Acer Extensa 900 Maintenance Manual

Field Service    6-3
6.2.4 Password Caution
The notebook computer can be password protected to prevent unauthorized use. 
However, if the password is lost, the notebook must be returned to the Texas 
Instruments manufacturing facility in Temple, Texas U.S.A. to restore access. This 
service is not covered by warranty.
6.3 Required Tools and Equipment
All Extensa Notebook corrective maintenance procedures can be performed using the 
following tools:
¨Tweezers
¨Plastic Stick
¨Small flat-blade screwdriver...

6-4   Field Service 
Figure  6-1  Extensa 900 Series Assemblies
6.4.1 Cover-Display Assembly
The Cover -Display Assembly shown in Figure 6-2, contains the LCD screen, DC-AC 
Inverter Board, DC-DC Inverter Board, bezel LCD cover and various other components 
as listed in Table 6-1.
Mobile Productivity
Base Assembly
Notebook Assemblies
     Cover-Display Assembly
     
     Base Assembly 

Field Service    6-5
.
Figure  6-2  Display FRUs
 
Table 6-1  Top Cover Assembly Field-Replaceable Units (FRUs)
 FRU Description Assembly/
Disassembly 
ParagraphTI Part No.
PWB INVERTER, DSTN, EXT. 90X 6.5.19 9813635-0001
BEZEL, DISPLAY DSTN 12.1, EXT. 90X 6.5.17 9813636-0001
LCD PANEL, DSTN, 12.1,SHARP, EXT. 90X 6.5.18 9813637-0001
DISPLAY ASSY. DSTN, 12.1, SHARP, EXT. 90X 6.5.7 9813638-0001
CABLE, DISPLAY, DSTN, FJ, EXT. 90X 6.5.7 9813678-0001
PWB INVERTER, TFT, EXT. 90X 6.5.19 9813639-0001
BEZEL,...

6-6   Field Service 
6.4.2 System Base Assembly
As shown in Figure 6-3, the System Base Assembly houses a variety of field-replaceable 
subassemblies and components. The various assemblies and reference paragraph  
numbers containing removal/replacement procedures are listed in Table  6-2.
Figure 6-3  Notebook Base Assembly Major FRUs
Power Supply
Board
Battery Connector
Cable Assembly
Main Board
CPU 
Board
Touchpad
Assembly
TOP Cover
VGA Video
Board
PC Card
Module
LED BoardBattery Keyboard
Assembly...

Field Service    6-7
 
Table 6-2  Base Assembly Field-Replaceable Units (FRUs)
Base Assembly FRU Description Assembly/
Disassembly 
ParagraphTI Part No.
PWB Assemblies
PWB ASSY, MAIN BOARD W/O CPU, EXT. 90X 6.5.15 9813651-0001
PWB ASSY, VGA BOARD, EXT.90 X 6.5.11 9813652-0001
PWB ASSY, LED BOARD, EXT. 90X 6.5.8 9813653-0001
PWB ASSY, CPU BOARD, EXT. 90X 6.5.9 9813654-0001
PWB ASSY, DC-IN BOARD, EXT. 90X 6.5.13 9813655-0001
PWB ASSY, BATTERY BOARD, EXT. 90X 6.5.12 9813656-0001
PWB, POWER SUPPLY, EXT. 90X...

6-8   Field Service 
FDD, EXT. 90X Ref 9813649-0001
HDD BRACKET ASSY, EXT. 900 6.5.4 9813683-0001
Other Major Assemblies
CASE, UPPER, EXT. 90X 6.5.10 9813646-0001
CASE, LOWER, EXT. 90X 6.5.10 9813647-0001
BATTERY, LI-ION, EXT. 90X 6.5.1 9813633-0001
HEAT SINK, MAIN, EXT. 900 6.5.6 9813685-0001
AC ADAPTER, 45W, ADP-45HP, EXT. 6XX Ref 9813497-0004
PCMCIA MODULE, EXT. 900 6.5.14 9813716-0001
Service Manual Ref 9813715-0001
Dummy Battery (case only) EXT. 90X 6.5.1 9813717-0001
Doors, Access Covers, misc...

Field Service    6-9
6.4.3 Mobile Productivity Base Assembly
The FRU list for the MPB is provided in Table 6-3. The major MPB FRUs are identified 
in Figure 6-4.
TOUCHPAD, GND PLATE, EXT. 900 6.5.16 9813690-0001
CABLE, FLEX, LED BOARD, EXT. 90X  6.5.8 9813691-0001
Table 6-3  Mobile Productivity Base FRUs
FRU Description Assembly/
Disassembly 
ParagraphTI Part No.
PWB ASSY, CHARGER BOARD, MPB, EXT. 90X Ref 9813657-0001
CASE, BOTTOM, MPB, EXT. 90X Ref 9813658-0001
PWB ASSY, MAIN BOARD, MPB, EXT. 90X 6.6.7...

6-10   Field Service 
Figure 6-4  Mobile Productivity Base Major FRUs
6.5 Notebook FRU Replacement Procedures
The following paragraphs contain field service-level removal/replacement procedures 
for the 900 Series Notebook Computers.
Most FRU removal/replacement procedures involve connecting and disconnecting cable 
connectors. The Extensa series uses two types of connectors including:
¨Locking-type connectors - Use a plastic stick to unlock and lock these type of 
connectors as shown in Figure 6-5....

Field Service    6-11
Figure 6-5  Removing/Installing Cables with Locking-Type Connectors
6.5.1 Removing/Replacing the Notebook Battery Pack
Before performing any of the assembly/disassembly procedures, always disconnect the 
AC adapter from the notebook and remove all battery packs. The procedure for removing 
and replacing the notebook battery pack is as follows:
1.Turn off the computer and disconnect the AC adapter from the computer.
2.Unlock the battery on each side of the notebook and pull the...

6-12   Field Service 
 
Figure 6-6  Notebook Battery Removal/Replacement
6.5.2 Removing/Replacing PCMCIA Options
The procedure for removing and replacing the PCMCIA options is as follows:
1.Turn off the computer and remove the battery pack(s) as described in 
Paragraph 6.5.1.
2.Press the upper card eject button to eject the upper card, lower button 
controls the lower card and use both buttons for Type III devices.
3.To replace the PCMCIA device, remove any filler cards present and insert the 
device....