bizhub doc feeder

[digicor]

i have two bizhub's that do this:
when you power up the machine the doc feeder goes off with a jam detect, you open the doc feeder reset it and its solved? only at power up does this happen. and of coarse there is nothing in it.... what gives?

[minimerlin]

You need to do the sensor auto adjust for the adf.

[crm.84]

If you get a NG for results after performing the adf auto sensor adjust, you may need a new adf control board. I have seen this symptom before.

[digicor]

Thanks
I will check that out

[Taminol]

i have two bizhub's that do this:
when you power up the machine the doc feeder goes off with a jam detect .......

I had this on a C252, exactly the same symptoms as you. I did the sensor check and they all came out OK.

It turned out to be Turnover Sensor PC5, it was dusty - that was it !
I guess at initial switch on the sensor was cold?
Then it warms up as the voltage flows?
Who knows.
All I know is, I cleaned it 6 months ago and haven't heard a peep since.