1.4 Ground Fault Rap - Xerox 3001 Service Manual

1.4 Ground Fault RAP
This RAP is used t o locate and repair ground
faults in the primary AC power distribution
circuitry. You were directed t o this RAP from
another AC power RAP that traced the loss
of AC power t o the GFP device.
The copier is equipped with an inline Ground
Fault Protection (GFP) device (Located on the
power cord) that detects excessive current
leakage t o ground. If excessive leakage is
detected the GFP device will remove all
power t o the copier.
Initial Actions
Check that the correct voltage is being
applied t o the copier at the wall
outlet.
Procedure
L
-
DANGEROUS VOLTAGE.
0
Do n o t disconnect any plugs or wires while
the power cord is plugged into the wall and
the main power switch is on.
The Ground Fault Protector is in the tripped
Position (red flag is not up).
Go t o FLAG 1 and check that the correct
voltage is present. The voltage is correct.
I
Replace the Power On/Off Switch (PL
GO
t o the
1.1
AC Power RAP.
A
Refer t o FLAG
1
and disconnect ACH and ACN
at Pins 2 and 5 of the Power OnIOff Switch.
Plug in the power cord and test the GFP
according t o the Warning label. The GFP
passes the test.
Y
N
I
Replace the GFP (PL 1.3).
Reconnect ACH and ACN wires t o the Power
On/Off Switch. Go t o FLAG 2 and check that
the correct voltage is present. The voltage is
correct.
Y N
1
Go t o the 1.1 AC Power RAP.
Go t o FLAG 3 and disconnect the wires t o the
Line Filter at the Line Filter. The GFP trips
(red flag is not up) after the Power OnlOff
Switch is'turned on.
N
Reconnect the wires t o the Line Filter.
Set the DMM t o the 20K resistance scale.
Switch off the Power On/Off Switch and
unplug the power cord.
Go t o the F1 Fuser RAP and check for a
high resistance path from ACH or ACN
t o Ground. Look for pinched wires or
wireswith frayed insulation. If the
problem persists go t o the OF1 Media
Heater RAP and check for a high
resistance path from ACH or ACN t o
Ground. Look for pinched wires or wires
with frayed insulation. The GFP trips
(red flag is not up) after the Power
OnIOff Switch is turned on.
I
Proceed t o wrap up the call.
Disconnect Pins 7 and 5 of connector P2
at the LVPS PWB. The GFP trips (red flag
is not up) after the Power On/Off Switch
is turned on.
Y N
I
Proceed t o wrap up the call.
Replace the
LVPS
PWB (PSI).
teplace the Line Filter (PL 1.2).
1.4 Ground Fault RAP