HP SM 1800t, 1800, XL280, XL390 Maintenance and Service Guide ch7removal
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Removal & Replacement
This chapter details the necessary preparations for disassembling the Notebook and
explains removing and replacing each component of the Presario 1800XL Series Notebooks.
Electrostatic Discharge
CAUTION: When removing or replacing parts, be careful to discharge static
electricity before touching the Notebook’s internal components.
Ä
A sudden discharge of static electricity from a finger or other conductor can destroy
static-sensitive devices and microcircuitry. Often the spark is neither felt nor heard, but
damage occurs. An electronic device exposed to an electrostatic discharge may work
perfectly throughout a normal cycle. However, the discharge degrades internal layers,
which reduces the operating life of the device. Networks built into many integrated circuits
provide some protection, but in many cases the discharge still contains enough power to
alter device parameters or melt silicon junctions.
The table below shows the amount of static electricity generated by common activities
associated with servicing computers.
Generated Electrostatic Voltage
Activity
Walking across carpet 35,000 V 15,000 V 7,500 V
Walking across vinyl floor 12,000 V 5,000 V 3,000 V
Motions of bench worker 6,000 V 800 V 400 V
Removing DIPS from plastic tubes 2,000 V 700 V 400 V
Removing DIPS from vinyl trays 11,500 V 4,000 V 2,000 V
Removing DIPS from styrofoam 14,500 V 5,000 V 3,500 V
Removing bubble pack from PCBs 26,000 V 20,000 V 7,000 V
Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V
CAUTION: As little as 700 Volts can degrade Notebook components. Be sure to
ground yourself before touching the Notebook or its subassemblies.
Ä
Relative Humidity
10% 40% 55%
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Required Tools
The following items are required to service the Notebook:
• Torx T-8 screwdriver
• 5 mm nut drivers (for screwlocks and standoffs)
• Small standard screwdriver
• Small Phillips screwdriver
Screws
The screws used in the Notebook are not interchangeable. If an incorrect screw is used
during the reassembly process, it can damage the unit. Compaq strongly recommends that
all screws removed during disassembly be kept with the part that was removed, then
returned to their proper locations.
Important: As each subassembly is removed from the Notebook, place it together with
its screws away from the work area to prevent damage.
Connectors & Plastic Parts
Plastic parts can be damaged by the use of excessive force during dissassembly and
reassembly. When handling plastic parts, use care. Apply pressure only at the points
designated in the instructions.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
ZIF Connector
The 1800XL Notebooks use many zero insertion force (ZIF) connectors on the system
board.
CAUTION: A ZIF connector and its attached cable can be easily damaged. Handle
only the connector slide when removing or replacing a cable. Never pull or twist on
Ä
the cable while it is connected.
To remove a cable from a ZIF connector, lift both corners of the ZIF connector and slide the
cable straight out with constant light pressure.
CAUTION: When servicing these Notebooks, make sure that cables are placed in
their proper locations during the reassembly process. Improper cable placement
Ä
can damage the Notebook.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Cables
Most cables used in the Notebook are ribbon cables.
Cables must be handled with extreme care to avoid damage. Use the following precautions
when handling cables to avoid damage to the cable and the Notebook:
• Always handle cables by their connectors.
• In all cases, avoid bending, twisting, pulling, or tearing cables.
• Apply only the minimum pressure required to seat or unseat cables from their
connectors.
• Make sure that cables are routed in such a way that they cannot be caught or
snagged by parts being removed or replaced.
• Handle flex cables with extreme care; they can tear easily.
CAUTION: When servicing a Notebook, make sure that cables are placed in their
proper locations during the reassembly process. Improper cable placement can
Ä
cause severe damage to the unit.
The following illustrations show the proper placement for each cable:
• Hard Drive Ribbon Cable
• Speaker Assembly Cable
• CD/DVD Ribbon Cable • Keyboard Ribbon Cable
• Diskette Drive Ribbon Cable
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Hard Drive Ribbon Cable
The position for the hard drive ribbon cable is shown below.
CAUTION: When servicing this Notebook, make sure that cables are placed in
their proper locations during the reassembly process. Improper cable placement
Ä
can damage the Notebook.
The following illustrations show the proper placement for other cables in the unit:
• CD/DVD Ribbon Cable
• Speaker Assembly Cable
• Diskette Drive Ribbon Cable • Keyboard Ribbon Cable
To remove or replace the hard drive, see Hard Drive Removal Procedures
later in this
chapter.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
CD/DVD Ribbon Cable
The position for the CD/DVD drive ribbon cable is shown below.
CAUTION: When servicing this Notebook, make sure that cables are placed in
their proper locations during the reassembly process. Improper cable placement
Ä
can damage the Notebook.
The following illustrations show the proper placement for other cables in the unit:
• Hard Drive Ribbon Cable
• Speaker Assembly Cable
• Diskette Drive Ribbon Cable • Keyboard Ribbon Cable
To remove or replace the CD or DVD drive, see CD/DVD Drive Removal Procedures
this chapter.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
later in
1800 S
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Diskette Drive Ribbon Cable
The position for the diskette drive ribbon cable is shown below.
CAUTION: When servicing this Notebook, make sure that cables are placed in
their proper locations during the reassembly process. Improper cable placement
Ä
can damage the Notebook.
The following illustrations show the proper placement for other cables in the unit:
• Hard Drive Ribbon Cable
• Speaker Assembly Cable
• CD/DVD Ribbon Cable • Keyboard Ribbon Cable
To remove or replace the diskette drive, see Diskette Drive Removal Procedures
later in this
chapter.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Speaker Assembly Cable
The position for the speaker assembly cable is shown below. The cable is routed under the
battery charger board and under the edge of the system board.
CAUTION: When servicing the Notebook, make sure that cables are placed in
their proper locations during the reassembly process. Improper cable placement
Ä
can damage the Notebook.
The following illustrations show the proper placement for other cables in the unit:
• Hard Drive Ribbon Cable
• Diskette Drive Ribbon Cable
• CD/DVD Ribbon Cable • Keyboard Ribbon Cable
To remove or replace the speaker assembly, see Speaker Assembly Removal Procedures
later in this chapter.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
1800 S
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Keyboard Ribbon Cable
The position for the keyboard ribbon cable is shown below.
CAUTION: When servicing the Notebook, make sure that cables are placed in
their proper locations during the reassembly process. Improper cable placement
Ä
can damage the Notebook.
The following illustrations show the proper placement for other cables in the unit:
• Hard Drive Ribbon Cable
• Diskette Drive Ribbon Cable
• CD/DVD Ribbon Cable • Speaker Assembly Cable
To remove or replace the keyboard, see Keyboard Removal Procedures
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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later in this chapter.
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Preparing the Notebook for Disassembly
Before beginning the removal or replacement of any Notebook components, complete the
following steps:
1. Disconnect AC power source and any external devices.
2. Disconnect the Notebook from the QuikDock (pg 11
3. Remove any PC cards.
4. Remove the battery pack (pg 12
Important: The battery pack should be removed before performing any internal
maintenance on the Notebook.
CAUTION: Metal objects can damage the battery pack as well as the battery
contacts in the battery compartment. To prevent damage, do not allow metal
Ä
objects to touch the battery contacts. Place only the battery pack for the Compaq
Presario 1800 Series Notebooks in the battery compartment. Do not force the
battery pack into the bay if insertion is difficult.
CAUTION: Do not crush, puncture, or incinerate the battery pack. Do not open a
battery pack; this damages the pack, makes it unusable, and exposes potentially
Ä
harmful battery components. No field-serviceable parts are located inside the
battery pack.
Note: The Compaq Presario 1800 Series Notebooks have several screws of various
sizes that are not interchangeable. Care must be taken during reassembly to
ensure that the correct screws are used in their correct locations. During removal,
keep screws with their associated subassembly.
).
).
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Important: As each component is removed from the Notebook, place the it
together with its screws away from the work area to prevent damage.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Removal Procedures
This section outlines the removal and replacement of each component of the 1800XL Series
Notebooks. To prepare the Notebook for disassembly, refer to the previous sections of this
chapter.
QuikDock
To disconnect from the QuikDock, lift the handle on top of the QuikDock to release the
Notebook and lift the Notebook straight up.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Battery Pack
To remove the battery pack, complete the following steps:
1. Slide the battery pack compartment door down and remove it from the chassis
2. Pull the battery pack from the chassis by the tab located on the end of the battery
2
pack
.
1
.
To replace the battery pack, reverse these procedures.
Important: The battery pack should be removed before performing any internal
maintenance on the Notebook.
CAUTION: Metal objects can damage the battery pack as well as the battery
contacts in the battery compartment. To prevent damage, do not allow metal
Ä
objects to touch the battery contacts. Place only the battery pack for the Compaq
Presario 1800 Series Portable Notebooks into the battery compartment. Do not
force the battery pack into the bay if insertion does not occur easily.
CAUTION: Do not crush, puncture, or incinerate the battery pack. Do not open a
battery pack; this damages the pack, makes it unusable, and exposes potentially
Ä
harmful battery components. No field-serviceable parts are located inside the
battery pack.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Palmrest Cover with TouchPad
Note: It is not necessary to remove the display panel assembly to access the interior
components of the Notebook.
To remove the Palmrest cover with TouchPad, complete the following steps:
1. Prepare the Notebook for disassembly (pg 10
).
2. Close the display and turn the Notebook upside down.
3. Remove four screws from the bottom of the Notebook, and one from the battery
compartment.
Continued on the next page.
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
4. Turn the Notebook right side up and open the display.
5. Lift up the front end of the Palmrest cover.
Note: It may be necessary to apply pressure on the sides of the Palmrest cover to
release it from the chassis.
Continued on the next page.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
6. Disconnect the flex cable from the ZIF Connector on the DisqPlay module.
To replace the Palmrest cover with TouchPad, reverse these procedures.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Keyboard
To remove the keyboard, complete the following steps:
1. Prepare the Notebook for disassembly (pg 10
2. Remove the Palmrest cover (pg 13
).
).
3. Gently lift the front of the keyboard, disconnect the flex cable from the ZIF Connector
on the system board, and remove the keyboard.
To replace the keyboard, reverse these procedures.
Note: When replacing the keyboard, the Keyboard Ribbon Cable should fold behind the
ZIF Connector
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and not underneath the keyboard.
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RESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE
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