Konica Minolta bizhub PRO 1050 Service Manual page 607

14. MALFUNCTION CODE
Classification Code
Toner SC23-22 Toner pump motor (M28) abnor-
convey-
ance
abnor-
mality
SC23-24 Air pump motor (M29) abnormal-
SC23-25 Air pump motor (M29) abnormal-
SC23-26 Air pump motor (M29) abnormal-
572
Causes
mality. The rotation of the toner
pump motor (M28) is checked.
While M28 is rotating, an error
detection signal (abnormal rota-
tion) is detected for more than 1
second. At this time, error signals
(blowout of a fuse and 24V cut off)
are not detected.
ity. The rotation of the air pump
motor (M29) and the 24V power
source are checked.
While M29 is rotating, an error
detection signal (abnormal rota-
tion) is detected for more than 1
second. At this time, an error sig-
nal (24V cut off) is detected.
ity. The blowout of a fuse for the
air pump motor (M29) in the
printer control board (PRCB) is
checked.
While M29 is rotating, an error
detection signal (abnormal rota-
tion) is detected for more than 1
second. At this time, an abnormal-
ity signal (blowout of a fuse) is
detected, but no abnormality sig-
nal (24V cut off) is detected.
ity. The rotation of the air pump
motor (M29) is checked for more
than 1 second. An error detection
signal (abnormal rotation) is
detected for more than 1 second.
At this time, error signals (blowout
of a fuse and 24V cut off) are not
detected.
Field Service Ver3.0 Nov.2006
Resulting Estimated abnormal parts
operation
The main body Toner pump motor (M28)
stops immediately Pump encoder sensor /1
to turn OFF the (PS28)
RL1 (main).
DC power supply /2 (DCPS/
2)
Air pump motor (M29)
Printer control board (PRCB)
Air pump motor (M29)
Air pump motor (M29)
Pump encoder sensor
(PS29)
Load of the pump