Principles and Maintenance Diagrams of the Novel Cordless Telephone Practical Unit Circuit

Author: Sun Yu Kai
Publisher:
Publish Date: 2004-01-01
Features: There are a wide variety of domestic and imported cordless phones, and their ownership in society is substantial, with an increasing number of repairs being conducted. However, based on their circuit structures and the components used, they can be categorized into the types discussed in this book. As a result, the unit circuits provided in this book cover most models currently available in the market. This book serves as both a practical, comprehensive, easy-to-understand, illustrated, and highly readable reference book, as well as a guide that enables readers to generalize and apply knowledge to different scenarios in cordless phone principles and maintenance. It is a collection of illustrations (hereinafter referred to as "illustrations") that pairs unit circuit diagrams with explanatory text on principles and maintenance, compiling circuits commonly used in most cordless phones. From this, readers can access circuit diagrams, circuit principles, fault analysis, and guidance on maintenance knowledge and techniques, making it a systematic, practical book that combines the functions of a toolbook, reference material, and introductory guide. The book presents 110 practical functional unit circuit diagrams of widely used imported and domestic cordless phones in China, categorized into main host RF, microprocessor and its peripheral circuits, calls, caller display, dialing, power supply, and mobile phone RF based on the functions of cordless phone signal processing unit circuits. Each unit circuit diagram is accompanied by corresponding circuit principles and fault analysis explanations. In the illustrations, graphical symbols and text annotations are used to indicate the power supply, phone signals, and control signals of the circuit, along with their incoming and outgoing locations and processing flow. Relevant repair data are also listed for reference at the end of each section. Additionally, the working principles, signal flow, and phenomena and causes of channel faults are explained in comparison with the circuit diagrams. The selected unit circuit diagrams cover most domestic and imported cordless phone models currently available. This book is suitable for engineers, technicians, maintenance personnel, students, and. It can also serve as a training textbook for maintenance personnel and dual-use talents in both military and civilian fields, as well as for self-study by users.