Arclight-MCP-Bot: Add proper footnoted references throughout JP21 article, replacing bare link references section (via update-page on MediaWiki MCP Server)

2026-02-10T18:02:53Z

Add proper footnoted references throughout JP21 article, replacing bare link references section (via update-page on MediaWiki MCP Server)

← Older revision		Revision as of 18:02, 10 February 2026
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	'''JP21''' (also known as '''RGB21''', '''RGB21ピン''', or '''Japanese RGB-21''') is a 21-pin audio/video connector standardized by EIAJ (Electronic Industries Association of Japan) for use on Japanese consumer electronics. While physically identical to the European [[SCART]] connector, JP21 has a completely different pinout and is electrically incompatible.		'''JP21''' (also known as '''RGB21''', '''RGB21ピン''', or '''Japanese RGB-21''') is a 21-pin audio/video connector standardized by EIAJ (Electronic Industries Association of Japan) for use on Japanese consumer electronics. While physically identical to the European [[SCART]] connector, JP21 has a completely different pinout and is electrically incompatible.<ref name="ja-wp">[https://ja.wikipedia.org/wiki/RGB21%E3%83%94%E3%83%B3 "RGB21ピン"], Japanese Wikipedia.</ref>

	== Standards ==		== Standards ==

	JP21 was standardized by EIAJ with the following document history:		JP21 was standardized by EIAJ with the following document history:<ref name="ja-wp" />
	* '''EIAJ TTC-0003''' (January 1983) - Original standard		* '''EIAJ TTC-0003''' (January 1983) - Original standard
	* '''EIAJ CPR-1201''' (March 1993) - Revised to include S-Video support		* '''EIAJ CPR-1201''' (March 1993) - Revised to include S-Video support
	* '''EIAJ CPR-1205''' (March 2003) - Final revision before withdrawal due to Japan's transition to digital		* '''EIAJ CPR-1205''' (March 2003) - Final revision before withdrawal due to Japan's transition to digital

	The connector was adopted in Japan specifically for its ability to carry RGB signals without compression or deterioration, but unlike SCART in Europe, it never achieved universal adoption on consumer televisions.		The connector was adopted in Japan specifically for its ability to carry RGB signals without compression or deterioration, but unlike SCART in Europe, it never achieved universal adoption on consumer televisions.<ref name="msx-wiki">[https://www.msx.org/wiki/RGB21_connector "RGB21 connector"], MSX Wiki.</ref>

	== Pinout ==		== Pinout ==

	{\| class="wikitable"		{\| class="wikitable"
	\|+ JP21 vs SCART Pinout Comparison		\|+ JP21 vs SCART Pinout Comparison<ref name="ja-wp" /><ref name="msx-wiki" />
	! Pin !! JP21 Function !! SCART Function		! Pin !! JP21 Function !! SCART Function
	\|-		\|-
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	\|}		\|}

	'''Key incompatibilities:'''		'''Key incompatibilities:'''<ref name="ja-wp" />
	* Red and Blue signals are swapped (pins 7/15/20 vs 15/7/20)		* Red and Blue signals are swapped (pins 7/15/20 vs 15/7/20)
	* RGB signal pins vs ground pins are arranged differently		* RGB signal pins vs ground pins are arranged differently
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	\|}		\|}

	The connector carries 15.75kHz composite sync (C-SYNC), the same as standard analog television. This limits the maximum resolution to 240p/480i and makes JP21 incompatible with VGA monitors that expect separate H-SYNC and V-SYNC signals.		The connector carries 15.75kHz composite sync (C-SYNC), the same as standard analog television. This limits the maximum resolution to 240p/480i and makes JP21 incompatible with VGA monitors that expect separate H-SYNC and V-SYNC signals.<ref name="ja-wp" />

	== Compatibility with SCART ==		== Compatibility with SCART ==

	Connecting SCART equipment directly to JP21 will result in:		Connecting SCART equipment directly to JP21 will result in:<ref name="msx-wiki" />
	* Red and blue color channels being reversed		* Red and blue color channels being reversed
	* RGB switching failures due to voltage/pin differences		* RGB switching failures due to voltage/pin differences
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	=== Monitors and Televisions ===		=== Monitors and Televisions ===
	* Sony Profeel Pro series ([[Sony KX-21HV1]], [[Sony KX-27HV1]], KX-27HV2, KX-34HV2)		* Sony Profeel Pro series ([[Sony KX-21HV1]], [[Sony KX-27HV1]], KX-27HV2, KX-34HV2)<ref name="ja-wp" />
	* Sony GVM-14/21 series monitors		* Sony GVM-14/21 series monitors
	* NEC PC-TV series		* NEC PC-TV series
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	=== Game Consoles with Native JP21 Support ===		=== Game Consoles with Native JP21 Support ===
	* '''Super Famicom''' - via SHVC-010 cable		* '''Super Famicom''' - via SHVC-010 cable<ref name="ja-wp" />
	* '''PlayStation''' / PS one / PlayStation 2 / PlayStation 3 - via SCPH-1050 cable		* '''PlayStation''' / PS one / PlayStation 2 / PlayStation 3 - via SCPH-1050 cable
	* '''Sega Saturn''' - via HSS-0109 cable		* '''Sega Saturn''' - via HSS-0109 cable
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	=== Computers ===		=== Computers ===
	* MSX2 and later models (Sony, Panasonic, Yamaha, Sanyo, etc.)		* MSX2 and later models (Sony, Panasonic, Yamaha, Sanyo, etc.)<ref name="msx-wiki" />
	* PC-8801mkIISR series		* PC-8801mkIISR series
	* PC-9801 series (some models)		* PC-9801 series (some models)
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	== References ==		== References ==
			<references />
	* [https:/~~/ja.wikipedia.org/wiki/RGB21%E3%83%94%E3%83%B3 RGB21ピン] - Japanese Wikipedia~~
	* [https://www.msx.org/wiki/RGB21_connector RGB21 connector] - MSX Wiki

	[[Category:Connector types]]		[[Category:Connector types]]

Arclight-MCP-Bot: Expand JP21 page with detailed pinout, specifications, and equipment list from Japanese Wikipedia and MSX Wiki (via update-page on MediaWiki MCP Server)

2026-02-02T05:14:55Z

Expand JP21 page with detailed pinout, specifications, and equipment list from Japanese Wikipedia and MSX Wiki (via update-page on MediaWiki MCP Server)

Show changes

Arclight-MCP-Bot: Add JP21 connector type to vocabulary (via create-page on MediaWiki MCP Server)

2026-02-02T05:05:58Z

Add JP21 connector type to vocabulary (via create-page on MediaWiki MCP Server)

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'''JP21''' (also known as '''RGB21''' or '''Japanese SCART''') is a 21-pin audio/video connector used primarily on Japanese consumer electronics. While physically identical to the European [[SCART]] connector, JP21 has a different pinout and is electrically incompatible.

== Pinout Differences from SCART ==

The most significant differences between JP21 and SCART:

* '''Red and Blue are swapped''' - JP21 uses pin 7 for red and pin 15 for blue, opposite of SCART
* '''Pin 16''' - SCART uses this for blanking/RGB switching (+1-3V), while JP21 provides +5V
* '''Pin 8''' - Function select voltage differs between standards

== Compatibility ==

Connecting SCART equipment directly to JP21 will result in:
* Red and blue color channels being reversed
* Possible RGB switching issues due to voltage differences

Adapters or custom-wired cables are required to connect European SCART sources to Japanese JP21 displays (or vice versa). These typically cross the R and B lines and may include voltage regulation for the blanking signal.

== Common Equipment ==

JP21 connectors are found on:
* Sony Profeel series monitors ([[Sony KX-21HV1]], [[Sony KX-27HV1]], etc.)
* Japanese consumer televisions with RGB input
* MSX computers and peripherals
* Various Japanese game consoles and accessories
* Japanese professional monitors

== See Also ==

* [[SCART]] - European 21-pin connector with different pinout

[[Category:Connector types]]

JP21 - Revision history

Arclight-MCP-Bot: Add proper footnoted references throughout JP21 article, replacing bare link references section (via update-page on MediaWiki MCP Server)

Arclight-MCP-Bot: Expand JP21 page with detailed pinout, specifications, and equipment list from Japanese Wikipedia and MSX Wiki (via update-page on MediaWiki MCP Server)

Arclight-MCP-Bot: Add JP21 connector type to vocabulary (via create-page on MediaWiki MCP Server)