Kirisun DP990 Service Manual

DP990/DP995service manual
1
CATELOG
1. Overview ......................................................................................................................................................................... 3
1.1. Range of Application ....................................................................................................................................................3
1.2. Safety Precautions ........................................................................................................................................................ 3
1.3. Maintenance Service .................................................................................................................................................... 3
2. Appearance and LED Indicator .......................................................................................................................................4
2.1. Appearance ................................................................................................................................................................... 4
2.2. LED Indicator ...............................................................................................................................................................5
3. Circuit Description .......................................................................................................................................................... 6
3.1. Overall Circuit ..............................................................................................................................................................6
3.2. Tx Circuit ......................................................................................................................................................................7
3.3. Rx Circuit ..................................................................................................................................................................... 8
3.4. Frequency Synthesizer Circuit ..................................................................................................................................... 9
3.5. GPS Circuit .................................................................................................................................................................10
3.6. Baseband Circuit ........................................................................................................................................................ 10
3.6.1. Power Supply Circuit .............................................................................................................................................. 10
3.6.2. Audio Circuit ........................................................................................................................................................... 11
4. Functions and Parameters ............................................................................................................................................. 12
4.1. Basic Functions .......................................................................................................................................................... 12
4.2. Advanced Functions ................................................................................................................................................... 12
4.3. Settings ....................................................................................................................................................................... 12
5. Assembly and Disassembly ...........................................................................................................................................13
5.1. Installing/Uninstalling the Battery ............................................................................................................................. 13
5.2. Installing/Uninstalling the Antenna ........................................................................................................................... 14
5.3. Installing/Uninstalling Belt Clip ................................................................................................................................ 14
5.4. Disassembling Aluminum-alloy Holder and Components of Main Part ...................................................................14
5.5. Detaching Main Board from Aluminum-Alloy Holder ............................................................................................. 15
5.6. Detaching Key Board .................................................................................................................................................15
5.7. Explosion Diagram .....................................................................................................................................................16
6. Tuning ............................................................................................................................................................................21
6.1. Preparation ..................................................................................................................................................................21
6.2. Tuning (PC Mode) ......................................................................................................................................................22
6.2.1. Frequency Bands ..................................................................................................................................................... 22
6.2.2. VCO .........................................................................................................................................................................22
6.2.3. Tx .............................................................................................................................................................................22
6.2.4. VOX ........................................................................................................................................................................ 23
6.2.5. Low Voltage (Tx) .................................................................................................................................................... 23
6.2.6. Rx ............................................................................................................................................................................ 23
6.3. Test Items (Test Mode only) .......................................................................................................................................23
6.3.1. Rx ............................................................................................................................................................................ 23
6.3.2. Tx .............................................................................................................................................................................24
7. Technical Specifications ................................................................................................................................................24
8. Repairing and Testing Devices ......................................................................................................................................25
9. Troubleshooting .............................................................................................................................................................25
Appendix 1 Material Lists and Schematic Diagrams (400~480 MHZ) ........................................................................... 27
Table 1 Material List (Electronic Part) ..............................................................................................................................27
Appendix 2 Material Lists and Schematic Diagrams (350~400 MHZ) ........................................................................... 37
Table 2 Material List (Electronic Part) ............................................................................................................................. 37
Figure 1 Top-layer Layout Drawing of Main Board .........................................................................................................46
Figure 2 Bottom-layer Layout Drawing of Main Board ...................................................................................................46
Figure 3 Top-layer Layout Drawing of Key Board ...........................................................................................................47

Kirisun DP990 Specifications

General

Brand	Kirisun
Model	DP990
Category	Two-Way Radio
Language	English