EEVblog Electronics Community Forum

Electronics => Repair => Topic started by: paw on December 31, 2018, 12:44:36 pm

Title: U1253B OLED replacement problem. Screen inverted.
Post by: paw on December 31, 2018, 12:44:36 pm
Hi all,
I just got to reviving my meter. Ordered couple of "31 pin, 2.4 inch" OLED displays. Bought two in case one was wrong/incompatible or in case I needed a second replacement down the road (surely will). First one just arrived. I just fitted it but the result is somewhat unexpected. May I ask if any of you know exactly what is happening? Is this just a different layout screen? Is there anything to be done? Any of you OLED aficionados out there? Perhaps someone knows a better part?

This arrived:
https://item.taobao.com/item.htm?spm=a1z09.2.0.0.25972e8d9ogAS0&id=564209537380&_u=v201fasvrd7437

This is the second one (not shipped yet):
https://item.taobao.com/item.htm?spm=a1z09.2.0.0.2a3a2e8dABi3Qi&id=571989658564&_u=v201fasvrd27a2

P.S. I emailed local reseller last year when I saw the fade creeping in. I don't know if it is still available but I was quoted 123.61 EUR + VAT + shipping for the original part (U1253-66007).
Title: Re: U1253B OLED replacement problem. Screen inverted.
Post by: wraper on December 31, 2018, 01:21:34 pm
You bought display with a wrong controller IC, should be SSD1303.
Title: Re: U1253B OLED replacement problem. Screen inverted.
Post by: wraper on December 31, 2018, 01:29:03 pm
It's already verified by several people that SSD1305 and SSD1309 will show mirrored image.
Title: Re: U1253B OLED replacement problem. Screen inverted.
Post by: Armadillo on December 31, 2018, 01:37:03 pm
The Story of Little-endian & Big-endian 8888 kinds.
The controller looks pin-wise compatible, just that you don't have the source code to change the configuration to recompile to suit the current one.
Title: Re: U1253B OLED replacement problem. Screen inverted.
Post by: Armadillo on December 31, 2018, 02:10:04 pm
Mirror X direction would have solved it.
No source.!

Title: Re: U1253B OLED replacement problem. Screen inverted.
Post by: cncjerry on January 03, 2019, 05:10:39 am
So, you bought Leonardo's meter?
Title: Re: U1253B OLED replacement problem. Screen inverted.
Post by: paw on January 03, 2019, 07:44:19 am
Had to buy it from someone :) I bought it from TheAmmoniacal few years ago.
The mirrored display is surprisingly readable  :bullshit:

I just wrote an email to the last place (I could find) that claims to have the display in stock (but does not ship internationally). They have 2. I wonder if I should get both in case someone else needs one. The price is not great €50.

Update:
I ordered the module from them (they are now out of stock). It is 2015 new “BL 12864G2 ERNHn“. They come on their own module. Desoldering was tricky (rohs?!).
All went well and my meter is back in business.
Title: Re: U1253B OLED replacement problem. Screen inverted.
Post by: akedrov on January 04, 2020, 12:17:10 pm
My U1273A multimeter screen became unreadable recently. I've ordered BL 12864G2 ERNHn (https://www.soselectronic.com/products/bolymin/bl-12864g2-ernhn-1-300047) from SOS electronic on December 20, 2019. Unfortunately display now have 24-pin connector.
Title: Re: U1253B OLED replacement problem. Screen inverted.
Post by: Samogon on January 04, 2020, 02:48:26 pm
 I counted  20 on your picture.
Title: Re: U1253B OLED replacement problem. Screen inverted.
Post by: wraper on January 04, 2020, 03:15:24 pm
Quote from: Samogon on January 04, 2020, 02:48:26 pm
I counted  20 on your picture.
You counted wrong connector, and apparently don't understand what this thread is about.