Xerox 3050 Service Manual page 272

H
Set the DMM to read 2 VDC. Connect the
( + ) lead to the G terminal on Triac (Q1).
Connect the
(-)
lead to MT1. Switch off,
then switch on, the copier. Wait 10
seconds.
NOTE: The bargraph display on the
DMM
will flicker
if
pulses are present.
Pulses are present.
Connect the
(
+
)
lead to A2P215-17 on
the LVPSf Driver PWB (A2).
Pulses are present.
Y
N
I
Replace the LVPSl Driver PWB (A2).
kepair the wire between terminal G on
Triac (Ql) and A2P215-17.
Switch off the copier. Disconnect the
Power Cord. Replace Triac (Ql); then
perform the following steps to check
that the ballast resistor circuit is
operating correctly:
Disconnect the wire on terminal
G
on
Triac
(91). Set
the
DMM
to read
60 VAC
(USO) or 120 VAC (RX). Connect the
(
+
)
iead to terminal MT2 on Triac (Q1).
Connect the
(-)
lead to MTI. Connect the
Power Cord and switch on the copier.
The following
AC
voltage is present for
approximately 5 seconds:
at least
60 VAC
(USO)
at least 120 VAC (RX).
Switch off the copier and disconnect
the power cord. Set the DMM to
read
8
to
21
ohms of resistance.
Disconnect the wires on each Ballast
Resistor before measuring the
resistance.
The resistance of each ballast
resistor (R1) and (RZ) is as follows:
7 to 9 ohms (USO)
0
19 to
21
ohms (RX)
M N
,
Replace both resistors.
Go to FLAGS 4 and 5 and check the
wires for continuity.
The wires have continuity.
Y
N
I
Repair the wires.
Set the DMM to read 26 VDC.
Connect the
(
+
)
lead to terminal 1 of
the Ballast Relay (K5). Connect the
(-)
lead to terminal
0.
Connect the
Power Cord and switch
on
the copier.
26 VDC
is present for approximately
5
seconds.
Connect the (
+
)
lead to A2P212-
11.
Connect the
(-)
lead to
AZP212-12.
Switch off, then
switch on, the copier.
26
VDC
is present for
approximately
5
seconds.
Y N
10192
LL.41, LL.45 Fuser Warmup Fault RAP
2-76 3050