Electronics > Repair
Jts 111R / Carvin em901 - Desperate for LCD parts
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EEVPiobee:
Hello Eevblog community!
I'm tasked with repairing a Carvin EM901 inear wireless monitor system with a broken LCD display.
About the unit:
These were designed in the later part of 2000's but are still in production as of 2024 (but signs show they likely to be phased out in a not so distant future)
The unit I have to fix is a June 2024 production.
About the issue:
The current faulty part only shows black dots all over the 128x64 pixel it has, no matter what. And no matter on which controller it's plugged in.
Since I have another fully working unit (of the same gen/rev) to swap parts with, I was able to confirm that only the LCD is at fault.
About the part:
So far, the info I have:
Lcd is a green back-lit, 128x64 dot matrix with a 28 pin ribbon connector. (I manually counted the pixels on the working unit.)
The ribbon seems to have a 0.6 or 0.7 mm pad spacing on the Zif connector
It seems that the glass screen is 1.3 inch in diagonal if I measured correctly.
So far, I scoured the internet but can't find the match I need. I don't care for backlight color. If it fits and displays, it's good for me. I don't mind scavenging, but I want to order multiple units at a reasonable cost.
The back-lit still works to technically I would only need the glass part with the ribbon. The main Issue is either I find a 1.3 inch display but it has a 30 pin ribbon cable with the wrong zif cable or I find the correct ribbon with the wrong screen size.
Nothing on Digikey, and I must have spend countless hours on AliExpress/Alibaba
EEVPiobee:
More photos
amyk:
Have you tried asking the manufacturer?
Besides the physical size, there is also the question of whether the pinouts are compatible (even if the number of pins is correct) and the controller instruction set is the same.
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