Sanyo 20EZV Flow Chart

I haven't seen this specific topic discussed about the 20EZV's so I will put it here on the end of this thread...

I have had a couple EZV's in the past months trying to restore a Cyberball with both monitors missing... on two EZV's that I have tested, I have a blown F301. When I replace it, it is generally blows again... HOT is shorted on one and NOT shorted on the other, and FLYBACKs are showing no super apparent burns or cracks but they are black and super grody so it is hard to tell. These are pretty old, so I can see how it would be common for the flyback to be the main culprit... BUT... My actual question is this...

What typically happens when someone plugs one of these into a standard 120V wall socket... does it usually take out the HOT and FLYBACK or does it usually affect the B+ circuit and regulator?

I suspect many of these are broken from folks 'testing' by plugging it into a wall socket?
 
I'm missing a color. Suggestions? I can see green. I can see red when I turn up the pot. But there is no blue
Potentially a bad transistor on the neck board or a bad solder joint. Best advice I've read is to reflow everything on neck board and try again, then look at transistors. ✌️
 
I'm missing a color. Suggestions? I can see green. I can see red when I turn up the pot. But there is no blue
Try shorting each of the 3 neck board transistors to the frame. Only do it for a moment.

When you do this, the entire screen with fill with that transistor's color.

EDIT: Arcade Jason demonstrates this on a k4600 in the video below starting at the 8:30 minute mark.

 
Last edited:
Back
Top Bottom