Xerox 3050 Service Manual page 190

11.50 Bulk Power Supply RAP
This
RAP
is used when a fault has occurred in
the 26 VDC Bulk Power Supply.
NOTE: The circuit diagram and the
component locator drawings are on the
following pages.
Initial Actions
A
WARNING
Dangerous Voltage.
Ensure that Connectors
A4P1
and
A4P2 on the 26 VDC Bulk Power
Supply are correctly installed and fully
seated.
Ensure that Fuse F U Z on the 26 V D C
Bulk Power Supply has continuity. If
not, the power supply has an internal
fault. Replace the power supply.
Before troubleshooting, ensure that
all
AC
Interlocks are closed. A,n open
lnterlock will cause the Main Power
relay t o open. Check the Document
Handler Left End Cap for damage that
might cause the Document Handler
lnterlock to be partially actuated.
Procedure
Switch on the copier. There is
26
V D C at
A4PlJ210 Pins
1
and 2 .
Set the DMM to read ACH. There Is ACH
between A4Plll Pins 2 end 3.
Switch off the copier. GO TO FLAG 1
and check for a open circuit. If there is
no open circuit, go to the 1.4 Main
Power lnterlock RAP.
There is 26 VDC at A4PIJ2 Pins 1 and 2.
I
Replace the
26
V D C Bulk Power Supply.
GO
to FLAG 2 and check the wiring for an
open circuit. If there is no open circuit
replace the LVPSIDriver PWB
(A2).
Replace the LVPSI Driver PWB (A2). If the
problem persists replace the Controller PWB.
8/94
11.50 Bulk Power Supply RAP
2.102 3050