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Chapter 4 Main Wire Harness Test Diagnostic
Main Wire Harness Test Diagnostic
This is a procedure for extended testing of various printer components.
1. Prepare the printer for maintenance (page 132).
2. Remove the paper path (page 199).
3. Disconnect cable connectors P106 and P107 from the controller board.
4. Refer to the
Main Wire Harness Test Tables on
page 275 as you do the
following substeps:
a. Measure the resistance of the device(s) specified in the procedure
you are working.
b. If you have an extra 60-pin expansion-CT adapter you can break it
down into a two-row by 10 pin (i.e., a 20-pin) connector, which you
can insert into P106 and P107 for easier electrical measurements.
c. On motors, use the table to test for winding continuity and for no
shorts between windings and motor frame. Rotate the motor by hand
and test for shorts. If you find any shorts in a motor, replace the
motor.
d. Replace any defective devices.
5. Shuttle Motor test:
a. Remove the shuttle cover assembly (page 178).
b. Disconnect cable P02
c. At P02, check for approximately 0.7 Ohms per phase. Use this value
to test for winding continuity and for no shorts between windings and
the motor frame. Rotate the motor by hand and test for shorts.
d. Replace the shuttle frame assembly if you find any shorts.
NOTE: A number of “intermediate” cables in the printer can be disconnected
at both ends and tested using the Cable Shorts Test (page 162):
• Intermediate cables of devices in the Main Wire Harness Test Tables:
Card Cage Fan
Left Ribbon Motor
Right Ribbon Motor
Exhaust Fan (in cabinet models)
Magnetic Pick-up Unit (MPU)
• Shuttle Motor Intermediate Cable
• Hammer Bank Power and Logic Intermediate Cables
• Control Panel Assembly Intermediate Cable
• Power Stacker Logic and Power (Intermediate) Cables
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