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December 2006
3-8
WorkCentre M20, 4118, FaxCentre 2218 Family
IQ2
Image Quality
IQ2 Blank Copies RAP
Use this RAP when the machine produces blank copies.
Procedure
WARNING
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
NOTE: If necessary, refer to GP 20 for the acronym list and cross reference lists of more com-
monly recognised part names.
Determine the source of the problem. Make a print. Make a copy.
If the fault appears only in the copy mode, perform the following:
1.
Ensure the scanner cover is closed. Room illumination can be transmitted through thin
originals.
2.
Ensure that the scanner lock, PL 14.11 Item 20 is completely unlocked.
3.
Go to GP 3, Service Mode Entry. Scroll to System Admin Tools/Maintenance. Perform the
Adjust Shading procedure. If the Shading Test fails, install new components as neces-
sary:
NOTE: Refer to GP 6 Maintenance for additional information about the shading test.
•
ELA HOU - CCD module, PL 14.11 Item 16.
•
CBF signal - CCD FFC, PL 14.11 Item 17.
•
ELA HOU - scanner assembly, PL 14.10 Item 1.
•
PBA main (M20F), PL 1.10 Item 4.
•
PBA main (4118), PL 1.15 Item 9.
•
PBA main (2218), PL 1.20 Item 9.
4.
(M20F/2218) If the machine makes multiple blank copies after a single good copy, go to
the IQ19 DADF Lead Edge Offset RAP.
If the fault appears in all modes, perform the following:
1.
Examine the ELA - toner unit set, PL 9.10 Item 2 and the ELA Unit - OPC drum set, PL
9.10 Item 1. Ensure they are free from all packing or sealing material.
2.
Shake the ELA - toner unit set. If there is a slight improvement in the image, the ELA -
toner unit set is empty. Install a new ELA - toner unit set, PL 9.10 Item 2.
3.
Go to GP 1 Engine Test Mode Entry and perform the LSU tests (test 1).
4.
Refer to the following:
•
(M20F) Wiring Diagram 3
•
(4118) Wiring Diagram 9
•
(2218) Wiring Diagram 14
Perform the following as necessary:
•
The LSU is supplied with +5V through the CBF - harness. Enter GP 1 Engine Test
Mode Entry. Use the sensor test (test 2) to check the CBF - harness; switch micro.
Check that both micro switches in the CBF - harness; Switch Micro are switching;
one controls the +5V to the unit - LSU. If necessary, install a new CBF - harness;
switch - micro, PL 4.17 Item 2.
•
Check the wiring between the unit - LSU and the PBA main. Repair or install a new
CBF harness - LSU, PL 6.10 Item 2, as necessary.
•
Install a new unit - LSU, PL 6.10 Item 1.
5.
Refer to Wiring Diagram 1 (M20F) or Wiring Diagram 8 (4118/2218). Go to GP 1, Engine
Test Mode Entry. Perform test number 5 to check the MHV ADC read and THV ADC read
values. If necessary perform the following:
•
Check the contact springs supplying the voltages to the ELA Unit - OPC drum set
and the wiring to the SMPS + HVPS (M20F) or HVPS (4118/2218).
•
Install a new ELA Unit - OPC drum set, PL 9.10 Item 1.
•
(M20F) Install a new SMPS + HVPS, PL 1.12 Item 4.
•
(4118) Install a new HVPS, PL 1.15 Item 10.
•
(2218) Install a new HVPS, PL 1.20 Item 10.
6.
(M20F) Refer to Wiring Diagram 1. Check the ELA Unit - OPC drum set ground connec-
tion, perform the following:
a.
Remove the ELA - toner unit set, PL 9.10 Item 2 and the ELA Unit - OPC drum set,
PL 9.10 Item 1.
b.
Perform REP 1.1 steps 1 and 2 to remove the IPR - shield SMPS upper, PL 1.12
Item 1.
c.
Reconnect the 2 ground harnesses to the lower SMPS shield.
d.
Check for continuity between the IPR - terminal GND OPC, PL 4.15 Item 5 and the
OPC GND terminal on the SMPS + HVPS.
e.
Disconnect the OPC ground harness from the SMPS + HVPS.
f.
Check the resistance between the OPC ground terminal and the ground terminal in
the CBF harness inlet, PL 1.10 Item 8. The resistance measured should be approxi-
mately 3M ohms.
NOTE: The path from the board to ground is via a diode. Make sure that the positive
probe (red) of the service meter is connected to the OPC ground terminal.
g.
Install new components as necessary.
7.
(4118/2218) Refer to Wiring Diagram 8. Check the ELA Unit - OPC drum set ground con-
nection, perform the following:
a.
Remove the ELA - toner unit set, PL 9.10 Item 2 and the ELA Unit - OPC drum set,
PL 9.10 Item 1.
b.
Check for continuity between the IPR - terminal GND OPC, PL 4.15 Item 5 and the
OPC GND terminal on the HVPS.
c.
Disconnect the OPC ground harness from the HVPS.
d.
Check the resistance between the OPC ground terminal and the ground terminal in
the CBF harness inlet, (4118) PL 1.15 Item 8 or (2218) PL 1.20 Item 8. The resis-
tance measured should be approximately 3M ohms.
NOTE: The path from the board to ground is via a diode. Make sure that the positive
probe (red) of the service meter is connected to the OPC ground terminal.
e.
Install new components as necessary.
8.
Print a test pattern. For example, print the help list from the reports menu, GP 2 User
Entry Mode. Install new components as necessary:
•
PBA main (M20F), PL 1.10 Item 4.
•
PBA main (4118), PL 1.15 Item 9.
•
PBA main (2218), PL 1.20 Item 9.
Содержание M20 - WorkCentre B/W Laser
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Страница 5: ...December 2006 Xerox WorkCentre M20 4118 FaxCentre 2218 Family Service Manual...
Страница 10: ...December 2006 ii WorkCentre M20 4118 FaxCentre 2218 Family Introduction...
Страница 40: ...December 2006 1 2 WorkCentre M20 4118 FaxCentre 2218 Family Service Call Procedures...
Страница 46: ...December 2006 1 8 WorkCentre M20 4118 FaxCentre 2218 Family SCP 7 Service Call Procedures...
Страница 48: ...December 2006 2 2 WorkCentre M20 4118 FaxCentre 2218 Family Status Indicator RAPs...
Страница 54: ...December 2006 2 8 WorkCentre M20 4118 FaxCentre 2218 Family 6 1 Status Indicator RAPs...
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Страница 68: ...December 2006 2 22 WorkCentre M20 4118 FaxCentre 2218 Family 10 3 Status Indicator RAPs...
Страница 72: ...December 2006 2 26 WorkCentre M20 4118 FaxCentre 2218 Family 20 3 Status Indicator RAPs...
Страница 78: ...December 2006 3 2 WorkCentre M20 4118 FaxCentre 2218 Family Image Quality...
Страница 100: ...December 2006 4 2 WorkCentre M20 4118 FaxCentre 2218 Family Repairs and Adjustments...
Страница 110: ...December 2006 4 12 WorkCentre M20 4118 FaxCentre 2218 Family REP 1 7 Repairs and Adjustments...
Страница 134: ...December 2006 4 36 WorkCentre M20 4118 FaxCentre 2218 Family REP 5 3 Repairs and Adjustments...
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Страница 146: ...December 2006 4 48 WorkCentre M20 4118 FaxCentre 2218 Family REP 8 6 Repairs and Adjustments...
Страница 158: ...December 2006 4 60 WorkCentre M20 4118 FaxCentre 2218 Family ADJ 1 1 Repairs and Adjustments...
Страница 160: ...December 2006 4 62 WorkCentre M20 4118 FaxCentre 2218 Family ADJ 5 1 ADJ 5 2 Repairs and Adjustments...
Страница 162: ...December 2006 5 2 WorkCentre M20 4118 FaxCentre 2218 Family Parts Lists...
Страница 206: ...December 2006 5 46 WorkCentre M20 4118 FaxCentre 2218 Family Part Number Index Parts Lists...
Страница 208: ...December 2006 6 2 WorkCentre M20 4118 FaxCentre 2218 Family General Procedures and Information...
Страница 276: ...December 2006 6 70 WorkCentre M20 4118 FaxCentre 2218 Family GP 26 General Procedures and Information...
Страница 280: ...December 2006 7 2 WorkCentre M20 4118 FaxCentre 2218 Family Wiring Data...
Страница 308: ...December 2006 7 30 WorkCentre M20 4118 FaxCentre 2218 Family Wiring Data...
Страница 310: ...December 2006 8 2 WorkCentre M20 4118 FaxCentre 2218 Family Accessories...
Страница 314: ...December 2006 8 6 WorkCentre M20 4118 FaxCentre 2218 Family ACC 2 Accessories...