Xerox Phaser 6120 Service Manual page 243

6.
Similarly, the Toner Cartridge Rack is rotated and development of C is carried out.
7.
Similarly, the Toner Cartridge Rack is rotated and development of K is carried out.
8.
When the development of K is completed, the Toner Cartridge Rack is rotated and brought
to a stop at the standby position.
Toner Cartridge Rack Stop Position Detection
The Toner Cartridge Rack stop position for each color of toner is detected by the Rack
Motor (M2) and the Rack Positioning Sensor (PC3).
The Toner Cartridge Rack is provided with slits, each for a specific color of toner. When
the rack rotates, the Rack Positioning Sensor (PC3) is blocked and unblocked.
A specific stop position is detected when the Rack Positioning Sensor (PC3) is blocked
and unblocked.
.
Rack Positioning Sensor
Toner Cartridge Rack Standby Position
The standby position is 45 ° before the developing position of the K Toner Cartridge. The
Y Toner Cartridge is therefore provided with a slit for detecting the K developing position.
When the Toner Cartridge Rack is rotated, the Rack Positioning Sensor (PC3) moves past
the slit for detecting the K developing position. This allows the machine to determine that
the current development is for K. Through pulse control of the Rack Motor, the machine
then successfully brings the Toner Cartridge Rack to its standby position
.
Direction of Rotation of
the Toner Cartridge Rack
Rack Positioning
Sensor
Standby Position Detecting Position
K C
Detection of C Detection of M
Developing Developing
Position Position
Phaser® 6120 Color Laser Printer Service Manual
Slits
4139to2072e0
C
M K
Y
M Y
Detection of Y Detection of K
Developing Developing
Position Position
7-23
Print Engine Theory of Operation
4139to1583c0
Toner Cartridge
Rack Standby
Position
4139to2073e0