IBM 4851 514 Service Guide - Page 84

Memory, modules, removing, replacing, Power, supply

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Removing and replacing FRUs Updated October, 2008 Table 10. System board jumper settings Jumper Default pin location: Description JP1 Pins 1, 2, and 3 (Located beside battery A) CMOS Memory clear. To clear CMOS, momentarily place the jumper on pins 2-3 Note: Pin 1 is indicated on all jumpers by a small white circle. System-board battery - removing and replacing 1. Switch OFF the power to the SurePOS 500 Model 514. Unplug the power cord from the external power source. 2. Remove the back cover as described at "Rear cover - removing and replacing" on page 61. 3. Remove the rear inner metal cover. See "Rear metal panel cover - removing and replacing" on page 62. Figure 53. Battery location 4. See Figure 53 and locate the system battery ( A ) on the system board. Using a flat-bladed screwdriver, carefully pry the battery from its housing. 5. To replace, align the battery with the housing and push into place Memory modules - removing and replacing See "Installing the memory modules" on page 6 and reverse the procedures to remove. Power supply - removing and replacing 1. Switch OFF the power to the SurePOS 500 Model 514. Unplug the power cord from the external power source. 68 SurePOS 500 Model 514

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Table
10.
System
board
jumper
settings
Jumper
Default
pin
location:
Description
JP1
Pins
1,
2,
and
3
(Located
beside
battery
A)
CMOS
Memory
clear.
To
clear
CMOS,
momentarily
place
the
jumper
on
pins
2-3
Note:
Pin
1
is
indicated
on
all
jumpers
by
a
small
white
circle.
System-board
battery
–
removing
and
replacing
1.
Switch
OFF
the
power
to
the
SurePOS
500
Model
514.
Unplug
the
power
cord
from
the
external
power
source.
2.
Remove
the
back
cover
as
described
at
“Rear
cover
–
removing
and
replacing”
on
page
61.
3.
Remove
the
rear
inner
metal
cover.
See
“Rear
metal
panel
cover
–
removing
and
replacing”
on
page
62.
4.
See
Figure
53
and
locate
the
system
battery
(
±A²
)
on
the
system
board.
Using
a
flat-bladed
screwdriver,
carefully
pry
the
battery
from
its
housing.
5.
To
replace,
align
the
battery
with
the
housing
and
push
into
place
Memory
modules
–
removing
and
replacing
See
“Installing
the
memory
modules”
on
page
6
and
reverse
the
procedures
to
remove.
Power
supply
–
removing
and
replacing
1.
Switch
OFF
the
power
to
the
SurePOS
500
Model
514.
Unplug
the
power
cord
from
the
external
power
source.
Figure
53.
Battery
location
Removing
and
replacing
FRUs
Updated
October,
2008
68
SurePOS
500
Model
514