Aussie Pinball Forums > Circuit Board Repair Guides

Stern Solenoid/Driver Board - RevC

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Strangeways:
Those voltages look fine.

A fried coil will most likely be the associated driver transistor (TIP102) on the SD board. Even though it measures correctly, it takes 2 minutes to replace it.

Sinbad79:
Thanks Nino.
I've decided to refresh the board anyway, and upgrade the bridge rectifiers to the larger 25amp version.
I'll also replace the fuse holders, and connector pins.

There is an issue with the displays not working on the machine, so I've replaced the diodes as a precaution as well.
Here's a photo of progress.

Homepin:
That looks nice - be aware that most of the PCB holes are 'plated through' so ensure you maintain the through board connection.

Sinbad79:
Yea, will solder both sides of the board where relevant.
Factory solder on these boards is an absolute mess - tempted to completely remove silk screening and solder but wont go to that much trouble.

What rating are the fuse clips?

studley67:
do not overlook the connector pins,they DO lose their tension.

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