Lexmark 13P0150 - C 750dtn Color Laser Printer Service Manual page 112

Step A
Step Action and Questions
1
Use the Tray 1 feed test to feed paper from Tray 1. Check to
see if the Pick Rolls are turning?
Note: You can observe the pick rolls by opening the Lower
Jam access door assembly.
Do the Pick Rolls Turn?
2
Check the Autocompensator Pick Rolls for any signs of
contamination or damage to the rolls.
Is there any excessive contamination or damage to the Pick
Rolls?
3
Check the voltages at J73 on the Engine Board.
Are the voltages correct?
Step B
Step Action and Questions
1
Check Tray 1 for any signs of damage to the Pick Arm Lift
Bellcrank activation tabs on the rear of the tray.
Is there any damage to the tray?
2
Check the following parts for any signs of damaged, loose
or missing parts.
* Pick Arm Lift Bellcrank
* Bellcrank Lift Spring
* Tray interlock bellcrank
Are any of the parts broken, loose or missing?
Step C
Step Action and Questions
1
Can you remove Tray 1 from the printer?
2
Open the Lower Jam Access door and carefully lift the
autocompensator assembly until it is in it's upper most
position, and carefully try to remove Tray 1.
Can you remove Tray 1?
2-92
Service Manual
5060-XXX
Yes
Go to step 2
Replace the
Pick Rolls
Always replace
both pick rolls
at the same
time
Replace the
Autocompen-
sator
Assembly
Yes
Replace Tray 1
Repair or
replace parts
as necessary
Yes
Go to step 3
Go to step 3
No
Go to step 3
Go to step 3
Replace the
"Engine
Board" on
page 4-13
No
Go to step 2
Replace the
Autocompen-
sator
Assembly
No
Go to step 2
Determine
what is
causing the
tray to stay in
a locked
position.
Repair as
necessary