Diagnostics and troubleshooting
 
264
 
Step 3
 
Perform the auto alignment service check. See 
“Auto alignment 
service check” on page 265
.
 
 
Does the problem remain?
 
Step 4
 
a 
Enter the Diagnostics menu, and then navigate to:
 
Printer setup 
> 
EP setup 
> 
Toner  patch sensor adjust  
b   
On the sensor gain characterization row, touch 
Start
.  
c 
On the sensor gain verification row, touch 
Start
.
 
d 
On the sensor gain verification section of the test page, check 
the average signal values of the patch number.
 
 
Are the values within the requirement?
 
Step 5
 
a
 
Remove the imaging kit.
 
b
 
Move the TPS wiper mechanism lever up and down.
 
 
Does the wiper mechanism properly move?
 
Step 6
 
a
 
Reinstall, repair, or replace the TPS sled and wiper  mechanism.
 
b
 
Perform the auto alignment service check. See 
“Auto 
alignment service check” on page 265
.
 
 
Does the problem remain?
 
Step 7
 
Check the cable on the sensor (TPS) and on the JTPSAA1 
connector on the controller board for proper connection, and 
reseat if necessary.
 
 
Does the problem remain?
 
Step 8
 
a
 
Replace the sensor (TPS). See 
“Sensor (TPS) removal” on 
page 362
.
 
b
 
Enter the Diagnostics menu, and then navigate to:
 
Printer setup 
> 
EP setup 
> 
Toner  patch sensor adjust  
c   
On the sensor gain characterization row, touch 
Start
.  
d 
On the sensor gain verification row, touch 
Start
.
 
e 
On the sensor gain verification section of the test page, check 
the average signal values of the patch number.
 
 
Are the values within the requirement?
 
Contact the next 
level of support.