Author Topic: Agilent U1273A OLED DMM Dim Display  (Read 3753 times)

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Offline GangwayTopic starter

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Agilent U1273A OLED DMM Dim Display
« on: July 07, 2018, 11:27:39 am »
Just asking if anyone had success repairing display board. Keysight only offer purchase of exchange meter.
 

Online wraper

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #1 on: July 07, 2018, 11:30:19 am »
Yes several people did. Search for a thread on the forum.
 
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Offline GangwayTopic starter

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #2 on: July 07, 2018, 11:40:11 pm »
Hmm, nothing found relating to U1273-26501 Display Module repair. But old post confirms Agilent U1273A DMM is considered BER if any out of warranty repairs required.
Never had this problem with repairing Fluke products.
 

Online wraper

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #3 on: July 08, 2018, 12:00:36 am »
Hmm, nothing found relating to U1273-26501 Display Module repair. But old post confirms Agilent U1273A DMM is considered BER if any out of warranty repairs required.
Never had this problem with repairing Fluke products.
You should get a display from third party. Or order U1253-66007 from Keysight and desolder it form PCB it will come with. Although it's somewhat tricky as it's tab soldered.
https://www.eevblog.com/forum/testgear/replacing-oled-screen-on-an-agilent-u1253a-multimeter/msg1362614/#msg1362614
IIRC there was some another thread too. Some people ordered displays from china which were not soldered to PCB therefore didn't need to be desoldered first.
 

Offline GangwayTopic starter

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #4 on: July 08, 2018, 01:47:16 am »
Thanks for reply, trolling Keysight forum, found display for 253 series available, but Keysight Austraiia, told me it would not work in 273A.
As I'm not sure if problem is in OLED or PCB circuit. Time spent dictates close this job off.
 

Online wraper

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #5 on: July 08, 2018, 07:51:48 am »
Thanks for reply, trolling Keysight forum, found display for 253 series available, but Keysight Austraiia, told me it would not work in 273A.
As I'm not sure if problem is in OLED or PCB circuit. Time spent dictates close this job off.
It won't fit to 1273A unless you desolder it from PCB it comes with.
Bare display without PCB https://item.taobao.com/item.htm?spm=a230r.1.14.18.4707da385slyfU&id=556241996733&ns=1&abbucket=19#detail
« Last Edit: July 08, 2018, 08:00:17 am by wraper »
 

Offline GangwayTopic starter

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #6 on: July 08, 2018, 10:37:16 am »
Thanks again for reply, interesting you can purchase the OLED panel, ( if I can read Chinese), but PCB maybe faulty.
Either way this exercise is not going to be cost effective.
Will give owner bad news tomorrow.
Appreciate your time.
 

Online wraper

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #7 on: July 08, 2018, 10:53:17 am »
Thanks again for reply, interesting you can purchase the OLED panel, ( if I can read Chinese), but PCB maybe faulty.
What?  :-//
Quote
Either way this exercise is not going to be cost effective.
Will give owner bad news tomorrow.
Appreciate your time.
How it's not cost effective? Display costs < 10% of the new meter price. Unless you will charge more than US $180 for your work, it's still makes sense.
 

Offline bson

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #8 on: February 20, 2024, 12:09:11 am »
Just replaced it on my 1273A, the old one came off easily with hot air and gently lifting it off the PCB pads.  A little heat on the display itself and it came off the backing easily enough.  Kept the old foam backing, with a few dots of CA glue (probably good enough).  Might have worked to use double-sided 3M tape as well... The hard part was soldering the new connector to the PCB; I cleaned up the pads and applied solder paste, but couldn't really reflow the connector as it was a $*$&^* to get to lie flat.  I held it sorta in place with a small clamp, then pushed down on it with a small screw driver and gave it a quick tap with the solder iron (JBC CD-1SQF with a fine tip) and the paste flowed perfectly.  One pad/tongue at a time: push it down, tap with the tip, remove tip, hold for a second or two, move on to the next.  I did it under the AmScope.  Reassembled, works fine, except it's right to left, shifted (as expected).  Time for the firmware fix; haven't actually looked at that yet, but I assume the unused white connector to the top right of the main PCB (rear view) has rx/tx pins.

Clearly these displays are defective... Amber OLEDs have very long life, blues are shorter but not THIS short by any imagination.  I use mine very little, and the display didn't even outlive the batteries that came with it.  (Which were probably due to be discarded anyway, not a fan of leakage.)  From what I can tell the most common OLED defect is they're not properly sealed, air gets in and oxidizes the <whatever is inside>.

Edit: here's the exact item I got: https://www.aliexpress.us/item/2251832698680234.html

(Apologies for resurrecting this old thread.)
« Last Edit: February 20, 2024, 12:27:12 am by bson »
 

Offline DavidAlfa

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #9 on: February 20, 2024, 05:02:47 am »
You need nothing special, use the modded firmware updaters with the original cable.
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Offline bson

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #10 on: February 24, 2024, 04:30:37 am »
Yes, the modded 3.03 works beautifully! Thanks so much for creating it! :-/O

(The file says 3.01, but the meter reports 3.03.)
 

Offline DavidAlfa

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Re: Agilent U1273A OLED DMM Dim Display
« Reply #11 on: February 24, 2024, 10:21:09 am »
Yes, because as stated:

Must be v3.01, newer version will check the current firmware and block the update if already in the latest version!
   Just change the firmware name to U1273A(X)_V301.AG. (A or AX).
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