Konica Minolta bizhub C360 Service Manual page 701

19. TROUBLE CODE
19.5.54 C2552: Abnormally high toner density detected cyan TCR sensor
19.5.55 C2554: Abnormally high toner density detected magenta TCR sensor
19.5.56 C2556: Abnormally high toner density detected yellow TCR sensor
19.5.57 C2558: Abnormally high toner density detected black TCR sensor
Developing unit/Y,M,C,K
Toner cartridge/Y,M,C,K
Step
1 Reinstall developing unit
2 Reinstall toner cartridge
3 Check the connector between developing
unit-FREYB CN4, CN6, CN8, CN10 for
proper connection and correct as neces-
sary.
4 Check the connector between FREYB
CN1, CN2-PRCB CN4, CN5 for proper
connection and correct as necessary.
5 Change developing unit
6 Change FREYB
7 PRCB ICP12 conduction check
8 Change PRCB
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Relevant parts
Action
Field Service Ver. 2.1 Feb. 2012
Front side relay board (FREYB)
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
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Location (Electri-
cal component)
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