Document feeder not working (MP 4002sp)

[sharpmind]

There is no response in the feeder when original is set and when the Green button is pressed. All mechanisms are working during output check. I tested the document feeder in the other machine and it is working fine. Scanner board and document feeder detection sensor are also changed and the Lens unit assembly is also tested but still same problem. Any ideas?

[tjvincent]

Try a power supply

[cba]

Try a power supply

please check the sensor which is under feeder

[sharpmind]

Try a power supply

Check the voltages in the power supply unit. No 5V measured in the connector going to the scanner board unit. Problem solved!

[sharpmind]

Try a power supply

Check the voltages in the power supply unit. No 5V is measured in the connector going to the scanner board unit. Problem solved!