Recent Posts

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Chit-Chat / Re: Anyone talk about the TGmini here?
« Last post by Necromancer on November 27, 2022, 11:05:38 PM »
I have a mini but don't use it a whole lot.  I know nothing about modding one.
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TG/PCE Repair/Mod Discussion / Re: Turbo Duo Not booting games
« Last post by GTSS on November 27, 2022, 07:17:08 PM »
Sorry to ressurect this topic but the info may come handy to someone that ripped the pads of the C122 cap, I know it happened to me....

So the possitive of this cap goes as correctly indicated above in the picture. The negative goes (through the via) to the one side of R115 (back of the board). See the soldering on the R115 trace?

https://imgur.com/gHfyJFv

My DUO has the R137 but on all I've seen on the web its missing.
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Chit-Chat / Anyone talk about the TGmini here?
« Last post by 420bitgames on November 27, 2022, 02:57:14 PM »
Hello I am looking for hacking info that I can understand to add games to my tg16 mini. I searched but didnít find anything about it. Itís been a while since I posted but wanted to say hello. I sold all my original stuff since I was going hard on cars. But past year Iíve accumulated a TG16 mini, neo geo mini, nes, snes, n64 , GameCube, sega Genesis, Saturn, Sega cd, Dreamcast, 2600, ps1 &2 . Been busy finding them and fixing them. Used to be 420goat. Thanks !
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TG/PCE Repair/Mod Discussion / Re: PC Engine LT video issue
« Last post by herr-g on November 27, 2022, 11:35:33 AM »
Hi,

I'm digging out my old post since my issue is still unsolved.
Meanwhile I've replaced all electrolytic capacitors. It seems that someone before me already did a partial and not so clean replacement, so I did the job again - and this time clean.
Like I use to do with all my cap replacements, I've used tantalum (bigger capacitances) and ceramic caps (smaller capacitances).

But my initial issue is still unchanged: The LT starts with clear loud sound and proper video over the extension port, but the LCD screen stays black, only with the backlight working.


I know similar issues from the GT when the -24V display voltage regulation is defective. But the LT has a slightly different and more complex voltage regulation using a 5291 PWM Converter IC.
I found that Pin 8 on the display flex connector carries -20VDC with the display disconnected (that pin on the image with the wire connected). So I believe this has to be the display supply voltage. However, with the display connected the voltage drops to roughly -7VDC.

I've checked all the traces and vias in the regulation circuit and even replaced the 5291, but without any change. All resistors and diodes / transistors within that regulation area measure normal, and the PCB has been cleaned thoroughly.

I also checked the driver PCB within the display unit. The only suspicious thing I found was three empty solder points that look like intended for a 3-pin diode or transistor (circled in red on the linked image). But I can't conclude why a missing part there would lead to such a voltage drop. as within the regulation circuit on the main PCB, all the parts measure like normal.

Unfortunately I don't have a seperate LT display lying around for a quick comparison.
Maybe someone else here has an idea or can share some experience in measuring the signals on the 5291 to narrow down the issue?
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Chit-Chat / Re: Unable to Recover My Old pcenginefx Account
« Last post by Necromancer on November 26, 2022, 07:26:50 PM »
No problem.   :icon_cat_happy:
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Chit-Chat / Re: Unable to Recover My Old pcenginefx Account
« Last post by herr-g on November 26, 2022, 06:38:20 PM »
Thank you for reviving my account  8)
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Very interesting update!

If I connect a multi tap to the pc engine gt all works great, including the 6 avenue pad in 6 buttons mode...
Is this the way it should work, only using a multi tap?
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TG/PCE Repair/Mod Discussion / Pcenginemods' pc engine gt external gamepad connector issue
« Last post by pipi on November 26, 2022, 01:27:07 PM »
Hi everyone,

I am the proud owner of one of the controller board replacement that were sold on pc engine mods probably by turbokon (if I remember right).

All working amazing until today I finally tried it with an avenue pad, I immediately started street fighter 2 and when I go to the buttons screen and enable 6 buttons it flickers super fast and stops working properly.

Is there anything I can check?

Same pad and game work perfectly in normal core grafx.
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Hi Master and hi to all readers...

Problem is solved!
It was the flat connecting the controller board XD

I replaced the 3.5mm connector for nothing but I am deeply happy it is finally fixed.

Thanks for all the help and all the learning to you and the almighty Keith Courage.

Love this forum and the people contributing to it, you rock!
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Chit-Chat / Re: Unable to Recover My Old pcenginefx Account
« Last post by Necromancer on November 25, 2022, 08:52:06 PM »
Temp password sent.  Welcome back!   :pcgs:


For anyone else, your best bet for help besides rejoining is to hop in the discord server and yelling at me.  I don't get the help emails, but I'm on discord regularly.
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