(Topic ID: 300251)

Match/credit display C-8365-1 replacement System-11

By Inkochnito

6 days ago

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  • Latest reply 6 days ago by Inkochnito
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Display_C-8365-1_2x-2_digits (resized).jpg
Display_6-digits_working (resized).jpg
Display_6-digits_drawing (resized).jpg
Display_2x2-digits_drawing (resized).jpg
Display_6-digits_adjustment2 (resized).jpg
Display_6-digits_adjustment (resized).jpg

#1 6 days ago

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.

Display_C-8365-1_2x-2_digits (resized).jpg
Display_2x2-digits_drawing (resized).jpg
Display_6-digits_drawing (resized).jpg
Display_6-digits_adjustment (resized).jpg
Display_6-digits_adjustment2 (resized).jpg
Display_6-digits_working (resized).jpg

#2 6 days ago

You can put the 6-digit glass on the Credit/Match board after you remove the defective old glass.
Of the new 6-digit glass, solder in the following pins;
pin 2 (segment a),
pin 3 (first most right digit, units),
pin 4 (segment b),
pin 6 (segment c),
pin 8 (second from right digit, 10's),
pin 32 (keep alive -100V),
pin 35 (keep alive +100V).
All other pins should be above the board.

Use a wire to connect the following board holes;
hole 5 to glass pin 38 (segment g),
hole 10 to glass pin 34 (segment d),
hole 11 to glass pin 36 (segment e),
hole 14 to glass pin 40 (segment f).
Remember the glass starts counting the most right pin as number 2, counting to the left as seen from the front of the display.

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