Lexmark 4049LMO Service Manual - Page 56

Paper Feed Problem, High Capacity Feeder, For all paper feed problems, Failure to feed, Multiple feeds

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4049-XXX Paper Feed Problem, High Capacity Feeder The paper feed rollers should be replaced every 200,000 prints or whenever feeding becomes unreliable. Clean rollers with alcohol or water at every service call. The feeder receives a pick signal from the printer, and will not do a test feed without the printer installed. Paper can be manually picked by rotating the paper feed rollers by hand, or by removing the upper paper feed motor screw, pivoting the motor downward, and rotating the gear. For all paper feed problems: Verify that the printer designator switch on the rear of the high capacity feeder is set to the correct printer model being used. Make sure the paper is undamaged, shingled correctly, properly installed in the tray, and is the correct weight (16 to 24 lb.) and size (letter or A4). Letter paper size and A4 paper size model feeders are available. Paper sizes are not interchangeable between the two models. Make sure that all paper in the tray is the same type and has not been run through the printer before. Envelopes and transparencies are not supported in the high capacity feeder. Jams: Make sure the printer is installed correctly on the feeder. Check for obstructions in the printer throat. Make sure the paper in the tray does not have excessive curl. Look between the printer and feeder to make sure the paper is entering the printer correctly. Failure to feed: Check the printer Paper Source menu for a "Tray 2" indication to be sure the printer detects the high capacity feeder. Check the condition of the feed rollers and clean with alcohol or water; replace if necessary. Make sure the feed motor is connected and functioning. The motor winding resistance is 36 ohms ±2 ohms for the following pins: 1-4, 1-6, 2-3, and 2-5. No pin should have continuity to the motor case and no pin should have a short to any other pin. Multiple feeds: This is often due to environmental factors or the customer's choice of papers. Make sure the paper is undamaged and that the corner bucklers are in good condition and free to move up and down with the paper stack. Tray does not raise/lower properly: Elevator motion can be tested by opening and closing the door, with or without the printer installed. 2-29

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2-29
4049-XXX
Paper Feed Problem, High Capacity Feeder
The paper feed rollers should be replaced every 200,000 prints or
whenever feeding becomes unreliable. Clean rollers with alcohol or
water at every service call.
The feeder receives a pick signal from the printer, and will not do a
test feed without the printer installed. Paper can be manually picked
by rotating the paper feed rollers by hand, or by removing the upper
paper feed motor screw, pivoting the motor downward, and rotating
the gear.
For all paper feed problems:
Verify that the printer designator
switch on the rear of the high capacity feeder is set to the correct
printer model being used. Make sure the paper is undamaged, shin-
gled correctly, properly installed in the tray, and is the correct weight
(16 to 24 lb.) and size (letter or A4). Letter paper size and A4 paper
size model feeders are available. Paper sizes are not interchange-
able between the two models. Make sure that all paper in the tray is
the same type and has not been run through the printer before.
Envelopes and transparencies are not supported in the high capac-
ity feeder.
Jams:
Make sure the printer is installed correctly on the feeder.
Check for obstructions in the printer throat. Make sure the paper in
the tray does not have excessive curl. Look between the printer and
feeder to make sure the paper is entering the printer correctly.
Failure to feed:
Check the printer Paper Source menu for a “Tray 2”
indication to be sure the printer detects the high capacity feeder.
Check the condition of the feed rollers and clean with alcohol or
water; replace if necessary. Make sure the feed motor is connected
and functioning. The motor winding resistance is 36 ohms ±2 ohms
for the following pins: 1-4, 1-6, 2-3, and 2-5. No pin should have con-
tinuity to the motor case and no pin should have a short to any other
pin.
Multiple feeds:
This is often due to environmental factors or the
customer's choice of papers. Make sure the paper is undamaged
and that the corner bucklers are in good condition and free to move
up and down with the paper stack.
Tray does not raise/lower properly:
Elevator motion can be tested
by opening and closing the door, with or without the printer installed.