Products > Test Equipment
Fluke 8060A replacement LCD Display with PCB and LEDs
paraboliclabs:
Small update with everything routed and test fitted. The elastomeric footprint on the paper looks a bit off, but it's the camera's perspective messing with the view. The traces all line up very well. :-+ It's exciting that no soldering will be required and the original plastic LCD cover can be used. It's basically a drop in replacement! Provided it works as expected. Probably will send this out to PCBWay in a few days. Going to mess around with BOM and assembly setup first. I decided against rounding and tear-dropping tracks, for now.
Dang, my lunch breaks are going to be boring now that this is almost done. Oh I'll update the github with this version also. Have a good day!
blue_lateral:
For what it's worth, there are at least 2 different versions of the stock LCD brackets and the stackup of display, lens etc. that goes in them. There might be three.
Of the two I am semi-familiar with, one version has a separate polarizer and one doesn't. That makes the thickness of the stack slightly different, and it is unclear to me whether the parts can be mixed and/or to what extent. If you look at your picture below, you will see two beige alignment keys down at the bottom by the contacts. Those are slightly different on the other version of the bracket. At a minimum it prevents you putting the polarizer where it doesn't belong.
It follows then that the space the stack of lcd, lens, etc. rides in is also a different thickness and one might need to change update the bracket if you update the LCD? Or maybe leaving the polarizer out is enough, but somehow I don't see how that could be. I also wonder whether this affects necessary thickness of the zebra strip. There were 2 kinds of zebra strip, but I don't know if the change corresponds in time to the LCD/polarizer/bracket change. The early one kind of looks a pink tootsie roll and the later one has more or less a normal zebra strip look.
Additionally, near the end of the run the LCD changed again and the digits got bigger. That may imply a third setup? I have one unit that probably? has the big digits, but I've not taken it apart.
I had planned to document all this for the "Old Fluke Multimeters" thread, as I have some 8060As that are kind of stuck mid-rebuild right now. Life got in the way. I'll get to it eventually.....
paraboliclabs:
--- Quote from: blue_lateral on September 27, 2024, 10:28:38 am ---For what it's worth, there are at least 2 different versions of the stock LCD brackets and the stackup of display, lens etc. that goes in them. There might be three.
Of the two I am semi-familiar with, one version has a separate polarizer and one doesn't. That makes the thickness of the stack slightly different, and it is unclear to me whether the parts can be mixed and/or to what extent. If you look at your picture below, you will see two beige alignment keys down at the bottom by the contacts. Those are slightly different on the other version of the bracket. At a minimum it prevents you putting the polarizer where it doesn't belong.
It follows then that the space the stack of lcd, lens, etc. rides in is also a different thickness and one might need to change update the bracket if you update the LCD? Or maybe leaving the polarizer out is enough, but somehow I don't see how that could be. I also wonder whether this affects necessary thickness of the zebra strip. There were 2 kinds of zebra strip, but I don't know if the change corresponds in time to the LCD/polarizer/bracket change. The early one kind of looks a pink tootsie roll and the later one has more or less a normal zebra strip look.
Additionally, near the end of the run the LCD changed again and the digits got bigger. That may imply a third setup? I have one unit that probably? has the big digits, but I've not taken it apart.
I had planned to document all this for the "Old Fluke Multimeters" thread, as I have some 8060As that are kind of stuck mid-rebuild right now. Life got in the way. I'll get to it eventually.....
--- End quote ---
That's really good and interesting information! I appreciate that. I have two 8060As and the one I've been designing everything on, indeed has the "pink tootsie roll" zebra strip. The pink tootsie roll version has a display sandwich thickness of 4.05mm - 4.10mm, it's alignment keys are 6.10mm wide and 9.90mm wide.
I just opened up the one I've never had problems with and it has a more normal rectangular zebra strip and has the same size LCD alignment keys/clips that are both 6.10mm wide. It's display sandwich thickness is between 4.08mm - 4.40mm, (measured from edge without polarizer, and measured in the middle of the LCD with polarizer). I put the PCB, paper printed, and plastic cover in and it fits with the elastomeric pads matching up. I also slid the older unmeasured LED PCB with plastic cover and it fits as well. If the elastomeric connection layout is the same, which I imagine they are, then the newest PCB should work on at least these two variants. So that's great news! I'll have to look at the LCD on the other one and verify the elastomeric connection layout is the same. I would assume they are.
Curiously I never noticed the backs are different too. The pink tootsie roll one, has embossed (raised) lettering and the regular zebra strip one has debossed (lowered) lettering. That one, the non-pink-tootsie-roll also has "Listed 950 Z" and "UL" circle at the bottom.
I have seen other 8060As that's missing the "Everett, Washington" text with a CE emboss next to the UL circle, I wonder if this is the third variant that you previously described. If it is, I can try and get one.
Thanks again.
paraboliclabs:
Small update, I edited the LED footprints to make them easier to hand solder. Rerouted some traces to account for larger LED pads. Shifted the elastomeric footprint to align better. Fixed the KiCAD project. Added Thanks and Fluke silkscreens. Submitted new order to PCBWay. :-+
I couldn't ensure the LEDs used by PCBWay were the right ones, so I will forgo assembly at this time. The github has been updated with all changes and fixes applied.
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