Konica Minolta magicolor 7450, Service Manual

Page: 238 / 346

Field Service Ver. 1.0 May 2006 14. Service call message
201
magicolor 7450
T
roubleshooting
14.3.40 0F37: Abnormally high toner density detected Black TCR Sensor
14.3.41 0F3A: Cyan TCR Sensor adjustment failure
14.3.42 0F3B: Magenta TCR Sensor adjustment failure
14.3.43 0F3C: Yellow TCR Sensor adjustment failure
Relevant Electrical Parts
Imaging Unit /K Mechanical Control Board (PWB-M)
Controller Board (PWB-P)
Step Action
WIRING DIAGRAM
Control Signal
Location (Electri-
cal Component)
1
Correct the TCR connection on the
underside of the Imaging Unit if faulty.
— —
2 Reinstall Imaging Unit — —
3 Change Imaging Unit — —
4 Change PWB-M — —
5 Change PWB-P — —
Relevant Electrical Parts
Imaging Unit /C
Imaging Unit /M
Imaging Unit /Y
Toner Supply Motor Y/M (M6)
Toner Supply Motor C/K (M7) Mechanical Control Board (PWB-M)
Controller Board (PWB-P)
Step Action
WIRING DIAGRAM
Control Signal
Location (Electri-
cal Component)
1
Clean the TCR Sensor window on the
underside of the Imaging Unit if dirty
— —
2
M6, M7 operation check PWB-M CNDM2-10 to 13 (M6)
PWB-M CNDM3-10 to 13 (M7) C-22
C-23
3 Reinstall Imaging Unit — —
4 Change Imaging Unit — —
5 Change PWB-M — —
6 Change PWB-P — —