Lexmark P122 Photo Jetprinter, Руководство по обслуживанию

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Diagnostic Information
2-9
4102-P01
2 Paper Feed Motor
Engine Frame
Assembly
System Board A noisy or chattering motor or a motor that fails to
turn, can be caused by:
• An open or short in the motor
• An open or short in the motor driver on the
system board
• A bind in the paper feed mechanism
Check for motor pins shorted to the motor
housing. If you find a shorted pin, replace the
engine frame assembly.
With the paper feed motor cable disconnected
from the system board, check for approximately
8.4 ohms between pin 3 and 4 on the motor cable.
If correct, plug in the printer and check the voltage
reading of approxi17 V dc pulse on pin
J3F-4 as the paper feed motor is running. If the
voltage reading is incorrect, replace the system
board.
Although the paper feeds in a forward direction
only, the paper feed motor turns in two directions.
If the paper feed motor turns in one direction only,
replace the system board.
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 loose or worn motor gear.
3 Gears Check for binds in the gear train and paper feed
mechanism by rotating the large feed roll by hand.
If you notice a bind, isolate it by removing one of
the small idler gears on the inside of the left side
frame. If any worn or binding gears or rollers are
found, replace the engine frame assembly.
4 Paper Path Perform the “Paper Path Service Check” on
page 2-10 , starting at Step 1.
Parts / FRUs Action
Service.bk Page 9 Tuesday, February 13, 2001 2:40 PM