Accessing the switch on the Q2

[maxman]

Instead of opening up the loco, why not change the cv setting that controls F7.

CV246… Set to 0; Turns Smoke Unit off when Power is Applied. Smoke will not come on unless you press F7 (or perform a reset and forget to reset 246 to 0 again}. This is a safety feature to prevent all your smokers from burning up all the smoke fluid just sitting on a siding.

That sounds like a workable solution. The question has been asked on the BLI forum and Matt will probably respond in a day or so if you still want to manually shut it off.

This process of changing CV 246 to zero is mentioned in a BLI technical update bulletin called “Fine-Tuning Your PRR Q-2 Model For DCC Operation”: http://www.broadway-limited.com/support/Fine-tuning%20DCC%20operation.pdf