Recent content by vizzinni

I appreciate everyone's time on this.... This is probably the 4th or 5th cap kit I've done in ten years. I'm not a master at soldering by any means, but know enough to go easy on the heat and keep it neat. I've got a nice Hakko desoldering gun and was easy on the pads when desoldering. I...

No, but I suppose it's worth a shot. Could installing the cap kit have triggered something that would be fixed by replacing the filter cap and adjustment pot?

There were some jitters and other minor things happening on my DK monitor so figured a cap kit might fix things. After I fired it back up this is what I saw. I've adjusted the B+ to 108vdc, and fiddled with all the pots on the remote board, neck board, and flyback with very little to no...

The one on the top center looks like a Rodotron 666. If the neck board isn't roached I'll take it. Can you post or PM a pic of the both sides of the neck board?

Weekend bump...

Need help fabricating a remote adjustment board, Neotec 550DX I've got a working Neotec 550DX without a remote adjustment board. I've found the 4-pin connector on the main board and tried wiring up 3 momentary switches (and ground) which got me into the on screen display but the navigation...

PM Sent....

FYI...I got a new IC9 from Rick and that appears to have solved my original problem. But now I have several others that I didn't have before. Looks like one of the video transistors is shot; the display was all red at first then I swapped a couple of the transistors and the now there's no...

For continuity's sake, I thought I'd keep the thread going until this is fixed. Traded emails with Rick, he recommended checking C84 and if that doesn't do it, replace IC9. C84 is supposed to be 115J/250v MPS (1.1uf 5% tolerance), which is surprisingly hard to find. A 824J/250v MPP had been...

The specs I have for the Rodotron 666 is that when in 15k mode the B+ ranges from 55v to 75.5v, depending on whether it's a 666A, B, or C version. The 31k ranges are from 100v to 140v. I'm assuming my board is a 666A given the adjustment ranges I'm seeing, in which case the B+ at 15k should...

Thanks for the reply Ed. 70vdc is the B+ reading when I've adjusted the pot all the way to the right, although I tried again later and it maxed out at about 74vdc. And yes, I'm aware of the impedance switch; it's set to 1k when trying 15k and on 75 when trying VGA.

bump.......

I could use some help troubleshooting this monitor. I think it's some sort of horizontal circuit problem, but I'm not sure. Rather than trying to describe it, I've posted a video on YouTube: https://youtu.be/cJ4ZUrg0ATA. It starts out OK but within 45 sec or so things start to go wrong, and...

Thanks much Ken. Don't know how I missed that...

Thanks...tried there, and Bob Roberts too. No luck. I'm trying Mouser and Digikey but not knowing the make/model of the connector makes it tricky...