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Post by dshadoff on Mar 20, 2020 15:53:52 GMT
I'm planning to take some measurements and do some logic trace dumps from a PC Engine CoreGrafx I just bought.
I've opened it up, and the board has a coating of lacquer of some sort (not exactly a conformal coating, but it seems they were trying to prevent rust or something).
While I'm planning to access the existing external bus port whenever possible, the chip leads are fairly close together, and I would like to avoid soldering directly to them whenever possible, so I'd like to try to solder test leads to some through-hole via's where possible.
What would you consider to be the most minimally-invasive way to access these ? Would it be acetone ? fiberglass pen ? some combination ?
It looks like the via's are covered - but not filled - with soldermask, so I may need to go through that layer too (may require another solvent/abrasive).
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grahf
Deep Blooper
Posts: 19
Homebrew skills: hobby gamedev
Fave PCE Shooter: Download / Final Soldier
Fave PCE Game Overall: Bomberman '94
Fave PCE RPG: Kaze no Densetsu Xanadu II
Currently Playing: Akumajo Dracula X
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Post by grahf on Mar 29, 2020 11:41:44 GMT
Acetone will do for a small area. If you ever need to take the lacquer off an entire board, you can use a can of non-chlorinated brake cleaner from the auto parts store
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