No.105 - Agilent 1253B Multimeter Repair
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- เผยแพร่เมื่อ 9 ก.ย. 2024
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This 1253B suffers from a dead display, a common fault of these OLED. Let's fix it.
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UPDATE: The original Agilent display uses a SSD1303 driver IC.
The replacements are SSD1305 or SSD1309 and will mirror the display.
So, either I find an SSD1303 OLED (long obsolete), or make an adaptor Pcb.
I would just stick with the working replacement display board and declare victory..
You could always build a little board to strap on the front of the meter. Put a camera on it, then flip the image in an FPGA and add a new display in front of that. Job done.
@@sdgelectronics Great idea! and I'll strap the 6v battery from your moped on the back to power it all.
Could it flipped over some how by extending and twisting the flat flex? So the mirror image is mirrored back the correct way.
@@sdgelectronics This is probably the best course of action to be honest.
Thanks for posting the failed repair video, sometimes they are way more useful than the successful ones.
Interesting repair - have also seen EEVBlog's similar repair too. Years ago there were some very nice mp3 players made by Creative Zen and they used OLED colour screens, and after a few years the screens faded and became invisible. I still have a couple of them.
I was just fixing my Samsung S8+ OLED and there was a TFT version of the display, ie, it looks like OLED isn't a great idea for longevity. I had to get a 2nd hand orig OLED with spots, just to get close to the price of an already working 2nd hand phone - ouch -.
I don't know how many years old these U1253B's are by now but there must a manufacturing defect that causes these screens to die so quickly.
My phone is a 12 year old Motorola XT910. It uses a super AMOLED display and still works perfectly. No dead pixels or brightness fading. I have the brightness turned down to increase battery live and reduce eye strain. I wonder if the OLED screens in these multimeters are being over driven. LEDs don't like being over driven. I wonder if there is a way to under run them by changing a resistor or adding a diode in series with the supply voltage?
I purchased one of these and replaced the OLED with what appears to be the same kit that you purchased. The display works very well now, BUT the input attenuator for the voltage ranges is not correct. The maximum voltage you can apply is about 1 volt in all ranges. Except for the millivolt function, which works correctly. Spent some time trying to troubleshoot the problem last summer, need to get back on it when I have time. Would have been nice to have a schematic available, but that does not appear to be available to the general public.
That's an odd fault, hope you get it fixed.
There shouldn't be any interference with the functionality of the multimeter. Data is received but nothing is transmitted back. In a sense the meter is only impacted by the load being present. I've had issues with the firmware on the meters. Back when mine was new it would glitch up and require a hard reset by removing the batteries, turning the dial on and off, and then putting the batteries back in. You can try that and see if it helps.
Why use an OLED screen for a multimeter anyway. What advantage(s) is/are there over a LCD with a backlight. It's just displaying digits after all, not graphics. These multimeters have a _very_ fast update rate. Was an OLED screen needed for that or could an LCD have been used. Apart from that, i don't see any advantage. Seems to be just a gimmic.
What a twist!
I see you have a Lion battery in this now. Have you got the Battery Brand specs?
How long before someone suggests putting it in rice?
I suggest Curry 🙂
It worked for RichRebuilds' Audi :D
As I'm reading your comment, about 17 hours.
Put it in the bin 😆
What gets me is that people buy these expensive things but seemingly cannot repair their own stuff.
Sadly I have one of these. I don't use it very much because every time I reach for it the battery is invariably flat so I have to go through a charge cycle before use. That must be the reason my screen hasn't died yet. I bought mine because it has a very nice display which turns out to be its Achilles heel. I guess as the saying goes beauty is only skin deep,
One of my next jobs is to convert it to Lithium-Ion PP3, thus use of 600-780mAh batteries.
@@IanScottJohnston I think wireless charging is a cool idea.
Very bad multimeters. These companies should replace these for the customers. This is horrible a nice meter like this with so many problems..
Grato!
Show de bola!
Muito obrigado
@@IanScottJohnston
Eu que agradeço!
Forte abraço!
hi. I got the Agilent U1273AX, got a really deal on it from the distributor in my country some years ago. Less then a third of current retail price. Thought, hey, its expensive, but I'll have a MM that will last me for years. Little did I know.
Hadnt used it for a coupel of months, pulled it for something I needed to measure away from my home lab, and the bloody screen had died. Really annoying as it is in mint condition and barely used. I know the screen that is used in the one you repaired is the same as mine, so I would really appreciate if you could provide a link? found a few on eBay, but honestly, gotten burned so many times on eBay that I really dont want to use ebay unless I have too.
So if I can get it repaired, I'll sell it, cant an expensive MM with dying OLED displays needing to be changed every couple of years. And also I asked the distributor is Agilent woudl be able to sell me a new screen. Agilent wouldn't sell me one, but offered me to repair it for 500 euro's lol.
some years ago
500 euros, thats absolutely ridiculous. Thats more than a new multimeter, way more.
RS selling this DMM currently for £968. Wonder how long ago the last one went!
Would never buy a thing with OLEDs.
Could I send my Agilent to you to replace the display for me?
Sorry, I don't really do paid repairs.
Ian, you must be an influencer. Every time you do a repair video, the eBay spare or repairs on the item, go through the roof....🤣🤣🤣
It's hurting all of us test equip. repair folks......wish I could go back 10yrs and buy a load up!
Interesting... you just need to view it in a mirror. Problem solved. Cheaper than a new display and could be useful in tight spaces :D
Ecin oediV naI 🙂
sreehc
Just need to buy a mirror!
@@IanScottJohnston ruoy emoclew 🙂
@@Richardincancale Just reverse the battery polarity :D
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! kaeuqS
Use it fast before the lights go out again
Yes, I wonder how long they actually last! Another OLED I have is on 24/7 and it lasted a year, but these I figure aren't as good.
@@IanScottJohnston I'm sure your not going to be using that meter 24/7 since you have a ton of others. But sure is a pretty meter to have Ian I always liked Agilent stuff.
!sreehc........oediv taerg rehtonA
ahah, lol