I have a Sharp MX-4141N with power-on jam. Jam code is POD1_FUS. I know it says winding in the fuser, but I've checked the fuser, replaced the fuser, replaced the POD1 sensor, checked the connection from the sensor all the way to the PCU PWB and replaced the PCU PWB with a known working board. The jam happens on power up every time. I've swapped the delivery unit with another known to be working. Any helpful tips would be appreciated. This is the machine we use in the shop for small customer print jobs. Thank you.