Hi there!
Have recently purchased a Vs SMB pcb, which works fine, but has terrible image. Lots of ghosting and jailbars like artifacts.
It came with a hand made inverter and amp board. I have tried to solder 5v, gnd, r, g, b, video gnd, and sync directly to the Jamma connector, to see if the inverter board could be the issue, but all I get is a black screen, or lighter if I dial up the brightness, but no visible image.
On the main pcb, C8 seems missing, although I don't know what it's for, and not all board revisions seem to have it at all, if I google some photos.
Some photos of the pcb, inverter board and image on the monitor can be found here:
https://photos.app.goo.gl/GEDKJFm2jpf9ns6a8
In real somehow ghosting and jailbars look much worse than on photo by the way.
I could try and order a new inverter/amp board, but it's kind of pricy just as a test so would be great if I could localize the problem somehow. Anyone who's seen this before, and might have any directions on what to check or which route to go?
Many thanks, Bart.
Have recently purchased a Vs SMB pcb, which works fine, but has terrible image. Lots of ghosting and jailbars like artifacts.
It came with a hand made inverter and amp board. I have tried to solder 5v, gnd, r, g, b, video gnd, and sync directly to the Jamma connector, to see if the inverter board could be the issue, but all I get is a black screen, or lighter if I dial up the brightness, but no visible image.
On the main pcb, C8 seems missing, although I don't know what it's for, and not all board revisions seem to have it at all, if I google some photos.
Some photos of the pcb, inverter board and image on the monitor can be found here:
https://photos.app.goo.gl/GEDKJFm2jpf9ns6a8
In real somehow ghosting and jailbars look much worse than on photo by the way.
I could try and order a new inverter/amp board, but it's kind of pricy just as a test so would be great if I could localize the problem somehow. Anyone who's seen this before, and might have any directions on what to check or which route to go?
Many thanks, Bart.