G07 fuse blown issue...

CalifTom

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I have a DOA G07 that is being used in my Joust U/R. I did a cap kit, flyback and hot replacement. I blew the F902 fuse on power up. After checking all of the recent component installations for correct alignment, everything checked out. I did a search to see what would cause the F902 to blow and found this repair info. (I edited my post, the fuse that blew was the larger one F902)

http://www.pinrepair.com/g07/

I checked the HOT with the diode setting on my DMM and it reads 001 and beeps (DMM has diode test and continuity on same setting). When I disconnect the yellow wire I get 069 reading. If this sounds like the HOT is good, why is it showing 001 when the yellow wire is connected?

I also checked to see if there was any continuity between the case of the HOT. There is no continuity.

Does anything sound as if it is connected wrong?

What would you suggest I check next?

Because of my beginner status, could you please describe for such. Thanks.
 

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How are you checking the HOT?...black lead to ground and red lead to the case of the HOT? If so, those readings you posted are bad.

Edward
 
How are you checking the HOT?...black lead to ground and red lead to the case of the HOT? If so, those readings you posted are bad.

Edward

In the pic shows how I am testing the HOT and the reading I am getting.
 

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You test a HOT how I described before. The way you're doing it....all you're reading is the winding of T501 (which is almost nothing).

Edward
 
You test a HOT how I described before. The way you're doing it....all you're reading is the winding of T501 (which is almost nothing).

Edward

I retested the HOT with the black lead on the ground and the red lead on the case of the HOT and my reading is 1880. Does this sound correct? If so, what do you suggest my next step is? Thanks.
 
Yes, that looks good. Are you sure F901 (the smaller of the two) is blowing? The only reason I ask....pretty much, only a couple things will blow that fuse....a bad flyback or a blown HOT.

Edward
 
Yes, that looks good. Are you sure F901 (the smaller of the two) is blowing? The only reason I ask....pretty much, only a couple things will blow that fuse....a bad flyback or a blown HOT.

Edward

Sorry, the larger fuse F902 blew not the smaller of the two after the cap kit, flyback and HOT replacement. My mistake I thought the larger one was 901. What do you suggest I check now?
 
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Sorry, the larger fuse F902 blew not the smaller of the two after the cap kit, flyback and HOT replacement. My mistake I thought the larger one was 901. What do you suggest I check now?

Is it running through the isolation transformer?
 
You need to solder your HOT correctly.

The wires need to be balled at the ends of the HOT leads.

So if I understand you correctly, if the wires are not soldered at the ends of the HOT it will/could blow the F902 fuse and not work. After I resolder the wires correctly, I should be able to test the monitor again?
 
Thanks for all of the help Dokert, Elutz, Modessitt and 80scoinop. I need to order a few parts and I will report back on my progress. You are the best!!!
 
So if I understand you correctly, if the wires are not soldered at the ends of the HOT it will/could blow the F902 fuse and not work. After I resolder the wires correctly, I should be able to test the monitor again?

Well, I respectfully disagree with Brother Dokert a bit. The wires don't need to be right at the end of the HOT leads. They just need to be attached in a way that doesn't short against the side wall, the other lead, or the mounting base.

And your wires seem to be going to the correct legs of the HOT. If you're blowing the big fuse, I'd like to see some pics of the VR (outside pic) and the way it's hooked up (inside pic)...
 
And your wires seem to be going to the correct legs of the HOT. If you're blowing the big fuse, I'd like to see some pics of the VR (outside pic) and the way it's hooked up (inside pic)...[/QUOTE]

Hopefully these are the pictures that you requested. If they are not of the VR could you please point me in the right direction.
 

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