HYT Science and Technology Co TC3000V Two-Way Radio User Manual

Shenzhen HYT Science &Technology; Co Ltd Two-Way Radio Users Manual

Contents

Users Manual

1Content General Brief Introduction Radio Modes Circuit Description CPU Pins Adjustment Description TC3000-U Part List (Control Board) TC3000-U Part List (RF Board) TC3000-V Part List (Control Board) TC3000-V Part List (RF Board) Disassembly and Assembly for Repair Exploded View Part List 2 Packing TC3000-U PC Board View TC3000-V PC Board View TC3000 Block Diagram TC3000-U Schematic Diagram TC3000-V Schematic Diagram Specification
2General Manual Scope This manual is intended for use by experienced technicians familiar with similar types of communication equipment. It contains all service information required for the equipment and is current as of the publication date. User Safety Information The following precautions are recommended for personnel safety:  DO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated.  SHUT OFF and do not operate this equipment near electrical blasting caps or in an explosive atmosphere.  When in vehicles with an airbag, do not place a portable radio in the area over an airbag or in the airbag deployment area.  Do not expose the radio to direct sunlight for a long time nor place it close to a heating source.  Do not use any portable radio with a damaged antenna. If a damaged antenna comes into contact with your skin, a minor burn may result.  When transmitting with a portable radio, hold the radio in a vertical position with its microphone about 5 centimeters away from your mouth.  If you wear a portable radio on your body, be sure to keep the antenna at least 2.5 centimeters away from your head or body when transmitting.  This equipment should be serviced by a qualified technician only.
3Brief Introduction (1) Antenna Used to transmit/receive signals. (2) LED Following table indicates LED indication and corresponding radio status. LED Status No display Standby Green Receive Red Transmit Flashing green Scan Flashing red Low battery voltage Flashing orange Call waiting (3) Channel Selector Used to select wanted channel. (4) Programmable key [A] (5) Power/Volume Control Knob Rotate the Power/Volume Knob clockwise until a “click” is heard to turn the radio on, fully counter clockwise to turn the radio off. When the radio is on, turn the knob to adjust volume. (6) Battery Latch Used to fasten the battery. (7) Speaker Used to output sounds. (8) Microphone Used to input sounds. (9) External Jack Used to connect with external earphone or programming cable. (10) Belt Clip Used to clip the radio on your belt.
4(11) Battery Pack (12) PTT key Press and hold PTT, radio operates in transmit mode. Release PTT, radio returns to receive mode. (13) Programmable Key [B] (14) Programmable Key [C] The following table shows the key function when briefly pressed, pressed and held or held down: Key function Key Function Briefly Press Press and Hold Hold DownEmergency Siren Enable emergency siren Disable emergency siren － Monitor － － Monitor Scan Enable/Disable scan Enable/Disable scan － Nuisance Delete Delete nuisance channel in scan Delete nuisance channel in scan － Select High/Low Power Select High/Low Power Select High/Low Power － Repeater/Talk Around Select Repeater or Talk Around Mode Select Repeater or Talk Around Mode － Repeater/Reverse Frequency Select Repeater or Reverse Frequency ModeSelect Repeater or Reverse Frequency Mode － Call Transmit a Call Transmit a Call － Note: Please contact your dealer for more details about programmable keys.
5Radio Modes Radio Feature Description 1. CTCSS/CDCSS/2-Tone/5-Tone 2. Channel Spacing 25KHz/12.5KHz (Wide/Narrow) 3. Programmable key 4. Squelch Tail Elimination 5. Priority Channel Scan/Nuisance Delete 6. Busy Channel Lockout 7. High/Low Power 8. Emergency Siren 9. Repeater/Talk Around 10. Call 11. TOT 12. VOX 13. Battery Save 14. Low Battery Alert 15. Voice Compression and Expansion 16. Software Upgrade 17. Wired Clone 18. PC Mode Frame of Radio Modes Entry for Mode Startup User Mode Turn the power on to enter user mode. This mode is for normal operation. Clone Mode 1) Connect the two radios with the clone cable. Turn the power on while holding down PTT and programmable key B simultaneously. After two seconds, a BEEP sounds and LED glows orange indicating that the radio enters clone mode. 2) In clone mode, pressing programmable key B can begin wired clone. MCU transmit data Power On User Mode Clone Mode PC Mode Adjustment Mode All Reset Mode
6directly through UART port. During cloning, LED of source radio flashes red and that of target radio flashes green. A BEEP sounds when cloning is complete. PC Mode 1) Connect the radio with a PC by programming cable. And then turn the power on. The radio enters PC mode after two seconds and LED glows orange. 2) Data can be transferred between MCU and PC via UART port. If data is transferred to the radio from PC, it can be programmed into the EEPROM by MCU and LED flashes red during data transfer. If data is transferred to PC from the radio, MCU sends the EEPROM data to PC and LED flashes green during data transfer. 3) You can update software and provide second development feature for the user via PC update programme. LED flashes orange during programme download. 4) To exit PC mode and enter conventional mode or other mode, turn on the power again. All Reset Mode Turn on the power while holding down PTT and programmable key A simultaneously (or short circuit the two SELF points) to enter all reset mode. The EEPROM data is all reset. A BEEP sounds and LED glows orange when All Reset is complete. Adjustment Mode Turn the power on while holding down PTT and programmable key C, after two seconds, the radio enters adjustment mode. LED glows orange. Rotate channel selector knob to select corresponding test item. Hold down A key to switch between wideband and narrowband. Briefly press A key to save data. Press B key to adjust upwards and C downwards. Press PTT to transmit or switch among center, low and high frequency. CH1-CH16 are defined as following: CH1: Transmitting VCO; CH2: Receiving VCO; CH3: Frequency Accuracy; CH4: High power;
7CH5: Low power; CH6: CDCSS balance; CH7: Maximum frequency deviation; CH8: MIC sensitivity; CH9: CTCSS deviation; CH10: CDCSS deviation; CH11: FFSK deviation; CH12: TONE deviation; CH13: Receiving sensitivity; CH14: Squelch level; CH15: Low battery alert level; CH16: VOX sensitivity.
8Circuit Description 1. Power Supply Power supply of the radio is derived from the battery, which supplies battery B+ after passing through fuse 3A and then feeds through power switch. The power supplies voltage for three AVRs. IC505 supplies 5V (5M) voltage for the control circuit. IC9 supplies 5V (5C) voltage for the shared circuit. And IC6 supplies voltage for the transmit/receive circuit. In transmit mode, 5TC becomes low voltage and Q3 is turned on to supply 5V(5T) voltage for the transmit circuit. In receive mode, 5RC becomes low voltage and Q2 is turned on to supply 5V (5R) voltage for the receive circuit. BATT FUSEPROTECT 5C5MBUFF1/2BIASAVRAVRSW5R5TAVRSWSWSAVE5RC5TC Fig. 1 Power Supply Block Diagram 2. PLL Frequency Synthesizer PLL circuit generates the first local oscillator signal for reception and RF signal for transmission. CPUQ416ULX401IC400PLLIC500CVCLK,DAT,EN TCXOVCO BUFF SWMBD100T/RTo Drive AmpBUFF D103SWTo MixerQ310 Fig2. PLL circuit 1) PLL IC400 is fractional divider. Step frequency of PLL circuit is 2.5KHz or 6.25KHz. A 16.8MHz reference oscillator signal is divided at IC400 by a fixed counter to generate a 20KHz or 50KHz reference frequency. Output signal from VCO is buffer amplified by Q416 and divided at IC400 by a frequency divider. Divided signal is compared in the phase comparator with 20KHz or 50KHz reference signal of IC400.
9Output signal from phase comparator is filtered through a low pass filter and passed to the VCO to control oscillator frequency. 2) VCO The operating frequency is generated by Q352 in transmit mode and by Q350 in receive mode. Operating frequency generates a control voltage by phase comparator to control varactor diodes so that the oscillator frequency is the same as the MCU preset frequency (D350, D352, D354 and D355 in transmit mode and D351, D353, D356 and D357 in receive mode). T/R pin is set high level in receive mode and low in transmit mode. The output from Q352 and Q350 is amplified by Q354 and sent to buffer amplifier. 3) Unlock Detector An unlock condition appears if low level appears at LOCK pin of IC400. Transmission is forbidden if this condition is detected by microprocessor. 3. Receiver The receiver utilizes double conversion superheterodyne. CANTANTSWBPF Q201RF AMP BPF MCFXF201 IF AMPQ222MIXERIC218CF201,202IF,MIX,DETIC204AF AMPIC720 SP1st Local OSC(PLL) 2nd Local OSCIF AMPQ216 Fig.3 Receiver Section Configuration 1) Front-end Amplifier The signal from antenna is amplified at RF amplifier (Q201) after passing through a transmit/receive switch circuit and a band pass filter. The amplified signal is filtered through a band pass filter to remove unwanted signals before it passes the first mixer. 2) First Mixer The signal from RF amplifier is mixed with the first local oscillator signal from PLL frequency synthesizer circuit at the first mixer (IC218) to create a 44.85MHz first IF signal. The first IF signal is then fed through a crystal filter (XF201) to further remove spurious signals from adjacent channel. 3) IF Amplifier The first IF signal is amplified by Q216 before passing through crystal filter and by Q222 after crystal filter and then enters IF processing chip IC204. The signal is mixed with the second local oscillator signal again in IC204 to create a 455KHz second IF signal. The second IF signal then passes through a 455KHz ceramic filter (wideband: CF201/narrowband: CF202) to eliminate unwanted signals before it is amplified and detected in IC204. 4) Narrowband/Wideband Switch Circuit Turn on ceramic filter CF201 (wideband)/CF202 (narrowband) to set each channel as
10wideband or narrowband. W/N pin of IC500 outputs wideband (high level) and narrowband (low level) signal. 5) AF Amplifier The result AF signal from IC204 is amplified by IC606, and then passes through AF processing chip IC601 and compander IC603. The processed AF signal is then amplified by an AF power amplifier (IC720) to drive the speaker. 4. Transmitter 1) AF and Signaling Modulating signal from the microphone passes through Q700 switch and compander IC603 before it enters AF processing chip IC601. Under the control of MCU, IC601 produces DTMF/CTCSS/CDCSS/2-Tone/5-Tone signaling, which then pass through MOD and enter VCO together with the modulating signal for direct FM modulation. (See fig.5) 2) RF Amplifier The transmit signal from VCO buffer amplifier (Q310) is amplified by Q101 and Q102. The amplified signal is then amplified by the power amplifier Q105 and Q107 (include a two-stage FET amplifier) to create 4.0W RF power. (See fig.4) DCBATitleAMPQ101.1025TDRIVE AMPQ105FINAL AMPQ107ANT SWD101 LPFANTANT SWD201.202RXQ106SWQ109SW5TIC100APCDETQ103.Q104B SWBAPC5TTH101SWQ110 5TQ108SW 5TC Fig.4 APC System 3) Antenna Switch and LPF Output signal from RF amplifier passes through a low-pass filter network and a transmit/receive switch circuit comprised of D101, D201 and D202 before it reaches the antenna terminal. D201 and D202 is turned on (conductive) in transmit mode and off (isolated) in receive mode. 4) APC The automatic power control (APC) circuit stabilizes the transmit output power by detecting the drain current of final stage amplifier FET. IC100 (2/2) compares the preset reference voltage with the voltage obtained from final current. APC voltage is proportional to the difference between auto detect voltage and reference voltage
11output from IC100 (1/2). The output voltage controls FET power amplifier and keeps the transmitter output power constant. The output voltage can be varied by the microprocessor, which hence controls the transmitter output power. 5. Signalling Section The block diagram of signaling section is shown as figure 5. D601LIMITTERX601BASEBAND PROCESSORIC601BBP_IRQNBBP_RPLSPMIC SWQ700 AF PAIC710SWQ710MICAUDIO_ENEXT_SPK+EXT_MICBBP_CSNBBP_CMDBBP_CLKQ701SWEXT_MIC_SELEXT_SP_SELIC605BUFFER VerVbiasCOMPANDERIC603SWCOM_SW EXP EXP_SWIC604MODMBCOMPRESSOR EXPANDERAF PAMIC_FBAUDIOSWCOMIC606BUFF AMPVbiasIC611FILTERAF DET Fig.5 AF and Signalling Circuit In the transmit section, signallings (CTCSS, CDCSS, DTMF, 2-Tone and 5-Tone) are produced by IC601 under the control of MCU and enter VCO together with AF signal from MIC for modulation. In the receive section, after buffer amplified together with IF demodulation signals, the signallings enter IC601 for decode. The decoded data is then sent to MCU for recognition. 6. Control System The IC500 CPU operates at 9.8304MHz. The block diagram of MCU control system is shown as following:
12MCUSAVEAPC/TVBATT DetVOL LevelCH Encode5TC5RCW/NMUTET/RBEEPLEDAP SW I/ERSSIPTTKEY SWTXD/RXDCTC/CDC CodecE2PROM FLASHAF ProcessorPLL ICRESET Fig.6 MCU Block Diagram Circuit in this section is mainly comprised of MCU, EEPROM, FLASH and reset IC etc. MCU control circuit accomplishes the following functions: accomplish the reset initialization according to the programmed feature of the radio when power on; detect key signal and monitor battery voltage; send necessary frequency data to PLL according to encode of the channel; switch and control transmit/receive according to the signal input from PTT; turn on/off the mute circuit according to the input signaling decode signal and squelch level signal; output control signal to control the light/off of LED; output BEEP signal to drive the speaker.
13CPU Pins No. Port Name I/O Feature Description 1 P94 O Ver Frequency accuracy adjustment 2 P93 O APC/TV Transmit power/receiving sensitivity adjustment 3 P92 I Key1 NC 4 P91 I External option judgement NC 5 P90 I SELF All reset mode control; ground this pin to enter all reset mode 6 BYTE I VCC 8 bit external data bus 7 CNVSS I GND MCU operates in single-chip mode after reset 8 P87 I Key2 NC 9 P86 I Key3 NC 10 RESET I Reset IC MCU reset when low level is input 11 Xout O Crystal oscillator output 9.8304M crystal oscillator 12 Vss I GND Ground 13 Xin I Crystal oscillator input 9.8304M crystal oscillator 14 Vcc I VCC Power supply 15 P85 I NMI Connect with high level 16 P84 I EN0 Channel selector knob input 17 P83 I SW1 A key 18 P82 I BBP_IRQN CMX881 interrupt output 19 P81 I BBP_RPL CMX881 data output 20 P80 O BBP_CLK CMX881 clock input 21 P77 O BBP_CMD CMX881 data input 22 P76 O BBP_CSN CMX881data enable, low level: Enable 23 P75 O AUDIO_EN AF amplifier control H: Enable L: Standby 24 P74 O COM_SW Compressor enable H: Enable L: Disable 25 P73 O EXP_SW Expander enable H: Enable L: Disable 26 P72 O W/N Narrowband/wideband H: Wideband L: Narrowband 27 P71 I/O EEPROM_DATA EEPROM data 28 P70 O EEPROM_CLOCK EEPROM clock input 29 P67 O NULL NC 30 P66 O NULL NC 31 P65 I LOCK PLL unlock detect H: PLL lock L: PLL unlock 32 P64 O PLL_EN PLL IC strobe 33 P63 O TXD Serial data output 34 P62 I RXD Serial data input 35 P61 I Key4 NC 36 P60 I External option judgement NC 37 P57 O VCC Clock output, connected to high level (Null) 38 P56 NULL NC 39 P55 I VCC HOLD pin, connected to high level (Null)
1440 P54 NULL NC 41 P53 NULL NC 42 P52 O OE Flash data output enable, active low 43 P51 NULL NC 44 P50 O WE Flash data input enable, active low 45 P47 I OPTION2 External accessory select 46 P46 I OPTION1 External accessory select 47 P45 O T/R Transmit/receive PLL select H: receive L: transmit 48 P44 O CE Flash chip select, active low 49 P43 NULL NC 50 P42 O A18 Flash address 51 P41 O A17 Flash address 52 P40 O A16 Flash address 53 P37 O A15 Flash address 54 P36 O A14 Flash address 55 P35 O A13 Flash address 56 P34 O A12 Flash address 57 P33 O A11 Flash address 58 P32 O A10 Flash address 59 P31 O A9 Flash address 60 Vcc I VCC 61 P30 O A8 Flash address 62 Vss I GND 63 P27 O A7 Flash address 64 P26 O A6 Flash address 65 P25 O A5 Flash address 66 P24 O A4 Flash address 67 P23 O A3 Flash address 68 P22 O A2 Flash address 69 P21 O A1 Flash address 70 P20 O A0 Flash address 71 P17 I SW3 C key 72 P16 I SW2 B key 73 P15 I PTT PTT key 74 P14 O LR Red LED control H: light L: off 75 P13 O LG Green LED control H: light L: off 76 P12 O SAVE Battery save control H: off L: on 77 P11 O 5TC Transmit circuit power supply control H: off L: on 78 P10 O 5RC Receive circuit power supply control H: off L: on
1579 P07 I/O D7 Flash data 80 P06 I/O D6 Flash data 81 P05 I/O D5 Flash data 82 P04 I/O D4 Flash data 83 P03 I/O D3 Flash data 84 P02 I/O D2 Flash data 85 P01 I/O D1 Flash data 86 P00 I/O D0 Flash data 87 P107 I EN3 Channel selector knob input 88 P106 I EN2 Channel selector knob input 89 P105 I EN1 Channel selector knob input 90 P104 I CTCSS_IN CTCSS input 91 P103 I BATTD Low battery level detect (analogue) 92 P102 I SQL Squelch level input (analogue) 93 P101 I RSSI RSSI detect pin (analogue) 94 Avss I VCC A/D conversion power supply input 95 P100 I VOL Volume knob input (analogue) 96 Vref I VCC Battery detect reference voltage 97 Avcc I VCC A/D conversion power supply input 98 P97 NULL NC 99 P96 O PLL_DATA PLL IC data input 100 P95 O PLL_CLK PLL IC clock
16Adjustment Description Required Test Instrument Radio communication test set 1 set Scanner 1 set 3A/10V power supply 1 set Digital voltmeter 1 set 3A Ammeter 1 set Preparation Open the programming software in PC and operate as the following instructions. 1. Programme Download: Connect the radio with the computer via programming cable. And then turn the power on. LED glows red. Click “Programme” → “Download” on the interface to choose programme. Click “Open” to begin download and LED flashes red. When download is complete, click “End” and turn the power off. And then disconnect the programming cable. 2. Initialization: Turn the power on while holding down [PTT] and [A] key simultaneously. LED glows orange and a BEEP sounds. Radio channel frequency and setting data are initialized. 3. Destination Set: Connect the radio with the computer via programming cable. And then turn the power on. LED glows red. Set “frequency range” on the programming software interface. And then click “Programme” → “ Writing”. 4. Factory Setting The compander is open. Squelch level 2. Adjustment mode is disabled. Adjustment VCO Measurement Adjustment Item Condition Test Instrument Terminal Part Method Specification/Remarks 1. Setting Power supply 7.5V 1.Turn to CH1. PressPTT. TX High Check 3.3V±0.2V 2.Transmit VCO lock voltage 2. Press PTT again.TX Low Check 1.0V±0.4V 1. Turn to CH2. PressPTT. TX High Check 3.1V±0.2V 3. Receiving VCO lock voltage 2. Press PTT again.TX Low Digital Voltmeter CV TC350 TC351 Check 1.0V±0.4V
17 Transmitter Measurement Adjustment Item Condition Test Instrument Terminal Part Method Specification/Remarks 1. Transmit frequency Turn to CH3. Press PTT. Radio Communication Test Set ANT [B] (up) [C] (down) Adjust to center frequency. Press [A] to save. Error≤150Hz 1. Turn to CH4. Press PTT. Center frequency Adjust to 4.0 W, I≤1.6A. Press [A] to save. 2. Press PTT.Frequency changes tolow frequency. Adjust to 4.0 W, I≤1.6A. Press [A] to save. High 3. Press PTT again.Frequency changes tohigh frequency. Adjust to 4.0 W, I≤1.6A. Press [A] to save. 4.0W±0.3W 4.0W±0.3W 1. Turn to CH5. Press PTT. Center frequency. Adjust to 1.0 W, I≤0.7A. Press [A] to save. 2. Press PTT.Frequency changes to low frequency. Adjust to 1.0 W, I≤0.7A. Press [A] to save. 2. Power Low 3. Press PTT again.Frequency changes tohigh frequency. Radio Communication Test Set Ammeter ANT [B] (up) [C] (down)Adjust to 1.0 W, I≤0.7A. Press [A] to save. 1W±0.3W 1. Turn to CH6. Press PTT. The radio operateswith wideband. Center frequency. 2. Press PTT.Frequency changes to low frequency. 3. CDCSS balance Wideba-nd Narrow-band 3. Press PTT again.Frequency changes tohigh frequency. Radio Communication Test Set LPF: 15KHz ANT [B] (up) [C] (down) Rectify the waveform to square wave. Press [A] to save.
18 4. Press [A] for twoseconds. LED flashesindicating that theradio operates withnarrowband. Center frequency. Adjust narrowbandfollowing the abovesteps. Wideba-nd 1. Turn to CH7. Press PTT. The radio operateswith wideband. Center frequency. Adjust it to 4.0KHz±100Hz. Press [A] to save. 4. Maximu-m frequenc-y deviation Narrow-band 2. Press [A] for twoseconds. LED flashesindicating that theradio operates with narrowband. Center frequency. Radio Communication Test Set LPF: 15KHz AF: 1KHz 1V ANT MIC Jack [B] (up) [C] (down) Adjust it to 2.0KHz±100Hz. Press [A] to save. 5. MIC Sensitivity Turn to CH8. Press PTT. The radio operateswith wideband. Center frequency. Radio Communication Test Set LPF: 15KHz AF: 1KHz 24mVANT MIC Jack [B] (up) [C] (down)Check frequency deviation 2.9±0.1KHz. Press [A] to save. Adjust as wideband. 1. Turn to CH9. Press PTT. The radio operateswith wideband. Center frequency. 2. Press PTT.Frequency changes tolow frequency. Wideba-nd 3. Press PTT again,frequency changes tohigh frequency. Adjust deviationto 0.70KHz ±50Hz. Press [A] to save. 6. CTCSS deviation Narrow-band 4. Press [A] for twoseconds. LED flashesindicating that theradio operates withnarrowband. High frequency. Radio Communication Test Set LPF: 3KHz ANT [B] (up) [C] (down) Adjust deviation to 0.35KHz±50Hz. Press [A] to save.
195. Press PTT.Frequency changes tocenter frequency. 6. Press PTT.Frequency changes tolow frequency. Wideba-nd Turn to CH10. See CTCSS deviationadjustment. Adjust deviation to 0.70KHz±50Hz. Press [A] to save. 7. CDCSS deviation Narrowb-and See CTCSS deviationadjustment. Radio Communication Test Set LPF: 3KHz ANT [B] (up) [C] (down) Adjust deviation to 0.35KHz±50Hz. Press [A] to save. Wideba-nd Turn to CH11. See CTCSS deviationadjustment. Adjust deviation to 3KHz±0.1KHz. Press [A] to save. 8.FFSK deviation Narrow-band See CTCSS deviationadjustment. Radio Communication Test Set LPF: 3KHz ANT [B] (up) [C] (down) Adjust deviation to 1.45KHz±0.05KHz Press [A] to save. Wideba-nd Turn to CH12. See CTCSS deviationadjustment. Adjust it to 3KHz±0.1KHz. Press [A] to save. 9.TONE deviation Narrow-band See CTCSS deviationadjustment. Radio Communication Test Set LPF: 3KHz ANT [B] (up) [C] (down) Adjust it to 1.45KHz ±0.05KHz Press [A] to save. 10. Low battery alert level Turn to CH15. Adjustvoltage to 6.2V. Digital Voltmeter Press [A] to save. 11.VOX Sensitivity Turn to CH16. Radio Communication Test Set LPF:15KHz AF:1KHz 3mV ANT MIC Jack Press [A] to save.
20Receiver Measurement Adjustment Item Condition Test Instrument Terminal Part Method Specification/Remarks 1. Turn to CH13.Press PTT. Center frequency. 2. Press PTT.Frequency changes tolow frequency. Sensitivity 3. Press PTT.Frequency changes tohigh frequency. Scanner ANT T1 [B] (up) [C] (down) Adjust the waveform. Press [A] to save. 1. Turn to CH14.Press PTT. The radio operateswith wideband. Center frequency. 2. Press PTT. Frequency changes tolow frequency. Wideba-nd 3. Press PTT.Frequency changes tohigh frequency. Radio Communication Test Set SSG output: -118dBm MOD: 1KHz DEV: ±3KHz FILTER: 0.3-3.4KHz Adjust radio communication test set.SSG output: SINAD: 12dB Press [A] to save. 4. Press [A] for twoseconds. LED flashesindicating that theradio operates withnarrowband. High frequency. 5. Press PTT.Frequency changes tocenter frequency. Squelch Narrow-band 6. Press PTT.Frequency changes tolow frequency. Radio Communication Test Set SSG output: -118dBm MOD:1KHz DEV:±1.5KHz FILTER: 0.3-3.4KHz ANT Speaker Jack Adjust radio communication test set.SSG output: SINAD: 12dB Press [A] to save.
21Disassembly and Assembly for Repair Disassemble the radio 1. Turn off the radio. 2. Remove the battery: a. Press the release at top of the battery downwards. b. Separate top of the battery from the radio. c. Lift the battery off. (See fig.1) 电池推钮Fig. 1 3. Remove the antenna. 4. Remove the knob. (See fig.2) Fig. 2 5. Separate the chassis from PCB: a. Insert a screwdriver (Material No. 99050312) into the clearance between chassis and the case. b. Push the screwdriver downwards to separate the chassis from the case. c. Lift the bottom of the chassis and pull it out of the PCB. (See fig.3) Fig.3 Battery Latch
226. Remove the main PCB: a. Remove the two screw caps on top of the unit. b. Remove the five screws between PCB and the chassis. c. Loosen the weld between antenna pedestal and PCB using a soldering iron. d. Lift the PCB off. (See fig.4) Fig.4 7. Remove the small PCB: Loosen the screw to remove the small PCB. And then loosen the socket of flexible PCB. (See fig.5) Fig.5 8. Disassemble PTT key: Push the tab on PTT out of the hole on the case to disassemble PTT key. (See fig.6) Fig.6 Assemble the radio 1. Attach PTT: Align the tab on PTT with the corresponding hole on the case. (See fig.7)
23Fig.7 2. Assemble the small PCB: a. Insert the flexible PCB into the socket on the small PCB and lock it up. b. Insert the bottom of the small PCB into the underside of the two tabs under the case. c. Tighten the screws. (See fig.8) Fig.8 3. Assemble the chassis and PCB a. Insert the switch shaft in front of the PCB into the corresponding holes on the case. b. Press the bottom of the chassis downwards until a click is heard. (See fig.9) Fig.9 4. Attach the battery: a. Insert the two extensions at the bottom of the battery into the two slots on the case. b. Press the top of the battery toward the radio until a click is heard. (See fig.10) Fig.10 Slot
24Exploded View
25Packing Owner ' s ManualBelt ClipBatteryAdapt erChar gerGift BoxSt r apAnt ennaMai n Uni tPower Suppl y Cor d
26 Specification Item Specification Frequency Range 400~430MHz 440~470MHz 145~175MHz Channel Number 16 Channel Spacing 25KHz/12.5KHz Frequency Stability ±2.5ppm IF Frequency 44.85MHz/455KHz Antenna Impedance 50Ω Speaker Impedance 24Ω Operation Voltage 7.2V Operating Temperature -20~+50ºC Receiver Sensitivity 0.25uV (Wide)/0.35uV (Narrow) S/N 45 (Wide) /40dB (Narrow) Modulation Acceptance 2*7.5KHz/2*3.5KHz Adjacent Channel Selectivity 70dB (Wide) /60dB (Narrow) Co-channel Rejection -8dB (Wide) /-12dB (Narrow) Blocking 85dB Spurious Response 70dB Intermodulation Rejection 65dB Audio Response From 6 dB/oct. De-Emphasis. +2dB -6dB AF Power 500mW Audio Distortion 5% Transmitter Carrier Frequency Error ±2.5ppm Output Power 4W±0.5 (High)/1W±0.2 (Low) Modulation Limit 5K (Wide)/2.5K (Narrow) Adjacent Channel Power 70dB (Wide)/60dB (Narrow) Modulate Sensitivity 24±3mV Modulate Distortion 3% (Wide) /5% (Narrow) Audio Response From 6dB/oct. Pre-Emphasis ±3dB Residual Frequency Modulation 45dB (Wide) /40dB (Narrow) Conducted Spurious Emission -70dB/-36dBm Transmit Current 1.6A/0.7A

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