habik
10-23-2015, 07:21 PM
We have a customer with ongoing problem of document feeder skewing and jamming a lot (Transport section mainly)
I had a closer look and there is nothing in the paper path and tyres are clean all rollers clean and turn smoothly. I have adjusted the ADF in every possible direction to the maximum the adjust able screws could go. It improved for a bit and then it went back the square one. So there is something else. Customer then showed me some of the scanned documents(Pdf looked a bit distorted and skewed). I was testing predominantly COPY function. When scanned from glass all good, When ADF used skewed. Today I have noticed the slit glass home position is not always to the check point. When tested in Service mode, the actual Sensor is switching (Manual movement of the slit glass), but during calibrations or scanning it not always reach the HP. I looked for any obstruction in mechanism and all clear, so gave it a bit of a lube, to improve movements. When I was happy with some sort of skew level I done successfully Feed Zoom Adjust, Auto Stop position adjustments worked only in Sub scanning direction, Main scanning direction however came as unable to perform. That put me on complete stop as what it could be.
What is your best guess to pick. As firmware did not solve the issue. Would it be Relay boards, motor or PRCB.... I don’t have any other machine to try from. Are the motors the same as C451 range? Or the relay boards? I know that MFPB or PRCB aren’t the same but the small pieces should be, shouldn’t they.
Many Thanks
I had a closer look and there is nothing in the paper path and tyres are clean all rollers clean and turn smoothly. I have adjusted the ADF in every possible direction to the maximum the adjust able screws could go. It improved for a bit and then it went back the square one. So there is something else. Customer then showed me some of the scanned documents(Pdf looked a bit distorted and skewed). I was testing predominantly COPY function. When scanned from glass all good, When ADF used skewed. Today I have noticed the slit glass home position is not always to the check point. When tested in Service mode, the actual Sensor is switching (Manual movement of the slit glass), but during calibrations or scanning it not always reach the HP. I looked for any obstruction in mechanism and all clear, so gave it a bit of a lube, to improve movements. When I was happy with some sort of skew level I done successfully Feed Zoom Adjust, Auto Stop position adjustments worked only in Sub scanning direction, Main scanning direction however came as unable to perform. That put me on complete stop as what it could be.
What is your best guess to pick. As firmware did not solve the issue. Would it be Relay boards, motor or PRCB.... I don’t have any other machine to try from. Are the motors the same as C451 range? Or the relay boards? I know that MFPB or PRCB aren’t the same but the small pieces should be, shouldn’t they.
Many Thanks