Display tester GTB 80B

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Displays tester 80B

Tester of GTB 80B displays.

Very simple mounting to check the operation of alphanumeric display 2 x 20 of the SYSTEM 80B.

Presentation

We conducted a simple device (using an external power) to test our pinballs 80B gas displays.

Prototype

For this mount we have adopted a "Low cost" solution by retrieving a former display 7 digit SYS80A as a printed circuit board. The old components were dessoudes and instead we installed new using a few straps. We thus keep a directly usable connector and then simply cut the circuit to get a presentable board. This tester is essentially designed around a PIC 16F628A that send commands to the display module.

Display tester 80B

The device is connected to the display by a standard SYSTEM 80B wiring, power comes to plug into the third connector of the cable.

Display tester 80B

Achievement

Following many requests and our prototype working perfectly, we decided to produce a small series of modules. Installation is now in a much more professional finish and we have the opportunity to simplify (it has more than a single LED).

Assembly of the board presents no difficulty, the schema of implantation is downloadable below:

Documentation

In the end, the module with its printed circuit board, with serigraphy, double-sided, metalized holes:

Display tester 80B

Full wiring diagram:
Documentation

Compatible displays

All displays of the SYSTEM 80B, 2 lines of 20 characters, can be verified by this tester, which included modules:

  • MA-664 - SYSTEM 80B, 1st generation
  • MA-999 - SYSTEM 80B, 2nd generation (larger)

Display tester 80B

On the other hand, the SYSTEM 3 (MA-1361) displays are not compatible with this tester. Although gas displays is the same as the SYSTEM 80B of second generation, the control unit is totally different.

Displays MA-664, MA-999 and MA-1361

As seen in the photo, the electronic circuits used are not at all the same. To also be able to troubleshoot this type of display, we create a specific tester for SYSTEM 3.

Distribution

This achievement is available in our shop.

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Last update of this page: August 7th, 2018

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