Lexmark C78x - Page 477

Lexmark International, Inc. Revision 3.1 July 13, 2004
C77x, C78x Repeating Defect Locator
Rollers
Defect Period Component
Description
Component Planes
Effected
mm inches
Charge Roll One 38.2 1.5
PC Drum
One 93.8 3.69
PC Cleaner
One 96.8 3.8
Developer Roll One 46.3 1.82
TAR One 48.2 1.9
Toner Meter One 1092.2 43.0
Cart Auger
Cartridge
One 349.9 13.8
First Transfer Roll
ITU One 53.1 2.09
Second Transfer Roll
2
nd
XferRoll All 59.4 2.34
ITU Drive / Back-up Rolls ITU All 101.0 3.98
ITU Reverse Roll ITU All 50.5 1.99
Fuser Hot Roll All 148.0 5.83
Fuser BUR
Fuser
All 147.0 5.79
Metering Rolls Reference Edge All 47.0 1.85
Color Charge Roll (CR)Short C, M, or Y Cart C, M, & Y 101.0 3.98
NIP Shock
Defect Period NIP Distances
mm inches
Y-C-M-K Cartridge Spacing 101.0 3.98
K to Second Transfer Roll 144.6 5.69
M to Second Transfer Roll 245.6 9.67
C to Second Transfer Roll 346.6 13.65
Y to Second Transfer Roll 447.6 17.62
Meter 1 to Second Transfer 164.8 6.49
Meter 2 to Second Transfer 126.4 4.98
Meter 3 to Second Transfer 86.4 3.40
Meter 4 to Second Transfer 51.4 2.02
2
nd
Transfer to Fuser 319.4 12.57
Fuser Nip to First Redrive 50.0 1.97
Fuser Nip to Exit Sensor 58.2 2.29
Fuser Nip to Exit Tray Nip 420.3 16.55
Reference
Charge Roll
Fuser HR / BUR
Reference
Components Nip Shock
K to 2
nd
Xfe
r
M to 2
nd
Xfe
r
Meter 1 to 2
nd
Xfe
r
NOTE: Do not use the side rulers to assess repeating defects if the left and right
calibration lines do not measure 110 mm respectively.
When printing this document, make sure ‘Fit to page’ is not selected.
PC
ITU Drive / Back
-
up/CR Short
Cartridge Spacing
Meter 3 to 2
nd
Xfe
r
Meter 2 to 2
nd
Xfe
r
TAR
Dev Roll
1
st
Xfer Roll
2
nd
Xfer Roll
Meter 4 to 2
nd
Xfe
r
Fuser Nip to 1
st
Redi
r
ve
110mm Calibration Mark
110mm Calibration Mark