Konica Minolta bizhub C353 Service Manual page 535

16. Malfunction code
Code Item
C2551 Abnormally low toner
density detected cyan
TCR sensor
C2552 Abnormally high toner
density detected cyan
TCR sensor
C2553 Abnormally low toner
density detected magenta
TCR sensor
C2554 Abnormally high toner
density detected magenta
TCR sensor
C2555 Abnormally low toner
density detected yellow
TCR sensor
C2556 Abnormally high toner
density detected yellow
TCR sensor
C2557 Abnormally low toner
density detected black
TCR sensor
C2558 Abnormally high toner
density detected black
TCR sensor
C2559 Cyan TCR sensor
adjustment failure
C255A Magenta TCR sensor
adjustment failure
C255B Yellow TCR sensor
adjustment failure
C255C Black TCR sensor
adjustment failure
490
Detection timing
• TC ratio in the developing machine, which is
determined by toner replenishing amount
control mechanism, is 4 % or less for a
given number of times consecutively.
• TC ratio in the developing machine, which is
determined by Toner replenishing amount
control mechanism, is 11 % or more for a
given number of times consecutively.
• TC ratio in the developing machine, which is
determined by toner replenishing amount
control mechanism, is 4 % or less for a
given number of times consecutively.
• TC ratio in the developing machine, which is
determined by toner replenishing amount
control mechanism, is 11 % or more for a
given number of times consecutively.
• When the connector of the TCR sensor is
disconnected.
• TC ratio in the developing machine, which is
determined by toner replenishing amount
control mechanism, is 4 % or less for a
given number of times consecutively.
• When the connector of the TCR sensor is
disconnected.
• TC ratio in the developing machine, which is
determined by toner replenishing amount
control mechanism, is 11 % or more for a
given number of times consecutively.
• When the connector of the TCR sensor is
disconnected.
• TC ratio in the developing machine, which is
determined by toner replenishing amount
control mechanism, is 4 % or less for a
given number of times consecutively.
• TC ratio in the developing machine, which is
determined by toner replenishing amount
control mechanism, is 11 % or more for a
given number of times consecutively.
• When the connector of the TCR sensor is
disconnected.
• TCR sensor automatic adjustment does not
function properly, failing to adjust to an
appropriate value.
Field Service Ver. 3.0 Jan. 2008
Trouble iso-
lation com-
pliant unit
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Rank
B
B
B
B
B
B
B
B
B
B
B
B