High Voltage Revision

A few days before Christmas I got a call from a guy whose Taxi I repaired over a year ago, informing me that he now has a No Fear but that the display is “bad”.  Basically this could be anything but with some measurements and a few calls for doublechecking it became clear that the High Voltage section of the display board had gone poof.  Repair kits exist online so these components rapidly arrived by mail and the board could be revised with all new shiny components in the high voltage section.

The “before” picure. The negative voltages both matched at about –120v.  Only R8 measured out of scope but just replace everything, as most likely other components have toasted as well.

Getting the PDF manual its best to print out the page showing the display board and marking the components that need to be replaced and use the parts list as a guideline for what goes where once you open up the goodie bag of shiny new components

All parts layed out and taped to a piece of paper.  Basically work our way thru – easy parts first, well after we got the board emptied out.

An hour of desoldering later.  An “empty” PCB.  This will get a bit of a cleaning before the new components go on, taking away the years of Pinball Dust that have accumulated

New components installed.  Not much more to say.

And here are the old components and cut wires from the new ones.  This is for mister trashcan, unless someone would want an old burnt-out transistor – nope I didn’t think so.