (7.5V in, pin 20) goes out about 1/16 of an inch then straight to a via. I followed the trace and it comes from CV37, so that would be the place to reconnect it if you cut it .

yeah, there's usually some component you can wire too . and I've successfully soldered to a couple pins on the IC. so there, I CAN do it!!!

anyway, I may try it later, then, if I can risk a PSone screen...for now I'll be content with the draw of the screen, though perhaps for a later project, when I'm not so busy with other stuff, I'll look into it (and into making the screen smaller....I know it can be done, but I think I missed some traces ).

oh, and can anyone supply a diagram for the amp on the PSone screen? I've searched before but have found nothing, really....sometimes a speaker doesn't work or something and it'd be A LOT easier to trouble shoot with a diagram of the amp .


finally...sorry to kind of hijack the thread, harsh. I have at least tried helping you, though .

[Harshboy]

Yeah, that's ok........I'll just go buy one of those adapters...i think i can spare 5 bucks or so. I mean, Wal-Mart would sell one right!?

[GamingRev]

A lot of "older" systems (and there screens) were made to be overpowered. It said something like that in bens book.