Lexmark 632n - T B/W Laser Printer Service Manual page 83

4060-xxx
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
990 Service Error, envelopes fail to feed from the hopper.
FRU
1 DC feed motor assembly
2 Envelope feeder system
board
260 Paper Jam displays, unable to clear and envelopes fail to feed from the
hopper—Kick rolls are not rotating.
FRU
1 Main drive belt
2 Gears
3 Clutch latch assembly
4 Master cam gear master/
kick gear
2-50
Service Manual
Action
Check the envelope out sensor flag for damage, correct installation
and operation. If incorrect, repair or replace the flag.
Make sure the sensor 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.
Action
Check the motor and motor cable for loose wires or poor
connections. Make sure the motor cable is connected to the envelope
system board.
Check the voltage on J4-1. The voltage measures approximately
+24 V dc. If incorrect, replace the envelope system board. If correct,
measure the voltage at J4-6. The voltage measures approximately
+5 V dc. If incorrect, disconnect J4 and measure the voltage again. If
incorrect, replace the envelope feeder system board. If correct,
replace the DC motor assembly.
Action
Check the belt for correct installation and for signs of damage.
Replace as necessary.
Check all the gears for correct installation and for signs of damage.
Repair or replace parts as necessary.
Check the clutch latch assembly to make sure it moves freely.
Check the master cam gear and master/kick gear to make sure they
rotate together. If not, then the tenons on the master kick gear may
be sheared off. If incorrect, replace the master kick gear.