Lexmark C782 Service Manual - Page 90
INPUT TRAY, TESTS, Sensor Test, MP Feeder, Actions and questions, Friction, buckler
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5061 Step 5 6 7 8 9 10 11 12 13 Actions and questions Open the MPF to the horizontal position, and check the paper path for obstructions. Is the paper path obstructed? Raise the pick tire off the media, and test the MPF. Does the pick tire turn? Open the lower jam access door, move the MPF bracket assembly gear to the lowest position and test the MPF. Does the MPF bracket assembly rise and engage the gear? Does media jam on the friction buckler? Enter the Diagnostics Menu. Select INPUT TRAY TESTS, Sensor Test, and MP Feeder. Manually actuate the MPF sensor by moving the paper flag in the MPF. Does the test pass? Make sure that the MPF sensor cable from the system board is correctly installed at J10 on the system board. Is the cable correctly installed? Check the cable connection between the MPF sensor cable and the sensor. Check that the sensor is snapped into the bracket. Is the connection good between the two cables? Disconnect the sensor cable from J10 on the system board. Measure the following voltages on J10, being careful not to short any adjacent pins in the connector. All voltages are approximate values. Connector pin Voltage J10-11 0 V dc J10-12 +5 V dc J10-13 +5 V dc J10-14 +5 V dc Are the voltages correct? Check continuity of the sensor cable that is between the system board and MPF assembly. Is there continuity? Yes Clear the obstruction. Go to step 8 Go to step 8 Replace the friction buckler. See "Friction buckler and buckler housing removal" on page 4-40. Replace the MPF assembly. Go to step 11 Go to step 12 Go to step 13 Replace the sensor assembly. No Go to step 6 Go to step 7 Replace the MPF bracket assembly. Go to step 9 Go to step 2 Install the cable correctly. Install the cable correctly. Replace the system board. See "System board removal" on page 4-89. Replace the sensor cable assembly. 2-48 Service Manual