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
Xfer
M to 2
nd
Xfer
Meter 1 to 2
nd
Xfer
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
Xfer
Meter 2 to 2
nd
Xfer
TAR
Dev Roll
1
st
Xfer Roll
2
nd
Xfer Roll
Meter 4 to 2
nd
Xfer
Fuser Nip to 1
st
Redirve
110mm
Calibration Mark
110mm
Calibration Mark
Summary of Contents for C77X
Page 15: ...Notices and safety information xv 5061...
Page 16: ...xvi Service Manual 5061...
Page 22: ...xxii Service Manual 5061...
Page 44: ...1 22 Service Manual 5061...
Page 182: ...2 138 Service Manual 5061...
Page 293: ...Repair information 4 61 5061 6 Release the MPF latch F and remove the MPF...
Page 325: ...Repair information 4 93 5061 3 Remove all connectors C 4 Remove the transfer HVPS board...
Page 338: ...4 106 Service Manual 5061...
Page 339: ...Connector locations 5 1 5061 5 Connector locations Locations Printer boards...
Page 340: ...5 2 Service Manual 5061 Printer motors...
Page 341: ...Connector locations 5 3 5061 Printer sensors...
Page 342: ...5 4 Service Manual 5061 Cartridge contact assembly pin locations cyan magenta and yellow...
Page 343: ...Connector locations 5 5 5061 Cartridge contact assembly pin locations black...
Page 345: ...Connector locations 5 7 5061 Connectors System board...
Page 358: ...5 20 Service Manual 5061 Transfer high voltage power supply HVPS...
Page 368: ...5 30 Service Manual 5061...
Page 372: ...6 4 Service Manual 5061...
Page 380: ...7 8 Service Manual 5061 Assembly 3 1 Fuser web oiler 1 3 2...
Page 402: ...7 30 Service Manual 5061 Assembly 22 Electronics 3 3 3 2 1...
Page 404: ...7 32 Service Manual 5061 Assembly 22 1 Electronics 3 5 4 8 1 9 10 2 2 6 6 6 7 6 6...
Page 408: ...7 36 Service Manual 5061 Assembly 23 Electronics cabling interconnections 1...
Page 410: ...7 38 Service Manual 5061 Assembly 24 Electronics cabling interconnections 2...
Page 420: ...7 48 Service Manual 5061 Assembly 28 1 5 Bin mailbox 3 3 3 3 11 7 13 5 9 2 10 6 4 12 8 14 1 15...
Page 422: ...7 50 Service Manual 5061 Assembly 29 500 Sheet drawer option 3 11 7 5 9 2 10 6 4 8 1...
Page 438: ...7 66 Service Manual 5061 Assembly 33 Envelope option 2 1...
Page 442: ...7 70 Service Manual 5061 Assembly 36 Options...
Page 444: ...7 72 Service Manual 5061...
Page 450: ...B 2 Service Manual 5061 Print Quality Pages Page 1 total of five...
Page 451: ...Appendix B Print quality samples B 3 5061 Print Quality Pages Page 2 total of five...
Page 452: ...B 4 Service Manual 5061 Print Quality Pages Page 3 total of five...
Page 453: ...Appendix B Print quality samples B 5 5061 Print Quality Pages Page 4 total of five...
Page 458: ...B 10 Service Manual 5061...
Page 466: ...I 8 Service Manual 5061...
Page 476: ...I 18 Service Manual 5061...
Page 478: ......
Page 479: ......
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