May 2013
3-19
Xerox® WorkCentre® 5790 Family
IQ6, IQ7
Image Quality
IQ6 Narrow Bands RAP
Use this RAP to determine the cause of narrow bands.
Ensure
IQ1
Image Quality Entry RAP is performed before starting this RAP.
Procedure
WARNING
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.
Check the pitch of the bands. The bands have a regular pitch.
Y
N
Bands that are irregular are caused by worn gears in the following areas. Examine the
gears, the shafts and the bearings,
GP 7
.
•
Registration transport gears;
PL 8.15 Item 17
,
PL 8.15 Item 18
and
PL 8.15 Item 19
.
•
Registration transport drive pulley, (35-55 ppm)
PL 4.17 Item 14
or (65-90 ppm)
PL
4.12 Item 15
.
•
Main drive belts; (35-55 ppm)
PL 4.17 Item 9
or (65-90 ppm)
PL 4.12 Item 9
and
PL
4.12 Item 18
.
•
Developer drive gear, (35-55 ppm)
PL 4.17 Item 15
or (65-90 ppm)
PL 4.12 Item 17
.
•
Fuser drive gear, (35-55 ppm)
PL 4.17 Item 10
or (65-90 ppm)
PL 4.12 Item 10
.
•
Developer assembly, (35-55 ppm)
PL 9.17
or (65-90 ppm)
PL 9.15
.
•
Short paper path (W/O
TAG 114
) gears,
PL 10.25 Item 3
and
PL 10.25 Item 5
.
•
Install new components as necessary.
The ROS makes the narrow bands that are only visible on half tones prints.
•
Machine speed of 35-55 ppm, the pitch is 9.8 bands to 1cm (25 bands to 1 inch).
•
Machine speed of 65-90 ppm, the pitch is 10 bands to 1 cm (25 bands to 1 inch).
To resolve banding caused by motion wobble of the ROS, install a new ROS,
PL 6.10 Item 4
.
IQ7 DADH, Document Glass and Scanner RAP
Use this RAP to identify failures caused by the DADH, document glass and the scanner.
Ensure
IQ1
Image Quality Entry RAP is performed before starting this RAP.
Procedure
WARNING
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 following:
•
DADH Checkout
•
Document Glass Checkout
•
Scanner Checkout (W/O TAG 150)
•
Scanner Checkout (W/TAG 150)
DADH Checkout
Perform the following:
•
Clean the underside of the DADH area around the CVT roll,
PL 5.25
.
•
Clean the top surface of the CVT glass and the document glass. Refer to
ADJ 14.1
Optics
Cleaning Procedure (W/O
TAG 150
) or
ADJ 14.2
Optics Cleaning Procedure (W/
TAG
150
).
•
If the documents are skewed. Check that the document input guides are correctly
adjusted.
•
Check that the DADH is seated correctly, perform the
ADJ 5.2
DADH Height Adjustment.
•
Make copies from the DADH and the document glass. If the copies from the DADH are
lighter or darker than those from the document glass, perform the following:
–
Go to
dC131
NVM Read / Write location 15-007 CVT scanning image gain. The
default value is 3. If the value is increased copies made from the DADH will be
darker. If the value is decreased, copies made from the DADH will be lighter.
•
Make copies from the DADH. If the copies have a background problem, perform the fol-
lowing:
–
Check the DADH height, Refer to
ADJ 5.2
DADH Height Adjustment.
–
Check the registration. Refer to
dC604
Registration Setup.
–
Copying thick documents can leave the DADH raised above the document glass.
Raise and lower the DADH five times. If the DADH is still raised, install new counter-
balance,
PL 5.10 Item 2
and
PL 5.10 Item 4
.
•
Make copies from the DADH. If the copies are stretched or smudged, perform the follow-
ing:
–
Lower the height of the DADH by half a turn of the setting screws, refer to
ADJ 5.2
DADH Height Adjustment. Make copies from the DADH after each adjustment. If the
fault persists, re-adjust the height of the DADH as necessary.
–
If the fault persists after the height of the DADH has been adjusted, install a new
DADH baffle assembly,
PL 5.30 Item 5
. Re-adjust the height of the DADH to the
default setting, refer to
ADJ 5.2
DADH Height Adjustment.
Summary of Contents for WorkCentre 5790 Series
Page 1: ...Xerox WorkCentre 5790 Family Service Manual 708P90298 May 2013 ...
Page 4: ...May 2013 ii Xerox WorkCentre 5790 Family Introduction ...
Page 20: ...May 2013 xviii Xerox WorkCentre 5790 Family Translation of Warnings Introduction ...
Page 22: ...May 2013 1 2 Xerox WorkCentre 5790 Family Service Call Procedures ...
Page 32: ...May 2013 1 12 Xerox WorkCentre 5790 Family SCP 7 Service Call Procedures ...
Page 53: ...May 2013 2 21 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 1 3 3V Return ...
Page 54: ...May 2013 2 22 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 2 3 3V Return ...
Page 56: ...May 2013 2 24 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 3 5V Return ...
Page 57: ...May 2013 2 25 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 4 5V Return ...
Page 59: ...May 2013 2 27 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 5 12V Return ...
Page 61: ...May 2013 2 29 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 6 24V Return ...
Page 62: ...May 2013 2 30 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 7 24V Return ...
Page 63: ...May 2013 2 31 Xerox WorkCentre 5790 Family 01B Status Indicator RAPs Figure 8 24V Return ...
Page 95: ...May 2013 2 63 Xerox WorkCentre 5790 Family 01K Status Indicator RAPs Figure 2 Circuit diagram ...
Page 96: ...May 2013 2 64 Xerox WorkCentre 5790 Family 01K Status Indicator RAPs ...
Page 178: ...May 2013 2 146 Xerox WorkCentre 5790 Family 06 350 Status Indicator RAPs ...
Page 592: ...May 2013 2 560 Xerox WorkCentre 5790 Family 16B 16C Status Indicator RAPs ...
Page 596: ...May 2013 2 564 Xerox WorkCentre 5790 Family 19 409 Status Indicator RAPs ...
Page 698: ...May 2013 3 2 Xerox WorkCentre 5790 Family Image Quality ...
Page 736: ...May 2013 3 40 Xerox WorkCentre 5790 Family IQS 8 Image Quality ...
Page 742: ...May 2013 4 6 Xerox WorkCentre 5790 Family Repairs Adjustments ...
Page 772: ...May 2013 4 34 Xerox WorkCentre 5790 Family REP 3 4 Repairs Adjustments ...
Page 938: ...May 2013 4 200 Xerox WorkCentre 5790 Family REP 9 10 Repairs Adjustments ...
Page 994: ...May 2013 4 256 Xerox WorkCentre 5790 Family REP 11 17 110 Repairs Adjustments ...
Page 1014: ...May 2013 4 276 Xerox WorkCentre 5790 Family REP 11 15 120 Repairs Adjustments ...
Page 1166: ...May 2013 4 428 Xerox WorkCentre 5790 Family REP 14 20 Repairs Adjustments ...
Page 1168: ...May 2013 4 430 Xerox WorkCentre 5790 Family ADJ 3 1 ADJ 3 2 Repairs Adjustments ...
Page 1174: ...May 2013 4 436 Xerox WorkCentre 5790 Family ADJ 4 1 Repairs Adjustments ...
Page 1242: ...May 2013 4 504 Xerox WorkCentre 5790 Family ADJ 14 1 ADJ 14 2 Repairs Adjustments ...
Page 1386: ...May 2013 6 2 Xerox WorkCentre 5790 Family General Procedures Information ...
Page 1524: ...May 2013 6 140 Xerox WorkCentre 5790 Family Fax Tags General Procedures Information ...
Page 1526: ...May 2013 7 2 Xerox WorkCentre 5790 Family Wiring Data ...
Page 1554: ...May 2013 7 30 Xerox WorkCentre 5790 Family PJ Locations Wiring Data ...
Page 1604: ...May 2013 8 2 Xerox WorkCentre 5790 Family Accessories ...
Page 1606: ...May 2013 8 4 Xerox WorkCentre 5790 Family ACC 1 Accessories ...
Page 1610: ...XEROX EUROPE ...