Denial

This is a basic "demo" called "Smile Bounce". Lame name, but this is my first foray into assembly for the 6502. I had a Vic 20 when I was a teenager for a brief period (still have one, but it need repair), but never was able to fully utilise it, stuck with only basic. This progra...

Hmm, C8 doesn't look too healthy... Yep. It's a good idea to replace C8 without much ado. As first measure indeed before you proceed with the next step: For FB9, I get 4.96V on DC and 9.9V on AC. That doesn't seem right for the AC measurement, but I tried it a few times at both resolutions the mult...

Hmm, C8 doesn't look too healthy... Yep. It's a good idea to replace C8 without much ado. As first measure indeed before you proceed with the next step: I probably should have done that before starting, as I noted its suspect appearance. There are a couple of other ceramic capacitors which also loo...

Will check back re. schematics. O.K. - please take your multimeter, and measure the voltage, with the black cord attached to the RF box (i.e. ground), and the red cord attached to the top of FB9 . FB9 supplies the common collector voltage of Q1 and Q2, and it is the one of two components positioned...

Thank you for your reply. I have read your thread concerned this on Lemon, a few questions: Is this a PAL or NTSC machine? PAL [*]VIC1001 motherboard (original 2-prong), "main" 2-prong or CR version? I believe CR version. Specifically, it is the VC-20, the German variant. [*]Do you own a m...

I have a Vic 20 that displays no image. I know that the composite cable and powersupply are good (they work on other machines) and that the powersupply outputs correct voltage. The problem is specifically the lack of image. When the machine turns on, there is a brief flash, but nothing is displayed....