20. Malfunction code
20.5.20
C2558: Abnormally high toner density detected black TCR sensor
Imaging unit /K
Toner cartridge /K
Step
1
Reinstall imaging unit
2
Reinstall toner cartridge
3
Change imaging unit /K
4
Change PRCB
20.5.21
C2559: Cyan TCR sensor adjustment failure
20.5.22
C255A: Magenta TCR sensor adjustment failure
20.5.23
C255B: Yellow TCR sensor adjustment failure
Imaging unit /C
Imaging unit /M
Imaging unit /Y
Step
1
Reinstall imaging unit
2
Change imaging unit
3
Change PRCB
20.5.24
C255C: Black TCR sensor adjustment failure
Imaging unit /K
Step
1
Reinstall imaging unit /K
2
Change imaging unit /K
3
Change PRCB
438
Relevant parts
Action
Relevant parts
Action
Relevant parts
Action
Field Service Ver. 1.0 Oct. 2007
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
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—
—
—
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
—
—
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
—
—
Location (Electri-
cal component)
—
—
—
—
Location (Electri-
cal component)
—
—
—
Location (Electri-
cal component)
—
—
—