Xerox Phaser 4500 Service Manual page 244

Print-Quality Troubleshooting
5-28
Horizontal Streaks Troubleshooting Procedure (continued)
Step Actions and Questions
1. Install a new print cartridge.
3
2. Print a test print.
Do the prints have horizontal
streaks?
Verify that the connectors on the
4
Laser Assembly are firmly
connected.
Verify that the Laser Assembly is
firmly connected to the frame.
Replace Drive Assembly and gear
5
assembly housing
Reprint the problem image.
Does the problem still occur?
Inspect the transfer roller
6
assembly for contamination and
wear.
Is the transfer roller free of
contamination and wear?
7 1. On the control panel, scroll to
Information, then press the
OK button.
2. Scroll to
Information
then select the OK button.
3. Scroll to Print Test
then press the OK button.
4. Switch OFF the printer power
halfway through the print cycle.
5. Carefully remove the print
cartridge and inspect the toner
image on the drum just before
the transfer area (transfer
roller).
Is the image on the Drum
developed with sharp, black,
easily read areas and no
horizontal streaks?
Inspect the toner image on the
8
paper immediately after the
transfer area (transfer roller).
Is the toner image on the paper
clear without any horizontal
streaks?
Yes
Problem solved.
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
Pages,
Prints,
Go to step 9.
Phaser 4500/4510 Service Manual
No
Go to step 4.
Reconnect the
connectors and/or re-
install the Laser
Assembly.
Problem solved.
Replace the transfer
roller assembly
(page 8-45).
Go to High-Voltage
Power Supply
(HVPS) Assembly
(page 4-32).
Replace the transfer
roller assembly
(page 8-45).