Main Wire Harness Test Diagnostic - Printronix P7000 Series Maintenance Manual

Main Wire Harness Test Diagnostic

This is a procedure for extended testing of various printer components.
1. Prepare the printer for maintenance (page 230).
2. Cabinet Models: Remove the paper path (page 303).
3. Disconnect cable connectors P106 and P107 from the controller board.
4. Refer to the Main Wire Harness Test Tables on page 398 as you do the
NOTE: If you have a 60-pin expansion-CT adapter that was used on the old
5. Shuttle Motor test:
NOTE: A number of "intermediate" cables in the printer can be disconnected
Pedestal Models: Remove the top cover assembly (page 281).
following substeps:
a. Measure the resistance of the device(s) specified in the procedure
you are working.
CMX and CFX controller boards, 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.
b. 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.
c. Replace any defective devices.
a. Remove the ribbon.
b. Remove the shuttle cover assembly (page 280).
c. Disconnect cable P02
d. 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.
e. Replace the shuttle frame assembly if you find any shorts.
at both ends and tested using the Cable Shorts Test (page 261):
•
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
Adjustments and Tests
263