Bally Williams System 11N / 11A / 11B / 11C CPU MPU Board

Bally Williams System 11N / 11A / 11B / 11C CPU MPU Board

Plug and Play direct 1:1 replacement with all features from the original.

Replaces Bally Williams D-10881-XXX, D-11883-XXX, D-11392-XXX
(5764-10881-00, 5764-12091-00, 5764-12206-00)

We have sourced all original components to bring you the closest System 11 replacement MPU on the market.

This board includes a fully populated audio circuitry, making it backwards compatible with all earlier games. It features the original Harris CVSD, TDA2003 main amp, 1458 op amps and 0808 (1408) DAC, making this board the only true to original System 11 MPU.

10 pin network resistors have been used, along with replacement SRC resistor/cap networks to replicate the original Williams layout.

We have included the original Fujitsu relay, and have even gone as far as sourcing the original side mounting reset switches to keep the layout as true to the original design as possible.

As well as using genuine WDC PIA’s, NVRAM is included to eliminate any possibility of battery corrosion. The original battery footprint has been kept in place to resemble the original PCB.

Lamp Column transistors have been upgraded to MOSFET’s to reduce heat, and the reset circuitry has been upgraded to use an MCP120 reset generator, and completely remove the flaky Williams reset design.

This System 11 MPU is the closest, direct plug and play replacement for all System 11 variations (11N, 11A, 11B, 11C).

Features include:
- Upgraded 4 Layer PCB, improving signal integrity whilst reducing EMI
- High quality gold plated vias and pads
- NVRAM Included (No Need For Batteries)
- High Quality Components
We only use genuine components from reputable companies,
(ST, Onsemi, Molex, Nichicon, TE Connectivity, Vishay, Yageo etc)
- All audio circuitry populated for compatibility with every System 11 game
- Easily switch between the included A and B audio daughter boards for true audio in both variants
- Every Chip Socketed for Easy Repair (All sockets are TE Connectivity)
- Upgraded Williams style mounting keyholes for easy install/removal
- Original Unpopulated AA Battery Footprint
- Upgraded Q64-Q71 Mosfets to eliminate heat - board has been thermal tested and runs extremely cool.
(Original transistor circuitry remains and can be used if desired)
- Resistor vent holes with isolated plains added under all lamp resistors
- Jumper pins added for quick game compatibility set-up
- Genuine/Authentic WDC 6821 PIA’s
- Original socketed Japan FRL relay for easy removal
- Shrouded IDC Ribbon Cable Headers
- True to Original (Original Schematics Can Be Used)
- Supports Every Single Game as the Original
- 12 Months Local Warranty
- Designed & Assembled in Australia

Game Compatibility:

SYSTEM 11N

High Speed
Grand Lizard
Road Kings

SYSTEM 11A

Pin*Bot
Millionaire
F-14 Tomcat
Fire!
Big Guns

SYSTEM 11B

Space Station
Cyclone
Banzai Run
Swords of Fury
Taxi
Jokerz!
Earthshaker
Black Knight 2000
Police Force
Transporter the Rescue
Elvira and the Party Monsters
Bad Cats
Mousin’ Around!
Whirlwind

SYSTEM 11C

The Bally Game Show
Pool Sharks
Rollergames
Diner
Radical!
Dr. Dude and his Excellent Ray
Riverboat Gambler
Bugs Bunny’s Birthday Ball