Toshiba Tecra 780dvd Maintenance Manual

							Toshiba TRR4/00, Tecra
Page 7Tecra 780CDM / 780DVD 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; and do not
twist or bend the battery pack.
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 out the battery release lever and
slide it to the left to pop the battery up
slightly.
4.Grasp the battery pack and lift it out.
To install the battery pack, follow the steps below.
WARNING:  The battery pack is a lithium ion
battery which can explode if not replaced,
used, handled or disposed of properly.
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.
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. 
						

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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.Now, 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 the 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 cover or replace the
cover with an appropriate one.
4.Install the battery pack.
To remove the SelectBay 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 SelectBay lock to the unlock
position, shown by a red box.
4.Pull out the release lever.
5.Push the release lever in firmly to pop
the SelectBay module partially out of
the bay.
6.Grasp the module and pull it out.
CAUTION:  The SelectBay modules can
become hot with use.
Be careful when removing the module.
1.Insert the module in the computer and
press until it locks into place.
2.Fold the release lever into the closed
position.
3.Slide the SelectBay lock to the locked
position.  The red box should not be
visible.
4.Install the battery pack. Install the SelectBay modules as described
below. 
						

							Toshiba TRR4/00, Tecra
Page 9Tecra 780CDM / 780DVD Disassembly Overview, (cont.)
1.To install the cover, first remove the
SelectBay 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. You can use the SelectBay cover when you do
not need to use a SelectBay module.
1.Remove six M2x3 silver screws and
two M2.5x6 silver screws securing the
frame to the DVD-ROM drive.
2.Remove the connector cover.
3.Remove the metal frame, connector
board, and disconnect the flexible
cable. To disassemble the DVD-ROM drive, 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 M2x3 silver screws and
remove the FDD from the bracket. To disassemble the FDD, follow the steps below.îê
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1.Seat the FDD in the bracket and
secure the bracket with four M2x3
silver screws.  Tighten screws to a
torque of less than 2.2 kgfcm.
2.Insert the flexible cable into the
connector.  Press gently to assure 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 assemble the FDD, follow the steps below.
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 HDD 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.
To disassemble the HDD Pack, follow the steps
below.
1.Slide the cover firmly in the direction of
the arrow and remove it.
2.Remove the HDD tray and connector
cover.í
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							Toshiba TRR4/00, Tecra
Page 11Tecra 780CDM / 780DVD Disassembly Overview, (cont.)
Disassembling the HDD Pack, continued.
3.Remove four M2.5x6 silver screws
from HDD pack.
4.Remove four M3x4 flat-head screws
and the HDD frame.
5.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.í
è
To assemble the HDD pack, follow the steps
below.
1.Connect the flexible cable connector to
the HDD.
2.Seat the HDD frame on the HDD and
secure it with four M3x4 flat-head
screws.
3.Seat the connector cover on the flexible
cable connector.  Be sure to match the
positioning pins to the holes on the
flexible cable and metal cover.
CAUTION: Do not hold the HDD by its flat
surfaces.  It may damage the HDD.
4.Secure four M2.5x6 silver screws.
5.Seat the cover onto the HDD.î 
						

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To install the HDD pack, follow the steps below.
1.Align the HDD pack with the 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.
To remove the memory module(s), make sure the
computer is in boot mode and follow the steps
below.
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 pack.
3.Lift up the mylar cover.
4.Use a slender object (plastic card) to
press the latches on either side of the
memory module(s) to the outside and
the memory module will pop up.
5.Grasp the memory module(s) by the
sides and pull it out.
CAUTION:  Do not touch the connectors on
the memory module(s) or on the computer.
Debris on the connectors may cause memory
access problems.
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, optional PC
card, and HDD pack.
3.With the computer still upside down,
remove two M2x8 silver screws, two
M2x22 silver screws and two M2x14
silver screws.
4.Turn the computer right side up and
open the display panel and PC card
cover.
5.Grasp the sides of the palmrest and pull
it forward until tabs on either side clear
the holes on the top cover.  Three
latches are located under the palmrest
as shown below.
6.Carefully lift the palmrest.
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							Toshiba TRR4/00, Tecra
Page 13Tecra 780CDM / 780DVD Disassembly Overview, (cont.)
7.Remove four M2x6 screws securing
the modem board (or the dummy cover)
and lift it out. Opening the palmrest, continued.í
To remove the backup and RTC batteries, 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, optional PC
card, HDD pack, optional memory
module and modem board.
3.Lift the backup battery mylar cover.
4.Disconnect the backup battery cable
from PJ511 on the system board,
unthread the cables and lift out the
backup battery.
5.Disconnect the RTC battery from PJ510
on the system board, unthread the
cables and lift it out.
To install a modem board, follow the steps
below.
1.Connect the modem board to the
corresponding connector in the
computer.
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 on the
computer, then secure the modem
board module with four M2x6 screws.
3.Lay the palmrest in place and press
down to seat it firmly.
4.Close the PC card slot cover and
display panel.
5.Turn the computer upside down.
6.Secure two M2x22 silver screws, two
M2x8 silver screws, and two M2x14
silver screws to the bottom of the
computer.
7.Install the HDD pack, optional PC card,
and battery pack. 
						

							4/00, Tecra Toshiba TRRPage 14Tecra 780CDM / 780DVD Disassembly Overview, (cont.)
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, optional PC
card, HDD pack, optional memory
module, modem board and backup
and RTC batteries.
3.Peel off the tape placed on the folded
end of the keyboard flexible cable.
4.Disconnect the flexible cable from
PJ580 on the system board.
5.Lift up the front edge of the keyboard
and lift out the keyboard. To remove the keyboard, follow the steps below.
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, optional PC
card, HDD pack, optional memory
module, modem board, backup and
RTC batteries, and keyboard.
3.Disconnect the membrane switch
cable from PJ570 on the system board.
4.Remove two M2.5x4 screws securing
the membrane switch unit and lift out
the unit.
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, optional PC
card, HDD pack, optional memory
module, modem board, backup and
RTC batteries, keyboard and mem-
brane switch.
3.Remove six M2.5x10 silver screws
from the bottom of the computer.
4.Remove the mask and two M2x6
screws from the position under the
battery pack.
5.Remove three M2.5x4 silver screws
from the back of the computer.
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							Toshiba TRR4/00, Tecra
Page 15Tecra 780CDM / 780DVD Disassembly Overview, (cont.)
Removing the top cover with display assembly,
continued.
6.Turn the computer right side up and
open the display panel.
7.Slightly lift up the LCD cable cover and
pull it forward to remove it, then remove
the plastic lens.
8.Remove the tape off the LCD cables.
9.Remove one M2x6 screw securing the
ground cable.
10.Disconnect the LCD cable, FL inverter
cable, speaker cable and microphone
cable.
11.Remove six M2x6 screws, one M2x8
screw and three M2x4 silver screws
securing the top cover.
12.Open two port covers on the back of the
computer.
13.Pull out the top cover just below the
composite video connector (yellow) to
release a latch.
14.Carefully lift up the back side of the top
cover with display assembly.  Lift slowly
to avoid damage to the two latches on
the left side of the computer.î í
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							4/00, Tecra Toshiba TRRPage 16Tecra 780CDM / 780DVD Disassembly Overview, (cont.)
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, optional PC
card, HDD pack, optional memory
module, modem board, backup and
RTC batteries, keyboard, membrane
switch and top cover with display
assembly.
3.Lay the display down.  Partially lift the
insulator covering the speaker cables.
4.Remove four M2x4 screws securing
the speaker holders.
5.Observe how the cables are threaded,
then lift out the speakers, cables and
holders.
6.Pull the speakers out of the holders. To remove the speakers, follow the steps below.
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, optional PC
card, HDD pack, optional memory
module, modem board, backup and
RTC batteries, keyboard, membrane
switch, top cover with display assembly.
3.Remove one M2x4 silver screw and
two M2.5x6 screws securing the shield
plate and remove it.
4.Remove one M2.5x4 screw near the
PC card slot.
5.Remove one M2.5x4 screw securing
the connection board and lift it out.
6.Remove one M2.5x6 screw under the
connection board.
7.Remove one M2x4 silver screw
securing the USB slot to the USB
connector.
CAUTION: Do not remove the heat-sink on the
CPU.  The grease can dry out and cause
damage to the CPU.
8.Lift up the system board to disconnect
three connectors.ê