Products > Test Equipment
Replacing OLED screen on an Agilent U1253A Multimeter
iblackford:
Hi all,
I've followed this thread quite a bit, and all the various solutions for replacement displays. I can't say i've read _every_ message, but I've ready many of them. Forgive me if my questions have already been answered.
I have a U1253A with a dead display. I ordered an SSD1309 display, and I had this PCB made:
I put it all together today, ohming out the various connections as I go. To my dismay, it doesn't work. :(
I noticed a couple of things:
1) The adapter board I had made, I just realized that it's for the U1253B...would this also work on the U1253A?
2) I may have gotten the knob on the case out of sync with the PCB assembly. I can manually move the PCB switch with an allen key, and I think I can see how it should be aligned. Can anyone comment? from the picture below, does the notch in the PCB switch show that it's in the off position?
Thanks, Ivan
PushUp:
I also haven't read anything, just saw a video some days ago and did some links for the necessary parts, in case my Keysight U1273A needs an OLED replacement...
As far as this description is concerned - you may have to translate it - both A and B versions need the same OLED modul LC-OL12864-09-YO-AG.
https://lcdstore.de/epages/17406888.sf/de_DE/?ObjectPath=/Shops/17406888/Products/LC-OL12864-09-YO-AG
This one, however, for the "Agilent U1253 A und B" is tutto completto and can be changed without soldering for around 72 Euro + shipping. I would buy it, as I live in Germany, but Canada is probably too complicated...
This guy, which is probably also an EEVBlog-Member, bought from the same source and changed his OLED for his Keysight U1273A; it is another board, but maybe you get a hint from his video, despite the foreign language:
ht*****tps://www.youtube.com/watch?v=ReUDgjQ5TA0
...but I don't wanna spoil your fun of doing it yourself, just wanna show you an alternative as testgear should be in perfect and reliable condition as soon as possible! :popcorn:
Cheers! ;)
brainhouston:
Hope this helps someone
Wanted to post my successful replacement for Apexi Power FC OLED commander
I decided to go with SST39 flash memory design from @decoder77 (thanks buddy)
More info - http://www.alexej-krom.de/replacing-the-oled-ssd1303-display-with-ssd1305/
One difference for Apexi is it already sends A1 command, so had to change it to A0 (i'm guessing due to screen orientation)
This is why all the conversion boards made for Agilent/coffee machines/audio players don't work for Apexi.
With flash memory its easy, just reprogram different bit.
Also, its much easier to cut the trace for D0 and solder the new output right to the display interface (see red circle in the pic), rather than to de-solder all 20pins between 2 boards as some others have done.
FYI, its been said few times already, OLED displays with SSD1305 controllers are still for sale on many Chinese websites (got one from AliExpress), these only have mirror issue. Displays with SSD1309 will also have offset which is harder to fix due to 2 step memory addressing and needs FPGA or CPLD circuit...
@Boosted_Eric, hope you already figured out your issue or maybe this will clarify it for you.
Big thank you to all the fine folks who figured this out and SHARED their designs:
@satanistik, @ultrasmurf, @gmarsh and probably more...
And big shame to ones like @johns who come here for help and use all the shared knowledge but don't share when they find the solution...
Instead just offer the service to fix it and keep it to themselves like its some big secret.
Trust me the ppl that have the skills for this can figure this out anyways and will do it themselves, you won't loose any business over this.
/rant
johns:
brainhouston, you are very wrong. We haven't use any info from this forum.
What we used is the logic analyzer to solve the problem, same as satanic did. This is what he told me, use the logic analyzer and you will fix it.
It takes good few hours to fix one Apexi commander and it is not worth the money people are prepared to pay for it.
johns:
I know how to check the color of the OLED display.
On the backside read second line and first letter will tell you a color:
Y - yellow
R - RED
B - Blue
W - White
and so on
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version