9-11c Main Board (No longer produced):
This is a drop in replacement for all Williams System 9, 11,
11a, 11b and 11c
pinball and shuffle bowler games. Like all the other Kohout
Enterprises' boards, obsolete components have been designed out,
when possible, and up to date devices are used. The
board includes a 30 day unconditional guarantee and a 1 year repair/replacement
Some Improvements to the original are as follows:
No Battery Backup required -
Simple diagnostic LEDs added for troubleshooting.
LEDS where added to check critical All input and outputs
have LEDs for easy detection of malfunctioning drivers or
All input and outputs have LEDs for easy detection of
malfunctioning drivers or inputs.
Clearly labeled Jumper Setting and components are silk screened on
the board for easy identification.
Thicker PCB for improved durability - 0.093" instead of 0.063"
To switch from a System 9 board to a System 11 board only needs
jumpers updated. No soldering or removing components
No extra speech board needed for System 9 machines. Speech
board is built on our new board.
Uses original game ROMs. No special ROMs needed.
Difficult to find IC's have been designed out and
replaced with components that are currently available from
multiple sources. (Note: One chip still remains that is used on
System 9 and System 11 configurations)
problematic, and often fried resistor required for lamp drives
have been designed out for simple MOSFET drivers.
100V NMOS and
PMOS Transistors have been used for all outputs. This reduces
component count and, more importantly, power and heat
TVS added to protect solenoid driver MOSFET outputs. This
circuit protects the MOSFET even when diode on coil have been
removed or becomes disconnected.
One Shot Timers added to Special Solenoid outputs - If the
special solenoid outputs get stuck on for more than ~1sec,
output is automatically turned off to prevent damage to the
Output Short Circuit detection on all solenoid outputs - If
solenoid output is shorted, FET protection turns off the FET
until the short is removed -
NO MORE BLOWN UP SOLENOID OUTPUTS!
Each board comes complete with the replacement board, schematics,
board layout drawings, instructions, and all EEPROMs to
the game of your choice pre-installed. (Please fill
out machine name when ordering)
System 9 thru 11c Board Pricing:
System 9 Boards: $465
These boards require speech ROMs and a complete sound
System 11/11a/11b Boards: $445
These boards do not use the speech ROMs but use the
complete sound section.
System 11c Boards: $425
These boards do not use the speech ROMs or the sound
Replacement System 9-11c Board uses a 0.094" think board instead of
the original 0.063", which makes it much more rigid.