2-88 Service Manual
5060-4xx
3
Go to “BASE SENSOR TEST” on page 3-30 and
check the cyan TMC sensor. When you press the TMC
pin in the cyan cartridge contact assembly make sure it
actuates the TMC switch on the developer HVPS.
When the TMC pin is pressed in you hear a click when
the switch actuates. Check for mechanical interference
between the contact block and the developer HVPS.
Note: You may need to turn the printer off to hear the
click.
Does the cyan TMC switch on the developer HVPS
board actuate properly when the TMC pin is pressed?
Replace the
cartridge.
Go to step 4
4
Check the developer HVPS board to make sure it is not
cracked or broken.
Is the developer HVPS cracked or broken?‘
Go to step 6 Go to step 5
5
Check the mounting of the developer HVPS. Make sure
the screws that mount the power supply are properly
tightened down and the board is positioned and
mounted correctly.
Is the developer HVPS mounted correctly?
Replace the
developer HVPS
assembly.
If the board is
incorrectly
installed, install it
correctly. Make
sure all the
mounting screws
are tightened
down. Recheck
the printer to see
if a 940 Error is
still displayed.
6
Make sure the developer HVPS cable is correctly
installed on the developer board assembly.
Is the cable correctly installed?
Go to step 7 Correctly connect
the cable.
7
Make sure the developer HVPS cable is correctly
installed at J14 on the system board.
Is the cable properly installed?
Go to step 8 Correctly connect
the cable.
8
Check the voltage at connector J14-11 on the system
board while pressing the cyan TMC pin in the cartridge
contact assembly.
Does the voltage change when the pin is pressed?
Replace the
“System board”
on page 4-72.
Go to step 9
9
Check the voltage at connector J14-11 when the cyan
TMC switch is pressed.
Does the voltage measure approximately +3.3 V dc?
Go to step 10 Go to step 11
10
Check the developer HVPS to system board cable for
damage, broken connections, or wire and shorts
between adjacent pins.
Are there any signs of damage to the cable?
Replace the
cable.
Replace the
“Developer
HVPS board” on
page 4-31.
11
Disconnect the developer HVPS cable from connector
J14 on the system board. Measure the voltage on
connector J14-11 on the system board.
Does the voltage measure approximately 0 V dc?
Replace the
“System board”
on page 4-72.
Replace the
developer HVPS
and developer
HVPS to system
board cable.
Step Actions and questions Yes No
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