HP Omnibook 4000c Ct Service Manual

___________11 AccessoriesDescriptionPart
Number4-MB RAM expansion cardF1076A8-MB RAM expansion cardF1077A16-MB RAM expansion cardF1078A260-MB Hard Disk DriveF1091A340-MB Hard Disk DriveF1092A520-MB Hard Disk DriveF1093A810-MB Hard Disk DriveF1032A3.5 inch Floppy Drive ModuleF1079AAC AdapterF1072ANiMH Battery Pack ModuleF1073AExternal Battery Charger (Charges up to two batteries
concurrently)F1074AAutomobile AdapterF1075AEnhanced Port ReplicatorF1090AWhat comes in
the boxOmniBook 4000 mainframe
Battery...

___________12 MemoryMain MemoryDX2/50 MHz, Model 260 (F1081A)
DX4/100 MHz, Model 810 (F1160A)
All other models4MB RAM
16MB RAM
8MB
Max Possible RAM32MB
Type of memory boardsHP Proprietary boards, 2 user accessible slots on the
bottom case.
Expansion Memory
board  options4-MB  (HP # F1076A)
8-MB  (HP # F1077A)
16-MB (HP # F1078A)
Cycle time70ns
Mass storageThe hard disk drive can be removed by the user for easy upgrades.  The hard
drive is located on the bottom case and with the removal of one screw the...

___________13 Display/videoThe OB4000 DSTN may report the display RAM to be 1024KBs, however, it is
512KB.  Later versions have corrected this.  It is not a hardware problem but a
reporting problem.
Display RAM is not upgradable.
Display Manufacturer:  Hitachi
Video graphics controller chip:  Western Digital 90c24 rocket chip.
External video resolution (both types):  Supports VGA/SVGA
external monitors with up to 1024 x 768 x 256 colors in
noninterlaced mode.
Auto detection of external monitor without...

___________14 b.  On OmniBook 4000CT models, if more than 30 total pixels  anywhere on the
display are bad, then the display should be considered for replacement.  On
OmniBook 600CT and OmniBook 5000CT models, if more than 15 total pixels
anywhere on the display are bad, then the display should be considered for
replacement.
These are the only conditions in this guideline that may call for a replacement due
to a defect in material or workmanship based on the HP Limited Warranty
Statement.
3.  If a...

___________15 Battery life can be doubled by installing second battery in place of the 3.5 
flexible drive.  The OmniBook will recognize the additional battery and provide
battery status of both batteries (can be installed hot).
Smart Battery:  The OmniBook 4000 uses Smart battery technology.  The
battery itself contains an ASIC (Application Specific Integrated Circuit)  that is
able to continuously test and track the status of the battery.  The OmniBook BIOS
can then receive high-quality information...

___________16 Audio SystemsI/O:  Headphone/stereo-out port; microphone port; Stereo-in port
IRQ default setting for soundblaster is 5.
Sound Manufacturer:  ESS
Operating
environmentTemperature:
DSTN display models: 41 to 104 degrees F (5 to 40 degrees C)
TFT display models:  50 to 104 degrees F (10 to 40 degrees C)
90% relative humidity at 104 degrees F (40 degrees C) maximum
Storage
environmentTemperature: -40 to 149 degrees F (-40 to 65 degrees C)
90% relative humidity at 149 degrees F (65 degrees C)...

___________17 Supported
Operating
SystemsMS DOS version 6.22*
Microsoft Windows for Workgroups  3.11*
Microsoft Windows 95*
Microsoft NT workstation 3.51**
OS/2®
  version 3.0**
* Supported to the application level.  ** Only setup and configuration supported.
SecurityPhysical security from Kensignton Lock
System password:  When the password setting is enabled, a window will pop-up
to allow the user to enter the old password, enter a new password and to verify
the new
Password
DecodeIf the user forgets...

___________18 Password
Decode PolicyThe password descramble programs for the HP OmniBook PCs  are protected as
HP Company Private information.  They may not be copied, backed-up, printed or
distributed.  There are only six official copies of each program.
In addition to protecting the program itself, its use is also controlled.  Hewlett-
Pakard and authorized support providers must ensure with written evidence that
the OmniBook that is being descrambled is actually in the hands of the units
actual and...

___________19 Notebook Hardware Structure
Field Replaceable Assemblies
Installing memory
(End User Replaceable)
The OmniBook 4000 family has two memory locations for expanding  system RAM.
The memory location on the side of the OmniBook that has the battery also has the
factory RAM module installed.  To add an additional 8MB or 16MB of RAM, use the
location on the other side of the unit near the floppy drive.  If the base unit has
4MB or 8MB of memory, and you want to expand the memory to more than 20MB...

___________20 Battery Module and Floppy Disk Drive Module
(End User Replaceable)
The Battery  and Floppy Disk Drive Modules are user replaceable.  A second
Battery Module may be installed in the Floppy Disk Drive Bay.    This doubles the
battery life of the OmniBook 4000.
To remove either module, turn the OmniBook over.  Squeeze the two levers
together and slide the module forward.
Reverse the procedure to install a new Battery  or Floppy Disk Drive Module.Figure 2 - Floppy Drive and Battery