HP Omnibook Xe4500 Service Manual

HP Omnibook XE4100/XE4500 Product Information 1-13
  Table 1-8. Omnibook XE4100, XE4500 Accessories
AccessoryDescriptionOmnibook
XE4500
Omnibook
XE4100
Memory
F4694-60901128MB DDR266B
•
F4695-60901256MB DDR266B
•
F4696-60901512MB DDR266B
•
1818-8504SDRAM module, 128MB PC133  SODIMM (X16)
•
1818-8635SDRAM module, 256MB PC133 SODIMM (X16)
•
1818-8604SDRAM module, 512MB PC133  SODIMM (X8)
•
Hard Drives
0950-4288HDD-40GB 9.5mm, Toshiba ATA100
••
0950-4320HDD-40.0GB 9.5mm, IBM ATA100 FDB
••
Power Options...

1-14 Product Information HP Omnibook XE4100/XE4500
Internal Design
The motherboard PCA is the central component of the notebook’s design. It plays a role in virtually
all system functions. The CPU module and most other subsystems connect to the motherboard.
The following figure shows the connections among the notebook’s replaceable electronic modules.
Table 1-9 on page 1-15 lists the roles that these modules play in the notebook’s functional subsystems.
 
  Figure 1-5. Replaceable Module Diagram 

HP Omnibook XE4100/XE4500 Product Information 1-15
  Table 1-9. Functional Structure Description
BootupCPU module
Motherboard
Hard disk drive
Floppy driveMain processor (MMO).
Primary system circuitry, system BIOS.
First source of disk-based startup code.
Second source of disk-based startup code.
ProcessorCPU module
MotherboardMain processor, numeric data processor, L1 and L2 cache.
Primary system circuitry.
MemoryMotherboard
SDRAM moduleVideo RAM (XE4500).
Changeable SDRAM (2 slots), video RAM...

HP Omnibook XE4100/XE4500 Removal and Replacement 2-1
2 
Removal and Replacement
This chapter tells you how to remove and replace the notebook’s components and assemblies. The
items marked by 
• in the following table are user-replaceable.
  Table 2-1. Removal Cross-Reference
 
 • Assembly, speaker (page 2-12).
Battery, CMOS (page 2-37).
 • Battery, main (page 2-4).
 • Card, wireless LAN mini-PCI (page 2-6).
Case, bottom (page 2-35).
Case, top (page 2-20).
 • Cover, keyboard (page 2-10).
Assembly,...

2-2 Removal and Replacement HP Omnibook XE4100/XE4500
  Table 2-2. Required Equipment
 • Small Phillips screwdriver, preferably magnetized.
 • Small flat-blade screwdriver.
 • 5 mm nut driver
 
Table 2-3. Recommended Screw Torque Values
Screw Thread SizeTorque (cm-kgf)Torque (in-lbf)
M2 2,0 – 2,5 1.7 – 2.2
M2.5 (hinges) 3,5 – 4,0 3.0 – 3.4
M2.5 (other) 2,5 – 3,0 2.2 – 2.6
M3 2,5 – 3,0 2.2 – 2.6
Standoff, hex 2,5 – 3,0 2.2 – 2.6 

HP Omnibook XE4100/XE4500 Removal and Replacement 2-3
Disassembly Flowchart
The following diagram shows the general “path” you will use when disassembling the notebook to
access any particular component.
  Figure 2-1. Disassembly Flow 

2-4 Removal and Replacement HP Omnibook XE4100/XE4500
Removing the Battery
(User-Replaceable)
Required Equipment
 • None.
Removal Procedure
 • Slide the battery’s release latch, then pull the battery out of its compartment.
 
Figure 2-2. Removing the Battery 

HP Omnibook XE4100/XE4500 Removal and Replacement 2-5
Removing a SDRAM Module
(User-Replaceable)
The notebook has no system memory built into its motherboard, but has two slots for SDRAM
modules. One slot contains an SDRAM module that was factory installed.
  Note
 
Omnibook XE4100 models use only PC133 SDRAM modules, and Omnibook XE4500 models use
only DDR266 SDRAM modules. Using the wrong type of module prevents the notebook from
booting.
 
Caution
 
Handle the SDRAM module only by its edges and...

2-6 Removal and Replacement HP Omnibook XE4100/XE4500
Removing the Wireless LAN Mini-PCI Card
(User-Replaceable)
Certain notebooks include a wireless LAN mini-PCI card under the mini-PCI door on the bottom of the
notebook.
  Caution
 
Handle the Mini-PCI card only by its edges and provide proper grounding, or you might damage the
card through electrostatic discharge.
Required Equipment
 • Small Phillips screwdriver.
Removal Procedure
 1. Unplug the AC adapter, if present, and then remove the battery.
 2....