Nanao MS9-29SU to high B+ voltage after recap - Help!

[wilyawn]

So I have a MS9 that had an unstable image so I decided to do a full recap. Ordered a capkit and changed every cap carefully noting the values and polarity of both the old and new cap.
Some of the new caps were higher voltage but as I understand that is ok. The Farad values were spot on.
When I powered it on there was only a clicking sound for a second or so and then the chassis turned off. Double and triplechecked all caps and even put the old back in but no success.

I isolated pin 2 of the flyback and put in a lightbulb as a dummy load and now the chassis stays on but B+ is 111volt at the lowest setting of the pot. I'm using 24KHz mode so I only adjust the 24 pot.

What could have gone wrong?

[grantspain]

put it onto 15k and then read b+ , should be about 74-76v adjustable

[wilyawn]

put it onto 15k and then read b+ , should be about 74-76v adjustable

When I put it in 15k mode b+ is 75v and I can adjust it down to 60v but when I take it off the dummy load and connect the flyback it skyrockets up to 130v and shut down. I dont think the flyback is faulty because I get static noise from the tube for a split second before it shuts down.
Does this make any sense? English is not my native language

[grantspain]

check the HOT, there are tons of things that cause ms9 to shutdown- any fault picked up on deflection or psu and they shut down

[wilyawn]

check the HOT, there are tons of things that cause ms9 to shutdown- any fault picked up on deflection or psu and they shut down

I assume this is the HOT to the left on the shield? I unsolder it tonight. How do I measure it?

BTW Thank you very much for taking the time to help me here Grant

[grantspain]

yes that is it, should read like a diode across 2 pins

[wilyawn]

yes that is it, should read like a diode across 2 pins

When I measure in diode mode I get a reading when touching it like this:


Any other way it read infinite. That should mean that the HOT is working, right?

Edit: I have also replaced the vertical ic (LA7837) and the power transistor or whatever it is called (K1531) for known working ones and still no change.

[grantspain]

no dead short means its ok

[wilyawn]

no dead short means its ok

Crap, back to zero then

Could a broken solder pad lead to this issue? If I broke any while changing capacitors.

[grantspain]

yes i expect it is something that you have done, lump of solder across pads, broken pads- something like that

[wilyawn]

yes i expect it is something that you have done, lump of solder across pads, broken pads- something like that

And sure enough it was.
I had placed the bipolar cap in a vacant location right next to where it was supposed to sit... Dumbass!

It was right in front of me the whole time and I could not see it. Lesson learned I suppose

[grantspain]

good work finding the issue

[wilyawn]

good work finding the issue

Thanks for taking the time helping me to narrow it down