17. Malfunction code
Field Service Ver. 1.0 Jun. 2008
302
T
roubleshooting
17.5.12
C2552: Abnormally high toner density detected cyan TCR sensor
17.5.13
C2554: Abnormally high toner density detected magenta TCR sensor
17.5.14
C2556: Abnormally high toner density detected yellow TCR sensor
17.5.15
C2557: Abnormally low toner density detected black TCR sensor
Relevant parts
Imaging unit /C
Imaging unit /M
Imaging unit /Y
Toner cartridge /C
Toner cartridge /M
Toner cartridge /Y
Printer control board (PRCB)
Step
Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1
Reinstall imaging unit
—
—
2
Reinstall toner cartridge
—
—
3
Change imaging unit
—
—
4
Change PRCB
—
—
Relevant parts
Imaging unit /K
Toner cartridge /K
Toner supply motor/CK (M7)
Printer control board (PRCB)
Step
Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1
M7 operation check
(At this time, IU must be non-installation.)
PRCB CN30-1 to 4
C to D-24
2
Reinstall imaging unit
—
—
3
Reinstall toner cartridge
—
—
4
Change imaging unit /K
—
—
5
Change PRCB.
—
—
d-Color MF201
Service Manual Y109660-1