wg 4901 centering issue

joseph77

Well-known member
Joined
Jan 3, 2009
Messages
2,150
Reaction score
115
Location
Cicero, New York
I cannot get the picture on this monitor to center properly. I have tried multiple boards on it and all get the same picture as it will not center. I just capped this monitor last week and spent god knows how long trying to make every adjustment possible. Any thoughts?
 

Attachments

  • Shinobi.JPG
    Shinobi.JPG
    75.7 KB · Views: 15
Hey Joe, it looks like you're feeding a monitor with the opposite sync that it wants. Either you're feeding a positive sync monitor with negative sync or feeding a negative sync monitor with positive sync.

[edit]
Just looked up the WG4900 and it has both sync inputs... whatever you have the sync on now, try putting it on the other sync inputs...

attachment.php
 

Attachments

  • WG4900-sync.jpg
    WG4900-sync.jpg
    54.2 KB · Views: 32
Last edited:
Try swapping the sync as mentioned. I had the same problem with a k4900 in a Mario bros. I thought the inverter board was the problem...it was the sync once I moved it over a pin it was fine
 
Hey Joe, it looks like you're feeding a monitor with the opposite sync that it wants. Either you're feeding a positive sync monitor with negative sync or feeding a negative sync monitor with positive sync.

[edit]
Just looked up the WG4900 and it has both sync inputs... whatever you have the sync on now, try putting it on the other sync inputs...

attachment.php

That did it, thankfully it was something simple. I have not worked with much jamma stuff and forgot all about neg sync. Thanks guys.
 
Back
Top Bottom