The switches looks fine so I took a look under the playfield. The motor wire apparently goes to a “Bridge driver board”. So it would appear to be either this pcb or the actual motor.

I see there is an LED on this Bridge driver board that is lit red when the machine is powered on. Is this normal or is the lit LED indicative of something defective.

What does the bridge driver board on Indiana Jones do?

Thank you

FBA1D626-0ACE-46A3-8022-A1904E198395 (resized).jpeg

#2 3 years ago

???

pins4u

Pinside member

Gaborone

3y 36,900 1,138

The 'bridge driver board' does exactly what the title suggests - it drives the motor.

It is starting to become a common fault with these and similar boards. Mainly the driver chip fails on the board.

The LED on is telling you that the board has power, that's all.

I would check for cracked pins on the board and make sure all wires to the motor are intact - after that it's probably cheaper to replace the board.

https://www.pinballlife.com/bridge-driver-replacement-board-for-williams-indiana-jones-a-15946.html

#3 3 years ago

???

Cmjb13

Repro parts

Long Valley, NJ

6y 36,050 361 7

Thanks for the information

In the switch test menu, I passed my finger by switches 32 and 33. The DMD showed that my finger passed by and that the switch works, albeit in the wrong position.

Does this indicate that it’s not an issue with the opto board?

https://www.marcospecialties.com/pinball-parts/A-13901

#4 2 years ago

???

Cmjb13

Repro parts

Long Valley, NJ

6y 36,050 361 7

Bridge driver board replaced and it’s back up and running. No more error and game automatically calibrated basket. Thank you.

#5 2 years ago

GPE

G-P-E

GPE

Omaha, NE

14y 76,800 2,778 4

Save the old board: two optos, one 7805 regulator, one bridge circuit and a cap. About $10 worth of parts to have shot-gunned the old board.

#6 2 years ago

???

pins4u

Pinside member

Gaborone

3y 36,900 1,138

Quoted from G-P-E:
Save the old board: two optos, one 7805 regulator, one bridge circuit and a cap. About $10 worth of parts to have shot-gunned the old board.

Some people simply don't have the skills, time or just couldn't be bothered to repair simple boards like this.

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