I got my new mini playfield last night from Stern and installed it seems to be working much better. Stern didn't send me any instructions so I thought I'd give a little synopsis.
There are three nuts holding the mini playfield in on the underside of the playfield. I thought it should be an easy disconnect four connectors and remove nuts and your done. I was wrong!
First, I disconnected the connectors. There is one very thin ribbon cable that goes through the backboard to a mini circuit board behind the backboard and 3 molex connectors under the playfield for the 2 coils moving the playfield and the gate coil. I then unscrewed the three nuts holding the mini to the main playfield. There was a plastic underneath the mini that comes around the right side. The Plastic looks like a monkey wrench, one extremely thin arm going in front of the playfield about 6-7mm and the thicker part under the mini playfield. There are 2 screws that hold this plastic on. The problem was one was directly under the right ramp. I had to partially remove the right ramp to get to the screw. I removed 2 screws from the upper part of the ramp and loosened 2 towards the front of the upper portion. Removed the plastic and that I was clear until I released that the mini was not moving upwards.
Well, the right side ball guide rail for the bumblebee area covers over the hole where the left mini playfield coil goes through. I unscrewed the plastic that goes over the bumblebee car/ball/target. There is a cable tie that holds the plastic to the guide rail. I left it alone. I unscrewed the guide rail and was able to slide the mini out and put the new one in. Reassembled everything, plugged in connectors and everything worked. It was nice to finally see the ball actually moving around the mini.
Took about a little over an hour to do it. I didn't take any pics while I was doing it (which was actually stupid but I didn't have any left over screws). I'll take a picture of the old mini playfield assembly before I send it back to Stern and post them here.
I hope this helps anyone out that may need to shop out the pin in the future.
Tom.