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5055-xxx
Face down stacker full service check
FRU
1
Stacker full detection
lever
2
• Stacker full detection
sensor
• Printer controller
board
High-capacity feeder (HCF) service check
FRU
1
• Paper size sensors
1 and 2
• Residual paper
sensors 1–4
• Paper level sensor
• Lower limit switch
• Docking switch
• Upper limit
• Paper sensor switch
• Paper feed sensor
2
• Tray motor
• Paper feed motor
• HCPF power supply
• Pickup solenoid
• Paper feed roller
• Transfer roller
• Paper feed clutch
• Tray drive belt
3
• Paper feed clutch
• Pickup solenoid
• HCF power supply
• Paper feed motor
• Tray motor
• HCPF board
2-70
Service Manual
Check the stacker full detection lever for
damage.
Check for a voltage fluctuation between 0 V
and +5 V between pins 2 and 3 of connector
CN9 on the printer controller board while
actuating the sensor.
Go to the
"High-Capacity Paper Feed
Sensor / Switch Test" on page
perform the LED sensor test. You can block
each sensor to verify if it is working properly.
Replace the failing sensor.
Be sure that all rollers, gears, and belts are
in good working order. Replace as
necessary.
Go to the
"Maintenance Mode" on
page 3-60
and run the tests.
Action
Action
3-19, and
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