Lexmark Medley 4012-005, Руководство по обслуживанию

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4012-0XX
19
Scanner Document Feed Service Check
Before beginning service, examine the following:
•
Are the pages damaged or dog-eared, are pages stuck together?
•
Is the paper being fed too thin (less than 16 lb paper), or too thick
(greater than 24 lb paper)?
•
Are the pages too small to feed properly?
•
Too many pages being fed (greater than 20)?
•
Are the scanner entry guides set properly?
•
Are both sides of the scanner front frame latched?
The scanner document feeder can be checked using the “Scanner
Feed Test” on page 25 .
FRU Action
1 Feed Rollers & Restraint Pad Check for dirty, worn, or damaged rollers.
Make sure the restraint pad and its spring
are in good condition. Make sure the pick
springs and all roller springs are undam-
aged. Refer to
“Scanner Cleaning Proce-
dure” on page 55 .
2 Paper Sensors The operator panel message should
change when a document is fed into the
scanner. Check for fax board J6-3 to
change from 0 V dc to +5 V dc as the entry
sensor flag is toggled. Check for fax board
J6-6 to change from 0 V dc to +5 V dc as
the second sensor flag is toggled.
3 Motor Fax board J3-5 and J3-6 should have
+15 V dc.
Warning: Disconnecting scanner motor
while the machine is plugged in can dam-
age the fax board. Voltage is present on
the board even with the power switch off.
Unplug the machine before proceeding.
Disconnect the motor from the fax board.
Motor pins 1 through 4 should not have
continuity to each other or to ground.
4 Gear Train Inspect the gear teeth for damage. Rotate
the gear train to check for binds.
5 Fax Board or Connections Check scanner motor (J3) and paper sen-
sor (J6) cable connections to fax board.