CPB green repair needed

David1515 · 4 Sep 2021 at 18:21

Hi. I'm very new at this and I'm trying to repair something. Can you tell me if and how I repair this green as I think it is effecting the trace. Thank you.

Cyber-Mav · 4 Sep 2021 at 18:22

Pic not showing

t31os · 4 Sep 2021 at 18:37

The URL is still there in the page, the forum just seems to have an issue with it.

https://gifyu.com/image/JLkM

No idea on this question, just wanted to post the URL so others can help.

David1515 · 4 Sep 2021 at 18:53

Thank you

drakulton · 4 Sep 2021 at 19:04

David1515 said:
Hi. I'm very new at this and I'm trying to repair something. Can you tell me if and how I repair this green as I think it is effecting the trace. Thank you.

The 'green' is just a conformal coating. You can use nail polish to repair the damage to it. The trace running closest to where the green is missing doesn't appear to be making contact with the solder at its upper end.

David1515 · 4 Sep 2021 at 20:05

Thank you

David1515 · 6 Sep 2021 at 08:23

Also what have I destroyed here and can I fix it?

<a href="https://ibb.co/r0qKK30"><img src="https://i.ibb.co/9gBmmhg/20210905-105842.jpg" alt="20210905-105842" border="0"></a>

Jonnygrunge · 8 Sep 2021 at 00:38

The green like others have said is just a solder resist kind of varnish, Google, RELIFE RL-UVH 901G UV Curable Solder Mask Green only a few quid. The copper pad you have soldered is fine as it is a ground plain.
That soldering does not look too great, snotters on a dry stone dyke my lecturer would say! If you can I would get some solder wick and remove some of the excess, invest in some solder Flux and make sure your iron is set to around 375oC.
Soldering like that is due to bad wetting like welding where there has not been proper heat transfer, to all parts. IPA or rubbing alcohol is great for cleaning PCBs.

David1515 · 8 Sep 2021 at 05:09

Jonnygrunge said:
The green like others have said is just a solder resist kind of varnish, Google, RELIFE RL-UVH 901G UV Curable Solder Mask Green only a few quid. The copper pad you have soldered is fine as it is a ground plain.
That soldering does not look too great, snotters on a dry stone dyke my lecturer would say! If you can I would get some solder wick and remove some of the excess, invest in some solder Flux and make sure your iron is set to around 375oC.
Soldering like that is due to bad wetting like welding where there has not been proper heat transfer, to all parts. IPA or rubbing alcohol is great for cleaning PCBs.

Thanks, this is really helpful