IBM 4800-741 Hardware Service Guide - Page 67

Removing, riser

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Updated July 14, 2008 Note: For Models 742 and 782, disconnect the connector from the processor power cable (see A in Figure 37 on page 48). 5. Disconnect all cables. 6. See Figure 36 on page 48. Remove the screws ( Q ) holding the power supply to the housing. 7. Lift to remove the power supply from the unit. 8. To replace the power supply, reverse these procedures. Removing the riser card To remove the riser card: 1. Follow the instructions in "Removing the covers" on page 29. 2. Follow the instructions in "Removing the top plate" on page 32. P Figure 38. Removing feature cards 3. See Figure 38 to locate any installed feature cards and retaining screws ( P ). Remove the screws and pull outward to remove the feature card. 4. Follow the instructions in "Removing the spline" on page 41. Chapter 2. Removal and replacement procedures 49

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Note:
For
Models
742
and
782,
disconnect
the
connector
from
the
processor
power
cable
(see
±A²
in
Figure
37
on
page
48).
5.
Disconnect
all
cables.
6.
See
Figure
36
on
page
48.
Remove
the
screws
(
±Q²
)
holding
the
power
supply
to
the
housing.
7.
Lift
to
remove
the
power
supply
from
the
unit.
8.
To
replace
the
power
supply,
reverse
these
procedures.
Removing
the
riser
card
To
remove
the
riser
card:
1.
Follow
the
instructions
in
“Removing
the
covers”
on
page
29.
2.
Follow
the
instructions
in
“Removing
the
top
plate”
on
page
32.
3.
See
Figure
38
to
locate
any
installed
feature
cards
and
retaining
screws
(
±P²
).
Remove
the
screws
and
pull
outward
to
remove
the
feature
card.
4.
Follow
the
instructions
in
“Removing
the
spline”
on
page
41.
P
Figure
38.
Removing
feature
cards
Updated
July
14,
2008
Chapter
2.
Removal
and
replacement
procedures
49