I am repairing a Williams Pinbot.
One of the things I need to fix is the C-8365-1 display showing credits and match/ball in play.
The other displays are working perfectly.
The bottom display is dead.
Replaced it with a working display from Space Shuttle and found it working perfectly.
So the display driver board is good, Pinbot display glass is bad.
Since there are no electronic parts on the C-8365-1 display board it has to be the glass that's bad.
I desided to replace the display with one of the regular 6-digit display I had in my spare parts.
A regular 6-digits display does not work correctly without some adjustments to the connections.
The original C-8365-1 display uses 2x 2-digits and 2x 7-segment lines.
In fact it has two displays in one glass.
A regular 6-digit used 6 digit strobes and 7 segment lines.
If you connect the 6-digit display in place of the 2x2-digit display, only the two first (right side) digits will light.
And then the segments are not displayed correctly.
The 6-digit display can be adjusted to show the Credits OR Match/Ball-in-Play section only.
Since credits are not important in a freeplay situation, I desided to go for the Match/Ball-in-Play option.
Thus using only the two most right digits (units and 10's).
Be aware that the number for the glass differs from the pins at the connector.
The changes can be seen in the drawings.