Products > Test Equipment
Replacing OLED screen on an Agilent U1253A Multimeter
Rollin Hand:
Im interested on the board .Keep me inform.
crohamson:
I came across this topic while searching for information on replacement OLED displays for a different product, internet radios made by Pure. They used a different RiTdisplay display, the P19301, but that suffers the same fading with time.
As supplies of these old displays is almost non-existent, I have sought alternatives and found that most new ones do not display correctly, but show a mirror image. Hence my interest in this blog. But as satanistik has pointed out, the solutions so cleverly applied to the Agilent multimeter will not work for my application, as the Pure radios use an SPI serial interface.
I have noticed that the displays are commonly identified here by the driver IC, e.g. SSD1303 0r SSD1305, and that the mirrored image is due to the different driver in replacement displays. But I believe that the cause of the mirroring is due to the different pixel address mapping in the screen. The Pure radio display uses an SSD1305 driver, and substituting a display with an SSD1309 or SPD0301 both give a mirror image. This is due to the different start address of the Segments (columns) and Commons (rows). Also, the SSD1303 and SSD1305 are both 132x64 pixel drivers, hence most new 128x64 display drivers will show a 4 pixel offset.
Tarloth:
Hi, I think that the only "final" solution it's use a microcontroller to translate the multi meter commands to a new display command set. If the communication it's parallel and the new display it's pin compatible and software compatible, the solution cleverly proposed by forum members it's perfect. If not the only solution to me, it's translate the commands and offset/scale the pixels when it's necessary.
In my case, I doubt to use again an OLED display that's probably not available the next time that screen fade away and perhaps seems useless to store another screen because they ages without use. My screen did fade away without use and even without a battery in the meter.
I'm thinking in change the display technology expanding by the way the battery duration, but I haven't time to do this until almost end of year.
I'm very disappointing with Agilent, If the screen not exist anymore they must develop a new board adapted to a new screen or a new firmware to manage a new screen. I's a shame that a beautiful multi meter ends his life in only few years. BUT, internet is plenty of appliances with the same screen problem, it is not only Agilent.
marcopolo:
I fully agree with you.
joncl:
Thank you very much ultrasmurf for posting your solution! My 1273A was basically useless. Display was so dim, could no longer read anything. Total disappointment for a $350 MM, especially since it's had such light use! I ordered your PCBs from Seeed, and components from Newark. Total cost was around $50 with shipping. Soldered up the board (after a couple of tries getting the soldering technique down), and my 1273A is working again! Nice and bright green display now! Super stoked! As others have noted, the last column seems to be displayed first, which is close enough for me (you can see this in the attached photo). I have a stack of boards left and a few components, so if anyone needs one let me know.
edit: link to ultrasmurf's post: https://www.eevblog.com/forum/testgear/replacing-oled-screen-on-an-agilent-u1253a-multimeter/msg3085696/#msg3085696
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