Connecting Speck to TV
ZXNet echo conference «hardware.zx»
Hello Ronin
Yar> 15-R
Yar> 11-G
Yar> 7-B
Yar> 16-switching from TVAB to RGB 5V (log1). ...
Yar> also send sync to the video input...
I’ll add that the “video input” is pin 20 of the SCART. In addition, you need to have
and a common wire (ground) to pins 5, 9, 13, 14 and 18.
You should also remember that not all TVs have a SCART connector.
be fully realized. I came across a Horizont 54CTV-670-I-5 TV from
which SCART didn’t even have metal contacts responsible for
RGB signals; the instructions for it also did not mention anything about the possibility
connecting RGB equipment.
Hello, Forward
For> The background is white as expected, the text is also displayed normally, but where
For> must be red, green is displayed, where yellow is blue, etc.
Did you happen to mix up the color wires?
Hello, Forward
Then turn it off one by one, you’ll understand the system, then you can say something
Hello Grand
> 15-R
> 11-G
> 7-B
> 16-switching from TVAB to RGB 5V (log1). ...
> also send sync to the video input...
>
I got a Pentagon 128 and connected it according to this diagram. I called contacts from
port to the RGB connector, soldered it to a scart, It seems to work, but the colors are displayed
wrong. The background is white as expected, the text is also displayed normally, but there
Where there should be red, green is displayed, where yellow is there, blue is displayed, etc.
How to get rid of such trouble? Please, if possible, explain with your fingers - I
I'm not good at electronics.
Hello, do_se
do_> did you happen to mix up the color wires?
No, I double-checked it many times. From 16,17,18,19 port feet to corresponding feet
Scarta called...maybe the dog was rummaging around somewhere else? Are there possible discrepancies?
location of RGB color signals on the spec block?
Hello, Forward
For> I got a Pentagon 128 and connected it according to this diagram. Rang
For> contacts from the port to the RGB connector, soldered to a scart, It seems to have worked,
For> but the colors are not displayed correctly. The background is white as expected, the text too
For> is displayed normally, but where it should be red is displayed
For> green, where there is yellow there is blue, etc.
For> How to get rid of such trouble? Please explain as much as possible
For> fingers - I'm not very good with electronics.
This is elementary, Watson, you need to swap the wires going to pin 15
(red) and 11 pins (green).
Hello, Jukov
Juk> It's elementary, Watson, you need to swap the running wires
Juk> to pin 15 (red) and pin 11 (green).
Holmes, how do you explain that he has blue instead of yellow? This is the main color!
Hello Costa
3 KT315 transistors as inverters
Hello jtn
jtn> 3 KT315 transistors as inverters
He has
For> The background is white as expected, the text is also displayed normally
Hello Costa
to Costa....
jtn> 3 KT315 transistors as inverters
I also have a suspicion that perhaps one of the signals is in inversion
it works, that’s why I suggest you understand the system
Hello, Forward
For> and soldered some broken diodes I found on the board (like
For> diodes, but not sure)
and put the diodes in place, it will be more correct..
Hello, Forward
For> white text, as expected, is also displayed normally, but where
For> should be red, green is displayed, where there is yellow there is blue, etc.
You need to invert RGB.
Hello, do_se
do_> to Costa....
do_> maybe one of the signals in inversion is working, that’s why
do_> I suggest you understand the system
I figured it out - thanks everyone. The previous owner of this computer just soldered it
there is too much - using the sequential search method I bit these appendages near
microcircuits that do the inversion and soldered some that I found on the board
bitten diodes (like diodes, but not sure) - strange, but for some reason
It worked, I didn’t even understand how...
Hello, do_se
do_> and put the diodes in place, it will be more correct..
but I didn’t remove them - on the contrary, their legs were bitten and I soldered them back together.