Smoke won't turn off in conventional mode

For conventional smoke, it either has a on/off slide switch to turn smoke on/off...or a screwdriver adjust trimpot to set smoke level (full ccw is off, full cw is full-on).  So I'd check to see if that wiring is compromised such as a short or whatever.

You should be able to pull the harness-connector that has the smoke control/switch from the PS2 board to turn smoke off (you'll of course lose whatever other functions are on that connector) but this would be a quick way to confirm a wiring or switch/trimpot issue.  If smoke remains on in conventional with the connector pulled, then you really have a problem as I don't think that's repairable by a mere mortal.

Thanks Stan,

It does the same in the PS2 test fixture, so I know it's not in the engine.

Both heat and fan running?  If the fets not short, check the pink to blue pins on the 12 pin header.  Bad joint?  If not, the processor is probably bad at the segment that register smoke switch position.  Had one of these before.  G

If you're at the connectors, just pull the 4-pin connector from the PS/2 board, I will certify that your smoke will be off.

gunrunnerjohn posted:

If you're at the connectors, just pull the 4-pin connector from the PS/2 board, I will certify that your smoke will be off.

Yes, I know that works, but I just like to have everything working if possible.

GGG,

The fan motor runs, but no heat on the board tester in DCS or conventional. Fan shuts off in DCS, but not in conventional. I think I would rather send the board to you, than me trying to fix it.

Later after checking out the PS2 board again:

My bad.  Smoke volume was set in low with DCS and I didn't see it with the board tester. The heat actually works in both, but DCS controls the volume in conventional also.  Whatever DCS has the volume set to, it carries over to conventional.

Sending the board to G.