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 pack
User documentation:  manuals, support material, registration card
Companion/utility disks
AC adapter (P/N: F1072A), localized power cord
Brochures for OmniBook accessories and Deskjet 320
MicroprocessorIntel486 DX2 50-MHz
Intel486 DX4 75-MHz
Intel486 DX4 100-MHz
Bus ArchitectureISA, Video local Bus 
						

							___________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 hard
drive can be replaced.
Hard drive manufacturer:  Toshiba for all capacities
Flexible disk
driveInternal 3.5 inch, 1.44-MB flexible disk drive is standard on all models.  The
flexible disk drive can be easily removed by the user and replaced with an
additional battery pack to double battery life.  This is part of the modularity
features of the OmniBook 4000.
Manufacturer:  Canon (subject to change)
Built-in I/O25 pin bi-directional ECP an EPP parallel port
SVGA out (up to 1024 x 768 x 256 colors) with simultaneous
viewing
115,000-b/s bi-directional infrared port.
Expansion Bus Connector for connecting to enhance port replicator (F1090A)
6-pin mini-DIN keyboard or PS/2 mouse
Headphone/stereo-out port
Microphone port
Stereo-in port 
						

							___________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 rebooting
Note:  Includes option to simultaneously display external video
and notebook display.
TFT Display
QualityTFT display manufacturing is a high precision but imperfect technology and
manufacturers cannot currently produce large displays that are cosmetically
perfect.  Most if not all TFT displays will exhibit some level of cosmetic
imperfection.  These cosmetic imperfections may be visible to the customer under
varying display conditions and can appear as bright, dim or dark spots.
This issue is common across all vendors supplying TFT displays in their products
and is not specific to the HP OmniBook display.
The HP OmniBook TFT displays meet or exceed all TFT manufacturers
standards for cosmetic quality of TFT displays. HP does not warrant that the
displays will be free of cosmetic imperfections.
TFT displays may have a small number of cosmetic imperfections and still
conform to the display manufacturers cosmetic quality specifications.
Here are some guidelines to use in determining what action to take on a customer
complaint of cosmetic imperfection in their TFT display:
1.  The unit should be viewed in the customers normal operating condition.
This means if the customer uses the unit predominately in DOS, or Windows, or in
some other application or combination of applications, that is where the
determination shall be made.  Self test is not a normal operating condition and is
not a sufficient tool to interpret display quality.
2.  In the customers normal operating mode:
a.  If 4 or more variant pixels appear clustered in the area approximated by a
thumbprint on the display surface, then the display should be considered for
replacement. 
						

							___________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 display is considered for replacement, it should be clear to the customer
that cosmetic variations on the replacement display may also exist, and may
require the customer to use a work-around to obscure the cosmetic imperfection.
4.  Customers with cosmetic-based complaints only, that do not conform to the
above conditions and tests will not normally be considered for display
replacement.  It will be left to the judgment of the HP-responsible person who, in
working with the customer, to identify work-arounds that are reasonable and
appropriate for the individual customer.  Customers who must have a more
perfect display solution should consider switching to an OmniBook with a DSTN
display.
We expect over time that the industry will continue to improve in their ability to
produce displays with fewer inherent cosmetic imperfections and will adjust our
HP guidelines as the improvements are implemented.
User interfaceKeyboard:  85-key touch-type keyboard with embedded numeric keypad and 12
Fn keys.  Wrist pad provides comfort for extended keyboard use.  External 6-pin
mini-DIN interface for external keyboard connection. (HP external keyboard (101-
key) Part number C3756A)
Pointing device:  Built in 25MM trackball positioned in the center
of the wrist pad for easy access and comfort.  Industry compliant
to maintain software compatibility.
Optional pointing devices:  Includes 6-pin mini-DIN interface for
external PS/2 mouse connection.  Also supports serial mouse
connection.
PowerBattery type:  Removable 14.4-Vdc rechargeable NiMH.  NiMH battery does notrequire complete discharge before recharging.  There is no memory effect that
reduces battery life.
Battery Life; rundown (approx.):
3-4 hrs on DSTN DX2/50
2-3 hrs on TFT DX4/100
Recharge time:  Approx. 75 minutes in suspend mode or off position.  The battery
trickle charges while the unit is turned on.  It takes several days to gain a full
charge while trickle charging.
PowerLow battery signals:  Low battery warning at 10 percent of full charge, followed by
save to hard disk after five minutes. 
						

							___________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 about the battery condition directly from
the hardware and not interrupt the CPU.  The OmniBook 4000 no longer has to
rely on software to determine the condition of the battery.  The condition can be
checked using two  methods that receive information from the BIOS
(CONFIGURATION [fn][f2], Windows Control Panel Power).
Energy S.T.A.R. compliant
AC Adapter:  100 to 240 Vac adapter (50 to 60 Hz) input; 21 Vdc, 1.35A output.
Use only an HP F1072A AC adapter (the type shipped with the OmniBook).  Using
any other adapter could damage the OmniBook and void the warranty.  Always
plug it into a grounded outlet..
Power management options: Advanced; Standard; Off; Custom.
Optional power accessories from HP:
A fully charged NiMH battery in storage will loose 20% of its charge per month in
storage.
External battery
chargerDesigned for desktop use.  It has an internal power supply and plugs in to the wall.
Works with 110/220 volts and 50/60Hz.  It also has a power cord to plug into the
OmniBook 4000.
Charges two additional batteries
HP part number:  F1074A
Automobile
adapterHP part number F1075A
NiMH battery
packHP part number F1073A
AC adapterHP part number F1072A
Accessory SlotsUser available PCMCIA Slots:  2 Type II or 1 Type III (version Two)
The PCMCIA slots are fully industry compatible and supports SystemSoft Card
Services and Socket Service (2.1).  The system will support a wide variety of
PCMCIA cards.
PCMCIA controller chip manufacturer:  Vadem 386.
Audio SystemsHigh performance audio:  16-bit stereo sound, Sound Blaster hardware
compatible.
Two stereo speakers with acoustic chambers 
						

							___________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) maximum
Environmental
TestingESD as per IEC-801-2, EN 55024-2
Drop testing:  1 drop flat onto all six faces from .75 meter
Also tests for altitude, magnetic & radiated susceptibility &
interference, shock & vibration.
Note: These are the tests that HP designs notebook computers
to meet.  Due to normal variations in the components of
individual machines, some machines will perform better and
some wont perform as well.  HP does not guarantee that every
notebook computer will meet  these specifications.
BIOSPlug and Play BIOS stored in EEPROM
User Upgradable via floppy drive
A corrupt BIOS that prevents the machine from booting requires a system
board replacement.  The BIOS can be corrupted by interrupting the BIOS
upgrade in the middle of the process.
Software and
Operating
SystemMicrosoft Windows for Workgroups 3.11
MS-DOS 6.2
Easy upgrade to Windows 95
Laplink Remote Access for easy connection to desktop PC, network printers, and
other OmniBooks 
						

							___________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 the system password, there is a master password that will
unlock the Omnibook.  The user  calls Technical Support to determine this master
password as follows:
1. Support will tell the user the keys to type at the password entry screen:
[alt][shft][f10]
2. The Omnibook generates and displays an encoded master password.
This is displayed under the normal password entry area.  At this point, this
is the only password that will unlock the Omnibook unless the user presses
[ESC] to remove the encoded master from the password entry screen.
Then the users stored password can be entered.
3. The user reads the encoded master password to Support.
4. Support runs a program that decodes the encoded password, and reads
the decoded password (alphanumeric) to the user.
5. The user types in the decoded password.
6. Omnibook decodes the encoded master password it generated and
compares it to the decoded password typed in by the user.
7. If the two passwords match, the Omnibook is unlocked.  The forgotten
password is automatically erased.  Support can then guide the user through
the process of entering a new  password.
8. If the two passwords do not match, the previous sequence must be
repeated until the user correctly enters a master password.
The encoded master password is an eight-character alphanumeric sequence that
the Omnibook  generates at random every time the appropriate keys are
pressed in the password entry screen.  Because it is generated randomly, a
master password can only be used to unlock the Omnibook  once.  If the user
forgets the password at another time, it will require another call to Support.  (If
the user presses the appropriate keys by mistake, pressing [ESC] will allow
entering the stored password.) 
						

							___________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 current owner.  This requires a sales receipt showing the unit serial
number and owners name, or a written statement from the owner attesting that
they are the owner of the unit.  The statement can be a FAX copy of the
document.  The fact that the unit is in the hands of an HP representative on the
behalf of the customer is  not evidence of ownership.  In addition, HP will not
descramble a unit for any non-owner, even if it involves law enforcement
agencies.  If you receive such a request, you should notify management and HP
Corporate Legal immediately.  (These requests may require a court order prior
to our participation.)
Further, you must log the name, serial number and date of the running of the
descramble program, and file the written backup with the log. The log and
backup is subject to standard records retention process and review.
The final issue relating to descramble of passwords is that HP cannot provide
information to users that would assist them in improperly descrambling a
password and opening a unit. 
						

							___________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
or 24MB, then the original 4MB or 8MB module must be replace with a larger
module.Figure 1 - Memory Doors, Modules, and Slots 
						

							___________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