Service Manual
Contents
1. 147 2 1 10 695MC X 3 5 5 4148 t g 5 E 5 8 5 42. 16 47u 474 16 104 103 2 06 C603 601 C605 475 60 C6 C 2 PS 2 P4 pe main pc gt B GN NI J205 CB 2 RX 2D 26 R302 OF 680 D3021SS 1 Loom 2 eB ace 1F 1D 10 18 TA COM com LED201 0206 AST RX 2N1403 AST SWR LED202 7 ANV x 9202 9 O 6 0 e IT DISPLAY PCB 929307 9404 MOD LED GAIN 1 0401 Ts 124 C403 VR401 5 VR PCB EPT092940Z EM VOL SOKA 50 S0KB C405 8v nb anl EL 2 218 5 318 5 5 EPTO929507 5 5 TE DN 3 RANGER ELECTRONIC COMMUNICATIONS INC DX 979
3. it J I RS RANGER Z C9 929137 JPet 81 1 JP14 MiC OPRI 5814 oZ gt C r COMPONENTS SIDE 28 ENSE mum sess aJ c E UE Ue a UD PART LIST DX 979 MAIN PCB REFERENCE RANGER DESCRIPTION NUMBER PART NO EPT092913Z MAIN PCB EPT120060A DCB PCB R19 305 258 B239 RCP160004Z 0 1 16W 246 RCP161004Z 100 1 16W R267 RCP161504Z 150 Q 1 16W 241 RCP162204Z 220 1 16W R133 213 253 282 113 RCP164704Z 47 1 16W R130 215 220 249 RCP165604Z 56 1 16W R11 101 RCP166804Z 68 O 1 16W R5 8 30 33 76 81 174 260 263 1610147 100 Q 1 16W 3 95 169 32 100 245 RCP161514Z 150 Q 1 16W R23 RCP161814Z 180 Q 1 16W R140 163 177 259 B239 RCP162214Z 220 1 16W R
4. R a NO 696 OO CI NO 25 19 SPEAKER 8 Oyo 375 4Y s ING PLATE a N N FOAM14X16X20MM SCR UPDATES 8 CORRECTIONS Any updates or corrections to this Service Manual will be included in the Tech Support section of our website at www GalaxyRadios com Galaxy Two Year Warranty This new Galaxy radio is covered by a two year limited warranty Here are the details e All of our Galaxy radio model numbers begin with the letters DX and are covered by our Limited Two Year Parts and Labor Warranty e Limited means that we will repair problems caused by factory defects or normal use at no charge Work performed by qualified technicians which did not cause any damage to the radio will not void the warranty and will be left intact Problems caused by unqualified technicians or operator abuse can also be repaired but there will be a charge e The warranty period begins when the radio is first purchased However in the event that the dated sales receipt has been lost or the radio was purchased used our radios are still covered for 26 months from the date of manufacture based on the serial nu
5. 103 100V gt k no 1 sl 8 8 MAB7T A ANA 518 S SN R269 DUS 5 0 i m WT 5 5 Ce39 4148 5 5 4 5 8 2 55 07 5 6515 loo z 818 BS 8 94 7 5 Els Ela RANGER 5 879 878 Hd ELECTRONIC COMMUNICATIONS INC Tea s 8 5 e 3 E MODEL DX 979 E EPT0929107 it R320 P z C305 TITLE SCHEMATIC DIAGRAM D157 APPROVED CHECKED MAR Z 2003 962 ZALLU NO 979 EXPLODE DRAWING gt JN e ok ok 979 MECHANICAL PART PART NUMB PART NAME ary p FRONT PAHEL 2 D PLATE DX979 5 EL PLATE DX979 4 FRONT HOUSING 5 CH KNOB 6 VR KNOB 7 OUTER KNOB 8 NNER KNOB 9 SPRING D 10 D SPRING B 11 D SPRING A 72 7 14 5 16 4 7 18 M2X6 O HOLDER ROP NIN Cn C NININ 00 00 CA Oi Gy JACK 4P MASK PLATE SW gt 5 gt Ga CAI
6. CHIP F R 10K 0 1 W C401 C402 CK1102AB5X 001uF SOVW 403 404 CK1103AB5X CHIP C 01uF 50VW VR404 RE102Y0128 CHIP F R TMC3KJ AI 65 402 YCTLI5653C CHOKE COIL 5 6uH 1401 YCBAD18581 BEAD FERRITE COIL WB 403025 Q902 TYDTA 124EA T R 124 106 VR401 VOL SQ OFF RV50303522 50KB 50KA W SW MIC RF RV 10203524 V R DIM PWR RV50203539 5 5 J401 J408 J410 J411 EX07N48223 CONN S 2PIN 7403 1405 7413 EX07N48350 CONN S 3PIN J406 J414 EX07W48824 CONN S 3PIN J407 EX07N41216 CONN S 3PIN J402 EX07N48222 CONN S 5PIN J409 EX07W48826 23 PCB CONN S 5PIN DX 979 TALKBACK CLARIFIER CONTROL VR PCB EPT092950Z COMPONENT SIDE COPPER SIDE PART LIST DX 979 TALKBACK CLARIFIER CONTROL VR P C B REFERENCE RANGER PART NUMBER NUMBER DESCRIPTION EPT092950Z TB PCB VR501 CLARIFIER RV 10203528 VR 1KB VR502 TALKBACK RV20203558 VR 20KB SW J501 EX07N48331 CONN S 6 PIN J503 EX07N48350 PCB CONN S 3 PIN 24 DX 979 METER PCB EPT092961Z COMPONENT SIDE COPPER SIDE COPPER SIDE SMD 25 PART LIST REFERENCE NUMBER DX 979 METER PCB Dimmer Circuit RANGER PART
7. Q207 TY28C2712G TR 2SC2712GR TE85L Q201 Q202 Q203 Q204 Q206 TYZRN1403Z TR RN1403 TE85L Q205 TYZRN2403Z RN2403 TE85L J201 J206 EX07N48223 CONN S 2 PIN J203 EX07N48350 CONNSS 3 J202 EX07N48222 PCB CONN S 5 PIN J204 EX07N48209 CONNSS 10 PIN ROTARY SW EWRT32059S ROTARY SW GPS 0668 J205 WX01070710 19 JUMPER WIRE DX 979 DISPLAY PCB EPT092930Z _ 966665 8 zr PART LIST DX 979 DISPLAY P C B REFERENCE NUMBER RANGER PART NUMBER EPT092930Z DESCRIPTION DISPLAY PCB R301 R302 R303 R304 R305 R306 R307 RCY016814Z CHIP F R 680 2 0 1W R308 0110247 CHIP F R 1K 0 1W D301 D302 EDSS00355Y DIODE 155355 LED201 LED202 01 40114 LED LAMPS KM 23ESGC DISPLAY EX03N40419 LED DISPLAY TX 566 HI OFF LO NB CB PA SWR MOD PWR EWSL31027K 221 SLIDE SW DX 979 DIM PWR MIC RF VOL SQ CONTROL VR PCB EPT092940Z Aa 8 COMPONENT SIDE us COPPER SIDE PART LIST DX 979 DIM PWR MIC RF VOL SQ CONTROL VR REFERENCE NUMBER RANGER PART NUMBER EPT092940Z DESCRIPTION VR PCB R402 RCY016824Z CHIP F R 6 8K 0 1W R401 0110347
8. 12290 LET L20 21 22 ECIFT12012 113CN 6514X 125 1 2013 113CN 6485Z L23 24 ECIFT12016 113CN 6344Z LL ECIFT12252 LET L44 12255 LET 19 10 ECIFT12256 LET 1 12 ECIFT12257 LET 1 15 12258 LET L40 12262 LET 1 14 12263 143 12265 C306 L43 PIN4 amp 6 CKI820AA4A 50 15 ECIFT12253 7 42 ECIFT12440 LET L8 12492 LET L48 ECCHK16096 470UH 1503 16000 0 47UH 126 27 46 16003 4700 16004 1 1MH 19 133 37 16070 22UH L47 ECCHK16176 4 7UH L16 ECCHK16246 22UH L28 30 ECSPG18003 SPRING COIL L29 ECSPG18075 SPRING COIL 131 ECSPG18365 SPRING COIL L35 ECSPG18001 SPRING COIL L38 ECRFZ10048 25 UH L39 ECBAD18506 BEAD COIL L41 13 ECBAD18526 BEAD COIL VRIO RE10100074 S F R 1000 KVSF6 637A VR16 12 7 18 RE10200041 S F R 1K VM6CK VR14 13 5 0200042 S F R 5K VM6CK VR1 2 6 15 17 RE10300031 S F R 10K VM6CK VR9 RE10400043 S F R 100K VM6CK VR4 3 50400087 S F R 500K Q J9 MIC IP WX01070702 JUMPER JP5 14 15 16 17 18 30 35 WX01070705 JUMP WIRE 36 37 39 55 63 68 69 75 76 85 87 88 91 92 99 100 102 103 104 108 109 110 114 120 124 125 126 129 131 133 136 148 19 153 13 11 2 127 JP31 41 4
9. 16WV C252 CE0162277Z 220UF 16WV C152 179 CE0163377Z 330UF 16WV C91 CE0104777Z 470UF 10WV C243 248 CE0251087Z 1000UF 25WV C35 CEM254767Z ATUF25WV FL3 EFX8106952 10 695MHZ FLI EFCFW455HT 455 FL2 107 SFE10 7MX 240 10240 27 X3 EYBAA15480 15 480 MHZ X4 EYBAE10697 10 6075MHZ 1 IC6 ENMA00612Z AN 612 ICI ENSS00324Z LM324 IC3 ENRG87199 RCI8719A IC7 ENRO04558Z 4558 1 9 8239 ENRCI6130Z 6130 7 08 17 20 T2SC01674L 2SC1674L Q51 T2SC02538Z 25 2538 052 53 25 019062 25 1906 036 TDTCO124ES DTC124ES Q24 43 TDTCO1I4ES DTCI14ES 060 TDTAODA4ES DTA124ES Q30 33 62 T2SA01282E 2SA1282AE 01 2 9 10 11 25 28 29 46 27 2 T2SC01675L 2SC1675L 1 22 50 Q3 4 5 7 16 31 35 39 40 42 T2SC00945P 25 945 44 53 57 13 15 34 56 06 38 T2SA00733P 2SA733P Q55 T2SA01869Z 25 1869 018 19 FMOJ00310Z 10 D3 5 7 9 10 13 14 20 21 95 41487 14148 96 32 35 37 53 60 65 69 75 81 88 89 102 106 107 141 50 108 97 82 155 6 15 24 25 26 27 36 38 50 52 54 5 56 57 85 86 87 90 92 93 8 115 28 29 51 68 114 21 2 11 12 30 31 EDINO0060P IN60P D110 ED1N04003Z 1N4003 D109 ED1N04007Z 1N4007 D16 17 EDSS00053Z 15553 D49 EDSV00251Z 5 2515 D59 72 EDMA00027W 27 D71 145 156 103 EDMA00027T 27 D70 EDZD05519Z 5 1V0 5W D73 EDZD05759Z 7 5 0 5W 12 3 ECIFT12002 7MC 7172ABW L6
10. NUMBER EPT092961Z DESCRIPTION METER PCB R603 0115047 CHIP F R 15 0 1W 606 607 1447047 CHIP F R 47 1 AW R610 0110247 CHIP F R 1KQ 0 1W R605 RCY013324Z CHIP F R 3 3KQ 0 1W R604 R611 RCY011034Z CHIP F R 10KQ 0 1W R601 RCY011234Z CHIP F R 12KQ 0 1W R602 RCY014734Z CHIP F R 47KQ 0 1W N BR 03 R609 RCY011844Z CHIP F R 180KQ 0 1W C602 C609 CK1103AB5X CHIP C 0 01uF 50WV C601 C607 C608 C610 C612 C620 CK1104AB5X CHIP C 0 1uF 50WV C619 613 614 615 616 CK5105AB7R CHIP C 16WV C621 CK1473AB5X CHIP C 0 047uF 50WV C617 CK2474AB7R CHIP C 0 47uF 25WV C605 611 CK5475AA7R CHIP C 4 7uF 16WV C622 CTY161066A 10uF 16WV C603 C606 CEY 1647677 47uF 16WV C604 C618 CEY251077Z 100uF 25WV 1 601 YNSN8144BV SM8144BV D601 EDZD05519Y ZENER DIODE RLZ5 1BT6 11 D602 EDIN04148Y DIODE 1N4148 Q601 602 TY2SC2712G T R 2SC2712GR Q603 TYDTC124EA T R DTC124EUAT106 L602 YCTLI2274E CHOKE COIL 220uH L601 YCTLI4774E CHOKE COIL 470uH LAMP EX02N40230 LAMP 0 05 12V EL SH3024 EX07N49373 CONNSS 3 PIN J603 EX07N48223 PCB CONNSS 2 PIN J601 EX07N48350 CONNSS 3 J602 EX
11. 07N48222 26 PCB CONN S 5 PIN 979 ANTENNA PCB EPT360042Z COPPER SIDE SMD PART LIST DX 979 ANT P C B REFERENCE NUMBER COPPER SIDE NUMBER EPT360042Z RANGER PART 5 DESCRIPTION ANT P C B R9 RCY010004Z 0 OHM 0 1W RCY014714Z 470 OHM 0 1W R3 R4 RCYO011014Z 100 OHM 0 1W R2 RCY013314Z 330 OHM 0 1W RS R11 0110247 OHM 0 1W R10 R12 RCY012224Z 2 2K OHM 0 1W 1 Nn R O gt 7 5 0110347 10K OHM 0 1W C7 CK1059ABIA 0 5 50WV C6 CK1030AB1A 50WV C3 C4 CK2104AB7R 0 luF 25WV CT1C2 CK1103AB7L 0 001uF 50WV Ql TY2SC2712G TR 2SC2712GR D3 EDSS00355Y DIODE 155355 D1 D2 1985 Y DIODE 5 1985 D4 EDMA0028TY DIODE MA28T 11 ECRFZ10053 RF COIL C3RH0610 VRI RE10300009 S F R 10K OHM WX01070715 s27 JUMPER WIRE DX 979 MAIN PCB EPT092913Z C237
12. 162744Z 270K 1 16W R15 111 183 RCP164744Z 470K 1 16W R48 RCP168244Z 820K Q 1 16W R106 RCP161054Z 1 16W R193 RCP161554Z 1 5M Q 1 16W R124 RCP161064Z 10M 1 16W R244 RCP141514Z 150 Q 1 4W R239 RCP121034Z 10K Q 1 2W C8 CC0508204L 82 50WV C4 CC0501015L 100PF 50WV 30 137 CC0501515L 150PF 50WV C31 136 CC0502715L 270PF 50WV C11 14 CC0503315L 50WV C23 CC0505615L 560 50WV 52 197 CC0500101A 1PF SOWV C225 CC0500201A 50WV C218 CC0500301A 50WV C61 62 90 79 190 CC0500501A SPF SOWV C108 147 1 49 CC0501004A SOWV C84 89 CC0501504A 15 SOWV C43 76 CC0501804A 18 50WV 54 55 CC0502204A 22 50WV C119 279 226 287 CC0503304A 50WV C195 CC0503904A 39PF SOWV C202 224 CC0504704A 47PF 50WV 88 116 117 CC0506804A 68 50WV C191 150 CC0501015A 100PF 50WV C194 192 CC0501515A 150PF 50WV C196 222 295 CC0501815A 150 50WV C139 141 CC0503904D 9 50WV C140 CC0501515D 150PF 50WV C130 CC0502004G 20PF 50WV C281 CC0501015G 100 50WV C282 CC0501815G 180PF 50WV C220 CC0502215G 220 SOWV C86 CC0502715G 270 50WV C201 203 CC0503915G 390PF 50WV C210 CC0504715G 470PF 50WV C74 85 CC0505615G 560PF 50WV C199 CD3005614Z 560P 300WV C7 47 50 95 99 110 118 120 CC0501027L 0 001UF 50WV 174 183 244 245 100 246 C81
13. 173 193 206 207 236 CC0501047L 0 1UF 50WV 213 234 250 256 259 272 249 302 270 177 215 292 40 171 235 211 291 C5 18 48 65 87 92 CC0504737L 0 047UF SOWV 96 102 105 106 257 151 160 233 240 251 253 258 260 261 263 20 217 68 72 143 266 C32 42 45 46 221 162 163 CC0504727L 0 0047UF 164 SOWV C155 CC0502237L 0 022UF 50WV C200 CC1001037L 0 01UF 100WV C2 3 6 9 15 16 17 19 51 57 CC0501037L 0 01UF 50WV 58 60 109 114 133 138 161 205 219 229 230 232 247 265 267 269 271 278 285 298 188 63 66 69 73 127 134 135 142 145 146 241 305 306 307 308 309 310 311 312 131 262 216 154 CT0162246Z 0 22UF 16WV C97 149 CT0161046Z 0 1UF 16WV C98 180 299 300 CT0162256Z 22UF 16WV C178 296 CM0501045Z 0 1UF 50WV C237 78 CM0501024Z 0 001UF 50WV C184 CM0501035Z 0 01UF 50WV C39 185 CM0502235Z 0 022UF 50WV C176 CM0504725Z 0 0047UF SOWV C34 CM0504735Z 0 047UF 50WV C12 CM0502225Z 0 0022UF SOWV C198 CE0501047Z 0 1UF 50WV C10 CE0504747Z 0 47UF 50WV C67 75 153 157 170 186 187 CE0501057Z 1UF 50WV C159 214 242 CE0502257Z 2 2UF SOWV C103 182 CE0504757Z 4 7UF 50WV C13 21 22 44 82 115 158 275 CE0251067Z 10UF 25WV 276 132 239 1 CV038200AZ TRIMMER C 20P CV38D2001 C80 181 CE0252267Z 220 25WV C37 175 33 144 38 CE0254767Z 47UF 25WV 156 238 293 107 01610772 100UF
14. 3 46 79 80 81 82 84 WX01070706 JUMP WIRE 97 106 155 156 6 JP25 57 58 71 96 116 117 WX01070707 JUMP WIRE 122 123 130 142 119 3 70 113 141 JP22 24 29 107 134 135 132 WX01070708 JUMP WIRE JP11 20 38 40 42 83 94 98 4 WX01070709 JUMP WIRE 128 JP7 10 26 27 44 61 62 65 72 WX01070710 JUMP WIRE 73 74 78 89 95 114 115 118 138 150 149 151 152 66 67 77 105 146 147 33 64 JP8 21 51 139 86 WX01070711 JUMP WIRE JP12 52 140 WX01070712 JUMP WIRE JP23 48 111 137 144 154 34 WX01070713 JUMP WIRE 145 8 JP32 45 93 WX01070714 JUMP WIRE JP1 47 49 50 54 56 58 90 WX01070715 JUMP WIRE 121 143 J7 17 22 25 31 34 EX07N48223 P C S 2P J6 11 18 32 EX07N48350 P C S 3P 121 EX07N48490 P C S 4P J3 5 20 EX07N48222 P C S 5 J1 14 EX07N48331 P C S 6P 133 EX07N48209 P C S 10P 5 716 EX07N41330 P C S 2P J12 EX07N41227 P C S 3P TP2 3 5 EX07N48612 1PIN L 11 8 7 8 9 XZZZ90006Z PA EXP SP EX06N41045 EAR JACK L503 WX0012015A TUBE L504 WH0007005Z LEAD WIRE 979 SCHEMATIC DIAGRAM CONTROL PCB r 0221 n 0222 0223 r 40224 81 1 0225 de u EPT092920Z METER EPTO92960Z
15. 31 99 RCP162714Z 270 1 16W R6 10 16 24 248 254 300 299 RCP163314Z 330 O 1 16W R188 268 293 154 155 156 RCP164714Z 470 Q 1 16W 250 280 R266 RCP165614Z 560 O 1 16W R4 50 209 89 94 RCP166814Z 680 O 1 16W R74 RCP168214Z 820 Q 1 16W R62 64 67 72 115 116 118 RCP161024Z IK Q 1 16W 122 123 136 138 160 164 179 186 189 205 206 214 303 232 237 238 261 269 291 292 295 98 166 167 320 R192 88 RCP161224Z 1 2K 1 16W R132 207 233 247 RCP161524Z 1 5K 1 16W 255 273 251 79 80 54 87 97 R226 RCP161824Z 1 8K 1 16W R20 27 71 75 134 RCP162224Z 2 2K Q 1 16W 162 283 313 93 114 197 279 R9 25 28 121 RCP162724Z 2 7K 1 16W R18 22 66 73 128 RCP163324Z 3 3K 1 16W 191 219 274 73 252 60 110 171 R52 57 RCP163924Z 3 9K 1 16W R26 84 165 190 195 196 131 gt 1647247 4 7K Q 1 16W R264 265 83 92 RCP165624Z 5 6K Q 1 16W R14 40 41 70 82 312 RCP166824Z 6 8K 1 16W R275 90 RCP168224Z 8 2K 1 16W R1 13 17 65 68 159 161 175 1610347 10K Q 1 16W 181 202 210 216 227 231 272 276 296 297 262 56 86 173 R178 310 153 RCP161234Z 12K 1 16W R180 RCP161534Z 15K 1 16W R187 208 91 109 RCP162234Z 22K Q 1 16W R2 309 311 RCP163334Z 33K Q 1 16W R46 RCP163934Z 39K Q 1 16W R7 29 61 63 185 218 126 157 RCP164734Z 47K Q 1 16W 222 224 96 150 R21 105 107 RCP166834Z 68K Q 1 16W R45 RCP168234Z 82K 1 16W R12 42 43 44 51 53 104 108 1610447 100K Q 1 16W 112 182 184 221 225 278 R47 117 135 139 194 RCP162244Z 220K 1 16W R49 55 176 170 172 RCP
16. 8 gel 23 915 3 EN E 6 133 184148 oo 1 025 10 240MHz w Ee UN 2 MICROPHONE FREQUENCY Icoza _ R COUNTER 14148 2 ice OO 5 1K y 8 5 J13 5 8 5 1 MIKE GAIN P VRSI 5 E 10K B a E li RF GAIN x a VRS03 3 J13 8 o 2 4 0020 3 m 2000 lt O NB ANL la E i qp 2 19 99 Ba 8 5 2 34 5 Y 3 929302 5 ES q B 25 s 9 0 Gt 300 8 Lo 90 8 J 135 m m 9 4 51 nee 5 lt 16 L gt 5 2 Y z x 2F w 6 18 5 209 03 01 8 E 8 on ie 5 cuo 19 1 so 4 7 7 7 7 5 x e a 7155 5 po 214 8 28 5 5 8 o 7 Qd 5 2 g y 236 194576 5 10 6975 ZU 5 lt p a oNB ANL Sls R27S 4 pice 38 575 1 JE 5 2 E z Lo RI63 220 D109 ae 1 1 oH 4007 8 Slo 53 849 7 8 78 lo 3 2 2166 08 2 C199 3 051 220 LO S 9 g 7 08 5 po HE 2 8 65 T 2 18003 53652 2 WE C800 B E
17. 9 AM RX mode For a reading of 9 SG setting 27 185 MHz 100uV Mod 30 1 on the 5 scale SSB S Meter Set radio to CH 19 USB RX mode RF SG setting 27 186 MHz 100uV Mod off 415 For a reading of 9 on 5 scale meter F 000000 000000 D O O ET ENET EE EE gt Sr EZ ES ES EE Ee El Figure 4 1 Transmitter test setup SAS cr USCIIIO05 1 1 90 0675000 EN 00000000 0000 0000 O 0000 Figure 4 2 Receiver test setup 14 979 MAIN PCB ADJUSTMENT LOCATION DRIVER BIAS 2 3 FINAL J BIAS ALG J v C AM LOW POWER 2 AM HI POWER WE A 212 7 MOD C l AM S METER SSBS METER 10 240 MHz 52
18. ADJUST CARRIER J BALANCE OO PTS SSB SQUELCH N gm SQUELCH 15 5 979 MAINTENANCE Ses 5 0 PRECAUTIONS The inherent quality of the solid state components 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 not exceed 16 VDC or fall below 11 11 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 maximum performance However continued performance cannot be expected without periodic inspection and maintenance Important points to be checked regularly are as follows Check Item Action If cracked or broken replace it If sheath is cracked or immersed in water install new coaxial cable If loosened reconnect If plug connections 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 damage a fuse is provided on the power supply lines The fuse protects against over voltage reverse polarity or internal fault of the equipment If the fuse has blown first find out th
19. CB from TP7 TP8 TP9 Connect current meter to TP7 and TP9 50 mA Connect current meter to TP7 and TP8 100 mA SSB APC Set radio to CH 19 USB RX mode 12 5 VDC Connect Multi meter to TP7 SSB TX Power Connect short PCB to TP7 and TP9 MAX gt 12W Connect RF Power Meter to antenna jack Spurious Emission Set radio to CH 19 USB TX mode Minimum AF signal 30mV 1 KHz to microphone Balance Power Set RF PWR fully clockwise Between and Set MIC GAIN fully clockwise SSB ALC Set radio to CH 19 USB TX mode AF signal 30mV 1 KHz to microphone SSB Carrier Set radio to CH 19 USB TX mode Balance Set MIC GAIN fully counter clockwise Spurious Emission to Connect Oscilloscope to antenna connector Minimum AM TX Set radio to CH 19 AM TX mode High Power Modulation Off 3 8 W Set RF POWER fully clockwise AM TX Set RF POWER fully counterclockwise 0 3W 0 2W Low Power RF Power Set radio to CH 19 AM TX mode For a needle reading Meter Set RF POWER fully clockwise of 4 on TX PWR Set SWR MOD PWR Switch to PWR scale position AM Modulation Set radio to CH 19 AM TX mode For a needle reading AF signal 30mV 1 KHz to microphone of 95 on the Set MIC Gain fully clockwise external modulation Set SWR MOD PWR Switch to MOD position meter AM Modulation Set radio to 19 AM TX mode For a needle reading Meter AF signal 30mV 1 KHz to microphone of 95 on the Set MIC Gain fully clo
20. CONTROL SCHEMATIC DIAGRAM APPROVED JAN 20 2003 ITEM Z M LU NO 979 SCHEMATIC DIAGRAM MAIN PCB 42 47 lt 8 014 015 m 25 945 z 2SC1675L aL 5 escis gt 8 m 8 EAM E gt w 2 S PME A S 8 5 Ad AS M 2sco AS 7 RELATE 24 2 7 LS 4 14148 pias fnere n20 53 1N60P 22K 7 102M V VOLUME VR508 SOKA NB ANL 5501
21. E te tae BS 16 5 1 Periodic Inspection idence toda awe Wace iL Sb Le 16 5 2 Fuse Replacement leer A tee a ees vie 16 CHAPTER 6 DIAGRAMS AND PARTS LIST 6 0 PCB Eayout amp Parts list abre 17 979 1 SPECIFICATIONS HS 1 0 GENERAL Model Channels Frequency Range Emission Modes Frequency Control Frequency Tolerance Frequency Stability Operating Temperature Range Microphone Input Voltage Antenna Connector Dimensions Weight 1 1 TRANSMITTER RF Power Output RF Transmit Modes Modulation Spurious Emissions Carrier Suppression Audio Frequency Response Antenna Impedance Output Indicators 1 2 RECEIVER Sensitivity For 10dB S N AM SSB IF Frequency Image Rejection Adjacent Channel Selectivity RF Gain Control Automatic Gain Control AGC Figure Of Merit Squelch Noise Blanker Audio Output Power Audio Frequency Response Built in Speaker External Speaker Not Supplied DX 979 40 26 965 27 405 MHz AM USB LSB Phase Lock Loop PLL synthesizer 0 005 0 001 30 C to 50 C Dynamic PTT 500 0 13 8V DC UHF 50239 7 1 4 W x 9 D x 2 1 4 3 5 lbs 4W USB LSB 12W AM SSB High and Low level Class B Amplitude Modulation AM and SSB 60dB 60dB 300 to 2500 Hz 50 Ohms Meter shows incoming signal strength RF output power SWR and AM Modulation level Transmit LED glows red when trans
22. Galaxy CB Radio Model DX 979 Service Manual Copyright Reserved TABLE OF DX 979 CONTENTS aa eS PAGE CHAPTER 1 SPECIFICATIONS 1 0 GJ NISL 2 1 1 Transmitter Des eee PS dd e be Mug ea tua cp P RR d 2 1 2 aos ica n Im pasos si hU ade M dE des dis 2 CHAPTER 2 OPERATION 2 0 Introductio n joe eM Reh PL ie eed 3 2 1 Control amp Connections ie he ED Ee e 3 2 2 Microphone den iet te sete eee mae eT a 7 2 3 u 5 eS day RR ENTE E See A 7 2 4 Alternate Microphones And Installation 8 CHAPTER 3 CIRCUIT DESCRIPTION 3 0 Introduction 3 LESE hx AR A d ae AERA EE IRE 9 3 1 PEL CitCUlt eos s ee veas e A CUR Ep eR ge 9 3 2 Receiver Circuit yl yaa yaa s puasa lg Se 9 3 3 Transmitter Modulation 9 3 4 Transmitter Amplifier Circuit 1 9 CHAPTER 4 ALIGNMENT 4 0 Required Test Equipment 11 11 4 1 Alignment Procedures ecb aaia ek ERA REOR Ree 11 5 MAINTENANCE 5 0 Preca tions e tne cca eae R
23. ation You are responsible for getting the radio safely to us We suggest using United Parcel Service UPS You must pay to ship the radio to us and we will pay to ship the radio back to you Since we use UPS and they do not deliver to Post Offices boxes please provide us with a street address for the return of your radio Be sure to print clearly We appreciate your choosing a Galaxy radio and we will make every effort to get you back on the air as soon as possible Be sure to visit our web site at www GalaxyRadios com Galaxy ATS979010A July 2003
24. ckwise modulation scale 4 1 3 RECEIVER ALIGNMENT ADJUST ITEM U U T SETTING POINT MEASUREMENT AM Sensitivity Set radio to CH 19 AM RX mode Set RF GAIN Fully Clockwise L2 L3 L5 L6 Audio Output gt 2V L7 L8 L9 L10 S N gt 10 dB Set SQ Fully Counter Clockwise Set VOL Control at 2 o clock Set NB ANL switch to OFF position Set CLARIFIER Control to 12 o clock Connect RF SG to antenna jack Frequency 27 185 MHz luV Mod 30 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 USB Sensitivity Set radio to CH19 USB RX mode Set VOL Control Fully Clockwise RF SG setting 27 186 MHz 0 5uV Mod off LSB Sensitivity Set radio to CH19 LSB RX mode Set VOL Control Fully Clockwise RF SG setting 27 184 MHz 0 5uV Mod off NB Adjust Set radio to CH 18 AM RX mode RF SG setting 27 185 MHz 1000uV Mod off Set NB OFF switch to ON position Connect Multi meter to TP1 D2 cathode AM Squelch Set radio to CH 19 AM RX mode Set SQ Control Fully Clockwise RF SG setting 27 185 MHz 20mV Mod 3090 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 For Balance Between CH 1 and CH 40 Audio Output 2V S N gt 10dB Audio Output 2V S N gt 10dB DC Voltage to max Adjust very slowly squelch just Adjust very slowly squelch just AM S Meter Set radio to CH 1
25. e cause of the trouble before replacing it A fuse rated for more than the transceiver requirement should not be used since it may permanently damage the equipment Damage due to over fusing is not covered by the warranty 1162 6 DIAGRAMS 979 PARTS LIST AAA AA 6 0 GENERAL Information on most electrical and mechanical parts is included in the parts list The reference designators are in alphanumeric order M DX 979 ROTARY SWITCH PCB EPT092920Z Loa 0 J 5i NT 3n CABE 2 ques mm SMD COPPER SIDE COMPONENT SIDE PART LIST DX 979 ROTARY SW P C B REFERENCE NUMBER RANGER PART NUMBER EPT092920Z DESCRIPTION ROTARY SW PCB R207 R210 R218 RCY010004Z CHIP F R 0 0 0 1W R201 RCY013314Z CHIP F R 330 0 1W R202 R203 R204 R205 R206 RCY016814Z CHIP F R 680 2 0 1W R215 RCY014724Z CHIP F R 4 7K 0 1W R221 RCY016824Z CHIP F R 6 8K 0 1W R214 0122347 CHIP F R 22K Q 0 1 W R220 RCY016834Z CHIP F R 68K 0 1W Din A C201 C202 CK1104AB5X CHIP C 0 1uF 50WV D201 D202 D203 D204 D205 D206 D207 D208 D209 D210 D211 D212 D13 D214 D215 D216 D 217 D218 D219 D220 D 226 D227 D228 EDSS00355Y DIODE S M D 188355 D221 D222 D223 D224 D225 EDSS00181Y DIODE S M D 1SS181 TE85L
26. er signal The PLL circuit consists primarily of IC2 IC3 Q25 Q29 and Q28 The PLL circuit is programmed by the rotary channel switch GPS 668 The GPS 668 communicates the correct binary data information to the programmable divider inside of IC3 IC3 then controls the VCO Voltage Controlled Oscillator to oscillate on the correct frequency This signal is fed either into the receiver s first mixer for receive operation or the transmitter s mixer for transmit operation 3 2 RECEIVER CIRCUIT The incoming RF signal comes into the radio via the antenna and into the front end pre amp 17 The RF signal is fed into the mixer circuit of Q18 Q19 and then into the AM IF section of the receiver The signal is then detected by the AM detector and then fed to the audio amplifier section of the receiver and finally out to the speaker 3 3 TRANSMITTER MODULATION CIRCUIT 1 The transmitter modulation circuit modulates the low level RF signal from the PLL exciter circuit with the user s audio voice signal from the microphone The audio from the microphone is then amplified and fed into the transmit amplifier circuit 2 If the transceiver is in the AM mode the AF power amplifier modulates the last RF amplifier which produces a true amplitude modulated RF signal 3 If the transceiver is in the SSB mode the audio signal is mixed with the 10 6975MHz oscillator in IC6 3 4 TRANSMITTER AMPLIFIER CIRCUIT The transmitter takes the basic exciter
27. esigned to maximize night vision while minimizing eye fatigue Therefore it is ideal for switch and control recognition day or night 12 TALKBACK CONTROL Adjust this knob for desired volume of Talkback This is used to monitor your own voice For example you could use this feature to compare different microphones 13 CLARIFIER CONTROL Allows tuning of the receive frequency above or below the channel frequency by up to 1 0KHz Although this control is intended primarily to tune in SSB signals it may be used to optimize AM signals 14 SWR MOD PWR SWITCH This switch controls the function of the meter during the transmit mode In the SWR position the meter indicates the Standing Wave Ratio SWR of your antenna There are no adjustments because the SWR circuit in this radio calibrates itself automatically When the switch is in the position the green scale on the meter indicates your percentage of modulation in the AM mode only They are most accurate when testing at maximum power output When this switch is in PWR position the meter indicates your power output 15 NB ANL CB PA SWITCH When the switch is in the NB ANL position the Noise Blanker NB and Automatic Noise Limiter ANL circuits are activated The Noise Blanker is very effective in eliminating repetitive impulse noise such as ignition interference In the CB position the PA function is disabled and the radio will transmit and receive on the speaker that
28. is connected In the PA position the radio acts as public address amplifier Your voice will come out of the speaker that is plugged into the PA SP jack on the rear panel The radio does not operate when you are in the PA mode 16 MODE SWITCH This control allows you to select one of the following operating modes AM USB LSB 17 RX TX LED This LED is green during receive and red during transmit 18 CHANNEL DISPLAY The channel display indicates the current selected channel 4 Figure 2 2 represents location of following connections This device complies with part 15 of the FCC Rules Operation is subject to the condition that this device does not cause harmful interference Service Manual at www GalaxyRadios com MODEL NO DX 979 FCC ID MEE DX 979 INN 2 13 8 AM SSB 40 Galaxy 7 TRANSCEIVER EL DATE OF MFG SERIAL NO Figure 2 2 Rear Panel 1 ANTENNA This jack accepts a 50 ohm coaxial cable with a PL 259 type plug 2 DC POWER This jack accepts the 13 8V DC power cable with built in fuse The power cord provided with the radio has a black and red wire The black goes to negative and 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 This jack accepts a 4 to 8 ohm 5 watt external speaker When the external speaker is connected to
29. mber Our warranty comes with the radio and remains valid even if you sell the radio to someone else Refurbished radios are distinguised from new radios by using the letter as the first character of the serial number There are no off site Factory Authorized service centers for Galaxy DX models All warranty work must be done at our facility For maximum convenience these radios may be shipped directly to us for repair after obtaining a Repair Authorization Number RAN This RAN may be obtained from our website or by calling our Service Department at 760 480 8800 between 10 00 AM and 4 00 PM Pacific Time The RAN must be written below your return address on the outside of the shipping box Boxes which arrive without an RAN will be refused and the shipping company will return the unopened box to you Be sure to have a pen and paper ready along with the serial number of your radio before calling We will give you the RAN and our shipping address over the phone When you send your radio please include a copy of the sales receipt and a note with a detailed description of the symptoms especially if they are intermittent This will help our technicians locate the problem so we don t waste time sending the radio back and forth If possible please include a daytime phone number in case our technicians have any questions Do not send your bracket power cord or microphone unless we ask you for these items during our phone convers
30. mitter is in operation lt 0 5 uV USB LSB lt 0 25 uV 10 695 MHz Ist IF 455 KHz 2nd IF 50dB 60dB 45dB adjustable for optimum signal reception 100mV for 10dB Change in Audio Output Adjustable threshold less than 0 5uV RF type 2 5W 10 THD 300 to 2500 Hz 8 Ohms 4 Watts 8 Ohms 4 Watts SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 2 979 OPERATION 10 41 42 13 14 15 16 17 18 TALKBACK CLARIFIER PO ur SWR NB ANL USB 5 51 9 4 AN an Li AE 2 3 s ay ore PWR swa SQ MIC DIM PWR LIII 5 e 1 2 4 7 8 9 Figure 2 1 Front Panel 2 0 INTRODUCTION This section explains the basic operating procedures for the DX 979 mobile CB radio 2 1 CONTROLS AND CONNECTIONS 2 1 1 FRONT PANEL Refer to the above Figure 2 1 for the location of the following controls 1 MICROPHONE JACK Used to connect microphone for voice source 2 SQUELCH CONTROL This knob is used to eliminate background noise being heard through the receiver which can be disturbing when no transmissions are being heard through the receiver To use this feature turn the knob fully counterclockwise and then turn clockwise slowly until the background noise is just eliminated Further clockwise rotation will increase the threshold level which a signal must overc
31. ome in order to be heard Only strong signals will be heard at a maximum clockwise setting 3 ON OFF VOLUME CONTROL This knob controls the volume and power to the radio To turn radio on rotate the knob clockwise Turning the knob further will increase the volume of the receiver 4 RF GAIN CONTROL This control is used to reduce the gain of the RF receive amplifier under strong signal conditions 5 MIC GAIN CONTROL Adjusts microphone gain in the transmit PA modes This controls the gain to the extent that full talk power is available several inches away from the microphone In the Public Address PA mode the control functions as the volume control 6 RF POWER CONTROL This control allows the user to adjust RF power output 7 DIMMER CONTROL This knob controls the level of brightness for the faceplate lettering meter lamp and channel display 8 SWR LED This LED lights red when your SWR is higher than about 3 1 This is not an exact indicator of 3 1 SWR but it is an indication that you should check your SWR reading 9 CHANNEL SELECTOR This control is used to select the desired transmit and receive channel 10 FRONT PANEL METER The front panel meter allows the user to monitor incoming signal strength RF output power SWR level and AM modulation level 11 ILLUMINATED FACE PLATE faceplate lettering will fully illuminate to allow the user easy viewing at night This unique solid state backlight is d
32. rol fully clockwise for maximum RF gain 8 Adjust the CLARIFIER control to clarify the SSB signals or to optimize AM signals 2 3 2 PROCEDURE TO TRANSMIT 1 Select the desired channel of transmission 2 Set the MIC GAIN control fully clockwise 3 If the channel is clear depress the push to talk switch on the microphone and speak in a normal voice 2 4 ALTERNATE MICROPHONES AND INSTALLATION For best results the user should select a low impedance dynamic type microphone or a transistorized microphone Transistorized type microphones have a low output impedance characteristic The microphones must be provided with a four lead cable The audio conductor and its shielded lead comprise two of the leads The third lead is for transmit control and the fourth is for receiving control The microphone should provide the functions shown in the schematic below Figure 2 3 4 WIRE MIC CABLE Pin Number Mic Cable Lead Audio Shield Audio Lead Transmit Control Receive Control Figure 2 3 Your Transceiver Microphone Schematic Figure 2 4 Microphone plug and pin numbers viewed from rear of pin receptacle 3 CIRCUIT DX 979 DESCRIPTION S S 3 0 INTRODUCTION This section explains the technical theory of operation for the DX 979 mobile CB radio 3 1 PLL CIRCUIT The Phase Lock Loop PLL circuit is responsible for developing the receiver s first local oscillator signal and the transmitter s excit
33. signal from IC9 of the TX mixer and amplifies it through a series of amplifiers consisting of Q52 Q51 Q49 and Q47 where it is sent out to the antenna connector 938 TE 060 LE SEO MS XXXL BATA 2671 vo ZHNS 69 01 c 1 1 did 350 91 114 421 ZHWOFS OI 91 899 49 2 ANVLOS 291 333308 25 620 zanset 228 829 DIN 610 J 810 10 55 wy 4I WY ZHXSGp 73 XIN NAZAN aX IW 1 EE INY NGAOd 13d 1112412 29V AN 910 79 10 gt 10 4 979 ALIGNMENT F 4 0 REQUIRED TEST EQUIPMENT D DC Power Supply 13 8VDC 10A 6 Frequency Counter 100 MHz RF Wattmeter 10W RF Signal Generator 100 MHz 3 Multi meter Automatic Distortion Meter Automatic Modulation Meter Oscilloscope 50 MHz 5 Audio Signal Generator Sinad Meter 4 1 ALIGNMENT PROCEDURES This transceiver has been aligned at the factory and does not require any adjustments at installation The required test equipment listed are used for
34. the test setup or alignment shown in Figure 4 1 Transmitter Test Setup and Figure 4 2 Receiver Test Setup These test setups are used in part or total during the following adjustments Refer to page 15 for adjustment locations 4 1 1 PLL ALIGNMENT ADJUST ITEM U U T SETTING POINT MEASUREMENT Disconnect short PCB from TP7 TP8 and TP9 Set radio to CH 1 AM RX mode Connect Multi meter to TP2 2 5 VDC 0 1 Set CLARIFIER Control to 12 o clock Connect Oscilloscope to TP3 Adjust for max Connect Frequency Counter to IC3 Pin 8 10 2400MHz 20Hz Set radio to CH 19 AM RX mode Connect Frequency Counter to TP3 16 4900MHz 20Hz Set radio to CH 19 USB RX mode Connect Frequency Counter to TP3 16 4925MHz 20Hz Set radio to CH 19 LSB RX mode Connect Frequency Counter to TP3 16 4875MHz 20Hz TX Offset Set radio to CH 19 LSB TX mode Frequency Connect Frequency Counter to TP3 16 4875MHz 20Hz AM OSC Set radio to CH 19 AM TX mode Connect Frequency Counter to 5 10 6950MHz 10Hz USB OSC Set radio to CH 19 USB TX mode 10 6925MHz 10Hz Connect Frequency Counter to 5 Set VR6 fully clockwise Set radio to CH 19 LSB TX mode Connect 10 6975MHz 10Hz Frequency Counter to 5 Set VR6 back to mid position when finished 11 4 1 2 TRANSMITTER ALIGNMENT ADJUST ITEM U U T SETTING POINT MEASUREMENT BIAS Current Set radio to CH 19 USB TX mode Modulation Off Remove short P
35. this jack the built in speaker will be disabled 5 F C This jack is used to connect the optional Galaxy FC347 six digit frequency counter All connections including DC power are provided to the FC347 through this jack 2 1 3 FREQUENCY CHART CHANNEL CHANNEL FREQUENCY MHz CHANNEL CHANNEL FREQUENCY MHz 2 2 MICROPHONE The receiver and transmitter are controlled by push to talk switch on microphone Press switch and the transmitter is activated release the switch to receive When transmitting hold the microphone two inches from your mouth and speak clearly in a normal voice The radio comes complete with a low impedance 500 ohm dynamic microphone 2 3 OPERATION 2 3 1 PROCEDURE TO RECEIVE 1 Be sure that the power source microphone and antenna are connected to the proper connectors before going to the next step 2 Press the POWER switch to apply power to the radio 3 Set the VOL to a comfortable listening level 4 Set the MODE switch to the desired mode 5 Listen to the background noise from the speaker Turn the SQUELCH knob slowly clockwise until the noise just disappears The SQUELCH is now properly adjusted The receiver will remain quiet until a signal is actually received 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 cont
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