Toshiba Tecra 750dvd Maintenance Manual

							4/00, Tecra Toshiba TRRPage 12Tecra 750 Series Disassembly Overview
This section explains how to remove Field
Replaceable Units (FRUs). It may not be neces-
sary to remove all the FRUs in order to replace
one.
The chart is a guide to which FRUs need to be
removed in order to remove others.  The section
numbers on the chart refer to the sections in the
Maintenance Manual, Chapter 4.
Always start by removing the battery pack, next,
optional items such as the optional PC card and
optional memory module, then follow the line on
the chart to determine which FRU you must
remove next in order to repair the one you think is
causing the computer to operate improperly. The information offered in this section is an overview of the Maintenance Manual, Chapter 4, Replacement
Procedures.  If you have any questions or concerns regarding the proper procedure please refer to the Mainte-
nance Manual through the Toshiba Service and Support Website before you proceed.
To remove the battery pack, follow the steps
below.
CAUTION: When handling battery packs, be
careful not to short circuit the terminals. Also
do not drop, hit or otherwise apply impact; do
not scratch or break the casing.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Turn the computer upside down with the
front facing you and push the battery
lock up to unlock it. A red dot shows
when the lock is in the unlock position.
3.Pull the battery’s release lever out and
slide it to the left to pop the battery up
slightly.
4.Grasp the battery pack and lift it out.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Make sure the battery release lever is
pulled out, then carefully insert the new
or recharged battery pack.
3.Place your fingers just above two pins
on the battery pack that fit into the
locking mechanisms in the battery
socket. Push the battery pack down
carefully until it locks into place.
4.Push the battery lock down to secure it.
The red dot will be covered. To install the battery pack, follow the steps below.
WARNING: The battery pack is a lithium ion
battery, which can explode if not properly
replaced, used, handled, or disposed of.
Dispose of the battery as required by local
ordinances or regulations. Use only batteries
recommended by Toshiba as replacements.
NOTE: Check the battery terminals visually. If
they are dirty, wipe them clean with a dry
cloth. 
						

							Toshiba TRR4/00, Tecra
Page 13Tecra 750 Series Disassembly Overview, (cont.)
To remove the optional PC card, make sure the
computer is in boot mode, then follow the steps
below.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack.
3.Open or remove the PC card slot cover.
4.Press in slightly on the eject button for
the upper and/or lower card and the
button will pop out fully.
5.Press the button firmly to pop the PC
card out partially.
6.Grasp the PC card and remove it.
7.Close or replace the PC card slot
cover.
To install a PC card, follow the steps below.
1.Open or remove the PC card slot cover.
2.Insert the PC card and press gently to
ensure a firm connection.
3.Close the slot’s cover or replace the
cover with an appropriate one.
4.Install the battery pack.
To remove the Selectable Bay module, follow
the steps below.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack.
3.Turn the computer upside down and
slide the Selectable Bay lock so that a
red mark appears. If cables are
attached to the computer, be careful not
to put pressure on the cables.
4.Lay the computer back down and pull
out the release lever.
5.Push the release lever in firmly to pop
the Selectable Bay module partially out
of the bay.
6.Grasp the module and pull it out.
CAUTION: The Selectable Bay modules
can become hot with use. Be careful when
removing the module.
Install the Selectable Bay modules as described
below.
1.Verify the Selectable Bay lock is
unlocked.
2.Insert the module in the computer and
press until it locks into place.
3.Fold the release lever into the closed
position.
4.Slide the Selectable Bay lock so that
the red mark is covered.
5.Install the battery pack. 
						

							4/00, Tecra Toshiba TRRPage 14Tecra 750 Series Disassembly Overview, (cont.)
To install the Selectable Bay cover, follow the
steps below.
1.To install the cover, first remove the
Selectable Bay module then hold the
cover by the two finger grips and push it
into place until you hear the latches
click.
2.To remove the cover, grasp the two
finger grips and pull the cover out.
To disassemble the FDD, follow the steps below.
1.Remove six M2x6 silver screws.
2.Turn the FDD over and release two
latches securing the upper plastic
frame and lower plastic frame. Turn it
back over and lift off the cover.
3.Lift off the upper shield cover, unseat
the flexible cable connector from the
lower plastic frame, then lift out the
FDD.
4.Pull the flexible cable out of the FDD
connector.
5.Remove four M2.5x2.8 black screws
and remove the FDD from the bracket.ê
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							Toshiba TRR4/00, Tecra
Page 15Tecra 750 Series Disassembly Overview, (cont.)
To assemble the FDD, follow the steps below.
1.Seat the FDD in the bracket and
secure the bracket with four M2.5x2.8
black screws in the order numbered
on the case. Tighten screws to a torque
of less than 2.2 kgfcm.
2.Insert the flexible cable into the
connector. Press gently to ensure a
firm connection.
3.Seat the FDD in the lower plastic
frame and set the upper shield cover
in place.
4.Seat the flexible cable connector into
the lower plastic frame.
5.Set the upper plastic frame in place,
snap the two latches closed and secure
six M2x6 silver screws.
To disassemble the CD-ROM drive, follow the
steps below.
1.Remove four M2x3 screws and three
M2x6 silver screws securing the frame
to the CD-ROM drive.
2.Slide the drive partially out of the drive
frame.
3.Remove the connector cover and lift out
the flexible cable.
CAUTION: Be very careful not to press on
the top or bottom of the HDD. Pressure can
destroy data or damage the drive.
To remove the HDD pack, follow the steps below.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack.
3.Turn the computer upside down.
4.Slide the cover to the right and push
the HDD pack forward until the back
edge is aligned with a marker next to
the HDD slot.
5.Lift up on the cover to remove the HDD
pack. 
						

							4/00, Tecra Toshiba TRRPage 16Tecra 750 Series Disassembly Overview, (cont.)
To disassemble the HDD Pack, follow the steps
below.
1.After removing the HDD pack, lift the left
end of the cover up.
2.Slide the cover all the way to the right.
3.Lift the cover up and remove it.
4.Remove four M2.5x6 silver screws
from HDD pack.
5.Remove the HDD tray and connector
cover.
6.Remove four M3x4 flat-head screws.
7.Remove the flexible cable.
CAUTION: Do not try to disconnect by
pulling on the flexible cable.
CAUTION: Do not apply pressure to the top
or bottom of the HDD.ê
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							Toshiba TRR4/00, Tecra
Page 17Tecra 750 Series Disassembly Overview, (cont.)
To assemble the HDD pack, follow the steps
below.
1.Connect the flexible cable connector
to the HDD.
2.Seat the HDD into the metal cover and
secure four M3x4 flat-head screws.
3.Connect the connector cover to the
flexible cable connector. When
seating the connector cover, match the
positioning pins to the holes on the
flexible cable and metal cover.
CAUTION: Don’t hold the HDD by its flat sur-
faces. It may damage the HDD.
4.Secure four M2.5x6 silver screws.
5.Mount the cover onto the HDD.
To install the HDD pack, follow the steps below.
1.Align the HDD pack with a marker on
the computer and seat the HDD so that
tabs on the HDD fit into notches on the
computer.
2.Make sure the cover is pushed fully to
the right and push the HDD back to
ensure a firm connection.
3.Slide the cover to the left to lock the
HDD into the slot.
4.Install the battery pack.í
NOTE:  There could be two memory
modules.
5.Grasp the memory module by the sides
and pull it out. CAUTION: Do not try to remove a memory
module(s) with the computer turned on. You
can damage the computer and the memory
module(s).
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack, and HDD.
3.Remove two M2x3 silver screws
securing the memory module socket
cover and remove the cover.
4.Use a slender object to press two
latches on either side of a memory
module to the outside and the memory
module will pop up. To remove the memory module(s), make sure
the computer is in boot mode and follow the
steps below.
CAUTION: Do not touch the connectors on
the memory module(s) or on the computer.
Debris on the connectors may cause
memory access problems.î 
						

							4/00, Tecra Toshiba TRRPage 18Tecra 750 Series Disassembly Overview, (cont.)
To install a memory module(s), make sure the
computer is in boot mode and follow the steps
below.
CAUTION: Do not try to install a memory
module(s) with the computer turned on. You
can damage the computer and the
module(s).
1.Position the connector on the bottom of
the module over the corresponding
connector on the computer. Place your
fingers above the connector and press
firmly but gently to ensure a solid
connection. The module should be
seated level.
CAUTION: Do not touch the connectors on
the memory module(s) or on the computer.
Debris on the connectors may cause
memory access problems.
2.Lay the cover in place and secure it
with two M2x3 silver screws.
3.Install the battery pack, and HDD.í
The modem board is located under the palmrest.
To open the palmrest, follow the steps below.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack, HDD pack,
and optional memory module.
3.With the computer upside down,
remove three M2x8 silver screws and
two M2x22 silver screws.
4.Turn the computer right side up and
open the display panel and the PC card
cover.
5.Grasp the sides of the palmrest and pull
it forward until tabs on either side clear
holes on the top cover.
6.Carefully lift the palmrest to avoid
damage. Three latches are located
under the palmrest as shown below.
7.Remove four M2.5x6 screws in the
modem slot and lift out the modem
pack.
8.Disconnect the modem pack flexible
connector from the system board.î ê 
						

							Toshiba TRR4/00, Tecra
Page 19Tecra 750 Series Disassembly Overview, (cont.)
To install a modem board, follow the steps
below.
1.Place the modem pack and secure the
connector on the modem board to
PJ660 on the system board.
NOTE: Be sure a plastic insulator tab lies on
top of the green backup battery, when you
seat the modem board.
2.Make sure holes in the modem casing
are aligned with screw holes in the
computer and secure the modem board
with four M2.5x6 screws.
3.Lay the palmrest in place and press
down to seat it firmly.
4.Close the PC card slot cover and the
display panel.
5.Turn the computer upside down.
6.Secure two M2x22 silver screws and
three M2x8 silver screws to the
bottom of the computer.
7.Install the battery pack, HDD pack, and
optional memory module.î
To remove the keyboard, follow the steps below.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack, HDD pack,
optional memory module, modem
board, and backup and RTC batteries.
3.Remove the tape and disconnect the
flexible cable from PJ580 on the
system board.
4.Lift up the front edge of the keyboard
and lift it out..
To remove the membrane switch, follow the
steps below.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack, HDD pack,
optional memory module, modem
board, backup and RTC batteries, and
keyboard.
3.Disconnect the membrane switch
cable from PJ570.
4.Remove two M2.5x4 screws securing
the membrane switch unit and lift off the
unit. 
						

							4/00, Tecra Toshiba TRRPage 20Tecra 750 Series Disassembly Overview, (cont.)
To remove the top cover with display assembly,
follow the steps below.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack, HDD pack,
optional memory module, modem
board, backup and RTC batteries,
keyboard, and membrane switch.
3.Remove four M2.5x10 silver screws
from the bottom of the computer. If you
are going to remove the middle frame,
you must also remove one M2x3 silver
screw from the memory slot.
4.Remove one M2.5x4 silver screw and
two M2.5x6 silver screws from the
back of the computer.
5.Turn the computer right side up and
open the display panel.
6.Slightly lift up on the LCD cable cover
and pull forward to remove it. Remove
the plastic lens.
7.Remove one M2x6 screw securing the
ground cable.
8.Remove the tape and disconnect the
LCD cable, FL inverter cable, speaker
cable, and microphone cable.
9.Remove four M2x6 screws and four
M2x3 silver screws securing the top
cover.
10.Open the camera port cover on the
back of the computer.
11.Pull out the top cover just below the
video connector (yellow) to release a
latch.
12.Carefully lift the back side of the top
cover with display assembly. Lift slowly
to avoid damage to two latches on the
left side of the computer.
NOTE:  Be careful that the sound port cover
does not fall off.î
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è í 
						

							Toshiba TRR4/00, Tecra
Page 21Tecra 750 Series Disassembly Overview, (cont.)
 To remove the speakers, follow the steps below.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack, HDD pack,
optional memory module, modem
board, backup and RTC batteries,
keyboard, membrane switch, and top
cover with display assembly.
3.Remove four M2x4 silver screws
securing the speaker holders.
4.Lift out the speakers with cables and
holders.
5.Pull the speakers out of the holders.
6.Remove the tape securing the cables to
the insulator and remove the speakers.
NOTE:  The speaker wire is color coded.  Note
how the cables are routed.
To remove the system board, follow the steps
below.
1.Turn off the power to the computer.
Disconnect the AC adapter and all
external cables connected to the
computer.
2.Remove the battery pack, HDD pack,
optional memory module, modem
board, backup and RTC batteries,
keyboard, membrane switch, and top
cover with display assembly.
3.Remove three M2.5x4 screws
securing the metal frame and remove
it.
4.Remove the audio connectors cover.
5.Remove two M2.5x8 screws, and one
M2x4 silver screw securing the shield
plate to the system board.
6.Remove two stud screws and one
M2.5x4 screw securing the system
board to the middle frame.
7.Remove one M2x3 silver screw
securing the positioning plate and lift
out the plate. A tongue on the plate fits
into a notch.
8.Open the USB port cover and remove
one M2x4 silver screw securing the
USB port to the USB connector.
9.Pull the metal cover protecting the S-
video and PS/2 ports away from the
ports, so it doesn’t catch on them when
you lift up the board.
10.Lift up the system board to disconnect
two connectors.ê
î