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Replacing OLED screen on an Agilent U1253A Multimeter

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Dacke:
I have a U1273A and the original display is still fine,  but I wanted to get a replacement display for when this one fails.  Yesterday I stumbled into someone who has made a kit available for these meters on Ebay for $48,  first time I have ever seen them on the site.  I figured I would share with you guys as I know these displays can sometimes be hard to get your hands on.  Looks like he still has a few left -   https://www.ebay.com/itm/224562652338

wraper:

--- Quote from: Dacke on September 23, 2021, 02:47:17 am ---I have a U1273A and the original display is still fine,  but I wanted to get a replacement display for when this one fails.  Yesterday I stumbled into someone who has made a kit available for these meters on Ebay for $48,  first time I have ever seen them on the site.  I figured I would share with you guys as I know these displays can sometimes be hard to get your hands on.  Looks like he still has a few left -   https://www.ebay.com/itm/224562652338

--- End quote ---
Well it's just someone selling design from satanistik/ultrasmurf. Since there was no R&D or assembly whatsoever, IMHO it does not justify inflating provided component cost like 5 3 times. 
EDIT there are plenty of those displays on aliexpress like this

gnavigator1007:
Have the bad display issues been limited to the Agilent models? I've had the keysight u1273a for a few years now and it's still going strong. I was aware of the issues before I purchased it and have been following the various threads just in case, but I don't recall seeing any posts for the keysight branded meter.

rsjsouza:
I have an Agilent U1273A that still looks as new, thus I suspect this new series was not affected as badly by this issue.

Kimmeridgien:
Hi all and thanks to everybody who have contributed to this work.

I am kindly asking for feedback on my adapter board for the SSD1305-based display.

I read the below excellent project description and decided to add a MUX to the simple logic gate design:
https://kitsune-denshi.net/projects:display-if

Assuming that Kitsune Denshi is right about the reason for the artifacts, it is easy to properly handle the case of reading from the SSD130x controller. He / she does that by not actually reading from the SSD130x but instead just returning 0x00 to the U1253x (which seems to work OK). The simple logic gate design doesn't read bit D0 from the SSD130x controller but actually tries to drive this pin at the same time that the SSD130x controller is driving it. This might be bad in the long run.

My humble addition is to add a MUX that couples the SSD130x D0 pin to the U1253x D0 pin when WR# is high, and couples the D0' from the simple logic gate design to the SSD130x D0 pin when WR# is low.

Before ordering the PCBs I would appreciate proof reading, if anybody feels up to it. I'm attaching some screen dumps and photos. My solution requires cutting one PCB trace and soldering one wire.

Thank you in advance and best regards

Niclas

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