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...

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...

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...

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...

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...

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....

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...

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...

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...

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...