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SHARP XM-1801 issues
clanggedin:
I just finished a cap kit on both monitors in my Nintendo Red Tent cabinet. I also used siliconed the flyback on one which had a crack in it and it's still drying.
I plugged the other mintor into tha cab and powered it up and it works fine except the is a buzzing noise coming from it. It is not coming from the speakers either. It's coming from the back of the monitor. It is not the same sound the other one has when the flyback was cracked. It's just a buzzing sound, but it's very noticeable.
What have I done? Is there something I didn't plug in all the way? Have I cracked something??
The game and screen look great, it's just the annoying buzzing noise that I need to figure out.
Should I pull the monitor back out and check all of my solder points? Or is it something else?
Ken Layton:
Probably the metal cage around the flyback or that clear plastic flap attached to the cage. Double check placement of the wiring harness. Also be sure you did a nice neat job of soldering and that all assemblies/covers removed during the capkit have been properly secured.
One other thing: Is the suction cup (anode connector on the picture tube) securely connected underneath the suction cup?
clanggedin:
I removed the flyback cage completely on the monitor as well as the plastic flap attached to it. You had said something about the cage keeping too much heat in, so I removed it entirely.
Should I put the cage back on??
Ken Layton:
No, leave that cage off. It will help to extend the life of that unavailable flyback. Be sure you wrote the model information that was on the side of that cage down somewhere on the monitor for some future repair tech's information.
clanggedin:
OK.. I pulled the monitor back out and checked all of the solder points and everything looks fine. I also doubled checked that the neckboard was connected securely. When I plugged it back in this time I noticed that there is one of those lines you get on your TV sometimes if someone plugs in a vacuum cleaner or blender when you are watching TV. It's faint but it changes the black around it to a slight red as it moves down the screen.
I used a cardboard tube to see where the noise is coming from and it appears to be coming from the neckboard itself. Would a cracked board cause this??