IBM 4846-545 Service Guide - Page 73

System-board, jumper, location, settings, battery, removing, replacing

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Removing and replacing FRUs System-board jumper location and settings Figure 28 shows the system-board jumper locations. See the following topics for jumper descriptions and information about jumper settings. A Figure 28. System board jumper location Table 14 describes the system board jumper setting. All jumper pins have the pin number printed on the system board for easy identification. Table 14. System board jumper settings Jumper Default pin location: Description J25 pins 1 and 2 CMOS Memory clear: To clear the CMOS, momentarily place the jumper on pins 2 and 3 Note: Pin 1 is indicated by a notched corner in the silkscreen. System-board battery - removing and replacing 1. Switch OFF the power to the SurePOS 500. Unplug the power cord from the external power source. 2. Remove the rear cover as described at "Rear cover removal" on page 30. 3. Remove the power supply. See "Power supply - removing and replacing" on page 45 4. Remove the I/O tailgate as described in "Rear connector panel (tailgate) - removing and replacing" on page 47 Chapter 3. Removing and replacing FRUs for the SurePOS 500 Models 545 and 565 51

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System-board
jumper
location
and
settings
Figure
28
shows
the
system-board
jumper
locations.
See
the
following
topics
for
jumper
descriptions
and
information
about
jumper
settings.
Table
14
describes
the
system
board
jumper
setting.
All
jumper
pins
have
the
pin
number
printed
on
the
system
board
for
easy
identification.
Table
14.
System
board
jumper
settings
Jumper
Default
pin
location:
Description
J25
pins
1
and
2
CMOS
Memory
clear:
To
clear
the
CMOS,
momentarily
place
the
jumper
on
pins
2
and
3
Note:
Pin
1
is
indicated
by
a
notched
corner
in
the
silkscreen.
System-board
battery
–
removing
and
replacing
1.
Switch
OFF
the
power
to
the
SurePOS
500.
Unplug
the
power
cord
from
the
external
power
source.
2.
Remove
the
rear
cover
as
described
at
“Rear
cover
removal”
on
page
30.
3.
Remove
the
power
supply.
See
“Power
supply
–
removing
and
replacing”
on
page
45
4.
Remove
the
I/O
tailgate
as
described
in
“Rear
connector
panel
(tailgate)
–
removing
and
replacing”
on
page
47
A
Figure
28.
System
board
jumper
location
Removing
and
replacing
FRUs
Chapter
3.
Removing
and
replacing
FRUs
for
the
SurePOS
500
Models
545
and
565
51