Finch
New member
Here's an amusing tale.
Recently repaired a G07. It's the first arcade monitor I've ever owned, it's the first monitor I've ever tried to repair and only really my second experience with using analog RGB+S hooked up to a CRT, so with very little experience I embarked on a full cab repair.
So I have the monitor working again, I turn the brightness up and I've got raster. I check B+ and get it adjusted to as close to 120v as I can get it. I look around for something to hook up in order to test this possibly working monitor. Consolized Neo Geo won't work because it has resistors on the RGB lines in order to hook up to my Sony PVM, so I go for my RGB modded Sega Genesis.
So I figure the Genesis is fine as it's the right resolution, it outputs RGB, and it works on the PVM. I hook it up and get crazy scrolling slanted image. WOW, something must not be adjusted right! I start tweaking knobs on the back of the chassis. Much tweaking of Vertical Hold gets something that looks like it might not be scrolling vertically anymore. So I start on H.FREQ next and I'm sitting there, arm in the cab trying to make the ABSOLUTE smallest adjustments possible to get the screen to not scroll horizontally. I feel like I'm getting close but every tiny indistinguishable little nudge on any pot is a world of difference and I can't get the damn picture to stay put. About this time I'm thinking anyone who tried to do this must be totally crazy. I have Sonic the Hedgehog screens slowly scrolling vertically and horizontally slowly across the screen....I'm annoyed.
Then I accidentally knock the sync line out of my little SCART adapter.....the screen is exactly the same. IT NEVER HAD A SYNC LINE. Now most of you would know this immediately.....but I've never done this before, so I had no idea what no sync signal looked like, and I just spent a good hour trying to get a clear picture out of a monitor with no sync signal.
I give in, Plug in the Neo Geo and turn off all the lights, sure enough, there's the crosshatch pattern, perfectly aligned and a small tap on V.HOLD gets it to stop jumping around and everything looks perfect (save for being very dim from the resistors on the RGB lines). I'm now thinking that the Genesis Syncs on green, and the PVM is smart enough to just pick this up where as the G07 isn't made for combined sync.
So I have a working monitor, and I feel like an idiot, but all is well as my monitor adjusting and repairing are done for this project and I can finally finish up everything else.
Recently repaired a G07. It's the first arcade monitor I've ever owned, it's the first monitor I've ever tried to repair and only really my second experience with using analog RGB+S hooked up to a CRT, so with very little experience I embarked on a full cab repair.
So I have the monitor working again, I turn the brightness up and I've got raster. I check B+ and get it adjusted to as close to 120v as I can get it. I look around for something to hook up in order to test this possibly working monitor. Consolized Neo Geo won't work because it has resistors on the RGB lines in order to hook up to my Sony PVM, so I go for my RGB modded Sega Genesis.
So I figure the Genesis is fine as it's the right resolution, it outputs RGB, and it works on the PVM. I hook it up and get crazy scrolling slanted image. WOW, something must not be adjusted right! I start tweaking knobs on the back of the chassis. Much tweaking of Vertical Hold gets something that looks like it might not be scrolling vertically anymore. So I start on H.FREQ next and I'm sitting there, arm in the cab trying to make the ABSOLUTE smallest adjustments possible to get the screen to not scroll horizontally. I feel like I'm getting close but every tiny indistinguishable little nudge on any pot is a world of difference and I can't get the damn picture to stay put. About this time I'm thinking anyone who tried to do this must be totally crazy. I have Sonic the Hedgehog screens slowly scrolling vertically and horizontally slowly across the screen....I'm annoyed.
Then I accidentally knock the sync line out of my little SCART adapter.....the screen is exactly the same. IT NEVER HAD A SYNC LINE. Now most of you would know this immediately.....but I've never done this before, so I had no idea what no sync signal looked like, and I just spent a good hour trying to get a clear picture out of a monitor with no sync signal.
I give in, Plug in the Neo Geo and turn off all the lights, sure enough, there's the crosshatch pattern, perfectly aligned and a small tap on V.HOLD gets it to stop jumping around and everything looks perfect (save for being very dim from the resistors on the RGB lines). I'm now thinking that the Genesis Syncs on green, and the PVM is smart enough to just pick this up where as the G07 isn't made for combined sync.
So I have a working monitor, and I feel like an idiot, but all is well as my monitor adjusting and repairing are done for this project and I can finally finish up everything else.