Xerox 3050 Service Manual page 368

CQ 30 Erase Lamp
(W/ 0 Tag/ MOD 30) RAP
This RAP is used for copy quality problems
related to the loss of light intensity from the
Photoreceptor Drum Erase Lamp. Copiers
equipped with an Erase Lamp are identified
as being without Tag 30 (Wl 0 Tag1 MOD 30).
Initial Actions
Switch off and unplug the copier.
0
Ensure that all connectors are
correctly seated.
Ensure that the Erase lamp i s clean
and properly installed.
Procedure
Set the Multimeter to measure
+
26 VDC.
Connect the
(
-
) lead to GND.
Plug i n and switch on the copier
There is
+
26 VDC at Pin 12 of A2 P203 of the
LVPS PWB (A2).
There
is
+
26 VDC
at
Pin 11
of
A2 P203.
Y N
Replace the LVPS PWB (A2).
Go t o FLAG 1 and check for open or short
circuits in the wires. If the wiring is OK,
replace the Power Inverter.
Enter the diagnostic code [0966] while
observing the meter.
The voltage at Pin 12 of (A2 P203) changes
from approximately ( + 26 VDC) to less than
(1 .O VDC).
Y
N
I
Replace the LVPSI Driver (A2) PWB.
If the problem persists, replace the
1
Controller PWB (A)).
The Erase Lamp illuminates.
Y N
There is 100 t o 120 VAC between Pins 1 and
3of A2Pl.
Y N
I
Replace the Power Inverter.
Go t o FLAG 2 and check the wiring for an
open circuit in the wires.
If the wiring is OK, replace the Erase lamp.
If the problem persists, replace the
Controller PWB.
If the problem persists, replace the LVPS
PWB (A2).
Ensure that the Erase LED'S are clean, then go to
ADJ. 9.2 and check that the Electrostatic Series
of Adjustment settings are in specification.
Run 5 copies of Test Pattern 82E5980 and check
that the copy quality is in specification
.
121 97
CQ 30 Erase Lamp (WI 0 Tag/ MOD 30) RAP
3-84
3050