Iq13 Cockle Deletion Rap; Image Quality Specifications - Xerox WorkCentre 5790 Series Service Manual

IQ13 Cockle Deletion RAP

Use this RAP to cure intermittent cockle deletion on buckled/rippled copies.
Initial Actions
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to GP 14. Disconnect the power cord. Electricity can cause
death or injury. Moving parts can cause injury.
Perform the IQ1 Image entry RAP before starting this RAP.
Procedure
Print internal test pattern number 16, dC606. Run 20 off 1 and 2 sided copies of test pattern
number 16, and then check the copies for cockle deletions. If cockle deletions are present they
appear as shown in Figure 1.
Figure 1 Cockle deletions
These deletions appear when the paper is buckled in the duplex transport and registration
transport assemblies. The effect of the buckling forms a permanent ripple in each sheet of
paper which leads poor image transfer. The known causes of paper buckle are:
• Worn/damaged components within the duplex transport assembly.
Image Quality
IQ13
WARNING
Lead edge of test pattern 16
Typical areas of image deletion
• worn/damaged components within the registration transport assembly
Remove the duplex transport assembly,
7. The duplex transport assembly is in good condition.
Y N
Install a new duplex transport assembly, (35-55 ppm)
8.20 Item 1.
Remove the registration transport assembly,
GP 7. The registration transport assembly is in good condition.
Y N
Replace the registration transport assembly, (35-55 ppm)
PL 8.17 Item 1.
Refer to GP 18, lubricate the registration transport nip assembly.
Print internal test pattern number 16, dC606. Run 20 off 1 and 2 sided copies of test pattern
number 16, and then check the copies for cockle deletions. The copies are good.
Y N
Perform ADJ 8.2 Simplex and Duplex Buckle Timing.
Record all changes in the log book for future reference. Perform
May 2013
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REP 8.7, then inspect the assembly for damage,
PL 8.22 Item 1 or (65-90 ppm)
REP 8.4, then inspect the assembly for damage,
PL 8.15 Item 1 or (65-90 ppm)
SCP 6 Final Actions.
Xerox® WorkCentre® 5790 Family
GP
PL