Recent content by mikejmoffitt

Followup PM sent about Hyper SF2.

I got this Asteroids Deluxe a little over half a year ago in non-working condition. I've worked on the monitor to get it rock solid, rebuilt the power supply, capped the game PCB, and did general maintenance on solder points, etc. It could use a polishing of the top glass, and the rubber gasket...

Some ID: Sanwa OBSF-30, and one OBSF-30RG for the buttons.Sanwa JLF joysticks.

That looks like what happens when HV arcs. Make sure there's no schmutz near the anode cap. However, if there is an HV divider block (often a little red block) that can go bad and provide a possible arcing path. It could be the flyback itself as well.. As alarming as it may be, if you can get a...

going to replace the "winners don't use drugs" screens with COVID vaccination splash screens in all of my games this may be the only year where the marketing "no vax no CAX" can be used real talk, though - unless numbers are so miraculously good by that time, or they mandate that attendees are...

That arcing point looks like an intentional spark gap.

Those boards are 24Khz, and the MS8-26 supports 24Khz by means of changing the resolution header from "LOW" to "HIGH". You don't need any converter trash to make it work and look good

It is worth noting that near the line, the vectors start to slowly get "squished" in, so I am suspicious of the game PCB first. If the monitor had lost all positive Y deflection, I would have expected a hard cut after the line - the crossover point between the negative Y and positive Y is...

Looking for Demon's World / Horror Story by Toaplan.

It is worth noting that one of the transistors had gold-plated legs, and had held up pretty well, while the other did not and had a firm layer of oxidation. It would have been nice if both were gold-plated. It seems the caps should arrive today, so hopefully everything can be buttoned up soon...

I wrote above that I'm planning on replacing all of the capacitors, but they have not arrived yet. This is my first vector, but it is not my first game and certainly not my first monitor - I am not fumbling about in the dark randomly with this. I aggressively cleaned the legs of Q900 and Q903...

I'd reflow connectors and major through-hole components. Given that this problem is new after your recap, I'd say it is equally likely that 1) a part was inserted incorrectly / not soldered properly, 2) stray solder or soldering mistakes may be causing a problem, or 3) the PCB is mechanically...

Fixing that dodgy pin on the harness fixed the sensitivity to being handled, and when I got the monitor going I had no "breathing". However, it's still intermittent. More detail: My cap kit has not arrived, but I was impatient, so I pulled open the HV cage to see if I had any suitable caps on...

It looks to me like blanking is not occurring when it should be during retrace. If a monitor hasn't been gone over yet, I would do standard preventative maintenance before thinking too much harder about it (aside from the caps, which you have done already).

Is your video grounded? A very long indirect ground will not work in your favor, so make sure that is coming in alongside the R, G, B, and Csync connections.