I recently had an issue with my IJ where the right ramp flashers were all locked on. Thanks to some digging and some guidance from Pinside, it was isolated to a single faulty transistor on my Rottendog driver board (WDB089). I replaced it, and that seemed to solve the problem of the flashers staying on, but now the flashers in question are…dimmer? Only the ones associated with the right ramp, though – all other flashers are just as bright as ever. You can see it in this test mode video comparing the normal bright left ramp flashers to the now dimmer right ramp:

The Rottendog board is laid out a bit different than the original board was. For one it has far fewer transistors than listed in the original manual, and instead has a whole bunch of what appears to be surface mount resistors on the backside of the board behind the transistors, making transistor replacement a little trickier. I wish I had taken a picture, but everything is already hooked back up.

Anyone with a Rottendog power board have any insight on this? Problem with the new transistor? Improper placement of the resistor on the backside? Something else I’m missing? I’m still an amateur when it comes to electronic components, so any simple explanation or thoughts on a possible solution is appreciated!

Thanks!

It doesn't? Well, shoot. I used a TIP102 transistor to replace the transistor at Q24 based on the advice I got in another thread.

What should I have used?

Aw hell. I just used TIP102 since that's what I had on hand, and what was recommended to me. Stupidly, I never thought to read the actual component myself, which is 100% my fault.

Looking at it now, I see this:
Screenshot 2022-01-03 174710 (resized).jpg
You can see the replacement at Q24 amongst all the board originals.

Thanks for that! Maybe you can help me out with one more thing...
Of all the markings on the Rottendog component, I'm not sure what to call this other transisitor (H16 FQP 13N10L?). i.e. What should I actually be searching for on DigiKey?

Thanks, all! Back on track - appreciate the help.

Good to hear, I'd prefer to order from within Canada. Ordering from Marco is a minimum $40 international shipping charge, which goes for most pinball-specific suppliers in the States.

I'll just grab a handful of 13N10L transistors from a local supplier. Thanks!