Toshiba Libretto 50CT/70CT Manual

Libretto 50CT/70CT Maintenance ManualA-1Appendix A  
Appendix AHandling the LCD ModulePrecautions for handling the LCD module
The LCD module can be easily damaged during assembly or disassembly. Therefore, please
observe the following precautions when handling it:
1. When installing the LCD module in its cover, be sure to seat it so that it is properly
aligned and maximum visibility of the display is maintained.2. Be careful to align the holes at the four corners of the LCD module with the
corresponding...

Appendix Appendix A   Handling the LCD ModuleA-2Libretto 50CT/70CT Maintenance ManualIf the surface is very dirty, use a CRT cleaning agent. Apply the agent to a cloth and
then wipe the panel’s surface. Do not apply cleanser directly to the panel.4. If water or other liquid is left on the panel’s surface for a long period, it can change
the screen’s tint or stain it.  Be sure to quickly wipe off any liquid.5. Glass is used in the panel, so be careful not to drop it or let it strike a hard object,
which...

Appendix Appendix A   Handling the LCD ModuleLibretto 50CT/70CT Maintenance ManualA-36. CMOS-LSI circuits are used in the module, so guard against damage from
electrostatic discharge. Be sure to wear a wrist or ankle ground when handling the
module.7. Do not expose the module to direct sunlight or strong ultraviolet rays for long periods.8. Do not store the module at temperatures below specifications. Cold can cause the
liquid crystals to freeze, lose their elasticity or otherwise suffer damage. 

Appendix Appendix A   Handling the LCD ModuleA-4Libretto 50CT/70CT Maintenance Manual9. Do not disassemble the LCD module. Disassembly can cause malfunctions.10. If you transport the module, do not use packing material that contains epoxy resin
(amine) or silicon glue (alcohol or oxime). These materials can release gas that can
damage the panel’s polarization. 

Libretto 50CT/70CT Maintenance ManualB-1Appendix B  
Appendix BBoard LayoutB.1System Board Front ViewFigure B-1  System board layout (front) 

Appendix B Board LayoutB-2Libretto 50CT/70CT Maintenance ManualB.2System Board Back ViewFigure B-2  System board layout (back) 

Appendix B Board LayoutLibretto 50CT/70CT Maintenance ManualB-3Table B-1  System board (front)MarkNumberName(A)IC2PETUNIA2 GA(B)IC13,IC14VRAM(C)IC19SIR(D)PJ2Docking I/F connector(E)PJ5HDD I/F connector(F)PJ7PC card connector(G)PJ401DC IN connector
Table B-2 System board (back)MarkNumberName(A)IC1CPU(B)IC3,IC4,IC5,IC616M DRAM(C)IC11Clock generator(D)IC12VGA GA(E)IC17Flash BIOS(F)IC20Keyboard controller(G)IC301Libretto 50CT: OPL3SA2
*Libretto 70CT: OPL3SA2(H)PJ3Display assembly I/Fconnector(I)PJ4RTC...

Appendix B Board LayoutB-4Libretto 50CT/70CT Maintenance Manual 

Libretto 50CT/70CT Maintenance ManualC-1Appendix C  
Appendix C  Pin AssignmentsC.1PJ1 Exp. Memory Connector (140-pin)
Table C-1  Exp. Memory connector pin assignments (140-pin) (1/2)Pin No.Signal NameI/OPin No.Signal...

Appendix Appendix C   Pin AssignmentsC-2Libretto 50CT/70CT Maintenance ManualTable C-1 Exp. Memory connector pin assignments (140-pin) (2/2)Pin No.Signal NameI/OPin No.Signal...