Neo Geo:Chip Replacements: Difference between revisions
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Some chips on Neo Geo motherboards can go bad. Luckily, | Some chips on Neo Geo motherboards or cartridges can go bad. Luckily, there are some drop-in replacements for these chips. | ||
== Symptoms == | == Symptoms == | ||
=== NEO-BUF === | === NEO-BUF === | ||
[https://www.tindie.com/products/furrtek/neo-buf-replacement/ NEO-BUF replacement chip]. | |||
* Random reboots during gameplay, particularly on a 161-in-1 cart. | * Random reboots during gameplay, particularly on a 161-in-1 cart. | ||
* Green screen on boot, and it's not a typical [[Neo_Geo:General_Troubleshooting#Freezing_on_Green_Screen_or_CALENDAR_ERROR_Screen|calendar error]]. | * Green screen on boot, and it's not a typical [[Neo_Geo:General_Troubleshooting#Freezing_on_Green_Screen_or_CALENDAR_ERROR_Screen|calendar error]]. | ||
=== NEO-ZMC2 == | === NEO-ZMC2 === | ||
[https://www.tindie.com/products/furrtek/neo-zmc2-replacement/ NEO-ZMC2 replacement chip]. | |||
* Vertical stripes to appear on sprites. | * Vertical stripes to appear on sprites. | ||
* Completely missing audio on MVS systems | * Completely missing audio on MVS systems | ||
=== NEO-257 === | |||
[https://www.tindie.com/products/furrtek/neo-257-replacement/ NEO-257 replacement chip]. | |||
? | |||
=== NEO-273 === | |||
[https://www.tindie.com/products/furrtek/neo-273-replacement/ NEO-273 replacement chip]. | |||
Graphics (sprites and text) glitches. | |||
=== NEO-D0 === | |||
[https://www.tindie.com/products/furrtek/neo-d0-replacement/ NEO-D0 replacement chip]. | |||
? | |||
=== NEO-E0 === | |||
[https://www.tindie.com/products/furrtek/neo-e0-replacement/ NEO-E0 replacement chip]. | |||
A faulty NEO-E0 chip prevents the system or specific slots (on multi-slot systems) from booting. | |||
=== NEO-G0 === | |||
[https://www.tindie.com/products/furrtek/neo-g0-replacement/ NEO-G0 replacement chip]. | |||
? | |||
=== BA10324 === | |||
Replace with a JRC 2058D chip. | |||
* Scratchy or terrible audio for some instruments. ([https://twitter.com/OhPoorPup/status/1642678467497172992 example]) | |||
=== PCM Chip (Game Cartridge) === | |||
[https://www.tindie.com/products/furrtek/pcm-chip-replacement/ PCM Chip replacement chip]. | |||
A faulty PCM chip may cause audio issues on a single game cartrige. | |||
== Installation == | == Installation == | ||
Latest revision as of 19:43, 28 February 2024
Some chips on Neo Geo motherboards or cartridges can go bad. Luckily, there are some drop-in replacements for these chips.
Symptoms
NEO-BUF
- Random reboots during gameplay, particularly on a 161-in-1 cart.
- Green screen on boot, and it's not a typical calendar error.
NEO-ZMC2
- Vertical stripes to appear on sprites.
- Completely missing audio on MVS systems
NEO-257
?
NEO-273
Graphics (sprites and text) glitches.
NEO-D0
?
NEO-E0
A faulty NEO-E0 chip prevents the system or specific slots (on multi-slot systems) from booting.
NEO-G0
?
BA10324
Replace with a JRC 2058D chip.
- Scratchy or terrible audio for some instruments. (example)
PCM Chip (Game Cartridge)
A faulty PCM chip may cause audio issues on a single game cartrige.
Installation
- Remove the faulty chip with hot air.
- Remove the remaining solder on the PCB pads with solder braid if the surface isn't perfectly flat.
- Clean up the eventual flux residue with IPA.
- Place the NEO-BUF replacement board in the right orientation (see pin 1 mark), align it precisely, and solder the 4 corners using a generous amount of flux.
- Drag-solder all the sides or solder each pin individually. The small castellated contacts will "attract" solder by capillary action. Make sure none of the contacts are bridged.