Kirisun DM588 User manual

DM588
V191225 ShenZhen Kirisun Communications Co.,Ltd.
Professional wireless communication system solution supplier
SERVICE MANUAL

DM588 Service Manual
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. LED Indicator...............................................................................................................................2
3.Basic Operation............................................................................................................................................. 3
3.1. Powering On/Off ..........................................................................................................................3
3.2. Selecting a Channel.....................................................................................................................3
3.3. Adjusting Volume.........................................................................................................................3
3.4. Initiating a Call .............................................................................................................................3
3.5. Receiving a Call...........................................................................................................................3
3.6. Calling Back.................................................................................................................................3
4.Circuit Description........................................................................................................................................ 4
4.1. Schematic Circuit Diagram of Main Board .................................................................................. 4
4.2. Tx Circuit......................................................................................................................................4
4.3. Rx Circuit .....................................................................................................................................5
4.4. Frequency Synthesis Circuit........................................................................................................6
4.5. Power Supply Circuit ...................................................................................................................6
4.6. Others .......................................................................................................................................... 7
4.7. Port Description of Master Chip LT1901 .....................................................................................7
4.8. Control Panel...............................................................................................................................9
5.Feature Description and Parameter Settings.......................................................................................10
5.1. Stun, Revive and Remote Monitor.............................................................................................10
5.2. Scan...........................................................................................................................................10
5.3. Zones..........................................................................................................................................11
5.4. Preference Settings....................................................................................................................11
5.5. TOT (Time-Out-Timer) ...............................................................................................................12
5.6. EmergencyAlarm ......................................................................................................................12
5.7. Parameter Settings....................................................................................................................13
5.8. Upgrading Software...................................................................................................................13
6.Assembly and Disassembly......................................................................................................................14
6.1. Separating RF Unit and Control Panel......................................................................................14
6.2. Disassembling Main Unit...........................................................................................................15
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DM588 Service Manual
6.3. Disassembling Front Part ..........................................................................................................16
6.4. Explosion Diagram.....................................................................................................................17
7.Debugging.....................................................................................................................................................18
7.1. Debugging Devices....................................................................................................................18
7.2. Debugging..................................................................................................................................19
8.General Specifications...............................................................................................................................37
9.Devices for Maintenance and Test..........................................................................................................38
10.Troubleshooting .........................................................................................................................................38
Appendix 1 Abbreviations.............................................................................................................................40
Appendix 2 Material List (Electronic Part) ................................................................................................41
Table 1 Material List of Main Board DM588-01 (136MHz-174MHz).................................................... 41
Table 2 Material List of Main Board DM588-02 (400MHz-470MHz).................................................... 58
Table 3 Material List of Main Board DM588-08 (400MHz-480MHz).................................................... 73
Table 4 Material List of DM588 LCD Board..........................................................................................90
Table 5 Material List of DM588 Key Board...........................................................................................92
Appendix 3 Material List (Structural Part).................................................................................................93
Appendix 4 Schematic Diagrams and Layout Drawings.......................................................................97
Figure 1 Schematic Diagrams of Main Board DM588-01 (136MHz-174MHz).....................................97
Figure 2 Schematic Diagrams of Main Board DM588-02 (400MHz-470MHz)....................................111
Figure 3 Schematic Diagrams of Main Board DM588-08 (400MHz-480MHz)...................................125
Figure 4 Top-Layer Layout Drawing of Main Board(B Board)............................................................139
Figure 5 Bottom-Layer Layout Drawing of Main Board(B Board)......................................................140
Figure 6 Top-Layer Layout Drawing of Main Board(D Board)............................................................141
Figure 7 Bottom-Layer Layout Drawing of Main Board(D Board)......................................................142
Figure 8 Schematic Diagram of LCD Board.......................................................................................143
Figure 9 Top-Layer Layout Drawing of LCD Board............................................................................144
Figure 10 Bottom-Layer Layout Drawing of LCD Board ....................................................................145
Figure 11 Schematic Diagram of Key Board......................................................................................146
Figure 12 Top-Layer Layout Drawing of Key Board...........................................................................147
Figure 13 Bottom-Layer Layout Drawing of Key Board .....................................................................148
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DM588 Service Manual
1.Overview
1.1.Range of Application
This manual is intended for the maintenance of the DM588 digital mobile radio and for use by the
engineers and professional technicians, who have received training from Kirisun. The information in
this manual might change with technology improvement. To obtain the latest information, please
contact Kirisun or your local dealer.
Please read this manual carefully 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 Gas
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.
Broken 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.
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 main unit and accessories, except for any of the following
situations.
Absence 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).
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DM588 Service Manual
2.External View and Keys
2.1.External View
SN Part Name SN Part Name
1 LED Indicator 2 Speaker
3 Menu/OK Key 4 Up/Down/Left/Right Key
5 Programmable Keys (P1~P3) 6 Hand Micro (and Programming Cable)
Interface
7 EmergencyAlarm Key 8 LCD Screen
9 On/Off Key 10 Back Key
11 Volume/Channel Knob 12 RFANT Interface
13 External Speaker Interface 14 3G/4G ANT Interface (Optional)
15 GPS ANT Interface (Optional) 16 Bluetooth ANT Interface (Optional)
17 Power Interface 18 PTT Key
19
Microphone
2.2.LED Indicator
Indicator State
Radio State
Red light on Transmitting signals
Green light on Receiving signals
Green Light Flashing
Scanning channels
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DM588 Service Manual
Orange Light Flashing
In call hold state under digital mode, and exit when hold time out
Red Light Flashing Fast CPS reading radio parameters
Green Light Flashing Fast CPS programming radio parameters
3.Basic Operation
3.1.Powering On/Off
To power on the radio, hold down the On/Off key until the LCD screen is on.
To power off the radio, hold down the On/Off key until the LCD screen is off.
3.2.Selecting a Channel
In standby state, press the Volume/Channel knob to display an interface, and then rotate the knob or
press the Up/Down key 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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DM588 Service Manual
4.Circuit Description
4.1.Schematic Circuit Diagram of Main Board
4.2.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
Transmitting signals TX VCO are buffered and amplified by the Q7, Q8, Q9 and then the pre-drive
amplifier Q18 to generate strong enough driving power signals, and then amplified by the last-stage
amplifier Q29. Then, impedance matching is finished at the output end of the last-stage amplifier
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DM588 Service Manual
using a microstrip to reduce loss of output power caused by impedance mismatching. Then,
transmitting signals go through the TX/RX switch (composed of the D14, D15, D16 and D17) and
enter the low-pass filter (LPF).
Low-Pass Filter (LPF) Circuit
The low-pass filter for inhibiting harmonic wave is a high-order Chebyshev filter composed of a
lumped parameter inductance and a capacitance. Under certain in-band fluctuation performance, the
filter enhances inhibition of out-of-band harmonic wave and spurious signals. Transmitting signals
after wave filtering is radiated through the antenna.
Automatic Power Control Circuit (APC) (Included)
For transmitting signals, a power-oriented coupler composed of a microstrip, an inductance and a
capacitance detects forward and reverse power, and detects and samples waves through detector
diodes (the D30 and D201). The output voltage is compared first with the voltage (the IC13-A) and
then with the preset standard voltage (the IC13-B) to get a voltage, which is used to adjusts the grid
voltage of the pre-drive amplifier Q18 and the last-stage amplifier Q29 to detect standing wave and
control power. Meanwhile, the RF power amplification circuit is protected through controlling theAPC
voltage.
4.3.Rx Circuit
The Rx circuit is composed of an RF circuit, an MF circuit and MF signal processing, which are
described as below.
RF Circuit
Signals from the antenna are filtered through a low-pass filter circuit, transmitted through the RX/TX
switch (the D14, D15, D16 and D17) to a tunable band-pass filter for filtering, amplified by the
low-noise amplifier Q12, filtered again by a tunable band-pass filter, and then mixed with the first
local oscillator signals in a mixer to get the first MF signals at a frequency of 49.95MHz.
MF Circuit and MF Signal Processing
The first MF signals are filtered by the crystal filter Z2, amplified by the amplifiers Q13 and Q14, and
then mixed again and processed by the MF decoding chip Q17 to get noise signals, signal strength
and audio signals, which are processed by the DSP in the master chip LT1901.
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DM588 Service Manual
4.4.Frequency Synthesis Circuit
The frequency synthesis circuit is composed of the phase-locked loop (PLL) chip LMX2571, a loop
filter (LPF), a voltage-controlled oscillator (VCO) and a feedback network. To the LMX2571, a work
clock is provided by the active resonator U9 and configuration data is provided by the master chip
LT1901. The LPF consists of a 4-stage resistor-capacitor (RC) filter circuit. The TX VCO and the RX
VCO respectively includes a varicap, an inductor, a capacitor and a transistor. The feedback network
consists of an inductor and a capacitor. After frequency synthesis, the TXLO signals and RXLO
signals are generated and sent respectively to the transmitting circuit and the receiving mixing circuit.
The modulated signals MODE1 and MODE2 are modulated respectively by the active resonator U9
and the TX VCO.
4.5.Power Supply Circuit
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DM588 Service Manual
The radio is powered by a car battery, and the baseband circuit and the RF circuit are powered
independently. A protection unit at the front end of the power supply detects overvoltage and
overcurrent to ensure safety.
To the baseband circuit, the MP2359 DC-DC convertor outputs a voltage of 4.2V to power the master
chip LT1901 and the PMU in the Bluetooth chip, and the PMU of the LT1901 outputs 3M, AVDD_2V8,
USB3.3V, D1V8 and D1V2A to power other parts.
The radio is powered on or off through control over the inhibit pin of a DC/DC convertor.
For startup, the On/Off key is held down, the POWER_KEY is at a low logic level, the DC/DC circuit is
put through via a logic conversion circuit, the system is powered on and initialized, and the
POWER_HOLD is set to a high level to keep the DC/DC convertor enabled until startup is finished.
For poweroff, the system detects that the On/Off key is held down, executes the poweroff process,
and finally sets the POWER_HOLD to a high level to cut off the DC/DC circuit.
4.6.Others
Bluetooth and GPS are provided as required in orders.
4.7.Port Description of Master Chip LT1901
Pin NO.
Port NO.
Network Name
Description
A11 GPIO_D46 5SC Power switch of phase-locked loop (on at
high level)
B13
GPIO_D47
5RC
Receiving power switch (on at high level)
E13 GPIO_D48 5TC Transmitting power switch (on at high level)
E12 GPIO_D50 TXENABLE Enable transmitting power amplification
(valid at high level)
F15
GPIO_D8
POWERKEY_DET
Power key detection
F14
GPIO_D9
POWER_HOLD
Hold power for soft startup
AB16
GPIO_D104
GPSENABLE
Enable GPS receiving (valid at high level)
H18
RXD1
RXD1
Output GPS/4G module data
J18 TXD1 TXD1 Input GPS/4G module data
T18 GPIO_D109 GPS/4G_SELECT Select GPS/4G module
J14 RXD0 RXD0 Output BT chip data
J15 TXD0 TXD0 Input BT chip data
F9 GPIO_D54 TXRX Select TX/RX VCO
B10 GPIO_D56 SPI_DATA SPI data (phase-locked loop, IF chip, DAC)
B11 GPIO_D57 SPI_CLK SPI clock (phase-
locked loop, IF chip,
DAC)
C11 GPIO_D55 72310_LD Phase-locked loop lock detection
A10 GPIO_D58 SPI_72310_CS Chip select of phase-locked loop
C14
GPIO_D51
2365_PDN
Power saving mode of IF chip
E14
GPIO_D49
2365_RSTN
Reset IF chip
C12
GPIO_D53
SPI_2365_CS
Chip select of IF chip
C13
GPIO_D52
SPI_DAC_CS
Chip select of DAC
T19 GPIO_D14 PTT PTT key input
F10 GPIO_D0 HOCK Hand microphone hook
E10 GPIO_D3 CM 1-wire bus / external hand microphone key
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