Toshiba Libretto 50CT/70CT Manual

							3.24  SETUP3  Tests and Diagnostics3-56Libretto 50CT/70CT Maintenance ManualCOM levelInterrupt levelI/O address
COM143F8H(Default)
COM232F8H
COM343E8H
COM353E8H
COM373E8H
COM432E8H
COM452E8H
COM472E8H
Not used(Disables port)
NOTE:  If the setting for the serial port is the same as that for the Modem port,the Modem port is automatically set to disabled.(b) Infrared Port
This option allows you to set the COM level for the infrared port. The infrared
port interrupt request level (IRQ) and I/O port base address for each COM
level is shown below.
COM levelInterrupt levelI/O address
COM 143F8H
COM 232F8H
COM 343E8H
COM 353E8H
COM 373E8H
COM 432E8H
COM 452E8H
COM 472E8H
Not Used(Disables port)
(Default)
When you select one of the above options, except for Not used, a subwindow
similar to the one below displays to let you set the infrared port mode. The
options for this setting are IrDA Compatible (default) and ASK.
  OPTIONMode=IrDA Compatible 
						

							3  Tests and Diagnostics3.24  SETUPLibretto 50CT/70CT Maintenance Manual3-57(c) Parallel Port
This option sets the interrupt level and I/O address for the parallel port.  When
the Printer Port Type (see settings below) is set to Std. Bi-directional, the
options are:
LPT settingInterrupt
levelI/O address
LPT 17378H
LPT 25278H
LPT 373BCH
Not Used(Default)
Others(Other settings are made
automatically by the Plug-
and-Play operating system.)
When the Printer Port Type (see settings below) is set to ECP, the DMA
channel can also be set to 1, 2, or 3. The default is 3.
LPT settingInterrupt
levelI/O addressDMA Channel
LPT 17378H3
LPT 25278H3
LPT 373BCH3
Not Used(Default)
Others(Other settings are made
automatically by the Plug-and-
Play operating system.)
When you select one of the above options, except for Not used, a subwindow
similar to the one below displays to let you set the parallel port mode.  The
options for this setting are ECP (default) and Std. Bi-Directional.
  OPTIONSMode
DMA=
=ECP
Channel 3For most printers, the port should be set to ECP.  With other parallel devices,
the setting should be Std. Bi-Directional. 
						

							3.24  SETUP3  Tests and Diagnostics3-58Libretto 50CT/70CT Maintenance Manual(d) Sound System
This option allows you to enable or disable the sound system.
 EnabledEnables the sound system. (Default)
 DisabledDisables the sound system.
When Enabled is selected, a subwindow similar to the one below displays to let
you set the WSS I/O address, SBPro I/O address, WSS & SBPro &
MPU401 IRQ levels, WSS(Play) DMA, and SBPro DMA for the sound
system.  (Some of the values displayed cannot be changed on the Libretto.)WSS I/O AddressUse this option to set the WSS I/O address from among the following settings:
530h (default), 540h, 550h, 560h
SBPro I/O AddressUse this option to set the SBPro I/O address from among the following
settings:
220h (default), 240h
Synthesizer I/O AddressYou cannot change this value.
WSS & SBPro & MPU401 IRQ LevelThis option sets the WSS & SBPro & MPU401 IRQ level for the sound
system.  The available settings are:
IRQ5 (default), IRQ7, IRQ9, IRQ11, IRQ15 
						

							3  Tests and Diagnostics3.24  SETUPLibretto 50CT/70CT Maintenance Manual3-59WSS(Play) DMAThis option sets the WSS(Play) DMA for the sound system.  The available
settings are:
Channel 0, Channel 1 (default), Channel 3
SBPro DMAThis option sets the SBPro DMA for the sound system.  The available settings
are:Channel 0 (default), Channel 1, Channel 3
Same as playControl I/O AddressYou cannot change this value.
MPU401 (MIDI I/F) IRQ LevelYou cannot change this value.
6. Others
Whether or not you need to configure the computer with these options depends
primarily on the kind of software or peripherals you use.
(a) Power-up Modes
This option lets you choose between AutoResume and boot mode.  You can
also set this option using hotkeys.
 BootTurns on boot mode. (Default)
 HibernationTurns on hibernation feature.
(b) CPU Cache
Use this feature to enable or disable the CPU cache.
 EnabledEnables the CPU cache. (Default)
 DisabledDisables the CPU cache. 
						

							3.24  SETUP3  Tests and Diagnostics3-60Libretto 50CT/70CT Maintenance ManualWhen Enabled is selected, a subwindow similar to the one below displays to let
you select the cache write policy.  The options for this setting are Write-back
(default) and Write-through for CPU cache.
 OPTIONWrite policy=Write-backWrite-back policy provides better system performance, because main memory
is accessed only when necessary to update the cache contents with changes in
main memory.  Write-through policy accesses main memory every time data is
handled by the processor.
(c) System Auto Off
Used to enable or disable the system automatic off function in hibernation
mode when you are working in DOS. In Boot mode, it is disabled and not
displayed.
 DisabledDisable system automatic power off.
 xx MinAutomatically turns off power to the system if
it is not used for the duration set. The duration
xx can be set to 10, 20, 30, 40, 50, or 60
minutes.
(d) Alarm Volume
This option disables or sets the volume level of the alarm.  Setting this option
to off disables the computer’s sound function for alarms.  This option can also
be set by hotkeys.
 Off
Low
Medium
HighDisables the alarm.
Sets the alarm volume to low.
Sets the alarm volume to medium.
Sets the alarm volume to high. (Default)
When Alarm Volume is selected, the subwindow below displays to let you
enable or disable certain functions.Low Battery Alarm=  Enabled
Panel Close Alarm=  Enabled EnabledEnables the feature. (Default)
 DisabledDisables the feature. 
						

							3  Tests and Diagnostics3.24  SETUPLibretto 50CT/70CT Maintenance Manual3-61(e) System Beep
Use this feature to enable or disable the system beep.
 EnabledEnables the feature. Default
 DisabledDisables the feature.
(f) Panel Power On/Off
This option allows you to automatically turn your computer on or off by
opening or closing the display panel.  If this feature is enabled when the
computer is in Resume mode, the system is automatically powered off when
the display panel is closed and powered on when the panel is opened.  This
option does not appear when the computer is in boot mode.
 EnabledEnables the feature. Default
 DisabledDisables the feature.
NOTE:  Do not remove the AC adapter and battery pack at the same time whenyou use this feature.  If you do, data saved by AutoResume will be lost.  You mustalso reset this option.(g) Alarm Power On
This option lets you set a time and date for automatic power on and lets you
enable or disable the ring indicator feature. Ring Indicator is displayed only
when the computer is in Resume mode and Alarm Date Option is displayed
when Alarm Time is enabled.OPTIONS
Alarm Time=  xx:xx:00
Alarm Date Option
Ring Indicator=  xx - xx
=  Enabled
Alarm Time is set in the sequence of hours and minutes. Seconds cannot be
changed. Alarm Date Option is set in the sequence of month and day. If Alarm
Date is set to Disabled, the computer will be powered on at the same time every
day. Press ¯
 to move the cursor to the right and ­ to move the cursor to the left
when you set the date and time. 
						

							3.24  SETUP3  Tests and Diagnostics3-62Libretto 50CT/70CT Maintenance ManualNOTES:1.Do not remove the AC adapter and battery pack at the same time when you use this feature.  If you do so, data saved by AutoResume will be lost.  You must also resetthis option.2.If you have set a password and the computer boots by the Auto Power On function and Resume is on, the computer will start with the instant security function enabled. The Password = message is not displayed; however, you must enter the password to use the computer.(h) Pointing Devices
This option enables or disables the AccuPoint.
 Auto selectedIf the PS/2 mouse is connected to the
computer when you turn the power on, the
PS/2 mouse is enabled and the AccuPoint is
disabled.  Otherwise, the AccuPoint is enabled.
(Default)
 SimultaneousEnables both the AccuPoint and PS/2 mouse.
(i) Boot Priority
Use this option to select the disk drive priority for boot up.
 FDD®HDDThe computer looks for bootable files first on the
FDD and next on the HDD. (Default) HDD®FDDThe computer looks for bootable files first on
the HDD and next on the FDD.
You can reverse the order by holding the 
F10 key down while the computer is
booting.  This procedure alternates the setup setting. 
						

							Chapter 4Replacement Procedures 
						

							4-iiLibretto 50CT/70CT Maintenance Manual 
						

							Libretto 50CT/70CT Maintenance Manual4-iiiTable of Contents4.1  Overview.....................................................................................................................4-1
4.2  Battery Pack................................................................................................................4-6
4.3  Optional PC Card........................................................................................................4-8
4.4  Hard Disk Drive (HDD)............................................................................................4-10
4.5  Optional Memory Module..........................................................................................4-12
4.6  Keyboard...................................................................................................................4-14
4.7  Display Assembly......................................................................................................4-16
4.8  RTC Battery..............................................................................................................4-19
4.9  System Board............................................................................................................4-20
4.10  Display Mask...........................................................................................................4-21
4.11  FL Inverter Board....................................................................................................4-23
4.12  LCD Module...........................................................................................................4-25
4.13  Power Switch Board................................................................................................4-27
4.14  AccuPoint Board.....................................................................................................4-29
4.15  LCD Flexible Cable.................................................................................................4-31
4.16  I/O Adapter Board...................................................................................................4-33
Figures
Figure 4-1  Removing the battery pack...............................................................................4-6
Figure 4-2  Removing the PC Card.....................................................................................4-8
Figure 4-3  Installing the PC card.......................................................................................4-9
Figure 4-4  HDD cover removal.......................................................................................4-10
Figure 4-5  HDD removal.................................................................................................4-11
Figure 4-6  HDD bracket removal.....................................................................................4-11
Figure 4-7  Keyboard brace removal.................................................................................4-12
Figure 4-8  Screw removal................................................................................................4-12
Figure 4-9  Optional memory module removal..................................................................4-13
Figure 4-10  Keyboard removal........................................................................................4-14
Figure 4-11  Metal cover removal.....................................................................................4-16
Figure 4-12  Display flexible cable removal.......................................................................4-17