Lexmark 2390 003 - B/W Dot-matrix Printer Service Manual page 52

FRU / Symptom
3 Paper Selector
Lever
4 Operator Panel
5 Paper Feed Motor
2-28
Action
Make sure the selector lever alternately
engages and disengages the tractor gear and
the ASF drive gear.
Check the operation of the following parts as
you move the paper select lever:
• The tractor gear engages correctly in the
continuous forms position.
• The tractor belts are in good condition and
rotate correctly.
• The pinch roller shafts move downward as
the lever moves to the cut sheet position.
• The paper separator moves upward as
the lever moves to the cut sheet position.
If paper does not move at all, verify that the
Form Feed button is working as follows:
With the tractor in the push position, power off,
power on, then press Alt/Load. The carrier
should move to the center of the platen. If it
does not, go to the
Check" on page 2-24.
Disconnect the paper feed motor cable CN10
from the main logic board. No pin should have
continuity to ground. The resistances should
be as follows:
23XX-001, 002 = 21 to 24 ohms.
CP10-1 to CP10-5
CP10-2 to CP10-5
CP10-3 to CP10-5
CP10-4 to CP10-5
23XX-003 = 8 to 9 ohms.
CP10-1 to CP10-5
CP10-2 to CP10-5
CP10-3 to CP10-5
CP10-4 to CP10-5
"Operator Panel Service
CP10-1 to CP10-6
CP10-2 to CP10-6
CP10-3 to CP10-6
CP10-4 to CP10-6