Bally Mystic Coin Door Adjustments

The -35 MPU used on the Bally Mystic pinball machine has several diagnostic tests and setting adjustments you can make via the small switch located on the inside of the coin door. The diagnostic tests consist of a lamp test, a display test, a solenoid test, and a stuck switch test. The adjustable settings are stored in the MPU's static RAM, and if you do not have a battery or memory capacitor, they will be lost when power is removed from the machine.

To run the diagnostic tests and/or change the settings, you must power up the machine, then press the small switch located inside the coin door. The first 4 presses are diagnostic tests. Pressing the button for the 5th time will take you to the first adjustable setting.

Press Test Comments
1 Feature Lamps All controlled lamps will be flashed on and off
2 Display Driver All displays will count from 000000 to 999999
3 Solenoid Test Each solenoid will be energized, one by one, and the solenoid's number will appear in the player score displays.
Click Here for a list of solenoids and their associated test number.
4 Stuck Switch The number of the first closed playfield switch will be displayed in the player score displays. If no switches are closed, '00' will appear in the Credit/Ball-In-Play display. If a switch number does appear, that is just the "first" closed switch that was discovered. Once the switch is freed, there may be others.
Click Here for the list of switches and their associated test number.

By pressing the switch for the 5th time, you will be able to visit and adjust the various settings that are stored in the MPU's static RAM. If you don't want to run the diagnostic tests, you simply power up the machine, then press the button quickly 5 times, and you will be at the first adjustable setting. The setting's current value stored in memory will be displayed on all four player displays, and a bookkeeping identification number (05-11) will be displayed on the Match/Ball-In-Play display.

Press ID
Number		 Meaning Values Notes
5 01 First High Score Threshold 0 - 990,000 Advance w/ the Credit Button (10,000 per push)
If set to '00', high score for the 1st threshold is disabled
Set to '00' quickly by pressing the S33 switch on the MPU board
6 02 Second High Score Threshold 0 - 990,000 Advance w/ the Credit Button (10,000 per push)
If set to '00', high score for the 2nd threshold is disabled
Set to '00' quickly by pressing the S33 switch on the MPU board
7 03 Third High Score Threshold 0 - 990,000 Advance w/ the Credit Button (10,000 per push)
If set to '00', high score for the 3rd threshold is disabled
Set to '00' quickly by pressing the S33 switch on the MPU board
8 04 High Score To Date 0 - 990,000 Advance with the Credit Button (10,000 per push)
Set to '00' quickly by pressing the S33 switch on the MPU board
9 05 Current Credits 0 - 40 Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch
10 06 Total Plays 0 - 99999
*see note*		 Total payed and free games
Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch
11 07 Total Replays 0 - 99999
*see note*		 Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch
12 08 Total times High Score To Date is beat   0 - 99999 Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch
13 09 Coins dropped through Chute #1 0 - 99999
*see note*		 Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch
14 10 Coins dropped through Chute #2 0 - 99999
*see note*		 Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch
If Chute #2 is not used, the number displayed has no significance
15 11 Coins dropped through Chute #3 0 - 99999
*see note*		 Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch
If Chute #3 is not used, the number displayed has no significance
16 12 Number of Specials awarded
from Panel Specials Only		 0 - 99999 Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch
17 13 Number of minutes of Game Play 0 - 99999 Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch
18 14 Number of Service Credits 0 - 99999 Reset to '00' by pressing the S33 switch on the MPU board
or by pressing the Coin Chute #3 switch

*Note* - These values (marked with an asterisk) are factory set to 10000

Service Credits are designed to allow the serviceman to test the game under actual play conditions without disturbing the bookkeeping records that reside at identification numbers 06, 07, 10, 11, and 12.

To obtain Service Credits, push and release the Self-Test switch until identification number 05 appears in the Match/Ball in Play window, then hold the Credit button in until the desired number of Service Credits (up to 5) appears on the player score displays.

If "Total Plays" is reset to zero, then "Total Replays" should also be reset to zero in order to maintain the proper game percentage value.



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Created 10/22/03 - Last Modified 10/22/03 - Steve Kulpa Mail Icon Nolensville, TN
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