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Field Service Ver. 2.0 Jul. 2009
19. TROUBLE CODE
727
TROUBLESHOOTING
C2354 Rear side cooling fan
motor’s failure to turn
• The motor lock signal remains HIGH for a
predetermined continuous period of time
while the motor is turning.
B
C2551 Abnormally low toner
density detected cyan
TCR sensor
• When sampling data is determined in TC
ratio calculation control, TCR sensor output
is higher than a predetermined value for a
predetermined number of times in a row
even though there is toner in the sub hop-
per.
B
C2552 Abnormally high toner
density detected cyan
TCR sensor
• TC ratio in the developing unit which is
determined by Toner replenishing amount
control mechanism, is a predetermined
value or more for a given number of times
consecutively.
B
C2553 Abnormally low toner
density detected magenta
TCR sensor
• When sampling data is determined in TC
ratio calculation control, TCR sensor output
is higher than a predetermined value for a
predetermined number of times in a row
even though there is toner in the sub hop-
per.
B
C2554 Abnormally high toner
density detected magenta
TCR sensor
• TC ratio in the developing unit, which is
determined by toner replenishing amount
control mechanism, is a predetermined
value or more for a given number of times
consecutively.
B
C2555 Abnormally low toner
density detected yellow
TCR sensor
• When sampling data is determined in TC
ratio calculation control, TCR sensor output
is higher than a predetermined value for a
predetermined number of times in a row
even though there is toner in the sub hop-
per.
B
C2556 Abnormally high toner
density detected yellow
TCR sensor
• TC ratio in the developing unit, which is
determined by toner replenishing amount
control mechanism, is a predetermined
value or more for a given number of times
consecutively.
B
C2557 Abnormally low toner
density detected black
TCR sensor
• When sampling data is determined in TC
ratio calculation control, TCR sensor output
is higher than a predetermined value for a
predetermined number of times in a row
even though there is toner in the sub hop-
per.
B
C2558 Abnormally high toner
density detected black
TCR sensor
• TC ratio in the developing unit, which is
determined by toner replenishing amount
control mechanism, is a predetermined
value or more for a given number of times
consecutively.
B
Code
Item
Detection timing
Trouble iso-
lation
Rank
Y110571-1 Service Manual
Содержание d-color MF651
Страница 1: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Страница 24: ...MEASURES TO TAKE IN CASE OF AN ACCIDENT S 22 Blank Page...
Страница 27: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Страница 511: ...Field Service Ver 2 0 Jul 2009 10 UTILITY 451 ADJUSTMENT SETTING Blank Page Y110571 1 Service Manual...
Страница 716: ...16 MECHANICAL ADJUSTMENT Field Service Ver 2 0 Jul 2009 656 ADJUSTMENT SETTING Blank Page Service Manual Y110571 1...
Страница 1053: ...UPDATING STATUS DATE UPDATED PAGES PAGES CODE 10 2009 1ST EDITION 1053053 Y110571 1...