Lexmark 4039-1XX Manuale Utente

Service Manual

If paper feeds but stops undamaged in the paper path there may be 
a sensor problem. Run the diagnostic test for the input and exit 
sensors replace as necessary. Check the continuity of the cable 
before replacing the sensor. The input sensor signal is on (10P) 
J20-6 (10R/12R/12C/12L) J20-11 (16L) J17-11; the output sensor 
signal is on (10P/10R/12R/12C/12L) J19-8 (16L) J16-8. The voltage 
should be 0VDC when there is no paper in the sensor and +5VDC 
when paper is present.

If paper is jamming, clean the paper path of obstructions or repair 
any damaged parts. Very thin or thick paper, labels, transparencies, 
or card stock will have a higher jam rate than regular xerographic 
paper. Check the condition of the paper in the tray and verify that the 
tray is installed correctly.

If paper is curling badly enough to cause a problem feeding or 
stacking, 

see

 

.

Check that all gears and belts are working correctly both in the 
duplex unit and on the tray top cover, and that the gear on the tray 
top cover engages the gear on the duplexer.

If paper is jamming in the table cover area, make sure the table 
cover is properly installed. Run diagnostics Duplex Test 1 to make 
sure the paper is feeding far enough into the duplex unit before 
reversing. Examine the condition of all rollers.

If paper is stopping or jamming as it is fed back across the top of the 
paper tray, run diagnostics Duplex Test 2 to make sure there is no 
slippage in the paper path. Make sure the paper tray top cover is not 
damaged. Cold paper curl can also cause jams here; 

see

If paper is jamming at the front exit, verify that the front exit deflector 
switch is functioning by disconnecting (10P/10R/12R/12C/12L) J19 
(16L) J16 and checking the resistance from pin 1 to pin 2 as you 
operate the switch.

Also 

see

 “23 Paper Jams” on