Kirisun DP485 User manual

V220927 Kirisun Communications Co.,Ltd.
Professional wireless communication system solution supplier
DP485
SERVICE MANUAL

DP485 Service Manual
I
Contents
1.Overview...................................................................................................................................................... 1
1.1. Range of Application.............................................................................................................................. 1
1.2. Safety Precaution .................................................................................................................................. 1
1.3. Maintenance Service.............................................................................................................................1
2.External View and Keys.............................................................................................................................. 2
2.1. External View......................................................................................................................................... 2
2.2. Programmable Keys..............................................................................................................................3
2.3. LED Indicator......................................................................................................................................... 4
3.Basic Operation .......................................................................................................................................... 5
3.1. Powering On/Off....................................................................................................................................5
3.2. Selecting a Channel...............................................................................................................................5
3.3. Adjusting Volume...................................................................................................................................5
3.4. Initiating a Call.......................................................................................................................................5
3.5. Receiving a Call..................................................................................................................................... 5
3.6. Calling Back........................................................................................................................................... 5
4.Circuit Description...................................................................................................................................... 6
4.1. Circuit Diagram of Main Board .............................................................................................................. 6
4.2. RF Circuit Diagram................................................................................................................................ 6
4.3. Baseband Circuit Diagram.....................................................................................................................7
4.4. TX Circuit............................................................................................................................................... 7
4.5. RX Circuit............................................................................................................................................... 8
4.6. Power Section........................................................................................................................................8
4.7. IC Description........................................................................................................................................9
4.7.1. Features of AT1846S...................................................................................................................... 9
4.7.2. Port Description of AT1846S........................................................................................................10
4.7.3. Port Description of Master Chip HS8851......................................................................................11
4.7.4. Feature Description of Semiconductor Devices...........................................................................15
5.Feature Description and Parameter Setting .......................................................................................... 15
5.1. Stun, Revive and Remote Monitor ......................................................................................................15
5.2. Scan.....................................................................................................................................................16
5.3. Zones................................................................................................................................................... 16
5.4. Setting.................................................................................................................................................. 16
5.5. TOT (Time-Out-Timer)......................................................................................................................... 17
5.6. EmergencyAlarm ................................................................................................................................ 17
5.7. Settings................................................................................................................................................18
5.8. Upgrade...............................................................................................................................................19
6.Assembly and Disassembly .................................................................................................................... 20
6.1. Installing and Uninstalling the Battery.................................................................................................20
6.2. Installing and Uninstalling the Antenna...............................................................................................21
6.3. Installing and Uninstalling Belt Clip.....................................................................................................22
6.4. Using an Earphone..............................................................................................................................22
6.5. Detaching Shell from the Base............................................................................................................23
6.6. Detaching Main Board from the Base .................................................................................................23
6.7. Explosion Diagram...............................................................................................................................24

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7.Debugging ................................................................................................................................................. 27
7.1. Debugging Method ..............................................................................................................................27
7.1.1. Components needed for adjustment.................................................................................................27
7.1.2. PC Test Mode Modulation Method....................................................................................................27
7.2. Radio Test............................................................................................................................................28
8.General Specification............................................................................................................................... 29
9.Equipment for Maintenance and Test..................................................................................................... 30
10. Troubleshooting.................................................................................................................................... 30
Appendix 1 Abbreviations........................................................................................................................... 31
Appendix 2 Material List (Electronic Part)................................................................................................. 32
Table 1 Material List of Main Board 400~470MHz......................................................................................... 32
Table 2 Material List of Main Board 137~174MHz......................................................................................... 45
Table 3 Material List of Module Board............................................................................................................58
Appendix 3 Material List (Structural Section)........................................................................................... 59
Appendix 4 Accessory List.......................................................................................................................... 62
Appendix 5 Schematic Diagrams and Layout Drawings.......................................................................... 63
Schematic Diagrams of Main Board...............................................................................................................63
Top-Layer Layout Drawing of Main Board...................................................................................................... 69
Bottom-Layer Layout Drawing of Main Board................................................................................................70
Schematic Diagrams of Module Board...........................................................................................................71
Top-Layer Layout Drawing of Module Board..................................................................................................74

DP485 Service Manual
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1.Overview
1.1.Range of Application
This manual is intended for the maintenance of DP485 frequency-modulated handheld two-way radio, and
can be used only by the engineers and professional technicians trained by Kirisun. The parameters in this
manual are subject to change because of technology improvement. For the latest information, please
contact Kirisun or your local dealer.
Please carefully read this manual before repairing the radio.
1.2.Safety Precaution
Electromagnetic Radiation
A two-way radio generates and radiates electromagnetic energy. Kirisun two-way radios strictly conform to
Chinese and international standards of electromagnetic radiation. To ensure ideal communication and
human safety, please keep the device vertical to the ground and keep the microphone 2 ~ 5cm away from
the mouth while using the radio.
Electromagnetic Interference
To avoid electromagnetic interference, turn off the radio in a place where you are so instructed, for example,
a hospital, a health center and an airport.
Explosive Gases
You’d better shut down the radio when you are in an area with explosive gas (for example, the lower deck
of a hull, a container or transport facility of fuel oil or chemicals) or with chemical or particles, dust or
metallic dusts in the air, or near a blast area or an electric blasting detonator. Replacing or recharging the
battery in potentially explosive atmospheres is prohibited.
Damaged Antenna
You are suggested not to use the radio if the antenna is damaged. A damaged antenna may cause mild
burns when contacted with human skin.
Battery Life
To prolong the service life of the battery, avoid fully discharging the battery frequently. Please charge and
discharge the battery repeatedly if it will be not used for a long time. For satisfactory performance and
safety, you are suggested to replace the battery every two years.
Part Replacement
Pay attention to the model while replacing a part. Do not use a component not meeting the requirements of
Kirisun.
1.3.Maintenance Service
Warranty service is provided to the radio and the accessories, except in any of the following situations.

DP485 Service Manual
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⚫No provision of a valid warranty card or an original invoice
⚫Malfunction due to unpermitted disassembly, repair or modification
⚫Damage of the product due to wear, mechanical damage, burn or inlet of water
⚫Damaged product SN. or unidentifiable brand
Paid maintenance service will be provided after the warranty period. Meanwhile, we offer parts to
authorized maintenance stations and dealers at preferential prices, except those of discontinued products).
2.External View and Keys
2.1.External View
NO.
Description
NO.
Description
1
Antenna
7
Power/Volume Knob
Turn it clockwise until a click is heard to
power on the radio. Turn it
counterclockwise until a click is heard to
power off the radio.
When the radio is on, turn it to regulate
the volume.
Flashing red light: The battery is low.
2
Lower /Upper Side Key (Programmable)
Programmable by a dealer to achieve.
8
LED Indicator
Red light on: The radio is transmitting
signals.
Green light on: The radio is receiving

DP485 Service Manual
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signals.
3
PTT Key
Press it to make a call and talk.
9
Microphone
Input voice.
4
Programmable Key (UsuallyAlarm Key)
10
External Interface
Connect to an external earphone or
programming cable.
5
Speaker
Output voice.
11
Belt Clip
6
Channel Knob
Rotate it to select one from the channels
1 to 16.
12
Battery Latch
2.2.Programmable Keys
To cater to users’habits of operating the radio, programmable keys (i.e. side keys) are provided, which can
be configured as shortcut keys through programming by the dealer.
Note:
⚫Press: Press down and release quickly.
⚫Press and hold: Press down and hold still for a period, which is set through the CPS (customer
programming software).
NO.
Programming
Function
Function Description
1
None
The radio does not respond when this key is pressed.
2
Battery Level
Announcement
Announce the current battery level.
3
High/Low Power
Switch to high/low power.
4
Broadcast Call
Initiate a broadcast call.
5
Monitor
Switch to carrier squelch mode (i.e. cancel CTCSS) when the selected
analogue channel is CTCSS enabled. If carrier is matched, voice will
be output.
To go back to the previous state, press the key again.
6
Emergency On
Send an emergency alarm. It is used to seek help under emergency.
7
Emergency Off
Exit emergency alarm.

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NO.
Programming
Function
Function Description
8
Squelch On/Off
Under analogue channel, open voice reception path to receive weak
signals.
Under digital channel, no response when this key is pressed.
9
Zone Selection
Switch to next zone.
10
Scan
Start/stop scanning other channels and receive traffic from them.
11
Alert Tone On/Off
Enable/disable all alert tones.
12
Nuisance Delete
Delete an unnecessary channel (e.g. interference channel) dwelled on
during scan, and then continue scan.
13
Repeater/Talk
Around
On a repeater channel, press it to enter/exit repeater mode.
2.3.LED Indicator
LED Indication
Radio State
Red light on
Transmitting signals.
Green light on
Receiving signals.
Red Light Flashing
Low battery. Please charge it.
Green Light Flashing
Scanning channels
Orange Light Flashing
In call hold state under digital mode. Exit when hold time is up.
Orange Light on
The channel unusable. Switch to another channel to quit.
Red Light Flashing Fast
CPS is reading configurable parameters of the radio.
Green Light Flashing Fast
CPS is programming configurable parameters of the radio.

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3.Basic Operation
3.1.Powering On/Off
To power on the radio, rotate the Power/Volume knob clockwise until a click is heard.
To power off the radio, rotate the Power/Volume knob counterclockwise until a click is heard.
3.2.Selecting a Channel
When the radio is on, rotate the Channel knob to select a channel.
3.3.Adjusting Volume
When the radio is on, rotate the Power/Volume knob clockwise to increase the volume or counterclockwise
to decrease it.
3.4.Initiating a Call
If the selected channel is digital, you can call the default contact for the selected channel by pressing the
PTT key. This contact can be set by the dealer through programming.
3.5.Receiving a Call
When the radio receives RF signals on the selected channel and the squelch level is reached, the green
LED glows to indicate that carrier is received.
When the selected channel is digital channel and when it received individual call, group call or all call, the
radio will output the voice from the channel.
When the channel is analogue channel and when it received analogue signals with CTCSS matching the
one on this channel (or there is no CTCSS set on the channel), the radio will output voice form the channel.
3.6.Calling Back
When the selected channel is digital channel and after a call is received, press the PTT button within the
calling duration to call back. If the calling duration is up, you need to initiate a call. The calling duration can
be set by the dealer.
When the selected channel is analogue channel and after a call is received, press the PTT button and
speak to the microphone to call back.

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4.Circuit Description
4.1.Circuit Diagram of Main Board
4.2.RF Circuit Diagram
HS8851

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4.3.Baseband Circuit Diagram
4.4.TX Circuit
The TX circuit includes an RF power amplification circuit, a low pass filter circuit and an automatic power
control circuit.
⚫RF Power Amplification Circuit
RDA1846S outputs RF signal from pin 18 and enters first-level pre-drive amplifier (Q502) for initial
amplification; then it enters second-level pre-drive amplifier (Q503) and drive amplifier (Q501) for further
power amplification, ensuring sufficient drive power signal can be offered to final amplifier for ultimate
power amplification; after amplification by multiple amplifiers, the transmitted signal will complete the output
impedance match at the output terminal of final power amplifier through a section of microstripe, so as to
minimize output power loss from impedance match failure; afterwards, the transmitted signal will enter the
low pass filter through TX/RX switch.
⚫Low Pass Filter Circuit
The low pass filter which suppresses harmonic wave is an advanced Chebyshev filter composed of lumped
parameter inductor and capacitor. On a certain basis of in-band fluctuation, the filter can improve
suppression to out-of-band harmonic wave and spurious signal.
⚫Automatic Power Control Circuit (APC)
In the automatic power control circuit, the drain current from drive power amplifier and final power amplifier
completes switch from current to voltage through the sampling resistor and subtraction circuit which is
made of the first operational amplifier; the voltage will be compared with the APC control voltage output
HS8851