Lexmark T620 Service Manual - Page 87

4069-5XX/7XX Operator panel displays 260 Paper Jam after attempted feed but before envelopes are put in the hopper OR the operator panel continues to display "Load Envelopes" after envelopes are placed in the hopper. Service Tip: The kick rolls rotate during the attempted feed cycles. FRU 1 Envelope Out Hopper Sensor Flag 2 Envelope Out Hopper Input Sensor Action Check the envelope out sensor flag for damage, correct installation and operation. If incorrect, repair or replace the flag. Check the sensor to make sure it is installed correctly and the sensor cable is properly connected to the envelope system board. If correct, perform the Envelope Feed Sensor Test to check both the sensor and flag. If the test fails, remove any envelopes in the hopper, turn the printer off and disconnect J3 from the system board. Turn the printer on and check the voltage at J3-3 on the system board. The voltage measures approximately +5 V dc. If incorrect, replace the envelope system board. If correct, replace the input sensor assembly. Diagnostic Information 2-59