Neo Geo AES
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- For more information, see this article's corresponding Wikipedia page: Neo Geo.
| This device is in the WorkNeeded:OriginalParts category because it was flagged as missing information on the original parts. It may have replacement parts listed but those cannot be assumed to be identical to the originals. If you have a list of the original parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables | 
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| This device is in the WorkNeeded:ReplacementParts category because it was flagged as missing information on replacement parts. If it has the original parts listed you may be able to search for replacements using the parametric searches available from parts distributors. If you have or make a list of replacement parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables | 
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Neo Geo AES
| Preliminary Information | |
|---|---|
| Release Year | 1990 |
| Leak Risk | Medium |
| Batteries | None |
| Mounting Technology | Mostly TH, some SMD |
| Capacitor Types | Aluminium electrolytic, ceramic |
| Destructive Entry | No |
| Hardware Specifications | |
| CPU | 68000 |
| Display Interface | 15kHz RGB and composite |
| Power Requirements | |
| Input Voltage | 5V DC or 9V DC, depending on model |
| Power Connector | Barrel jack 5.5x2.1mm, centre negative |
 NOTE There are two versions of the AES with different input voltages (5 V and 9 V), as well as several motherboard revisions. Ensure power adapter voltage is correct. |
The 5V models require a centre positive 5V supply, and while they have over-voltage protection they can still be damaged. The 9V versions require a centre positive 9V supply, and have an internal regulator that generates 5V. Most (all?) motherboards can be either type and can be changed over by removing and adding components.
Diagnostic BIOS original version: https://smkdan.eludevisibility.org/neo/diag/
Diagnostic BIOS updated fork: https://github.com/jwestfall69/neogeo-diag-bios
Note that both require a cartridge to be inserted to work.
Known Issues
Graphical glitches
Causes
- Low voltage on power rails.
Solutions
- Damaged power supply.
- 5V over-voltage protection circuit failure (5V models).
- Damaged switch mode regulator (9V models).
Solid colour screen
Causes
- BIOS checks failed at power on.
Solutions
- Blue screen - all checks OK, cartridge not inserted/faulty.
- Red screen - work RAM error.
- Green screen - palette RAM error.
- Yellow screen - video RAM error.
- Magenta screen - BIOS self check error (i.e. checksum).
- Cyan screen - memory card error.
RAM types and locations: https://wiki.neogeodev.org/index.php?title=RAM_chip
Disassembly Notes
Some screws are under the stick-on feet. The screws holding the memory slot in need to be removed to lift the motherboard out.
AES3-5 schematic (reproduction): https://github.com/Board-Folk/NeoGeoAES-3.5
Some original schematics: https://wiki.neogeodev.org/index.php?title=Schematics
Original Parts
NEO-AES3-4 Motherboard
| RefDes | Qty | Capacitance | Voltage | Mount | Diameter/Size | Height | Lead Spacing | Temp | Type | Brand | Series |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2200 µF | 16V | TH | 16mm | 16mm | 7.5mm | 0 °C | Electrolytic | TK | ||
| 1 | 470 µF | 16V | TH | 16mm | Electrolytic | ||||||
| 2 | 220 µF | 10V | TH | 16mm | Electrolytic | ||||||
| 7 | 100 µF | 10V | TH | 7mm | Electrolytic | ||||||
| 1 | 47 µF | 16V | TH | 5mm | 2.54mm | Electrolytic | |||||
| 3 | 22 µF | 10V | TH | 5mm | 2.54mm | Electrolytic | |||||
| 5 | 10 µF | 16V | TH | 5mm | 2.54mm | Electrolytic | |||||
| 7 | 4.7 µF | 16V | TH | 5mm | 2.54mm | Electrolytic | |||||
| 4 | 1 µF | 50V | TH | 5mm | 2.54mm | Electrolytic | |||||
| 103 | .01 uF | TH | Ceramic | ||||||||
| 104 | 0.1 uF | TH | Ceramic | ||||||||
| 221 | 5 | 220 pF | TH | Ceramic | |||||||
| 331 | 330 pF | TH | Ceramic |
| Part | RefDes | Qty | Value | Power | Mount | Temp | Type | Tolerance |
|---|---|---|---|---|---|---|---|---|
| Resistor | 3.9 | 2 | 3.9Ω | 1/8W | Through Hole | |||
| Resistor | 10 | 1 | 10Ω | 1/8W | Through Hole | |||
| Resistor | 68 | 4 | 68Ω | 1/8W | Through Hole | |||
| Resistor | 150 | 3 | 150Ω | 1/8W | Through Hole | |||
| Resistor | 220 | 3 | 220Ω | 1/8W | Through Hole | |||
| Resistor | 470 | 3 | 470Ω | 1/8W | Through Hole | |||
| Resistor | 1K | 7 | 1KΩ | 1/8W | Through Hole | |||
| Resistor | 2.2K | 4 | 2.2 KΩ | 1/8W | Through Hole | |||
| Resistor | 3.2K | 3 | 3.2KΩ | 1/8W | Through Hole | |||
| Resistor | 3.9K | 3 | 3.9KΩ | 1/8W | Through Hole | |||
| Resistor | 4.7K | 7 | 4.7KΩ | 1/8W | Through Hole | |||
| Resistor | 6.8K | 7 | 6.8 KΩ | 1/8W | Through Hole | |||
| Resistor | 8.2K | 3 | 8.2KΩ | 1/8W | Through Hole | |||
| Resistor | 10K | 3 | 10KΩ | 1/8W | Through Hole | |||
| Resistor | 68K | 1 | 68KΩ | 1/8W | Through Hole | |||
| Crystal | 3.579545 MHz | 1 | 3.579545 MHz | Through Hole | ||||
| Crystal | 24.167829 MHz | 1 | 24.167829 MHz | Through Hole |
| RefDes | Qty | Part Number/Model Number | Manufacturer (If Applicable) | Explanation | Datasheet |
|---|---|---|---|---|---|
| 4558 | 4 | 4558D | JRC (Japan Radio Company) | General Purpose Op-Amp | RC4558 |
| 2066D | 1 | 2066D | JRC (Japan Radio Company) | ||
| YM2610 | 1 | YM2610 | Yamaha | 6-Channel OP.FM, SSG & ADPCM sound generator | YM2610 / YM2610 (translated) |
| YM3016 | 1 | YM3016-D | Yamaha | 2-Channel Serial/Binary DAC | YM3016 |
| 68000-12 | 1 | HD68HC000PS12 | Hitachi | 68000-series Microprocessors | HD68HC000 |
| LS06 | 1 | HD74LS06P | Hitachi | Hex Inverter Buffer/Driver | HD74LS06 |
| HC04 | 2 | HD74HC04P | Hitachi | Hex Inverter | HD74LS04 |
| HC32 | 1 | HD74HC32P | Hitachi | Quad 2-Input Positive OR Gate | HD74LS32 |
| 6116 | 1 | BR216A-15L | |||
| Z80B | 1 | Z80B | Sharp | ||
| 531024 | 1 | TC531024P-15 | Toshiba | 1 Megabit (65,536 Word x 16-Bit) CMOS Mask ROM | TC531024P-15 |
| HC259 | 1 | HD74HC259P | Hitachi | 8-Bit Addressable Latch | HD74LS259 |
| 43256 | 4 | CXK58257AM-10L | Sony | ||
| 5863 | 2 | CXK5814P-35L | Sony | ||
| 531000 | 1 | TC531000CP | Toshiba | 1 Megabit (128K Word x 8-bit) CMOS Mask ROM | TC531000CP |
| LS244 | 1 | HD74LS244P | Hitachi | Octal Buffer/Line Driver/Line Reciever | HD74LS244 |
| AS04 | 1 | SN74AS04N | Texas Instruments | Hex Inverter | SN74AS04 |
| CXA1145P | 1 | CXA1145P | Sony | RGB Encoder | CXA1145P |
| LS05 | 1 | HD74LS05P | Hitachi | Hex Inverter | HD74LS05 |
| LS273 | 2 | HD74LS273P | Hitachi | Octal D-Type Positive-Edge-Triggered Flip-Flops | HD74LS273 |
| 4264 | 2 | CXK5864BSP-10L | Sony | 8192 word x 8-bit High Speed CMOS Static RAM | CXK5864BSP-10L |
Replacement Parts
NEO-AES3-4 Motherboard
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| 5 | 470µF 10v, sized to fit near video port. Larger caps will not fit.
These replace the 100uF caps for improved video quality. Nichicon UVZ1A471MED1TD or Panasonic ECA0JM471 |
Mouser DigiKey LCSC | |
| 1 | Correct size replacement.
Cannot be too tall or case will not close. Nichicon URS1C222MHD |
MouserDigikey LCSC |
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| 4558 | 4 | RC4558P | DigiKey Mouser LCSC |
| LS06 | 1 | SN74LS06N / XD74LS06 | DigiKey Mouser LCSC |
| HC04 | 2 | SN74HC04N | DigiKey Mouser LCSC |
| HC32 | 1 | SN74HC32N | DigiKey Mouser LCSC |
| HC259 | 1 | SN74HC259N / SN74HC259N(XBLW) | DigiKey Mouser LCSC |
| LS244 | 1 | SN74LS244N / SN74LS244N(XBLW) | DigiKey Mouser LCSC |
| AS04 | 1 | SN74AS04N / SN74AS04DR | DigiKey Mouser LCSC |
| LS05 | 1 | SN74LS05N / SN74LS05N(LX) | DigiKey Mouser LCSC |
| LS273 | 2 | SN74LS273N / SN74LS273N(LX) | DigiKey Mouser LCSC |
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| 3.9 | 2 | CR1/8W-3Ω9±5%-ST52 | DigiKey Mouser LCSC |
| 10 | 1 | CF18JT10R0 / CR1/8W-10Ω±5%-ST26 | DigiKey Mouser LCSC |
| 68 | 4 | CF18JT68R0 / RN55D68R1FB14 / MF1/8W-68Ω±1%-OT52 | DigiKey Mouser LCSC |
| 150 | 3 | CF18JT150R / CR1/8W-150Ω±5%-ST52 | DigiKey Mouser LCSC |
| 220 | 3 | CF18JT220R / MF1/8W-220Ω±1%-ST52 | DigiKey Mouser LCSC |
| 470 | 3 | OJ4715E-R52 / MF0W8FF4700A50 | DigiKey Mouser LCSC |
| 1K | 7 | CF18JT1K00 / CR1/8W-1K±5%-ST26 | DigiKey Mouser LCSC |
| 2.2K | 4 | CF18JT2K20 / CR1/8W-2K2±5%-OT26 | DigiKey Mouser LCSC |
| 3.2K | 3 | RN55C3201BB14 / MF1/8W ±1% 3K16 STB5 | DigiKey Mouser LCSC |
| 3.9K | 3 | OJ3925E-R52 / CR1/8W-3K9±5%-ST26 | DigiKey Mouser LCSC |
| 4.7K | 7 | CF18JT4K70 / CR1/8W-4K7±5%-ST52 | DigiKey Mouser LCSC |
| 6.8K | 7 | CF18JT6K80 / CR1/8W-6K8±5%-ST26 | DigiKey Mouser LCSC |
| 8.2K | 3 | CF18JT8K20 / RN55D8201FRE6 / CR1/8W-8K2±5%-ST26 | DigiKey Mouser LCSC |
| 10K | 3 | CF18JT10K0 / CR1/8W-10K±5%-OT26 | DigiKey Mouser LCSC |
| 68K | 1 | OJ6835E-R52 / CR1/8W-68K±5%-ST52 | DigiKey Mouser LCSC |
| 3.579545 MHz | 1 | A-3.579545-18 / ECS-35-S-1X / | DigiKey Mouser |
| 24.167829 MHz | 1 | DigiKey Mouser LCSC |
If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.
Related Links
