Dc Cooling Fan Rap - Xerox 2510 Service Manual

1.3 DC Cooling Fan RAP (251 0
WRag 5; 251 5)
This RAP is used when a copier cooling
malfunction is suspected. You may have
been directed here from a CQ RAP or the F1
Fuser
RAP.
The fans are turning at a slower speed
when the copier is in the power saver
mode than when the copier is making
copies.
Initial Actions
Ensure that the connectors PIJ 5, 9,
41, 42, 43,
and
44
are
connectedlseated properly.
r
Check both fans for mechanical'
binding or possible obstruction.
r
Ensure the ozone filters are not
blocked.
Procedure
Both fans are turning while the copier is in
the standby mode.
Set the DMM to the
(
+
) 200 VDC scale.
Connect the DMM
( + )
lead to P/J5-8 and
the
(-)
lead to the ground test point on
the HVPS (TP4). Enter the code
[Jl
to turn
the Cooling fans on.
The voltage goes between
+
19 t o
+
35
+
VDC to less than 0.1 VDC.
I Y N
A B C
C
Set
the DMM to the
(
+
) 20
VDC
scale. Connect the DMM
(
+
)
lead to
PlJ9-7
and the
(-)
lead to the ground
test
point on the HVPS
(TP4).
Enter
the code [J] to turn the Cooling fans
on.
The voltage goes from less than 0.1
VDC to between
+
3.5 to 5.0 VDC
.
Y N
I
Replace the Controller PWB
(A3).
Go to FLAG 1 and check for an open
circuit. If there is no open circuit,
replace the LVPS PWB
(A2).
Replace one or both Fans.
Refer to note
1
and determine if the fans
switch to a slower speed.
The
fans switch to
a
slower speed after
the
copier enters the Power Saver mode.
Y N
Replace the Thermister PWB (A10). If the
problem persists replace the Controller
PWB
(A3).
Return to the RAP that directed you here.