Canon imagePRESS C1 P Service Manual page 723

Chapter 13
Replace the Bk developing assembly.
Is there any color whose
DENS-S value is -20 or less?
Are the values of DENS of Y, M
and C within 20?
Is the surface of the ATR sensor
(PS7) dirt?
Clean the surface of the
ATR sensor (PS7).
13-4
YES
Are the densities of Y, M and C
normal in visual check?
NO
NO
YES
YES
NO
YES
NO
NO
YES
Replace the developing assemblies of Y, M and C.
YES
NO
Is there any color whose DENS-S
value is -20 or less?
NO
F-13-4
C
YES
NO
YES