Nesp Almost Complete...NEED HELP!

jeff19 · Post by **jeff19** » Tue Nov 29, 2005 8:12 pm

Wow lucky bastard! I very well could have the same problem you're having, or HAD, a bad 7805 on the NES motherboard. Do you know how to test that component individually so I can see if its shot or in working condition?

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 8:14 pm

get your multimeter and test the ouput pin for 5 volts when yopu have power running through it

jeff19 · Post by **jeff19** » Tue Nov 29, 2005 8:16 pm

So I would put the negative tester on the ground? and the positive tester on the +5 volts going in or out? which one does the positive touch to?

minkster · Post by **minkster** » Tue Nov 29, 2005 8:20 pm

jeff19 wrote:Wow lucky bastard! I very well could have the same problem you're having, or HAD, a bad 7805 on the NES motherboard. Do you know how to test that component individually so I can see if its shot or in working condition?

Hehe...also make sure you have all your grounds connected

You will eventually get it working properly.

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 8:36 pm

check both maybe you dont have any voltage even going in the thing

jeff19 · Post by **jeff19** » Tue Nov 29, 2005 8:42 pm

Ok I tested and yes I do have nearly 10 volts going in to the 7805 on the NES motherboard. And I do have +5 volts coming out of it, so that component is good. I also tested and have +5 volts going into the motherboard (frmop the 7805). However when I tested the Video OUT port on the NES motherboard (going to the left PC board) I only get about 2 volts. Is the video OUT signal supposed to be +5? If that is lower than it should be then I can re-solder that and maybe that will deliver the power I need to get a video signal. Does that sound right to anyone?

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 8:51 pm

test i dont know did you rebuild the video board like ben said in his book or what?
a diagram or pic would help me know what you are talking about

jeff19 · Post by **jeff19** » Tue Nov 29, 2005 8:54 pm

Yeah I followed all the diagrams and instructions in Ben's book exactly. All the parts are identical to what he used. What do you want a pic of? I'll get you anything you need to see what's going on

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 8:56 pm

sure pm me some pics of your work and i will try and help you out o and big pics are good because i have cable internet

jeff19 · Post by **jeff19** » Tue Nov 29, 2005 8:58 pm

Ok ill go take some now, give me a bit and Ill PM you with them.

Turbo Tax 1.0 · Post by **Turbo Tax 1.0** » Tue Nov 29, 2005 9:01 pm

i'll try and get back to you tonight make sure to give me some details too

minkster · Post by **minkster** » Tue Nov 29, 2005 9:14 pm

Hey jeff, I think you should make your own thread on your NESp stuff, and if you need help you can PM me too

jeff19 · Post by **jeff19** » Tue Nov 29, 2005 9:35 pm

Sorry man didnt mean to horn in on your territory!

Actually I do have my own thread, I posted it in the Hacking Videogame Consoles - The Book forum, before I realized there was a separate NES forum

My thread is Newbie needs troubleshooting NESp connections, screen, video. I'll stop posting here and start posting there. Good luck with the rest of your NESp and I'll see you in the other forums then!

minkster · Post by **minkster** » Tue Nov 29, 2005 9:38 pm

Naah your not intruding my thread at all, you can post a new one in the NES forum, or ask one of the mods to move your original thread to the NES forum

mattb419 · Post by **mattb419** » Tue Nov 29, 2005 10:26 pm

hey everyone, long time no post for me (been home for the thanksgiving). anyways, I've been helping minkster for a while now on his nesp. A couple weeks ago he asked me if I would take a look at it, but unfortunately it didn't get here until after I had left for home. without further rambling from me...

he had a lot of it done himself. The main problems were the shot 7805 that has been mentioned already, and a couple cold solder joints in the ground wires. also, just a couple little spots in the controller that needed tweaking, but nothing too major. all in all, a really nice job for someone who is completely new to working with electronic projects like this!!!

...I shouldn't post when I'm tired, I ramble too much

-Matt