Toner Sensor - Xerox Phaser 4500 Service Manual

General Troubleshooting

Toner Sensor

4-22
Troubleshooting Reference
Applicable Parts
Toner sensor
Toner sensor assembly
Toner harness assembly 1
Toner harness assembly 2
Print cartridge
HVPS/engine logic board
Note
P4500: Refer to SB651 Rev. 1. In the case of premature "Toner Low" or
"Replace Print Cartridge" messages, verify that PS Firmware v.1.26 or
later is installed in the printer before replacing the print cartridge. If it is
not, download the latest firmware from
results.asp?Xtype=download&prodID=4500&Xlang=en_US&Xcntry=USA
&source=XOG&prodName=Phaser%204500#Firmware%20&%20Machin
e%20Upgrades.
Troubleshooting Procedure
Steps Actions and Questions
1 Check the print cartridge (1):
Does sufficient toner remain in the print
cartridge?
2 Check the print cartridge (2):
Does the problem still occur after
replacing the print cartridge?
3 Check the toner sensor assembly
installation.
Is the toner sensor assembly installed
correctly, and does the D-Holder operate
smoothly?
4 Check the toner sensor function:
1. Enter Service Diagnostics, and from the
Sensor Tests
sensor.
2. Remove and replace the print cartridge.
Does the toner Sensor correctly detect the
presence of the toner in the print
cartridge?
Check the toner harness assembly 1:
5
1. Remove toner harness assembly 1.
2. Test for continuity across J220 <=> J221.
Is it continuous?
Wiring and Plug/Jack Map References
"150-Sheet Feeder, 550-Sheet Feeder, Main
Fan" on page 10-27
"Print Engine Wiring Diagrams" on page 10-19
"Print Engine Plug/Jack Locator" on page 10-3
http://www.support.xerox.com/go/
Yes
Go to step 3.
Go to step 3.
Go to step 4.
Go to step 7.
menu select toner
Go to step 6.
Phaser 4500/4510 Service Manual
No
Go to step 2.
Problem
solved.
Replace the
toner sensor
assembly.
Go to step 5.
Replace the
toner harness
assembly 1.