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Famicom World

Family Computer => Technical & Repair Assistance => Topic started by: Beaps on March 28, 2013, 03:59:07 pm

Title: Famicon Composite Mod Help
Post by: Beaps on March 28, 2013, 03:59:07 pm
Hi All,

I tried modding my Jap Famicon tonight & all I am getting is this.

(http://img541.imageshack.us/img541/883/img2003f.jpg) (http://imageshack.us/photo/my-images/541/img2003f.jpg/)

I am sure its the transistor they game me is the wrong one. Any ideas what I am doing wrong or where I can get the correct transistor in the UK?

Thanks
B
Title: Re: Famicon Composite Mod Help
Post by: 80sFREAK on March 28, 2013, 04:38:22 pm
Be sure, that your TV support NTSC(60Hz).
Title: Re: Famicon Composite Mod Help
Post by: Beaps on March 28, 2013, 04:41:42 pm
It does mate
Post Merge: March 28, 2013, 04:47:40 pm

I just tried it my Sony PVM also. Sound plays fine, similar image  :-[
Title: Re: Famicon Composite Mod Help
Post by: Pikkon on March 28, 2013, 05:10:43 pm
Just use the transistor inside your famicom and which guide are you using.
Title: Re: Famicon Composite Mod Help
Post by: Beaps on March 28, 2013, 05:17:45 pm
I removed the original transistor, I'm using the 80sFreak mod
Title: Re: Famicon Composite Mod Help
Post by: Pikkon on March 28, 2013, 08:30:59 pm
Post some pics of your mod so we can see if it's all wired correctly.
Title: Re: Famicon Composite Mod Help
Post by: Beaps on March 29, 2013, 02:22:21 am
Thanks for all your help guys, I really appreciate it!

(http://img526.imageshack.us/img526/5231/32316698.jpg) (http://imageshack.us/photo/my-images/526/32316698.jpg/)

(http://img560.imageshack.us/img560/6738/83871716.jpg) (http://imageshack.us/photo/my-images/560/83871716.jpg/)

(http://img577.imageshack.us/img577/1699/73384573.jpg) (http://imageshack.us/photo/my-images/577/73384573.jpg/)

I took the ground for the video from the other side of the board for now
Title: Re: Famicon Composite Mod Help
Post by: Beaps on March 29, 2013, 06:20:00 am
Sorry, not quite sure what you mean. You mean what transistor I am using?
Title: Re: Famicon Composite Mod Help
Post by: keropi on March 29, 2013, 06:23:56 am
^ yep, I take it he wants to know the value of the capacitor and the transistor code you are using
Title: Re: Famicon Composite Mod Help
Post by: Beaps on March 29, 2013, 07:01:14 am
Sure ok, give me a sec
Post Merge: March 29, 2013, 07:53:37 am

The transistor is Bc635 fcb, the one from 22 to 21 says 104z, the one that connects to video out is 33
Title: Re: Famicon Composite Mod Help
Post by: Pikkon on March 29, 2013, 10:18:27 am
Well your using a NPN transistor.I would take out the one your using a use the original PNP transistor and see if that fixes your problem.
Title: Re: Famicon Composite Mod Help
Post by: Beaps on March 29, 2013, 10:23:28 am
So solder back in the original transistor but life leg E?
Title: Re: Famicon Composite Mod Help
Post by: Pikkon on March 29, 2013, 10:40:57 am
Yup.
Title: Re: Famicon Composite Mod Help
Post by: Beaps on March 29, 2013, 10:44:52 am
Oh ok, only solder it to the bottom of the board this time?
Title: Re: Famicon Composite Mod Help
Post by: Pikkon on March 29, 2013, 11:05:21 am
Yes,its all detailed in this guide.        http://jpx72.detailne.sk/modd_files/fc/avmod.htm                                                                       
Title: Re: Famicon Composite Mod Help
Post by: Beaps on March 29, 2013, 04:13:04 pm
Popped the original transistor back in and... I'm dancing!

Thanks guys, the pic has got jail bars but hey beggars can't be choosers I am just great full for some nes action! Lol

Title: Re: Famicon Composite Mod Help
Post by: Pikkon on March 29, 2013, 05:06:31 pm
Nicely done,as for jail bars the best solution is to get some copper tape that has conductive adhesive and simply slide it under the ppu and ground it to pin 20.

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