Looking for theories on a bad Sanyou 20EZ chassis

Black Matrix

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Looking for theories on a bad Sanyo 20EZ chassis

Hey all,
Been working on a Sanyo 20EZ. Its pretty much dead. No picture, no HV static upon power up, no neckglow that I could see.

So here's what's been done. When I first started, I believe it had a filter cap with the side blown out. The chassis was also missing the power chord and one or both of the fuses was missing. Also, the flyback looked suspect and the HOT was shorted.

Its been fully capped, had the filter cap replaced, b+ pot replaced, flyback replaced, HOT replaced, and the fuses replaced.

Upon power up, its still dead as a hammer, but the B+ is registering 7.8 volts dc approximately.

So does anyone have any suggestions. I've fixed about everything I can think of. And my patience with this thing is wearing pretty damned thin.

Your advice would be extremely appreciated.
 
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Not yet, will it keep the HV section from working at all. I kind of think that's whats going on. And while I'm at it, is this a good chip to socket since it looks like I have to replace it anyways.
 
yes it will also check the 2sd1090.

check to see if you have any cracked traces on the chassis.
they crack very easy.

Peace
Buffett
 
And if you don't put in the 300 mA fuse, you only get 8 volts at the B+

Well,
I've proved once again that I am a dumbass. After going back to look at this monitor yet again(finally got the gumption up), I found that I had indeed forgot to put the 300mA 20mm fuse in. I could have sworn I had already done it, but it must have been another monitor. Anyways, I fired it up and heard the familiar crackle of static....but still no picture. so I check the B+ and we're setting around at a toasty 139.x as it fluctuates a bit. I think its adjustable but it didn't drop below 138 while I was turning the B+ and I think it went right back up. So my guess is that I'm in over voltage protection shutdown.

I have already ordered one of Riptors IC601. Can anyone verify that a 2SD1090 can be substituted with a STWH13009 or STW13009 transistors. I think that's the info I got on the neenerweb. But someone that's more familiar with it could probably verify that they are indeed substitutions. If they won't substitute, does anyone know of a source for the 2SD1090 transistors as I may very well need one....according to the flow chart.
 
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