G07 CBO No B+ present

freeplayinc

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Well my Crystal Castles monitor just died, I have voltage going to the chassis but no B+ voltage so where should I start, I looked for a troubleshooting guide with no success so any help would be appreciated.
 
After we check those, let's see if we can drag out another 35 page thread on this topic. Does anyone here use the search function?

You just want to tell him it's a blown yoke now, or do you want to wait a few pages... ;)
 
Both fuses are good, I did use the search but found nothing related to no B+ just high B+

Blown Yoke.... really, I have another tube I can test on I'll give it a shot :)

Thanks everyone for the help!!
 
Both fuses are good, I did use the search but found nothing related to no B+ just high B+

Thanks everyone for the help!!

Check R902, R902, and look for cracks and cold solder.

Do you get ANYTHING on either side of the big white resistor on the side?
 
I'll need to pull the chassis again to look for cold solder joints on R902 & R902, No voltage at either end of the big white resistor. anything else I should check before I pull the chassis again?
 
Ya I figured that was next, but I did think any of the caps that are included in the kit would cover the B+ problem.
 
Well I ordered the kit, I found the flow chart and started over looking and the F901 was blown, I did the beep check in circuit and forgot that was not going to be accurate :)LOL

Now the HOT is open on beep test and reads 1.823 on diode check is this in range? flyback looks good with no cracks but still could be bad so should I just replace the flyback & hot and install the cap kit and hopefully call it good:) LOL

BTW; the R902 is 2.2 OHM out of circuit.
 
This post is for the OP but also anyone that searches for G07 repair in the future: if the flyback is original when you cap it, REPLACE THE FLYBACK TOO.
 
Make since to me!! I sent Bob Roberts an email, I never ordered from him before but his prices are great!! I have another G07 chassis so I'm going to do the full BR flyback kit to both and hope to get a spare work chassis so I wont be down next time:)

Thanks everyone who posted!!
 
Okay, Bob Roberts Flyback kit arrived today!! I installed everything and I'm back up and running!! Thanks everyone for the help!! B+ is a solid 120DC!! Off to play my Crystal Castles!!
 
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