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Replacement wiring harnesses for
Gottlieb System 1 and System 80

Brand new wiring harnesses built with 100% new parts.
Quite often these need to be replaced as the pins in them get damaged or have corrosion on them.

Please read the installation instructions >>>Click Here<<<

Gottlieb System 1: Power Supply to MPU

$10.00 Each Sys 1 Harness PS to MPU

Gottlieb System 1: MPU to Driver

$27.00 Each Sys 1 Harness MPU to Driver

Gottlieb System 1: MPU to Driver with diode protection

Just like the MPU/Driver Harness above, but with built in diodes to protect your MPU from blown solenoid transistors.

Take a look at this picture of a System-1 Driver. You'll notice the seven circled diodes. These diodes are there to protect your MPU in case a driver transistor should fail and allow solenoid voltage (24 VDC) to travel from the driver board to the MPU. Should this happen, your MPU would suffer damage, and in the case of an original MPU possibly permanent damage (fry a spider chip).

Early System-1 Drivers did not have these diodes, and there are many of these boards out there. Eventually Gottlieb realized their mistake and a
revised board with diodes replaced the earlier driver boards.

If your System-1 Driver does not have the diodes, then you run the risk of MPU damage should a driver transistor short out. The three choices you
have are: Replace your driver with one of the later revisions that have the diodes, install diodes on your board (takes know-how, tools, soldering
skills, and parts), or leave it as is and hope the bad stuff never happens to you.

Now there's a 4th option: Buy one of these System-1 MPU to Driver harnesses with built-in diode protection. Wired in-line with each solenoid data line
is a 1N4004 silicon diode which will block all voltage coming back up from the Driver to the MPU. The diodes will not interfere with the normal opera-
tion of the two boards. In fact, should you use a protected harness and then later get a revised driver, the harness will still work.

$34.00 Each Sys 1 Harness w/Diode protection MPU to Driver

Gottlieb System 80: Power Supply to MPU

$10.00 Each Sys 80 Harness PS to MPU

Gottlieb System 80: MPU to Driver

$34.00 Each Sys 80 Harness MPU to Driver

Nevada residents must include 7.375% sales tax. which will be automatically figured into your PayPal shopping cart

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