Recent posts

#11

Buy/Sell/Trade / Re: FS: New Turbografx CD-Rom ...

Last post by NightWolve - 03/31/2025, 03:17 AM

It looks like he's active on YouTube, that might be another way to contact him besides email: jelloslug@gmail.com

https://youtube.com/@jelloslug

#12

Buy/Sell/Trade / Re: FS: New Turbografx CD-Rom ...

Last post by Turbofly - 03/30/2025, 08:45 PM

Hi, I'd like to buy a set of your turbografx case latches.  I live in Newfoundland in Canada, my postal code is A1E6A4. Would you please send me a prices for the latches with shipping? Also, what is your preferred payment method? Thanks.

#13

Console Repair/Mod Center / Re: IFU Backup Memory corrupte...

Last post by elartur77 - 03/29/2025, 12:47 PM

Hello Thesteve, thank you very much for your reply..

This weekend Im going to check all traces and use my logic probe that should be somewhere in home..

I has been busy with work and other projects  but I really want to fix this, Ill update with the results...

Thanks..

#14

Console Repair/Mod Center / Re: IFU Backup Memory corrupte...

Last post by thesteve - 03/29/2025, 01:50 AM

This differs from a DUO in one very significant way (and several smaller ones)
The DUO maps the CD system ram and ROM, where that is handled by the CD system card in this case
The duo uses 1 SMD ram chip for data buffer where the IFU uses 2 DIP package chips to do the same
The sample ram is the same on both

#15

Console Repair/Mod Center / Re: IFU Backup Memory corrupte...

Last post by thesteve - 03/28/2025, 04:28 AM

The lines are evenly spaced, likely a stuck data bit
Test CD player (music)
Should be informative

#16

Console Repair/Mod Center / Re: IFU Backup Memory corrupte...

Last post by thesteve - 03/28/2025, 04:23 AM

Could actually be bad ram
I have run into that before
Obviously check traces
Logic probe is your friend, floating lines don't work

#17

Console Repair/Mod Center / Re: IFU Backup Memory corrupte...

Last post by elartur77 - 03/27/2025, 12:33 PM

Thanks Keith, I hope The Steve could give some help over this  , in the meantime Im going to check that board again for bad traces.

Thanks again..

#18

Console Repair/Mod Center / Re: IFU Backup Memory corrupte...

Last post by Keith Courage - 03/27/2025, 06:40 AM

Those traces are definitely cut on purpose from the factory. So I wouldn't connect them.  I'm lost on what to check next. We need The Steve to comment on this one because I can't remember what trace I repaired to get this working in a DUO before. I'm pretty sure it was a bad trace from the save memory to the larger D91317GD chip, but I can't remember for sure.

#19

Console Repair/Mod Center / Re: IFU Backup Memory corrupte...

Last post by elartur77 - 03/24/2025, 12:52 AM

Hello Keith. Thanks for your reply..

I just check it out and my CD unit is getting power, when I press run button at the bios screen the red PC text turns on, and when I press play just connected to the IFU it appears the track is trying to play, so Im getting power.

Then I check the small PCB and I saw some broken traces (2), they werent visible because the yellow residue of the original flux, but after cleaning they are very evident, but this doesnt seems to be an "accident" it seem to be on purpose because those traces goes to other lines with wires with that gunk to keep them in place, so it seems like they fixed the board with that..

I dont know if I try to connect those traces will fix my problem, maybe I should try, but after checking continuity those traces seems to connect with each other , maybe Im going to short them..

So any other Ideas?

#20

News / [MERGED] PCEFX Reviews, Preser...

Last post by NightWolve - 03/11/2025, 10:41 PM

This topic has been merged into The Brothers DuoMazov 2.0 Returns - 100% Rebooted/Restored!!!!.