SONY VGNA290
Service Manual

Information in this document is subject to change without notice. Sony, VAIO and CLIE are trademarks or registered trademarks of Sony. Microsoft, Windows, Windows Media, Outlook, Bookshelf and other Microsoft products are trademarks or registered trademarks of Microsoft Corporation in the United States and other countries. The word Bluetooth and the Bluetooth logo are trademarks of Bluetooth SIG, Inc. AMD, AMD logo, AMD Duron and combinations thereof, 3DNow!, are trademarks of Advanced Micro Devices, Inc. Intel Inside logo, Pentium and Celeron are trademarks or registered trademarks of Intel Corporation. Transmeta, the Transmeta logo, Crusoe Processor, the Crusoe logo and combinations thereof are trademarks of Transmeta Corporation in the USA and other countries. Graffiti, HotSync, PalmModem, and Palm OS are resistered trademarks, and the Hotsync logo and Palm are trademarks of Palm, Inc. or its subsidiaries. (M) and Motrola are trademarks of Motrora, Inc. Other Motrola products and services with (R) mark like Dragomball are the trademarks of Motrola, Inc. All other names of systems, products and services in this manual are trademarks or registered trademarks of their respective owners. In this manual, the (TM) or (R) mark are not specified.

Caution Markings for Lithium/Ion Battery - The following or similar texts shall be provided on battery pack of equipment or in both the operating and the service instructions. CAUTION: Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer�s instructions. CAUTION: The battery pack used in this device may present a fire or chemical burn hazard if mistreated. Do not disassemble, heat above 100°C (212°F) or incinerate. Dispose of used battery promptly. Keep away from children. CAUTION: Changing the back up battery. � Overcharging, short circuiting, reverse charging, multilation or incineration of the cells must be avoided to prevent one or more of the following occurrences; release of toxic materials, release of hydrogen and/or oxygen gas, rise in surface temperature. � If a cell has leaked or vented, it should be replaced immediately while avoiding to touch it without any protection.

Service and Inspection Precautions
1. Obey precautionary markings and instructions
Labels and stamps on the cabinet, chassis, and components identify areas requiring special precautions. Be sure to observe these precautions, as well as all precautions listed in the operating manual and other associated documents. screws, components, and wiring have been returned to their original condition. Also check the area around the repair location to ensure that repair work has caused no damage, and confirm safety.

5. When replacing chip components...
Never reuse components. Also remember that the negative side of tantalum capacitors is easily damaged by heat.

2. Use designated parts only
The set�s components possess important safety characteristics, such as noncombustibility and the ability to tolerate large voltages. Be sure that replacement parts possess the same safety characteristics as the originals. Also remember that the 0 mark, which appears in circuit diagrams and parts lists, denotes components that have particularly important safety functions; be extra sure to use only the designated components.

6. When handling flexible print boards...
� The temperature of the soldering-iron tip should be about 270C. � Do not apply the tip more than three times to the same pattern. � Handle patterns with care; never apply force. Caution: Remember that hard disk drives are easily damaged by vibration. Always handle with care.
ATTENTION AU COMPOSANT AYANT RAPPORT � LA S�CURIT�! LES COMPOSANTS IDENTIF�S PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCH�MATIQUES ET LA LISTE DES PI�CES SONT CRITIQUES POUR LA S�CURIT� DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PI�SES SONY DONT LES NUM�ROS SONT DONN�S DANS CE MANUEL OU DANS LES SUPP�MENTS PUBLI�S PAR SONY.

3. Always follow the original design when mounting parts and routing wires
The original layout includes various safety features, such as inclusion of insulating materials (tubes and tape) and the mounting of parts above the printer board. In addition, internal wiring has been routed and clamped so as to keep it away from hot or high-voltage parts. When mounting parts or routing wires, therefore, be sure to duplicate the original layout.

4. Inspect after completing service
After servicing, inspect to make sure that all

Confidential
VGN-A51PS1/A51PS2/A51S1/A51S2/A61B/A71PS/A71S VGN-A230/A230B/A230P/A240/A240B/A240P/A250/A260/A270/A270B/A270P/A290/A290F VGN-A215M/A215Z/A217M/A217S/A295HP/A297XP VGN-A21C/A23CP/A29CP/A29GP/A29LP/A29SP/A29TP

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