I have a newer Stern (Ripley's) with an I/O board issue. The MOSFET at Q16 (lower right flipper) fried and when I went to look at it, it had previously been repaired by the worlds worst solderer. All the traces had been lifted and solder blobs replaced the traces. That much I can fix.
Based on a recommendation on Pinside I replaced the STP22NE10L (NTE2396) with an IRL540N which is supposed to handle higher amperages. But it still doesn't work. At least now it is not locked on, it just doesn't respond.
What I need to know is what are the voltages supposed to be on the three legs. I am getting 75v on the middle leg of Q15 and 12v on the middle leg of Q16. Ground (leg 3) is reading 0 on both and I don't remember what the first leg was reading.
If this ring a bell with anyone, please let me know.
Also, if there are any recommendations on repair facilities, I am open to shipping it out. I just want it fixed right.
Thanks.
ken
Based on a recommendation on Pinside I replaced the STP22NE10L (NTE2396) with an IRL540N which is supposed to handle higher amperages. But it still doesn't work. At least now it is not locked on, it just doesn't respond.
What I need to know is what are the voltages supposed to be on the three legs. I am getting 75v on the middle leg of Q15 and 12v on the middle leg of Q16. Ground (leg 3) is reading 0 on both and I don't remember what the first leg was reading.
If this ring a bell with anyone, please let me know.
Also, if there are any recommendations on repair facilities, I am open to shipping it out. I just want it fixed right.
Thanks.
ken

