Xerox 4400DT - Phaser B/W Laser Printer Service Manual page 159

Horizontal Deletions Troubleshooting Procedure
Step Actions and Questions
1 1. Enter Service Diagnostics and select Engine Test
Print.
2. Scroll to Print Quantity and press OK.
3. Select 5, then press OK.
4. Scroll to Print Test Pattern and press OK.
Do the prints have horizontal deletions?
2 1. Exit Service Diagnostics.
2. When the printer has restarted, select Printable
Pages Menu.
3. Scroll to Print Configuration Pages and press OK.
Do the prints have horizontal deletions?
3 1. Load fresh, dry paper.
2. Print a test print.
Is the problem still present?
4 1. Install a new Print Cartridge.
2. Print a test print.
Is the problem still present?
5 Inspect the Transfer Roller Assembly for contamination
and wear.
Is the Transfer Roller free of contamination and
wear?
6 1. Select the Printable Pages Menu, scroll to Print Test
Prints, and press OK.
2. Switch OFF the printer power halfway through the
print cycle.
3. 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 completely developed
with sharp, black, easy-to-read areas and no
horizontal deletions?
7 Inspect the toner image on the drum immediately after
the transfer area (Transfer Roller).
Was the toner image on the drum transferred to
the paper?
3-62
Yes
Go to step 3.
Remove and
reseat the
Image
Processor
Board. If the
problems
persist,
replace the
Image
Processor
Board (RRP
9.2 on
page
Go to step 4.
Go to step 5.
Go to step 6.
Go to step 7.
Go to step 8.
Phaser 4400 Laser Printer Service Manual
No
Go to step 2.
The problem
appears to
be with the
host
computer or
the cables. If
the problems
persist,
replace the
Image
Processor
Board (RRP
6-88). 9.2 on
page 6-88).
Problem
solved.
Problem
solved.
Replace the
Transfer
Roller
Assembly
(RRP 7.1 on
page 6-79).
Go to
High-Voltage
Power
Supply
(HVPS)
Assembly
page 3-31.
Go to
High-Voltage
Power
Supply
(HVPS)
Assembly
page 3-31.
on
on