Xerox Phaser 3155 User Manual

							Phaser 3140/3155/3160 Printer Service Manual5-5
Print-Quality Troubleshooting
Check the Transfer Roller
Surface damage or the accumulation of dust and debris on the Transfer Roller can 
also cause print quality defects. Remove an
d inspect the Transfer Roller (page 8-8). 
Replace the roller if excessively worn or damaged.
Caution
Do not touch the surface of the Transfer Roller. Clean the Transfer Roller 
surface with a dry cotton swab or lint-free cloth.
Check the Image
Examine the print to determine the defect type. Match the defect to one or more 
of the following examples. Use the accompanying procedure to isolate or resolve 
the problem. If the defect persists, go to the troubleshooting procedure for the 
observed defect.
1. Print is too light. a. The toner may be too low. Check the  amount of toner and change the Print 
Cartridge if necessary.
b. If you are printing on a rough print  surface, change the media type settings.
c. Check that the correct type of media is  used.
d. The Print Cartridge may need to be  replaced. Replace the Print Cartridge.
2. Toner smears or print comes off the page. a. If you are printing on thick or uneven  media, change the media type settings to 
a heavier type.
b. Check that the media meets  specifications (refer to “Media and Tray 
Specifications” on page 1-16).
Light or Undertone Print
Smudges or Smears
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							5-6Phaser 3140/3155/3160 Printer Service Manual
Print-Quality Troubleshooting
3. Toner spots appear on the page and printing 
is blurred.
a. Print the Cleaning Page several times  (page 4-2).
b. Check the Print Cartridge to make sure  that it is installed correctly.
c. Replace the Print Cartridge.
4. Entire page is white. a. Ensure the packaging material is removed  from the Print Cartridge.
b. Check the Print Cartridge to make sure  that it is installed correctly.
c. Toner may be low. Change the Print  Cartridge.
d. Check the Laser windows for obstructions. 
5. Streaks appear on the page. a. Toner may be low. Change the Print  Cartridge.
7. Part of the page prints. a. Check the Print Cartridge to make sure it  is installed correctly.
Random Spots
Blank Print
Horizontal Band, Void, or Streaks
Partial Band
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							Phaser 3140/3155/3160 Printer Service Manual5-7
Print-Quality Troubleshooting
8. The job prints, but the top and side margins 
are incorrect.
a. Ensure the media size settings match the  loaded media.
b. Ensure the margins are set correctly in  your software application and evaluate 
the print.
9. Printing on both ends of the transparencies is  faded.
This occurs when the printer is operating at a 
location where relative humidity reaches 85° 
or more.
a. Adjust the humidity or relocate the  printer to an appropriate environment.
Image Not Centered
Light Print on Transparency
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							5-8Phaser 3140/3155/3160 Printer Service Manual
Print-Quality Troubleshooting
Print-Quality Troubleshooting Procedures
Print-Quality Defect Definitions
The following table lists print-quality defects, their definition, and the page where 
each corrective procedure appears.
DefectDefinitionGo to
Repeating Defects A pattern of ho rizontal lines or spots. page 5-9
Printing Begins at 
Wrong Position Printing begins at wrong position on the paper. page 5-10
Light or Undertone 
Print The overall image density is too light. page 5-10
Black Print The entire image area is black. page 5-11
Uneven Density Density is uneven between left and right sides. page 5-13
Background 
Contamination A light or gray contamination appears on all or 
most of the page. page 5-14
Ghosting (1) There is ghosting at 75.3 mm intervals on the  entire print. page 5-15
Ghosting (2) Ghosting appears at 75.3 mm intervals when  printing on card stock or transparencies from 
the manual feeder. page 5-16
Ghosting (3) White ghosting appears at 75.3 mm intervals. page 5-17
Ghosting (4) There is ghosting at 75.3 mm intervals. Fuser  operating temperature is too high. page 5-18
Ve r t ica l  W h i te  
Lines There is faded or white lines from the leading 
edge to the trailing edge. page 5-19
Vertical Lines are 
Curved The vertical components of the image are 
curved. page 5-20
Vertical Black Line 
or Band There are faded or black 
lines from the leading 
edge to the trailing edge. page 5-21
Horizontal Black 
Line or Band There are black lines running parallel with the 
leading edge of the print. page 5-22
Black or White 
Spots The toner image is not completely fused to the 
paper. The image easily rubs off. page 5-23
Skew The printed image is not parallel with the  media. page 5-24
Stains on the Front 
of the Page The background of the front of the page is 
stained. page 5-26
Stains on the Back 
of the Page The back of the page is stained. page 5-27
Blank Page (1) The entire image area is blank. page 5-28
Blank Page (2) The entire print is blank. One or several blank  pages are printed. page 5-29
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							Phaser 3140/3155/3160 Printer Service Manual5-9
Print-Quality Troubleshooting
Repeating Defects
When horizontal lines or spots occur repetitively, it could indicate a roller defect. 
Measure the interval of the print defect and check the measurement against the 
roller diameters in the table. The interval does not necessarily match the 
circumference of the roller.
Roller Dimensions
Roller  Circumference Abnormal 
Image PartParts List 
No.
OPC Drum 75.3 mm (2.96 in) White spots, 
Black spots Print 
CartridgePL1.0.12
Charge Roller 37.5 mm (1.48 in) Ghosting, Black 
spot and 
Periodic band Print 
Cartridge
PL1.0.12
Supply Roller 49 mm (1.93 in) Periodic bands 
of different 
density Print 
Cartridge
PL1.0.12
Developing 
Roller 35 mm
(1.38 in) White spots, 
Black bands Print 
CartridgePL1.0.12
Transfer Roller Ghosting or  poor fusingTrans fer 
RollerPL1.0.8
Pressure Roller Background Fuser PL9.0.34
Heat Roller Black spot and  image ghostFuser PL9.0.36
s3160-141OPC Drum Charge RollerHeat RollerTransfer Roller
Supply Roller
Developing Roller
Pressure Roller
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							5-10Phaser 3140/3155/3160 Printer Service Manual
Print-Quality Troubleshooting
Printing Begins at Wrong Position
Printing begins at wrong position on the paper.
Light or Undertone Print
The overall image density is too light. The Pr
int Cartridge is at or near end of life, 
Toner Save mode is On, or the high-voltage contacts between the Power Supply 
and Print Cartridge are damaged or dirty.
Initial Actions
• Check the Print Cartridge life count. 
• Agitate the Print Cartridge to redistribute the toner.
• Set Toner Save mode to Off. Troubleshooting Procedure Table 
Step Actions and Questions Yes No 1 Replace the Feed Sensor Actuator 
(page 8-40). Complete.
Troubleshooting Reference Table Applicable Parts Example Print
■Power Supply Board, PL1.0.1
■Print Cartridge, PL1.0.12
Light or Undertone Print
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							Phaser 3140/3155/3160 Printer Service Manual5-11
Print-Quality Troubleshooting
Black Print
The entire image is black. Charge voltage from the Power Supply Board to the Print 
Cartridge is not available due to damaged or dirty contacts.
Initial Actions
• Check the connection between the Controller Board and Power Supply Board.
• Check the connection between the Power Supply Board and Print Cartridge. Troubleshooting Procedure Table 
Step Actions and Questions Yes No 1 Check the Print Cartridge. 
Is the Print Cartridge empty? Replace the 
Print Cartridge 
(page 8-6).Go to step 2.
2 Check Toner Save mode.
Is Toner Save mode enabled? Go to step 3. Disable Toner 
Save mode. 
3 Check the ambient temperature.
Is the ambient temperature below 
10° C? Relocate the 
printer.
Go to step 4.
4 Check the interior for toner spills.
Is there toner spilled inside? Clean the 
inside of the 
printer.Go to step 5.
5 Check the Power Supply Board 
installation. Reseat the connectors if 
necessary.
Does the image quality improve? Complete. Replace the 
Power Supply 
Board 
(page 8-54).
Troubleshooting Reference Table Applicable Parts Example Print
■Controller Board, PL1.0.2
■Power Supply Board, PL1.0.1
■Laser Unit, PL6.0.79
Black Print
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							5-12Phaser 3140/3155/3160 Printer Service Manual
Print-Quality Troubleshooting
Troubleshooting Procedure Table
Step Actions and Questions Yes No 1 Check the connectors between the 
Controller Board and Power Supply 
Board.
Are the connectors secure? Go to step 3. Reconnect the 
connectors.
Go to step 2.
2 Does the error still occur? Go to step 3. Complete.
3 Replace the Power Supply Board 
(page 8-54).
Does the error still occur? Go to step 4. Complete.
4 Does the error still occur? Replace the 
Laser Unit 
(page 8-30).
Go to step 5.Complete.
5 Does the error still occur? Replace the 
Controller 
Board 
(page 8-51).Complete.
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							Phaser 3140/3155/3160 Printer Service Manual5-13
Print-Quality Troubleshooting
Uneven Density
Print density is uneven between the left and right sides. Possible causes include; 
uneven spring force at the ends of the Transfer Roller, the springs are damaged, 
the Transfer Roller is improperly installed, or the Transfer Roller bushing or holder is 
damaged.
Initial Actions
• Check the paper transfer path.
• Ensure there is no debris in the transfer path.
Troubleshooting Reference Table
Applicable Parts Example Print
■Transfer Roller, PL1.0.8
■Print Cartridge, PL1.0.12
Troubleshooting Procedure Table Step Actions and Questions YesNo
1 Check the Transfer Roller 
installation. Reseat the Transfer 
Roller if necessary (page 8-8).
Does the image quality improve? Complete. Go to step 2.
2 Check the Print Cartridge.
Is the Print Cartridge empty or 
damaged? Replace the 
Print Cartridge 
(page 8-6).Complete.
Color Uneven or Wrong (Process Direction)
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							5-14Phaser 3140/3155/3160 Printer Service Manual
Print-Quality Troubleshooting
Background Contamination
There is toner contamination on all or most of the page. The contamination 
appears as a very light gray dusting. The Print Cartridge is designed to print 2,000 
sheets at 5% coverage. If prints typically are below 5% coverage, background 
contamination can occur.
Initial Actions
• Check the paper transfer path.
• Ensure there is no debris in the transfer path.
Troubleshooting Reference Table
Applicable Parts Example Print
■Power Supply Board, PL1.0.1
■Transfer Roller, PL1.0.8
■Print Cartridge, PL1.1.12
Troubleshooting Procedure Table Step Actions and Questions YesNo
1 Check the paper condition.
Is the paper dry, a recommended 
type, and loaded in the correct 
position? Go to step 2. Replace the 
paper.
2 Print out the Supplies Information 
Report (page 4-2), and check usage 
patterns.
Does the typical print have less than 
5% coverage? Go to step 3. Go to step 4.
3 Check the Print Cartridge. Is the 
Print Cartridge at or near end of life? Replace the 
Print Cartridge 
(page 8-51).Go to step 4.
4 Check the Transfer Roller movement.
Does the Transfer Roller rotate 
smoothly? Go to step 5. Clean the 
Transfer Roller 
bushings.
Background Contamination
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