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Please help!
Question from Chris: I got an Midway NBA Hangtime cabinet. It has been great for years and awhile back the colors began to mess up. The best way I can explain it is that the reds in the screen were gone, so it’s very dark and things that should be red are dark and very faint. It’s not the color settings so I’m assuming its an issue with the monitor or chassis (I believe it’s called). If you can help I would appreciate it. I would give the repair a go myself if I just knew what to do.
1 answer
Response from Jonathan: Chris,
Sounds like you might be having some problems with the red input wire coming from the board to the monitor. We recommend tracing this wire from the harness to your monitor chassis to see if it’s making a good connection. Since NBA Hangtime is a JAMMA game, you can use these JAMMA pinouts to find where the Video Red wire is on your harness. You can use the continuity check on your multimeter to see if the wire has any breaks in it. Check out our post on Checking Fuses With A Multimeter for more information about continuity. If the wire is making a good connection, you might try touching up the solder on the back of the red pin on the monitor chassis. These pins like to come loose sometimes especially after years of unplugging and plugging in the connector.
If the red input wire is making a good connection on both the harness and the monitor connector ends but the problem continues then you may have an issue with a color drive transistor. It could be that your red drive transistor has gone out on your monitor and needs to be replaced. Check out our post on Checking A Monitor Tube for information about color drive transistors. Of course, there could be other things causing this problem but this information should give you a good starting point.
Hope that helps. Thank you for your question and good luck with your repair.
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