Lexmark 7300 Series, Service Manual

Page: 36 / 88

4418-X6X
2-16
Service Manual
Paper feed service check
If the All-In-One does not have paper jam problems, continue with this
service check. If the All-In-One has paper jam problems, examine the printer
for the following before you begin the service check:
•
Check the entire paper path for obstructions.
•
Ensure there is not too much paper in the paper tray.
•
Ensure the correct type of paper is being used.
•
Check for static in the paper.
Unit/Problem Action
• Paper Feed
Motor
• System Board
Run the “Power-On Self Test (POST) sequence” on
page 2-1 .
A noisy or chattering motor or a motor that fails to turn
can be caused by:
• A broken circuit or short-circuit in the motor
• A bind in the paper feed mechanism
Disconnect paper feed motor cable J11 from the
system board, and check for approximately 25 ohms
between the two wires on the paper feed motor. If the
reading is incorrect, replace the print engine. Go to
“Print engine removal” on page 4-17 . If the reading
is correct, check for approximately 30 V dc at
connector J11 on pins 1 and 2. If the voltage is
incorrect, replace the system board. Go to
“System
board removal” on page 4-14 .
Although the paper feeds in one direction, the paper
feed motor turns in two directions. If the paper feed
motor turns in one direction only, replace the system
board. Go to
“System board removal” on page 4-14 .
Binds in the paper feed motor or gear train can cause
intermittent false paper jam errors. Remove the paper
feed motor, and check the shaft for binds. Also check
for a loose or worn motor gear. If the gear is defective,
replace the print engine. Go to
“Print engine
removal” on page 4-17 .