[Coco] RGB cable for Samsung SyncMaster 711mp

[Retro Canada]

they are R61 and R62. just pull the resistor side opposite to the label and your pin 10 will be disconnected.

your monitor does work. you can see the image. is the sync that is getting spoiled.

On Apr 10, 2014, at 5:04 PM, "Ken H." <dragon.atv at gmail.com> wrote:

Just checked again and SCART pin 20 is connected to the 74ls02 pin 10 which
is the CSYNC.
If your diagnosis the composite sync issues I'll do more testing there.  I
was worried that this monitor may not support 15khz after all.


On Thu, Apr 10, 2014 at 11:31 PM, Luis Antoniosi (CoCoDemus) <
retrocanada76 at gmail.com> wrote:

> In your video you are clearly missing composite sync. I bet you wired
> it to the wrong pin.
> 
> 
>> On Thu, Apr 10, 2014 at 4:22 PM, Ken H. <dragon.atv at gmail.com> wrote:
>> I have built a Coco3 RGB to SCART cable for my Samsung SyncMaster 711mp
>> monitor but the image is jumping around.  You can see it in this short
>> video here: http://youtu.be/5Jm2T_HyK5E
>> What's wrong? Is the Sync signal wrong or perhaps this monitor doesn't
>> support 15khz RGB? (although I believe it should)
>> I have used a 74ls02 to create the composite sync.  Scart Pin 8 has 12
> volt
>> and pin 16 measures about 5v.
>> Can you tell what's the problem based on how this image looks?
>> thanks
>> Ken
>> 
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