DK Sanyo 20EZ Wavy Side

Do you have another monitor to check the game pcb on or another dk pcb to check on that monitor? That's a very interesting issue, I'd start looking through monitor for burnt parts or cracked resistors. Check for cold solder everywhere!
 
I recall checking the B+ voltage during my initial troubleshooting but do not recall what the value was, so I'll give that a shot & report back. thanks.
 
So I checked the B+ DC voltage from TP91 to ground. For a second it was around +120v but then jumped to 165v while I was adjusting it. I though I damaged the pot since I couldn't bring the voltage back down, so I just replaced that pot and still get 165v.

Sometimes I feel like I'm playing Whack-a-Mole, not DK. Any ideas?
 
Though I have skimmed that manual, you make the excellent point that I need to dig into it further.

Does "No Raster" translate to no image? I see in the 5-1 flow-chart a path if the TP91 voltage is 130v (though I'm getting 165v). I will also check the other voltage locations.
 
I replaced my B+ pot but when it didn't make a difference, I came to learn that I should not have plugged the monitor directly into an outlet. I moved it back to the cabinet power supply and got 110v. The pot barely does anything and I can't get it to 108v but the wave is gone.

Unfortunately I now have new problems. I'm reminded of the 'if you're in a hole, stop digging'. I've read the service and troubleshooting, and that nice flow chart, but I don't know how to define what I'm seeing. Any help is much-appreciated.
 

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Agreed. Just need to find someone who does these repairs. I had used a local place a couple of times, but no surprise they closed up shop.
 
Solved!!!

I can take zero credit for this fix. Buffett saved the day! I sent him the Sanyo 20EZ boards. He replaced the caps, VR451, & IC601. He then posted a YouTube video of the test patterns from my boards. What service!

In case someone else has the same issue, I would guess it's the pot &/or the IC, since I already did a cap replacement.

I cannot recommend his services enough. Thanks to all for their help.
 

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That's a fine looking monitor you have there.

Peace
Buffett
Awesome work Buffet! I have a friend in Texas who I'm recommending he send his Sanyo ez20 chassis to you. He's capped it. Replaced b+ pot and The IC and still can't get the hv to adjust down from 144v. Crazy we've been through everything on the flow chart and all the threads in here and no progress.
 
Awesome work Buffet! I have a friend in Texas who I'm recommending he send his Sanyo ez20 chassis to you. He's capped it. Replaced b+ pot and The IC and still can't get the hv to adjust down from 144v. Crazy we've been through everything on the flow chart and all the threads in here and no progress.

no prob, happy to help.

have him email me and lets get it fixed.

Peace
Buffett
 
BTW, my monitor is now even sharper than the image I posted after Buffett's repair, because I must have knocked the convergence out of alignment at some point. Now it's fixed!
 
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