Galaxy DX 959 Service Manual Download Page 1 | Manualshive

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Summary of Contents for DX 959

Page 1: ......

Page 2: ...ation 8 CHAPTER 3 CIRCUIT DESCRIPTION 3 0 Introduction 11 3 1 PLL Circuit 11 3 2 Receiver Circuit 11 3 3 Transmitter Modulation Circuit 11 3 4 Transmitter Amplifier Circuit 11 CHAPTER 4 ALIGNMENT 4 0...

Page 3: ...Carrier Suppression 55 dB Audio Frequency Response 300 to 2500 Hz Antenna Impedance 50 Ohms Output Indicators Meter shows relative RF output power SWR and AM Modulation Transmit LED glows red when tra...

Page 4: ...ter clockwise then slowly clockwise until the receiver noise disappears Any signal to be received must now be slightly stronger than the average received noise Further clockwise rotation will increase...

Page 5: ...tuning of the receive frequency above or below the channel frequency by up to 1 0 KHz Although this control is intended primarily to tune in SSB signals it may be used to optimize AM signals 11 SWR M...

Page 6: ...ive only In LO position bass is increased and in HI position treble is increased 16 CHANNEL DISPLAY The channel display indicates the current selected channel 17 SWR ALERT LED This LED lights red when...

Page 7: ...lack and red wire The black goes to negative and the red goes to positive 3 PA SP This jack is for PA operation Before operating you must first connect a PA speaker 8 ohms 4W to this jack 4 EXT SP Thi...

Page 8: ...085 MHz 31 27 315 MHz 12 27 105 MHz 32 27 325 MHz 13 27 115 MHz 33 27 335 MHz 14 27 125 MHz 34 27 345 MHz 15 27 135 MHz 35 27 355 MHz 16 27 155 MHz 36 27 365 MHz 17 27 165 MHz 37 27 375 MHz 18 27 175...

Page 9: ...eceived Do not advance the control too far or some of weaker signals will not be heard 6 Set the CHANNEL selector switch to the desired channel 7 Set the RF gain control fully clockwise for maximum re...

Page 10: ...ing jacket of the microphone cable ii All leads should be cut to the same length Strip the ends of each wire 1 8 and tin the exposed wire Before beginning the actual wiring read carefully the circuit...

Page 11: ...e pushed back onto the microphone cable before starting to solder If the washer is not captive to the pin receptacle body make sure that it is placed on the threaded portion of the pin receptacle body...

Page 12: ...end pre amp consisting of Q17 The RF signal is fed into the mixer circuit of the Q18 and then into the AM IF section of the receiver depending on the mode of operation The signal is then detected by...

Page 13: ...12 DX 959 BLOCK DIAGRAM...

Page 14: ...13 DX 959 CIRCUIT DIAGRAM...

Page 15: ...ct the short PCB from TP7 TP8 and TP9 Set radio to CH 1 AM RX mode Clarifier setting in 12 o clock Connect Oscilloscope to TP3 Set radio to CH 1 AM RX mode Connect frequency counter IC3 Pin 8 L14 L15...

Page 16: ...signal 30mV 1KHz to microphone VR13 11 5 W SSB Carrier Balance Mic Gain off CH19 USB TX mode Connect scope to antenna connector VR6 Spurious Emission to minimum SSB APC Set radio to CH 19 USB mode MOD...

Page 17: ...to CH 19 LSB mode VOL control fully clockwise RF SG setting 27 184 MHz 0 5 uV MOD to off L11 L12 Audio output 2V S N 10 dB NB Adjust Set radio to CH 19 AM mode RF SG setting 27 205 MHz MOD 30 100 uV...

Page 18: ...17 Figure 4 1 Transmitter test setup Figure 4 2 Receiver test setup...

Page 19: ...18 Figure 4 3 Main PCB Adjustment Location CHAPTER 5...

Page 20: ...without periodic inspection and maintenance Important points to be checked regularly are as follows Check Item Action Whip antenna option If cracked or broken replace it Coaxial cable If sheath is cra...

Page 21: ...in the parts list The reference designators are in alphanumeric order PART LIST DX 959 VR P C B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT095950Z VR P C B 2 J1 J2 EX07N48223 PCB C S 2P...

Page 22: ...RCY012224Z 2 2K ohm 0 1W 8 R12 RCY014724Z 4 7K ohm 0 1W 9 R7 RCY011034Z 10K ohm 0 1W 10 C5 RCY012234Z 22K ohm 0 1W 11 C7 CK1059AB1A 0 5PF 50V 12 C6 CK1030AB1A 3PF 50V 13 C3 C4 CK2104AB7R 0 1 F 50V 14...

Page 23: ...22...

Page 24: ...48223 PCB C S 2P 3 J8 EX07N48209 PCB C S 10P 4 J1 J2 EX07N48928 PCB C S 12P 5 J3 EX07N48222 PCB C S 5P 6 S201 EWRT32000S ROTARY SW 7 R202 R204 R217 RCY011024Z 1K ohm 0 1W 8 R221 R201 R208 R219 R222 R2...

Page 25: ...MIC P C B 2 C501 C502 C503 C504 CC0501027L 0 001 F 50V 3 C505 C506 CC0501037L 0 01 F 50V 4 Q501 TDTA0124ES T R DTA124ES 5 L501 ECCHK16001 CHOKE COIL 5 6 H 6 L502 ECBAD18526 BEAD COIL 7 MIC PCB EX06N41...

Page 26: ...RCU141024Z 1K ohm 1 4W 6 R3 RCU144724Z 4 7K ohm 1 4W 7 R2 RCU141034Z 10K ohm 1 4W 8 R8 RCM144724B 4 7K ohm 1 4W 9 C4 C5 C6 CC0501037L 0 01 F 50V 10 C2 CE0251067Z 10 F 25V 11 C1 CE0164767Z 47 F 16V 12...

Page 27: ...ON RV10203541 1KA PUSH SW 6 RF POWER RV50203525 VR 5KB 7 C501 CM0502235Z 0 022 F 50V 8 BAND P C B ENRG0IC080 MODULAR IC080 9 JP1 WX01070710 JUMPER WIRE 10 J1 J2 J12 J14 J16 J17 J5 J18 J19 EX07N48223 P...

Page 28: ...IPTION 1 EPT073N30Z DISPLAY P C B 2 DISPLAY P C B EX03N40483 LED DISPLAY 3 R325 R327 RCY011024Z 1K ohm 0 1W 4 ANT EX01Y40116 LED LAMP 5 R B EX01Y40117 LED LAMP 6 T R EX01Y40114 LED LAMP 7 LED1 LED2 LE...

Page 29: ...28 PART LIST DX 959 MODE P C B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT095930Z MODE P C B 2 SWR OFF PA USB LOW EWSL31027K SLIDE SW REMARK SOLDER SIDE WHITE...

Page 30: ...29 DX 959 MAIN PCB REMARK SOLDER SIDE WHITE PART LIST DX 959 MAIN PCB...

Page 31: ...C218 CC0500301L 3PF 50WV C79 CC0500501L 5PF 50WV C1 49 108 147 CC0501004L 10PF 50WV C76 CC0501804L 18PF 50WV C36 CC0502704L 27PF 50WV C287 CC0503304L 33PF 50WV C8 CC0508204L 82PF 50WV C4 70 CC0501015L...

Page 32: ...L16 ECCHK16246 22UH 2 4mm L28 30 ECSPG18003 0 8x6 5x7 5t L29 ECSPG18075 0 8x6x8 5t L31 ECSPG18365 0 8x6 5x7 5t L35 ECSPG18001 0 8x3 5x7t L38 ECRFZ10048 25UH L39 41 13 ECBAD18526 3 5x6x1 2 VR7 12 16 1...

Page 33: ...J10 EX07N49029 WIRE CONN H J18 EX07N49024 WIRE CONN H J3 EX07N49073 WIRE CONN H J9 EX07N49023 WIRE CONN H J3 METER J9 20Z EX07N49005 WIRE CONN H LAMP J1 20Z EX07N48233 WIRE CONN H R233 J1 50Z EX07N48...

Page 34: ...33...

Page 35: ...AT0959040A...

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