Lexmark X502N Operating and safety instructions

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Manual to replace the CPU-fanof the Lexmark x502n
Attention: This manualrefers exclusively to the altered fandistributed by
ProCompSys! Standard-models of this fan can not be operated withthe Lexmark
x502n in this manner!
Note: Arbitrary modification on your device may void the manufacturer's
warranty! In either case disconnect the device from power before opening!
Voltage can remaininelectronic components of a device, even if power is
disconnected. If needed, consult an expert.
1.
Turn device off
and remove any
cables from the rear side.
2.
Remove the screw fixing the side
-
panel
from the rear side.
3.
Remove the side
-
panelbysliding it
to the rear side of thedevice.
4.
Remove the screw fixing the inner metal
-
side-panel.

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5.
Remove the metal-side-panel by
sliding it to the rear side of the
device.
Remove the defective fan's plug
from the jack on the circuit board.
The fan is fixed with 4 screws.
6.
First, remove the
upper
-
right
and
lower-left screws of the fan. The fan
can alreadybe fullyremoved at this
point.
Two spacers remain attached to the
circuit board. Unscrew the two other
spacers from the defective fanand
attach them to the new fan, just as
diagonally arranged.
7.
Attach the new fan back to the two
spacers that remained on the
circuit boardusing the two
remainingscrews.
8.
Due to variation inproduction on behalf
of Lexmark, it is not possible to equip
the replacement-fan witha plug fitting
all lots of this printer model. In particular
cases it might be necessary to make
some little adjustments.
Given the case that plug and jack do not
fit without further ado, you have to...
(continued on next page)

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either a
) cut off the existing plug
from the defective fanand connect/
solder it to the replacement-fan
(pay attention to the polarity:
rednew àblackold,
blacknew àyellowold,
yellownew àredold!)
or b) file offthe replacement-fans's
pluguntilit fits into the jack
oder c) which appears to be the
most feasible solution remove the
plastc jack from the printer's circuit
board, so the plug's dimensions
don't interfere with the jack's
housing anymore.
If a modification is necessary in
your case, solution No. c) is
depicted below.
If plug and jack do fit without
further ado in your case, you
can skip the following instruct-
tions of this manual, that are
highlighted on a yellow back-
ground.
9.
The white plastic jack is glued to the
circuit boardand can be loosened quite
easily usingp. ex.a pairof long-nosed
pliers.
As soon as the glued connection is
loosened, pull off the white jack-housing
straightforward from the three pin
contacts using slightly circular
movement.
Pay extreme attention to having
powered off the printer and avoid
contact of the used tool with the
circuit board's components!

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10.
The replacement
-
fan's plugcan
now easily be connected to the
contact pins on the circuitboard.
Pay attention to the correct polarity
(red wire to the left)!
("Red wire to the left " also
applies if you did not have to
remove the white plastic jack
from the circuit-board!)
The color-sequence of the
cables of the replacement-fan
does not necessarily have to
coincide with the color-
sequence of the cables of the
defective original fan!
11.
Tentatively connect the printer to
power and switch it on, to check
the new fan's function.
The display-message 'Warning:
CPU Fan is Locked' should be gone
now.
If necessary, check the plug's snug
fit.
12.
Re
-
attach t
he side
-
panels according to
steps 5, 4, 3 and 2.