Toshiba e-STUDIO 4500c, Service Manual

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Machine Configuration August, 2006
Spec-24
No. Component Function
QUENCHING LAMPS
QL1 Quenching Lamp - K Eliminates electrical charge and neutralizes the surface of
the drum in the Black PCU.
QL2 Quenching Lamp - C Eliminates electrical charge and neutralizes the surface of
the drum in the Cyan PCU.
QL3 Quenching Lamp - M Eliminates electrical charge and neutralizes the surface of
the drum in the Magenta PCU.
QL4 Quenching Lamp - Y Eliminates electrical charge and neutralizes the surface of
the drum in the Yellow PCU.
No. Component Function
SENSORS
S1 ID Sensor - Black Reads 1) light reflected from the bare surface of the
ITB, and 2) reads light reflected from the black ID
sensor patterns on the ITB.
S2 ID Sensor - Color Reads 1) light reflected from the bare surface of the
ITB, and 2) reads light reflected from the color ID
sensor patterns on the ITB. This sensor has one
additional receptor to collect diffuse light reflected
from color toner to improve calculation of the toner
density.
S3 ITB Lift Sensor
This sensor switches the ITB lift motor off when the
ITB comes into contact the drums of the four PCUs.
S4 MUSIC Sensor - Center Reads the center MUSIC pattern. This feedback is
used to control the MUSIC process to correct color
registration errors.
S5 MUSIC Sensor - Front Reads the front MUSIC pattern. This feedback is
used to control the MUSIC process to correct color
registration errors.
S6 MUSIC Sensor - Rear Reads the Rear MUSIC pattern. This feedback is
used to control the MUSIC process to correct color
registration errors.
S7 Paper Feed Sensor - Tray 2 Detects the leading edge of each sheet of paper
from the pick–up roller of tray (middle tray) and
switches off the pick–up roller solenoid so the pick–
up roller lifts.
S8
Vertical Transport Sensor -
Tray 2 Detects the leading edge and trailing edge of each
sheet fed from tray 2 and signals a jam if the edges
do not pass at the prescribed time.
S9 Paper End Sensor - Tray 2 Receives light reflected from the paper until the last
sheet is fed from tray 2 (middle tray), then signals
paper end.
S10 Lift Sensor - Tray 2
Detects when the pick up roller (pushed up by the
top of the paper stack in the right side of the
tandem tray) has reached the correct height for
paper feed and then switches off the tray 2 (middle
tray) lift motor.
S11 Paper Feed Sensor - Tray 3 Detects the leading edge of each sheet of paper
from the pick–up roller of tray 3 (bottom tray) and
switches off the pick–up roller solenoid so the pick–
up roller lifts.