Displays, displays, displays…

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!

Three 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!

4x2-digit displays boards and failed ZM modules

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.

Display driver boards waiting for parts

Pinball life is good!