Problem console

Started by Death_Devil, April 18, 2016, 11:12:33 am

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Death_Devil

Hey guys. I again appeal to you to the same problem on av famicom.
The problem is, when you turn the game on Famicom AV, works fine at first. But after 10 minutes began to appear the strange artifacts on the screen. This is because of some violations of the console. Changed the chip 74LC373 not helped. Only when Castlevania 3, do not appear artifacts, even strange. And all the other cartridges, there are artifacts.
What could be the reason?

NintendoKing


Death_Devil

April 19, 2016, 04:48:30 am #2 Last Edit: April 20, 2016, 02:34:08 am by Death_Devil
Quote from: The Uninvited Gremlin on April 18, 2016, 06:29:56 pm
Possibly a damaged PPU.

what is the analogue of the PPU chip with marking rp2c02h?

Post Merge: April 20, 2016, 02:34:08 am

UA6528 the chip suitable to replace the PPU?

P

No the PPU is a custom chip designed for the Famicom, you can only replace it with another working RP2C02 (the final letter "H" is the revision, and probably doesn't matter) from another Famicom or NTSC NES.

Death_Devil

Quote from: P on April 21, 2016, 01:50:40 am
No the PPU is a custom chip designed for the Famicom, you can only replace it with another working RP2C02 (the final letter "H" is the revision, and probably doesn't matter) from another Famicom or NTSC NES.

UA6528 means the chip will not work?

P

What is the UA6528 chip? Famiclone PPU? It will probably not work correctly with a real Famicom, but I don't know for sure.

number47

It's PAL speed PPU clone so it will glitch unless you replace CPU and XTAL also.

xIceMan

CPUs: UA6527 (NTSC), UA6527P(PAL)
PPUs: UA6528 (NTSC), UA6538 (PAL)

aarkay14

Replace the capacitors?!