I have a famicom with the hvc-cpu-gpm-02b revision board that I moded sometime ago, in order to get composite video. All of a sudden, this particular console decided to stop working. Using my mutimeter I discovered that the voltage regulator and the fuse where blown. I replaced them, and since I was at it, the capacitor. Now all I get is a loud buzzing noise when I turn it on. Is it considered beyond repair? I don't have the skill or the equipment to go further with the repair. I read somewhere that there is a high chance that the cpu or the ppu might be fried.
I double checked everything, along with a skilled friend on electronics. Everything seems to be fine..
Sno, cop some ppu and cpu replacements on Aliexpress, then let us know if she comes back to life, also invest in sockets just in case, makes life easier.
Go buy a ppu and cpu replacement on aliexpress or the like along with sockets then see if it is working after, has happened to me, and worked after a swap.
I have a working cpu and ppu from another dead famicom. I'll try to swap them. Is there a guideline or special measure I'll have to follow in order to desolder the chips? It's the first time for me, trying to desolder ic chips.
Easiest way I find is to run solder along all the pins, at the same time, and pulling on the ic from the other side. Someone might have a better way. Maybe desolder pump each pin
Is the CPU a dip chip? As a beginner I've had much better luck with desoldering braid compared to the pump which was a nightmare but maybe that's just me and my inability to use the pump properly
Interesting, I was desoldering a CIC chip and the pump really sucked at sucking. With the braid I managed to remove every little bit of solder. Certain Snes cart PCBs seem to use a different type of solder which I really struggle with even with the braid.
Yeah, I am not a fan of the manual pumps either, braid all the way. The desoldering stations work pretty well though.
I desoldered the chips using braid (it was a real pain using the pump), but it seems that these spare chips are dead too I did some research on aliexpress, but I'm quite hesitant buying those replacements as they don't seem to be of decent quality. These are the chips I found http://www.aliexpress.com/item/RP2C02E-0-The-new-quality-is-very-good-work-100-of-the-IC-chip/32526705340.html http://www.aliexpress.com/item/RP2A03E-DIP40/32409702670.html?spm=2114.30010308.3.58.DT9E1m&ws_ab_test=searchweb201556_7,searchweb201644_1_505_506_503_504_10033_10020_502_10001_10002_10017_10005_10006_10003_10021_10004_10022_10018_10019,searchweb201560_9,searchweb1451318400_-1,searchweb1451318411_-1&btsid=1d313f97-37f7-46a8-b639-a72f623f3467 What do you think of these?
Bumping the thread. I abandoned the idea of fixing this famicom. Today I came upon a Chinese seller on ebay that sells as a set a (probably clone) cpu and ppu. http://www.ebay.com/itm/DIY-Famicom-NTSC-Upgrade-kit-X-tal-for-free-ppu-and-cpu-/272232503084?hash=item3f6252572c:g:ndoAAOSwwbdWGxRK I already sent him a question if this is gonna work on a real famicom, but I want to get an answer from you guys, as you are more knowledgeable with this kind of stuff My only hesitation is that they are kinda expensive for cloned chips.
I got some clones aswell. (not sure if they work) but these should be pin compatible and functioning similair to the official ones.. But note that there are diferences between official Nintendo ones and these clonese. sound and picture might be diferent. Please double check if the seller got good comments and maybe even buyers saying they are all happy with working chips (from alixpress for example). [edit] Dint read well. You could try, they are usualy pin compatible. But seem a bit expensive, did you try aliexpress? I got a set from ali and should follow the normal famicom schematic to build a nes. But havent yet, so please double check. Do note, the clones have diferent effects on games, and sounds are diferent. its not "that original" anymore with clones.
Tried aliexpres, but never managed to place an order. You see, my country (Greece) is under capital controls, which means I can't directly use my credit card. Tried to contact a few sellers, but the communication was horrendous. I came upon a video on the channel gametechus where Jason tries to fix a bad ppu/cpu on a toploader nes. A guy mentioned on a comment that those aliexpres chips are clones too,and that they are not 100% compatible. Someone else gave the link to this seller and claims that these chips work,without any further info. As for the seller on ebay, he has only positive feedback. From that, only 2 is from people that bought these chips. The guys though commented on how fast they shipped, and that they seem to be on good quality.Nothing on if they work as the original ones. The seller also has a clone famicom board, that claims to be 100% compatible. If is that the case, I believe these chips might worth a shot. EDIT It might be a crappy chip too. This is what gametechus replied Should being the key word. Problem with that ebay part is I was told it has been tried before and was not a proper clone, def not an original Rohm part. Supposedly it too is a PAL version or just junk. I need links to parts ppl know work or are what i'm looking for, non P rev ua6527.
Greece for real? so sad man, aliexpress is awesome. Wish that gets resolved soon checked the video, yes hes right. Dear chinaman has not alott of great chips left. So yes, if the seller is fine (and apears so) and people recommend him/her. try it. But note that generaly I read everywhere that anything but official Nintendo ones have slight or bigger sound diferences and the cpu works diferently. I dont know anymore where ive read it, but they tried diferent clocks and combinations. Should be comparision charts somewhere aswell. And ofcource, are the chips you getting realy PAL or NTCS? are they properly labeled (for a clone) or are they "relabeled" clones (cause ofcourse, some clones are more worth it than others)? Im no expert (yet ) on these clones or NES fixing, but so far if accuracy isnt the isue. buy them (in my case, I got some from Aliexpress and still hope they work, and perform somewhat like the real deal) I got them just for the lolz, but your not I asume. Give it a shot, and please tell people the seller is great if succesfull. I hope I got a UMC UA6527P and UA6538 (the labels say so) and you ment Ricoh ? I think because they have to get them from working nes/famicons... wich is kinda like a chicken and the egg story. but the YT video is I think spot on. http://forums.nesdev.com/viewtopic.php?f=9&t=10729 Some info about the clock speeds (UMC)
I decided to give it a shot and order the chips. I contacted the seller and he seemed to be quite honest. After I ordered the chips though, I decided to inspect once again the broken famicom. To my amazement I found the culprit! A soldered wire was touching one of the ram chips, causing a short. I cleaned the area, and everything is back to normal. I couldn't believe that it was such a simple issue with that specific famicom!!!
