Just got this wired up. The doc says the backlight should default to on. So I guess it should come on simply applying power (5V Vin & GND)? The unconnected ‘Lite’ pin is at 5V and jumping it high or low has no effect. I think the LCD is working as I can dimly see the demo program running. Seems the backlight is dead, just want to confirm I’m not missing something, maybe there’s a common problem/fix?
Hi,
To help you troubleshoot the issue with this product, could you please provide us some clear pictures ?
Regards,
…well, to answer my own question - Yes, if you just connect power (VIN, GND) the backlight should come on. The LCD is attached to the PCB with…double-sided tape(!)…and mine was a little cockeyed. Unstuck it and wiggled it a bit and sure enough the backlight came on, apparently something amiss in the flex connection. Unfortunately I couldn’t see any obvious flaw and it was very touchy. Almost had a solution where I used a rubber band to hold the LCD & PCB together just so, but it was still flakey if you moved the lashup. Fooled with it some more and then the flex cable broke at the PCB. Think I’ll shop around for a more robust unit. But for anyone who purchases this one I suggest first thing (before soldering a header, etc.) temporarily connect VIN & GND and make sure the backlight comes on - if not don’t try to fix it, just send right back.
Please contact us through our Support Center referring to this post and we will exchange the RB-Ada-450 for you.
…Thanks, will do.
Just to follow up I received the new unit and it is working properly so thanks for your support. I feel it might be helpful to point out for others considering this unit that the ‘sticky tape’ method of attaching the LCD to the PCB isn’t very robust. The replacement unit, like the original, has the LCD stuck on slightly rotated, need more care during assembly. And as it heats up in use one side is starting to unstick, the folded flex cable is acting like a spring pushing the LCD off the PCB, need stickier tape I guess. It’s OK for hobby/proto, but wouldn’t be suitable for a real product due to imprecise tolerance and fragility.