Posted By
Flaviosr
on 2021-03-01
15:02:27
|  Re: Plus/4 issues trying to solve with Diag264
I checked and I do not see solder bridges or other issus... but I still have s trange behaviour of U17.
I try to describe the issue... let's imagine that the chip is what follows:
1 2 3 4 5 6 7 8
|------------------|
| <
|------------------|
9 0 A B C D E F
Pins 1, 3, 4, 5, 6, 9, 0, A, B, C, E, F are connected between every chip so, for example, all pins 1 give continuity between them (and only between them!)...
On the contrary pins D are not connected...
The only issue I see with U17 is that ALL pins 2 are connected APART pin 2 of U17... perhaps there is a cut line... I could put a wire but I do not where to put it... am I right? If so, from to where?
I have the idea to simply connect pin 2 of U16 with pin 2 of U17 but I am afraid of killing the Plus/4...
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