Audio issue a couple of weeks after Moreplay Upgrade [resolved]

[Galluch57]

Moreplay Upgrade Pic 1

[Galluch57]

Moreply Upgrade Pic 2

[Galluch57]

Moreplay Upgrade Pic 3

[Paul Birkeland]

Can you measure 6 and 16 with the tubes we provided?

[Galluch57]

6U - 172.6v
16U - 172.6v

[Paul Birkeland]

Can I see what the bottom of your upgrade board looks like?  You should just be able to pop off the connections on the front of the board and bend it up. 

[Galluch57]

Here's the best I could do with the angle.

[Galluch57]

Another

[Paul Birkeland]

I think you have some cold solder joints.  You can leave the joints for the LEDs alone, but everything else should be reheated and flowed out.

[Doc B.]

Looks to me like the leads at the banded ends of the zener diodes (in the square pads) are not properly soldered on the underside of the board.

[Galluch57]

Thank you - I will work on that tonight 🙏🏼

[Galluch57]

I just wanted to show you this photo which was taken before installation of the board. Is it possible that those solder joints could have degraded in two weeks of use? (I used Kester "44" 63/37 rosin core solder)

[Paul Birkeland]

Yes, those haven't been heated enough and should be reflowed (excluding the LEDs, which take very little heat to solder properly).

[Galluch57]

Paul, should I desolder and solder again or just heat the existing solder?

[Paul Birkeland]

Heat the existing solder, provided it has lead and is rosin core solder.  Adding more solder will just add more metal that needs to be heated to flow out properly.