Counterfeit sn74lvc4245 ICs

[syntax_X]

I had issues with random freezes and sound dying on me which is pretty much why Darksoft was nice enough to post the functions of each SN74LVC4245A group here.

https://www.arcade-projects.com/threads/romset-to-verify-your-cps2-kit.11886/

I had replaced the ICs in question and things got worse, stalling on Q.Sound ram checks now, which makes you think the main boards ram is going.

After putting in real Q.sound roms and confirming the multi was still at fault I ordered in more SN74LVC4245A from a legitimate source this time.

I fit 8 of them and my multikit is pumping again, back to 100% !!!!!!

The ones that arrived this time (from Mouser) had the exact same markings as the original Darksoft kit ones, the counterfeit ones (Ebay) have a bigger logo.

I have a heap of spare legit buffers and can offer replacing them if anyone needs it done.

I do wonder what is killing the SN74LVC4245A in these kits though, as it seems its happened to quite a few people now.

 

[djsheep]

Nice work mate! Also paging @drfunk2k

 

[drfunk2k]

@syntax_X and @djsheep here are my chips.
i have the same problems
let me know what you guys think.

wow this is a GREAT thread. i hope i can get this unit working again.

 

[drfunk2k]

@syntax_X what do you think? could i get some chips from you?

 

[drfunk2k]

ok i found the chips ill update and see how it goes. AFTER, my CPS2 CE multi comes from @djsheep

 

[drfunk2k]

i got my CPS2 CE edition from @djsheep , so it is now a fact that their is something wrong with the multi. I will attempt this repair this week, since I am done with FINALS!

 

[drfunk2k]

OK , so I replaced all the chips as recommended here. the same problem still exist. No sound on roms.
@Darksoft i have exhausted all my options would you take a look at it. sadly this multi is less than 2 years old.
thanks you guys.

 

[Darksoft]

PM me and we'll try a couple of things before sending for a repair.