Displays, displays, displays…Posted: 21 September 2011
Guess what I’ve been doing yesterday… correct! Fixing displays…
As you might remember from a previous post, I had two working displays and three that needed work.
Well, after a days work, I have three working displays, and components ordered to make that five (5) working displays!
I had three 4×2 digit display boards with faulty ZM modules. So after some soldering magic, I now have two more working 4×2 digit display boards and one with two (possibly three) faulty ZM modules. Luckily I found a fellow enthousiast who has a few Valvo ZM1550 modules to spare, so there should be four of them coming my way soon! YAY!
Three of the display driver boards were faulty. After some testing, I found one board with a faulty IC2 (4042) and two boards with a faulty BF422’s. From the two boards with the faulty BF422’s, I made one working one. With the BF422 transistors and the 4042 chip on order, the display driver boards should be ready.
Pinball life is good!