Sun Microsystems Netra t1 Series Addendum

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Addendum
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Netra t1 4-Stack Memory Upgrade
Addendum
Part No. 806-5606-10
June 2000, Revision A
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1
Installing Four 256 Mbyte Memory
Boards
This document tells you how to install a stack of four 256 Mbyte memory boards
into the Netra t1 system. If you want to install a single additional 256 Mbyte
memory board, follow the instructions in the Netra t1 Systems Memory Upgrade
document (part number 806-2129-11).
Note – Do not install memory boards in stacks of three. If you do not want to install
boards in a 4-stack configuration, you can install them in single-board or 2-stack
configurations. In a 2-stack configuration, you can combine Netra t1 memory boards
of different capacities (64, 256, or 512 Mbytes).
This document contains the following sections:
“Materials and Tools Required” on page 2
“Wearing an Anti-Static Wrist Strap” on page 3
“Installing the Stack of Four Boards” on page 4
!
2 Netra t1 4-Stack Memory Upgrade: Addendum June 2000
Materials and Tools Required
Note The boards you must use for the 4-stack memory installation have the part
number 370-4155. Other 256 Mbyte memory boards (those with part numbers 370-
4096 and 595-5097) cannot be included in a 4-stack configuration. The boards you
must use are identifiable by a sticky label saying ‘4-stack only’.
The packaging containing your 4-stackable 256 Mbyte memory board includes a kit
(part number 540-4532-02) containing the following (see
FIGURE 1):
Four square spacers
Four lock washers
Four flat washers
Four long screws (11/16 inch; required only for 4-stack configurations)
Four round plastic spacers (required only for 2-stack configurations)
Four short screws (3/16 inch; required only for single-board configurations)
Four medium length screws (3/8 inch; required only for 2-stack configurations)
To install a stack of four boards, you need four memory board packages. To order a
single package from your Sun Enterprise Services representative, quote the sales part
number X6985A.
FIGURE 1 The 4-Stackable Memory Board Kit
!
4 square spacers
Label:
4 stack
ONLY
4 long screws
(11/16 inch)
Memory board
4 lock washers
4 flat washers
4 round spacers
4 short screws
(3/16 inch)
4 medium length
screws (3/8 inch)
Installing Four 256 Mbyte Memory Boards 3
Wearing an Anti-Static Wrist Strap
Caution – The Netra t1 system contains electronic parts that are extremely sensitive
to static electricity. Do not touch any metal parts. Wear an anti-static wrist strap
connected to an earthing point before you open the system.
FIGURE 2 Preparing to Open the System Wearing an Anti-Static Wrist Strap
1
The anti-static
wrist strap must be
connected to an
earthing point
4 Netra t1 4-Stack Memory Upgrade: Addendum June 2000
Installing the Stack of Four Boards
1. If your system is new and you have just removed it from its packaging, go straight
to Step 3. If your system is currently in use, then:
a. Shut down Solaris from the console.
b. Turn the power supply switch off.
c. Disconnect the power cord or power cords.
d. Disconnect all other cables.
2. If you have installed the system into a rack or cabinet, remove it.
3. Remove the rack mount brackets from the side of the system (see
FIGURE 3).
FIGURE 3 Removing the Rack Mount Brackets from the Side of the System
4. Place the unit at an ESD station and make sure you are wearing an anti-static
wrist strap connected to an earthing point.
Installing Four 256 Mbyte Memory Boards 5
Caution Before attempting to remove the top cover of the Netra t1 system, make
sure that all power cords and all other cables have been disconnected.
5. Remove the system’s top cover (see
FIGURE 4). To do this:
a. Remove the screw at the rear center of the unit.
b. Slide the top cover back and lift it off.
FIGURE 4 Removing the Top Cover of the Netra t1 System
1
2
2
3
5a
5b
6 Netra t1 4-Stack Memory Upgrade: Addendum June 2000
6. Lift out the processor cover located in the rear center of the unit (see FIGURE 5).
Make sure you slide the processor cover tabs from under the rear I/O card before
lifting the processor cover away from the system.
FIGURE 5 Lifting out the Processor Cover
Tabs
Installing Four 256 Mbyte Memory Boards 7
7. Using a Phillips No.1 screwdriver, remove the screws and washers from the base
memory board (see
FIGURE 6).
If you intend to replace the base memory board, lift out the board that is currently
installed. Otherwise, leave the current board seated in the connectors on the
motherboard but not screwed in.
Note If you are making a 4-stack (1 Gbyte) configuration, the base board and all
other boards in the stack must be of part number 370-4155.
For purposes of illustration, the board you use as the base board will be called Board
A, Board B will be the board you put on top of Board A, Board C will be the one you
put on top of Board B, and Board D will be the one at the top of the stack.
FIGURE 6 Removing the Mounting Screws from the Currently Installed Memory Board
!
Memory Board
Remove short screws
8 Netra t1 4-Stack Memory Upgrade: Addendum June 2000
8. If you are replacing the currently installed base memory board, align the
connectors of the new base board with the memory board sockets on the Netra t1’s
motherboard.
Press home fully the connectors using your thumbs. The connectors need to be
properly seated (see
FIGURE 7). You might find it helpful to seat the middle connector
properly before the other two connectors.
FIGURE 7 Seating a Single Memory Board on the Netra t1’s Motherboard
Caution Although it is necessary for the connectors to be properly seated, you
must not apply excessive pressure to them. If you do, you might cause micro-
fractures on the motherboard which can impair the operation of the board.
9. Position the connectors of one memory board (Board C) above the memory board
connector sockets of another memory board (Board B) in a piggy-back style, then
press down the connectors using your thumbs until they are seated.
You might find it helpful to seat the middle connector properly first. See
FIGURE 8.
Put together Boards B and C first, before you connect them to Board A.
Caution Place the memory boards on ESD foam during this assembly.
Board A
Motherboard
!
!
Installing Four 256 Mbyte Memory Boards 9
FIGURE 8 Stacking the Third Memory Board on Top of the Second
10. Insert the four plastic spacers and align them with the mounting holes on memory
Boards B and C (see
FIGURE 9).
FIGURE 9 Aligning the Four Plastic Spacers with the Mounting Holes
Board B
ESD foam
Board C
Spacers
10 Netra t1 4-Stack Memory Upgrade: Addendum June 2000
11. Carefully transport the memory boards (Boards B and C) with spacers onto
Board A (see
FIGURE 10).
Follow the procedure described in Step 9 to mount the assembled Boards B and C
(with spacers inserted) onto memory Board A.
Hold the spacers, if necessary, so that they do not move out of position.
FIGURE 10 Mounting the Second and Third Boards onto the Base Memory Board
Board B
Board C
Board A
Installing Four 256 Mbyte Memory Boards 11
12. Align the connectors of Board D to the sockets of Board C, but do not press down
yet to seat Board D (see
FIGURE 11).
FIGURE 11 Four Stacked Memory Boards on the Netra t1 Motherboard
Board D
12 Netra t1 4-Stack Memory Upgrade: Addendum June 2000
13. Insert each screw into one lock washer and one flat washer, then drop the screws
(with the washers) into the aligned mounting holes of the memory boards and the
plastic spacers (see
FIGURE 12).
FIGURE 12 Dropping the Screws into the Aligned Mounting Holes
14. Using your fingers, turn all four screws until they take up just the first one or two
threads in the metal hex standoffs (see
FIGURE 12)
This helps to align the connectors of Board D with the sockets of Board C,
preventing any sideways movement of the stack when you press home the
connectors of Board D.
15. Now press home fully the connectors of Board D. You might find it helpful to seat
the middle connector properly before the other two connectors.
16. Tighten the screws into the metal hex standoffs so that the stack sits firmly on the
motherboard.
Tighten each screw a little at a time to avoid bending and possibly damaging any of
the boards. (The recommended tightening torque is 0.3 Nm.)
17. Replace the processor cover which you removed in Step 6.
Make sure that you put the tabs on the processor cover back into their original
position underneath the rear I/O card.
Lock
washer
Screw
Flat
washer
Metal hex standoff
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Sun Microsystems Netra t1 Series Addendum

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