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Replacing OLED screen on an Agilent U1253A Multimeter

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gmarsh:
Thanks for the hints and figuring this all out. Everything you've described there seems pretty CPLD-able.

Negative edge of /WR seemed to be the only good way to clock the thing, yeah. Thankfully the meter is nice enough to make the data lines and DC signal valid for both the falling and rising edges of /WR, and the SSD1309 clocks incoming data on the rising edge of /WR. Between that and them writing the column address LSB-first, you'd think the folks at Agilent were planning for this hack.

Thanks for sharing your design too. Wow, that Lattice part is a beast... lots of block RAM and DSP blocks, PLL block, excellent quiescent current consumption, and $5 CAD in singles from Digikey. Gonna have to keep that one in my back pocket.

norb:
Regarding different display controllers, i found this german document on lcdstore.de with details about differences between 1303, 1305 and 1309.

If anybody is interested, i could translate it into english.

fbpicsous:

--- Quote from: norb on February 06, 2021, 09:26:35 pm ---I ordered the display via a tabao sales agent and received the diplay about 10 days later.
Costs / Euro:
Display 59,-
Taobao agent: 15,-
Shipping: 24,-
It is obsolete, but there is a replacement, for which you need an additional pcb:
https://lcdstore.de/epages/17406888.sf/de_DE/?ObjectPath=/Shops/17406888/Products/CFAL12864J-Y
https://lcdstore.de/epages/17406888.sf/de_DE/?ObjectPath=/Shops/17406888/Products/Command-Switch-2

--- End quote ---
LCDstore.de sells an agilent U1253 replacement... but only in Germany  |O
https://lcdstore.de/epages/17406888.sf/de_DE/?ObjectPath=/Shops/17406888/Products/LC-OL12864-09-YO-AG

Keysight quote was ~100-150€ without taxes (2019), but now, they doesn't sell spare part (not available for direct sale)  :-//
https://www.keysight.com/my/partDetail/U1253-66007

Thanks for sharing your taobao experience.

norb:

--- Quote ---LCDstore.de sells an agilent U1253 replacement... but only in Germany  |O
https://lcdstore.de/epages/17406888.sf/de_DE/?ObjectPath=/Shops/17406888/Products/LC-OL12864-09-YO-AG

Keysight quote was ~100-150€ without taxes (2019), but now, they doesn't sell spare part (not available for direct sale)  :-//
https://www.keysight.com/my/partDetail/U1253-66007

Thanks for sharing your taobao experience.

--- End quote ---

If anybody wants to buy this display from Germany, i would offer my help.
Just throw a can of beer over the fence .. :-)

gmarsh:
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