Sanyo 20-EZ shakes

scottz29

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Here's what's been done so far...

Had jail bars, did cap kit + audio caps
After cap kit, monitor in HV shutdown, B+ at +137v. Pull out Dokert's troubleshooting flowchart...
Replaced B+ pot (VR601), Q901, and IC601
Monitor now stays on, but after about a minute or so, it begins to shake wildly...
B+ is sitting at +110-111v. Adjusting VR601 doesn't affect voltage much, currently pot is turned all the way down (left). Adjusting master brightness on flyback doesn't affect B+.
Monitor also does the hula as you can see in the video, but I replaced the filter cap (C606)!

Video of the current issue:


Ideas?
 
My Brother's Sanyo in his Mario Bros does this same thing. I recapped it, but have yet to replace the filter cap or adjust the B+ as I am still not sure where to test it. Damn, I was hoping the new filter cap would fix it for him.
 
I was watching the video and was thinking..... that is not too bad..... HOLY CRAP, demon possession!!!!

I have never seen a monitor do that before. Very odd.
 
My Brother's Sanyo in his Mario Bros does this same thing. I recapped it, but have yet to replace the filter cap or adjust the B+ as I am still not sure where to test it. Damn, I was hoping the new filter cap would fix it for him.
It does the hula, or has those crazy shakes?
HOLY CRAP, demon possession!!!!
Shortly after I moved my Satan's Hollow into my gameroom, I was working on some games. It was really late at night, like 3am-ish. Sometime in-between one of the times I left the gameroom and walked into my shop, my 4 year old daughter had gotten up from bed, quietly came downstairs, walked into the gameroom and stood next to the Satan's Hollow. I eventually came back from the shop, walked into the gameroom and as I rounded the corner I was greeted with a scene straight out of a horror movie. There, in the middle of the gameroom, stood a little girl in a nightgown, her head down, long hair covering her face, basking in the blacklight glow of a satanic-themed game. I jumped about 2 feet, and nearly shit an egg roll.

I sold the game shortly after.

Since then, all my monitors have been doing crazy shit like I have never seen monitors do before...
 
What an EZ fix this is.
Decaf! You'll be able to hold the camera still :eek:

Wow - so you have the ground plug in tact
Do you have the ground wire running from the ISO to the monitor and/or to the coin door and CPO?

While you're B+ is a tad high it would typically cause HV shutdown to occur.
The jumping like hell would lead me to believe you have a rogue pot on your hands.
 
My DK does that flag waving thing that yours was doing before the major shake happens.

DKJR does that shake that seems too vibert the hole machine?
 
I had the minor shakes with my dk monitor. I got the pot replacement kit from bob for 5 bucks and it's rock solid now. I also replaced the pots on the board. Damn these things have a good picture when they're working...

Mine didn't have the wave the video has though. That is a strange issue.
 
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Cold solder joint on either a new cap or an adjustment pot. Look for cracked traces while you are re-flowing the solder on all of the caps that you installed.
 
After a break to work on the basement some more...I'm back to fixing up some games. Dave, I reflowed solder on all my caps... and couldn't find any broken traces...

Still kinda at a loss with this problem... anyone?
 
Damn Scott this was almost 5 months ago, and my memory is only good for about ten minutes on a good day.

Remove the solder from the fly, and install new solder on the fly.
 
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