Hi guys, my first post here.
I'm trying to mode an HVC-CPU-GPM-02 Famicom using the following tutorial:
http://jpx72.detailne.sk/modd_files/fc/avmod.htm
But I get no video output.
Here are some pictures of my mod. DO you guys see anything weird?
(https://farm6.staticflickr.com/5649/22730409493_fae023d0ca_b.jpg)
(https://farm6.staticflickr.com/5728/22989674149_9f223ebd98_b.jpg)
Post Merge: November 28, 2015, 12:12:09 am
BTW I'm using a 9v 1200A negative centre Power Supply with an Everdrive cartridge.
The everdrive cartridge seems to work as it has a led that turns on which tells me that the console is also on.
Tried it on my projector as well and nothing. I have Famicom 3 boards, tried doing this mod in all 3 of them and nothing.
I'm thinking and thinking but can't find my error...
I don't use that mod, but this part seems strange, unless I'm missing something.
Quote
Next, solder 150R resistor to pin 22 of the PPU (+5V).
Pin 22 is /RST.
This schematic is from the AV Famicom and has always worked for me:
(http://s17.postimg.org/s09x3pvvv/kyuusaku_zps6a57f5ab.jpg) (http://postimg.org/image/s09x3pvvv/)
Thanks! I'll try that one!.
One question, C of the trasistor goes to ground right?
Yes, the collector is wired to ground. The electrons need to come from somewhere ;D
One question chowder, no capacitors on the other side of the board so jailbards are reduced.
In the other tutorial I seen 2 x 1uf ceramic capacitors used.
Quote from: Pingaloka on November 29, 2015, 04:16:00 am
One question chowder, no capacitors on the other side of the board so jailbards are reduced.
In the other tutorial I seen 2 x 1uf ceramic capacitors used.
I don't bother, they're optional in case the jailbars really annoy you. I just turn the sharpness on the TV down a little and they're virtually unnoticeable to me :)
I used this guide to mode a friend's famicom https://playoffline.wordpress.com/mod/oldfcfba/
and the same as you posted for mine because it is simplest :) http://jpx72.detailne.sk/modd_files/fc/avmod/avmod.png
and it is working , try to bring back the original transistor in place and add one more for the mod
and did not disconnect the original transistor to keep RF functionality :)
an add extra cap for reducing the vertical lines ;)