Lexmark C750 Service Manual - Page 160
Lexmark C750 Manual
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5060-00x No indication that the chad box is full, no message Use the "HCOF error code table" on page 2-122 to help diagnose the problem. Step 1 Action and questions Make sure the chad box is correctly installed in the finisher. Is the chad box correctly installed. 2 Make sure the chad box cable S5 is properly connected to CN5 on the finisher system board. Is the cable properly connected? 3 Make sure the chad box cable is properly connected to the chad box sensor located above the box. Is the cable properly connected to the sensor? 4 Check the chad box sensor with a voltmeter. Empty the chad box. Check the voltages on CN5. The voltages read the following approximate values with the chad box empty: Connector pin Voltage CN5-1 CN5-2 CN5-3 +5 V dc +5 V dc 0 V dc +5 V dc supply sensor signal Ground Yes Go to step 2 No Install the chad box correctly. Go to step 3 Install the cable correctly. Go to step 4 Install the cable correctly. Go to step 5 Replace the finisher system board. Are the voltages correct? 5 Check the sensor by placing the chad box or a piece of paper in front of the sensor. As the chad box or piece of paper is moved away from the front of the sensor the voltage on CN5-2 should change from +5 V dc to 0 V dc. Does the voltage change? Problem solved Replace the chad box sensor. Chad box full message when chad box is not full Step 1 Action and questions Make sure the chad box is correctly installed in the finisher. Is the chad box correctly installed? 2 Check the chad box sensor with a voltmeter. Empty any material that is in the chad box. Measure the voltage on CN5-2. The voltage changes from approximately +5 V dc to 0 V dc as the sensor is activated. Does the voltage change? The sensor is working correctly. Replace the finisher system board. Yes Go to step 2 No Install the chad box correctly. 2-126 Service Manual