Kirisun DP405 User manual

DP405
V210629 Fujian Kirisun Communications Co.,Ltd.
Professional wireless communication system solution supplier
SERVICE MANUAL

DP405 Service Manual
Contents
1. Overview................................................................................................................................................... 1
1.1. Range of Application........................................................................................................................... 1
1.2. Safety Precautions.............................................................................................................................. 1
1.3. Maintenance Service .......................................................................................................................... 2
2. Appearance and Keys.............................................................................................................................. 2
2.1. Appearance ........................................................................................................................................ 2
2.2. Programmable Keys ........................................................................................................................... 3
2.3. LED Indication..................................................................................................................................... 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.................................................................................................................................. 4
3.6. Calling Back........................................................................................................................................ 5
4. Circuit Description................................................................................................................................... 5
4.1. Circuit Composition............................................................................................................................. 5
4.2. TX Circuit............................................................................................................................................ 5
4.3. RX Principle........................................................................................................................................ 6
4.4. Power Section..................................................................................................................................... 7
4.5. IC Characteristics
................................................................................................................................ 7
4.5.1. Characteristics of AT1846S....................................................................................................... 7
4.5.2. Port Description of AT1846S..................................................................................................... 8
4.5.3. Port Description of Master Chip HS8851 ................................................................................. 9
4.5.4. Function Description of Semiconductor Devices................................................................. 12
5. Specifications......................................................................................................................................... 13
5.1. Stun, Revive and Remote Monitor .................................................................................................... 13
5.2. Scan.................................................................................................................................................. 14
5.3. Zones................................................................................................................................................ 14
5.4. Settings............................................................................................................................................. 14
5.5. TOT （Time-out-timer）................................................................................................................... 15
5.6. Emergency Alarm.............................................................................................................................. 15
5.7. Setting............................................................................................................................................... 16
5.8. Firmware Upgrading ......................................................................................................................... 16
6. Assembly and Disassembly.................................................................................................................. 18
6.1. Installing/Uninstalling the Battery...................................................................................................... 18
6.2. Installing/Uninstalling the Antenna .................................................................................................... 19
6.3. Installing the Earphone ..................................................................................................................... 19
6.4. Detaching the Housing...................................................................................................................... 20
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DP405 Service Manual
6.5. Detaching Main Board ...................................................................................................................... 20
6.6. Explosion Diagram............................................................................................................................ 22
7. Tuning ..................................................................................................................................................... 24
7.1. Tuning Method.................................................................................................................................. 24
7.1.1. Parts for Tuning ....................................................................................................................... 24
7.1.2. Tuning in PC Test Mode .......................................................................................................... 24
7.2. Radio Testing.................................................................................................................................... 24
8. Specification........................................................................................................................................... 25
9. Maintenance and Test Equipment ........................................................................................................ 26
10. Troubleshooting ................................................................................................................................. 27
Appendix 1 Abbreviations ........................................................................................................................... 28
Appendix 2 Material List
（
Electronic section
）
......................................................................................... 29
Table 1 Material List of Main Board (400~470 MHz).................................................................................... 29
Table 2 Material List of Main Board (350~400 MHz)D ................................................................................. 42
Table 3 Material List of Main Board (136~174 MHz).................................................................................... 56
Table 4 Material List of Module Board.......................................................................................................... 70
Appendix 3 Material List (Structural Section)............................................................................................. 71
Appendix 4 Accessory List........................................................................................................................... 74
Appendix 5 Schematic Diagrams and Layout Drawing.............................................................................. 75
Schematic Diagrams of Main Board ............................................................................................................ 75
Top-Layer Layout Drawing of Main Board.................................................................................................... 80
Bottom-Layer Layout Drawing of Main Board.............................................................................................. 81
Schematic Diagrams of Module Board ........................................................................................................ 82
Layout Drawing of Module Board ................................................................................................................ 85
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DP405 Service Manual
1.Overview
1.1.Range of Application
This manual is intended for the engineers and professional technicians that are trained by Kirisun for the
maintenance and repair of DP405 frequency-modulated handheld radio. The parameters in this manual
may vary with technology improvement, so for updated technical information, please contact Kirisun or its
local dealers.
Please carefully read this manual before repairing the radio.
1.2.Safety Precautions
Electromagnetic Radiation
Radios generate and radiate electromagnetic energy. The security design of Kirisun radio meets national
and international standards on electromagnetic radiation. To ensure radio’s optimal performance and safe
electromagnetic radiation on human, please keep the radio vertical to the ground and 2 to 5 centimeters
away from the mouth.
Electromagnetic Interference
To avoid electromagnetic interference, please turn off the radio wherever there are clear warnings, e.g.
hospitals, health care centers, airports and other places where radios must be turned off.
Explosive and Harmful Gases
The radio should be turned off in areas where there are explosives and harmful gases, e.g. lower deck of
the hull, fuel and chemical storage facilities and area where the air contains chemicals, particles, dust or
metal dust.
Please turn off the radio when close to blasting area and electric blasting detonators.
Replacing or charging batteries in potentially explosive atmosphere is prohibited.
Antenna Damage
Do not use radios when the antenna is damaged. Damaged antenna may cause mild burning to 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.
Replacing Components
When replacing components, please be aware of the model number. Do not arbitrarily replace any
components that do not match Kirisun’s requirement.
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DP405 Service Manual
1.3.Maintenance Service
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.
The radio and accessory are provided with warranty service. But if one of the following occurs, no free
maintenance is offered.
No valid warranty card or original invoice.
Faults caused by unauthorized disassembly, repair and modification.
Man-made damage such as wear, mechanical damage, burning, and water logging.
Product serial number is damaged or the product brand is unable to identify.
After the warranty expired, lifetime service is still available. We also provide service components to service
station and staff at favorable price.
2.Appearance and Keys
2.1.Appearance
No. Part Name No. Part Name
1 Earphone jack 2 Model Sticker
3 Antenna 4 Channel Knob
5 Volume Knob 6 Light pipe
7 Logo sticker 8 Microphone
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DP405 Service Manual
9 Speaker 10 PTT key
11 Programmable key 12 Belt clip
13 Battery 14 Battery latch
2.2.Programmable Keys
To cater to your preference, you may have the programmable key defined as a shortcut key by the dealer
through programming using the CPS (customer programming software).
Note:
Press: Press down and release quickly.
Press and hold: Press and hold for a period set through the CPS programming software.
No. Feature Usage
1 Undefined Press the key, and the radio will not respond.
2 High/Low Power Press this key to switch to high/low power.
3 Broadcast Call Press this key to make a broadcast call.
4 Monitor
If there is CTCSS on the current analogue channel, press this key to
switch to carrier squelch mode to cancel CTCSS feature. When the
carrier is matched, the voice can be output. Press the key again to
go back to the original status.
5 Emergency Alarm Enable the emergency alarm feature to seek help in emergency.
6 Emergency Alarm Exit End emergency alarm.
7 Squelch On/Off Press this key on the analogue channel to forcibly open the voice reception path and receive weak signals on the analogue channel.
Pressing this key on digital channel is useless.
8 Zone Selection Press this key to switch to the next zone.
9 Scan Press this key to enable Scan and listen to activities on other
channels; press it again to disable Scan.
10 Alert Tone On/Off Press this key to enable all the alert tones and press it again to have
them disabled.
11 Nuisance Delete During scan, when the radio detects an unnecessary channel, e.g. interference channel, the user can select Nuisance Delete menu to
delete the channel before the scan continues.
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DP405 Service Manual
12 Repeater/Talkaround On the repeater channel, press this key to exit repeater mode.
2.3.LED Indication
LED Indication Radio Status
Red light on Emitting signals.
Red light flashing Low-battery state.
Green light on Receiving signals (e.g. voice and data), or channel activity detected.
Green light flashing Scanning for signals.
Orange light flashing In call hold state, or receiving emergency alarm.
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
In standby state, 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
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DP405 Service Manual
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.
4.Circuit Description
4.1.Circuit Composition
4.2.TX Circuit
The TX circuit is mainly composed of three parts below:
HS8851
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DP405 Service Manual
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
from DAC at the second operational amplifier, and the error voltage that is output will change the
transmitting power through the grid bias voltage of the control power amplifier tube (including the drive level
and final level ).
4.3.RX Principle
The RX circuit is mainly composed of RF low pass filter, RX/TX switch, low noise amplifier, AT1846S,
HS8851 and audio power amplifier.
RX Circuit Front-end
The signal from antenna is sent to Q507 3SK318 and low noise amplifier (LNA) which is made of peripheral
components though RX/TX switches (D500, D501, D502 and D503) for amplification, and the amplified
signal will then be sent to U500 (AT1846S) for demodulation and output.
RX Circuit Back-end
The analogue/digital signal which is demodulated and output by AT1846S, after completing demodulation
and processing of digital signal through DSP in HS8851, will be input to digital audio processor module for
further processing, and then be switched to analogue voice signal through DAC of codec; the analogue
voice signal will finally be amplified by external audio amplifier to drive the speaker.
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DP405 Service Manual
4.4.Power Section
3.6V to supply power to PMU in AT1846S (i.e. RDA1846S) and HS8851 through DC-DC switch; 3M, 3C
and USB3.3V output from PMU separately supplies power to other baseband circuits; the battery outputs
5V voltage through LDO and then outputs separate 5T and 5R after control by Q100 and Q102.
RF PA: RF Power Amplifier Circuit Q500 (RD07MUS2B), Q501 (RD01MUS2)
Audio PA: Audio Power Amplifier Circuit U3 (TDA8547TS)
3M: EEPROM IC200 (AT24C512C), encrypted IC U2 (LTJMIC)
3C: Transistor X500 (12.8M TCXO)
5T: RF Pre-drive Amplifier Circuit Q502 (2SC5108), Q503 (2SC3356)
5R: Low Noise High Frequency Amplifier Circuit Q507 (3SK318)
DC-DC: PMU IC1 (HS8851), U500 (AT1846S)
4.5.IC Characteristics
4.5.1. Characteristics of AT1846S
a. Integrated CMOS RF front-end
b. High linearity low-noise amplifier and mixer
c. Low IF receiver path
Automatic DC offset calibration circuit
High performance analogue/digital converter and digital/analogue converter
Fully-integrated receiver filter
Digital AGC
Modulation and demodulation technique based on digital signal processing technology
d. TX path of direct frequency synthesis
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