Lexmark T620 Service Manual - Page 129

4069-5XX/7XX 271 Paper Jam - Check Bin 1 displays FRU 1 Bottom Pass Thru Sensor Flag Assembly Control Board Action Check the flag for correct operation, binding, broken parts or interference from the sensor cable. If incorrect, repair as necessary. If correct, check to make sure the bottom pass thru sensor is correctly connected to J5 on the control board. Disconnect the pass thru sensor cable and check the voltage at J5-3. The voltage measures approximately +5 V dc. If incorrect, check the voltage at J5-2. The voltage measures approximately 0 V dc. If incorrect, replace the sensor assembly. If this does not fix the problem, replace the control board. 274 Paper Jam - Check Bin 4 displays Service Tip: When a 274 Paper Jam Check Bin 4 message displays, a problem exists with the top pass thru sensor assembly or the control board. FRU 1 Top Pass Thru Sensor Flag Assembly Control Board Action Check the flag for correct operation, binding, broken parts or interference from the sensor cable. If incorrect, repair as necessary. If correct check to make sure the top pass thru sensor is correctly connected to J11 on the control board. Disconnect the pass thru sensor cable and check the voltage at J11-3 The voltage measures approximately +5 V dc. If incorrect, check the voltage at J11-2. The voltage measures approximately 0 V dc. If incorrect, replace the sensor assembly. If this does not fix the problem, replace the lower control board. Diagnostic Information 2-101