This comprehensive service repair manual for the Samsung SGH-A400 mobile phone is an essential resource for technicians and repair professionals. It provides detailed instructions and diagrams for troubleshooting, disassembling, repairing, and reassembling the device. The manual covers a wide range of topics, including:

* **Hardware Components:** Detailed descriptions and specifications of all internal and external components, including the motherboard, display, keypad, battery, antenna, and more.
* **Troubleshooting Procedures:** Step-by-step guides for diagnosing common problems, such as power issues, display malfunctions, connectivity problems, and software errors.
* **Repair Techniques:** Comprehensive instructions for replacing faulty components, including detailed diagrams and tips for proper soldering and desoldering techniques.
* **Schematic Diagrams:** Clear and accurate schematics of the phone's circuitry, allowing for in-depth analysis and understanding of its electrical functions.
* **Service Notes:** Important tips and suggestions for technicians, including common repair pitfalls and best practices for maintaining the phone's performance.

This manual is an invaluable tool for any individual involved in the repair and maintenance of the Samsung SGH-A400 mobile phone.

The Samsung SGH-A400, a mobile phone released in 2004, was a compact and stylish device that offered a blend of essential features and contemporary design. It boasted a clamshell form factor, a vibrant color display, and a user-friendly interface, making it a popular choice for both casual and business users. The phone's sleek appearance, adorned with a silver finish and adorned with the Samsung logo, exuded an air of sophistication. Featuring a digital color display with a resolution of 128x160 pixels and a TTF (True Type Font) display, the SGH-A400 provided clear and sharp visuals for navigating menus and viewing multimedia content. The phone's compact dimensions made it easy to slip into a pocket or purse, while its weight provided a reassuring sense of quality.

Powering the SGH-A400 was a versatile suite of features designed to enhance communication and entertainment. The phone supported GSM connectivity, ensuring reliable communication within supported networks. Its integrated speakerphone allowed for hands-free conversations, while the built-in polyphonic ringtones and vibration alert provided customizable and discreet notification options. A noteworthy feature was the SGH-A400's support for multimedia messaging (MMS), allowing users to send and receive images, videos, and audio clips. The phone also featured a built-in FM radio, providing access to a diverse range of radio stations. The SGH-A400's built-in camera captured still images and videos, letting users document their experiences and share them with friends and family. The phone's expandable memory enabled users to store a substantial amount of data, including images, videos, and music files. This combination of features contributed to the SGH-A400's enduring appeal, making it a practical and enjoyable mobile device for its time.