Service Manual

FCC ID: ARURPU416A

Users Manual

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FCCID_233592

CONTENTS General 2 Mode Combination 3 RPU416A Circuit Description 4 RPU416A Software Description 10 RPU416A Parts List 1 6 RPU416A Adjust Description 26 Disassembly for Repair 30 Exploded View 31 Packing 1

32 RPU416A PC Board View 33 RPU416A Block Diagram 37 RPU416A Level Diagram 39 RPU416A Schematic Diagram 41 Main Technical Specifications 49 2

General This manual is intended for use by experienced technicians familiar with similar types of commercial grade communications equipment. It contains main required service information and data for the equipment. The following precautions are recommended for personal 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. ! This equipment should be maintained by qualified technicians only. 3

Mode Combination 1. Mode User mode: Turn on the power to enter. PC mode"Set and adjust with PC software or programmer. 2. Parts description: (1) Antenna (2) Channel (frequency) selector knob Turn the knob to choose channel from 1~16(channel 16 may be set by distributor as scan channel). (3) LED light Lights red while transmitting, green while receiving a signal. Flashes red when the battery voltage is low while transmitting. (4) Power switch/Volume control Turn the knob clockwise to switch the transceiver ON, anti-clockwise to turn off the power till there is a “click” sound, rotate to adjust the volume level. (5) Speaker (6) Microphone (7) PTT switch (push to talk) Press the button while transmitting, and release it while receiving. (8) Monitor key Press it to shut off squelch, noise could be heard, release to connect squelch. (9) Speaker/microphone jack (10) Belt clip (11) Battery (TB-82) RPU416A Circuit Description 1. Frequency configuration The receiver utilizes double conversion. The first IF is 38.85MHz and the second IF is 450kHz. The first local oscillator signal is supplied from the PLL circuit. The PLL circuit in the transmitter generates the necessary frequencies. Fig.1 shows the frequencies. RPU416A frequency range: 450MHz—470MHz 4

ANT CF 450KHz MCF RF IF AF C ANTSW SP C AMP SYSTEM AMP 38.85MHz X3 multiply TCXO 12.8MHz B B RX PLL MIC PA TX VCO AMP MIC AMP AMP TX Fig.1 Frequency configuration 2. Receiver The receiver is double conversion superheterodyne. 1) Front-end RF amplifier An incoming signal from the antenna is applied to a Preamplifier (Q203) after passing through a transmit/receive switch circuit (K102 and D103 are off) and a 3-pole LC filter. After the signal is amplified (Q203), the signal is filtered by a band pass filter (a3-pole LC filter) to eliminate unwanted signals before it is passed to the first mixer. The voltages of these diodes are controlled by to track the MPU. (See Fig. 2-b) ANT CF200 D102 BPF RF AMP BPF MIXER MCF IF AMP AF PA AMP D103 L208-L211 Q203 L214.L203.L204 Q202 XF200 Q201 IC302 C IF.MIX AF AMP C IC200 LPF.HPF SP IC300 TUNE X3 APC TCXO multiply WIDE/NARROW SW Q1 Q303 IC403 B MCU 1st Local OSC B (PLL) Fig. 2 Receiver section configuration 2) First mixer The signal from the RF amplifier is heterodyned with the first local oscillator signal from the PLL frequency synthesizer circuit at the first mixer (Q202) to create a 38.85 MHz first intermediate frequency st (1 IF) signal. The first IF signal is then fed through two monolithic crystal filters (MCFs: XF200) to further remove spurious signals. 3) IF amplifier The first IF signal is amplified by Q201, and then enters IC 200 (FM processing IC). The signal is heterodyned again with a second local oscillator signal within IC200 to create a 450kHz second IF 5

RPU416A Circuit Description signal. The second IF signal is then fed through a 450kHz ceramic filter (CF200) to further eliminate unwanted signals before it is amplified and FM detected in IC200. 4) AF amplifier The recovered AF signal obtained from IC200 is amplified by IC300 (1/4), filtered by the IC300 low-pass filter (2/4) and IC300 high-pass filter (3/4) and (4/4), and de-emphasized by R303 and C306. The AF signal is then passed through a WIDE/NARROW switch (Q303). The processed AF signal passes through an AF volume control and is amplified to a sufficient level to drive a loud speaker by an AF power amplifier (IC302). 5) Squelch Part of the AF signal from the IC enters the FM IC again, and the noise component is amplified and rectified by a filter and an amplifier to produce a DC voltage corresponding to the noise level. The DC signal from the FM IC goes to the analog port of the microprocessor (IC403). IC403 determines whether to output sounds from the speaker, IC403 sends a high signal to the MUTE and AFCO lines and turns IC302 on through Q302, Q304, Q305, Q306 and Q307. (See Fig.3) FM IF IC200 IC 300 Q302 IC302 Q307 IF AMP DET AF AMP LPF HPF SW AF/PF AMP SW SP DET HPF AMP Q304.Q305.Q306 SW IC301 LPF 6 67 62 5 Q303 BUSY MUTE AFCO TI W/N SW IC403 MPU Fig. 3. AF Amplifier and squelch 6) Receiving signaling QT/DQT 300 Hz and higher audio frequencies of the output signal from IF IC are cut by a low-pass filter (IC301). The resulting signal enters the microprocessor (IC403). IC403 determines whether the QT or DQT matches the preset value, and controls the MUTE and AFCO and the speaker output sounds according to the squelch results. 3. PLL frequency synthesizer The PLL circuit generates the first local oscillator signal for reception and the RF signal for transmission. 1) PLL The frequency step of the PLL circuit is 5 or 6.25kHz. A 12.8MHz reference oscillator signal is divided at IC1 by a fixed counter to produce the 5 or 6.25kHz reference frequency. The voltage controlled oscillator (VCO) output signal is buffer amplified by Q6, then divided in IC1 by a dual-module RPU416A Circuit Description programmable counter. The divided signal is compared in phase with the 5 or 6.25kHz reference signal in the phase comparator in IC1. The output signal from the phase comparator is filtered through a low-pass filter and passed to the VCO to control the oscillator frequency. (See Fig. 4 of Next Page) 6

D D PLL IC IC1 Q4 D2.4 TX VCO Q2 5KHz/6.25KHz I/N RF AMP LPF Q6 BUFF AMP PLL DATA PHASE CHARGE C COMPARATOR PUMP Q3 C D1.3 RX VCO REF OSC I/M 5KHz/6.25KHz Q5.7 T/R SW B B 12.8MHz Fig. 4. PLL circuit 2) VCO The operating frequency is generated by Q4 in transmit mode and Q3 in receive mode. The oscillator frequency is controlled by applying the VCO control voltage, obtained from the phase comparator, to the varactor diodes (D2 and D4 in transmit mode and D1 and D3 in receive mode) . The T/R pin is set high in receive mode causing Q5 and Q7 to turn Q4 off, and turn Q3 on. The T/R pin is set low in transmit mode. The outputs from Q3 and Q4 are amplified by Q6 and sent to the buffer amplifiers. 3) UNLOCK DETECTOR If a pulse signal appears at the LD pin of IC1, an unlock condition occurs, and the DC voltage obtained from D7, R6, and C1 causes the voltage applied to the UL pin of the microprocessor to go low. When the microprocessor detects this condition, the transmitter is disabled, ignoring the push-to-talk switch input signal. (See Fig. 5) 5C R6 IC1 IC403 D7 LD UL C1 PLL IC MPU Fig. 5. Unlock detector circuit 4. Transmitter 1) Transmit audio The modulation signal from the microphone is amplified by IC500 (1/2), passes through a preemphasis circuit, and amplified by the other IC500 (1/2) to perform IDC operation. The signal then passes through a low-pass filter (splatter filter) (Q501 and Q502) and cuts 3kHz and higher frequencies. 7

RPU416A Circuit Description The resulting signal goes to the VCO through the VCO modulation terminal for direct FM modulation. (See Fig. 6) 2) QT/DQT encoder A necessary signal for QT/DQT encoding is generated by IC403 and FM-modulated to the PLL reference signal. Since the reference OSC does not modulate the loop characteristic frequency or higher, modulation is performed at the VCO side by adjusting the balance. (See Fig. 6) IC500(1/2) Q501.502 VR501 MIC IC500(1/2) LPF MAX AMP PREEMPHASIS IDC (SPLATTER FILTER) DEV D5.Q4 MIC VCO Q503 VR500 SW BALANCE IC403 X1.IC1 QT/DQT REFERENCE TO OSC MUTE Fig. 6. Transmit audio QT/DQT 3) RF amplifier The transmit signal obtained from the VCO buffer amplifier Q100, is amplified by Q101 and Q102. This amplified signal is passed to the power amplifier, Q105 and Q107, which consists of a 2-stage FET amplifier and is capable of producing up to 4W of RF power (See Fig. 7-b) ANT AMP DRIVE AMP FINAL AMP ANT SW D Q101.102 Q105 Q107 D101 LPF 5T C APC Q109 DET SW Q103.Q104 IC100 B SW B ANT SW B 5T Q106 SW D102.103 APC Q108 RX TH102 SW 5T 5T A SW Title Q110 Size Number Revision Fig. 7 APC system 4) ANT switch and LPF The RF amplifier output signal is passed through a low-pass filter network and a transmit/receive 8

RPU416A Circuit Description switching circuit before it is passed to the antenna terminal. The transmit/receive switching circuit is comprised of D101, D102 and D103. D102 and D103 turned on (conductive ) in transmit mode and off (isolated) in receive mode. 5) APC The automatic power control (APC) circuit stabilizes the transmitter output power at a predetermined level by sensing the drain current of the final amplifier Field Effect Transistor (FET). The voltage obtained from the above drain current with a reference voltage which is set using the microprocessor. An APC voltage proportional to the difference between the sensed voltage and the reference voltage appears at the output of IC100 (1/2). This output voltage controls the gate of the FET power amplifier, which keeps the transmitter output power can be varied by the microprocessor which in turn changes the reference voltage and hence , the output power. 6) Terminal protection circuit When the thermistor (TH102) reaches about 80", the protection circuit turns on Q110 to protect transmitting final amplifier (Q107). 5. Power supply A 5V reference power supply [5M] for the control circuit is derived from an internal battery. This reference is used to provide a 5V supply in transmit mode [5T] ,a 5V supply in receive mode [5R] , and a 5V, supply common in both modes [5C] based on the control signal sent from the microprocessor. 6. Control system The IC403 CPU operates at 7.37MHZ. This oscillator has a circuit that shifts the frequency according to the EEPROM data. 9

RPU416A Software Specifications .Specifications: 1. Use mechanical knob to choose from 16 channels. Frequency range: UHF: 450~470MHz 2. Monitor 3. Auto power saving 4. Audio alarm 5. Auto squelch control (0~9 level) 6. Timing 7. Channel space 25kHz/12.5kHz(Wide/Narrow) 8. CTCSS & DQT encode 9. CTCSS & DQT decode 10.Two Tone Signal decode 11.Two Tone Signal encode 12.Busy channel lock 13.Clock frequency deviation 14.Scan 15.PC mode 16.PC modifying mode 17.Wire clone 18.Manual modifying mode .Description: 1. User mode: general radio mode 2. PC mode: Make settings through external programmer or PC program software: (1) Receive frequency & Transmit frequency (2) Receive signaling & Transmit signaling (3) Lock busy channel (4) Clock frequency deviation (5) Timing (6) Squelch level selectivity (7) Power saving (8) Audio Alarm (9) Channel space 25kHz/12.5kHz(Wide/Narrow) (10) Monitor mode (11) Scan mode (12) Reset scan mode (13) Scan priority 3. PC modify mode: Make settings through external programmer or PC program software: RPU416A Software Specifications (1) Frequency stability (2) RF power (3) Low power alarm (4) Squelch (level 9&3) (5) CTCSS deviation (Wide/Narrow). (6) DQT deviation (Wide/Narrow). (7) Receive sensitivity(low"medium"high) 4. Wire Clone: Press MONI to turn on the power , enter wire clone mode 2 seconds later, press PTT, Begin cloning while red lights, finish while light goes out. 5. Mode setting: (1) Short cut the SELF on PCB, and turn on the power till “BEEP”. (2) Set channel selector knob to corresponding place according to the model(1-16) 10

(3) Press [MONI],then press [PTT], to set the channel, channel data and initial data. (4) Turn off the power, disconnect SELF on PCB to end mode settings. (5) Remarks: The old data(frequency, CTCSS/DQT, channel function) will be deleted once set the new mode by pressing MONI AND PTT , part of the function also would be changed. Therefore, do not set this operation unless change the EEPROM, etc. 11


RPU416A Software Specifications (6) TC- 368(2) channel frequency diagram (after setting): Initial 1CH 2CH(Central) 3CH(L) 4CH(H) No Model Frequency(MHz) IF(MHz) (MHz) Tx(MHz) Rx(MHz) Tx(MHz) Rx(MHz) Tx(MHz) Rx(MHz) Tx(MHz) Rx(MHz) 1 136.000~149.995 140.000 +38.85 143.100 143.100 143.000 143.100 136.000 136.100 149.975 149.900 2 150.000~173.995 150.000 +38.85 162.100 162.100 162.000 162.100 150.000 150.100 173.975 173.900 3 400.000~419.995 410.000 -38.85 410.100 410.100 410.000 410.100 400.000 400.100 419.975 419.900 4 RPU416A 450.000~469.995 450.000 -38.85 460.100 460.100 460.000 460.100 450.000 450.100 469.975 469.900 5 350.000~369.995 360.000 -38.85 360.100 360.100 360.000 360.100 350.000 350.100 369.975 369.900 6 370.000~389.995 380.000 -38.85 380.100 380.100 380.000 380.100 370.000 370.100 389.975 389.900 7 220.000~239.995 230.000 -38.85 230.100 230.100 230.000 230.100 220.000 220.100 239.975 239.900 8 240.000~259.995 250.000 -38.85 250.100 250.100 250.000 250.100 240.000 240.100 259.975 259.900 9 406.000~429.995 410.000 -38.85 418.100 418.100 418.000 418.100 406.000 406.100 429.975 429.900 10 144.000~147.995 145.000 +38.85 146.100 146.100 146.000 146.100 144.000 144.100 147.975 147.900 11 336.000~367.995 350.000 -38.85 352.100 352.100 352.000 352.100 336.000 336.100 367.975 367.900 12 268.000~395.995 380.000 -38.85 382.100 382.100 382.000 382.100 268.000 268.100 395.975 395.900 13 430.000~439.995 430.000 -38.85 435.100 435.100 435.000 435.100 430.000 430.100 439.975 439.900 14 438.000~449.995 440.000 -38.85 444.100 444.100 444.000 444.100 438.000 438.100 449.975 449.900 15 465.000~494.995 480.000 -38.85 480.100 480.100 480.000 480.100 465.000 465.100 494.975 494.900 16 490.000~519.995 500.000 -38.85 505.100 505.100 505.000 505.100 490.000 490.100 519.975 519.900 RPU416A Initialization data of channel are in the above diagram CH1-CH4, the modify frequency is reset to initial data. Frequency of CH5~CH14 are the same with CH1. The signaling of CH5 and CH10 is 67.0Hz; the signaling of CH6 and CH11 is 151.4Hz; the signaling of CH7, CH12 is 250.3Hz; the signaling of CH8 and CH13 is 423(DQT); the signaling of CH9 and CH14 is -423(DQT). CH1~CH9 are Wide, CH10~CH14 are Narrow. 13

RPU416A Software Specifications 6. Manual Adjust Mode: Press PTT and MONI simultaneously to turn on the power"enter manual Adjust mode out 3 seconds later. Choose the settings by turning the channel selector knob 1-12CH, use PTT (upward) or MONI (downward) to adjust (Notice: MIC shouldn’t be connected with external cable while modifying),1~12CH are defined as follows: (1) Frequency stability (2) RF power (3) Low power alarm (4) Receiver sensitivity (center frequency adjust) (5) Receiver sensitivity (low frequency adjust) (6) Receiver sensitivity (high frequency adjust) (7) Squelch (level 9) (8) Squelch (level 3) (9) CTCSS deviation (Wide) (10) CTCSS deviation (Narrow) (11) DQT deviation (Wide) (12) DQT deviation (Narrow) 13~16CH are used for adjusting transmitter and receiver. Press PTT to transmit; Press MONI to choose: Wide/Narrow, one Beep sound is Narrow, two Beep sound is Wide. 13~16CH are defined as follows: (13) center frequency (discrepancy of transmission and receive frequency is 0.1MHz). (14) Lowest frequency (discrepancy of transmission and receive frequency is 0.1MHz). (15) Highest frequency (discrepancy of transmission and receive frequency is -0.075MHz). (16) center frequency: sends 250.3Hz CTCSS signals (discrepancy of transmission and receive frequency is 0.1MHz). Note: To enter and shut off manual adjust mode by short cut the SELF. Turn on the power, and enter settings mode, the manual function is automatically on. Press [PTT] to disable manual modify. Once this function is disabled, this mode is not accessible, kindly suggest disable this mode after adjust. . CPU: CPU control M38034M4 Pin No. Port I/O Function name 1 TI I Input QT/DQT signal 2 BUSY I Input busy signal 3 BATT I Detect battery voltage 4 NC I NC 5 TO O Output QT/DQT 6 BEEP O Beep output 7 NC I NC 8 ENC0 I Input encode 9 ENC1 I Input encode 10 ENC2 I Input encode 11 ENC3 I Input encode 12 NC I NC 13 PTT I [PTT] input ,connect RXD 14 TXD O RS-232C output RPU416A Software Specifications 15 RXD I RS-232C input x16 MONI I [MONI] input 17 SELF I Program L: set up mode 18 CNVSS I Connect VSS 19 RST I Reset 20 INT0 I Power detection 21 NC I NC 22 XIN I Oscillator(7.3728MHz) 14

23 XOUT O Oscillator 24 VSS I Grounding 25 SHIFT O Clock frequency deviation H: unlock 26 PABC O MOS FET power H: unlock 27 WNRC O Audio referential sensitivity L: narrow 28 WNTC O Max deviation H: narrow 29 NC I NC 30 SDA I/O EEPROM data cable 31 SCL O EEPROM clock cable 32 UL I Lock circuit detector L: unlock 33 DT O Common data output 34 CK O Common clock output 35 LE O PLL IC H: lock up 36 5MC O Power control except CPU and EEPROM L: unlock 37 AFCO O AF amplifier H: unlock 38 RX O TX/RX VCO H: receive 39 GLED O Green light control H: light 40 RLED O Red light control H: light 41 SAVE O Power saving control H: power saving OFF 42 MUTE O Squelch control H: mic squelch L:AF squelch 43 5RC O Receiver power control L: unlock 44 5TC O Transmitter power control H: unlock 45 NC I NC 46 NC I NC 47 NC I NC 48 NC I NC 49 NC I NC 50 NC I NC 51 NC I NC 52 NC I NC 53 NC I NC 54 NC I NC 55 VCCN O Frequency output 56 APC O TX:auto frequency output RX:BPF tune output 57 VCC I CPU input power 5V 58 VREF I Connect with VCC 59 AVSS I Connect with VSS 60 NC I NC 61 NC I NC 62 NC I NC 63 NC I NC 64 TIBI I QT/DQT exterior circuit central point input 15

RPU416A Adjust Description Use programmer or PC software to program RPU416A, or by manual program, refer to”RPU416A software description ” for the manual program and mode settings. . Instrument: 1. Synthesized test instrument 1 set 2. Scanner 1 set 3. 3A/10V power 1 set 4. Digital Voltmeter 1 set 5. 3A DC Ammeter 1 set . Adjust: 1. Initialization" It is necessary to initialize the transceiver because there is useless data in EEPROM. Short cut the SELF on PCB, turn on the power till there comes the sound ”BEEP”, place the channel selector knob, press [MONI], then press [PTT], to begin initializing the channel and other data. Please refer to the outcome of initialization at”RPU416A software description”. 2.Adjustment: The adjustment of RPU416A, some are conducted in normal mode, some are in manual program mode. Turn on the power and enter the normal mode., at the same time, press the PTT and MONI to turn on the transceiver"enter the manual program mode 3seconds later.(refer to”RPU416A software description” manual program mode). VCO SECTION: measurement Adjustment Specifications/ ITEM CONDITION Test equip terminal part Method Remarks 1.Setting 1.power 7.5V 2.Transmit 1.CH: TX HIGH 3.7V±0.1V VCO lock voltage 2.CH: TX LOW Digital check RPU416A >1V CV TC1 3.Receive Voltmeter 1.CH: RX HIGH 3.7V±0.1V VCO lock RPU416A>1V voltage 2.CH: RX LOW check Note: If unlock VCO, check adjustment is enabled in manual mode.(signal could be transmitted regardless of the lock of VCO in manual mode). 16

RPU416A Adjust Description Adjust the receiver section: (enter manual mode) Measurement Adjustment Specifications Item Condition Test equip Terminal parts Method /Remarks Adjust the undee to the top, 1:CH:RX center the bandwidth is about TC202 turn to channel 4 in 10MHz, the sign of central TC203 manual mode frequency is in the middle of the undee Adjust the undee to the top to 4.Band- 2. CH: RX LOW PTT(up) Spectrum receive pass turn to channel 5 in ANT . TP2 MONI analyzer Low frequency , the sign is on filter manual mode (down) the left of the top of the undee Adjust the undee to the top to 3.CH:RX HIGH PTT(up) receive turn to channel 6 in MONI High frequency , the sign is on manual mode (down) the right of the top of the undee 1. CH:RX center Turn to channel 13 in manual mode Dev : Wide Synthetical test 2. CH: RX center SSG output : 5.Sensitivity Turn to channel 14 in -118dBm ANT SINAD: 12dB check (Wide) manual mode MOD:1kHz SP or higher Dev : Wide DEV:±3kHz FILER: 0.3- 3.4kHz 3. CH: RX center Turn to channel 15 in manual mode Dev : Wide 1. CH: RX center Turn to channel 13 in manual mode Dev : narrow Synthetical test 2. CH: RX center SSG output : 6.Sensitivity Turn to channel 14 in -116dBm ANT SINAD: 12dB check (Narrow) manual mode MOD:1kHz SP or higher Dev : narrow DEV:±1.5kH z FILER: 0.3-3.4kHz 3. CH: RX center Turn to channel 15 in manual mode dev : narrow Synthetical 1.CH: RX center test SSG Level 9 The squelch Turn to channel 7 in output : - Adjust to close the squelch. must be closed manual mode PTT(up) 117dBm ANT 7.Squelch MONI Synthetical SP 2.CH:RX center (down) test SSG Level 3 The squelch Turn to channel 8 in output : - Adjust to close the squelch. must be closed manual mode 125dBm 17

RPU416A Adjust Description Adjust the transmitter section: Measurement Adjustment Specifications Item Condition Test equip Terminal Parts Method /Remarks CH: TX center 8.Transmit Turn to channel 1 in Synthetical PTT(up)M ANT Adjust it to center frequency Error<150Hz frequency test ONI(down) manual mode 1.CH:TX center Adjust it to: PTT(up)M Turn to channel 2 in 3.7<Po<4.7W ONI(down) manual mode I<1.6A 2.CH: TX LOW Synthetical Adjust it to: 9.Power Turn to channel 3 test ANT 3.7<Po<4.7 W Press PTT Ammeter I<1.6A 3.CH:TX HIGH Adjust it to: Turn to channel 4 3.7<Po<4.7W Press PTT I<1.6A 1.CH: TX center, turn to channel 13 in manual mode, VR501 Adjust it to:4.2kHz±100Hz Wide dev: wide Synthetical Press PTT test LPF: 10.MAX ANT 15kHz DEV MIC 2.CH: TX center, AF:1kHz turn to channel 13 120mV in manual mode, Check:1.8kHz-2.2kHz Narrow dev: narrow Press PTT 1.CH: TX center, turn to channel 13 in manual mode, VR501 Check:2.2kHz-3.6kHz Wide dev: wide Synthetical Press PTT test 11.MIC FILER: ANT SENS 0.3-3.4kHz MIC 2.CH: TX center, AF:1kHz turn to channel 13 12mV in manual mode, Check:1.1kHz-1.8kHz Narrow dev: narrow Press PTT 1.CH: TX center, 67.0Hz turn to channel 9 in CTCSS manual mode Adjust VR500,the test value of Synthetical on condition 1 & condition 2 is 12.DQT/QT test LPF: ANT VR500 2.CH: TX center, consistent, the difference 300Hz turn to channel 16 value<20Hz 250.3Hz in manual mode, CTCSS press PTT 1.CH: TX center, Synthetical PTT"up"M 13.QT DEV turn to channel 9 in test ANT ONI"down Adjust it to:0.75kHz±50Hz Wide manual mode LPF:300Hz " 18

RPU416A Adjust Description 2.CH: TX center, turn to channel 10 Adjust it to:0.35kHz±50Hz Narrow in manual mode 1.CH: TX center, Synthetical PTT"up"M turn to channel 11 test ANT ONI"down Adjust it to:0.75kHz±50Hz Wide in manual mode LPF:300H " 14.DQT DEV 2.CH:TX center, turn to channel 12 Adjust it to:0.35kHz±50Hz Narrow in manual mode Turn to channel 3 PTT"up"M 15.Low in manual mode, Digital " ONI"down Adjust so that the LED flashes " Battery level Adjust the battery voltmeter " to 5.8V Note: In manual mode , channel selector 1-12, MIC can’t connect line, after adjust complete, short SELF, enter mode setting press PTT, disable manual adjust. 19

Disassembly for Repair Separating the case assembly from the chassis 1. Remove the two knobs # and three round nuts $. 2. Remove the two screws %. 3. Expand the right and left sides of the bottom of the case assembly"lift the chassis, and remove it from the case assembly. 4. Taking care not to cut the speaker lead, open the chassis and case assembly. Removing the lever Raise the lever on the lower case, insert a small flat screwdriver into the space between the case and lever , open the case carefully and lift the lever off . Note: Do not force to separate the case from the lever. 20



RPU416A Level Diagram Rx Section SG output level for obtaining 12Db/SINAD when injected to each point Modulate the AF level with a frequency of 1kHz and deviation of 1.5kHz -116.5dBm -113dBm -98dBm -103dBm -104dBm -106.5dBm -103dBm 1018mVrms 175mVrms 23.5mVrms 0.63Vrms 5R L112 L208 IC200 ANT R224 IC300 IC302 SP Q203 R211 Q307 XF200 Q202 R217 Q201 C212 C145 L203, L214 VR R210 1st Local RF center 0.1Vrms IF 38.85MHz AF 1kHz through a 470pF coupling capacitor. (Narrow), 3kHz(Wide) . Then take the signal form the signal generator st Measure the 1 Local level on a RF VTVM. when the AF output has been adjusted to 0.63Vrms with the AF vol. Tx Section Measure the audio frequency on an AFVTVM and radio frequency on a RF VTVM at high impedance . Set the MIC input to obtain a modulation factor of 60% 16mVrms 430mVrms 310mVrms 0.15Vrms 0.44Vrms 0.8Vrms 0.62Vrms 4W IC500 Q101 Q102 Q107 MIC Q4 Q100 Q105 ANT C40 Q6 C100 C106 C108 C114 VR501 D5 AF VTVM RF VTVM with the transmit frequency at center and a modulation frequency of 1kHz .

Main Technical Specifications Frequency range 450 MHz ~470 MHz Channel 16 Channel space 25kHz / 12.5kHz Antenna impedance 50 Transmitter 2K& impedance Input voltage 7.2V DC -6 Frequency stability ±2.5×10 Transmitter -6 Frequency stability ±2.5×10 Output power 4.0±0.5W Operating sensitivity 12±3mV Audio distortion 5% Modulation limiting 5kHz / 2.5kHz Bandwidth 16 kHz/8kHz Modulate specialty '3dB Spurious RF 7.5(W Adjacent power -65 d B / -55dB Receiver Reference sensitivity Precede 0.28(V / 0.35(V Squelch turnon 0.4(V sensitivity Audio frequency 500mW Audio deviation 7% Operating bandwidth "±7 kHz"/"±3.5 kHz" Audio response +2dB -8dB Channel restrain -8 d B Obstruct 85d B Selectivity 65 d B / 60dB Spurious response 60 d B Intermodulation 60 d B 24


Document Created: 2002-03-27 10:42:46
Document Modified: 2002-03-27 10:42:46
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