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VIDEO Problem with VIC-20 NTSC
Posted: Wed May 07, 2014 10:51 am
by Sid1968
Hello,
i have a problem with my "new" VIC-20 NTSC. I use it in germany with a standard german powersupply. Same that i use with VIC-20 PAL.
OK. This is what i got:
- Original VIC-20
- 01.jpg (451.25 KiB) Viewed 1617 times
Now i changed the electrolytic Capacitors and added the S-Video Mod.
- The Board with new electrolytic Capacitors and S-Video Mod.
- 02.jpg (460.25 KiB) Viewed 1617 times
S-Video MOD works, but the Video error is the same:
- Video-Output with new electrolytic Capacitors and S-Video Mod.
- 03.jpg (246.64 KiB) Viewed 1617 times
Any idea what is wrong with my VIC-20?
Re: VIDEO Problem with VIC-20 NTSC
Posted: Wed May 07, 2014 11:12 am
by Kweepa
Interesting. It looks like stripes of the same character are randomly written into screen memory.
Doesn't seem like a video error...?
Re: VIDEO Problem with VIC-20 NTSC
Posted: Fri May 09, 2014 8:55 pm
by Imperious
Looks like a faulty Character Rom to me.
From Ray Carlsen's repair info
UD7 901460-03 ROM CHARACTER
Startup screen characters missing (just blocks or flashing lines where
characters should be) and alphanumerics missing from games. Game carts that
use mostly graphics characters may look normal while running
Re: VIDEO Problem with VIC-20 NTSC
Posted: Wed May 21, 2014 6:10 am
by Sid1968
I solved the problem. If you are interested look on our webside. Its writen in german.
http://orecc.dd-dns.de:8088/mybb/showthread.php?tid=1
Re: VIDEO Problem with VIC-20 NTSC
Posted: Mon May 26, 2014 1:57 pm
by joshuadenmark
I've had german in school
super guide and pictures, huge thanks for taking the time sharing this.
Re: VIDEO Problem with VIC-20 NTSC
Posted: Mon May 26, 2014 2:08 pm
by Sid1968
Thx.
Maybe the nongerman folks can use
http://translate.google.com
Re: VIDEO Problem with VIC-20 NTSC
Posted: Mon May 26, 2014 5:13 pm
by metalfoot76
So just a cold solder joint? That's not too bad a fix then.
Re: VIDEO Problem with VIC-20 NTSC
Posted: Tue May 27, 2014 2:45 am
by Sid1968
I bought this one and another one (That have the SHIFT-LOCK Problem - read in this forum) for together 60 EUR.
The seller told me that both "VIC-20 NTSC made in USA" were never in use! They really look like they are completly new!!!
But the long storage time may result in that problem. My other VIC-20 had problems too, that resulted in a keyboard problem. I could fix that,
but the "SHIFT-LOCK Problem" is not solved at all.