Kirisun DP-770 Service Manual

DP770 Service Manual

Contents

1. General Introduction ................................................................................................................................... 3

1. Scope ....................................................................................................................................................................... 3

1.2. Safety Precaution ................................................................................................................................................... 3

2. External Vie w and Functional Keys .......................................................................................................... 4

1. External View and Functional Keys ..................................................................................................................... 4

2.2. LED Indicator .......................................................................................................................................................... 5

3. Circuit Description ...................................................................................................................................... 6

1. RF Section ............................................................................................................................................................... 6

3.1.1. Transmitter Circuit.................................................................................................................................. 6

3.1.2. Receiver C ircuit ..................................................................................................................................... 8

3.1.3. Frequency Generation Unit ................................................................................................................... 9

3.1.4. GPS Circuit .......................................................................................................................................... 10

3.2. Baseband Section ................................................................................................................................................ 11

3.2.1. Power Section ...................................................................................................................................... 11

3.2.2. Audio Section ....................................................................................................................................... 11

4. Function Instruction and Parameters Setting ....................................................................................... 13

1. General Functions ................................................................................................................................................ 13

4.2. Parameters Setting .............................................................................................................................................. 14

5. Assembly and Disassembly .................................................................................................................... 17

5.1. Attaching and Detaching the Battery ................................................................................................................. 17

5.2. Attaching and Detaching the Antenna ............................................................................................................... 18

5.3. Attaching and Detaching the Belt Clip ............................................................................................................... 19

5.4. Detaching the Chassis ......................................................................................................................................... 19

5.5. Removing the PCB board from the Chassis .................................................................................................... 20

5.6. Detaching the Keypad B oard from the Case.................................................................................................... 20

5.7. Exploded View ...................................................................................................................................................... 22

6. T une Mode ................................................................................................................................................. 25

1. Required parts in adjust ment .............................................................................................................................. 25

6.2. Adjusting and checking method ......................................................................................................................... 25

Page 1 of 102

DP770 Service Manual

6.2.1. Frequency description ......................................................................................................................... 25

6.2.2. Adjustment Equipments ....................................................................................................................... 26

6.2.3. Adjustment instruction o f TX ................................................................................................................ 26

6.2.4. Receiver section adjustm ent inst r uction .............................................................................................. 28

6.2.5. GPS Performance Test Instruction ...................................................................................................... 30

7. Main Specifications .................................................................................................................................. 31

8. R

epairing an d Testing Equi pments ......................................................................................................... 33

asic Tr oubles h ootin g ............................................................................................................................. 34

9. B

Appendix 1 Material List（Electrics Parts）400-470MHz ......................................................................... 36

Appendix 2 Material List （El ectrics Parts ）136-174MHz ......................................................................... 54

Appendix 3 Material List ( Str uctural Section) ........................................................................................... 66

Appendix Figure 1 DP770 UHF Main Board Top Side PCB View ............................................................. 69

Appendix Figure 2 DP770 UHF Main Board Bottom Side PCB View ...................................................... 70

Appendix Figure 3 DP770 UHF Keypad Top Side PCB View ................................................................... 71

Appendix Figure 4 DP770 UHF Keypad Bottom Side PCB View ............................................................. 72

Appendix Figure 5 DP770 UHF Main Board Sche matic Diagram ............................................................ 73

Appendix Figure 6 DP770 UHF Keypad Schematic Diagram................................................................... 85

Appendix Figure 7 DP770 VHF Main Board Top Side PCB View ............................................................. 86

Appendix Figure 8 DP770 VHF Main Board Bott om Side PCB View ...................................................... 87

Appendix Figure 9 DP770 VHF Keypad Top Side PCB Vie w ................................................................... 88

Appendix Figure 10 DP770 VHF Keypad Bottom Side PCB View ........................................................... 89

Appendix Figure 11 DP770 VHF Main Board Schemat i c Diagram .......................................................... 90

Appendix Figure 12 DP770 VHF Keypad Schematic Diagram ............................................................... 102

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DP770 Service Manual

1. General Introduction

1.1. Scope

This manual is used for maintenance and r epairin g of the DP770 di gita l handhel d radio, and inte nde d to be used by experienced technicians and trained engineers. Changes may occur with the technology development. To require latest technology development information, please contact our company or the local dealer.

Before any repairing, please read this manual carefully.

1.2. Safety Precaution

Electromagnetic Radiation Energy of Radio

Radios will generate and radiate electromagnetic energy, and Kirisun Radios’ electromagnetic radiation meets the demand of domestic and international standards. To ensure optimum efficiency of the radio and reduce electromagnetic radiation, when using the radio, it should be perpendicular to the ground. Keep your mouth 2-5cm away from the m icrophone.

Electromagnetic Interference

To avoid interference, please t urn of f the radio in the site which specifically forbids using radio, e.g. hospital, airport, health center and etc.

Explosive harmful gases

In the place with explosive harmful gases, such as the lower deck of a hull, fuel or chemical storage, transportation facilities, places that contain chemical s or dust particles or metal powder in the atmosphere, radio should be shut down.

When getting close to the blast zone and detonator electric, radio sho uld b e t urn off. Charging or replacing batt er y is not allowed in the place with potential explosive gases.

Antenna Damage

Do not use the radio when the ant enna is broken, which will cause a mild burn to your skin.

Replacing Spare Parts

Please try not to replace the spar e parts which are not contained in the spare part list.

Page 3 of 102

2. External View and Functional Keys

accessories.

M N

H J

E F

2.1. External View and Functional Ke ys

DP770 Service Manual

No. Part Name No Part Name

Volume/Channel Knob Rotate the knob to adjust the

A Antenna B

LCD Display

160*128, 65K colors, 1.8 TFT LCD.

volume.Short press the key, the feature of the knob switches from adjusting the volume to changing the channel. Universal Connector for Accessories Connect USB program ming cable, earphone or some other

G I Side Key 2 (SK2) J Left Key

Top Key (TK) Programmable, default: short press to enable emergenc y alarm, long press to exit emergency alarm. Side Key 1 (SK1) Programmable, default: none.

F LED Indicator

H PTT Key

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Programmable, default: none. Press the key to select the ite ms

Dial Key

O Numeric keypad P MIC Q Speaker

Press the key to send data or t ext messages. Right Key Press the key to select the ite ms shown at the bottom right of the screen.

L 4-way Navigation Key

2.2. LED Indicator

DP770 Service Manual

shown at the bottom left of the screen.

ON/OFF/Hookoff Key Return to the standby screen. Long press the key to turn on/off the radio.

• Red LED glows: Radio is transmitting.

• Green LED glows: Radio is receiving (voice, short m essage, or data) or there is an activity on t

hannel.

• Orange LED glows: This means the call hang time period. That is, you can press PTT to talk while t or

ange LED glows

• Orange LED flashes: Radio is in e m er gency status; or there is a missed call / incoming call aler t ; or t radio is scanning.

• Red LED flashes: Radio is r ec eiv ing emergency alarm or "power on check" failed.

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3. Circuit Description

Pre-Driver2 Drive-stage

Final-stage Tx/Rx Switch Low-pass Filter

Microstrip

Matcher

APC

To RX

Gate voltage control

Subtracter

Sampling

resistor

BATT+

I/V

convertor

Attenuator

To GPS

TEMP Sensor

Close To Final PA

Temp Det Level

Antenna

FGU

Pre-Driver1

3.1. RF Section

Figure 3-1 RF Schematic Diagram

DP770 Service Manual

3.1.1. Transmitter Circuit

Figure 3-2 Transmitter Circ uit Diagram

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DP770 Service Manual

The transmitter circuit includes three parts:

• Tran smitter Power Amplifier

he carrier signal generat ed by the TX VCO is mod ulate d and a mpl ified, and f eeds to t he tr ansm itter circuit

via the following steps. Step1: The signal passes a Π-type attenuator, realizing segregative isolation between RF power amplifier

circuit and TX VCO. Step2: The signal are pre-amplified by a pre-driver amplifier (UHF: Q301, VHF: Q72), providing further

segregative isolation bet ween itself and the next level amplifier. Step3: The signal goes to the next pre-am plifier and drive amplifier (RD01) to obtain further amplification,

guarantying to provide enough driver power signal to the final-stage amplifier (RD07) and obtain the final power amplification..

Step4: After amplified by multiple amplifiers, the transmitter signal is processed by a microstrip line to complete output impeda nce match ing at the output of f inal-sta ge amplifier, to reduce the output loss caus ed by impedance mismatch.

Step 5: The transm itt er signal goes through the RX/TX switch and enters to the low-pass filter.

• Low-pass Filter Circuit of suppressing t he harmonics

The low-pass filter is high-grade low-pass filter composed of lumped-parameter inductors and capacitors. By this filter, the spurious signal within the stop band can be attenuated as much as possible while the in-band ripple is within the required range.

• Auto Power C ont rol Circuit (APC includes temperature detection circuit

n the auto power control and temperature detection circuit, the drain current from the driver amplifier and

)

final-stage amplifier is converted to voltage via the sampling resistor and subtraction circuit which is composed of the first operat ional amplifier.

This voltage is compare d w ith the APC control voltage of output by DA C at the seco nd o perati ona l ampl ifier. Then the error voltage controls TX power by controlling the bias voltage at the gate of amplifier (including the driver amplifier and the final-stage amplifier. The temperature sensor IC detects the surface temperature of the final-stage amplifier, and converts it to DC voltage. Then the DC voltage is compared with the voltage correspo nding to t he protectio n temper ature (generally 80% of the extreme temperature ) of the amplifier. If the temperature is too high, the b ias v oltage o f the a mpl ifier w ill be redu ced unt il the sur fa c e temperature falls below the prot ec t io n temperature.

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3.1.2. Receiver Circuit

AD986

Antenna

OMAP13

-120dBm

-106dBm

-121dBm

Clip at -24dBm

Figure 3-3 Receiver Circuit Diagram

DP770 Service Manual

Point A

Low-pass filter Insertion los s = -1dB

-121dBm

-124dBm

Band-pass filter Insertion los s = -3dB

Low noise amplifier Gain = 18dB

Band- pass filte r Insertion los s = -3dB

-109dBm

Lo: 0dBm

-115dBm

Mixer Insertion los s = -6dB

he receiver circuit mainly com prises RF band-pass filter, low-noise amplifier, mixer, IF filter, IF amplifier

Crystal filter

sertion lo ss = -6dB

IF ampli fier Gain = 25dB Po-1dB = -24dBm

-96dBm Point B

and IF processor.

• Receiver Front-end

The HF signal from the lo w-pass filter passes through the electrica lly t unab le band-pass filter controlled via APC/TV1 level, to remove out-of–band interference signal and to send wanted band-pass signal to the low-noise amplifier (UHF:Q205,VHF:Q62). The amplified signal goes to a band-pass fi lter controlled via TFV level to remove out-of-band inter ference si gnal generat ed during a mplificat ion, and to send wante d HF signal to the mixer (UHF:Z201,VHF:Z10).

Meanwhile, the first local oscillator signal generated by VCO passes through the low-pass filter and also goes to the mixer (UHF: Z201, VHF: Z10). In the mixer, the wanted signal and the first local oscillator are mixed to generate the first IF signal (UHF: 73.35MHz, VHF: 51.65MHz). The signal passes a frequency selective network composed of LC, to suppress carrier other than the first IF signal , and to increase the isolation between the mixer and the IF filter. After that, the first IF signal i s processed by the crystal filter (UHF: Z202, VHF: Z11) and is sent to the two-stage IF amplifier circuit composed of 2SC5006 for amplification. Then the amplified signal goes to the IF processor AD9864 (UHF: U201, VHF: U91) for processing.

• eceiver Back-end

Figure 3-4 IF Processor Diagram

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DP770 Service Manual

he first IF signal (73.35MHz) output by the IF amplifier goes into AD9864 (UHF: U201, VHF: U91) via Pin

T 47 and completes the second mixer, where the signal is converted to the second IF signal (2.25 MHz). The second IF signal is converted to digital signal via ADC sampling, and output via the SSI interface. Finally, the digital signal is sent to DSP (OMAP138) for demodulation.

AD9864 employs reference frequency of 12.8MHz. The second local oscillator is composed of an external oscillator, a varactor and some other components, to provide the (UHF: 71.1MHZ, VHF: 49.4MHz)

71.1MHz LO signal. The 18MHz clock input frequency of AD9864 is generated by the LC resonance loo p.

3.1.3. Frequency Generation Unit

Figure 3-5 Frequency Generation Circuit Diagram

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DP770 Service Manual

The frequency generation circuit is composed of VCO and PLL. It is the core module of the whol e TX-RX system. This circuit provides accurate carrier frequency during transmission; and provides stable local oscillator signal during rec ept ion. It has a direct influence on the performance of the system.

• Workin g Pr inciple of PLL

The 12.8MHz frequency generated by the reference crystal oscillator goes to PLL for division, generating the reference frequency (i.e step frequency f1). The frequency generated by VCO is filtered harmonic via LPF and generates another frequency ( f2) through the freq uency div ider in PLL. Then freque ncies f1 an d f2 are compared in the phase detector (PD), to generate continuous pulse current. The pulse current goes to the loop filter for RC integration and is then converted to CV voltage. Then the CV voltage is sent to the varactor of VCO. It adjusts the output f requency of VCO directly unti l the CV voltage becomes constant. Then the PLL is locked, and the stable frequency output by VCO goes to the TX-RX channel af ter passing through two buffer a m pl ifiers.

• Workin g pr inciple of VCO

Voltage controlled oscillator applies oscillation mode of three-point capacitance, and gains different output frequency through changing controlled voltage (C V) o f varactor. Rx VCO is composed of oscillating circuit and Q24/Q29 and provides local oscillati on signal. Tx VCO is composed of oscillating circuit and Q27/Q28 and provides carrier of Tx signal.

Working principle employs colpitts oscillator circuit (the RX oscillator circuit is composed of D102, D103, D106, D107 and L112 (VHF:D32, D33, D36, D34 and L23); the TX osci lla tor ci rcui t is com posed of D108, D109, D110, D101and L117 (VHF:D38, D39, D40, D41 and L31). It obtains different output frequencies by changing control voltage of varactor (i.e.CV voltage).RX VCO is composed of oscillator loop and Q104 (VHF:Q43), providing local oscillator signal. TX VCO is composed of oscillator loop and Q108 (VHF Q4 4) and provides carrier of TX signa l.

• Two-point Modulation

To obtain higher modulatio n acc uracy and lower 4 F SK b it err or, it employs two-point modu lat ion tec hno logy in the TX mode. MOD1 and MOD2 send the modulation signal to the modulation end of VCO and the reference crystal oscillat or of PLL respectively to modulate TX VCO and the reference crystal oscillator.

3.1.4. GPS Circuit

Figure 3-6 GPS Circuit Diagram

The GPS function is realized via REB-1315LPx (GPS module).The GPS module integrates a baseband processor, a LAN and a SAW . The GPS function is realized via the foll ow ing steps:

Page 10 of 102

DP770 Service Manual

PMU

VCC_3V3

VCC_1V8

VCC_1V2

LDO_3V3

Power switch

DC/DC

Battery

Audio PA

Soft_ctr

PWR_Key

RF_PWR

Logic OR

LDO

GPS_3v3

RTC_1v2

Step1: The 1575.42MHz GPS signal is received by the antenna, and then goes to HPF to remove the in-band signals used for t r ansmission and reception.

Step2: The signal goes to GPS module for amplification and filtering after frequency selection via filter. Then it will be sent to baseband section for cal culation.

Step3: The calculated GPS position information is sent to OMAP for processing via the UART interface. Meanwhile, OMAP138 can send appropriate command information to the GPS module via the UART interface.

Step4: Finally, the OMAP sends the proce ssed data information to the LCD.

3.2. Baseband Section

3.2.1. Power Section

Figure 3-7 Power Section Diagram

The radio adopts 7.4V li-i

on battery as power supply. The baseband and RF circuit are supplied by independent power structure. The baseband power is composed of two stage conversion circuit. The first stage reduces the batter y voltage to 5V by DC/DC, and the second stage converts the 5V voltage to power required voltage for the system by the power management.

Power On/Off: Power On/Off is implemented through a PMOS component. When the Power On/Off key i s pressed, PWR_Key signal becomes high level, and PMOS component becomes conducted. The system will begin initialization and set Soft_ctr to be high level. Thus, the radio is powered up. During the power off process, when the system detects that the Power On/Off key is pressed, the system will begin executing the shut down operations, and finally set Soft_ctr to be low level, which will shut down the PMOS component, thus the radio being powered off.

3.2.2. Audio Section

The audio module is mainly for audio input and outp ut. It uses TLV320AIC14 as audio codec to conv ert and

Page 11 of 102

DP770 Service Manual

CODEC

Audio PA

OmapL138

AD9864

TLV5614

Baseband signal

Configure data

RX signal

IICIIS

INT_MIC

EXT_MIC

Voice signal

INT_SPK

Interface EXT-SPK

TONE

Mode select

SPI

MIC

Input

PWM

Control

signal

process audio signal and digital signa l. The audio ampl ifier TDA854 7TS is used to amplify the analog audio signal.

DSP processes digi tal signal (i.e audio signal encoding/decoding, digital I/Q signal decoding, digi tal audio signal processing). The AD9864 converts and processes the RF IF, and sends un-demodulated serial digital signal to the DSP fo r proces sing. The n DAC 5614 conv ert s the dig ital signa l output by DAS to analog signal.

Figure 3-8 Audio Section Diagram

iagram of Signa l Flow

• D

The microphone convert s t he aud io sign al into e lectr ica l signa l, whic h is am plifi ed by PG A of the codec and then sent to ADC of the codec for sampling. After digital audi o processing, the signal is output DSP for processing. Then the s ign al is s ent t o DA C (TLV5614), which conver ts t he sig nal to modulat ion si gnal. After modulated and amplified in the RF module, the signal is sent out from the antenna.

The RF signal receiv ed by the R F mo dule is conv ert ed to d igit al by ADC (AD9864), and is then sent t o D SP for modulation and proces sing. Then the digital signal is sent to the digital audio process or of the codec for digital audio processing, and is then converted into analog audio signal by DAC of the codec. Finally the signal is amplified by the exter nal audio amplifier (TDA8547TS) to drive the speaker.

• System Peripheral Function Unit

The system peripheral consists of analog/digital converter module, vocoder encryption modul e, TF card interface module, display module, key detection module and acceleration sensor module. These modules are used to achieve human-radio interaction, state detection, communication encryption and feature extension. The analog/digital converter is used for voice signal strength detection, power suppl y detection, temperature detection, so as to realiz e VOX, low bat tery w arning and tem perature c ontrol. The ac celerati on sensor is used to detect tilted state, realizing mandown function. The TF card module interface is used for communication encrypt ion, to provide communicate security.

Page 12 of 102

DP770 Service Manual

ADC

Voice level detect

Codec

Accelerometer

TF card

IIC0

INT_MIC

EXT_MIC

CVDECT

Voltage

Temperature

detect

IIC1

GPS

UART0

OmapL138

Key scan module

LCD

controler

Figure 3-9 The Composing of System Basic Peripheral

4. Function Instruction and Parameters Setting

4.1. General Functions

• Support P-Call, G-Call, A-Call in digit a l mod e.

• Support P-Call, G-Call, A-Call in analog mode.

• Support Transmit Interrupt function in digital mode.

• Support Encryption of both voice and data.

• Support Short message, st at us me ssage and GPS data information.

• Support Stun, Un-kill, Re mote Monitor, Call Alert digital signaling.

• Support Self-defined Ki ll digital signaling.

• Support CTCSS/CDCS S i n analog mode.

• Support MDC1200, 2 Tone, DTMF, 5Tone signaling system in analog mode.

• Support Emergency funct i on.

• Support scan function of digital channel, analog channel and mixed digital and anal og channel.

• Support the maximum of 1024 c hannels capacity.

• Support the maximum of 248 Z ones and the maximum of 128 channels in every zone.

• Support the maximum of 512 co ntacts.

• Support graphic menu operation interface.

• Support LED, choices of alert t ones and vibration indication.

• 12.5 kHz, 20 kHz or 25 kHz channel spaces can be chosen by PC software.

• Real-time display of signal strength.

• Support battery display and low bat t er y alarm alert functions.

Page 13 of 102

DP770 Service Manual

4.2. Parameters Setting

Radios have default parameters. While users can set parameters of frequency, channels, function of scanning or encryption, etc according your own requirements.

• Parameters setting st eps as follow:

Step 1. Install the right version of Kirisun CPSp. Step 2. Connect radio with compu t er by Kirisun programming cable. Step 3. Make sure radio’s power is on. Step 4. Execute CPSp and start oper at ion.

• CPSp installation st eps as follow:

Step 1. Double click the installation file; pop-up interface as Figure 4-1.

Figure 4-1

tep 2. Click “Next” and enter into t he nex t inter f ac e t o choose the installation route.

Step 3. In the interface shown in Figure 4-2, users can click “Browse” t o choose t h e ins tallat ion r oute, or

use the default route, and click ”Next” t o ent er t he next interface to choose language. Figure 4-2

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Step 4. Click “Next” to enter into installation information confirmation interface.

DP770 Service Manual

Figure 4-3

tep 5. Click “Next” to enter into the finished interface.

Figure 4-4

Page 15 of 102

tep 6. Click “Finish” to finish installa tion.

DP770 Service Manual

Figure 4-5

tep 7. After successful install at io n, double click the software, as shown in Figure 4-6

Figure 4-6

Page 16 of 102

DP770 Service Manual

sers can read the radio’s date, or revise the data and then write into the radi o.

U Please refer to the help file in t he C PSp for the detailed operation instruction about K ir is un CPSp.

Notes:

Errors of parameter configuration may make certain functions cannot be used properly, in general, which can be solved by writing the correct par ameters configuration.

Before parameter configuration modification, we strongly recommend backup the current parameters, make sure that the radio can rest or e after an error occurs.

5. Assembly and Disassembly

5.1. Attaching and Detaching the Battery

Attaching the battery as shown in figure 5-1. Put the battery into radio’s aluminum alloy bracket slot. Push up until a click is heard.

igure 5-1

Page 17 of 102

Detaching the battery as shown in Figure 5-2 Push up the battery buckl e at the end of the battery. Pull down to detach the bat t er y.

Figure 5-2

5.2. Attaching and Detaching the Antenna

As shown in Figure 5-3, put t he antenna into radio’ s t hread hole, and rotate clockwise to fasten it.

DP770 Service Manual

As shown in Figure 5-4, rotate counter-cloc kwise to detach.

igure 5-3

igure 5-4

Page 18 of 102

5.3. Attaching and Detaching the Belt Clip

As shown in Figure 5-5, align the screw holes on the belt clip, which is located on the back of the r adio, and fasten them with the screwdriver.

DP770 Service Manual

gure 5-5

As shown in Figure 5-6, unfa s t en t he scr ews to detach the belt clip.

5.4. Detaching the Chassis

Step 1. Detaching the belt clip (Figure5.6);

Figure 5-6

Step 2. Removing the antenna (Figure 5.4); Step 3. Removing the battery (Figure 5.2); Step 4. Removing the two screws on the bottom of the chassis. Remove the

two screws on the side of shell, and remove the nut from antenna connector.

Figure 5-7

Page 19 of 102

DP770 Service Manual

Step 5. Refer to Figure 5-8. Insert the flat-bladed screwdriver

into the slot of Al alloy bracket; lift it s o as t o separ ate the Zinc alloy bracket from the chassis, and then push the Al alloy bracket away from the chassis, and take the soft flat cable away from the socket. Separate the speaker connecting cable by the soldering iron to.

gure 5-8

5.5. Removing the PCB board from the Chassis

Step 1. Remove the ten screws on the PCB board. Step 2. Cut off the antenna connecting point by the soldering iron and then separate the PCB board

from the chassis.

Figure 5-9

5.6. Detaching the Keypad Board from the Case

Step 1. Insert the flat-bladed screwdriver into the slot between the volume knob and case, lift the

volume knob and take off it. Remove the volume knob nut by special tool in the clockwise direction. Separate the volume soft f lat c able from the socket.

Figure 5-10

Step 2. Separate the speaker and M IC cable by soldering iron.

Page 20 of 102

DP770 Service Manual

Step 3. Remove the four screws from keypad board and take off keypad PCB from case. (See Figure

5-11)

Figure 5-11

ep 4. After the detaching above, you can make the appropriate repairs and debug against fault

conditions.

Page 21 of 102

5.7. Exploded View

NO.

Part Number

Name, Specification

Quantity

7WFP-4002-01A

DP770lens protective fi l m PE T; transparent

1 2 7MHP-4002-02A-WC

DP770 LCD lens PC+PMM A, transparent

1 3 7GCJ-S4002-J

DP770 lens double sides adhesiv e t apeNITTO 57120B

1 4 7MHP-4002-04A-W9

DP770 PTT cover PC+ABS/TPU；black/PT2757C

1 5 7MHR-4002-10A-W6

DP770 Side silicone buttons silica gel; blue,PT654C

2.0X7.0 iron hardened tooth machine screw; Zinc plating-black

7MHP-4002-01A-W0

DP770 front cover shell P C+ABS, texture, black

1 8 6SS1-4002-HL3C

Attachment plate strips ne s t ing

1 9 7MHM-4002-01A-W9

DP770 LCD Sponge bac k r ubber ; bla ck

57585960616263

48 49

50 51

29 30

25 24

22 23

30 6

DP770 Service Manual

Spare Parts List（Structure）

10 7GCB-S4002-01A DP770 T rumpet anti-dust mes h nylon; black 1

7SAF-020070M-SZYB-Z

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DP770 Service Manual

7MHR-4002-16A-W9

DP770 Knob waterproof p ad silica gel; black

4SM7-4002-A40

Waterproof microphone with cover Φ7.0mm, height 2.8mm,

4SM7-4002-A40

Encoder switch RE11(Linjiwei)

PT432C/ character

DP770 display shielding cover 44.3*34.1*2.0MM, 21

7SMF-020040M-SZYB-N

M2*4 iron hardened tooth ma chine cross screw, Nylok

sided adhesive

M2.6*6 cross, machine ferrous hardened, Black zinc machine teeth

6SS3-BJ4026-A

KBJ-15 Belt Clip PC+ABS

7MHR-4002-11A-W9

DP770 main waterproof ci r cle o f si li ca gel; black

2.0X11.0 tooth machine cross screws 5.3 harden iron; zi nc plating-black

mesh

7MHP-4002-05A-W9

DP770 main unit top cover PC+ABS; texture; black

7MHL-4002-01-W

DP770 aluminum chasis ADC12; burnished

7MHR-7042-06B-W0

thermally conductive pad, blac k,3*6*9mm

DP770 Motor pressure pieces of stainless steel; natural 45

7MHC-4002-04A-W

DP770shielding cover ho lder 22.8*15.6mm; cupronickel

6PM7-4002-HMH

DP770-02 main board PC B ten -layer boar d

12 4SS7-3525-016-100A

15 7MHR-4002-09A-W9

DP770 speaker（waterproof）Φ=35mm，H=25mm，16Ω， 1W

DP770 The silicone number buttons； with photopermeability

1 16 7MHS-4002-01A-W DP770 LCD Cupronickel stents; Xianfeng Hardware 1 17 7MHC-4002-11A-W

cupronickel

1 18 4PC7-4002H-A LCD display ZYW-T18CP-20PJ-B 1

19 7MHS-4002-03A-W

Numeric key METAL DO ME dia meter 4.0；SUS301

1 20 6PM7-4002-HKG DP770KEY-LCD PCB Four-layer board 1

22 7GCM-180090015-J

23 7GCM-100090015-J

7SMF-026060M-SZHT-B

DP770 main board double-s ided adhe sive f oam bl ack f oam 18*9*1.5 LCD Socket black foam doublefoam10*9*1.5

27 6SS3-DC7198-A KB-77B battery 1 28 7MHM-4002-02-W Aluminum chasis Poron , liner, Poron 36.5*2.5*1.0 1

7SAF-020110M-SZYB-Z

2 30 7MHR-4002-19A-W9 DP770 Screw waterproof r ubber r in g; black;polished 4 31 7GCB-070045005-J

Φ7 Microphone protection water perforated film with plastic

35 3CR7-SMA-50JF-4 Antenna connector SMA-J, Flange installation 1 36 7MHR-4002-15A-W9 DP770 antenna connector Waterproof pad silicone;blac k 1 37 4MV3-KFF081522 φ8Dc motor vibration KFF081522 1 38 7MHR-4002-17A-W9 DP770 Motor silicone pad sil ica gel; black 1

39 7MHS-4002-02A-W

color; Junyu, lead free

1 40 7MHR-4002-18A-W9 DP770 Discharge seatin g silicone; black 1

41 7MHP-4002-01A-W TD7700 battery connector BC-2P-41PH-6.8H 1 42 7MHC-4002-02A-W

DP770 shielding cover hol der一 43.4*32.3mm; cupronickel

1 43 7MBM-S4002-A EMI Gasket 12*7*7 With double-sided adhesive 3 44 7MHC-4002-16A-W1 GPS shielding cover base , c upronickel; Junyu; Lead free 1

Page 23 of 102

DP770 Service Manual

M2*5 plum blossom iron hardened tooth machine screw, 49

7MHS-4002-04A-W

DP770 PTT key METAL DOME4.0; SUS301

7MHS-4002-05A-W

DP770

,0.6mm

7MDZ-1737-04A-J5

KB-58L sticker 1

,8*35*0.2

6SS1-4002-HL1G

Main flat cable

46.85x32.25x0.15mm

7MHR-4002-12A-W3

DP770 emergency key silica gel key；orange，PT021C

7SMF-020050M-MHHTN1

nickel plating

10 48 6PD7-4002-HPC DP770PTT board PCB double side board 1

Platooninsert tabletting stainless steel

Barley paper

53 7MHC-4002-05A-W DP770 shielding cover 23.3* 16. 1mm; cupronickel 1 54 7MHC-4002-17A-W1 GPS shielding cover cupronickel; Junyu; lead free 1 55 7MHC-4002-03A-W DP770 shielding cover 43.9* 32. 8mm; cupronickel 1

56 7MHJ-4002-01A-W

GPS

hielding cover conductive fabric

1 57 8ATX-400470-WC DP770 dual mode ant enna 400-470MHZGPS antenna 1

58 7MHP-4002-03A-W9 DP770 knob PC+ABS/TPU, grey 1 59 7MHS-1767-02B-W PT6800Knob circlip stainless steelSUS30 4-1/2H, hardened 1 60 7NRC-077107040-Z R 7200 Coding switch nut br ass , zinc plating-black 1 61 7MHR-4002-13A-WC DP770 Guide pillar silicon e; transparent 1 62 7NRC-090110025-W1 Ant enna connector copper nut 1

Page 24 of 102

6. Tune Mode

Low

Frequency

Mid-frequen

High

frequency

Low

Frequency

Mid-frequen

High

frequency

It may need to check and adjust t he par ameters after parts replacement in maintenance.

6.1. Required parts in adjustment

（1）Antenna adapter （2）Universal interface

6.2. Adjusting and checking method

6.2.1. Frequency descri ptio n

Model 400~470MHz

DP770 Service Manual

Channel

TX frequency（MHz） 400.00 435.00 470 400 410 420 430 440 450 460 470 RX frequency（MHz） 400.05 435.05 469.95 400.05 410.05 420.05 430.05 440.05 450.05 460.05 469.95

Model 136~174MHz

Channel

TX frequency（MHz） 136.00 158.00 174.00 136.00 140.00 146.00 152.00 158.00 164.00 170.00 173.975 RX frequency（MHz） 136.05 158.05 174.00 135.05 140.05 146.05 152.05 158.05 164.05 170.05 174.00

F1 F2 F3 F4 F5 F6 F7 F8

Page 25 of 102

6.2.2. Adjustment Equipments

Test equipment

1)Enter tune mode;

5) Click “Save” to save it.

1)Enter tune mode;

2)Double click TX high power, and enter frequency F1 to F8 to adjust high power

3)Adjust the value in tune mode to make

frequency F1 to F8 to adjust low power

3)Adjust the value in tune mode to make

（1）Comprehensive t est inst r ument(HP8921 or similar equipment) （2）Computer and CPSp software （3）AEROFLEX 3920 （4）spectrum analyzer

6.2.3. Adjustment instruction of TX

Test Tool and Method Remark

Item Configuration

Test Point Tool Method

DP770 Service Manual

Frequency Stability

Tx High Power

Tx Low Power

Set comprehensive instrument to tx mode

HP8921A or similar instrument

Connect the antenna port to RF IN/OUT port of instrument by antenna connector adapter

2)Double click frequency stability

3)Adjust the value in tune mode to make the tx frequency to be within+/-480Hz

4) Observe TX current

output at different frequency. the tx high power to be within 4W+/-0.2W

4) Click “Save” to save it.

1)Enter tune mode;

2)Double click TX low power, and enter output at different frequency. the tx high power to be within 1W+/-0.2W

4) Observe TX current

5) Click “Save” to save it.

≤±500Hz

1) Power:3.7W-4.5W;

2) Current:<1.8A

1） Power:0.7W-1.5W;

2) Current:<1A

Page 26 of 102

DP770 Service Manual

1）Enter tune mode

Double click” Low frequency modulation

and enter to F1 to F8 to adjust

FM deviation on the instrument when AF

1）Enter tune mode deviation” and enter to F1 to F8 to adjust

FM deviation on the instrument when AF

Click “Start”, the radio will enter vox

Maximum Deviation

Low frequency modulation deviation

High Frqnecy modulation deviation

Set the test instrument to tx mode. Set HF(High filter) to 50Hz and LF(low filter) to 15KHz

）

Set comprehensive instrument to tx mode

P8921A or similar instrument

HP8921A or similar instrument

Connect the antenna port to RF IN/OUT port of instrument by antenna connector adapter

1) Enter tune mode;

2) Double click "Maximum Deviation".

3)Adjust the value in tune mode and view the FM deviation on the test instrument

4) Make the FM deviation within 5.0±0.05kHz

5) Click confirm to save

2） deviation” different frequency.

）Adjust th e valu e in tun e mo de an d view the

Freq is 0.1kHz 4

）Make the FM deviation within

5.0±0.05kHz. 5）Click save to save the data.

2）Double click” high frequency modulation different frequency.

）Adjust th e valu e in tun e mo de an d view the

Freq is 6.0kHz 4

）Make the FM deviation within

5.0±0.05kHz. 5）Click save to save the data.

4.95kHz-5.05kHz

Set comprehensive

VOX 1

instrument to tx mode 1) AFGen1 Freq:1kHz;

2)AFGen1 Lvl:50mV

HP8921A or similar instrument

Connect mic port of the radio to audio out of test instrument

1）Enter tune mode 2）Double click”VOX1.

3） adjustment automatically. 4

）Click “stop” when the value is stable.

5）Click save to save the data.

Test: 1）The vox will activate then AFGen1 is set to50mV. The vox will stop when AFGen1 is below 15mV.

Page 27 of 102

VOX 10

The low battery starts to

the voltage is above 7.2V.

1）Enter tune mode.

4) After adjustment, click save

Equipment

Connect the

by test cable

Low battery warning

Set comprehensive instrument to tx mode 1) AFGen1 Freq:1kHz;

2)AFGen1 Lvl: 5mV

HP8921A or similar instrument

* multimeter

Connect mic port of the radio to audio out of test instrument

Battery connector

1）Enter tune mode 2）Double click”VOX10”.

3） Click “Start”, the radio will enter vox adjustment automatically. 4）Click “stop” when the value is stable.

5）Click save to save the data.

1）Enter t tune mode 2）Set the power supply voltage to 6.8V； 3）Click save when value is stable.

DP770 Service Manual

work when the voltage is below 6.5V. The radio will power off when the voltage is below

5.8V. The radio can work when

CV Curve PC

6.2.4. Receiver section adjustment instruction

Item Configuration

Receiver sensitivity

1)Set comprehensive instrument to RX mode

2）Set RF Gen Freq to F1、 F2、…、F8，Eg：Set RF Gen Freq to 469.95MHz when testing F8 3）Set AFGen1 Freq to 1kHz

Set AFGen1 to 3kHz

4)Set HF(High filter) to 300Hz

and LF(low filter) to 3KHz

2）Double click “TX CV Curve”

Click “Start”

3）

Test Tool and Method Test

Test point Tool Method

antenna port to

HP8921A or similar instrument

RF IN/OUT port of instrument by antenna connector adapter, Connect

universal connector

radio to audio in

1) Enter tune mode

2) Double click “receiver sensitivity”. Enter F1 to F8 to adjust different frequency.

3）Set input signal strange to -119dBm, adjust

pc value to max the SINAD and the SINAD is above 12dB .

4）Click save to save it.

of test instrument

Low point：＞=0.5V High point：＜4.5V

Standard Requirement

SINAD>=12dB W：-119dBm；

N：-118dBm。

Page 28 of 102

SQL1 Open

1)Set comprehensive

1.5kHz（N）

1)Set comprehensive

1.5kHz（N）

1)Set comprehensive

1.5kHz（N）

1)Set comprehensive

1.5kHz（N）

SQL1 Close

SQL9 Open

SQL9 Close

instrument to RX mode

）Set RF Gen Freq to test

frequency

3)Set Amplitude t

-123d

Bm1(25KHz）or -121dBm

（12.5KHz）

4)Set AFGen1 Freq to 1kHz

5)Set FM to 3kHz（25KHz）

instrument to RX mode

）Set RF Gen Freq to test

frequency

3)Set Amplitude t

-125d

Bm(25KHz）or -123dBm

（12.5KHz）

4)Set AFGen1 Freq to 1kHz

5)Set FM to 3kHz（25KHz）

instrument to RX mode

）Set RF Gen Freq to test

frequency

3)Set Amplitude to -116dBm

4)Set AFGen1 Freq to 1kHz

5) Set FM to 3kHz（25KHz）

instrument to RX mode

）Set RF Gen Freq to test

frequency

3)Set Amplitude to -119dBm

4)Set AFGen1 Freq to 1kHz

5)Set FM to 3kHz（25KHz）

HP8921A or similar

instrument

Connect the antenna port to RF IN/OUT port of instrument by antenna connector adapter

DP770 Service Manual

1. Enter tune mode

2. Double click”SQL1 Open”and enter to F

o F8 to adjust different frequency

3. Click “Start”.

4. Click “Stop” when the value is stable.

5. Click save

1.Enter tune mode

2.Double click”SQL1 Open”and enter to F1 t

8 to adjust different frequency

3. Click “Start”.

4. Click “Stop” when the value is stable.

5. Click save

1.Enter tune mode

2.Double click”SQL9 Open”and enter to F1 t

8 to adjust different frequency

. C

lick “Start”.

4.Click “Stop” when the value is stable.

5.Click save

1.Enter tune mode

2.Double click”SQL9 Close”and enter to F1 to

F8 to adjust different frequency

. C

lick “Start”.

4. Click “Stop” when the value is stable.

5.Click save

Open:-119dBm Close -127dBm

Open:-115dBm Close -120dBm

Page 29 of 102

+ 73 hidden pages

Kirisun DP-770 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Electromagnetic Radiation Energy of Radio

Electromagnetic Interference

Explosive harmful gases

Antenna Damage

Replacing Spare Parts