Filter
Top Products
2-112 Service Manual
Paper feed service check
If you have a 936 Transport Motor Error go to “Main drive service check” on page 2-105.
Autocompensator fails to feed paper. Failures occur randomly throughout the stack
of paper
Paper feed failures occur only near the top of the stack of paper
The most common cause of this problem is paper curl. Remove the paper from tray x and check for the natural
curvature in the paper. Reinstall the paper in the correct manner. If the problem persists, it may be necessary to
reduce the stack height. Replace both pick rolls if the paper appears to be flat in the tray but there is still a
problem.
Failures occur mainly near the bottom of the stack of paper
The autocompensator pick arm may not be coming down far enough to allow the pick rolls to properly contact
the paper. Also the autocompensator motor may be failing. If this problem continues replace the
autocompensator assembly.
Double feeding paper
Note: If double feeding paper occurs mostly from the bottom of the stack, check for missing or damaged
restraint pads in the tray.
FRU Action
1 Alignment assembly Check to ensure the alignment assembly is correctly attached to the
left side frame and the mounting screws are tight. Check the
alignment assembly for worn rollers, contaminated rollers, or binds.
Replace the alignment assembly if any problem is found.
2
Inner deflector Check the inner paper deflector for correct installation. If the deflector
is bowed or not fitting correctly, replace the deflector.
FRU Action
1 Pass thru sensor Check the pass thru sensor for correct installation and operation.
2
Autocompensator
assembly
The autocompensator pick roll shaft assembly is not providing
enough torque if the pick rollers are not picking the paper correctly.
Replace the autocompensator assembly.
3
Wear strips in tray x
problem is found.
Check the wear strips for excessive wear, scratches, or rough spots.
Replace the wear strips if a problem is found.
FRU Action
1 Paper Paper is usually the primary cause of a double feeding paper
problem. Flex the paper before placing the paper in the tray. Edge-
welded paper is the most common cause of double feeding. Loading
the paper in the tray in different locations and directions and using
rough paper and short grain paper also causes double feeding.
2
Autocompensator Make sure the counterbalance spring is not missing, loose, or broken
at the top of the autocompensator arm assembly. If you find a
problem, replace the autocompensator assembly.