Toshiba Libretto 50CT/70CT Manual

							4.14  AccuPoint Board4  Replacement Procedures4-30Libretto 50CT/70CT Maintenance Manual4.14 AccuPoint BoardRemoving the AccuPoint BoardTo remove the AccuPoint board, follow the steps below and refer to Figure 4-24.
1. Turn the computer off.  Disconnect the AC adapter and optional units from the
computer.
2. Remove the battery, display mask, FL inverter board, LCD module, and power switch
board as described in Sections 4.2 and 4.10 through 4.13.
3. Remove two silver M2x3 screws, then the AccuPoint board, metal plate, and
AccuPoint flexible cable.Figure 4-24  AccuPoint board removal
4. Lift out the pointing switch buttons. 
						

							4  Replacement Procedures4.14  AccuPoint BoardLibretto 50CT/70CT Maintenance Manual4-31Installing the AccuPoint BoardTo install the AccuPoint board, follow the steps below and refer to Figure 4-24.
1. Replace the pointing switch buttons.
2. Place the AccuPoint flexible cable into position, then the metal plate and the
AccuPoint board on top.
3. Secure the AccuPoint board and metal plate with two silver M2x3 screws.
4. Install the power switch board, LCD module, FL inverter board, display mask, and
battery as described in Sections 4.13 back through 4.10, and 4.2. 
						

							4.15  LCD Flexible Cable4  Replacement Procedures4-32Libretto 50CT/70CT Maintenance Manual4.15 LCD Flexible CableRemoving the LCD Flexible CableTo remove the LCD flexible cable, follow the steps below and refer to Figure 4-25.
1. Turn the computer off.  Disconnect the AC adapter and optional units from the
computer.
2. Remove the battery, display mask, FL inverter board, LCD module, power switch
board, and AccuPoint board as described in Sections 4.2 and 4.10 through 4.14.
3. Turn the Display Assembly upside down and remove one silver M2x3 screw which
secures the LCD flexible cable to the top cover. Remove the tape and the plastic
cover over the LCD flexible cable connected to the right side hinge.
4. Remove one M2.5x5 screw which secures the left side hinge to the LCD cover.
5. Carefully remove the LCD flexible cable from the display assembly. Be careful not to
cut the screw terminal area on the cable.Figure 4-25  Flexible cable removal 
						

							4  Replacement Procedures4.15  LCD Flexible CableLibretto 50CT/70CT Maintenance Manual4-33Installing the LCD Flexible CableTo install the LCD flexible cable, follow the steps below and refer to Figures 4-26 and 4-25.
1. Tuck the right side hinge on the cable roll-center.
2. Preform the cable by making a 1.5 turn coil around the roll-center.Figure 4-26  Preforming the LCD flexible cable
3. While holding the hinge area roll, put the LCD flexible cable back into the display
assembly and place it into position.
4. Place the right side hinge plastic cover into position and replace the tape that covers
the hinge cover.
5. Replace one M2x3 silver screw to secure the LCD flexible cable to the top cover.
6. Replace one M2.5x5 screw to secure the left side hinge.
7. Install the AccuPoint board, power switch board, LCD module, FL inverter board,
display mask, and battery as described in Sections 4.14 back through 4.10 and 4.2. 
						

							4.16  I/O Adapter Board4  Replacement Procedures4-34Libretto 50CT/70CT Maintenance Manual4.16 I/O Adapter BoardRemoving the I/O Adapter BoardTo remove the I/O adapter board, follow the steps below and refer to Figures 4-27 to 4-29.
1. Remove the I/O adapter from the computer.  Disconnect all the external cables from
the I/O adapter.
2. Turn the I/O adapter upside down and remove: three M2x4 silver screws and one
M2x5 silver screw on the bottom, and three M2x4 silver screws at the back.Figure 4-27  Silver screw removal
3. Release five latches and remove the upper cover.Figure 4-28  Upper cover removal 
						

							4  Replacement Procedures4.16  I/O Adapter BoardLibretto 50CT/70CT Maintenance Manual4-354. Remove five M2x4 screws.
5. Remove the I/O adapter board.Figure 4-29  I/O adapter board removalInstalling the I/O Adapter BoardTo install the I/O adapter board, follow the steps below and refer to Figures 4-29 back
through 4-27.
1. Reseat the I/O adapter board and secure it with five M2x4 screws.
2. Replace the upper cover.
3. Turn the I/O adapter upside down, and secure three M2x4 silver screws and one
M2x5 silver screw on the bottom, and three M2x4 silver screws at the back. 
						

							Appendices 
						

							App-iiLibretto 50CT/70CT Maintenance Manual 
						

							Libretto 50CT/70CT Maintenance ManualApp-iiiTable of ContentsAppendix A  Handling the LCD Module............................................................................A-1
Appendix B  Board Layout................................................................................................B-1
B.1  System Board Front View..............................................................................B-1
B.2  System Board Back View...............................................................................B-2
Appendix C  Pin Assignments............................................................................................C-1
C.1  PJ1 Exp. Memory Connector (140-pin)..........................................................C-1
C.2  PJ2 Docking I/F Connector (132-pin).............................................................C-3
C.3  PJ3 LCD I/F Connector (50-pin)....................................................................C-5
C.4  PJ4 RTC Battery I/F Connector (3-pin)..........................................................C-6
C.5  PJ5 HDD I/F Connector (44-pin)....................................................................C-6
C.6  PJ7 PC Card Connector (68-pin)....................................................................C-7
C.7  PJ301 Headphone Connector (5-pin)..............................................................C-8
C.8  PJ401 DC IN Connector (2-pin).....................................................................C-8
C.9  PJ402 Battery Connector (10-pin)..................................................................C-8
Appendix D  Key Layouts.................................................................................................D-1
D.1  United States (US) Keyboard.........................................................................D-1
D.2  United Kingdom (UK) Keyboard....................................................................D-1
D.3  German (GR) Keyboard.................................................................................D-2
D.4  French (FR) Keyboard....................................................................................D-2
Appendix E  Wiring Diagrams...........................................................................................E-1
E.1  Parallel Port Wraparound Connector..............................................................E-1
E.2  Serial Port Wraparound Connector.................................................................E-1
E.3  Serial Port Direct Cable (9-Pin to 9-Pin).........................................................E-2
E.4  Serial Port Direct Cable (9-Pin to 25-Pin).......................................................E-2
Appendix F  BIOS Rewrite Procedures...............................................................................F-1
Appendix G  Reliability......................................................................................................G-1
Figures
Figure B-1  System board layout (front)............................................................................B-1
Figure B-2  System board layout (back).............................................................................B-2 
						

							App-ivLibretto 50CT/70CT Maintenance ManualFigure D-1  US keyboard...................................................................................................D-1
Figure D-2  UK keyboard..................................................................................................D-1
Figure D-3  GR keyboard..................................................................................................D-2
Figure D-4  FR keyboard...................................................................................................D-2
Figure E-1  Parallel port wraparound connector.................................................................E-1
Figure E-2  Serial port wraparound connector...................................................................E-1
Figure E-3  Serial port direct cable (9-pin to 9-pin)............................................................E-2
Figure E-4  Serial port direct cable (9-pin to 25-pin)..........................................................E-2
Tables
Table C-1  Exp. Memory connector pin assignments (140-pin) (1/2)..................................C-1
Table C-1  Exp. Memory connector pin assignments (140-pin) (2/2)..................................C-2
Table C-2  Docking I/F connector pin assignments (132-pin) (1/2)....................................C-3
Table C-2  Docking I/F connector pin assignments (132-pin) (2/2)....................................C-4
Table C-3  LCD I/F connector pin assignments (50-pin)....................................................C-5
Table C-4  RTC Battery I/F connector pin assignments (3-pin)..........................................C-6
Table C-5  HDD I/F connector pin assignments (44-pin)....................................................C-6
Table C-6  PC Card connector pin assignments (68-pin)....................................................C-7
Table C-7  Headphone connector pin assignments (5-pin)..................................................C-8
Table C-8  DC IN connector pin assignments (2-pin).........................................................C-8
Table C-9  Battery connector pin assignments (10-pin)......................................................C-8
Table G-1  MTBF..............................................................................................................G-1