dc242 077-129 fault code - duplexing jobs

Previous faults with finisher, seem to be resulting in this 077-129 fault whenever any duplexing is attempted. Any one know a cause/solution?

A consistent 077-129 fault code - No apparent jams or blockages in paper path. correct and different papers tested... cleaned through... turned off and on several times... still same fault with every trial of a duplex print! Any ideas?

 

Sorry don't know how to fix it, but the code relates to this message ' Paper from Duplex did not turn on the Regi Sensor within the specified time'

I'm not an engineer, but the 'Regi Sensor' might be short for Registration Sensor. Maybe there's some dirt or something on the sensor? Maybe someone else could tell you where that sensor is located, so that you could check it.

One thing I have discovered (and nobody from the paper suppliers has been able to give me an answer for this) is that papers from different manufacturers are often cut wrong ie. A3 is supposed to be 297mm x 420mm - I have put this paper into my guillotine and, setting the sizes to A3 dimensions have cut off about 2mm from both edges. This might not seem a lot, but some of these photocopier sensors are pretty precise, and that could throw the timing sensors right off. As I said, I'm no expert, but you could maybe experiment with this - especially if you've set up your trays in the tray set-up part, check the paper sizes there with the ACTUAL size of your paper.

 

Thanks for info - I have checked physical paper and changed it also, still results in same 077-129 code. even duplex copying on standard A4 sheet, results in same - side one printed, then sheet sent out of output slot, to stop with last 2cm in rollers - 077-129. It seems to me this is not the correct path for a duplex job to follow (the output slot), as it should only come out of here after printing side 2????

 

077-129 is a jam in duplex caused by duplex in sensor, inverter gate not operating properly, or the inverter motor not operating properly. The RAP for this problem will find the problem and searchlite has many fixes.

 

Hi just updating as fixed it.
Fault not sensor, it was the diverter gate not operating correctly for second side print in duplex. Have had the door apart and replaced the diverter gate assy.
WORKING! The old gate had a tiny little plastic nodule on one end that operated by the the switch and moved gate open close positions, but this little lug was broken off. Thanks to all for their help along the way.. Got work to catch up on...