Williams Soundboard Tester V1 |
Williams Soundboard Tester V1.2 with SR and 5V |
Williams Soundboard Tester V1.3 with SR and 5V  |
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D11581 Sound Board
J2 connection – POTS switch for the volume J3 connection – Power J5 connection – Speaker
On the Bench Power Supply, J3 pin 3 (-12V) had to be connected to the ground. You can use the “O” on the bottom left side of the board to connect a wire between J3 pin 2 (-12V) and the ground on the screw hole on the bottom left side.
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D11581 sound board connected on bench:
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- Connect the sound board tester using the IDC20 ribbon cable to J4 on the sound board.
- All dip switches should be set for ON (UP) when first connecting.
- Select Reset button
- Move some dip switch buttons down. Example: Move Dip Switch 1 and 2 down.
- Select strobe button.
- Sound will generate
- Repeat steps 3-5, with different Dip switches selected.
The sound tester can also be used when mounted in a game. Disconnect the ribbon cable from J4 on the sound board. Connect the sound board tester. Turn on game. Test using the same procedure above.
Version 1 of the Williams System 11 Pinball Sound Board has been tested with a D-11581 sound board. These sound boards have a SRC installed, like below. Other version of the Sys11 Williams sound boards that do not have a SRC installed will require a later version of the sound board tester that includes a SRC and requires an additional 5v power source. This additional requirement is not required for the D-11581 sound board.
Version 1.2 and 1.3
Additional 4.7Kohm pull-up resistor connected to 5VDC. This guarantees that the signal is held at logic high until the PIA grounds the signal. Soundboards that do not have this installed will require this version of the tester. Tested with models D-11297, C-11029, and D-11581 (does not require SR or 5V but works with tester)
Connect 5V and GND. You can connect to the 5V and GND terminals on a System 11 MPU.
| Williams System 11 Sound J21 connection from MPU:
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Youtube references: