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Pleiades Arcade PCB Repair Part 2 / Phoenix Part 4 - RAM issues, Clock issues
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- čas přidán 15. 04. 2022
- This is the final part of the 4 parts video series repairing a package of non working Phoenix and Pleiades PCBs which I got off of ebay. In this part the final board will be fixed and the final board acually holds all new problems that the other ones did not have. Enjoy!
This was a fun series of videos with lots of helpful info. Hopefully you can do more like this soon 🙂
Thank you very much!! Yes this series of videos turned out quite nicely. Already looking into the next repair/vid right now... ;-)
That was a wonderful series =D Really enjoyed it!
Thank you! I think the repairs turned out really well... this set of 12 dead pcbs turned out to be a treasure! sometimes packages like this can be 100% junk - got lucky this time... ;-)
Congrats, great job! This was a fun series and you're a fantastic trouble-shooter.
Thank you very much!!!
Hi. You mentioned in one of you comments, that you have some unsuccessfull repair videos.
Please upload them aswell. Would be fun to watch.
at least i have one unfinished centipede repair.... i will recheck what i produced this far and see if i can make a fun video out of it...
You can buy those music/melody ics from Ebay, Cant think of the number off hand but there common to find and they are use in doorbells
Great tipp!!! I actually did buy the repacement melody chip - so I got 2 pleiades with sound running... ;-) thank you!
Thank you. I really enjoy your posts.
Thank you very much!!!
Nice Job 👍👍👍👍
thanks mate!
This was amazing. Thank you!
Thanks for posting. Great video!
Thank you for watching!
Another great video. I wonder sometimes would it be a good idea to put heatsinks on the ram chips of the more expensive boards to keep them running as long as possible. It couldn't hurt, I suppose! Some of the boards that are selling now go for hundreds of euros.
Yes, that is actually a great question. Sometimes there are certain ics that seem to run quite hot - so much that they even leave some like scorchmarks on the pcbs. But how could you attach a heatsink - with a special tape of some sort?
@@christophzett I've used small heatsinks for something else and they came with what closely matches standard double sided sticky tape! Just a little thicker and much stickier. They can be glued aswell with a specific heatsink adhesive. And they also come with double sided foam tape stickers. So it's really down to yourself whichever method you prefer, I suppose. I think the sticky tape option is the one I'd go with though. I only suggested this for the rare and valuable games. Don't think it's worth the bother for everything. But it's all subjective, huh.
Good job. Really enjoyed these. What's the next project?!
I got a dead super cobra by konami and a dead dig dug by atari...
@@christophzett Nice!!
I would like to see you use the logic analyzer to troubleshoot bad RAM chips to learn how to do it. Try to take out the logic analyzer soon
I do have one video online in which I use the logic analyser. it is the double dragon repair board #2
@@christophzett It would be nice to watch you test good IC chips and bad IC chips using the logic analyzer to know how to troubleshoot various IC chips on arcade games
The working PCB has a number of wires running across the board. Is this just due to broken tracks, and if so, can the tracks be fixed and remove those wires?
Ah, good point. I forgot to mention it in the vid but the extra wires were actually added when the board was manufactured, so they are actually "factory original". They seem to compensate for some errors in the pcb layout that centuri made. Interesting, isn't it? I had this once with an atari pcb before, can't remember which one it was. Well, and I left the wires on because they are original.
That missing sound ic is a chip that has 4 melody’s that it can play. I have repaired my phoenix pcb, that had a working ‘melody’ chip but it was the wrong one. I wanted it to be as I remembered so I searched and found the correct melody chip. Do you know on the pleiades board what chip it needs, because I might have the one you need. If so I will send it to you.
Yes, the Pleiades board need an Epson 7910E melody ic. It's a different one compared to phoenix.
@@christophzett You are right, the ones I have are different. But found some, bought them and when they come in I will send you one. I have an untested 'Lupin' pcb that I think uses the same ic and it might be missing, so now I will have it in case I need it.
@@christophzett I have received my replacement 7910E for my "Lupin 3" pcb. I started work on this board this week and almost have it fully working, just missing one of the sounds, unfortunately there is no schematic so troubleshooting is difficult. Funny thing about this board is that the music can be either generated by the board or by the 7910E sound ic and this can be selected with a dip switch so it's not really necessary. Anyhow, if you want to complete your board, let me know and I'll send you a 7910E.