Diagnostic Information 2-73
5055-01X
Face Down Stacker Full Service Check
High Capacity Feeder (HCF) Service Check
FRU Action
1 Stacker Full
Detection Lever
Check the stacker full detection lever for damage.
2 • Stacker Full
Detection
Sensor
• Printer
Controller
Board
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.
FRU Action
1 • Paper Size Sensors 1 & 2
• Residual Paper Sensors 1 - 4
• Paper Level Sensor
• Lower Limit Switch
• Docking Switch
• Upper Limit
• Paper Sensor Switch
• Paper Feed Sensor
Go to the “High Capacity
Paper Feed Sensor / Switch
Test” on page 1-64, and
perform the LED sensor test.
You can block each sensor to
verify if it is working properly.
Replace the failing sensor.
2 • Tray Motor
• Paper Feed Motor
• HCPF Power Supply
• Pickup Solenoid
• Paperfeed Roller
• Transfer Roller
• Paper Feed Clutch
• Tray Drive Belt
Be sure that all rollers, gears,
and belts are in good working
order. Replace as necessary.
3 • Paper Feed Clutch
• Pickup Solenoid
• HCF Power Supply
• Paper Feed Motor
• Tray Motor
• HCPF Board
Go to the “Maintenance
Mode” on page 1-62 and run
the tests.
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