User:Theretrobristolian/MS9-29
| Nanao MS9-29 | |
|---|---|
 Photo of an MS9-29S-E chassis | |
 | |
| Manufacturer | NANAO CORPORATION |
| Year(s) | 1997 |
| Resolution(s) |
15kHz (Standard) 24kHz (Medium) |
| Resolution Switching |
Manual Auto (on some models) |
| B+ (Voltages) |
15kHz 76VDC 24kHz 119VDC (+/- 0.2VDC) |
| Base Type | B10-277 (B&K CR-23) |
| Predecessor | MS8-29 |
| Successor | MS-2931 |
The Nanao MS9-29 was an arcade monitor manufactured by the NANAO Corporation (now known as Eizo Corporation)[1]. The MS9-29 proved to be a popular choice of Sega Europe being fitted to many genre defining machines like Daytona USA and House of the Dead. It was also known for its usage in Sega New Astro City and Taito Egret II cabinets.
The MS9-29 was a successor to the previous MS8-29 in almost every way, with improved safety (due to more components being on the secondary side instead of the primary side) and better colour adjustment with a dedicated Contrast pot. Sadly the MS9-29 in its default configuration suffers from a slightly softer picture than the MS8-29 in 24Khz mode, however a modification has been identified to restore the sharpness of the MS8 to the MS9[2].
Even to this day the MS9-29 proves to be a fan favourite.
Chassis Specifications/Variations
Chassis:
Input Voltage: 100-120V 50/60Hz 1.7A (105W)
LOPT (Flyback): MSU1FHH09 97307T
B+ Voltage: 15kHz 76V DC / 24kHz 116V DC (You must set the 15kHz voltage correctly first as the 24kHz is reliant on this).
CRT Tube Specifications
Across the many regions the MS9-29 was sold as well as multiple hardware variations, there were multiple tube choices:
| Model | Manufacture | a | b | c | d |
|---|---|---|---|---|---|
| VR287 | V. Size | 10K | 103B Dt | ALPS JAPAN | PTV09A-4015U-B103 |
| VR288 | V. Posi | 10K | 103B Dt | ALPS JAPAN | PTV09A-4015U-B103 |
Monitor tubes:
A68KJU96X (Toshiba)
A68KSA30X (Hitachi)
M68JUA068X (Matsushita)
A number followed by a letter between brackets on the label of Toshiba CRTs is the date of manufacture (4D = April 1994, 6H = August 1996, etc.) and is not part of the CRT designation.
In this example pictured 7E would be May 1997.
https://wiki.arcadeotaku.com/w/User:Theretrobristolian/MS9-29S-E
Adjustment settings
| Location | Name | Value (Ω) | Original Part | Brand | Replacements |
|---|---|---|---|---|---|
| VR283 | Contrast | 5K | 502B Dt | ALPS JAPAN | PTV09A-4015F-B502 |
| VR280 | R-GAIN | 3.3K | Unknown | Unknown | Amazon UK Link |
| VR281 | G-GAIN | 3.3K | Unknown | Unknown | Amazon UK Link |
| VR282 | B-GAIN | 3.3K | Unknown | Unknown | Amazon UK Link |
| VR284 | BRIGHT | 3.3K | Unknown | Unknown | Amazon UK Link |
| VR285 | H. Size | 10K | 103B Dt | ALPS JAPAN | PTV09A-4015U-B103 |
| VR286 | H. Posi | 10K | 103B Ct | ALPS JAPAN | PTV09A-4015U-B103 |
| VR287 | V. Size | 10K | 103B Dt | ALPS JAPAN | PTV09A-4015U-B103 |
| VR288 | V. Posi | 10K | 103B Dt | ALPS JAPAN | PTV09A-4015U-B103 |
Previously recommended replacement pots:
5K Pot: https://www.digikey.com/en/products/detail/PTV09A-4015F-B502/PTV09A-4015F-B502-ND/3781115 - Bourns Inc PTV09A-4015F-B502
10K Pot: https://www.digikey.com/en/products/detail/bourns-inc/PTV09A-4015F-B103/3781113 - Bourns Inc PTV09A-4015F-B103
3.3K Pots: Try Aliexpress or Amazon (look for "332" Potentiometers)
Manuals
Monitor Labels
Common Faults
Contributions and thanks
Thanks goes to initial contributions made by 'Kazuo', updated contributions made by 'TheRetroBristolian' and the 'Arcade Otaku Wiki pages' for hosting and assisting with tidying up and making this valuable information for others to read and enjoy.
Thanks to ekorz & Arcade-Projects forum members for the research. (Archive of the original)
Legacy Links
Schematic Page 1
Schematic Page 2
Pots on MS9 chassis
Input pinout
Nanao MS-9 capacitor listing
