2-80
Service Manual
5061
Step D
Black only retract (BOR) service check
Step
Actions 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?
Contact your next
level of 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 JTRAY1 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 that 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 JTRAY1. It should measure
approxi5 V dc.
Is the voltage correct?
Replace the level
sensing
assembly.
Replace the
system board.
See
“System
board removal”
on page 4-90
.
Step
Actions 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
quality service
check” on
page 2-95
.
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
removal” on
page 4-34
.
2.
“System
board
removal” on
page 4-90
.
Determine which
component is
preventing the
proper
movement.
Summary of Contents for C77X
Page 15: ...Notices and safety information xv 5061...
Page 16: ...xvi Service Manual 5061...
Page 22: ...xxii Service Manual 5061...
Page 44: ...1 22 Service Manual 5061...
Page 182: ...2 138 Service Manual 5061...
Page 293: ...Repair information 4 61 5061 6 Release the MPF latch F and remove the MPF...
Page 325: ...Repair information 4 93 5061 3 Remove all connectors C 4 Remove the transfer HVPS board...
Page 338: ...4 106 Service Manual 5061...
Page 339: ...Connector locations 5 1 5061 5 Connector locations Locations Printer boards...
Page 340: ...5 2 Service Manual 5061 Printer motors...
Page 341: ...Connector locations 5 3 5061 Printer sensors...
Page 342: ...5 4 Service Manual 5061 Cartridge contact assembly pin locations cyan magenta and yellow...
Page 343: ...Connector locations 5 5 5061 Cartridge contact assembly pin locations black...
Page 345: ...Connector locations 5 7 5061 Connectors System board...
Page 358: ...5 20 Service Manual 5061 Transfer high voltage power supply HVPS...
Page 368: ...5 30 Service Manual 5061...
Page 372: ...6 4 Service Manual 5061...
Page 380: ...7 8 Service Manual 5061 Assembly 3 1 Fuser web oiler 1 3 2...
Page 402: ...7 30 Service Manual 5061 Assembly 22 Electronics 3 3 3 2 1...
Page 404: ...7 32 Service Manual 5061 Assembly 22 1 Electronics 3 5 4 8 1 9 10 2 2 6 6 6 7 6 6...
Page 408: ...7 36 Service Manual 5061 Assembly 23 Electronics cabling interconnections 1...
Page 410: ...7 38 Service Manual 5061 Assembly 24 Electronics cabling interconnections 2...
Page 420: ...7 48 Service Manual 5061 Assembly 28 1 5 Bin mailbox 3 3 3 3 11 7 13 5 9 2 10 6 4 12 8 14 1 15...
Page 422: ...7 50 Service Manual 5061 Assembly 29 500 Sheet drawer option 3 11 7 5 9 2 10 6 4 8 1...
Page 438: ...7 66 Service Manual 5061 Assembly 33 Envelope option 2 1...
Page 442: ...7 70 Service Manual 5061 Assembly 36 Options...
Page 444: ...7 72 Service Manual 5061...
Page 450: ...B 2 Service Manual 5061 Print Quality Pages Page 1 total of five...
Page 451: ...Appendix B Print quality samples B 3 5061 Print Quality Pages Page 2 total of five...
Page 452: ...B 4 Service Manual 5061 Print Quality Pages Page 3 total of five...
Page 453: ...Appendix B Print quality samples B 5 5061 Print Quality Pages Page 4 total of five...
Page 458: ...B 10 Service Manual 5061...
Page 466: ...I 8 Service Manual 5061...
Page 476: ...I 18 Service Manual 5061...
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