IBM 4840-544 Service Guide - Page 79

cable, removing, replacing

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August 3, 2006 LED card and cable LED card and cable - removing and replacing Note: When replacing the LED card, make sure you replace with the correct part number. On some models, the LED card includes a presence sensor. 1. Switch OFF the power to the SurePOS 500 Models 5x3 and 544/564. Unplug the power cord from the external power source. 2. Remove the front cover as described at "HDD cover and speaker panel - removing and replacing" on page 36. 3. Disconnect the speaker cable and sensor cable from the LED card. 4. Remove the two screws from the LED card (see Figure 32) and remove it. 5. This step is required only if the LED card cable is to be replaced To remove the LED cable: a. Remove the back cover as described at "Rear cover - removing and replacing" on page 38. b. Remove the power supply as described at "Power supply - removing and replacing" on page 57. c. Unplug the cable from the system board and pull it out from the front of the machine. Figure 32. LED card and cable, presence sensor To replace, reverse these procedures. If a presence sensor is present it must be calibrated. See "Calibrating the presence sensor (Models 563, 564, 573, and 5A3 only)" on page 54. Chapter 4. Removing and replacing FRUs for the SurePOS 500 Models 5x3 and 544/564 53

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LED
card
and
cable
–
removing
and
replacing
Note:
When
replacing
the
LED
card,
make
sure
you
replace
with
the
correct
part
number.
On
some
models,
the
LED
card
includes
a
presence
sensor.
1.
Switch
OFF
the
power
to
the
SurePOS
500
Models
5x3
and
544/564.
Unplug
the
power
cord
from
the
external
power
source.
2.
Remove
the
front
cover
as
described
at
“HDD
cover
and
speaker
panel
–
removing
and
replacing”
on
page
36.
3.
Disconnect
the
speaker
cable
and
sensor
cable
from
the
LED
card.
4.
Remove
the
two
screws
from
the
LED
card
(see
Figure
32)
and
remove
it.
5.
This
step
is
required
only
if
the
LED
card
cable
is
to
be
replaced
To
remove
the
LED
cable:
a.
Remove
the
back
cover
as
described
at
“Rear
cover
–
removing
and
replacing”
on
page
38.
b.
Remove
the
power
supply
as
described
at
“Power
supply
–
removing
and
replacing”
on
page
57.
c.
Unplug
the
cable
from
the
system
board
and
pull
it
out
from
the
front
of
the
machine.
To
replace,
reverse
these
procedures.
If
a
presence
sensor
is
present
it
must
be
calibrated.
See
“Calibrating
the
presence
sensor
(Models
563,
564,
573,
and
5A3
only)”
on
page
54.
Figure
32.
LED
card
and
cable,
presence
sensor
LED
card
and
cable
August
3,
2006
Chapter
4.
Removing
and
replacing
FRUs
for
the
SurePOS
500
Models
5x3
and
544/564
53