NES vertical artifacts after cuted 4th pin CIC pal ver
Moderator: Moderators
Re: NES vertical artefacts after cuted 4th leg CIC pal ver
Is this with a cartridge in, while it's displaying that artifact?
Re: NES vertical artefacts after cuted 4th leg CIC pal ver
While off, check if something is connecting either 74HCU04 pins 5 or 6 to +5V.
Given that you have two PPUs with the same flaw, I really don't think it's a flaw of the PPU, but I admit I'm beginning to run out of ideas.
Given that you have two PPUs with the same flaw, I really don't think it's a flaw of the PPU, but I admit I'm beginning to run out of ideas.
Re: NES vertical artefacts after cuted 4th leg CIC pal ver
When is off I has 0V on pins 5 and 6. When is on 3.6V on pin 5 and 4.9V on pin 6.
Re: NES vertical artefacts after cuted 4th leg CIC pal ver
... yeah, that's bad. Somehow you've got a bad connection that's overriding PPU A13 = pin 25. No idea how, but both the voltage on the pin and the resistance you've told me imply that's what's wrong.
Re: NES vertical artefacts after cuted 4th leg CIC pal ver
Means PPU is damage? But I dont know how becouse changed 2 PPU from my good 2 nes pal and still was artifacts.
Re: NES vertical artefacts after cuted 4th leg CIC pal ver
Yeah, I don't think it's the PPU. I think it's the circuit board.
Re: NES vertical artefacts after cuted 4th leg CIC pal ver
Yes, the main PCB, or the socket, or the solder.
Re: NES vertical artifacts after cuted 4th pin CIC pal ver
Thanks for help everyone, now nes pal working perfect:-)) Finally broken was two chips, PPU and 74HCU04P.