Table of Contents
Advertisement
20 July 2005
4.6.7 DARK/BLACK IMAGE
Description: Printed image is dark
Cause
1.
No charge voltage in the engine board.
2.
Charge voltage fault due to bad contact
between toner cartridge and cartridge set
3.
VD0 signal from main PBA is low
4.6.8 UNEVEN DENSITY
Description: Print density is uneven between left and right.
Cause
1.
Pressure force on the left and right
springs of the transfer roller is not even,
springs are damaged, transfer roller is not
correctly installed, transfer roller bushings
or holders are damaged.
2.
Toner cartridge has reached the end of its
life.
3.
Toner inside the cartridge is not level due
to damaged blade or low toner.
4.6.9 BACKGROUND
Description: Light dark background shows throughout the printout.
Cause
1.
The machine has not printed large
quantities of low coverage pages, or, the
machine has not been used for a long
time.
2.
A recycled toner cartridge is used.
3.
The toner cartridge has reached the end
of its life.
4.
The up/down movement of the transfer
roller is not smooth.
5.
HVPS is abnormal.
1.
Check the connector that connects the
HVPS and the engine board.
2.
Clean the high voltage charge terminals.
Replace the HVPS if the problem stays.
3.
Replace the LSU or main PBA.
1.
Replace both the left and right bush and
spring assemblies.
2.
Replace the toner cartridge.
3.
Gently shake the toner cartridge side to
side 5-6 times and try to print again.
Replace the toner cartridge if the problem
stays.
1.
The toner cartridge is deigned to print
3,000 sheets with 5% coverage.
Background can show if the machine
prints more than 3,600 pages with 2%
coverage.
2.
Machine operation is not guaranteed with
recycled toner cartridges. Gently shake
the toner cartridge side to side 5-6 times
and try to print again. Replace the toner
cartridge if the problem stays.
3.
Replace the toner cartridge.
4.
Clean the transfer roller bushes.
5.
Clean the high voltage charge terminals.
Replace the HVPS if the problem stays.
4-13
PRINTOUT PROBLEMS
Solution
Solution
Solution
Advertisement
Table of Contents
