You could break the video path at the 6MHz filter (the blue ceramic resonator) and inject video there.
Need to scope it to confirm and get the required bias level.
How strange, I jus received a notification email with a reply to the thread:
You could break the video path at the 6MHz filter (the blue ceramic resonator) and inject video there.
Need to scope it to confirm and get the required bias level.
but it seems that post is either still awaiting authorisation or has been deleted.
All the same, I'll reply to say that the TB1229CN chip used for the video & audio processing, has switchable inputs for both but these are controlled by the I2C BUS from the MICON, which is the bit I can't crack (yet?).
This circuit was taken from an AIWA VX-G142 TV/Video unit.
I have disconnected the TV Audio and Video signals and injected my test signals and it works perfectly, so I could:
a. Add sockets and convert it to AV input only
b. Add sockets and a switch(s) to make it switchable TV/AV
c. Leave it be and look for another set.
My current preference is for c. as the current monitor I use has these inputs and also RGB which are controlled by the channel selector buttons on the front, its a Ferguson TV10 set made for the home computer market of the 80s. However, it's mounted up on a shelf above my bench so I need to stand on a stool or use a rod to switch to different inputs. Essentially I wanted to swap the set for a Remote Control model as I'm both lazy and 70, so climbing on stools is not recommended.
I'll keep looking for a replacement, this time one with a SCART or AV sockets controllable by remote and hang on to these for anyone wanting a dedicated set with just Composite Video and Audio inputs. There's plenty of space on the back cabinet where the SCARD socket would have been, so could be useful to someone for Retro computing use.
If it's broke - FIX IT - Don't bin it.
How strange, I jus received a notification email with a reply to the thread:
but it seems that post is either still awaiting authorisation or has been deleted.
What's even stranger is no post required authorisation, nothing was deleted, and the post content you quote from your notification e-mail appears above your reply at the top of this page. Mee thinks you've been sampling the Christmas tipple a little early, especially with the slurred "Just" highlighted 😉 🤣
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How strange, I jus received a notification email with a reply to the thread:
but it seems that post is either still awaiting authorisation or has been deleted.
What's even stranger is no post required authorisation, nothing was deleted, and the post content you quote from your notification e-mail appears above your reply at the top of this page. Mee thinks you've been sampling the Christmas tipple a little early, especially with the slurred "Just" highlighted 😉 🤣
Now if it had been a bit later in the day, I might well have agreed with you re the tipple 😉but even stranger things have happened.
I've just come to reply to your post and what do I see above my post is the post that never was!!! - the one from irob, It's there now. I didn't actually quote it when I wrote mine, I just added the BBC tags and copied the text from the email I received.
I think it's a case of the Internet Cache keeping things hidden for a while until the rest of our aging pooters can catch up. Either that or the forum server cache was holding on to it. Reminds me of the good old dial-up days when you could download the content of a BBS and then an hour later, the content had either doubled or disappeared.
Anyway, it's all here now... I think 🤔🤔
If it's broke - FIX IT - Don't bin it.
