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Post by amb47uk on Jan 10, 2021 13:55:22 GMT
Hi Guys, Im new here, so thanks in advance for your time in helping out. Big fan of the whole PCE / TG16 systems, I have both a Shuttle PCE and a TG16 in the UK. But I have issues with my TG16 which has colour/graphic scrambling issues from the ext port (when I use RGB solutions, I haven’t got the means to test from onboard AV out) PICS HEREI have tested it with 3 different solutions, a custom RGB scart (from a guy in Sweden?), Terraonion SD3 (with Megadrive 2 rgb scart) and engine block (with an RGB scart), all with the same results… the colours aren’t right and graphics are a little glitchy. Tried genuine hucards, kirkkz Everdrive and SD3 all with same results too. Same results through a framemeister or direct to TV. Ive ‘deoxit-ed’ the back connectors too and taken the TG16 apart albeit the radiation shield is welded tight around the motherboard. My research has lead me to believe it’s a faulty HuC6270 or capacitors. Does this sound about right? I bought a 3rd party power plug for it from retrogamesupply.com (as my TG16 didnt come with one for the UK), could it be a voltage issue? Cant seem to find anyone in the UK who can fix this as its such a rare console over here. My soldering skills are non-existent, and I'm not even sure I can get a replacement sorted. Is it beyond reasonable repair do you think? Appreciate any help Adam
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Post by SignOfZeta on Jan 10, 2021 17:32:41 GMT
Sadly I can’t see much from the screenshot. Can you post a better couple of pictures or maybe a video?
I don’t know the issue yet but I would bet £1 that the root cause lies with the mod and not caps chips or any OEM parts.
TG-16 don’t have factory RGB so there are approximately 234 different home brew solutions and not all of them work with everything. This is probably the issue, or the mod just fell apart inside, or maybe it never worked.
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keithcourage
Punkic Cyborg
https://www.facebook.com/turbografxfan/
Posts: 231
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Post by keithcourage on Jan 12, 2021 12:37:46 GMT
Caps in TG16 systems don't go bad unlike Black DUOs and the Express/GT systems which need to have them changed.
So you more than likely have a faulty chip.
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majors
Punkic Cyborg
Have cabs, will travel
Posts: 158
Fave PCE Shooter: Parodius
Fave PCE Platformer: Legendary Axe
Fave PCE Game Overall: Spriggian
Fave PCE RPG: Ys
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Post by majors on Jan 12, 2021 16:00:14 GMT
OP -> Just to be clear, you can run your Shuttle without gfx issues to compare to the EU TG? Also, did it ever work? Or did you recently get the TG and it had issue out of the box? It does look more like a chip issue, or bad trace to chip.
The only power adaptor issue I've ever had was due to low amps and all that was displayed was a distorted solid color screen, similar to when you have no HuCard or wrong region.
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Post by amb47uk on Jan 13, 2021 16:03:17 GMT
Thanks so much for the info guys, if I recall when I got the TG16, the image seemed to be ok with a Japanese original hucard and video out from the side AV port. Only when I tried to use a krikzz everdrive outputting via side AV port did I get the colour issues. I thought it was the everdrive at fault, but even a replacement didnt sort it, then the engine block didnt, now the SD3 doesnt. (this is over a period of 2+ years trying everything). The shuttle PC engine I have works fine with all the rgb output options i tried (SD3, engine block, bespoke rgb cable) and game input solutions i have (SD3, 2 different krikzz everdrives, victory run original hucard), so I'm fairly certain its not them that is faulty. Yeah it seems to be faulty video chip doesnt it? I read somewhere RGB out was never tested at factory for the TG16 systems, so they could be faulty. I guess its unfixable trash then is it? Thanks again all Adam PS ive boxed it all back up so video isnt easy to take. This is how victory run title should look steemkr.com/retrogaming/@darth-azrael/victory-run-turbografx-16All games i play via everdrive and SD3 have mixed up, slightly glitched graphics.
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majors
Punkic Cyborg
Have cabs, will travel
Posts: 158
Fave PCE Shooter: Parodius
Fave PCE Platformer: Legendary Axe
Fave PCE Game Overall: Spriggian
Fave PCE RPG: Ys
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Post by majors on Jan 13, 2021 19:50:52 GMT
Yeah it seems to be faulty video chip doesnt it? I read somewhere RGB out was never tested at factory for the TG16 systems, so they could be faulty. I guess its unfixable trash then is it? I dunno about the history and lore of the fabled EU Turbografx, so I cannot comment on native RGB functionality. Personally, I find the composite to be fine. Unless you do not own a SD CRT anymore... Most of us are horders here, so you comment "trash it" might offend some folks
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Post by spenoza on Jan 13, 2021 22:29:36 GMT
Who you calling a hoarder??? (glances furtively at several boxes of controllers and cables)
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Post by SignOfZeta on Jan 14, 2021 18:07:33 GMT
It’s not hoarding until it’s Playstation shit. Beyond that point it’s for sure a condition. The Shuttle also had no native RGB, just like the Turbo. It wasn’t “tested” because isn’t wasn’t there. You have modified systems. As for insufficient power supply, it can indeed cause normal-ish running but with bad colors. I’ve experimented in the past with minimum current and TG-16s. In order to see it you’d need a minimum amount of juice to keep the system going. A Core should run off 0.4 amps or even less, maybe even 250mA so you don’t need a huge supply but it can’t be puny either. CD systems need nearly an amp when the laser is moving on the sled but when the CD is running they drop down to nearly Core levels. If you can only supply....let’s say 180 mA then you may see this, running but with bad colors. Despite all the claimed efficiencies of modern chips, every single flash doodad I’ve seen will cause the PCE to draw more current than normal. With the correct system the difference between a Bonk 1 card and an Everdrive is enough to make the system work or not. I think it could be a bunch of things and we may learn something from better pictures or we may just end up talking about it more.
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Post by amb47uk on Jan 19, 2021 13:36:12 GMT
Thanks guys, Just to clarify my shuttle was RGB modded, but I dont believe my turbografx 16 was modded. Heres a video of Victory Run I took: imgur.com/a/fGOFMbXHow it should look: youtu.be/XK9inkpDLg4?t=14Unfortunately Im playing this on a big screen via a framemeister, but ive tried direct scart to TV too with same colour issues. Unfortunately composite is out of the question.
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Post by SignOfZeta on Jan 20, 2021 3:22:11 GMT
That does look like a digital issue. Is it consistently like that or do the affected colors come and go?
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Post by amb47uk on Jan 20, 2021 12:07:21 GMT
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Post by amb47uk on Feb 11, 2021 13:27:20 GMT
Managed to get hold of an official AV cable, and an official PSU, but still same colours issue. Im guessing the video chip is busted, which is well beyond my knowledge of repair. Shame its one for spare parts/repair to sell I think.
Thanks for all your help guys anyway
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