Alinco_DR-430_serv.pdf
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1、DR-430E/T/TE1-5 Service Manual CONTENTS SPECIFICATlONSPARTS LIST 1) General 2RF Unit22-25 2) Transmitter2CPU Unit26-27 3) Receiver2VCO Unit28 CIRCUIT DESCRIPTIONSP Unit28 1) Receiver System3Mechanical Parts29 2) Transmitter System4Packing29 3) PLL Circuit4EMS-5A30 4) Terminal Function of Microproces
2、sor5-6EMS-1130 5) Terminal Connection of.Microprocessor 8EJ19u31 SEMICONDUCTOR DATAEJ20u31 1) AK23419ADJUSTMENT 2) AN78LO5M101 ) Required Test Equipmen32 3) AN8010M102) Adjustment Points32 4) BU4052BF103) Adjustment for DR430T 33 5) LR408721114) Adjustment for DR430E 34 6) M5218FP115) Adjustment for
3、 DR430TE35 7) M56760FP126) Adjustment for DR430TE36 8) MC7808CT137) Adjustment for DR430TE36-1 9) RH5VA32AA-T1138) Adjustment for DR430TE36-2 10) RH5VA45AA-T1139) Adjustment for DR430TE36-3 11) M57788L, M, H14PC BOARD VIEW 12) TK10487MTR151) CPU Unit Side A37 13) X24CO2S8-30152) CPU Unit Side B37 14
4、) uPC1241H153) RF Unit Side A38 15) Transistor, Diode and LED Outline Draw164) RF Unit Side B39 16) LCD Connection175) VCO Unit Side A40 EXPLODED VIEW6) VCO Unit Side B40 1) Bottom View18CIRCUIT DIAGRAM 2) Top, Front View 1191) RF Unit41 3) Top, Front View 2202) CPU Unit42 3) EMS-543 4) EMS-1143 BLO
5、CK DIAGRAM44 NOTICE: When ordering replacement parts, make sure to include the following fourpoints: (1) Parts No. (2) Description (3) Equipment model name (4) Quantity required ALINCO INCORPORATED TWIN 21 M.I.D. TOWER BUILDING 23F, 1-61, 2-CHOME, SHIROMI CHUO-KU , OSAKA, 540-8580 JAPAN Tel (81)6-69
6、46-8150 fax (81)6-6946-8175 e-mail: exportalinco.co.jp SPECIFICATIONS 1) General Frequency Coverage: RX: 430.000 460.000MHz(T version) TX: 440.000 450.000MHz(T version) TX/RX: 430.000 440.000MHz(E version) RX: 400.000 425.000MHz(TE1 version) TX: 400.000 420.000MHz(TE1 version) RX: 445.000 475.000MHz
7、(TE2 version) TX: 450.000 470.000MHz(TE2 version) TX/RX: 430.000 450.000MHz(TE3 version) TX/RX: 470.000 490.000MHz(TE4 version) TX/RX: 490.000 510.000MHz(TE5 version) Frequency Resolution:5, 10, 12.5, 15,20,25kHzsteps Antenna Impedance:50 ohm unbalanced Power Supply Requirements: DC 13.8 +/-10% Volt
8、s DC Current Drain at l3.8V Receiving: Squelched less than 800mA Transmitting: High/10.0A (approx.) Low/3.5A (approx.) Dimensions:140mm(W) x 40mm(H) x 154mm(D) Weight:0.86kg (approx.) 2) Transmitter Output Power:High: 35Watts Low: 5Watts (Approx.) Emission Mode:F3E(FM) Modulation System:Variable Rea
9、ctance Frequency Modulation Max. Frequency Deviation: +/ -5kHz (Wide Version) +/ -2.5kHz (Narrow Version) Spurious Emission:-60dB or below carrier Microphone:Electret Condenser Microphone Operating Mode:Simplex/Semi-Duplex Offset :0ffset from 0 to 15.995MHz 3) Receiver Receiving System:Superheterody
10、ne Dual Conversion Intermediate Frequency:1stIF: 30.85MHz 2nd lF: 455kHz 12dB SINAD less than -16dBu Sensitivity:More than +/-6kHz at -6dB (Wide Version) Selectivity:Less than +/-15kHz at -60dB (Wide Version) Audio Power Output:More than 2.5W 10% Distortion Speaker Impedance:8 ohm Page-2 CIRCUIT DES
11、CRIPTION 1 ) Receiver System 1. Front EndThe signal from the antenna is passed through a low-pass filter and input to the L16. The signal from L16 is led to the gate of Q1. D4 and D17 are the diode limiter circuit against the excessive input power of more than 20dBm. Q1 is the FET which.has two gate
12、s. The voltage of the gate 2 is set higher to get the high gain and sensitivity. The signal from Q1 is led to the band pass filter L5, and gets the high image rejection ratio. The signal is amplified by Q18, and led to the band pass filter L3. 2. Mixer CircuitThe signal from the band pass filter L3
13、is converted into the first IF signal of 30.85MHz. The receiving signal is led to the gate 1 of Q2, and the first local oscillator signal is led to the gate 2 of Q2. To reduce the high adjacent channel interference, the band width of the FL2 is set to 20kHz. The signal from FL2 is amplified by Q8, a
14、nd input to FM IF system IC3 of TK10487. 3. lF CircuitThe TK10487 has the second local oscillator circuit, mixer circuit, detector circuit, squelch circuit, and so on. Pin1 and 2 are the terminals of the crystal oscillator circuit. Pin2 (emitter) is connected to the ground via the resister R108 to p
15、revent the oscillator from decreasing the power at the low tempera- ture. Pin4 of IC3 is connected to FL1 directly because the matching resistor for ceramic filter is built-in. The quadrature circuit (pin10 of IC3) is con- nected to the ceramic resonator X2 for the temperature stability and good qua
16、lity. The signal from pin11 of IC3 is connected to the LPF. The detected AF signal, which has flat frequency characteristics, is led to the control unit and used as both squelch signal and tone squelch signal. De-emphasis circuit consists of R22, R23, C30 and C31. The LPF amplifier consisting of Q5
17、and Q6 is located far away from the VR in the control unit, so it outputs the high voltage signal to prevent S/N from the deterioration. The squelch switch circuit consists of Q4 and Q16, and switches on/off at the point where there is no voltage to prevent from the switching noise. The S meter sign
18、al from pin12 of IC3 is led to the CPU in the control unit after adjusting the level at D16 and VR3. The S meter signal is thermal compensated by TH1 and stabilized. The noise amplifier consists of pin13 and 14, the built-in OP amplifier in IC3. The output signal of noise amplifier is amplified by Q
19、14, rectified by D10, and then led to the pin15 (hysteresis comparator input) of IC3. 4. AF CircuitIC4 is about 5W audio power amplifier IC. When the capacity of pin1 in C82 is increased more, the output incidental noise becomes smaller. The high- pitched tone becomes smaller at the same time. This
20、radios capacity of C82 is determined considering the high-pitched tone. PAGE-3 2) Transmitter System 1. Modulation CircuThe microphone amplifier IC1 (IDC, LPF) consists of two operational amplifi- ers. The signal from the microphone is led to pre-emphasis circuit consisting of C129 and R34 and then
21、to the limiter circuit. The limiter circuit uses the saturation of the OP amplifier. The amplified signal is input to the low-pass filter IC1A. The output signal from the microphone amplifier is passed through variable resistors VR2 for modulation adjustment and input to the VCO unit. Sub tone devia
22、tion is determined by R18, R74 and VR2. The radio does not have the adjustment variable resistor for sub tone deviation. 2. TX Amp. Circuit The signal from VCO is amplified by TX, RX wide band LO amplifier Q19. The signal from Q19 is passed through the transmission/reception selector, and amplified
23、by Q27, Q20 and Q15. The PA unit is driven at 400mW driving power. 3. PA CircuitIC5 is 35W powered amplifier module. The output power is controlled by the voltage of V1. The RF signal amplified 35W in PA is passed through D5 and two-stage transmission/reception low-pass filter, and input to the ante
24、nna connector. 4. ALC CircuitThe power detection circuit consisting of D11 and D12 rectifies the output signal voltage. The detected DC voltage is led to the VR1 (power adjust trimmer), and amplified by Q3, Q9 and Q13. Output power is controlled by voltage of V1 in IC5 and collector voltage of Q15.
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