Game check-out, part 3: walk through bookkeeping and self-test

Steps

• Press the play-test button inside the coin door to enter step 1; press it again to move on.
• To skip the 15 bookkeeping steps and go straight to the tests, press the credit button right after the play-test button.
• In steps 1 to 15 check the totals and score levels, and confirm the credit button clears and raises the score settings.
• Step 16 cycles the CPU-controlled lamps, relays and coin lockout.
• Step 17 fires the CPU-controlled coils one by one.
• Step 18 reports any switch that is closed.
• Step 19 tests the displays.
• Switch the game off and on and repeat the first checks to confirm the battery kept the settings.
• Step 20 shows on the player 1 display whether any memory chip has failed.

Systems

• Gottlieb System 80
• Gottlieb System 80A

Related tips

• Switch test (step 18) shows switches closed
• Buffer chips protect the control board LSI parts
• Bookkeeping totals or score levels are wrong or missing
• What each System 80 board does
• Game does not power up properly
• Scores light at once and the status display stays dark
• The play-test button will not start the test sequence
• A display segment or digit is always on or always off

Source: System 80 Service Manual, Gottlieb