Electronics > Repair
Hioki 3532-50 LCR Repair (One major problem solved, SM still wanted)
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Martin72:
Judging by the stripes, you haven't adjusted its own contrast yet, have you?
KungFuJosh:

--- Quote from: Martin72 on August 15, 2024, 11:02:25 pm ---Judging by the stripes, you haven't adjusted its own contrast yet, have you?

--- End quote ---

I'm talking to the seller now to deal with that. I've tried adjusting both contrasts, but it's hard to get a perfect balance. I think the cable connection is poor.

Interestingly enough, they also include an extra IC chip, which he told me to solder in to try and help with it. I soldered it in, and the dots look better at least.
KungFuJosh:
The seller has been trying to rectify this, but of course I just got a message limit error from aliexpress. 🙄🙄 Try again in 24 hours. 💩 That blocked sending attachments, not the actual chat. Still annoying tho.

He had me remove the contrast knob on the back of the LCD, and then the chip he previously had me add. He said the IC chip was for negative pressure voltage related to contrast.
KungFuJosh:
I was fairly convinced the soldered-in cable was part of the issue, so I removed it. Then I removed the cable connector from the old LCD, and installed it on the new LCD.



What was on the display improved a little, unfortunately though, I had to use the old cable which was also damaged. I ordered some new cables from Amazon, and I'm hoping that does the trick.



I also suspect that the contrast pot on the LCR should maybe be replaced. I might do that also. ETA: Nope. I pulled the pot and tested it, and it works fine. It felt a little loose before, maybe reinstalling it helped. I'll find out in a couple days when I get the new ribbon cables from amazon.

In any case, the seller has been helpful and quick to respond the whole time. This is the LCD I bought: https://www.aliexpress.us/item/3256802097838920.html

Thanks,
Josh
KungFuJosh:
The touch panel I ordered arrived today. Totally useless, does nothing at all. Oh well. On to the next one.
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