Dc Power Rap - Xerox 2510 Service Manual

1.2 DC
Power RAP
Procedure
A B C
This RAP is used for problems related t o the
loss of all or part of the DC Power.
Q
The
+
5V and
+
15V LEDs, when lit,
indicate that DC voltage is available
on the L VPS PWB.
Initial Actions
Ensure that the connectors PIJ 4, and
PIJ
9, are connectedlseated properly.
(2510 Only): If
the Fuse (F1)
is
failing
intermitently, check that the
thermistor PWB cover is i n place on
the bottom of the thermistor PWB.
This
prevents the oiler assembly from
touching the termistor PWB.
If another copier is on the same
electrical circuit, the cycling of
i t s
fuser may cause the fuse t o fail. An
indication of another copier is a
251
O I X I
5 transformer noise (hum)
whon tho copiors is in tho Rost mode.
The
+
5V
and
+
15V LEDs
on the low voltage
power supply are lit.
Set
the DMM to read AC. Connect the
DMM to PIJ 4 Pins 1 and 4.
-
ACH is present.
Y N
Ensure the Fuse F1 on the LVPS is not
open. The Fuse is open.
.
-
I
Replace the L w s PwB.
50
t o FLAG 1 and check for a short
circuit. Replace the Fuse (F1) and
disconnect P1J9. Set the DMM
Set the DMM t o the ZOO VDC range. Conned
read and
'OnneCt
the meter
(-1
to the GND test point on the HVPS and
leads from
' I J 4
pin
to ' I J 4
pin
measure the following LVPS voltages:
There is 22 t o 2 5 VAC.
I
Reconnect
PIJ
9.
If the problem persists replace the
Controller PWB (A3).
Connect the meter leads from PlJ4 pin
6
t o PlJ4 pin 10. There is
22
t o 25
VAC.
Y N
I
Replace the Transformer (PL 1.2).
Disconnect PIJ 9.
The
+
5V
and
+
15V
LEDs on the low
voltage power supply are
lit.
Y N
I
Replace the LVPS PWB (A2).
Replace the Controller PWB (A3).
I
Reploco tho Transformor (PL 1.2).
PIJ9Pin 14
=
+
15VDC
C
P/J9Pin12=
+
24VDC
PIJ 9 Pin 3
=
+
10VDC (4.2.5 t o
+
14
VDC)
If any voltage i s missing, go t o FLAG 1 and
check lor and open circult, II thore i s no
open circuit replace the Low Voltage Power
Supply PWB (A2).
8/96
2 ~ 1 0 1 2 ~ 1 ~ 2-47
1.2 DC power RAP