Sega New Astro City¶
An evolution of the Sega Astro City (1995): same candy cab chassis, but a Nanao MS9 monitor and improved speakers. Mechanically and electrically very close to the Astro City — much info is shared (see the cross-references below).
Identification¶
| Field | Value |
|---|---|
| Manufacturer | Sega |
| Year | 1995 |
| Type | Candy cab |
| Screen | CRT 29", Nanao MS9, 15/24 kHz, rotatable |
| Controls | 2 players, interchangeable panel |
| Power | 100 V (Japan), ~140 W |
| PCB format | JAMMA |
| Dimensions | 905 × 750 × 1445 mm |
| Weight | 93 kg |
⚡ Connector & power¶
| Aspect | Value |
|---|---|
| PCB connector | JAMMA (56-pin edge) — no JVS |
| Monitor sync | 15/24 kHz (Nanao MS9) |
| Power | 100 V AC (Japan) |
| Consumption | ~140 W |
| Dimensions | 905 × 750 × 1445 mm (W×D×H) |
| Weight | ~93 kg |
(Sources: Arcade Otaku + archived manual.)
Differences from the Astro City¶
- Nanao MS9 monitor (instead of the MS8) — see repair: Nanao MS9.
- Improved speakers.
- Cosmetic / harness details very close.
Info shared with the Astro City¶
These topics are identical (the original Strip Down Guide actually targets the New Astro City) — see the Astro City page:
- Wiring (JAMMA + internal CP/audio/aux harness) → Astro City § Wiring
- Stereo sound → Astro City § Stereo sound
- Disassembly (JIS screws!) → Astro City § Disassembly
- Monitor adjustments / recap → Nanao MS9
Internal boards¶
- 🖥️ Monitor: Nanao MS9 → repair.
- ⚡ Power block (Sega PSU) → Sega PSU repair.
Common mods¶
- Native RGB (JAMMA), supergun-friendly.
- 31 kHz / tri-sync: the MS9 is 15/24 kHz; for 31 kHz, a tri-sync monitor/chassis swap.
- LCD screen (conversions exist).
- → Modernising a cabinet (video/PSU/JVS/PC-in-cab).
Manuals & schematics (archived)¶
- 📘 Service manual (EN) — PDF
Photos / assets¶
(To add: cabinet, MS9 monitor, speakers, control panel.)
Repair & maintenance
CRT monitor (discharge HV!) → CRT safety + Nanao MS8 / MS9 chassis · Sega candy PSU → PSU repair · recap → Recap.
Sources & attribution¶
Text (content synthesised/shared here; sources for attribution):
- Arcade Otaku Wiki — Sega New Astro City (specs, MS9 monitor) — https://wiki.arcadeotaku.com/w/Sega_New_Astro_City
- Arcade Otaku Wiki — New Astro City Strip Down Guide (disassembly, by thomj) — https://wiki.arcadeotaku.com/w/New_Astro_City_Strip_Down_Guide
Image:
-
new-astro-city.jpg— Andrew Eaton, CC BY-SA 2.0 — https://commons.wikimedia.org/wiki/File:Sega_New_Astro_City_(50356520032).jpg
.jpg){kind=link}
Review & corrections
How this space is used
Spotted a wrong value, an outdated procedure, a chip reference that does not match your board? Say so here, with what you observed (model, board revision, serial number, measurement). Every report is cross-checked against a source before anything changes — an unverifiable correction is published as “reported by …, not cross-checked” rather than silently applied.
Reading is open to everyone; posting requires signing in with Discord. Reports from the wiki's declared reviewers are handled first; anyone else's are read too, but go through a human before anything is changed.