LCD screen identification - Page 1
Forum section: electronics / repair

author: positrontime
author_rank: Newbie
timestamp: September 30, 2020, 04:08:27 am
content: Trying to fix a lcd screen that goes to a air pump. I pulled the board out and de-soldered the broken lcd screen.I searched a bit on digikey but couldnt find anything that matched.

author: rvalente
author_rank: Frequent Contributor
timestamp: September 30, 2020, 11:21:17 am
content: Hum, I'd say its custom.When the display is on, does it has specific symbols for this device? Is yes, its custom any probably will not be easy to find as spare

author: george.b
author_rank: Frequent Contributor
timestamp: September 30, 2020, 01:18:31 pm
content: Quote from: rvalente on September 30, 2020, 11:21:17 amAgreed. Most likely to be custom.

author: coromonadalix
author_rank: Super Contributor
timestamp: September 30, 2020, 02:17:00 pm
content: did google fuuu nothing relevant, i'll say too its custom

author: positrontime
author_rank: Newbie
timestamp: September 30, 2020, 11:37:58 pm
content: Dang, might have to replace the entire controller and lcd with an Arduino or something then.Thanks for the help

author: rvalente
author_rank: Frequent Contributor
timestamp: October 01, 2020, 12:40:15 am
content: Quote from: positrontime on September 30, 2020, 11:37:58 pmAre u sure its dead? Usually these kind of cog displays uses pcf ics or variants, check for i2c bus.NEVER MIND, THERE IS A BIG CRACK THAT I'VE MISSED HAAHHA, STUPID ME!

author: coromonadalix
author_rank: Super Contributor
timestamp: October 01, 2020, 12:42:29 am
content: Is stermay are pump controllers ?? can you find another display pcbis there any contoller chip on the back of the pcb

author: james_s
author_rank: Super Contributor
timestamp: October 01, 2020, 05:06:59 am
content: Did it display graphics or was it just a collection of static symbols? It might be trivial to adapt the signals going to the original display and use that to control a modern graphical TFT or OLED.

author: positrontime
author_rank: Newbie
timestamp: October 02, 2020, 02:16:34 am
content: This is the pump:https://www.amazon.com/OutdoorMaster-20PSI-High-Pressure-Shark/dp/B07QXSM5RGStermay makes the internals, they make all kinds of little electric pumps.OutdoorMaster just puts it in their form factor and colors I would guess.I never saw it running. I bought it for my girlfriend and she had it for about a week. I got into her car and back the drivers seat up and squished the face of itFrom looking online and other videos all it shows is four digits and then PSI. The window for the display is curved so the LCD displays the output slightly curved which is the only thing "special" I can see. Back of the LCD board is a TM1722

author: george.b
author_rank: Frequent Contributor
timestamp: October 02, 2020, 02:42:00 am
content: You might be able to trace at least the pins on the unbroken side by looking at the LCD carefully, at the right angle. If it's just 4 7-segment digits, it shouldn't be difficult to cobble up a substitute.Can you take a picture of the back of the board?

author: coromonadalix
author_rank: Super Contributor
timestamp: October 03, 2020, 02:06:50 am
content: check page 10 of this datasheet maybe you could find something like the display shown

author: positrontime
author_rank: Newbie
timestamp: October 06, 2020, 12:32:52 am
content: Thanks for the info. I'll post more when it gets cold. I put it back together already so the lady can use the pump while she can before winter comes. I can operate it good enough without the lcd for now. It will be a good winter project.