"Digital TV Set-Top Box" is a transformation device that converts digital TV signals into analog signals. It decodes and restores digitally compressed image and audio signals, producing analog video and audio signals to provide high-quality TV programs to viewers through TV displays and audio devices. Currently, the market offers various conditional access (CA), downloaders, electronic program guides (EPG), data broadcasting, and middleware systems, with a wide range of value-added applications. This significantly raises the barriers for set-top box manufacturers in terms of research and development, production, market promotion, and technical support, making mass production, cost reduction, and reliability improvement of set-top boxes challenging.

Eastdo Technology is a high-tech enterprise dedicated to reverse engineering research, offering professional services such as multi-layer circuit board copying, photomask output, BOM (bill of materials) production, and schematic reverse engineering. In conjunction with chip decryption, PCB production, PCB modification, and prototype production, Dongdao Technology provides customers with a worry-free one-stop solution, assisting them in product reference design and technical research application. The production technology of digital TV set-top box circuit boards has been fully mastered and can be mass-produced. Here is a brief introduction to the digital TV set-top box circuit board:

The structure of the set-top box is relatively simple, generally consisting of several main components, including the main chip, memory, tuning and demodulation, feedback channel, Conditional Access (CA) interface, external storage controller, audio-video output, etc. The main components are the main chip and tuning and demodulation, which largely determine the performance and price of the set-top box.

Basic Parameters:

• Product Type: Standard Definition Set-Top Box
• Set-Top Box Memory: 16-32MB
• Processor Type: STi5105
• Video Decoding: ISO/IEC 13818-2 MP@M
• Audio Decoding: ISO/IEC 13818-3 LAYER I&II

Input and Output:

• Video Interface: YCbCr/S-Video Component Video Output Terminal
• Audio Interface: Digital Audio SPDIF Fiber, Coaxial Output Terminal
• Other Interfaces: RS-232 Interface, Ethernet Interface

Other Parameters:

• Power Supply Voltage: 175-250V, 50-60Hz
• Maximum Power Consumption: 20W

After the implementation of the Ministry of Industry and Information Technology's (MIIT) Digital TV Conditional Access Separation Standard in 2010 (Technical Specification SJ/T 11336-2006 and Testing Specification SJ/T 11337-2006), it brings several advantages. Firstly, it can reduce the functionality and cost of the set-top box. Secondly, it can add functions through this expansion interface, leading to value-added services and increased revenue. Thirdly, it enables voluntary expansion services for the general public, reducing redundant investment. Fourthly, it effectively supports the production and development of integrated digital TV sets (incorporating the set-top box into the TV). Lastly, it promotes the "appliance-ization" of digital TV set-top boxes, shifting sales outlets from network companies to home appliance malls, allowing users to choose set-top box brands independently and reducing the sales and after-sales service pressure on network companies.

Regarding digital TV set-top boxes, they represent important technological achievements in Eastdo Technology's field of whole-machine replication, PCB design, chip decryption, and other reverse engineering research. The company is also capable of conducting secondary development from the customer's perspective, meeting various needs and becoming a leading player in the industry with its strong technical strength.