May 2013
4-461
Xerox® WorkCentre® 5790 Family
ADJ 9.1, ADJ 9.2
Repairs/Adjustments
ADJ 9.1 Corotron Cleaning
Parts List on (35 ppm)
PL 9.22
, (40-90 ppm)
PL 9.20
.
Purpose
To clean the corotrons.
Adjustment
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.
1.
(35 ppm) Remove the transfer/detack corotron,
PL 9.22 Item 8
, from the short paper path
assembly,
PL 10.25 Item 1
.
2.
Use a soft small brush to remove any small particle that may be on the corotron wire.
3.
Reinstall the transfer/detack corotron in the short paper path.
4.
(40-90 ppm) These machines have a cleaning device for the transfer/detack corotron.
Move the device back and forward to clean the transfer/detack wires. If the transfer/
detack corotron is heavily contaminated then the corotron assembly can be removed and
cleaned with a brush.
5.
Raise and lower the latch mechanism of the short paper path assembly,
PL 10.25 Item 1
,
to ensure that the transfer/detack corotron is parallel to the photoreceptor. If the move-
ment of raising the short paper path assembly is not smooth, check the action of the push
rod,
PL 10.25 Item 13
,
REP 10.1
.
NOTE: Do not attempt to clean the corotron wires with any solvents or wipe clean using paper.
If necessary install a new transfer/detack corotron,
PL 10.25 Item 11
.
ADJ 9.2 Image Quality Adjustment Routine
Purpose
The Image Quality Adjustment (IQA) feature allows adjustment of the image quality by adjust-
ment of the Grid Voltage and ROS Exposure levels. This is achieved by running an Image
Quality Adjustment routine from within SAKO tools. This routine can be performed at any stage
of the machine’s operational life by the key operator.
Adjustment
The adjustment routine consists of the steps that follow:
1.
Load A4 (8.5x11 inch) white paper LEF in the Bypass Tray.
2.
Turn off or reset to nominal all image enhance features.
3.
Enter Customer Administration Tools,
GP 24
.
4.
Select the Troubleshooting tab.
5.
Select Image Quality Adjustments.
6.
Follow the prompts in the image quality adjustment window.
7.
Example of the IQA test pattern is shown in
Figure 1
.
8.
When the test pattern image is scanned, the following sequence of events occur:
a.
The average image density (grey level measured on a grey scale; 0 = black, 255 =
white) of the shadow and highlight is measured to obtain two respective averages. If
the average for either the highlight or shadow is out of range, the image cannot be
used reliably and the routine is terminated with an appropriate message displayed
on the GUI.
b.
Once the validity of the test pattern has been confirmed the measured average grey
levels of the shadow and highlights are compared against shadow and highlight
Grey Level reference values contained in NVM, producing a shadow error and high-
light error.
c.
These errors are then used together with pre-stored IQA factors to determine a Grid
Voltage Offset and a ROS exposure Offset.
d.
Range checking and capping is then performed to limit any unexpected behavior.
e.
The SIP sends these offsets to the IOT to be stored in IOT NVM.
f.
The Grid Voltage and ROS exposure are then adjusted by applying the relevant off-
set to the nominal setting after any other adjustments are applied (e.g. calibration or
Process Control adjustments etc.).
9.
If a fault occurs on completion of the routine then refer to the relevant RAP.
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 ...