Electronics > Repair

Hioki 3532-50 LCR Repair (One major problem solved, SM still wanted)

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Martin72:

--- Quote ---It isn't offered as a replacement. The seller suggested this LCD as a replacement based off the dimensions and the generic model number of the stock panel. It's not advertised as being specifically used with the Hioki.
--- End quote ---

 ;)

What was it advertised as, how did you find out about it?
Plus:
Powertip did not explicitly advertise the PG320240 as a display for the Hioki only.
Hioki only used it for its own purposes without changing anything.

KungFuJosh:

--- Quote from: Martin72 on August 28, 2024, 10:12:06 pm ---What was it advertised as, how did you find out about it?
Plus:
Powertip did not explicitly advertise the PG320240 as a display for the Hioki only.
Hioki only used it for its own purposes without changing anything.

--- End quote ---

I googled the part numbers, and similar stuff came up. Then I messaged the seller to see whether the LCD I found was compatible or not. It wasn't, so he suggested this one instead.

I couldn't tell you for sure why any of it is the way it is. Do we know for sure that Hioki didn't have Powertip customize any parts of the panels?

ETA: I should add, I think the sellers level of understanding when suggesting the replacement was based on the physical measurements more than anything else. 😉

Martin72:

--- Quote ---Do we know for sure that Hioki didn't have Powertip customize any parts of the panels?
--- End quote ---

I would almost blindly say that this is not the case, because what is the current problem?
The contrast, or....
And that is a matter for the display.

KungFuJosh:
It's not just contrast. It's:

--- Quote from: coromonadalix on August 26, 2024, 10:48:34 pm ---all theses resistors things must play with duty cycle, timings  etc ...   it's a matter of finding the row and column drivers data sheet if they exists and try to figure out   ...

--- End quote ---

Anyway, it's in a pretty good place now. Easy to read and stable.

Martin72:

--- Quote ---It's not just contrast. It's:
--- End quote ---

If we had a circuit diagram, we would really know.
That is one point.
The other is that, in contrast to today's displays, they were still rather “raw” over 20 years ago.
The graphics/character generation was on board, in this case 4 bits were “pushed over” to the display in parallel.

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