Diagnostic information 2-109
5060-4xx
Step D
Black only retract (BOR) service check
Step Action and questions Yes No
1 Enter the Diagnostics Mode and select INPUT TRAY
TESTS, Sensor Test, and Tray 1. You can activate the
paper level sensor inside the printer. The paper level
sensor is a dual sensor and checks the following levels
for Tray 1.
The Tray 1 level sensor is a dual sensor assembly that
senses when tray 1 is empty, nearly empty, or partially
empty.
Does the Sensor Test pass?
Call your next
level support
Go to step 2
2
Paper level sensing assembly - Make sure the
assembly is not loose or damaged. Make sure the
bellcrank is not broken.
Are any parts loose or broken?
Repair or replace
parts as
necessary
Go to step 3
3
Check the paper level sensing cable for correct
installation at J25 on the system board and to the
paper level sensing dual sensor assembly.
Is the cable connected correctly?
Go to step 4 Install the cable
correctly
4
Check the paper level sensing assembly flag for correct
installation and the flag is not broken or damaged.
Is the paper level sensing assembly installed correctly
and the flag not broken or damaged?
Go to step 5 Install correctly or
replace the flag if
damaged or
broken
5
Check continuity of the paper level sensing cable.
Is there continuity?
Go to step 6 Replace the level
sensing cable
6
Check the voltage at J25. It should measure
approximately +5 V dc.
Is the voltage correct?
Replace the level
sensing
assembly
Replace the
“System board”
on page 4-72
Step Action and questions Yes No
1 Using the toggle ITU function in diagnostics Mode, test
the BOR system. Remove the print cartridges and
watch the belt while activating the toggle function.
Does the ITU belt move up and down when the ITU is
toggled?
Go to “Print
quality service
check” on
page 2-130.
Go to step 2
2
Remove the ITU. Locate the BOR gear and manually
activate the gear. Verify that the front and back BOR
cams are moving the respective bell cranks.
Do the cams move back and forth properly?
Replace in the
following order:
1. “BOR drive
assembly”
on
page 4-28.
2. “System
board” on
page 4-72.
Determine which
component is
preventing the
proper
movement.
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