Author Topic: NHD-C0220BiZ-FSW-FBW-3V3M fails premature  (Read 3060 times)


  • Newbie
  • *
  • Posts: 1
  • Karma: 0
    • View Profile
NHD-C0220BiZ-FSW-FBW-3V3M fails premature
« on: July 29, 2015, 11:59:59 AM »
I am using the NHD-C0220BiZ-FSW-FBW-3V3M and it appears to operate fine initially, then fails after time (from a week to a few months).  On analysis I see that pin 6 or 8 are high impedance as their voltage starts at 3.3 volts, then drops to zero. The rest of the pin inputs are perfect.
I do have the capacitors recommended by the data sheet on these pins.  It appears to occur at 1 installation but other identical installations are fine.  It is used in homes so the temperature is always room temperature, but the humidity may be high in the home with the failures.
The back lighting is only on when someone presses a switch to access the display information.


  • Administrator
  • Hero Member
  • *****
  • Posts: 357
  • Karma: 34
    • View Profile
Re: NHD-C0220BiZ-FSW-FBW-3V3M fails premature
« Reply #1 on: July 31, 2015, 08:31:45 AM »
It seems you may be correct in your assumption about the humidity.  The display is tested at 90% humidity, so if running for a while at or above 90% humidity, the display could most definitely fail.  If there is a way to test the humidity in the failure part's environment you may find it goes above our pass criteria, as it seems the other units you have are running good.  Humidity is a display's worst enemy!  :'(


NHD‐C0220BiZ‐FS(RGB)‐FBW‐3VM capacitor on pin 7&8

Started by Ticoti0xFFBoard Character LCDs

Replies: 1
Views: 4755
Last post April 09, 2014, 10:17:30 AM
by Michael_L
NHD‐C0220BiZ‐FS(RGB)‐FBW‐3VM Potting

Started by SebKisterBoard Character LCDs

Replies: 1
Views: 3809
Last post June 22, 2016, 04:51:17 PM
by Saurabh_B
Blank Display on NHD‐C0220BiZ‐FS(RGB)‐FBW‐3VM

Started by SteveCBoard Character LCDs

Replies: 3
Views: 8880
Last post May 13, 2014, 12:04:36 AM
by SteveC
NHD‐C0220BiZ‐FS(RGB)‐FBW‐3VM - Cable for LED Backlights

Started by wadehBoard Character LCDs

Replies: 2
Views: 2925
Last post December 02, 2016, 06:02:27 PM
by wadeh
Sample Code Question for NHD‐C0220BiZ‐FS(RGB)‐FBW‐3VM LCD

Started by SteveCBoard Character LCDs

Replies: 2
Views: 5948
Last post July 31, 2014, 08:44:29 PM
by SteveC