Quote:
Originally Posted by knc1
Let me see now, a PW-2 ...
Check the attachments to these posts:
https://www.mobileread.com/forums/sho...99&postcount=6
Different contrast:
https://www.mobileread.com/forums/sho...11&postcount=8
So those make it look like the traces go directly under the shield.
Amazon has been soldering those shields in-place for several models now.
Alright, if they want to be that way - what dissolves cured solder-mask?
Acetone? Maybe.
It does on my stuff, but I use a UV cure sm ink.
I haven't tried to wipe away the Amazon solder mask to expose the top traces.
P.S: The on/off and reset connections on the PW-2 have been tested and found working.
P.P.S: When I wrote **bright** light, I meant it.  |
Indeed, that picture sure makes it look like the traces make a beeline toward the shield with less than a centimeter of space. I'm having a little bit of trouble understanding what to do as far as the reset and on/off connections. Are they to be used in lieu of the serial? I would imagine they can be programmed as inputs, but I'm not exactly sure how to do that. It's a bit above my paygrade without some kind of help or a guide. I couldn't find anything via search. Is there any detailed info anywhere, or any insight you can provide?
I'll definitely make my next attempt at this with a microscope. I tried dissolving the solder mask already but acetone simply cleans it, and no better than some denatured alcohol. I might try some medical/reagent grade stuff (if I can get my hands on it). The only thing I can think of that will dissolve solder masks on commercial PCB's are strong solvents like methlyene chloride. I don't want to do that as it can be difficult to do with pin point accuracy but I could try scratching slowly away at it now that I know exactly where the trace is...perhaps with a pick or a scraper/knife and maybe I can solder directly to the trace. Seems like a viable option, but I'd rather try the on/off reset route first, if I can find enough information to be able to do it.
I know the light is a little weak. I'll try to get some better pictures with a brighter light if I can find one but I can't promise anything
Regards,
Dan