FW needs some hight quality pictures of modded Famicom boards for an upcoming article(s). We're looking for the three round-button models:
HVC-CPU-06
HVC-CPU-07
HVC-CPU-GPM-02
You can see some lo-res images of the chip-side of the boards in this article:
http://famicomworld.com/workshop/tech/square-button-famicom/ (http://famicomworld.com/workshop/tech/square-button-famicom/)
What we're looking for specifically are the pin-sides of the boards that are already AV modded. Please include the main board as well as the RF board in the pictures. The solder points should be clearly visible (this includes having the RF metal boxes removed where applicable).
High quality shots of un-modded boards and/or chip sides of boards are also appreciated, but are a lower priority.
We appreciate the help! Thanks! ;D
http://yoshikiyoshiki.hp.infoseek.co.jp/AVFC.html
I have some high quality HVC-CPU-GPM-02 pictures on my site - unfortunatelly UNMODDED:
http://jpx72.detailne.sk/collection_files/consoles_files/con_gallery_famicom.htm
Quote from: cmv2 on May 19, 2010, 02:00:41 am
http://yoshikiyoshiki.hp.infoseek.co.jp/AVFC.html
Thanks for the link, but those aren't really what we're looking for. We want to see the whole board. We also plan on using the photos for our site, which means yanking them off of some Japanese hobby site isn't an option.
Quote from: jpx72 on May 19, 2010, 03:53:17 am
I have some high quality HVC-CPU-GPM-02 pictures on my site - unfortunatelly UNMODDED:
http://jpx72.detailne.sk/collection_files/consoles_files/con_gallery_famicom.htm
Thanks for that. That's the kind of quality photos we're looking for.
I've made some pictures of my modded famicom board HVC-CPU-GPM-02:
HI-RES (http://jpx72.detailne.sk/famiav.zip) - these will be uploaded for 1 month on my site so please download them as soon as possible.
Tutorial and other info here (uploaded indefinatelly):
http://jpx72.detailne.sk/modd_files/fc/avmod.htm (http://jpx72.detailne.sk/modd_files/fc/avmod.htm)
Awesome! Thank you ;D
I have made more hi-res photos of another purchased Famicom - the HVC CPU 07, feel free to download:
http://jpx72.detailne.sk/collection_files/consoles_files/con_gallery_famicom2.htm
But by the way, I've taken down the modded pictures of HVC CPU GMP 02
http://jpx72.detailne.sk/collection_files/consoles_files/con_gallery_famicom1.htm
because I think it's best to make the mod outside of the famicom and a picture with just 4 wires connected to the PCB isn't what you're looking for. I am not going to drill holes to the casing or solder the extra components directly to the board.
Excellent, thanks. I saved off the shots of the first board a while ago, so don't worry about it.
Hiya! Total Noob here!
Recently acquired a HK famicom. Pretty sure its official (Non pirate) and really want to AV MOD (bear with me I am on topic lol). I cant find any info on my board set up ANYWHERE (searched this place ten fold and seemed like the place to ask). It has 3 wires going from the RF board to M board (yellow, orange and red) ending on the at three points labelled D, E and F both sides? So...I wondered if you guys fancied including it in your tutorial and helping me out at the same time!? Board Model = HVC-CPU-NPC-18-01 I can send pics but dont have my cam atm.
PS am I right in thinking this model has AV built in but no socket?
PM sent on the HK FC.
@ Joe: Do you still need any photos? I can send you a set of photos with the solder points, using all revisions of the FC board, and multiple locations (user selectable) as examples if you want. I need to take them anyway to include with a manual.
We're still looking for pics of the HVC-CPU-06 board. Really, though, pics of any and all models would be appreciated. Thanks!
OK. I have the Rev-06 and Rev-04 boards to photograph. You didn't mention the latter, but perhaps you missed my photos of it some weeks back. Feel free to add the to the site if you want.... As I mentioned, they're free to use on any information page, as is the photo set of the FDS Rev-p03 power board.
I also have a variety of the VCCi Famicoms (the GPM version) and I have one rev of the HK version.
I'll put something together for you as soon as I'm able. :diskkun:
Here is link of image of modded pictures of HVC CPU GMP
http://jpx72.detailne.sk/collection_files/consoles_files/con_gallery_famicom1.htm
I hope you gona like that.
Thanks for the effort, but please do read the thread before posting. Jpx72, the author of that page, has already posted a link to that a few posts upward.
Hi I got a new acquisition, HVC-CPU-03 - should I make some photos or do you already have those?
Don't have that one yet. Photos would be much appreciated :yoshi:
https://picasaweb.google.com/104600295437428529732/SquareButton?authkey=Gv1sRgCKnWhd_GhrKDhAE
What do you think?
Got 'em. Looks good to me ;D
Quote from: jpx72 on September 03, 2011, 01:00:00 am
https://picasaweb.google.com/104600295437428529732/SquareButton?authkey=Gv1sRgCKnWhd_GhrKDhAE
What do you think?
Dear god thats a heavily smoke stained famicom :help:
Is the AV Famicom really worh it? I already got a Twin Famicom and i'm really tempted to trade it, or sell it for AV Famicom cause i really hate the short controller cable :(
Quote from: jpx72 on September 03, 2011, 01:00:00 am
https://picasaweb.google.com/104600295437428529732/SquareButton?authkey=Gv1sRgCKnWhd_GhrKDhAE
What do you think?
Same color as mine! Well until I mix up some retr0brite...
Hello.
Did you get the scan of the HVC-CPU-06 board?
My square button famicom stopped working today (dry solder joint on the power-jack)
First time to take apart but it has the CPU-06 board
http://famicomworld.com/workshop/tech/square-button-famicom/
It is different to the round famicom -06 board listed here are it has two rubber strips each side of the center chip.
Do you want any pictures of it?
Quote from: Terpor on June 06, 2012, 12:29:50 pmIs the AV Famicom really worh it? I already got a Twin Famicom and i'm really tempted to trade it, or sell it for AV Famicom cause i really hate the short controller cable :(
Damn I have an RGB modded AV famicom, but want a Twin Famicom since I am an FDS fan, so I feel your pain! Having SNES controllers connected to my AV Famicom is sweet!
(http://i1056.photobucket.com/albums/t364/arb2261977/P1010511_zpsd9ece7b6.jpg) (http://s1056.photobucket.com/user/arb2261977/media/P1010511_zpsd9ece7b6.jpg.html)
I have both a Turbo Twin and an AV Famicom and i'd never part with either. Probably need some new pads for the controllers in the Twin but its a great talking point and extremely convenient to show off Famicom games at events (cause it only needs one power supply)
Sorry for the bump, but I don't think anyone ever posted it– my fami's an HVC-CPU-06 that I successfully AV modded. You can treat it exactly like a -07 board, though, for the purposes of the mod. Not sure if it's exactly what was asked for, though, since I replaced the whole RF modulator board on it.
I used the AV famicom diagram for the video portion, but also replaced the original power supply board. I'd recommend future modders not do that; it's more trouble than it's worth and I don't think I used a big enough heat sink.
AV mod:
(https://i.imgur.com/TTRp2Km.png)
Click the pics for full sizes.
(https://i.imgur.com/QHJdZw2l.jpg) (https://i.imgur.com/QHJdZw2.jpg)
(https://i.imgur.com/AQAO5eGl.jpg) (https://i.imgur.com/AQAO5eG.jpg)
I ended up adding a tiny electric fan because of the cooling problem with the FDS ram adapter attached (heat sink too small), but here's a picture of the perfboard without the fan circuitry.
(https://i.imgur.com/FXRxLJYl.jpg) (https://i.imgur.com/FXRxLJY.jpg)
There's nothing remarkable underneath since I lifted pin 21 on that console.
If you want to see one where I did, my -07 used a similar concept, but I added the video amp stuff to the original rf modulator instead of replacing it. The only difference between the -06 and -07 mainboards is the surface mounted SRAM of the -06 board. Positioning of all other parts and non-RAM-related traces is identical. I actually modded the RF modulator I desoldered from the -06 for the -07's AV mod, since I could work on that before taking out the original part, so what you're looking at is the RF modulator of a -06.
I did not lift pin 21 on this console, but I did perform a cut which is mostly obscured by the wire leading off the pin. I also did a cut to the trace leading to the destination point I soldered the other end of that wire to. The result is passing the un-amplified signal back to the RF board (where I also cut the video input line) via the original set of wires (the "ribbon").
(https://i.imgur.com/8SO7IMNl.jpg) (https://i.imgur.com/8SO7IMN.jpg)
I used a 2N3906 instead of the 2SA937 transistor on this board. It's mounted upside down for height clearance, along with two series resistors adding up to 300 ohms and the 220uF capacitor.
(https://i.imgur.com/iTJbayAl.jpg) (https://i.imgur.com/iTJbayA.jpg)
Used the RF switch RCA jack for video out, and the TRS jack for dual mono. Superglued it down, using hot glue blobs to hold the TRS jack in place while the superglue cured.
(https://i.imgur.com/dPOxdq8l.jpg) (https://i.imgur.com/dPOxdq8.jpg)
Bonus
(https://i.imgur.com/tB9c5IYl.jpg) (https://i.imgur.com/tB9c5IY.jpg)
I hope this is helpful, despite the unorthodox steps I took in modding my -06… Sorry for the bump if not.
I'm not sure if pictures are still wanted, but I don't know, this thread is still a sticky.
Thanks for the pictures anyway, the custom power board was fun to see. :)
I think the latest recommendations (https://forums.nesdev.com/viewtopic.php?f=9&t=18508) is to not lift pin 21 retaining RF output, no copper foil and put a tantalum capacitor between 4.7 to 47 µF on PPU pin 20 and 22 (which is RESET, but also +5V on Famicom since Famicom never resets the PPU unlike NES). I'm not entirely sure though.
Edit:This AV-mod circuit seems to be the result of the latest research (https://forums.nesdev.com/viewtopic.php?f=9&t=18508&start=75#p237597):
(GND)
PPU.20 ----------------+---------------------------------+--------+
| | | | Ring
| | / (c) 2SA937 560pF --- +----O } Composite
| PPU.21 --|< PNP Ceramic --- } Video
| | ^ (e) 220uF | +----O }
--- 4.7-47uF | Electrolytic 110 | | Pin
--- Tantalum +----------|(---------/\/\/-------+--------+
|+ | +
| (+5V) 300 |
PPU.22 -------/\/\/----+
According to that thread it's basically the AV Famicom's circuit, plus a tantalum capacitor (anything from 4.7 to 47 µF) between the PPU's +5V and GND, minus a ferrite bead and minus a 560 pF capacitor. Tantalum needs to be soldered directly between PPU pin 20 and 22 to filter the noise on the PPU's power rail. No need to cut pin 21 and sacrifice RF or wrapping the PPU in copper foil.
(Caution: This circuit is for Famicom. On NES frontloaders, PPU pin 22 isn't tied to +5V but instead tied to the RESET button.)
hehe mine idea is similar :) ,but I keep all intact :) and use RF as well