Kirisun FP520, Service Manual

FP520 Service Manual 

Page 1 of 64 

Contents 

Chapter 1 Overview ................................................................................................................................... 3 

1. 1 Introduction ......................................................................................................................................... 3 

1.2 Safety Precautions ............................................................................................................................... 3 

Chapter 2 External View and Functional Keys ........................................................................................... 4 

2.1 External View ....................................................................................................................................... 4 

2.2 Functional Key Description .................................................................................................................. 4 

2.3 LED Indicator ....................................................................................................................................... 5 

Chapter 3 Circuit Description ..................................................................................................................... 6 

3.1 Overview .............................................................................................................................................. 6 

3.2 Frequency Configuration ...................................................................................................................... 6 

3.3 Principle of Receiver (RX) .................................................................................................................... 6 

3.4 Principle of Transmitter (TX) ................................................................................................................ 7 

3.5 Principle of Frequency Synthesizer ...................................................................................................... 8 

3.6 Audio Processing Circuit ...................................................................................................................... 9 

3.7 Power Supply ....................................................................................................................................... 9 

3.8 MCU Unit ........................................................................................................................................... 10 

3.9 Semiconductor Device Description .................................................................................................... 11 

Chapter 4 Function Description and Parameter Settings ......................................................................... 16 

4.1 Time-out Timer ................................................................................................................................... 16 

4.2 Channel Scan .................................................................................................................................... 16 

4.3 Kill and Activation ............................................................................................................................... 16 

4.4 Emergency ......................................................................................................................................... 16 

4.5 Parameter Settings ............................................................................................................................ 17 

Chapter 5 Assembly and Disassembly ..................................................................................................... 18 

5.1 Installing/Removing the Battery ......................................................................................................... 18 

5.2 Installing/Removing the Antenna (see Fig. 20)................................................................................... 19 

5.3 Installing/Removing the Belt Clip (see Fig.21) ................................................................................... 19 

5.4 Installing the Earphone (see Fig. 22) ................................................................................................. 19 

5.5 Separating the Front Cover from the Chassis (see Fig. 23) ............................................................... 20 

5.6 Separating the PCB Board from the Chassis (See Fig. 24) ............................................................... 20 

5.7 Exploded View ................................................................................................................................... 20 

Chapter 6 Adjustment .............................................................................................................................. 23 

6.1 Method of Adjustment ........................................................................................................................ 23 

6.2 Radio Test .......................................................................................................................................... 24 

Chapter 7 Major Specifications ................................................................................................................ 25 

7.1 General Specification ......................................................................................................................... 25 

7.2 RX Part .............................................................................................................................................. 26 

7.3 TX Part ............................................................................................................................................... 26 

Chapter 8 Service and Test Equipment .................................................................................................... 27 

Chapter 9 KBC-51 Charger ...................................................................................................................... 28 

9.1 The Operational Conditions and Basic Specification of Charger ........................................................ 28 

9.2 Function Introduction ......................................................................................................................... 28