DP580 Service Manual
Contents
1. Overview ....................................................................................................................................................................... 1
1.1. Range of Application ...................................................................................................................................................... 1
1.2. Safety Precaution ........................................................................................................................................................... 1
1.3. Maintenance Service ..................................................................................................................................................... 1
2. 2 External View and Keys ............................................................................................................................................... 2
2.1. External View ................................................................................................................................................................. 2
2.2. Programmable Keys ....................................................................................................................................................... 3
2.3. LED Indicator .................................................................................................................................................................. 4
3. Basic Operation .............................................................................................................................................................. 4
3.1. Powering On/Off ............................................................................................................................................................ 4
3.2. Selecting a Channel........................................................................................................................................................ 4
3.3. Adjusting Volume ........................................................................................................................................................... 4
3.4. Initiating a Call ............................................................................................................................................................... 4
3.5. Receiving a Call .............................................................................................................................................................. 5
3.6. Calling Back .................................................................................................................................................................... 5
4. Circuit Description.......................................................................................................................................................... 6
4.1. Main Board .................................................................................................................................................................... 6
4.2. Tx Circuit ........................................................................................................................................................................ 7
4.3. Rx Circuit ........................................................................................................................................................................ 8
4.4. Audio Amplification Circuit ............................................................................................................................................ 9
4.5. Frequency Synthesis Circuit ........................................................................................................................................... 9
4.6. Other Circuits ............................................................................................................................................................... 10
4.7. Power Supply ............................................................................................................................................................... 10
4.8. Port Definition for Master Chip LT1901 ....................................................................................................................... 10
5. Feature Description and Parameter Setting .................................................................................................................. 13
5.1. Stun, Revive and Remote Monitor ............................................................................................................................... 13
5.2. Scan ............................................................................................................................................................................. 14
5.3. Zones ........................................................................................................................................................................... 14
5.4. Setting .......................................................................................................................................................................... 14
5.5. TOT (Time-Out-Timer) ................................................................................................................................................. 15
5.6. Emergency Alarm ......................................................................................................................................................... 15
5.7. Settings ........................................................................................................................................................................ 16
5.8. Upgrade ....................................................................................................................................................................... 17
6. Assembly and Disassembly .......................................................................................................................................... 17
6.1. Installing and Uninstalling the Battery ......................................................................................................................... 17
6.2. Installing and Uninstalling the Antenna ....................................................................................................................... 18
6.3. Installing and Uninstalling Belt Clip .............................................................................................................................. 18
6.4. Using an Earphone ....................................................................................................................................................... 19
6.5. Detaching Housing from the Base ............................................................................................................................... 19
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