galaxy_dx2547_Service Manual.pdf

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1、 - 1 - DX 2547 TABLE OF CONTENTS PAGE CHAPTER 1 SPECIFICATIONS 1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Receiver

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 CHAPTER 2 OPERATION 2.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1 Control and Connections . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . 3 2.1.1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1.3 Frequency Chart . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3.1 Proce

5、dure to Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3.2 Procedure to Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.4 Alternate Microphones and Installation . . . . . . . . . . . . . . . . . . . . . . . . . 10 CH

6、APTER 3 CIRCUIT DESCRIPTION 3.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.1 PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2 Receiver Circuit . . . . . . . . . . . . . .

7、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.3 Transmitter Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.4 Transmitter Amplifier Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 CHAPTER 4 ALIGNMENT 4.0 Required Test

8、Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.1 Alignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.1.1 PLL Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.1.

9、2 Transmitter Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.1.3 Receiver Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 CHAPTER 5 MAINTENANCE 5.0 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . .

10、 . . . . . . . . . . . . . . . . . . . 18 5.1 Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.2 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 CHAPTER 6 DIAGRAMS AND PART LIST 6.0 PCB Layo

11、ut and Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 CHAPTER 1 - 2 - DX 2547 SPECIFICATIONS 1.0 GENERAL Model DX 2547 Frequency Range 26.965 27.405 MHz Emission Modes AM/USB/LSB Frequency Control Phase Lock Loop (PLL) synthesizer Frequency Tolerance 0.005 % Frequ

12、ency Stability 0.001 % Operating Temperature Range -30C to +50C Microphone Dynamic PTT, 500 Input Voltage (DC/AC Selectable) 13.8V DC / 110V AC 60Hz Current Drain: Transmit (AM full mod.) 3.5A Current Drain : Receiver (Squelched) 0.5A (Max. audio output) 1A Antenna Connector UHF; SO239 1.1 TRANSMITT

13、ER RF Power Output AM : 4W ; SSB : 12W PEP RF Transmit Modes AM/SSB Modulation High and Low level Class B, Amplitude Modulation : AM and SSB. Spurious Emissions - 60dB Carrier Suppression - 60dB Audio Frequency Response 300 to 2500 Hz Antenna Impedance 50 Ohms Output Indicators Meter shows relative

14、signal strength, RF output power, SWR and AM Modulation level. Transmit LED glows red when transmitter is in operation. 1.2 RECEIVER Sensitivity For 10dB S/N (AM/ SSB) 0.5V / 12W Spurious Emission Minimum. Balance Power Between CH1 and CH40. SSB ALC Set radio to CH 19 USB TX mode. AF signal 30mV, 1

15、KHz to microphone. VR13 11.5 W SSB Carrier Balance Set radio to CH 19 USB TX mode. Set MIC GAIN Fully Counter Clockwise. Connect Oscilloscope to antenna connector. VR6 Spurious Emission to Minimum. AM TX High Power Set radio to CH 19 AM TX mode. Modulation Off. VR14 3.8 W AM TX Low Power Set RF POWE

16、R fully counterclockwise. VR18 0.5W RF Power Meter Set radio to CH 19 AM TX mode. Set RF POWER fully Clockwise. Set SWR/MOD/PWR Switch to PWR position. VR9 For a needle reading of “4” on TX PWR scale. AM Modulation Meter Set radio to CH 19 AM TX mode. AF signal 30mV, 1 KHz to microphone. Set MIC Gai

17、n fully Clockwise. Set SWR/MOD/PWR Switch to MOD position VR16 For a needle reading of 95% on the Modulation scale. Frequency Counter Adjust Set radio to CH 19 AM RX mode. Set CLARIFIER Control to 12 oclock. VC1 on frequency counter Display should be 27.1850 4.1.3 RECEIVER ALIGNMENT - 16 - ITEM U.U.

18、T. SETTING ADJUST POINT MEASUREMENT AM Sensitivity Set radio to CH 19 AM RX mode. Set RF GAIN Fully Clockwise. Set SQ Fully Counter Clockwise. Set VOL Control at 2 oclock. Set NB/ANL switch to OFF position. Set TONE Fully Clockwise. Set CLARIFIER Control to 12 oclock. Connect RF SG to antenna jack F

19、requency 27.185 MHz, 1uV. Mod 30%. L2,L3,L5,L6, L7,L8,L9,L10 Audio Output 2V S/N 10 dB. Set radio to CH 40 AM RX mode. RF SG setting 27.405 MHz. Set radio to CH 1 AM RX mode. RF SG setting 26.965 MHz. L5,L6 For Balance Between CH 1 and CH 40. USB Sensitivity Set radio to CH19 USB RX mode. Set VOL Co

20、ntrol Fully Clockwise. RF SG setting 27.186 MHz, 0.5uV. Mod off. L11,L12 Audio Output 2V S/N 10dB. LSB Sensitivity Set radio to CH19 LSB RX mode. Set VOL Control Fully Clockwise. RF SG setting 27.184 MHz, 0.5uV. Mod off. L11,L12 Audio Output 2V S/N 10dB. NB Adjust Set radio to CH 18 AM RX mode RF SG

21、 setting 27.185 MHz, 1000uV. Mod off. Set NB/OFF switch to ON position. Connect Multimeter to TP1 (D2 cathode). L1 DC Voltage to max. ( 2.0V ) AM Squelch Set radio to CH 19 AM RX mode. Set SQ Control Fully Clockwise. RF SG setting 27.185 MHz, 20mV. Mod 30%. VR4 Adjust very slowly until squelch just

22、closes. SSB Squelch Set radio to CH 19 USB RX mode. Set SQ Control Fully Clockwise. RF SG setting 27.186 MHz, 20 mV. Mod off. VR3 Adjust very slowly until squelch just closes AM S-Meter Set radio to CH 19 AM RX mode. RF SG setting 27.185 MHz, 100uV. Mod 30%. VR1 For a reading of “9” on the “S” scale

23、. SSB S-Meter Set radio to CH 19 USB RX mode. RF SG setting 27.186 MHz, 100uV. Mod off. VR2 For a reading of “9” on the “S” scale - 17 - Figure 4-1 Transmitter test setup Figure 4-2 Receiver test setup - 18 - DX 2547 CHAPTER 5 MAINTENANCE 5.0 PRECAUTIONS The inherent quality of the solid-state compo

24、nents used in this transceiver will provide many years of continuous use. Taking the following precautions will prevent damage to the transceiver. (i) Never key the transmitter unless an antenna or suitable dummy load is connected to the antenna receptacle. (ii) Ensure that the input voltage does no

25、t exceed 16 VDC or fall below 11 VDC and does not exceed 110 VAC. (iii) During alignment, do not transmit for more than 10 seconds at a time. Transmitting over long periods can cause heat built-up and cause transmitter damage. 5.1 PERIODIC INSPECTION This unit is aligned at the factory to deliver ma

26、ximum performance. However, continued performance cannot be expected 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 cracked, seal with vinyl tap

27、e. If immersed with water, install new coaxial cable. Coaxial & power plug connections If loosened, reconnect. If corroded, clean contacts. Battery connection If corroded, clean power terminals. Ground terminal If corroded, clean terminal. 5.2 FUSE REPLACEMENT To protect the equipment from serious d

28、amage, a fuse is provided on the power supply lines. The fuses protect against over voltage / reverse polarity or internal fault of the equipment. If the fuse has blown, first find out the cause of the trouble before replacing it. A fuse rated for more than the transceiver requirement should not be

29、used, since it may permanently damage the equipment. Damage due to over fusing is not covered by the warranty. CHAPTER 6 - 19 - DX 2547 DIAGRAMS & PARTS LIST 6.0 GENERAL Information on most electrical and mechanical parts is included in the parts list. The reference designators are in alphanumeric o

30、rder. - 20 - - 21 - PART LIST: DX 2547 ROTARY SW P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT0SSB30A ROTARY SW PCB 2 R301 RCY014714Z C/F/R 470 0.1W 3 R302,R303,R304,R305, R306,R308,R309,R310, R311,R312,R313 RCY011024Z C/F/R 1K 0.1W 4 R314 RCY013324Z C/F/R 3.3K 0.1W 5 R315 RCY0110

31、34Z C/F/R 10K 0.1W 6 D306,D307,D308, D309,D310,D311, D312,D313,D321 EDSS00181Y DIODE 1SS181-TE85L 7 D314,D315,D316,D320 EDSS00184Y DIODE 1SS484-TE85L 8 D301,D302,D303,D304, D305,D317,D318,D319, D322,D323,D324 EDSS00355Y DIODE 1SS355 9 Q304 TY2SC2715G TR 2SC2712GR-TE85L 10 Q301,Q302,Q303 TYZRN1403Z T

32、R RN1403-TE85L 11 ROTARY SW EWRT32000S ROTARY SW 12 J306 EX07N48490 PCB CONN/S 4PIN 13 J307 EX07N48209 PCB CONN/S 10PIN REMARK: TOP: COPPER SIDE (BLUE) BOTTOM: COMPONENT SIDE (BLUE) - 22 - PART LIST: DX 2547 HP ANT P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT360042Z ANT P.C.B 2 R

33、9 RCY010004Z 0 OHM 0.1W 3 R1 RCY014714Z 470 OHM 0.1W 4 R3,R4 RCY011014Z 100 OHM 0.1W 5 R2 RCY013314Z 330 OHM 0.1W 6 R5,R11 RCY011024Z 1K OHM 0.1W 7 R10 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 50WV 12 C6

34、 CK1030AB1A 3PF 50WV 13 C3,C4 CK2104AB7R 0.1uF 25WV 14 C1,C2 CK1103AB7L 0.001uF 50WV 15 Q1 TY2SC2712G TR 2SC2712GR 16 D3 EDSS00355Y DIODE 1SS355 17 D1,D2 EDHM0198SY DIODE HSM198S 18 D4 EDMA0028TY DIODE MA28T 19 L1 ECRFZ10053 RF COIL C3RH0610 20 VR1 RE10300009 S/F/R 10K OHM 21 JP1 WX01070715 JUMPER W

35、IRE REMARK: COPPER SIDE (BLUE) - 23 - PART LIST: - 24 - DX 2547 HP ANT P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT009830Z ANT PCB 2 R312 RCY011004Z C/F/R 10 0.1W 3 R308 RCY011014Z C/F/R 100 0.1W 4 R316 RCY012714Z C/F/R 270 0.1W 5 R323 RCY012224Z C/F/R 2.2K 0.1W 6 R324 RCY014724Z

36、 C/F/R 4.7K 0.1W 7 R325 RCY011024Z C/F/R 1K 0.1W 8 R309,R310,R311,R313- R315,R318-R321,R326 RCY011034Z C/F/R 10K 0.1W 9 R305,R307,R317 RCY011534Z C/F/R 15K 0.1W 10 R302,R327,R301 RCY014734Z C/F/R 47K 0.1W 11 R303,R304,R306,R322 RCY011044Z C/F/R 100K 0.1W 12 C302 CK1101AB5L CHIP/C 100PF 50WV 13 C301,

37、C307 CK1561AB5L CHIP/C 560PF 50WV 14 C304,C316,C319,C320 CK2104AB7R CHIP/C 0.1uF 25WV 15 C303 CK1223AB7R CHIP/C 0.022uF 50WV 16 C309,C311,C317, C321,C322 CK1103AB6U CHIP/C 0.01uF 50WV 17 C315 CK133AB6U CHIP/C 0.033uF 50WV 18 C312,C314 CK1473AB7R CHIP/C 0.047uF 50WV 19 C313 CK1332AB7R CHIP/C .0033uF

38、50WV 20 C305,C306 CK1472AB5X CHIP/C .0047uF 50WV 21 C310 CTY164756Z T/C 4.7uF 16WV 22 IC301 YNJR00324M IC NJM324M 14PIN 23 Q302 TYZRN1403Z TR RN1403-TE85L 24 Q301 TY2SC2712G TR 2SC2712GR-TE85L 25 D301 EDSS00226Y DIODE 1SS226-TE85L 26 - GZZZ50098Z IC PIN REMARK: TOP: COPPER SIDE (BLUE) BOTTOM: COMPON

39、ENT SIDE (BLUE) - 25 - PART LIST: DX 2547 PUSH SW P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT254720Z PUSH SW PCB 2 PA,RB EWPS33033X PUSH SW 3 J201 EX07N49140 PCB CONN/S 2PIN 4 CB/G/PA EX07N49144 PCB CONN/S 3PIN REMARK: COPPER SIDE (WHITE) - 26 - PART LIST: DX 2547 PUSH SW P.C.B

40、ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT254750Z PUSH SW PCB 2 J501 EX07N48234 PCB CONN/S 2PIN 3 J503 EX07N48761 PCB CONN/S 4PIN 4 J502 EX07N48667 PCB CONN/S 5PIN 5 9/NOL/19 EWRT32087S ROTARY SW 6 SQUELCH RV50303532 VR 50KB 7 VOLUME RV50303547 V/R 50KA 8 JP501,502,503 WX01070708 JUM

41、PER WIRE 9 PUSH SW PCB ENRG0IC080 MODULAR-002B REMARK: COPPER SIDE (WHITE) - 27 - - 28 - PART LIST: DX 2547 DISPLAY P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT254740Z DISPLAY PCB 2 C401 CEM164767Z E/C 47uF 16WV 3 R414,R420,R421 RCP160004Z C/F/R 0 1/16W 4 R422 RCP161014Z C/F/R 10

42、0 1/16W 5 R401-R408 RCP164714Z C/F/R 470 1/16W 6 R409,R417,R425-R428 RCP161024Z C/F/R 1K 1/16W 7 R423 RCP166824Z C/F/R 6.8K 1/16W 8 R410,R418 RCP162234Z C/F/R 22K 1/16W 9 R419 RCP166834Z C/F/R 68K 1/16W 10 R411,R412,R413, R415,R416 RCP164734Z C/F/R 47K 1/16W 11 D410 EX01Y40114 LED LAMPS 12 D409,D411

43、 EX01Y40116 LED LAMPS 13 D401-D408 EX01N40090 LED 14 1,2,3,4,5,6 EX03N40476 LED DISPLAY 15 DISPLAY EX03N40488 LED DISPLAY 16 J401,J403,J407,J413 EX07N48223 PCB CONN/S 2PIN J409 EX07W48824 PCB CONN/S 3PIN 17 J408,J410,J411,J412,J414 EX07N48350 PCB CONN/S 3PIN 18 J402 EX07N48490 PCB CONN/S 4PIN 19 J40

44、5,J406 EX07N48928 PCB CONN/S 12PIN 20 ANL,NB,NF,CLARIFIER EWPS33033X PUSH SW 21 Q401-Q404 T2SC00945P TR 2SC945P 22 Q405,Q406 TDTC0124ES TR DTC124ES REMARK: TOP: COPPER SIDE (WHITE) BOTTOM: COMPONENT SIDE (WHITE) - 29 - PART LIST: DX 2547 TALKBACK P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRI

45、PTION 1 EPT254760Z TALKBACK PCB 2 TALKBACK PCB EX07N48667 PCB CONN/S 5PIN 3 TALKBACK RV20303558 VR 20 LA REMARK: COPPER SIDE (WHITE) - 30 - PART LIST: DX 2547 MIC P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT253750Z MIC PCB 2 C503,C504,C505,C506 CC0501027L C/C 0.001uF 50WV 3 C501,

46、C502 CC0501037L C/C 0.01uF 50WV 4 Q501 TDTA0124ES TR DTA124ES 5 L501 ECCHK16001 CHOKE COIL 6 L502 ECBAD18506 BEAD COIL 7 14 EX06N41101 MIC JACK 8 J502 EX07N48223 PCB CONN/S 2PIN 9 J501 EX07N48350 PCB CONN/S 3PIN REMARK: TOP: COPPER SIDE (WHITE) BOTTOM: COMPONENT SIDE (WHITE) - 31 - - 32 - PART LIST:

47、 DX 2547 COUNTER P.C.B ITEM REFERENCE NUMBER RANGER PART NUMBER DESCRIPTION 1 EPT900040Z COUNTER P.C.B 2 R40 RCY010004Z 0 OHM 0.1W 3 R19-R39 RCY011014Z 100 OHM 0.1W 4 R6 RCY013314Z 330 OHM 0.1W 5 R9 RCY014714Z 470 OHM 0.1W 6 R4,R5 RCY012224Z 2.2K OHM 0.1W 7 R7 RCY014724Z 4.7K OHM 0.1W 8 R3,R10,R12 RCY011034Z 10K OHM 0.1W 9 R13-R18 RCY012234Z 22K OHM 0.1W 10 R11 RCY013334Z 33K OHM 0.1W 11 R41,R42 RCY014734Z 47K OHM 0.1W 12 C15 CK1150AB4A 15PF 50WV 13 C14 CK1330AB4A 33PF 50WV 14 C2,C6,C8,C10,C11,C12, C17,C19,C21,C29,C31, C32,C33,C35,C36,C28 CK2104AB7R 0.1uF 25WV 15 C5,7,16,20,22,25,38