Electronics > Repair
Hioki 3532-50 LCR Repair (One major problem solved, SM still wanted)
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Martin72:
Fu...
However, even at the risk of you hitting me:
I almost went insane back then, as it now belongs around, the first time I plugged it in wrong, so that the contacts went empty (not occupied).

KungFuJosh:
Don't worry, I had the same thought.  :-DD :-DD

The longer cable goes to the farther connector. But I plugged both cables in to both connectors, and even tried both ways again after flipping the new touch panel around so both cable connections were tried with both sides of the panel. It's junk.

Then I plugged the original stock panel in, and it still partially works.

The funny thing is, that the original panel works in one area, while the panel you tried to replace it with worked in a different area. The new one didn't work at all.
Martin72:
What annoyed me was that there was no data sheet for the touch panel.
This is a resistor matrix, no “hard” commands are sent to the board through it, but voltage dividers are generated.
At least that's what I think with a resistive touch panel.
What I want to get at is that you can measure the panel to make sure that the error is not somewhere on the board (which I don't believe).
But you need to know how the pins are assigned.
Therefore.... data sheet.
KungFuJosh:
There are 6 X and 6 Y traces, and there's some other weird stuff going on, like one line that circles the whole pad and maybe connects X and Y at some point. The common feature that I've seen so far is that they all suck. 😉

Finding a decent LCD screen was too easy, so I think the touch panel will remain a pain in the 🫏.
KungFuJosh:
I just noticed something. If you compare the original to the common replacement versions, the replacements have an extra trace.
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