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FP460 Service Manual

Page 8 of 53

The reference frequency of RD1846S is generated by 12.8MHz crystal oscillator X500

TCXO.

3.3 Principle of Receiver (RX)

Figure 3.3 Principle of Receiver

Receiver is mainly used in receiving, selecting, amplifying, transforming, demodulating

etc. and other processing like audio signal amplifying, filtering. Audio part mainly is used

to post emphasis, amplify and filter audio signal.

Receiver Front End

Low noise amplifier is located in the receiver front-end, mainly used in amplifying small

radio frequency signal, in order to provide certain intensity and SNR of RF signal for

subsequent signal processing.

Signals from the antenna transmission (RX/TX) switch (D502 D501, D503, D504), are

sent to Q507 3SK318 and peripheral components consisting of low noise amplifier (LNA)

for enlarging. The enlarged signal will be sent into IC4 (RDA1846S) to demodulate into

output audio signal. 3sk318 noise coefficient is 1.4 db, G about 18 db.

There is input and output match for LNA. Input match adopts best noise figure while

output use maximum power to match, i.e., the amplifier output impedance adjusted to the

load impedance (typically 50 ohm); Input and output impedance of the low noise pipe is

usually high impedance, so the matching circuit using inverted L

Receiver audio signal processing

LPF

ANT

RDA1846

LT1801A

POWER

AFAMP

LNA

Содержание FP460

Страница 1: ......

Страница 2: ...FM portable radios and is intended for use by engineers and professional technicians that have been trained by Kirisun It contains all the required service information for the equipment Kirisun reserves the right to modify the product structure and specifications without notice in order to enhance product performance and quality You can also contact your local dealer or us to get the latest servic...

Страница 3: ...a If the antenna has been damaged do not use the radio Damaged antenna may cause light burning to skin Replacement Parts All components used for repair should be supplied by Kirisun Components of the same type available on the market are not surely able to be used in this product and we do not guarantee the quality of the product using such components 1 3 Service All the Kirisun products are subje...

Страница 4: ... the key and talk to make a call release the key to listen 3 PF Button The button can be assigned different functions through PC software by your dealer Details refer to the following Programmable Key in this service manual 4 Speaker Output the voice 5 LCD Display Screen Display and indicate the operation status Details refer to the following LCD Display Screen in this instruction 6 Up Key 7 Menu ...

Страница 5: ...al it indicates red when receiving signal it indicates green It flashes when the power is not enough 14 Microphone Input the voice 15 Cancel Key In menu operation press the key to cancel the operation or return back to the previous menu 16 External Connector Open the cover to connect external speaker and microphone 17 Belt Clip Pushing Buckle 2 2 Functional Keys Operation Instruction Programmable ...

Страница 6: ...weak signal on analog channels Squelch level adjustment To adjust the signal strength Contact list To enter into the contact list interface to choose the number Scan Check activity of other channels Press the key to open close this function Temporarily delete unwanted channel Temporarily delete unwanted channel while scanning Kill To make other radio unusable Unkill To make the killed radio resume...

Страница 7: ... that the radio is receiving signal Hold on the call Indicate that the call is holding on without the need to redial 2 4LED Indicator Red LED lights on the radio is transmitting Green LED lights on the radio is receiving Red LED flashes low battery the battery needs to be charged 2 5 Basic Operation Turn On Off the radio Clockwise rotate the knob to turn on the radio and counter wise rotate the kn...

Страница 8: ...ng the signal the signal strength will be indicated on LCD While on digital channels when receiving private call group call all call the radio will output the voice While on the analog channels when receiving analog signal and the CTCSS CDCSS matches the radio will output the voice Answering a call While using digital channels press PTT within call holding time after receiving the call to answer t...

Страница 9: ...ntensity and SNR of RF signal for subsequent signal processing Signals from the antenna transmission RX TX switch D502 D501 D503 D504 are sent to Q507 3SK318 and peripheral components consisting of low noise amplifier LNA for enlarging The enlarged signal will be sent into IC4 RDA1846S to demodulate into output audio signal 3sk318 noise coefficient is 1 4 db G about 18 db There is input and output...

Страница 10: ...via Q502 Q503 Q501 are sent to Q500 power amplifier and then transmitted through receiving toggle sending into the low pass filter LPF will improve as much as possible to harmonic stray signal attenuation in certain condition of fluctuations in performance Q500 output power 4W Q502 2sc5108 pre amplifier mainly to preliminary enlarge output RF signal of RDA1846S to provide a certain intensity of th...

Страница 11: ...r amplifier drain current and changes the output power by changing the gain R520 R521 R522 are power amplifier current detection U502A is the current sampling amplifier power amplifier U502B is the comparison power amplifier If the transmitter output power is too large the power amplifier current increase U502A output rise U502B output voltage drops applied to Q500 Q501 bias voltage to drop lower ...

Страница 12: ... RDA1846S features 3 6 1 Fully integrated CMOS RF front end 3 6 2 High linearity and low noise amplifier and mixer 3 6 3 Low intermediate frequency receiving channel Automatic DC offset calibration circuit High performance analog digital converter and digital analog converter Fully integrated receive filters The digital AGC The frequency modulation demodulation technology based on digital signal p...

Страница 13: ...NC1 function key K4 IO TXD2 EFUNC2 function key monitor key A16 IO SCLK0 GPS Enable Pin A15 IO SSN0 TX_LED Transmitter indication B11 IO SRX0 RX_LED Receiver indication A11 IO STX0 LAMP keypad light N4 IO SIMCK PTT KEY PTT R4 IO SIMIO EXT_PTT PTT for earpiece P4 IO SIMRST Soft boot detection use this if you have any other functions Otherwise please use POW_ON A8 IO RFSO RFIF Three line SPI serial ...

Страница 14: ...AMP Keypad light E10 IO PWM1 LCD_BACK E7 GPO0 P_UL Indicate frequency lock state D7 GPO1 5T TX power control C7 GPO2 5R RX power control B7 GPO3 5C Radio frequency RF public power control CPU please don t use these 4 pins D9 IO RFSN1 P_PS PLL lock indicator C9 IO RFSN2 TX SW B5 IO OSCEN SPEAKER_EN B8 IO RFSCLK RFIF Three line SPI clock module P6 IO NC N1 IO LCDC3 LCD_D3 P1 IO LCDC4 LCD_D4 R1 IO LC...

Страница 15: ...put voltage range 1 VPP difference of 2 pp B1 AI RX_Q A1 AI RX_Q Simulation of the ADC module for single ended input voltage range 1 VPP difference of 2 pp A2 IO TX_I MOD1 B2 IO TX_I Simulation of DAC module voltage output range of single ended 1 VPP difference 2 VPP A4 IO TX_Q MOD2 B4 IO TX_Q Simulation of DAC module voltage output range of single ended 1 VPP difference 2 VPP G2 IO CODEC 16 Ohm 耳...

Страница 16: ... GPIO0_12 Hard boot detection L7 L8 L9 L10 RDA1846S port AVDD 1 Power supply SCLK 2 Clock input for serial control bus SDIO 3 Data input output for serial control bus AVDD 4 Power supply XTAL1 5 Oscillator pin 1 XTAL2 6 Oscillator pin 2 control interface select MODE 7 When MODE VL I2 C Interface is select When MODE VH SPI Interface is select SENB 8 Latch enable active low input for serial control ...

Страница 17: ...e VL GPIO3 29 Gpio3 sdo Gpio3 VH or VL it is the output register data in 4 wire control Interface mode GPIO2 30 Gpio2 int When Gpio2 VH int is active else VL GPIO1 31 Gpio1 code_in code_out Gpio1 VH or VL it is the input output code data GPIO0 32 Gpio0 css_in css_out Gpio0 VH or VL it is the input output CTCSS CDCSS signal 3 8 semiconductor devices functional description Item Model No Functions U5...

Страница 18: ... would be a slight difference in digital mode and in analog mode And the items displayed can be reprogramming by your dealer 4 1 Menu in digital mode If you choose a digital channel the main menu structure is as follows Call Log Press the Menu Key to access the main menu then press the Up Down Key to Call Log and press the OK key to confirm or press the shortcut Call Log Key to enter to Call Log Y...

Страница 19: ...ther the radio has been powered on or is active on the current channel secretly Only Individual Call log has this function 4 Kill You can send this command to the contact only private call contact to make the target radio disabled 5 Revive You can send this command to the killed radio only private call contact to make the target radio enabled 6 Set as default contact The default contact is the con...

Страница 20: ...ive command to the contact About the descriptions of Status Inquire Set as default contact Kill and Revive details refer to Call Log Section And other functions are as below 1 Detailed information You can check the contact s name number and call type 2 Edit You can edit the contact s name and number 3 Delete Delete the selected contact 4 New contact You can create an individual call contact into t...

Страница 21: ...d by selecting Delete Temp Channel function and then the scan continues And also you can temporarily add a channel by selecting Add Temp Channel function After existing scanning mode the temporarily added or deleted channel is invalid The scan list resumes its original channel Message Press the Menu Key to access the main menu then Press the Up Down Key to Messages and press the OK Key to confirm ...

Страница 22: ...e draft box stores the draft messages If the draft box is full the earliest draft messages will be covered and disappeared after saving a new draft message You can send edit and delete the message here Zone A zone is a group of channels You radio supports up to 16 channels and 16 zones with a maximum of 16 channels per zone Zone can be selected by menu Setting You can set your radio parameters as ...

Страница 23: ...ncy Key and Keypad Lock shortcut key are available when the keypad is locked You can set keypad lock function on off here 5 Alert Tone You can set alert tone function on off the alert tone here 6 Home Screen You can set what to display on your Home Screen including channel number channel frequency channel name zone number and zone alias 7 Battery Saver You can set battery saver function on off her...

Страница 24: ...r keypad lock status when no operation 4 3 2 TOT This function forbids you from occupying the channel for a long time If the continuous transmitting time exceeds the setting time by dealer the radio sends out a warning tone and stops transmitting Release the PTT key to stop the warning tone After a period of time which is set by dealer you can transmit again And if the radio is programmed with pre...

Страница 25: ... If you are in danger and this function is enabled you can press Emergency Alarm On shortcut key to send an emergency alarm The means of sending emergency alarm are decided by the following parameters Alarm Type which defines the audio and visual reaction when the radio sends an alarm Alarm Mode which defines the content sent to the other members when the radio sends an alarm The above parameters ...

Страница 26: ...to scaning We designed a user friendly and convenient programming software CPSc to set parameters on the radio The programming steps are as following Install the programming software of FP460 B Connect the radio to the computer serial port with the specified programming cable see figure17 C Turn on the radio power D Click the CPSc to run the programming software E Click read to read the data from ...

Страница 27: ...he battery towards the radio to lock it until a click is heard Notice Do not short circuit the battery terminals or dispose of batteries in fire Do not attempt to disassemble the case of the battery 5 2 Installing Removing the Antenna Installing Hold the base of the antenna and turn the antenna clockwise into the connector on the top of the radio until it s tightened Removing Hold the base of the ...

Страница 28: ...to the rear top of the battery fixed it with two 2 5x8 0 screws Loosen the two screws fixing clip you can remove the clip 5 4 Installing an optional headset When you use an external headset to open outward headphones cover in the upper right of the radio plug the external headphone cable into the headset port ...

Страница 29: ...ack cabinet 4 Remove those four screws on the Al alloy bracket 5 Insert the flat bladed screwdriver into the slot of Al alloy bracket lift it so as to separate 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 Using the soldering iron to separate the speaker connecting cable 5 6 Removing the PCB Board ...

Страница 30: ...d use the soldering iron to cut off the antenna connecting point and then separate the main board include PTT PCB from the aluminium alloy chassis After the demolition of the above you can make the appropriate repairs and debugging against fault conditions 5 7 Exploded view No Part Code Part Name Specifications Unit ...

Страница 31: ... 428649 Φ 40mm H 4 5mm 1 10 7MHP 4038 05A W0 FP460 PTT cover Double color 1 11 MIC Φ6 Stripline 1 12 7MBR 4038 02A W0 FP460 Speaker silicone pad Silica gel Black 1 13 7MHR 4038 04A WC FP460 Light pipe Silica gel transparent high light With 40mm speakers 1 14 7MHP 4038 12A W0 FP460 Speaker stand ABS Black 1 15 Screw ST2 5 5 Rolled flat end black 2 16 4SS7 4005 016 100 C Speaker Φ40 Impedance 16Ω po...

Страница 32: ...n splinter Imports of stainless steel 0 3mm 1 33 7MHP 4038 09B W0 FP460 Power on left hook POM Black high light 1 34 7MHP 4038 08B W0 FP460 Power on Push Button PC ABS Black texture 1 35 7MDP 4057 02A W0 KB 460 Battery case back PC ABS Black texture 1 36 7SMF 020080M MH HT N1 M2 8 Plum type Thick Head Machine Screw Iron and hard Φ2mm 8mm thick plum type nickel plated machine Metric Coarse drop res...

Страница 33: ...US304 Natural color 1 48 7MHP 4038 11A W0 FP460 Surface shell PC ABS Black texture 1 49 7MHJ 4038 02A W FP460 Key board backing 3M9448 1 50 6SS1 4038 HKA FP460 Key board PCB parts 1 51 7MHS 4038 01A W FP460 digital keypad metal dome φ4mm SUS301 round metal dome waterproof 1 Chapter 6 Adjustment 6 1 Method of Adjustment During the servicing it is necessary to test and adjust the radio s technical p...

Страница 34: ...nts and save it when the data is stable b Set the RF signal of the comprehensive tester to be 123dBm and the deviation 3 0kHz 1 5kHz wide narrow band In PC mode adjust the SQL of the 5 frequency points and save it when the data is stable Chapter7 Major Specification 7 1 General Specification Model FP460 Frequency 136 174 MHz 400 470 MHz Number of Control Channel 16 Zones x 16 Channels Channel spac...

Страница 35: ... channel Tx power 60dbm 50dbm Spurious Tx 36dB Tx current consumption 1 4A 7 4V DC Chapter 8 Service and Test Equipment During the servicing and test process the following equipments and apparatus will be used No Equipments Specifications 1 Standard signal generator Frequency range 400 470MHz Modulation FM and external modulation Output 127dBm 0 1 uV to 47dBm 1mV 2 Power meter Output impedance 50 ...

Страница 36: ...Ω dummy load Around 16Ω 3W 14 Adjustable power supply 5v 10v around 5A Chapter 9 Troubleshooting No Problems Causes and solutions 1 Power ON failure A The battery pack may be out of power Please charge it or change a new one B Power switch in failure Change a new one C MCU in failure Change the IC D Zener diode Q45 is broken Change a new IC 2 PPL unlocked beeping A The PLL crystal oscillator X500 ...

Страница 37: ...lights green while receiving but no sound is heard A The speaker is broken Please change it B The audio power amplifier U600 is broken Please change it C The switch diode Q601 is broken Please change it 7 The programming is abnormal A The programming cable is not correctly connected to PC Please check the cable connection B The Computer s RS 232 serial port output is abnormal Please check the comp...

Страница 38: ...ches parts no Pb 1 6SS1 4038 HMB FP460 02 mainboard patches parts Version D 400 470MHZ FP460 02 mainboard patches parts no Pb 1 0SS1 4038 HMD FP460 mainboard patches parts FP460 mainboard patches parts 1846S no Pb 1 3CF1 BL112 30RU FFC FPC connector 0 5mm spacing 30 Pin horizontal type 1 J201 1DP1 BV08C R protected diode BV08C 2 D600 D601 1DR1 NSR1020MW2T1G Surface mounting schttky diode NSR1020MW...

Страница 39: ...Surface mounting constant voltage IC Constant voltage integration 5V SOT 23 5 1 IC100 1TF1 2SK1824 R FET 2SK1824 B1 1 Q506 1TF1 3SK318 R dual gate fet 3SK318 YB 1 Q507 1TF1 RD01MUS2 E R FET 1 Q501 1TF1 RD07MUS2B E R FET Mitsubishi RD07MUS2B no Pb 1 Q500 1TF1 ST2302 R FET ST2302 SOT 23 2 Q602 Q603 1TT1 2SA1586 R Surface mounting triode 2SA1586 1 Q605 1TT1 2SC3356 R24 R Surface mounting triode 2SC33...

Страница 40: ... 117 C127 C223 C224 C228 C 229 C300 C302 C303 C304 C 305 C306 C307 C309 C311 C 312 C322 C323 C324 C325 C 400 C601 C608 C616 2CC1 10 X7R160 333K R flake multilayer capacitor 1005 33nF 10 16V X7R 1 C583 2CC1 10 X7R250 223K R flake multilayer capacitor 1005 22nF 10 25V X7R 1 C584 2CC1 10 X7R500 102K R flake multilayer capacitor 1005 1000P 10 50V X7R 11 C120 C124 C226 C512 C536 C545 C547 C562 C563 C57...

Страница 41: ...flake multilayer capacitor 1608 8P 0 25P 50V C0G 1 C508 2CC1 16 X7R500 471K R flake multilayer capacitor 1608 470P 10 50V X7R 1 C511 2CC1 20 X7R6R3 475K R flake multilayer capacitor 2012 4 7uF 10 6 3V X7R GR M219R6J475KE19D 2 C27 C542 2CC1 20 Y5V160 106Z flake multilayer capacitor 2012 10uF 80 20 16V Y5V 18 C2 C103 C108 C116 C121 C 123 C131 C200 C205 C212 C 216 C227 C582 C602 C606 C 615 C119 C129 ...

Страница 42: ...tance 3 5 3 0 2 1 47UH 10 CD32 470K no Pb 2 L107 L110 2RE1 10 1502 Surface mounting exact Resistor 1005 15KΩ 1 1 R23 2RE1 10 1602 Surface mounting exact Resistor 1005 16 2K 1 1 R106 2RE1 10 4909 Surface mounting exact Resistor 1005 49 9K 1 1 R104 2RE1 10 6409 Surface mounting exact Resistor 1005 64 9K 1 1 R113 2RE1 10 8006 Surface mounting exact Resistor 1005 80 6K 1 1 R112 2RE1 16 1503 R Surface ...

Страница 43: ...600 2RS1 10 223J R Chip Resistor 1005 22K 5 2 R27 R614 2RS1 10 271J R Chip Resistor 1005 270Ω 5 1 R505 2RS1 10 273J R Chip Resistor 1005 27K 5 1 R531 2RS1 10 274J R Chip Resistor 1005 270K 5 1 R105 2RS1 10 204J R Chip Resistor 1005 200K 5 1 R340 2RS1 10 330J R Chip Resistor 1005 33Ω 5 1 R510 2RS1 10 333J R Chip Resistor 1005 33K 5 2 R609 C611 2RS1 10 334J R Chip Resistor 1005 330K 5 1 R315 2RS1 10...

Страница 44: ...re compensated crystal oscilator KDS DSA321SDA 18 432MHz 2 5PPm 40 85 3 2 2 5 0 9mm 1 X300 5OT1 12R8 CEC3 0503 R Surface mounting Temperature compensated crystal oscilator NT5032SA NT5032SC 12 8MHz 2 5PPm 5 0 3 2 1 6mm 1 X500 5XT1 MC146 32R76K E Surface mounting Ceramic Rasonator 32 768KHZ MC 146 12 5PF 20P PM no Pb 1 X301 7MDC 4057 02A G FP460 DP460 battery springy splinter Material brass Nickel ...

Страница 45: ...TC144EE 26 SOT323 1 Q201 4PE1 16 F9 A Surface mounting LED LED 0603 white Height 0 4mm 6 D1 D2 D3 D4 D5 D205 2RS1 10 100J R Chip resistor 1005 10Ω 5 3 R1 R2 R244 2RS1 10 221J R Chip resistor 1005 220Ω 5 1 R250 6PD7 4038 HKD FP460 keyborad Two layer board DP460U KEY 121205 thickness 0 6MM Material FR 4 46 6X40MM no Pb 1 Appendix 3 Spare Parts List Structure Part 0SS3 4038 HMB FP460 mainframe assemb...

Страница 46: ...ced horizontally backlight 42 7mm Height Zhongyiwei Lead free 1 7SMF 020040M SZYB N R M2 4 Cross round flat head machine screws 558 PT4200 PT558S 5200 PT Material hardened iron Φ2mm 4mmCross round flat head nickel plating machine teeth metric coarse thread NYLOK 8 To lock the main PCB board and antenna connector 7SMF 020080M MHHT N1 R M2 8 wintersweet type thick head machine screws 558 E66 PT558 4...

Страница 47: ...ica side key Material silica gel black laser carving PT Orange21C Mingkun Lead free 1 7MHR 4038 04A WC FP460 light pipe Material silica gel transparent hightlight adapt with 40mm speaker Mingkun Lead free 1 7MHM 4038 02A W9 FP460 LCD spong Material T 0 5mm spong black one side with glue PET Xinlongda Lead free 1 7MHJ 4038 01B W FP460 Lens back glue Material 3M9448 Xinlongda Lead free 1 7MHJ 4038 0...

Страница 48: ...02A W0 GD 9 Belt Clip Spindle SUS304 passed 48H salt spray test Lead free 1 Appendix 4 Accessories reference List Accessories Quantity Antenna 1 Belt Clip 1 Earphone Cover 1 Screw 1 Battery 1 Charger 1 Adaptor 1 Instruction Book 1 Warranty Card 1 Sling 1 Figure1 FP460 Schematic Pane Diagram Charger Battery Belt Clip Adaptor Antenn Sling ...

Страница 49: ...FP460 Service Manual Page 48 of 53 ...

Страница 50: ...FP460 Service Manual Page 49 of 53 ...

Страница 51: ...FP460 Service Manual Page 50 of 53 ...

Страница 52: ...FP460 Service Manual Page 51 of 53 Figure2 FP460 Top Board Position Mark Diagram ...

Страница 53: ...FP460 Service Manual Page 52 of 53 Figure3 FP460 Bottom Board Position Mark Diagram ...

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