Xerox Phaser 6120

Print Engine Theory of Operation
Phaser® 6120 Color Laser Printer Service Manual
7-39
■ To prevent false detection, the Imaging Unit is provided with the Toner Agitating Screw
that ensures that the waste toner is evenly stored.
.
Waste Toner Near Full Condition Detection Control
■ Light emitted from the LED mounted on the Waste Toner Near Full Detection Board
(PWB-C) is made to travel through the light guide. This light is blocked if the waste toner
reaches an upper limit, which allows the machine to determine that there is a waste toner
near full condition.
■ To prevent false detection, the Imaging Unit is provided with the Toner Agitating Screw
that ensures that the waste toner is evenly stored.
Waste Toner Full Detection Control
■ The machine determines that there is a waste toner full condition when 200 images* are
reached after a waste toner near full condition has been detected. (* The initiation of any
new print cycle is prohibited when 50 full-color printed pages are produced after the waste
toner near full condition has been detected.)
■ When light of the LED on the Waste Toner Near Full Detection Board (PWB-C) is
unblocked after the Imaging Unit has been replaced, the waste toner full condition is reset.
Waste Toner Near Full
Detection Board (PWB-C)
Light Guide
Waste Toner Detection Area
4139to2086e0
Normal Condition
LED
Waste TonerLED LightLight Guide
At Waste Toner Near Full Condition
4139to2087e0