Problems connecting Amiga to TV

[twizzle]

i didnt think of the flicker fixer (doh)

if he`s tried the scart lead with 3 diff tv`s
then there might be a problem with the motherboard i would imagine???

[amigagr]

oh boy... the amiga has connected with rf and rca but yes finaly the problem maybe is from the motherboard but only the in the composite/rf part as the rgb output works ok with monitors as SteveSMS already said

[SteveSMS]

Hmm then i'll have to replace the mobo...

The guy i bought it from said he would replace the mobo (i emailed him about it:) )

But, if anyone knows a better solution or knows what it is, that would be better

Anyway, thanks for your help, guys... I really appreciate it.


Greets,


-Steve

[CDE_MusiX]

Try to use a RGB tv cable. (If there exists)

[amigakit]

Hi Steve,

Welcome to Amiga.org!

Here are your options to bypass the in-built modulator:

1. Replacement TV modulator which will connect to the 23-pin RGB socket
2. Scart to RGB cable again connect to the 23-pin RGB socket
3. Scart to AV cable (connects to the yellow AV connector)
4. Flicker Fixer/Scandoubler to connect to PC Monitor
5. SVGA to RGB adapter (same as 4. but only VGA frequency modes)

Hope this helps!

EDIT: I see that option 2. is a no go as you dont have SCART and composite exhibiting the same problem.

[Tomas]

First make sure that the cable is alright, if that is the case, then you could just get one of those tv modulators that orginally comes with the a500. I am sure you can find one for cheap on a auction site or similar. The modulator converts the signal from the rgb port to both composite and rf. http://www.ntrautanen.fi/computers/commodore/images/amiga/a520.jpg

For using a vga monitor you can get a flicerfixer, which will both convert the rgb into standard vga and will double the refresh rate, so that it will be compitable with most monitors. http://amigakit.leamancomputing.com/catalog/product_info.php?products_id=414

[Tomas]

But, if anyone knows a better solution or knows what it is, that would be better

Even if that is the case, it will probably work with such a tv modulator or flicker fixer or a amiga monitor using the rgb port.

The best way would be to test it out with someone elses amiga monitor or similar.

[Voicer]

Hello,

I have same problem, same weird image on my TV. Cable is ok, and for now any other option (than using that RF modulator) isn't possible.

I figured out, that when i try to slighly move that RF up/down, for few seconds tv output fixes, so it looks like some kind of failure inside modulator?  

[CLS2086]

It seems like a ground problem, or a capacitor dead, or a dying Power Supply Unit ...
So check that quickly, these are very commun electrical problems and can cause this on your screen.
Have you tried to unplug your floppy drive and HDD as they draw lot of power ?

I still wonder why people use RF or composite connnector nowadays. Since January 1st 1980, most new TV and 15 Khz European monitors were equipped with a Peritel/Scart/EuroConnector with RBG + "nationnal" composite entrance (PAL or SECAM), then in 1986 all new TV must had been equipped with, It also become to be used in Japan and others Asian countries, and in 1990 all have to support PAL (and also SECAM for France) color systems...
At the same time, it also arrived in Africa.

Do you live in these primitives rebel countries like the USA or Australia ?   :lol:

[Voicer]

nah poland, and i use tv which is older than me i guess... '70 or something like that, just because it was my first "screen" (and because i don't have any other free for now)

Anyway, i rip everything into pieces, cleaned up, etc... I didn't saw anything unusual, and when i put this stuff together again... it works, so i fix it by accident

Its possible that its voltage problem, because i use floppy power for 3,5 hd inside... but for now everything is ok

[Boot_WB]

Bizarrely, having just connected the composite out of my Voodoo3 from PC to a TV I find this gives a black and white signal also.  
I am plugging it into a composite in (AFAIK) AV socket, there is no seperate input for chroma etc.  

Weird, or is it just incompatible?

[Tomas]

I still wonder why people use RF or composite connnector nowadays. Since January 1st 1980, most new TV and 15 Khz European monitors were equipped with a Peritel/Scart/EuroConnector with RBG + "nationnal" composite entrance (PAL or SECAM), then in 1986 all new TV must had been equipped with, It also become to be used in Japan and others Asian countries, and in 1990 all have to support PAL (and also SECAM for France) color systems...

Probably because the amiga was never bundled with such a cable and the fact that you have to buy a special rgb to scart adaptor cable from a special shop selling amiga items.

I find it really weird myself that even the a1200 came without one.

[SteveSMS]

Mine is ok. Got a new TV set  :lol:

[Stedy]

Hi,

I have found with some video equipment, I have had to increase the active video from 0.7V to 1.0V for the monitor to receive a decent signal, otherwise the signals tears, similar to the pictures shown. I built a variable gain video amplifier to achieve this but there must be ready made composite video amplifier available.

The other possible issue is incorrect cable type, using 50 Ohm cable into a 75 ohm load, reduces the signal by one-third giving weird effects. Proper video cable should be 75 ohms by the way.

Ian