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2K5
Maintenance
item No.
Checking sensors for toner
U155
Description
Displays the on-off status of each sensor or switch related to toner.
Purpose
To check if the sensors and switches operate correctly.
Method
1. Press the start key.
2. Turn each switch on and off manually to check the status.
When the on-status of a switch is detected, that switch is displayed in reverse.
Display
DEVELOPER SENSOR
CONTAINER SET
CONTAINER SENSOR
DISPOSAL TANK SENSOR
MOTOR
3. To stop motor driving, press [MOTOR ON] again.
Completion
Press the stop key. The screen for selecting a maintenance item No. is displayed.
Checking the developing drive time
U157
Description
Displays the developing drive time for checking, which is used as a reference when correcting the toner con-
trol.
Purpose
To check the developing drive time after replacing the developing unit.
Method
1. Press the start key. The developing drive time is displayed in minutes.
Completion
Press the stop key. The screen for selecting a maintenance item No. is displayed.
Checking the developing count
U158
Description
Displays the developing count for checking.
Purpose
To check the developing count after replacing the developing unit.
Method
1. Press the start key. The developing counter count is displayed.
Completion
Press the stop key. The screen for selecting a maintenance item No. is displayed.
1-3-50
Description
Switches and sensors
Toner sensor (TNS)
Toner container detection switch (TCDSW)
Toner container sensor (TCS)
Overflow sensor (OFS)
The toner feed clutch (TFCL) and the paper feed motor (PFM)
are turned on.
Service Manual
Y112040-6
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