How would I go about finding a replacement LCD? - Page 1
Forum section: electronics / repair

author: eruat
author_rank: Newbie
timestamp: October 19, 2014, 01:52:14 am
content: Hi all, noob here..Really hoping I can get some help hereI stood on my Guitar effects Pedal the other day, pretty sure I've stuffed the LCD. So I pulled it apart and got the LCD out. But now I have no idea how to find a new one..The pedal is a Zoom G1Xon if that helps.I've attached a few photos, showing;The sticker on the top right hand corner of the display; with serial or product numbers (Gibberish to me)The codes on the flat flex (more gibberish)No idea where to go from here....Thank you so much if you can help

author: eruat
author_rank: Newbie
timestamp: October 19, 2014, 04:33:50 am
content: Have just looked a bit closer; it is about 43mm x 35.5mmThe flatflex has 18 (pins?) (wires?) thingies

author: marshallh
author_rank: Unknown
timestamp: October 19, 2014, 05:30:57 am
content: You are screwed, pretty much no way to get a replacement (chinese do runs of custom parts all the time)

author: Richard Crowley
author_rank: Super Contributor
timestamp: October 19, 2014, 05:38:57 am
content: For all practical purposes there are NO (zero, nada, zilch) "standard" LCD displays. They are essentially ALL custom-made and unique.The only two practical sources might be:1) If the manufacturer wanted to sell you a "repair part". But that seems extraordinarily unlikely given the cost of the unit.2) If you could find a used or discarded unit somewhere and "recycle" the display to "transplant" it.I know nothing about effects pedals, so I don't know if this is some rare and valuable piece of gear that would warrant extraordinary measures to revive?Other than that, it doesn't seem like a practical repair to me.The display module doesn't appear physically damaged from your photos. How did you confirm that it is broken?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: October 19, 2014, 06:02:07 am
content: Just because there's no display, doesn't mean the display itself is what's broken! Check other junk first, maybe the power connector got broken?Did you measure voltages? Check the backlight? Aren't these things meant to be stomped on anyhow?

author: sunnyhighway
author_rank: Frequent Contributor
timestamp: October 19, 2014, 08:51:53 am
content: Have you tried to run it on batteries instead of the usual external power supply?

author: harveyradar
author_rank: Contributor
timestamp: October 19, 2014, 11:38:16 am
content: I found this simple tester a while back(link seems to have now gone), built it and have used it with some success for determining the health of LCD panels.It may be of some help.good luckHarvey

author: wraper
author_rank: Unknown
timestamp: October 19, 2014, 01:55:35 pm
content: Quote from: harveyradar on October 19, 2014, 11:38:16 amThat is only for LCDs not containing any electronics. This one is a chip on glass.I don't see obvious damage so LCD might be OK. As of availability, it might be some (almost) standard 128x128 lcd if eruat is very lucky. Does it show some image? If nothing at all that counts +1 to LCD being OK.

author: amyk
author_rank: Super Contributor
timestamp: October 19, 2014, 04:03:32 pm
content: Are there any markings on the back?Looks like it's a graphic mono LCD, 128x96(?), no clue as to whether it's got a controller with built-in RAM or just a shift-register type driver.If you put a logic analyser or scope on the signals you might be able to figure out the controller/pinout. Then you just need to find a compatible module.

author: simingx
author_rank: Contributor
timestamp: October 20, 2014, 12:50:40 am
content: The panel looks fine (unless the flat flex has delaminated - unlikely!), see if you broke a solder joint at the power connector or elsewhere? Post pictures of the main board too, that would help