WG6100 has the jitters on the left side of the screen (Gravitar)- VIDEO

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WG6100 has the jitters on the left side of the screen (Gravitar)- VIDEO

I can't seem to figure out what the heck is wrong with the 6100 in my Gravitar. I have read every inch of the 6100 FAQ.

The monitor is all jittery on the left side of the screen and the right side isn't that stable either.

Mark Spaeth has been helping me but I don't want to keep bugging him. So, I'll crowd source this. :)

Here's a video:

http://www.youtube.com/watch?v=CfzUv-5eR8M

So far I have (some with Spaeth's help):

Replaced the Transistors
Capped the HV board
Reflowed Headers on the HV and Deflection boards
Replaced some of the connectors
Tested voltages (Spaeth helped me here, not sure what exactly was tested)

I am gonna change the Transistor sockets next. But after that, I don't know what to do. Got any ideas?
 
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all kinds of scewy things happen when the big blue capacitor needs to be changed.

thats where id start anyway.
 
Hard to tell from your video.... but any time there is instability in the picture you should begin with the voltage regulation circuits. Typically caps, but a flaky regulator can cause issues.
 
Just replaced the transistor sockets and the one cap I was missing from Bob's kit on the HV board and same issue. :(

I am officially out of ideas. Anyone?

Could it be my board?
 
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Just replaced the transistor sockets and the one cap I was missing from Bob's kit on the HV board and same issue. :(

I am officially out of ideas. Anyone?

Could it be my board?

I would test that 6100 in another cab if possible. I had a similar problem and it turned out to be a y size pot on the game board. I discovered the problem by tapping each pot on the gameboard. Strange troubleshooting technique I know, but it worked.

Kent
 
the glue they put on the pots can damage the pots over time. I'd start by replacing all the pots on your game board...
 
I did try the 6100 in Spaeth's Tempest and it was jittery on the left too. Not as bad, but still jittery.
 
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needed to be replaced anyway and probably 5 years ago too.

its nice to be able to cross potential problems off the "list".

we are gaining.

if i havent replaced ALL the electrolytic capacitors EVERYWHERE i can find them, then i would do that next. have they all been replaced on the monitor chassis? gameboard PCB?

check out that neck board for any cold solder joints. cant remember if theres a capacitor on the neck board or not.

did the screen wiggle before the LV2000 was installed? was the LV2000 installed as a fix?

no cold solder joints on the video wire harness pins? new pins installed on the connectors?
 
I did try the 6100 in Spaeth's Tempest and it was jittery on the left too. Not as bad, but still jittery.

Reality Check John, the monitor "IS" the main problem. Looking at the video, I would say that your LV2000 is failing on one side. Run back over to Spaeth's and grab a LV6100. I am very surprised he didn't suggest this to you when you were there at his place.
 
needed to be replaced anyway and probably 5 years ago too.

its nice to be able to cross potential problems off the "list".

we are gaining.

if i havent replaced ALL the electrolytic capacitors EVERYWHERE i can find them, then i would do that next. have they all been replaced on the monitor chassis? gameboard PCB?

check out that neck board for any cold solder joints. cant remember if theres a capacitor on the neck board or not.

did the screen wiggle before the LV2000 was installed? was the LV2000 installed as a fix?

no cold solder joints on the video wire harness pins? new pins installed on the connectors?

The LV2000 was installed when I got the game. So, I don't know the history.
 
Reality Check John, the monitor "IS" the main problem. Looking at the video, I would say that your LV2000 is failing on one side. Run back over to Spaeth's and grab a LV6100. I am very surprised he didn't suggest this to you when you were there at his place.

Mark checked the voltages on the LV2000 and said they looked good. But it still could be it. So...
 
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he dosent have the LV6100's ready yet
lol

They're ready... but unlike Dokert, I've been fixing 6100s for a long time and know that that wasn't the problem.

Note how he's only getting jitters on one axis... while power supply regulation problems would affect both axes... note also that it's affecting both sides of the screen, when (of course) a failing regulator would only affect one half of each axis.
 
Kinda looks like its half blooming....HV diode if it has one?? My omega race kinda did that.....

If it were 'blooming', it would affect the entire screen, not just one axis... and 6100 doesn't have a HV diode like B&W vectors... it's intergrated between windings of the flyback.
 
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