Video Cable - Revision history

Stefan Haubenthal: /* PAL Video Output */ typo

2015-11-05T22:42:18Z

PAL Video Output: typo

← Older revision		Revision as of 22:42, 5 November 2015
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	The sixth pin being in the centre.		The sixth pin being in the centre.

	sound o o + ~~12v~~		sound o o + 12V
	o earth		o earth
	b-y o o vid (~~luminence~~)		b-y o o vid (luminance)
	o r-y		o r-y

Stefan Haubenthal: Category

2015-11-05T22:38:59Z

Stephen Shaw: correct case on link

2014-10-12T12:30:51Z

correct case on link

← Older revision		Revision as of 12:30, 12 October 2014
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	IMPORTANT: This main article refers to an NTSC TI-99/4a console. The European model used a different 6 pin plug. For details please see the [[#PAL Video ~~output~~\|end of the page]].		IMPORTANT: This main article refers to an NTSC TI-99/4a console. The European model used a different 6 pin plug. For details please see the [[#PAL Video Output\|end of the page]].

	These are instructions for making a video cable to replace the [[RF Modulator]] that came with the computer. Whereas the [[RF Modulator]] connected to the antenna leads of a TV, this cable will connect to the RCA audio/video connections of newer TVs, VCRs, PCs, etc. *		These are instructions for making a video cable to replace the [[RF Modulator]] that came with the computer. Whereas the [[RF Modulator]] connected to the antenna leads of a TV, this cable will connect to the RCA audio/video connections of newer TVs, VCRs, PCs, etc. *

Stephen Shaw: add details of PAL console video output

2014-10-12T12:28:08Z

add details of PAL console video output

← Older revision		Revision as of 12:28, 12 October 2014
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			IMPORTANT: This main article refers to an NTSC TI-99/4a console. The European model used a different 6 pin plug. For details please see the [[#PAL Video output\|end of the page]].

	These are instructions for making a video cable to replace the [[RF Modulator]] that came with the computer. Whereas the [[RF Modulator]] connected to the antenna leads of a TV, this cable will connect to the RCA audio/video connections of newer TVs, VCRs, PCs, etc. *		These are instructions for making a video cable to replace the [[RF Modulator]] that came with the computer. Whereas the [[RF Modulator]] connected to the antenna leads of a TV, this cable will connect to the RCA audio/video connections of newer TVs, VCRs, PCs, etc. *

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	''Information on this page is from http: //www.nwlink.com/~theraven/ti994a/dinplug.htm, which is no longer available		''Information on this page is from http: //www.nwlink.com/~theraven/ti994a/dinplug.htm, which is no longer available

			==PAL Video Output==
			In Europe a different video output (YUV) was used to connect to an external PAL-G modulator. This used a 6 pin DIN socket.
			The sixth pin being in the centre.

			sound o o + 12v
			o earth
			b-y o o vid (luminence)
			o r-y

			The connection for a monochrome monitor should be across pin 6 (earth), and pin 2 (video). The video is monochrome, colour is obtained using the colour difference signals.

			Beware of earthing pin 3 (r-y) to ground which can damage the video output I.C.

			The input impedance of the monochrome monitor should be fairly high (above 560 ohms) and not 75 ohms (which is a standard value), as the video output circuit of the console can be damaged feeding a 75 ohm load.

			TI did not use RBG output in Europe so obtaining colour on a colour monitor from a European console is not easy but is possible with additional complex circuitry. A monitor with a "colour difference" input may work but do check impedances.

Mizapf at 16:31, 29 December 2009

2009-12-29T16:31:10Z

New page

These are instructions for making a video cable to replace the [[RF Modulator]] that came with the computer. Whereas the [[RF Modulator]] connected to the antenna leads of a TV, this cable will connect to the RCA audio/video connections of newer TVs, VCRs, PCs, etc. *

== Parts List ==

* 5-Pin DIN Plug (Radio Shack Cat No. 274-003A)
* Set of RCA type connectors (one for video and one for audio)
* Solder (use a fine electronics grade solder, NOT the plumbers type)
* Soldering iron (30W seems to work well for me)
* Wire strippers
* Diagonal cutting pliers
* Ohm Meter (for testing the cable)
* Some type of clamping device (to hold the plug still while you solder it)

[[Image:rca.jpg|right|200px]]

<div class="clear:both"/>

== What To Do ==

# Cut the RCA connectors off of one end of the RCA cable. This will expose the wires for us to work with and leave a set of RCA connectors on the opposite end.
# Strip 1/2 inch of the outer casing away, exposing the center conductor surrounded by the grounding conductors.
# Cut away about half of the grounding conductors so as to decrease their quantity and enable us to fit them in the DIN plug.
# Strip away about 1/4 inch of the insulation on the center conductor.
# Repeat steps 2 to 4 on the other cable.
# Tin the center conductors of both cables (apply a thin covering of solder to the. This will make it easier to join the conductors to the plug.
# Twist the ground wires from both cables together and tin them also.
# You should have three wires to work with, a ground and two center conductors.
# Cut the tips of all the wires to make a clean and even connection.

[[Image:dinplug.jpg|right|200px]]

== Connecting The Wires ==

You must use caution when applying heat to the pins as the plastic holding the pin will melt if it gets too hot.

# Apply a small amount of solder to the inside of pins 2, 3, and 4.
# Heat pin-3 until the solder melts and insert one of the center conductors, remove the soldering iron and allow to cool.
# Repeat step 2 for pin 4
# When connecting to pin 2, you will use the ground wire not the center conductor

* Pin-1: Unused
* Pin-2: Ground Connection
* Pin-3: Audio Connection
* Pin-4: Video Connection
* Pin-5: Unused

== Testing The Connection ==

# Use an Ohm meter to test the continuity between the pin and the other end of the cable. If you do not get a reading, then one of the connections is bad. Check the connection and reapply solder if needed.
# The things to check for are that you have continuity between the grounds on both RCA cables and pin-2 and that the center conductors have continuity from pins 3 and 4 to the respective RCA pins. You also want to ensure that none of the pins are shorting to any other pin.

''Information on this page is from http: //www.nwlink.com/~theraven/ti994a/dinplug.htm, which is no longer available

← Older revision		Revision as of 22:38, 5 November 2015
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	TI did not use RBG output in Europe so obtaining colour on a colour monitor from a European console is not easy but is possible with additional complex circuitry. A monitor with a "colour difference" input may work but do check impedances.		TI did not use RBG output in Europe so obtaining colour on a colour monitor from a European console is not easy but is possible with additional complex circuitry. A monitor with a "colour difference" input may work but do check impedances.

			[[Category:Hardware]]