Konica Minolta bizhub PRO 920 Service Manual page 493

Field Service Ver2.0 Aug.2005
Classification Code
Tray 2 SC18-23#
Tray 3 SC18-30
SC18-31#
SC18-32#
SC18-33#
Causes
When the upper limit sensor /2
(PS21) is OFF, PS21 does not
turn ON within a specified period
of time after the paper lift motor /
2 (M20) turns ON for lifting opera-
tion. And at this time, an error
detection signal is not detected.
The locking of the paper lift motor
/3 (M21) is detected.
When M21 is ON, an error detec-
tion signal of the M21 is detected.
When the upper limit sensor /3
(PS22) is OFF, PS22 does not
turn ON within a specified period
of time after the paper lift motor /
3 (M21) turns ON for lifting opera-
tion. And at this time, an error
detection signal (24V cut off) is
detected.
When the upper limit sensor /3
(PS22) is OFF, PS22 does not
turn ON within a specified period
of time after the paper lift motor /
3 (M21) turns ON for lifting opera-
tion. And at this time, an error
detection signal (blowout of ICP)
is detected.
When the upper limit sensor /3
(PS22) is OFF, PS22 does not
turn ON within a specified period
of time after the paper lift motor /
3 (M21) turns ON for lifting opera-
tion. And at this time, an error
detection signal is not detected.
13. MALFUNCTION CODE
Resulting Estimated abnormal parts
operation
Error code is not Paper lift motor /2 (M20)
displayed on the Printer control board
operation panel, (PRCB)
but displayed Upper limit sensor /2 (PS21)
only on the data DC power supply /2
collection, the (DCPS2)
list output and Loose connection
CSRC. Since Tray rear end restriction
the lifting opera- plate misaligned
tion of the tray is Paper improperly loaded
not completed, Tray 2
"Set paper in the
tray 2" is dis-
played on the
operation panel.
The main body Paper lift motor /3 (M21)
stops immedi- Printer control board
ately to turn OFF (PRCB)
the main relay Upper limit sensor /3 (PS22)
(RL1). Loose connection
Tray rear end restriction
Error code is not
plate misaligned
displayed on the
Paper improperly loaded
operation panel,
Tray 3
but displayed
only on the data
collection, the
list output and
CSRC. Since
the lifting opera-
tion of the tray is
not completed,
"Set paper in the
tray 3" is dis-
played on the
operation panel.
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