A Ground Distribution Rap - Xerox WorkCentre 5687 Series Service Manual

01A Ground Distribution RAP

Use this RAP to identify ground distribution faults.
Procedure
WARNING
Do not switch on the electricity to the machine while a ground circuit is disconnected.
Ground circuits ensure that the machine remains safe during a fault condition.
NOTE: Ground distribution faults must be isolated by continuity checks and visual inspection.
Check all circuits between each connection and ground.
Ground distribution faults can cause the following:
• Image quality faults
• Paper feed faults.
• Paper path faults.
• Random logic faults
To diagnose a suspected ground distribution fault, the following must be considered:
• Ensure that all the connectors are not damaged. Check crimping for suspect electrical
connections or any mechanical failure that could cause a failed or poor electrical contact.
Refer to REP 1.2 for information concerning wiring harness repairs.
• When making a continuity check on a harness, disconnect the harness at both ends, to
ensure that other wiring does not cause continuity readings to be incorrect. Ensure that
any in-line connectors are installed correctly.
• When making a check between connectors and ground, preferably use the main frame
ground connection, Figure 1. Alternatively use any unpainted metal part of the machine
frame.
• Check the ground conductor of the main power cord for continuity or damage, if neces-
sary install a new main power cord, PL 1.10 Item 10.
• Check that the ground connections that follow are secure.
– Figure 1, main frame, main input and auxiliary output ground connections. Check for
continuity of less than 1 ohm between the ground contact of each mains connector
and the main frame ground. Check that the hardware is tight and the harness crimp-
ing is good. To improve continuity, disconnect the terminals, clean the contact faces
and re-assemble.
WorkCentre 5687 Family
Auxiliary output
ground connection
Figure 1 Component location
August 2007
2-11
Main frame ground
connection.
Auxiliary input ground
connection.
Main input ground
connection
Status Indicator RAPs
01A