Description: Pinball repair fixes and log by Georg Hinterhofer, offering non-commercial pinball help.
repair (11108) pinball (356) wpc (167) stern (146) pinball repair (13) data east (9) pinball fix (2) georg hinterhofer (1) hiho (1) sys11 (1)
Issue: The right display is missing two segments on each digit, plus the last digit is missing totally.
As you can see, the last digit is missing (a zero) + the left two segments are missing.
Solution: Lets start with the missing segments - System 11 displays are controlled by strobes (which are all the 16 digits) and segments (eg the -- in a digit). The display tube is being strobed constantly so your eyes don't realize that the digits are not lit at the same time, but serially. For each digit being strobed, the corresponding segments are being triggered.