Lexmark 7003-050 X340n, Service Manual

Page: 51 / 162

2-30
Service Manual
7003-XXX
Paper occasionally picks or picks multiple sheets at once
Paper “trees,” wrinkles, stacks poorly or curls
A4, oversized paperfeed service check
FRU Action
Tray 1
Tray 2 (option) Check tray for paper catch points.
If the sheet being fed stops momentarily, the ACM applies
additional vertical force causing additional sheets to feed.
Do not mix paper types.
Paper pick tires Check the tires in the ACM assembly for signs of wear or
damage.
Replace the tires as necessary.
ACM clutch complete bill of material (CBM)
Manual feed clutch CBM Open the left cover, and observe the solenoid and clutch
actions at the ACM and manual feed shafts as a print job is
attempted.
Replace the faulty part.
Controller card Disconnect the solenoid cable at J101 on the controller
card.
Measure the resistance across cable pins 1 and 2 and then
pins 3 and 4.
• The resistance should be 180–210 ohms.
• If it is not, call the next level of service.
• If the resistance is 180–210 ohms, check the controller
card. See “Controller card service check” on
page 2-21 for more information.
Replace controller card as necessary.
FRU Action
Fuser This problem is most likely due to a worn backup roll. It causes the
MFP to run hotter than required for the media being printed.
Excessive heat can cause paper treeing problems, poor stacking, or
curl.
Symptom Action
200.20 and 241.18 paper jams
when using A4 paper. Verify that the Size/Type item in the Paper Setup menu is set to A4.
Verify A4 is chosen as the paper size in the printer driver. Both of
these items need to be set to A4 when printing A4 paper.
Note: These jams can also occur if the Size/Type setting and drivers
are set to letter, and the paper length exceeds the letter paper length
by 1/2 inch.