Konica Minolta bizhub C658 Service Manual page 1817

bizhub C658/C558/C458/C368/C308/C258
[2]
[3]
[1] Toner cartridge
[3] Toner replenishing pipe
6.4.2 Toner replenishing from toner bottle to toner hopper
(1) Toner replenishing mechanism
• The toner replenishing from the toner cartridge to the toner hopper is determined by unblocking and blocking the toner empty sensor.
• If the toner empty sensor is blocked a predetermined number of times, the machine determines that it is in a near empty condition. So
that, the toner cartridge motor is energized and a toner replenishing sequence is started.
• The toner hopper for each color of toner is provided with a toner empty sensor.
• Each toner empty sensor is blocked or unblocked by an actuator dedicated to it. The detection plate is moved up and down by a cam that
is mounted coaxially with the toner agitating blade. The actuator that is mounted on the detection plate is operatively associated with the
up-and-down movement that is detected using the toner empty sensor.
[1]
[7]
[6]
[5]
[1] Toner hopper
[3] Toner empty sensor/K (PS31)
[5] Actuator
[7] Toner empty sensor/Y (PS34)
(2) Toner replenishing control
• The toner replenishing control is started when the drive of the toner cartridge motor is started.
• The output of the toner empty sensor is monitored for a predetermined period of time. If the toner empty sensor is turned ON from the
OFF state, during the predetermined period of time, the machine determines that the "toner hopper runs out of toner (or there is only a
small amount of toner left in the toner hopper)" and increments the near empty counter by one. Next, the toner cartridge motor is rotated
for a predetermined period of time, so that toner is supplied from the toner cartridge to the toner hopper.
• If the toner empty sensor remains OFF, the machine determines that "toner is still available for use in the toner hopper", resetting the
near empty counter to zero.
• These operations are repeated. When the near empty counter reaches the predetermined value, the machine determines that the toner
hopper is in the near empty condition.
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 6. TONER
[1]
[2]
[4]
[3]
[2] Toner hopper
- -
[2] Detection plate
[4] Toner empty sensor/C (PS32)
[6] Toner empty sensor/M (PS33)
- -
O-42
SUPPLY SECTION