Konica Minolta bizhub PRO 1050 Service Manual page 636

Field Service Ver3.0 Nov.2006
Classification Code
Fan SC42-09 The blowout of a fuse for the suc-
abnor-
mality
SC42-10 The rotation of the suction fans /2
SC42-16 The rotation of the polygon cool-
Causes
tion fans /2 (FM7) and /3 (FM8) in
the AC drive board (ACDB) is
checked. An abnormal condition
occurs with the FM7/FM8 EM sig-
nal a specified period of time after
FM7/FM8 turns ON. This abnor-
mal condition recurs even a speci-
fied period of time after FM7/FM8
is turned OFF and then turned
ON, and an error detection signal
(blowout of a fuse) is detected. At
this time an error detection signal
(24V cut off) is not detected.
(FM7) and /3 (FM8) is checked. An
abnormal condition occurs with
the FM7/FM8 EM signal a speci-
fied period of time after FM7/FM8
turns ON. This abnormal condition
recurs even a specified period of
time after FM7/FM8 is turned OFF
and then turned ON, and an error
detection signal (24V cut off/blow-
out of a fuse) is not detected.
ing fan (FM18) is checked, and the
24V power source is also
checked. An abnormal condition
occurs with the FM18 EM signal a
specified period of time after
FM18 turns ON. This abnormal
condition recurs even a specified
period of time after FM18 is turned
OFF and then turned ON, and an
error detection signal (24V cut off)
is detected.
14. MALFUNCTION CODE
Resulting Estimated abnormal parts
operation
The main body AC drive board (ACDB)
stops immediately Suction fan /2 (FM7)
to turn OFF the Suction fan /3 (FM8)
RL1 (main).
DC power supply /2 (DCPS/
2)
601