adamzero
New member
K7200 won't sync? Diagonal flipping... please help!
Hey Gang...I picked up a Double DK game that the previous owner had said the monitor wasn't working, probably the flyback.
I opened it up & I don't think it's actually a Double DK (or DK2), as it's just a little JAMMA board.
It had a new(er) style monitor (I haven't ID'd it yet, not the OG Sanyo, as this is just a JAMMA type setup) that was kind of hacked into place to fit in the cabinet, like they used tin snips to cut part of the monitor frame & the chassis was in place, but that part of the frame was starting to slip. I turned it on after everything looked ok (aside from the cut frame) and the flyback was just clicking & the game played blind.
I popped the monitor out... (this is the one that was in the game)
So, I had a spare monitor, a WG K7200 which needed a cap kit & a new flyback itself, so I got those from Bob Roberts and replaced the parts in question, reflowed anything that looked suspect and installed it in the DK Combo Double whatever...
And I can't seem to get the monitor to sync. The pot on the chassis for H Hold (or is it Pos?) gets it pretty close sometime, but is just starts flipping again. The pots on the remote only make slight adjustments & nothing really any better.
You can make out the elements of the game flipping by diagonally (I can sometimes get it so it's positioned correctly (vertically) but still flipping... and it doesn't last long as the flipping starts going diagonal.
Being JAMMA, I was thinking it would be negative composite sync, but it seems no matter if I hook the 2 sync (white & yellow?) to where the the other syncs are on the chassis, it doesn't seem to make a difference... either way, when the sync wires are connected or disconnected, the symptoms are the same...
Since the monitor that was in there only used the regular RGB(G)SyncSync type connector, I didn't modify the connection (from the JAMMA harness) at all.
The pins seem to be making fine contact to the wires (sync, colors, ground)...
Any help here?
If nothing else, I can put the first monitor back in after ordering & replacing the flyback on that one... see if that does it.
Hey Gang...I picked up a Double DK game that the previous owner had said the monitor wasn't working, probably the flyback.
I opened it up & I don't think it's actually a Double DK (or DK2), as it's just a little JAMMA board.
It had a new(er) style monitor (I haven't ID'd it yet, not the OG Sanyo, as this is just a JAMMA type setup) that was kind of hacked into place to fit in the cabinet, like they used tin snips to cut part of the monitor frame & the chassis was in place, but that part of the frame was starting to slip. I turned it on after everything looked ok (aside from the cut frame) and the flyback was just clicking & the game played blind.
I popped the monitor out... (this is the one that was in the game)
So, I had a spare monitor, a WG K7200 which needed a cap kit & a new flyback itself, so I got those from Bob Roberts and replaced the parts in question, reflowed anything that looked suspect and installed it in the DK Combo Double whatever...
And I can't seem to get the monitor to sync. The pot on the chassis for H Hold (or is it Pos?) gets it pretty close sometime, but is just starts flipping again. The pots on the remote only make slight adjustments & nothing really any better.
You can make out the elements of the game flipping by diagonally (I can sometimes get it so it's positioned correctly (vertically) but still flipping... and it doesn't last long as the flipping starts going diagonal.
Being JAMMA, I was thinking it would be negative composite sync, but it seems no matter if I hook the 2 sync (white & yellow?) to where the the other syncs are on the chassis, it doesn't seem to make a difference... either way, when the sync wires are connected or disconnected, the symptoms are the same...
Since the monitor that was in there only used the regular RGB(G)SyncSync type connector, I didn't modify the connection (from the JAMMA harness) at all.
The pins seem to be making fine contact to the wires (sync, colors, ground)...
Any help here?
If nothing else, I can put the first monitor back in after ordering & replacing the flyback on that one... see if that does it.
