Konica Minolta bizhub PRO 1050 Service Manual page 647

14. MALFUNCTION CODE
Classification Code
Fan SC52-08 The blowout of a fuse for the cool-
abnor-
mality
SC52-09 Rotation of the cooling fan /3
SC52-10 The EM signal of the cooling fan /1
SC52-11 The EM signal of the cooling fan /2
SC52-12 The EM signal of the cooling fan /3
Power SC53-01 A speed error signal of the fusing
abnor-
mality
612
Causes
ing fan /3 (FM3) in the AC drive
board (ACDB) is checked. An
abnormal condition occurs with
the FM3 EM signal a specified
period of time after FM3 turns ON.
This abnormal condition recurs
even a specified period of time
after FM3 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.
(FM3) is checked. An abnormal
condition occurs with the FM3 EM
signal a specified period of time
after FM3 turns ON. This abnor-
mal condition recurs even a speci-
fied period of time after FM3 is
turned OFF and then turned ON,
and an error detection signal (24V
cut off/blowout of a fuse) is not
detected.
(FM1) is ON when the print is
started.
(FM2) is ON when the print is
started.
(FM3) is ON when the print is
started.
motor (M1) is checked. An error
detection signal is detected twice
in succession a specified period of
time after M1 turns ON. (The first
signal is ignored.)
Field Service Ver3.0 Nov.2006
Resulting Estimated abnormal parts
operation
The main body AC drive board (ACDB)
stops immediately Cooling fan /3 (FM3)
to turn OFF the Printer control board (PRCB)
RL1 (main).
AC drive board (ACDB)
Cooling fan /3 (FM3)
Printer control board (PRCB)
Error code is not Cooling fan /1 (FM1)
displayed on the
operation panel,
but displayed only
Cooling fan /2 (FM2)
on the data collec-
tion, the list output
and the CSRC.
Cooling fan /3 (FM3)
The control of the
main body is
made by using a
data previously
obtained.
The main body Fusing motor (M1)
stops immediately
to turn OFF the
RL1 (main).