Products > Test Equipment
Replacing OLED screen on an Agilent U1253A Multimeter
--Oz--:
--- Quote from: vishaldotgupta on September 14, 2022, 07:53:45 am ---please confirm the resolution of the oled.
oled presently available has slightly less horizontal resolution resulting in loss of two columns on either side.
in the DMM pic it seems the resolution parts is okay
--- End quote ---
With all the reading I have done on this subject months ago, seems the original display was not the standard 128 columns wide and was 132 wide.
Seems this display is OK in not having the right most column display on the far left column.
I will look for a meter with original still working display and compare, when I find one, I will report back.
wraper:
--- Quote from: --Oz-- on September 16, 2022, 05:59:40 am ---
--- Quote from: vishaldotgupta on September 14, 2022, 07:53:45 am ---please confirm the resolution of the oled.
oled presently available has slightly less horizontal resolution resulting in loss of two columns on either side.
in the DMM pic it seems the resolution parts is okay
--- End quote ---
With all the reading I have done on this subject months ago, seems the original display was not the standard 128 columns wide and was 132 wide.
Seems this display is OK in not having the right most column display on the far left column.
I will look for a meter with original still working display and compare, when I find one, I will report back.
--- End quote ---
It's a standard display and with same resolution. 132 columns are supported by SSD1303 controller, not actual display. IIRC you get a few columns wrapped around and bottom row shifted. Proper solutions were given in this thread which do not cause these artifacts.
gamalot:
Thanks for all the very useful information, I have seen solutions for combinational logic, EPROM, FPGA and CPLD.
I'm trying to solve the problem with an STM32 MCU and everything seems to be working fine so far.
moeyekung:
Hello.This can do on ssd1309?
Thank you.
--- Quote from: kkontak on June 14, 2021, 11:27:29 pm ---I friend had problems with an Agilent U153A and asked me to find a way to fix it.
(Sorry Jonh for the delay...)
The original yellow OLED display was very very dim.
I followed the idea from Alexej Krom (with a twist) and worked well enough. Thanks Alexej.
http://www.alexej-krom.de/replacing-the-oled-ssd1303-display-with-ssd1305/
I found a pin compatible green display with SSD1305 controller, from ebay.
https://www.ebay.com/itm/Green-2-4-inch-128x64-OLED-Display-Module-I2C-Serial-SPI-SSD1305-w-Tutorial-/291844721833?hash=item43f34d0ca9&tfrom=301226745140&tpos=unknow&ttype=price&talgo=origal
The unsoldering and soldering the new one was almost easy... Nothing broke. I had more trouble positioning the display to match the front window.
I tried first an old UV EPROM that I had in hand but it was too slow and could not follow up the MCU control signals.
I used a different FLASH memory at 5V, SST39SF020A-70-4C-NHE PLCC-32, from ebay.
https://www.ebay.com/itm/123259658853
It was not a big surprise, it arrived with some BIOS firmware as a bonus!
I programmed it with a mini programmer from ebay called TL866CS and the optional PLCC32 adapter.
Worked great.
I used the 5V level signals side to make the soldering easier. Thats the reason I used the 5V FLASH.
The FLASH datasheet says it has 10mA consumption. Will see how much faster it drains the battery.
The mirror image was fixed and only some artifacts in the lower side of the display are shown when the fast moving bar graph is displayed and only in some screens. The readings and the other graphics are not affected.
I don't see any vertical line offset like others are mentioning.
OLED and Memory total, about $20.00.
Here are some pics and the schematics.
--- End quote ---
gamalot:
Try different splash screens and have so much fun. >:D
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