Mein erster VC20 (Oder: Ugh! Kann man bei dem Bild noch was machen?)

Jupp, die AT-Briefmarken sind in der Tat mächtig gewaltig. War auch überrascht. Vielen Dank kinzi.

War bei mir auch heut' in der Post. Muss eh gleich noch eine Reichelt Bestellung machen. Bauteile habe ich eigentlich genügend vor Ort, nur der Poti und der 2,7K Ohm Widerstand davon habe ich nix da.

Bobbel : Hast Du da schon eine Teilenr. für den R10 1K-Widerstand. Das müsste ja so ein regelbarer sein, richtig? Ich muss da immer mit der Reichelt-SuFu kämpfen.

Müsste dieser sein

https://www.reichelt.de/praezi….html?&trstct=pos_0&nbc=1

merci

Den "Kaiser Karl" hat der Postmann aufgeklebt, der hat meine "Massensendung" dazu genutzt, seine Briefmarken abzuverkaufen, weil sie ihm im Wege waren. Mir war's egal, ich musste ja nicht schlecken.

Hi all,

I just found this and have made up a PCB - I'm struggling with making up a cable to connect it to the component in on my TV - I get sync but no picture?

I replaced the VIC20 video DIN for a C64 8 pin type socket and cut the extra 3 pins off. I connected the 2 pins from the PCB to ground, and one of the 3 pins spare on the video connector (pin 6). I made up a cable and connected 2 RCA phono between ground and PIN 5 (Vic Video) and PIN 6 (from the PCB) and connected them to Luma and YP/CR

I changed the jumper to the position to route Luma through the PCB, and I get sync but a black screen?

Maybe I'm building the cable wrongly?

Any help?

Thanks,

KbJ

Quote from kbjunkie

I get sync but no picture?

If there is sync the signal path is OK, sync comes with "luma".

Looks like your VIC 20 does not start and produces only a black screen.

What EXACTLY have you done? Which traces did you cut, if any? Where did you solder what?

Please provide some images.

Hi Kinzi,

Thanks for the reply

I haven't cut any traces at all - I made up your PCB with JLCPCB and put it together. I put the 6561 into your PCB and put the PCB in the 6561 socket on the motherboard.

If I change the jumper and connect a comp video cable to the Vic-20 output, I get a standard composite Vic-20 picture (The Vic-20 does boot fine). If I put the jumper towards the outside of the board, I get a clearer picture that's a bit washed out but it goes on and off like my TV can't sync properly. If I connect the 2 RCA cables to YP/CR and Lum on my component in, I get sync but no picture..

The RCA jacks are connected to an 8 pin DIN (I changed the socket for a C64 with 8 pins, cut off the 3 pins your suggested and connected the output of your PCB to one of the unused pins).

Thanks,

KbJ

Quote from kbjunkie

If I connect the 2 RCA cables to YP/CR and Lum on my component in, I get sync but no picture..

The output is S-Video (Y/C), not component (YCrCb/YPrPb).

You need a TV set or monitor with Y/C (aka. "S-Video") input. Is yours capable of displaying S-Video?

Quote from kinzi

Quote from kbjunkie

If I connect the 2 RCA cables to YP/CR and Lum on my component in, I get sync but no picture..

The output is S-Video (Y/C), not component (YCrCb/YPrPb).

You need a TV set or monitor with Y/C (aka. "S-Video") input. Is yours capable of displaying S-Video?

Ahhh.. I'm afraid I'm not up on video standards.. I take it that I'm looking for 2 phono sockets on the back of my TV for S-Video then.. I was confusing it with the 3 component sockets..

thanks,

KbJ

Quote from kbjunkie

Ahhh.. I'm afraid I'm not up on video standards.. I

No problem.

Quote from kbjunkie

thanks,

You're welcome.

Come back to report success.

Hi kinzi,

Thank you for your very kind help - I can now report that I have a Vic-20 with a very nice S-Video output

One thing though - How do I get audio out to the T.V? Do I just take another phono and connect it to the video output (Pin3?) and connect that to that audio in?

Cheers again! Very happy with your excellent PCB mod!

KbJ

Quote from kbjunkie

One thing though - How do I get audio out to the T.V? Do I just take another phono and connect it to the video output (Pin3?) and connect that to that audio in?

See https://www.c64-wiki.com/wiki/A/V_Jack ...

Yes, VIC-20 has "Audio Out" on Pin 3 of the DIN jack. Just connect it to "Audio In" of your TV set. The signal level is already right. So you will end with a cable "DIN 5-pin" to three times RCA jack (Luma, Chroma, Audio Out).

Quote from kbjunkie

Cheers again! Very happy with your excellent PCB mod!

Glad it works now. Have fun.

Hello.

I was hoping this type of S-Video mod would exist. I have seen the others but a PCB-based solution is much cleaner.

Does anyone have spare PCBs already made or would I have to order from a PCB fab?

I have seen the archive contents. I am afraid I am not good at identifying the necessary components by photos or schematics alone. Is there a Bill of Materials available?

Quote from jdryyz

Hello.

I was hoping this type of S-Video mod would exist. I have seen the others but a PCB-based solution is much cleaner.

Does anyone have spare PCBs already made or would I have to order from a PCB fab?

I have seen the archive contents. I am afraid I am not good at identifying the necessary components by photos or schematics alone. Is there a Bill of Materials available?

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Ich habe komplette Bausätze, muß sie aber erst im Marktplatz einstellen

Quote from Retro Ronny

Quote from jdryyz

Hello.

I was hoping this type of S-Video mod would exist. I have seen the others but a PCB-based solution is much cleaner.

Does anyone have spare PCBs already made or would I have to order from a PCB fab?

I have seen the archive contents. I am afraid I am not good at identifying the necessary components by photos or schematics alone. Is there a Bill of Materials available?

Display More

Ich habe komplette Bausätze, muß sie aber erst im Marktplatz einstellen

Display More

Great! I haven't used the Marketplace before. Let me know what the next step is.

Thank you.