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Reference
C77x, C78x Repeating Defect Locator
Components
Rollers
Charge Roll
TAR
Dev Roll
1
Xfer Roll
st
2
Xfer Roll
nd
PC
ITU Drive / Back-
up/CR Short
110mm Calibration Mark
Fuser HR / BUR
Lexmark International, Inc.
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.
Component
Description
Charge Roll
PC Drum
PC Cleaner
Developer Roll
TAR
Toner Meter
Cart Auger
First Transfer Roll
Second Transfer Roll
ITU Drive / Back-up Rolls
ITU Reverse Roll
Fuser Hot Roll
Fuser BUR
Metering Rolls
Color Charge Roll (CR)Short
NIP Shock
NIP Distances
Y-C-M-K Cartridge Spacing
K to Second Transfer Roll
M to Second Transfer Roll
C to Second Transfer Roll
Y to Second Transfer Roll
Meter 1 to Second Transfer
Meter 2 to Second Transfer
Meter 3 to Second Transfer
Meter 4 to Second Transfer
2
Transfer to Fuser
nd
Fuser Nip to First Redrive
Fuser Nip to Exit Sensor
Fuser Nip to Exit Tray Nip
Component
Planes
Effected
One
One
One
Cartridge
One
One
One
One
ITU
One
2
XferRoll
All
nd
ITU
All
ITU
All
All
Fuser
All
Reference Edge
All
C, M, or Y Cart
C, M, & Y
Defect Period
mm
inches
101.0
3.98
144.6
5.69
245.6
9.67
346.6
13.65
447.6
17.62
164.8
6.49
126.4
4.98
86.4
3.40
51.4
2.02
319.4
12.57
50.0
1.97
58.2
2.29
420.3
16.55
Revision 3.1
Reference
Defect Period
mm
inches
38.2
1.5
Fuser Nip to 1
93.8
3.69
Meter 4 to 2
96.8
3.8
46.3
1.82
48.2
1.9
1092.2
43.0
349.9
13.8
Meter 3 to 2
53.1
2.09
59.4
2.34
Cartridge Spacing
101.0
3.98
50.5
1.99
110mm Calibration Mark
148.0
5.83
147.0
5.79
Meter 2 to 2
47.0
1.85
101.0
3.98
Meter 1 to 2
Nip Shock
Redirve
st
Xfer
nd
Xfer
nd
Xfer
nd
K to 2
Xfer
nd
Xfer
nd
M to 2
Xfer
nd
July 13, 2004
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