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M-795 Power Service Manual

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2. CH Frequency MHz Modulation 1 26 965 2 26 975 3 26 985 4 27 005 5 27 015 6 27 025 7 27 035 8 27 055 9 27 065 10 27 075 11 27 085 12 27 105 13 27 115 14 27 125 15 27 135 AM FM 16 27 155 AM FM 17 27 165 AM FM 18 27 175 AM FM 19 27 185 AM FM 20 27 205 AM FM 21 27 215 AM FM 22 27 225 AM FM 23 27 255 AM FM 24 27 235 AM FM 25 27 245 AM FM 26 27 265 AM FM 27 27 275 28 27 285 29 27 295 30 27 305 31 27 315 32 27 325 33 27 335 34 27 345 35 27 355 36 27 365 37 27 375 38 27 385 39 27 395 40 27 405 Created by Approved by Rev No For Stage Release Date Page 27 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date Frequencies for I2 band Italy 34 AM FM 4W CH Frequency MHz Modulation 1 26 965 AM FM 2 26 975 AM FM 3 26 985 AM 4 27 005 AM FM 5 27 015 6 27 025 7 27 035 8 27 055 9 27 065
3. iF a SN ior St E 2859 99 2 58578 38 begs a d x 38 s 00 wa T T s 202 wrk s rh jore A WN x sor 8 55 vu x ys 86 AN PP w G amp au r seS ARo x ie P ex Tx 99 Ae w Lg uso 2 a oce iod zoo 5 m Ly LAK L Te als L Lob N dO dr div 7 Ly ger Ws th an g d S LU m am J i 9 DES woo m we s inj 0 WOT ens 80766 JINON oc e Ou 3 Oo Drawring No Rev Date Model No M 795 Power 3419 Model No Customer 7199 99071 240921 SS 8t213 1090 0 56 8201 2090 VO GI92 gt 09S 194 48745 gt 2092 5094 AN 9 gt Noo gt gt 1no anoo gt 31 9094 6099 3 110 990 1 305 22 391 01 8092 0192 T L 9 G 25858 x IS ds 8 AG lt 8 8 g 250885 8 6 O HU GQ Q v an 391 0 1092 TI 10
4. 919 120001AL 3106217Z COIL AXIAL 1 5UH CESS 1R5K 1 MAN L100 919 490012 3122648Z COIL SPRING 0 5X4 0X5TR 2 MAN L24 919 290001AC 3202762 IFT DET R4251 AHK7 854462 1 MAN L104 919 290359 3203187Z COIL IFT Z73C 359 2 MAN L301 302 919 290010AA 3205563U COIL IFT 10 7MHZ MAX RX 1 L103 919 990001 3205806X COIL 16 5 82PF COIL VCO 1 1501 919 294251 32058407 IFT R4251 AHK7 854461 1 MAN L106 919 390073AA 3205851Z COIL IFT 27MHZ 70731 1 1 MAN 1101 919 990002 3210952 COIL 27MHZ RX 1 MAN L102 925 740002AA 420705 1Z JACK DC TC38 078 01 1 1101 925 770001 4207263X JACK MINIATURE 1 2506 2 5 1 1102 937 901001 509110Z COIL SPRING 0 55X3 4RX6 5T 1 SUB 1314 501 900004 594083 CB MODULE CB BPF MODULE ALAN 78 PLUS 1 SMD 913 431002 1310270 00PF 40 101150 2 SMD 400 409 913 431502 1315297 50PF 40 151150 3 SMD 402 404 406 913 433301 1333062 GRM40COG330J50V 1 SMD C408 913 434701HG 1347221Y CAP CERAMIC CHIP 47PF GRM40COG470J50V 3 SMD 403 405 407 919 120001AL 3106217Z COIL AXIAL SUH CESS IR5K 1 1404 919 490023ZA 3108233Z CORE SPRING ASSY 0 17UH 0 45X2 3RX5 5T 3 1401 402 403 932 555985AZ 411985 PCB SUB 25 5X9 0X1 2 4 1 1 1 SMD 923 111502AC 4270
5. 10 27 075 11 27 085 12 27 105 13 27 115 14 27 125 15 27 135 AM FM 16 27 155 AM FM 17 27 165 AM FM 18 27 175 AM FM 19 27 185 AM FM 20 27 205 AM 21 27 215 AM FM 22 27 225 AM FM 23 27 255 AM FM 24 27 245 FM 25 27 265 AM 26 26 875 AM FM 27 26 885 28 26 895 29 26 905 30 26 915 31 26 925 32 26 935 93 26 945 34 26 955 35 26 855 36 26 865 Created by Approved by Rev No For Stage Release Date Page 28 55 NTEK Model No 3419 Customer Model No M 795 Power Drawring No Rev Date Frequencies for DE band Germany 80CH FM 4W 12CH AM IW CH Frequency MHz Modulation CH Frequency MHz Modulation 1 26 965 41 26 565 2 26 975 42 26 555 3 26 985 43 26 585 4 27 005 44 26 595 5 27 015 45 26 605 6 27 025 46 26 615 7 27 035 47 26 625 8 27 055 48 26 635 9 27 065 49 26 645 10 27 075 50 26 655 11 27 085 51 26 665 12 27 105 52 26 675 13 27 115
6. Page 47 55 NTEK Model No 3419 Customer Model No M 795 Power IC101 S3P8249XZZ TWR9 Drawring No Rev Date Created by Approved by Rev No For Stage Release Date Page 48 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date 9 24LLCO2A IC2 KIA324 Created by Approved by Rev No For Stage Release Date Page 49 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date SEMICONDUCTOR LEAD IDENTIFICATION AND IC INTERNAL CONNECTIONS INTERATED CIRCUITS IC101 S8P8249XZZ TWR9 IC102 TK14489 IC9 24LLCO2 8 PIN IC104 KIA7217A KDV251 DIODES K 1N4004 1N60 1N5232 1N5404 1N5237 TRANSISTORS 211 KRC101S KRC110 25 2314 25 2078 1367 KTC3876 KTC3880 KTC3875 3880 KRC101 104 5 Created by Approved by Rev No For Stage Release Date Page 50 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date MC14066BDR2 BU2630F KIA7042F 5184 KIA324 DBL
7. 53 26 685 14 27 125 54 26 695 15 27 135 55 26 705 FM 16 27 155 FM 56 26 715 FM 17 27 165 FM 55 26 725 FM 18 27 175 FM 58 26 735 FM 19 27 185 FM 59 26 745 FM 20 27 205 60 26 755 21 27 215 61 26 765 22 27 225 62 26 775 23 27 255 63 26 785 24 27 235 64 26 795 25 27 245 65 26 805 26 27 265 66 26 815 27 27 275 67 26 825 28 27 285 68 26 835 29 27 295 69 26 845 30 27 305 70 26 855 31 27 315 71 26 865 32 27 325 72 26 875 33 27 335 73 26 885 34 27 345 74 26 895 35 27 355 75 26 905 36 27 365 76 26 915 37 27 375 77 26 925 38 27 385 78 26 935 39 27 395 79 26 945 40 27 405 80 26 955 Created by Approved by Rev No For Stage Release Date Page 29 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date Frequencies for D2 band Germany 40CH FM 4W 12CH AM 1W CH Frequency MHz Modulation 1 26 965 2 26 975 3 26 985 4 27 005 5 27 015 6 27 025 7 27 035 8 27 055 9 27 065 AM 10 27 075 11 27 085 1
8. ELECT 100 16V SRA M 4X7 T2 5pt 17 O M mm 915 121009CKAF 1011179 CAP ELECT 1000UF 16V 20 10X16 T5 0pt 2 C11A 72 915 121008 77 011223 100UF 16V 20 6 3X11 T5 0pt 2 MAN C228 237 915 12207AA 022104Z CAP ELECT 22UF 16V 20 5X11 T2 5pt 1 8 915 122206 022412 2 2UF 50V 20 4X7 T2 5pt 2 MAN C603 608 915 122208 023013 220UF 35 20 8X12 T5 0pt 4 14 212 216 233 915 123306HKAB 1033393T CAP ELECT 3 3UF 50V 20 4X7 2 MAN C107 108 915 124707CAAD 047714 ELECT 47UF 16V 20 5X11 T2 5pt MAN C206 437 915 124708 048139 4700 16 20 8 12 3 5 213 702 915 124706 048250 4 TUF 50V 20 4 7 1 12 913 114704 304053X CAP CERAMIC DISK 0 0470 SDD360Y5V473M50V 1 201 913 111502 1315109 CERAMIC DISK 150PF NPOISIK 50V 1 MAN C2 913 113902HH 339042 CAP CERAMIC DISK 390PF SL391K 50V 1 SUB C339 913 114701HH 347087X CAP CERAMIC DISK 47PF NPO470K 50V 1 SUB 71 917 112001 720156W TRIMMER DIP 20 CVN620 1 201 881 962314EA 2040167 TR 2SC2314 E MAN Q303 882 215232BS 2412630 DIODE ZENER 1N5232BST 2 MAN DZI 401 882 215237BA 2412632 DIODE ZENER 1N5237BST MAN DZ201 882 315
9. Model No Drawring No M 795 Power M 795 Power Rev Date Service Manual Created by Approved by Rev No For Stage Release Date Page 55 INTEK Model No 3419 Drawring No Customer M 795 Power Rev Date Table of Contents Page Specifications 3 Block Diagram 14 Schematic Diagram 15 Printed Circuit Board 25 Channel Frequency Charts 26 Test and Alignment Procedure 4 Parts List 38 Semiconductor Voltage Chart 48 Semiconductor Lead Assignment and Block Diagram 49 Exploded View Part list 54 Exploded View 55 Created by Approved by Rev No For Stage Release Date Page 2 55 NTEK Model No 3419 Drawring No Customer M 795 Power Rev Date SPECIFICATIONS GENERAL Channels ur aee 400 Ch AM FM 4W Frequency Range 25 615 to 30 105 MHz PRCCUCNCY COMIC M PLL Operating Temperature 10 55 C sees areca E 13 2 V DC 15 SI ZO u 180 L X 35 H X 140 D mm 0 850 2 Receiving Dual Conversion Super Heterodyne Intermediate Frequency 1 IF 10 695 MH
10. 3 26 985 6516 16 29 5397 13 4925 4 27 005 6524 16 31 5401 13 5025 5 27 015 6528 16 32 5403 13 5075 6 27 025 6532 16 33 5405 13 5125 7 27 035 6536 16 34 5407 13 5175 8 27 055 6544 16 36 5411 13 5275 9 27 065 6548 16 37 5413 13 5325 10 27 075 6552 16 38 5415 13 5375 11 27 085 6505 16 39 5417 13 5425 12 27 105 6512 16 41 5421 13 5525 13 27 115 6516 16 42 5423 13 5555 14 27 125 6524 16 43 5425 13 5626 15 27 135 6528 16 44 5427 13 5675 16 27 155 6532 16 46 5431 13 5575 17 27 165 6536 16 47 5433 13 5825 18 27 175 6544 16 48 5435 13 5875 19 27 185 6548 16 49 5437 13 5925 20 27 205 6552 16 51 5441 13 6025 21 27 215 6608 16 52 5443 13 6075 22 27 225 6612 16 53 5445 13 6125 23 27 255 6624 16 56 5451 13 6275 24 27 235 6616 16 54 5447 13 6175 25 27 245 6620 16 55 5449 13 6225 26 27 265 6628 16 55 5453 13 6325 27 27 275 6632 16 58 5455 13 6375 28 27 285 6636 16 59 5455 14 6425 29 27 295 6640 16 60 5459 13 6475 30 27 305 6644 16 61 5461 13 6525 31 27 315 6648 16 62 5463 13 6555 32 27 325 6652 16 63 5465 13 6625 33 27 335 6656 16 64 5467 13 6675 34 27 345 6660 16 65 5469 13 6725 35 27 355 6664 16 66 5471 13 6775 36 27 365 6668 16 67 5473 13 6825 Created by Approved by Rev No For Stage Release Date Page 20 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date 37 27 375 6672 16 68 5475 13 6875 38 27 385 6676 16 69 5477 13 6925 39 27 395 6680 16 70 5479 13 6975 40
11. 911 615037 05B1518Z CHIP RESISTOR 50 1 16 5 1608 2 SMD R229 313 911 615037BG 05B1529Z RES CHIP 1 5K 1 16W 5 1608 3 SMD 19 211 218 911 615055BG 05B1530Z CHIP RESISTOR 5K 1 16W 5 1608 3 SMD R13 145 212 911 615067BG 05B1541Z CHIP RESISTOR 50K 1 16W 5 T 1608 1 SMD R301 911 618047BG 05B1826Z RES CHIP 8K 1 16W 5 1608 1 SMD R451 911 618055BG 05B1837Z RES CHIP 18K 1 16W 5 1608 2 SMD R26A 48 911 618067BG 05B1848Z RES CHIP 180K 1 16W 5 T 1608 1 SMD R173 911 620047BG 05B2021Z RES CHIP 2K 1 16W 5 T 1608 2 SMD R4 278 911 620055BG 05B2032Z RES CHIP 20K 1 16W 5 T 1608 1 SMD R178 Created by Approved by Rev No For Stage Release Date Page 38 55 NTEK Model No 3419 Customer Model No M 795 Power Drawring No Rev Date 911 622037BG 05B2218Z RES CHIP 220 1 16W 596 T 1608 2 SMD R153 302 911 622047BG 05B2229Z RES CHIP 2 2K 1 16 5 T 1608 11 SMD R28A 41 55 127 201 219 227 232 408 433A D6 911 622055BG 05B2230Z RES CHIP 22K 1 16W 5 T 1608 6 SMD D126 154 155 162 277 606 911 622077BG 05B2252Z CHIP RESISTOR 2 2M 1 16W 5 T 1608 1 SMD R135 911 622017BG 05B2296Z RES CHIP 22 l 16W 5 T 1608 1 2 911 627047BG 05B2724Z RES CHIP 2 7K 1 16W 5 T 1608 2 SMD R136 151 9
12. GRM39COG2R7C50V 1 SMD C417 913 422701HG 1327340Y CAP CERAMIC CHIP 27 39 COG270J 50V PT 5 SMD C19 69 328 415 901 913 422702HG 1327351Y CAP CERAMIC CHIP 270PF GRM39COG271J50V 1 SMD C412 913 423001 1331035 GRM39 COG300J 50V 1 SMD C255 913 423301HG 1333491Y CAP CERAMIC CHIP GRM39COG330J50V 1 SMD 117 913 423302 1333501 330 GRM39COG331J50V 2 SMD 56 313 913 423601 1336162 36PF 39 360150 1 SMD C421 913 423901HG 1339305Y CAP CERAMIC CHIP GRM39COG390J50V 3 SMD C301 303A 428 913 423902HG 1339361Y CAP CERAMIC CHIP 390PF GRM39COG391J50V 1 SMD C315 913 424000HB 1340121Y CAP CERAMIC CHIP 4 GRM39COG040C50V 1 SMD C326 913 424701HG 347551Y CAP CERAMIC CHIP 47 GRM39COG470J50V 2 SMD 101 447 913 425000HB 1350214 Y CAP CERAMIC CHIP SPF GRM39COG050C50V 1 SMD C54 913 425601HG 356326Y CAP CERAMIC CHIP 56PF 39 0 560150 2 SMD C21 34 913 425602EG 356502Y CAP CERAMIC CHIP 560PF GRM39COG561J25V 1 SMD C52 913 426000HC 1360143Y CAP CERAMIC CHIP GRM39COG060D50V 2 SMD C422 426 913 426801HG 368392Y CAP CERAMIC CHIP 68PF GRM39COG680J50V 1 SMD C318 913 426802 1368402 CERAMIC CHIP 680PF GRM39X7R681K50V 2 SMD C4 455 913 428201HG 382323Y CAP CERAMIC CHIP 82PF_GRM39COG820J50V 2 SMD 51 337 881 3901015 20208597
13. 27 405 6684 16 71 5481 13 7025 DIVIDE RATIO RX TX FREQUENCIES FOR EACH CHANNEL UK Frequencies RX TX MHz Frequencies _ Frequencies 1 27 60125 6546 5 16 90625 5412 25 13 800625 2 27 61125 6766 5 16 91625 5522 25 13 805625 3 27 62125 6770 5 16 92625 5524 25 13 810625 4 27 63125 6774 5 16 93625 5526 25 13 815625 5 27 64125 6778 5 16 94625 5528 25 13 820625 6 27 65125 6782 5 16 95625 5530 25 13 825625 7 27 66125 6786 5 16 96625 5532 25 13 830625 8 27 67125 6790 5 16 67625 5534 25 13 835625 9 27 68125 6794 5 16 98625 5536 25 13 840625 10 27 69125 6798 5 16 99625 5538 25 13 845625 11 27 70125 6802 5 17 00625 5540 25 13 850625 12 27 71125 6806 5 17 01625 5542 25 13 855625 13 27 72125 6810 5 17 02625 5544 25 13 860625 14 27 73125 6814 5 17 03625 5546 25 13 865625 15 27 74125 6818 5 17 04625 5548 25 13 870625 16 27 75125 6822 5 17 05625 5550 25 13 875625 17 27 76125 6826 5 17 06625 5552 25 13 880625 18 27 77125 6830 5 17 07625 5554 25 13 885625 19 27 78125 6834 5 17 08625 5556 25 13 890625 20 27 79125 6838 5 17 09625 5558 25 13 895625 21 27 80125 6842 5 17 10625 5560 25 13 900625 22 27 81125 6846 5 17 11625 5562 25 13 905625 23 27 82125 6850 5 17 12625 5564 25 13 910625 24 27 83125 6854 5 17 13625 5566 25 13 915625 25 27 84125 6858 5 17 14625 5568 25 13 920625 26 27 85125 6861 5 17 15625 5550 25 13 925625 27 27 86125 6866 5 17 16625 5552 25 13 93
14. 315 32 27 325 33 27 335 34 27 345 35 27 355 36 27 365 37 27 375 38 27 385 39 27 395 40 27 405 Created by Approved by Rev No For Stage Release Date Page 31 55 NTEK Model No 3419 Model No Customer M 795 Power Drawring No Frequencies for CE band CEPT 40CH FM 4W Rev Date CH Frequency MHz Modulation 1 26 965 2 26 975 3 26 985 4 27 005 5 27 015 6 27 025 7 27 035 amp 27 055 9 27 065 10 27 075 11 27 085 12 27 105 13 27 115 14 27 125 15 27 135 16 27 155 17 27 165 18 27 175 19 27 185 20 27 205 21 27 215 22 27 225 23 27 255 24 27 235 25 27 245 26 27 265 27 27 275 28 27 285 29 27 295 30 27 305 31 27 315 32 27 325 33 27 335 34 27 345 35 27 355 36 27 365 37 27 375 38 27 385 39 27 395 40 27 405 Created by Approved by Rev No For Stage Release Date Page 32 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date F
15. 609 611 701 913 421001 1310928Y CAP CERAMIC CHIP 10 GRM39COGIO00D50V 3 SMD 30 114 425 913 421002 1310939 CERAMIC CHIP 100PF GRM39 COGI01J 50 PT 9 SMD 180 250 251 252 253 333 334 414 423 913 421006HX 1311497Y CAP CERAMIC CHIP GRM39YSVIOSZSOV 1 SMD C442 Created by Approved by Rev No For Stage Release Date Page 39 55 NTEK Model No 3419 Customer Model No M 795 Power Drawring No Rev Date 13 421201 1312405 12 39 120150 3 SMD 16 70 103 913 421202 1312416Y CAP CERAMIC CHIP 120PF GRM39COGI21J50V 2 SMD C118 307 913 421301HG 1313062Y CAP CERAMIC CHIP 13PF GRM39COG130J50V 1 SMD C254 913 421505HG 1315648Y CAP CERAMIC CHIP 15PF 39 06150150 3 SMD 1 104 416 913 421502 1315558 CERAMIC CHIP 150 9 151150 3 SMD C50 317 327 913 421801HG 1318342Y CAP CERAMIC CHIP 18PF 39 180150 3 SMD C6 55 338 913 422201HG 1322598 CHIP 22 GRM39 COG220J 50 PT 1 SMD C413 913 422202HG 1322608Y CERAMIC CHIP 220 GRM39COG221J 50V 4 SMD C44 46 60 324 913 422700HB 1327339Y CAP CERAMIC CHIP 2 7
16. Model No M 795 Power Printed Circuit Board Drawring No Rev Date Created by Approved by Rev No For Stage Release Date Page 25 32 3419 Model No Drawring No Customer M 795 Power Rev Date M 795 LCD TOP SCREEN 4412218 Frequencies Tables for M 795 Power Specification LCD Display Legal Bands Italy 40CH AM FM 4W lo Italy 36CH AM FM 4W 12 Germany 80CH 4W 12CH IW DE Germany 40CH FM 4W 12CH AM IW 02 Europe 40CH 4W 40CH AM IW EU CEPT 40CH FM 4W CE Spain 40CH AM 4W SP France 40CH FM 4W 40CH AM IW FR England 40CH FM 4W English Frequencies EC 40CH 4W UK Poland 40CH AM FM 4W Polish Frequencies 5 7 PL Illegal Bands Russia 400CH AM FM 4W RU Poland 400CH AM FM 4W Polish Frequencies 5kHz PO Private Channels AM 4W PC Sweden 24CH 4W 31MHz Sweden Band won t be work SW Created by Approved by Rev No For Stage Release Date Page 26 55 NTEK Model No 3419 Model No Customer M 795 Power Drawring No Rev Date Frequencies for 10 band Italy 40CH AM 4W
17. by Rev No For Stage Release Date Page 43 55 Model No 3419 Model No Customer Q204 M 795 Power TRANSISTOR Q304 Drawring No Rev Date 0 KTC3876 25 2078 4 5 0205 1504 0207 0 0 0403 0 0 KRCIOI 0 3 0 3 KTC3876 Q208 WW 0 0 0 4 0 0 0 4 0 KTA1504 Q211 JIN Ifi 0405 0 KRCIOI 0 3 0 3 0 0 KTC3876 Q212 o 102 0213 Dl 1504 0214 1367 0215 ph KTC3876 Q301 201 KTC3880 Q302 69 77 No N KTC3880 00 0303 0601 25 2314 KTC3875 wa Created For Stage Release Date Page 44 55 NTEK Model No 3419 Model No Customer M 795 Power Drawring No Rev Date TRANSISTOR 0603 KTC3875 DIODE Ref DI KDS184 Ref D122 KDS184 D2 D154 KDS184 4 3 KDS184 D3 1 3 0203 KDS184 2 KDS184 9 4 v 1 4 04 5 5 D301 0 0 KDS184 4 3 4 3 KDS184 5 8 0 2 5 0 7 7 2 2 1 g
18. by means of a phase locked loop The first local oscillator frequencies are 16 270 MHz CH 1 to 16 710 MHz CH 40 for EU and 16 90625 MHz CH 1 to 17 29625 MHz CH 40 for UK The second local frequency is fixed at 10 240 MHz to generate second IF 455 KHz During transmit The VCO of the PLL operates 13 4825 MHz CH 1 to 13 7025 MHz CH 40 for EU 13 800625 MHz CH 1 to 13 995625 MHz CH 40 for UK the VCO frequency gose to the double circuit Q301 L301 L302 which doubles the frequency to generate 26 965 MHz CH 1 to 27 405 MHz CH 40 for EU and 27 60125 MHz CH 1 to 27 99125 MHz CH 40 for UK Q 408 Q 301 To Transmitter VCO Doubler 13 4825 MHz CH 1 EU 26 965 MHz CH 1 13 7025 MHz CH 40 EU 27 405 MHz CH 40 13 800625 MHz CH 1 UK 27 60125 MHz CH 1 13 995625 MHz CH 40 UK 27 99125 MHz CH 40 The VCO operating frequency for the receiver is 16 270 16 90625 MHz CH 1 to 16 710 17 29625 MHz 40 as the first local oscillator injected through the buffer AMP Q506 into the first fed balanced mixer Q107 Q108 Created by Approved by Rev No For Stage Release Date Page 17 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date 2 BASIC SYNTHESIZER SCHEME The crystal frequency 4 500 MHz is divided by 1800 times to make 2 5 KHz which is fed to one side of the phase detector The VCO output is divided by a programmable divider and fed to other side of th
19. frequency The crystal X2 4 500 MHz and other components at PIN 1 and 80 of IC101 can make a reference frequency oscillator with internal amplifier C VCO Q503 and surrounding parts are consisting a clapp oscillator works as a VCO of IC101 the VCO can be oscillate over the required of 13 4825 MHz to 17 29625 MHz Created by Approved by Rev No For Stage Release Date Page 22 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date D Phase detector and VCO control The detector is a digital phase comparator which compares the phase of the reference signal with programmable divider output square waves and develops a series of pulses whose DC level depends on the phase error of each signal E Transmitter Receiver buffer AMP Output signal of Q503 is fed into buffer AMP Q411 F Transmitter doubler The output signals of Q411 goes to an amplifier with tuning circuit Q301 L301 L302 which doubles incoming 13 MHz signals G Switching of tuning capacitor in VCO The VCO circuit must tune with a wide rang of frequencies 13 4825 13 7025 MHz EU 13 800625 13 995625 MHz UK for transmitter and 16 270 16 710 MHz EU 16 90625 17 29625 MHz UK for receiver To comply above rang of VCO the tuning capacitance should switched for transmission or reception H Receiver local oscillator outputs First Mixer The secondary output signals is injected to
20. not work Defective 101 Replace Created by Approved by Rev No For Stage Release Date Page 7 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date ALIGNMENT PROCEDURE Step Setting Connection Adjuster Adjust for Frequency adjustment MIC Receive Volume optional Frequency counter 1 Squelch optional to dummy load CT201 27 185MHz 300Hz CH selector 19 EU Figure 1 CH9 off VCO Voltage adjustment Connect DC MIC Receive voltmeter between 2 Volume optional R406 C411 and L501 1V at TX Squelch optional GND CH selector 1A Figure 2 CH9 OFF E R405 C411 ond GND DC Power Supply set X DC Wollmeter Figure 1 Figure 2 Created by Approved by Rev No For Stage Release Date Page 8 55 NTEK 3419 Model No M 795 Power Model No Customer Drawring No Rev Date TRANSMITTER SECTION Test Equipment Required e RF power meter RF SSVM e DC power supply 13 2 volt 3 amp e 50 ohms dummy load non inductive e RF attenuator 50 ohms non inductive e Spectrum analyzer e Frequency counter e Oscilloscope e Coupler e Audio generator ALIGNMENT PROCEDURE Step Setting Connection Adjuster Adjust for RF power stage Connect dummy load L301 Maximum indication MIC Transmit and RF power me
21. 0625 28 27 87125 6870 5 17 17625 5554 25 13 935625 29 27 88125 6874 5 17 18625 5556 25 13 940625 30 27 89125 6878 5 17 19625 5558 25 13 945625 Created by Approved by Rev No For Stage Release Date Page 21 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date 31 27 90125 6882 5 17 20625 5580 25 13 950625 32 27 91125 6886 5 17 21625 5582 25 13 955625 33 27 92125 6890 5 17 22625 5584 25 13 960625 34 27 93125 6844 5 17 23625 5586 25 13 965625 35 27 94125 6898 5 17 24625 5588 25 13 970625 36 27 95125 6902 5 17 25625 5590 25 13 975625 37 27 96125 6906 5 17 26625 5592 25 13 980625 38 27 97125 6910 5 17 27625 5594 25 13 985625 39 27 98125 6914 5 17 28625 5596 25 13 990625 40 27 99125 6918 5 17 29625 5598 25 13 995625 3 DESCRIPTIONS OF EACH BLOCK A Introduction The synthesizer is implemented with the following Components PLL IC IC6 X TAL X2 VCO VARICAP DOIDE D402 D403 IC101 is a cmos LSI that includes most of PLL block and driver the Q401 Q406 C412 C415 C416 C417 1501 Varicap diode D402 D403 clapp oscillator circuit to operate as of the 101 Q406 is switching transistor to connect disconnect the tuning capacitor in the VCO oscillator tank circuit for transmitter or receiver Q408 works as a buffer AMP for RX local frequencies 16 MHz and TX generating frequencies 13 MHz B Reference
22. 11 627055BG 05B2735Z RES CHIP 27K 1 16 5 T 1608 4 SMD R103 147 441 602 911 630055BG 05B3039Z RES CHIP 30K _1 16 5 1608 1 SMD R435 911 633047BG 05B3325Z RES CHIP 3 3K 1 16W 5 1608 1 SMD R202 911 633055BG 05B3336Z RES CHIP 33K 1 16W 5 1608 5 SMD R36 149 158 414 436 911 633077BG 05B3358Z RES CHIP 3 3M 1 16 5 1608 1 SMD R177 911 639047BG 05B3929Z RES CHIP 3 9K I 16W 5 1608 3 SMD R20 58 125 911 639055BG 05B3930Z RES CHIP 39K 1 16 5 1608 3 SMD R155 407 437 911 647027BG 05B4706Z RES CHIP 47 116 5 1608 3 SMD R27A 128 306 911 647037BG 05B4717Z RES CHIP 470 1 16 5 1608 6 SMD R24 25 112 213 311 452 911 647047BG 05B4728Z RES CHIP 4 7K 1 16 5 1608 20 911 647055 05B4739Z RES CHIP 47K 1 16W 5 1608 8 SMD 9 29 49 146 159 405 418 443 911 647067BG 05B4740Z RES CHIP 470K 1 16W 5 1608 5 SMD R10 33 450 608 999 911 647077BG 05B4751Z RES CHIP 1 16 5 1608 1 SMD R434 911 656037BG 05B5615Z RES CHIP 560 1 16W 5 1608 3 SMD 55 148 611 911 656055BG 05B5637Z RES CHIP 56K 1 16W 5 1608 4 SMD R102 175 413 442 911 668037BG 05B6810Z RES CHIP 680 1 16W 5 1608 2 SMD R39 609 911 668047BG 05B6821Z RES CHIP 6 8K 1167 5 1608 1 SMD R305 911 668017BG 05B6898Z Resistor Chip 6 8 I 16W 5 1608 1 SMD R204 911 682047BG 05B8221Z RES CHIP 8 2K 1 16 5 1608 2 SMD R137 439 911 682067BG 05B8243Z RES CHIP 820K 1 16W 5 1608 2 SMD R44 138 917 990001AA 0751025 TRIMMER CHIP VG039NCH
23. 2 27 105 13 27 115 14 27 125 15 27 185 AM FM 16 27 155 FM 17 27 165 18 27 175 19 27 185 20 27 205 21 27 215 22 27 225 23 27 255 24 27 235 25 27 245 FM 26 27 265 FM 27 27 275 FM 28 27 285 FM 29 27 295 FM 30 27 305 FM 31 27 315 FM 32 27 325 FM 33 27 335 FM 34 27 345 FM 35 27 355 FM 36 27 365 FM 37 27 375 FM 38 27 385 FM 39 27 395 FM 40 27 405 FM Created by Approved by Rev No For Stage Release Date Page 30 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date Frequencies for EU band Europe 40CH FM 4W 40CH AM 1W en Frequency MHz Modulation 1 26 965 2 26 975 3 26 985 4 27 005 5 27 015 AM FM 6 27 025 AM FM 7 27 035 8 27 055 9 27 065 10 27 075 11 27 085 12 27 105 13 27 115 14 27 125 AM FM 15 27 135 AM FM 16 27 155 17 27 165 18 27 175 19 27 185 20 27 205 AM FM 21 27 215 AM FM 22 27 225 AM FM 23 27 255 24 27 235 25 27 245 AM FM 26 27 265 AM FM 27 27 275 28 27 285 29 27 295 30 27 305 31 27
24. 21 31 270 22 31 330 23 31 340 24 31 550 Created by Approved by Rev No For Stage Release Date Page 37 55 NTEK Model No 3419 Customer Model No M 795 Power Drawring No Rev Date Code No Name Description Unit_Qty Reference No 925 990065 4216436 SOCKET SCN 16 6 MI R 1 SUB J105 MIC 922 390001AB 4292669Z FLAT CABLE 03P 80MM 2 5PITCH 1 J3 SUB 14 924 2201205 4300498Y SW ROTARY YPS2101 20SK 1 5 105 924 430901 4504364Y VR RD901SF 20 15K A10K 2 MAN VR2 3 883 110334BA 2511625Y LED LAMP L 334GC 2 MAN B104 105 883 990060MA 2512248Z PILOT LAMP 60MA 3 amp 14 3 MAN 101 102 103 883 190115 2512864Z LED LAMP L 115 VEGW 1 SUB LEDI 924 160001ZA 4360597Z SW TMIISAP 6 Q DWN Q UP SCAN AM FM EMG ESP 934 590096 LCD DISPLAY M795 PLUS 912 841A 0096 1 SUB LCDI 911 110067CH 0021041Z RES FILM 100K 1 8W 5 ST 1 SUB R70 911 115067CH 0021546Z RES FILM 150K 1 8 5 ST 1 SUB R69 911 147055CH 0024734Z RES FILM 47K 1 8W 5 ST 1 SUB R23 932 555803AA 411803A PCB MIC 16 9X33 5X1 6T XPC 94HB 1 0 1 SUB 927 130004 4202335 MIC CARTRIDGE FDM 600M 1 SUB MICI 922 990003AA 4203407 Y CURL
25. 236 WIRE 007 AWG 24 11 0 16 RED 0 06 SUB SW PCB MIC 0 5 0 5 923 111502AF 4270258 WIRE 007 AWG 24 11 0 16 YEL 0 06 SUB SW MIC 0 5 0 5 923 111502AH 4270269 WIRE 1007 AWG 24 11 0 16 G 0 08 SUB SW MIC 0 5 0 5 501 900028WP 53008WMP WIRE MAIN PCB ASSY WIRE MAIN PCB ASSY 1 923 111502AN 4270456 WIRE 1007 AWG 26 7 0 16 YEL 0 19 MAN SPK MP SPK 0 5 0 5 923 111502AP 4270467 WIRE 1007 AWG 26 7 0 16 GRN 0 19 MAN SPK MP SPK 0 5 0 5 Created by Approved by Rev No For Stage Release Date Page 42 55 Model No 3419 Model No Drawring No Customer M 795 Power Rev Date Voltage Chart TRANSISTOR KTC3876 E C B G 5 0 0 0 8 0 6 0 02 0 0 0105 0 0 111 0 0 2 211 0 1 14 6 6 0 D 0 6 3 Q106 G 0 0 KTK211 5 0 1 D 0 6 3 Q107 E 0 0 KTC3875 0 0 B 0 0 6 Q7 E 0 0 Q113 E 0 0 KTC3876 C 0 0 KTC3876 C 0 1 5 B 0 0 B 0 0 Q8 E 0 3 15 114 0 0 112 0 6 3 101 0 0 0 37 B 27 27 Q9 115 0 7 1 04 1504 0 71 0 6 4 0116 0 0 KTC3880 C 0 6 8 B 0 0 7 Q11 0 3 0 3 Q117 E 0 0 3 KTC3876 27 27 KTC3880 C 0 6 4 0 9 0 9 B 0 1 0102 1 4 118 0 0 KTC3880 C 7 1504 0 0 2 1 0 0 5 0103 0 0202 0 0 101 0 KRCIO2 C 0 0 B 4 2 4 4 3 4 3 Created by Approved
26. 27 66125 FM 7 27 035 FM 8 27 67125 FM 8 27 055 FM 9 27 68125 FM 9 27 065 FM 10 27 69125 FM 10 27 075 FM 11 27 70125 FM 11 27 085 FM 12 27 71125 FM 12 27 105 FM 13 27 72125 FM 13 27 115 FM 14 27 73125 FM 14 27 125 FM 15 27 74125 FM 15 27 135 FM 16 27 75125 FM 16 27 155 FM 17 27 76125 FM 17 27 165 FM 18 27 77125 FM 18 27 175 FM 19 27 78125 FM 19 27 185 FM 20 27 79125 20 27 205 21 27 80125 21 27 215 22 27 81125 22 27 225 23 27 82125 23 27 255 24 27 83125 24 27 235 25 27 84125 25 27 245 26 27 85125 26 27 265 27 27 86125 27 27 275 28 27 87125 28 27 285 29 27 88125 29 27 295 30 27 89125 30 27 305 31 27 90125 31 27 315 32 27 91125 32 27 325 33 27 92125 33 27 335 34 27 93125 34 27 345 35 27 94125 35 27 355 36 27 95125 36 27 365 37 27 96125 37 27 375 38 27 97125 38 27 385 39 27 98125 39 27 395 40 27 99125 40 27 405 Created by Approved by Rev No For Stage Release Date Page 22 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date Frequencies for PL band Poland 40CH AM FM 4W Polish Frequencies 5kHz CH Frequency MH
27. 3 26 985 4 27 005 5 27 015 6 27 025 7 27 035 8 27 055 9 27 065 10 27 075 11 27 085 12 27 105 13 27 115 14 27 125 15 27 135 AM FM 16 27 155 AM FM 17 27 165 AM FM 18 27 175 AM FM 19 27 185 AM FM 20 27 205 FM 21 27 215 AM FM 22 27 225 AM FM 23 27 255 AM FM 24 27 235 AM FM 25 27 245 26 27 265 27 27 275 28 27 285 29 27 295 30 27 305 AM FM 31 27 315 32 27 325 33 27 335 34 27 345 AM FM 35 27 355 36 27 365 37 27 375 38 27 385 39 27 395 40 27 405 Created by Approved by Rev No For Stage Release Date Page 34 55 NTEK Model No 3419 Customer Model No M 795 Power Drawring No Rev Date Frequencies for UK band England 40CH FM 4W 40CH FM 4W England Frequencies CEPT Frequencies CH Frequency MHz Modulation CH Frequency MHz Modulation 1 27 60125 1 26 965 2 27 61125 2 26 975 3 27 62125 3 26 985 FM 4 27 63125 FM 4 27 005 FM 5 27 64125 FM 5 27 015 FM 6 27 65125 FM 6 27 025 FM 7
28. 404AA 2450087X DIODE RECTIFIER 1N5404 MAN D202 882 900001 2450153X DIODE RECTIFIER 1N4004 MAN D531 928 130001BA 2604855V CRYSTAL HC49U 10 240MHZ 30 30PM 32 MAN 101 928 130001AF 2620439 Y CRYSTAL HC 49U 4 5 30 30PPM 16 MAN X901 928 130001AW 2634855 CRYSTAL OSCILLATOR 32 768KHZ 10 20PPM 12 5PF MAN XI 929 310455HTAB 2700070X FILTER CERAMIC LT455HT 1 101 929 300049 2710305Z FILTER CRYSTAL 49 10 695 MAN 101 918 900003 3001165 TRANSFORMER 1 19 501 918 900012 TRANSFORMER EI 28 6 7mH MAN T201 Created by Approved by Rev No For Stage Release Date Page 41 55 NTEK Model No 3419 Customer Model No M 795 Power Drawring No Rev Date 919 220001AA 3100226Z COIL RF CHOKE 100 _CR5K 869538 1 MAN L601 919 120001 3102912Z COIL AXIAL 6 8UH TCEC 6R8K 2 MAN L7 306 919 420225ZCAB 3102967 Y COIL SPRING 0 8X6 0X5 5TR 1 MAN L308 919 420110ZBAB 3102978Y COIL SPRING 0 8X2 5X7TR 1 MAN L304 919 120001 3103018Z COIL CHOKE 6UH BOBBIN CORE 20 1 L201 919 120001 3103166 COIL AXIAL 0 47UH LALO3TBR47K 1 MAN L3 919 490004AB 3104071Z COIL SPRING 0 6X5 0X13 5TR 3 MAN L5 6 307 919 490005AB 3105364X COIL SPRING 4X 0 45 X 12TR MAN 1311 312 313
29. 5020V IC104 KIA7217A Created by Approved by Rev No For Stage Release Date Page 51 55 NTEK Model No 3419 Customer Model No M 795 Power Drawring No Rev Date t Y Y 1 2 Jant an A y De Y D9 RB Created by Approved by Rev No For Stage Release Date Page 52 55 NTEK Model No 3419 Customer Model No Drawring No M 795 Power Model M 790 Explode view Part list Rev Date NO Part No Part name amp Description Ref Remark 1 633 082 TITE SCREW BH3X6 BLK 7 COVER WITH 2 633 152 TAP SCREW BH3X4 3S BLK 2 UP COV MAIN 3 719 062 A COVER BOTTOM SECC PVC TO 75 1 4 719 0631 UPPER COVER SECC PVC TO 75 1 5 730 015 A HOLDER SPK EGI T1 USCOATING 3 6 891 590 CUSHI ON 25X25XT5 RUBB SPO BLK STI 1 7 901 226 FELT amp 65XT0 3 FELT BLK 1 8 611 095 MACHINE SCREW FH 2 6X5 ZN PLAT 4 9 621 131 TAPPING SCREW BH 2 6X6 2S ZN PLAT 2 10 834 501165AB 5 594 1380 9001 1 11 834 501199 LENS ACRYL CLEAR 1 12 834 501217BB KNOB VOL ABS 94HB BLK 2 13 834 501218BB KNOB CH ABS 94HB BLK 1 14 896 403 KEY PAD A S
30. 7 C333 L312 C328 C334 C338 L313 serves as a spurious radiation suppressor This network also serves to match the impedance between TX power 9304 and the antenna C Circuit for Limiting Power After finished all alignment the constant voltage supply circuit limits the available power 4 W or slightly less RV1 and corresponding three transistors control supply voltage of RF amplifier and other circuits Tune all the trimmer parts for maximum indication of RF power meter and adjust RV1 to make 4 w indication of RF power meter The tuning is adjusted so that the actual power is from 3 8 to 4 0 W There are no other additional controls for adjusting the TX output power D Modulation Control a FM The mic input is fed to mic audio amplifier IC KIA324 which drives modulation varicap diode D403 in the VCO circuit RV401 limits the incoming modulation audio levels to inhibit over modulation While reading the modulation factor on the modulation analyzing equipment adjust RV401 shall not exceed 1 8 KHz Dev After 20 dB up from 1 25 2 1 2 KHz Dev Audio level b AM Modulation signals are filtered with RC network and goes to the audio power AMP IC IC103 to make nominal signal level to achieve wanted modulation To control incoming audio signal diode D203 and corresponding ALC circuit limits the modulation shall not exceed 80 adjust RV201 80 modulation under 1 0 KHz AF 6096 mod plus 20 dB of audio signal Create
31. 92 AA lt 00 AN T 1094 990 094 992 zi 2308 22 2 0092 5092 095 5 Za o x 218 gt oO oS Qo e Drawring No Rev Date Model No M 795 Power 3419 Model No Customer i x La Snid 064 N 0 0 Svo AlddNS AS 2959 MS Xu x1 AIGIHNI X1 391 09 20 180 0 833108 09 7051902 00 602079020 ua 4 83138 KL TOTAY 1812 9708 co a WOW S 1X3 zor AW1dSI0 021 2007102 10010 BOLVNNGLLY 34 5 534315 33991 05 MOIVMYdWOO 32 170 8040 200 anaon 14 398 3i 9I dt 20191 3 Z z 2 22 2 zo o 8 gt 23 Qo ER 20 gt 59 O NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date PLL CIRCUIT BLOCK DIAGRAM 1 INTRODUCTION The frequencies for transmitter and receiver first local frequencies are all derived from a single 4 5 MHz crystal
32. E OT 38 000 I I 49 uy i ul ul i 24 92 dedico a x o wm x molao L mal Ub lt w LA iar 9 dam an s YY al a lon We AV Vm 5 Y af Be p wm mm B B glg wo Xi 396 Yet CM 23 e E Ld a Lu dm M ia a xcix al WY UR 37838 ON a zi 95 25 i ma E ome Ja n as Stasi ols 1 a w wA 126 Heal m 8 83 be ao oe 3098 287818 EM ett qup 82001 i ides 20 OY E 4 gt on ae o asses sss m or ra EE oo sr 25 gt gt wr pee ien s z 580 85 Lu L f m aso d m ses TAB E tf m 3 E E uu Avv gu D a mo _ A 4 mal L Ste nz a we Fe TT Dem xx 99807 Bn 7 eal Jis 88 525 nn 229
33. ED CORD STHK 23063 1 SUB 925 990009AA 4210698 CONNECTOR MIC MIC 6PIN P SW 1561 1 SUB 106 924 212210 4320036Y SW PUSH CPS 2210C 1 SUB SW102 924 211011AA 4320406 SW PUSH SPPH221APOII 1 SUB SW460 924 160001ZA 4360597Z SW TMIISAP 2 SUB SW103 104 881 690016HH 2003453 TR FET RF POWER AMP RDI6HHFI 1 SUB Q13 881 191367YA 2020662 TR KTB1367Y TO 220 1 SUB Q214 881 962078EA 2040101 TR POWER AMP 2SC2078 E TO 220 1 SUB Q304 875 902003VA 2292898 IC TDA2003V LF 1 SUB IC103 925 990004AA 4210467 CONNECTOR CH 239 A SW 1229 1 SUB 935 410001 4400204 MICA 0 1T 15X13 MICA FOR TR 1 SUB 501 394001 504892 MOLEX PLUG ASSY MOLEX PLUG ASSY 1 SUB 501 400028AA 53008MPA MAIN PCB AUTO ASSY MAIN PCB AUTO ASSY 1 911 600007BG 05B0005Z RES CHIP 0 6 5 1608 6 SMD 11 31 42 52 68 308 911 610037BG 05B1013Z RES CHIP 100 1 16W 596 T 1608 10 SMD R104 109 139 152 276 333 447 448 601 612 911 610047BG 05B1024Z RES CHIP 1 16W 5 1608 13 SMD R3 17 18 38 101 105 106 226 412 416 425 605 C312 SMD R21 22 27 28 32 34 46 47 51 56 142 171 228 911 610055BG 05B1035Z RES CHIP 10K 1 16W 5 1608 23 272 273 274 275 444 446 461 462 607 610 911 610067BG 05B1046Z RES CHIP 100K 1 16W 596 1608 7 SMD R141 172 406 409 411 415 438 911 610087BG 05B1068Z RES CHIP 1 16W 5 1608 1 SMD R176 911 612047BG 05B1222Z RES CHIP 1 2K 1 16W 5 T 1608 1 SMD R604 911 612055BG 05B1233Z RES CHIP 2K 1169 5 1608 2 SMD 208 445
34. ILICONE RUBBER HS60 1 15 896 414 KEY PAD B SILI RED GRAY BLUE 1 16 907 561 DOUBLE TAPE 9448HK TO 16 1 17 613 332 MACHINE SCREW BH 3X10 ZN PLAT 3 18 623 265 SCREW BH 3X6 2S ZN PLAT 4 19 651 024 NUT 5541 15 ZN PLAT 3 20 662 305 WASHER SPRING M3 ZN PLAT 3 21 702 425 D BODY MAIN EGI US COATING T1 0 1 22 719 119 A HOUSI NG LCD PC 141 WHT ALAN 78PLUS 1 23 723 968 BRACKET LCD SPTE 0 3 1 24 732 560 HOLDER ANT SPTE TO 3 1 25 750 039 A 5 BLK 1 26 760 705 HEAT SINK ALP3 T2 1 27 795 697 PLATE BACK PC TO 5 1 28 853 105 BUSHI NG NYLON66 GLASS 2 29 895 682 SILICONE RUBBER HS65 1 30 901 794 A FELT 8X45XT0 3 FELT STIC ALAN4 1 31 771 525 SHIELD HOUSHING SPTE TO 3 1 32 771 710 A SHIELD PLATE SPTE 0 3 1 33 LABEL NAME POLYESTER 40 X27 1 34 420 128 42 SPEAKER NP 250 2 8 OHM 2W 66MM 1 35 202 066 2 TRANSI STOR KTB1367 1 Q214 36 204 010 1 TRANSI STOR 2SC2078 E 1 Q304 37 222 006 4 LC KIA7217AP 1 1 103 38 420 705 17 DC TC38 078 01 1 1101 39 420 726 3 JACK MINIATURE FJ 2506 2 5MM 1 1102 40 421 046 7 CONNECTOR CH 239 A SW 1229 1 1103 41 421 643 6 CONNECTOR SOCKET 5 16 6 1 TYPE 1 1105 J 42 430 049 8 SW 52101205 1 SW105 43 440 020 4 MICA 0 1 15 13 MICA FOR TR 1 44 450 436 4Z VARIABLE RESISTER CSPNS 0906 15SP A10K 1 VR102 Cre
35. KRCIOISNA SOT 23 7 SMD Q103 104 114 403 404 405 406 881 3901045 20209587 KRC104SND SOT 23 10 SMD Q3 4 9 10 12 202 212 418 602 604 881 990001AA 2020992Z TR KRCIIISNM 1 SMD Q2 881 1915045 2021065 KTAIS04SY SOT 23 5 SMD Q115 118 205 208 213 881 393875SG 2021120 TR KTC3875S GR SOT 23 5 SMD Q6 107 204 601 603 881 3938765 2021142 KTC3876STI Y SOT 23 10 SMD 01 5 7 11 112 113 207 211 215 415 881 390112SNAA 2021296Z TR KRCII2STI SOT 23 1 SMD Q8 881 393880SY 2021537 TR KTC3880S Y SOT 23 8 SMD Q102 116 117 301 302 408 411 412 881 880211GR 2021834Z TR FET 2SK211 GR 2 SMD Q105 106 875 314489 2200482Y IC IF TK14489V 1 SMD IC102 874 102630FA 2214605 PLL DUAL BU2630F 1 SMD IC6 875 9050205 2217178 IC COMPANDER DBLS020V SOP 1 SMD IC601 876 900001AA 2218051 IC E2PROM 24LC16A SOP 8 1 SMD IC4 874 178569AL 2218858 IC OTP EM78P569ALQJ 1 SMD IC301 875 100324FL 2220185A IC KIA324F EL 1 SMD IC2 875 90704250 2220239A IC VOLT DETECTOR KIA7042AF 1 SMD ICI 874 114066BD 2232249 IC MC14066BDR2G 1 SMD IC602 882 5902515 2420246 DIODE KDV251S 2 SMD D402 403 882 190226AA 2430494 DIODE SWITCHING KDS226 1 SMD D101 882 190184SA 2430515 DIODE SWITCHING KDS184S 11 SMD D1 2 3 103 104 111A 122 154 203 301 302 Created by Approved by Rev No For Stage Release Date Page 40 55 NTEK Model No 3419 Customer Model No M 795 Pow
36. Repair or replace Repair or replace Poor connection on microphone connector Repair or replace No output from Defective push switch on microphone speaker at all e Defective internal speaker Replace Defective VR102 IC103 other components Replace the defective components Measure all the voltage of IC102 with voltage Replace No noise on eris UN speaker Defective squelch circuit components RV102 VR1 IC102 Replace Squelch does not e Defective VR1 RV2 IC2 Replace the defective components Re adjust Created by Approved by Rev No For Stage Release Date Page 6 55 NTEK Model No 3419 Model No Customer M 795 Power Drawring No Rev Date Defective microphone Replace Poor audio output and defective modulation isis microphone amplifier components IC103 Defective microphone connector components Defective ALC circuit 0413 0414 P Replace the defective components Defective D5 D3 Replace 2 cogs e Defective 101 Replace Defective RV101 RV202 Replace LCD display does Defective RED wire fuse e Replace not work e Defective IC101 Q414 Replace Channel selector I does not work Defective 101 SW105 e Replace EMG CH9 19 e Defective EMG SW e Replace does
37. XT 1 SMD 201 917 990003 0751036 TRIMMER CHIP 10K VG039NCHXT 1 SMD 401 917 990005 0752231 TRIMMER CHIP 22K VG039NCHXT 1 SMD RVI 917 990007AA 0754730 TRIMMER CHIP 47K VG039NCHXT 4 SMD RV2 3 101 202 SMD 10 22 24 26 47 55 102 105 106 112 120 129 137 138 139 149 217 227 231 234 236 241 256 302 304 308 424 427 913 421004 30 736 0 010 GRM39X7RI03K25V 35 438 443 503 531 532 612 616 913 422204 1302619 0 0220 GRM39X7R223K50V 4 SMD 27 36 207 306 913 423303 303407Y CAP CERAMIC CHIP 0 00330 GRM39X7R332K50V 1 SMD C316 913 421003HH 30A758Y CAP CERAMIC CHIP 0 0010 GRM39 X7R102K 50V 8 SMD C37 42 115 144 221 226 432 446 SMD C7 8 17 28 29 58 122 127 128 135 136 142 147 152 913 421005CH 130 099 CERAMIC CHIP 0 10 GRM39X7RIO4KI6V 24 177 178 215 451 453 458 602 613 614 615 913 424703HH 304327Y CAP CERAMIC CHIP 0 00470 GRM39X7R472K50V 1 SMD C445 913 424704EX 304404 Y CERAMIC CHIP 0 0470 GRM39Y5V473725V 12 SMD C35 61 141 143 145 146 242 248 314 322 323 530 913 425604 1305292 0 056 GRM39X7R563K16V 1 SMD C455 913 426803HH 306201 CAP CERAMIC CHIP 0 00680 GRM39X7R682K50V 1 SMD C454 913 426804 1306309Y CAP CERAMIC CHIP 0 0680 GRM39X7R683K16V 1 SMD 411 913 431006 1310897 40 5 105716 7 SMD C68 604 606 607
38. ated by Approved by Rev No For Stage Release Date Page 53 55 NTEK Model No 3419 Model No Customer M 795 Power Drawring No Rev Date 45 450 437 5W VR RVO915N 15KQA1 B10K A 1 VRl 46 251 162 52 LED LAMP LTL 81HGK 2 104 105 47 251 224 82 PILOT LAMP 60MA 3 amp 14V 3 B101 102 103 48 251 286 42 LAMP LED L 115 VEGW 1 LED1 49 252 324 7 LCD DISPLAY 1505228 1 50 436 059 72 SW 115 6 51 504 892 MOLEX PLUG ASS Y 1 52 932 557418AB P C B LCD 130 X 30 X 1 6T 1 53 932 557273AB P C B VOL 28 X 12 5 X 1 6T 1 54 932 557343AB P C B ROTARY 13 9 X144 X 1 6 1 55 932 557844AB P C B MAIN 148 X 166 X 1 6T 2 5 1 56 832 501226AA HEAT SINK 1 57 832 501227 SINK L 1 Created by Approved by Rev No For Stage Release Date Page 54 55 Drawring No Rev Date Model No M 795 Power 3419 Model No Customer 5 Als 50 24 Au gt J O o 8 gt 9 alo n ER dix
39. d by Approved by Rev No For Stage Release Date Page 5 55 NTEK Model No Customer 3419 Model No M 795 Power Drawring No Rev Date E Receiver CB receiver is dual conversion supper heterodyne type with the first IF 10 695 MHz and second IF 455 KHz Receiver is separated two blocks 1 IF section and 2 IF section The synthesizer supplies first local frequency 16 270 16 710 MHz for EU and 16 90625 MHz 17 29625 MHz for UK With the provided first local frequencies Q105 Q106 mixes the incoming RF signal to generate first IF signal Mixed signals were filtered with the XF101 10 695 MHz crystal filter and other tuning circuits Output signal of mixer is filtered with CF101 455 KHz ceramic filter The 455 KHz signal from the 2 IF filter was amplified and limits internaly After amplification the signals fed the quadrature detector loop L104 Then we can see the recovered audio signals on Pin 11 for FM of 102 With the amplitude of recovered signals Q112 serves as audio amplifier For AM signal Will be pass filter CF101 and induced to Q116 Q117 respective and detected to voice signal by D111 TROUBLESHOOTING HINTS Symptom Probable Cause Remedy Defective power switch VR102 Replace Unit does not Blown fuse Replace Work at all Broken DC power cord Replace Defective IC101 Replace Defective external speaker jack
40. e phase detector Pin 75 of IC101 The feedback loop is closed by passing the phase detector output through an active low pass filter and using the output to control the VCO frequency through varicap diode D503 D504 Under locked conditions both of phase detector input signal must be indential at 2 5 KHz The VCO frequency is then given by FVCO N 0 0025 MHz 0 0025xN MHz Since N is an integer the VCO frequency can be stepped up with 2 5 KHz increments By suitable choice of N the desired output frequency can be obtained Channel 1 Channel 40 Function N FVCO N FVCO Transmit 5393 13 4825 5481 13 7025 EU Receive 6508 16 2700 6684 16 7100 Transmit 5520 25 13 800625 5598 25 13 995625 UK Receive 6762 50 16 90625 6918 5 17 29625 SEE TABLE FOR OTHER CHANNELS Created by Approved by Rev No For Stage Release Date Page 18 55 3419 Model No Drawring No Customer M 795 Power Rev Date The VCO frequency goes to the double circuit which doubles the incoming signals Double output Frequency Transmit CH 1 13 4825 MHz 26 965 MHz CH 1 13 800625 MHz 27 60125 MHz Transmit CH 40 13 7025 MHz 27 405 MHz CH 40 13 995625 MHz 27 99125 MHz Since all frequencies are obtained from the crystal controlled PLL oscillator all outputs are coherent with the crystal oscillator fre
41. er Drawring No Rev Date 82 190181SA 2430636 DIODE SWITCHING KDS181S 1 SMD D413 932 555418AB 411418B PCB MAIN M 795 148 X 166 X 1 6T 1 SMD 501 400022AB 4A1221B PCB ASSY M 795 183 X 150 X 1 6 1 SMD 932 555273 411273 795 13 9 X 18 7 X 1 6T 1 SUB 932 555343AB 411343B PCB LCD M 795 130 X 30 X 1 6T 1 SUB 932 555844AB 411844B PCB VOLUME M 795 28 X 16 5 X I 6T 1 SUB 501 400028AB 53008MPM MP MANUAL ASSY MP MANUAL ASSY 1 911 322027 0182205X RES METALOXIDE 22 IW 5 ST 1 MAN R237 911 387017LH 0194798W RES METALOXIDE 47 2W 5 ST 1 207 0194798X METAL 911 347017LH RESISTOR 47 2W 5 ST BULK 1 MAN R207 911 110027GH 0301006Z RES FILM 0 1I 2W 5 ST MINI 2 MAN R43 225 911 122017GH 0302290Z RES FILM 22 1 2 5 ST MINI 1 14 911 147037GH 0304711Z RES FILM 470 1 2W 5 ST MINI 1 26 911 147047GH 0304722Z RES FILM 4 7K 1 2W 5 ST MINI 1 315 911 147027GH 0304793Z RES FILM 47 1 2W 5 ST MINI 1 R312 884 190006 0982012 THERMISTOR DISK 200 15 KCSBI20L 3 MAN THI 201 105 884 190010AA 0985013 THERMISTOR DISK 500 5 1501 1 55 915 121005HKAD 001019 Y CAP ELECT 0 10 50V 20 5X11 T2 5pt 5 MAN C13 31 39 433 605 915 121006HKAC 1010062Y ELECT 50V 20 5X11 T2 5pt 4 MAN C59 153 448 452 915 121007CKAB 0104357
42. isplay LCD CH9 OFF microphone jack Figure 6 Figure 3 Created by Approved by Rev No For Stage Release Date Page 10 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date Figure 4 RECEIVER SECTION Test Equipment Required RF Signal generator RFSG e SSVM e Distortion meter DC power supply ALIGNMENT PROCEDURE Step Setting Connection Adjuster Adjust for Audio output adjustment Connect RF signal L101 Maximum indication MIC Receive generator to EXT ANT L102 on SSVM Reduce Volume Fully clockwise jack Connect SSVM 1103 output from RFSG Squelch Turn to and distortion meter L104 until the audio output Counter clockwise with 8 ohm dummy L106 becomes about CH selector 19 load L401 500mW 2V 1 gain Fully clockwise Figure 7 L402 9 OFF L403 RFSG 27 185 MHz 1kHZ 1uV 1 2 Dev Created by Approved by Rev No For Stage Release Date Page 11 55 NTEK Model No Customer 3419 Model No M 795 Power Drawring No Rev Date MIC Receive Volume 500mW 2V 3 Squelch Fully counter Clockwise RFSG 27 185 MHz 1kHZ 1uV 1 2K Dev generator to EXT ANT Jack Connect SSVM and distortion meter to EXT speaker jack with 8 ohm dummy load Figure 7 Squelch adjustment Connect sig
43. ls cease on your channel Then rotate the squelch control knob clockwise to a point where the background noise disappears Note When the squelch is set properly the speaker will remain quiet until a signal is received In order to receive weak signals do not set the squelch too high Adjust the volume to the desired listening level To Transmit Press and hold the push to talk button Speak slowly and clearly in a normal voice two to three inches from the microphone A buit in modulation control circuit will automatically adjust the microphone input level There is no need to speak loudly To Receive Release the push to talk button Created by Approved by Rev No For Stage Release Date Page 4 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date THEORY OF OPERATIONS TRANSMITTER A RF Amplification The output of double AMP Q301 is fed through tuning IFT L301 and L302 to the base of pre driver AMP Q302 The output is then supplied through tuning circuit L303 to RF driver AMP Q303 The output of Q303 is supplied with tuning circuit L304 and C317 C315 C21 and goes to the base of final RF AMP Q304 The output of Q304 is supplied to the antenna through L C tuning circuit B Circuit for Suppression of Spurious Radiation The tuning circuit between the output of final AMP Q304 and antenna 4 stage PHI network L308 C324 C1 C327 L311 C33
44. nal RV1 Adjust until the audio MIC Receive generator to EXT ANT output appears Volume 50mW 2 Jack Connect SSVM Squelch Clockwise and distortion meter to 2 CH selector 19 EXT speaker jack with RFSG 27 185MHz 1kHZ 8 ohm dummy load 1 1 2K DEV Figure 7 RF signal meter adjustment Connect RF signal RV101 Adjust until the 39 LED on the S RF meter lights up Figure 5 Created by Approved by Rev No For Stage Release Date Page 12 55 NTEK Model No 3419 Customer Model No M 795 Power Drawring No Rev Date Figure 6 e e e Figure 7 Created by Approved by Rev No For Stage Release Date Page 13 55
45. quency and maintaining the same percentage accuracy INTERNAL BLOCK DIAGRAM XTIN TAOUT TAPWM P3 4 8 RESET XourxTour 892 14 TACLK P3 2 gt TACAP P3 3 Counter A Vota vue Detector 8 Bit TBPWM P3 0 lt Timer Counter B lt gt CB Voltage Booster lt gt 16 Bit Timer Counter 0 VLCO VLC2 T1CAP P1 0 4 16 Bit LCD gt 1 Port and Interrupt Control Driver SEGO SEG15 TIOUT T1PWM P1 2 gt Counter 1 SEG16 SEG31 Port 1 0 0 0 7 INTO INT7 P1 0 P1 7 4 gt 88 RC CPU 16 32 Kbyte ROM 1 1 7 Serial I O gt SO PIS Port AVREF gt AVss gt P2 0 P2 7 gt Port 2 ADCO ADC7 P3 0 P3 4 lt gt A D Converter Port 4 544 1056 Byte Register File Port 3 Port 5 P5 0 P5 7 Created by Approved by Rev No For Stage Release Date Page 19 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date DIVIDE RATIO VCO RX TX FREQUENCIES FOR EACH CHANNEL OF EU Frequencies RX TX anne MHz Frequencies _ Frequencies 1 26 965 6508 16 27 5393 13 4825 2 26 975 6512 16 28 5395 13 4875
46. requencies for SP band Spain 40CH AM FM 4W CH Frequency MHz Modulation 1 26 965 2 26 975 3 26 985 4 27 005 5 27 015 AM 6 27 025 AM FM 7 27 035 AM FM 8 27 055 AM FM 9 27 065 10 27 075 AM 11 27 085 AM FM 12 27 105 AM FM 13 27 115 AM FM 14 27 125 AM FM 15 2S AM FM 16 27 155 AM FM 17 27 165 AM FM 18 27 175 AM FM 19 27 185 AM FM 20 27 205 AM FM 21 27 215 AM FM 22 27 225 AM FM 23 27 255 AM FM 24 27 235 AM FM 25 27 245 AM FM 26 27 265 AM FM 27 27 215 AM FM 28 27 285 AM FM 29 27 295 30 27 305 31 27 315 32 27 325 33 27 335 34 27 345 35 275955 AM FM 36 27 365 AM FM 37 27 375 FM 38 27 385 AM FM 39 21 305 AM FM 40 27 405 AM FM Created by Approved by Rev No For Stage Release Date Page 33 55 NTEK Model No 3419 Model No Customer M 795 Power Drawring No Rev Date Frequencies for FR band France 40CH FM 4W 40CH AM 1W CH Frequency MHz Modulation 1 26 965 2 26 975
47. t A m eoo m 52 m w ON m m o m gt gt a D5 D302 0 KDS184 KDS184 0 5 m oo mI oo D56 3 6 D303 7 5184 3 1 5184 6 4 gt gt D101 D402 KDS184 KDV251 gt oo oo m oo oo D102 D403 KDS184 KDV251 m o olo m ojo D407 1 6 KDS184 4 3 D103 KDS184 D104 6 8 D413 KDS184 6 KDS184 2 6 D414 0 KDS184 mI oo mI oo mI o m oo D111 1N60 Created by For Stage Approved by Rev No Release Date Page 45 55 NTEK Model No 3419 Customer Ref Pin TX RX Ref Model No M 795 Power Drawring No Rev Date Pin TX RX DZ401 A 0 1N5232 YI OV BPG Bl 05 Created by Approved by Rev No For Stage Release Date Page 46 55 NTEK Model No 3419 Customer Model No M 795 Power 601 DBL5020V Drawring No Rev Date Created by Approved by Rev No For Stage Release Date
48. ter to L302 on the power meter 4 Volume optional the EXT ANT jack on the L303 watts If indication is Squelch optional set Figure 3 not in 4 watts range 1 CH selector 19 adjust L301 L302 CH9 OFF L303 Second harmonic Connect RF power meter At no modulation check With dummy load to compare the level o MIC Transmit spectrum analyzer fundamental Volume optional through coupler 40 dB frequency to the level Squelch optional Attenuator to EXT ANT of harmonic CH selector 19 jack on the set frequency 2 CH9 OFF Figure 4 Suppression of the 2 harmonic frequency level must be lower than 60 dB Check for the other channels Frequency check Connect dummy load CT201 Be sure that the MIC Transmit and frequency counter indication of the Volume optional though coupler to RF transmitter frequency 3 Squelch optional powermeter Connect RF is 27 185MHz 300Hz CH selector 19 powermeter to EXT ANT on the frequency CH9 OFF jack on the set counter Figure 5 Created by Approved by Rev No For Stage Release Date Page 9 NTEK Model No 3419 Customer Model No M 795 Power Drawring No Rev Date TX power level adjustment Volume optional 4 Squelch optional CH selector 1 Connect dummy load and oscilloscope through Coupler to RF powermeter connect audio generator to RV202 Adjust until the 5 bar appears on the channel d
49. the sources of 1 mixer Q105 Q106 in the 1 IF mixer section Second Mixer The output of 10 24 MHz oscillator circuit with X 1 is injected into the IF IC internally Incoming IF signal and 10 24 MHz are mixed inside the IF IC to extract gne F signal 455 KHz FM AM audio signals are recovered with the way of quadrature detector AM signals are recovered with envelope detector Created by Approved by Rev No For Stage Release Date Page 23 55 NTEK Model No 3419 Model No Drawring No Customer M 795 Power Rev Date 4 FREQUENCY STABILITY LET Crystal oscillator frequency Fr Phase detector reference frequency Fvco VCO frequency Ft Transmit frequency Then Fr Fo 1800 And under locked conditions Fr WHERE is the programmable divider divide ratio THEN Fr From which it can be seen the percentage error in Ft is the same as the percentage error Fo stability of the crystal oscillator is determined primarily by the crystal itself and having lesser deviation by the active and passive components of the oscillator The choice of crystal and component is such that the required frequency stability is maintained over the required voltage and temperature rang Created by Approved by Rev No For Stage Release Date Page 24 55 3419 Customer
50. z 274 IF 455 MHZ ign m 0 5 uV for 20 db SINAD FM mode Audio Distortion Less Than 8 1 KHz ims 65 dB Adjacent 65 Signal NOISE H 45 dB Current Drain at SIBQODY 325 mA 3 TRANSMITTER Output POWE TR 4W 13 2 V DC uo u 1 8 2 0 2 2 Frequency response From 400 Hz to 2 5 KHz Output impedance RF 50 ohm Unbalance eg 40 Dral 1300 Created by Approved by Rev No For Stage Release Date Page 3 3419 Drawring No Customer M 795 Power Rev Date OPERATION INSTRUCTIONS Having properly installed your batteries and hooked up the antenna you are now ready to operate your radio for optimum reception and voice transmission Turn the power ON with ON OFF switch Set the desired channel Adjust the squelch control knob to reduce any undesirable background noise when no signal is being received To do this select a channel where no signal are present or wait until signa
51. z Modulation 1 26 960 2 26 970 3 26 980 4 27 000 5 27 010 6 27 020 J 27 030 AM FM 8 27 050 AM FM 9 27 060 AM FM 10 27 070 AM FM 11 27 080 AM FM 12 27 100 AM FM 13 27 110 AM FM 14 27 120 AM FM 15 27 130 AM FM 16 27 150 AM FM 17 27 160 AM FM 18 27 170 AM FM 19 27 180 AM FM 20 27 200 AM FM 21 27 210 AM FM 22 27 220 AM FM 23 27 250 AM FM 24 27 230 AM FM 25 27 240 AM FM 26 27 260 AM FM 27 27 270 AM FM 28 27 280 AM FM 29 27 290 AM FM 30 27 300 AM FM 31 27 310 AM FM 32 27 320 AM FM 33 27 330 AM FM 34 27 340 AM FM 35 27 350 AM FM 36 27 360 AM FM 37 27 370 AM FM 38 27 380 AM FM 39 27 390 AM FM 40 27 400 AM FM Created by Approved by Rev No For Stage Release Date Page 36 55 Model No 3419 Model No Customer M 795 Power Drawring No Rev Date Frequencies for SW band Sweden 24 CH FM 4W 31 MHz CH Frequency MHz Modulation 30 930 2 31 040 3 31 050 4 31 060 5 31 070 6 31 080 7 31 090 8 31 100 9 31 110 10 31 120 11 31 140 12 31 150 13 31 160 14 31 180 15 31 190 16 31 200 17 31 210 18 31 220 19 31 250 20 31 260

M-795 Power Service Manual

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