Toshiba e-STUDIO 5540C Service Manual page 132

9. High-voltage transformer (HVT)
A circuit generates the output control voltage Vc of the main charger bias, main charger grid bias,
1st transfer roller bias, 2nd transfer roller bias, and developer bias.
10.Drum motor-K
This motor drives the K drum.
The drive of the motor is transmitted with the gear from the drum motor to the K drum.
To align the phases of the K drum and color drums and enhance the color registration accuracy, the
signal change of the color drum phase sensor and the K drum phase sensor works as a trigger to
stop the motor.
For further color registration accuracy, the gears are precisely assembled.
11. Drum motor-YMC
These motors drive the Y, M and C drums.
The drive of the motor is transmitted with the gear from the drum motor to the M (C) drum and then
to the Y drum.
To align the phases of the K drum and color drums and enhance the color registration accuracy, the
signal change of the color drum phase sensor and the K drum phase sensor works as a trigger to
stop the motor.
For further color registration accuracy, the gears are precisely assembled.
12.Developer unit motor-K
This motor drives the auger to carry waste toner gathered with the K developer magnetic roller and
K cleaning blade to the waste toner transport path.
To maintain the rotational speeds of the photoconductive drum and the developer magnetic roller at
a specified ratio, the developer unit motor rotates at a speed proportionate to the paper transport
speed for special modes such as the thick paper mode.
The drive of the motor is transmitted with the gear, and the motor is connected to the developer unit
with a coupling.
13.Developer unit mixer motor-K
This motor drives a mixer to mix and transport K developer material.
The rotational speed of this motor is constant in any mode because the transport amount of the
developer material must be stable in any special mode such as the thick paper mode.
The drive of the motor is transmitted with the gear, and the motor is connected to the developer unit
with a coupling.
14.Developer unit motor-YMC
These motors drive the auger to carry waste toner gathered with the YMC developer magnetic
rollers and YMC cleaning blades to the waste toner transport path.
To maintain the rotational speeds of the photoconductive drum and the developer magnetic roller at
a specified ratio, the developer unit motor rotates at a speed proportionate to the paper transport
speed for special modes such as the thick paper mode.
The drive of the motor is transmitted with the gear, and the motor is connected to the developer unit
with a coupling.
15.Developer unit mixer motor-YMC
These motors drive a mixer to mix and transport YMC developer materials.
The rotational speed of these motors is constant in any mode because the transport amount of the
developer material must be stable in any special mode such as the thick paper mode.
The drive of the motor is transmitted with the gear, and the motor is connected to the developer unit
with a coupling.
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
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