CoCo3 RGB2NTSC User Manual Download Page 4

Page: 4 / 6

Resistors to clip, R61 & R62

Once the internal mods are completed, put the CoCo3 case back together. The ribbon
cable provided has two ends; the keyed in goes into the RGB2NTSC board itself, the
non-keyed end goes into the bottom of the CoCo3 as shown below.

Summary of Contents for RGB2NTSC

Page 1: ...LATION The CoCo3 RGB2NTSC requires a minor modification to your CoCo3 motherboard In order to supply access to the GIME s system clock at the RGB port for proper synchronization of video a single wire must be soldered in and two resistors clipped The RGB2VGA is supplied with a pre cut and pre tinned piece of wire for the mod install the wire connecting one end of R63 to pin 10 of the RGB port as s...

Page 2: ......

Page 3: ...connected to pin 10 of the RGB port They are part of the monitor sense signal provided for in the CoCo3 design This feature was never used and so these resistors can be clipped and pin 10 of the RGB port used for our purpose in getting the GIME clock outside the CoCo case Clip them as shown in the following picture ...

Page 4: ...2 Once the internal mods are completed put the CoCo3 case back together The ribbon cable provided has two ends the keyed in goes into the RGB2NTSC board itself the non keyed end goes into the bottom of the CoCo3 as shown below ...

Page 5: ...display and connect the power to the converter board WARNING Only a 5V dc power may be used as the supply for the converter board Connecting a higher voltage such as 7 5 or 9VDC will blow the encoder chip and render the board non functional Use only the supplied 5v USB power cable with the RGB2NTSC converter or another 5vdc power supply WARNING ...

Page 6: ...lightly requiring readjustment When software asks whether you have a composite or RGB monitor always reply RGB even when using the board s composite connection This will give you RGB colors or the closest NTSC equivalents for your picture Though the converter does work with older CRT type displays it s important to note that the overscan used on these units are likely to crop the top and bottom of...

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