Home

O _. ICOM SERVICE MANUAL

image

Contents

1. 8 2 0 346 347 048 Es EMITTER 2SK125 Q13 Q14 Q8 Q9 5 4 DRAIN GATE s SOURCE 2SK192A Y Q16 D 6 GATE 5 5 OURCE DRAIN 2 241 Y 322 Q28 Q7 D GATE SOURCE DRAIN 3SK74 KIM Q2 Q3 Q15 Q21 Q27 GATE 1 GATE 2 SOURCE D DRAIN RN1202 012 023 332 034 051 06 COLLECTOR E RN1204 0433 039 354 055 COLLECTOR EMITTER RN2202 010 320 024 025 041 EMITTER 7 3 PLL UNIT TUNER CONTROLI SOCKET REMOTE CONTROL 19 MAIN UNIT Q3 from FRONT UNIT P4 5 44 11 2 2 2 3 2 3253 43 poe 1 6 7 2 from from from 6 UNIT FRONT UNIT FRONT UNIT P7 P1 45 to MAIN UNIT Ul o from MAIN UNIT FRONT UNIT Uu PS 2SA1048 GR Q37 6 S COLLECTOR EMITTER 2SC1571G Q12 E BASE COLLECTOR to 1 MAIN UNIT E 25 2458 7 01 010 011 013 014 016 018 02 020 022 033 04 05 06 07 08 09 032 COLLECTOR EMITTER 2SC2668 O Q23 Q24 Q26 027 330 Q34 Q36 2SK192A GR Q15 Q17 Q19 Q21 Q29 RN1202 BASE COLLECTOR E EMITTER RN2202 031 i GR COLLECTOR 7 4 UNIT
2. SERVICE MANUAL HF ALL BAND TRANSCEIVER 725 Icom Inc INTRODUCTION This service manual describes the latest service informa tion for the 725 ALL BAND TRANSCEIVER at the time of going to press If you require assistance or further information regarding the operation and capabilities of the 725 contact your nearest authorized com Dealer or Icom Service Center POWER TRANSMIT 2 ERI AF SQL MIC 9 RF PWR 2 2 CW N PHONES MIC ORDERING PARTS Be sure to include the following four points when ordering replacement parts 1 2 3 4 10 digit order numbers Component part number and name Equipment model name and unit name Quantity required lt SAMPLE ORDER gt 1110001310 HPC577HA IC 725 MAIN UNIT 5 8810005510 Screw PH M3x6ZKBS 725 cover 10 Addresses are provided on the inside back cover for your 58 DANGER NEVER connect the transceiver to outlet to DC power supply that uses more than 16 V This will ruin the transceiver DO NOT expose the transceiver to rain snow or any liquids DO NOT reverse the polarities of the power supply when connecting the transceiver DO NOT apply RF signal of more than 20 dBm 100mW to the antenna connector This could damage the transceiver s front end
3. 00104 SL 010C 50V Ceramic DD104 SL 100D 50V Ceramic DD104 SL 080D 50V Ceramic DD104 SL 010C 50V Ceramic DD104 B 102K 50V Ceramic DD105 SL 101J 50V Ceramic DD104 SL 330J 50V Ceramic DD104 B 102K 50V Ceramic DD104 SL 080D 50V Barrier Layer UAT 05X 472K Ceramic DD108 B 472K 50V Ceramic DD104 B 102K 50V Ceramic DD108 B 472K 50V Ceramic DD104 SL 050C 50V Ceramic DD104 SL 050C 50V Ceramic DD104 SL 680J 50V Ceramic DD104 SL 010C 50V Ceramic DD108 B 472K 50V Ceramic DD109 SL 471J 50V Ceramic DD105 SL 121J 50V Cylinder UP125 SL 2R2K Ceramic DD104 SL 050C 50V Barrier Layer UZE 08X 104M Barrier Layer UZE 08X 104M Ceramic 00108 472K 50V Ceramic DD108 B 472K 50V 4010000330 4010000220 4010000500 4010000100 4040000150 4010000520 4010000500 4010000520 4010000070 4010000070 4010000300 4010000020 4010000520 4010000430 4010000340 4020000030 4010000070 4040000260 4040000260 4010000520 4010000520 MAIN UNIT ORDER DESCRIPTION 4510001100 4510001160 4010000520 4510002640 4010000330 4010000350 4010000520 4510001140 4040000250 4010000520 4010000520 4010000350 4010000180 4010000520 4010000520 4010000520 4010000520 Ceramic Ceramic Ceramic Barrier Layer Electrolytic Barrier Layer Barrier Layer Barrier Layer Ceramic Ceramic Cerami Ceramic Electrolytic Electrolytic Barrier Layer Ceramic Ceramic Barrier
4. 7 50 56 1 ces 2 INN x 5 27 8 db 4 5 8 d 55 AR 5 oe ae 0 0088 R22 s s 120 m n 14 3 3 0 7 NY 5 8 047 uncis 8 4 BTOIRNI A6 9 of vm Le 6 D 93 2553153 i 2 n2 H 0 0047 120 n 5 D a d 4 6 1 5 RIS 120 gt PH 9 5 H d 1 OFF 4 6V 25 R29 9 7 3 181555 5 516 5 St Sr RT 5 5 216 5 8 2 52 5 OFF ON 15 0V j T 12 5 2 5 151555 2 13 051 12 154 Cat 4 220P tss 1 157 5 688 545 15 151553 220P 0 001 622 220 PLL AND Inc 6 9 16 Kamihigashi Hirano ku Osaka 547 Japan Phone 06 793 5301 Fax 06 793 0013 Telex 05277822 ICOMTR J Icom America Inc lt Corporate Headquarters gt 2380 116th Avenue N E Bellevue WA 98004 U S A Phone 206 454 8155 Fax 206 454 1509 Telex 152210 BVUE lt Customer Service gt Phone 206 454 761
5. 89922652 525 4 309 5 3816 1 HEEN 621 s w mo am s s s s 22 02 81 910 219196 004 8198 26 2 26 88 CODA 9 515702 ZOJA 8 82 56 FCDA ddl vO EE 54 pug 2 5 1 2 92 52 5 9 52 14 14 D I dnw 8 3 iiv m em EH 8 0 09 lt oa HEURE HE 9572252 890 890062 990 E 8692252 oso 899052 50 MaMOd 4H 09 EIST 860965 8 012 121 8 5 5 1 9 880949 151 m 2 3NOL 3015 iv 62 852252 8 orb 5 89 5252 geo E 2 781268 0421 lt 7 21 121 86592252 890 899 54 8 258 0121 Og 1 14 VLNSE 422804 42 13 eio 514 181 xL 49 1 pug
6. 54 1 T s bur LE Fts on 15953 LOIN 690 13253 Kl 25525 89999 D x 3 6 5 43 L i R ix 100 Cer 00047 PLL UNIT D Tran 2 IB 5 9 Ae 1 115 H s 5 Ler 5 5 5 Js 4 5 6 3 0 558 Cw 4 o FAS ra 22 o ery LL d 0 M Ha ET 2 glremesov cw TERK 3OY B S B CW N 25 rs 7 2 6 8 06887 7 DOWN o lt 253 10K 2 Saz 286 0200 298 5 9 0047 DOWNI gt KEY Leg At 7 8 exo 02 196 461 t i FRONT AND MAIN UNITS UNIT 2 5 4 3 6 L 196 02 gromni 9 2 PL
7. 2 uo 4 sas 5 seno D AF OUT 31 ee ER PLL UNIT J4 UNI to MAIN UNIT MAIN UNIT MAIN UNIT MAIN UNIT 47 98 9 310 TEIL PNE to PLL UNIT J3 2SB909M Q 01 BASE COLLECTOR EMITTER 25 2458 GR Q2 Q3 Q4 Q6 BASE COLLECTOR EMITTER RN1204 Q5 e VR UNIT P10 P9 PT ONT UNIT 7 1 MAIN UNIT 315 from Ce 9 Fr peje from FRONT UNIT trom PLL 25 1048 017 038 Q53 EMITTER from PA UNIT E P 31 from PLL UNIT 11 11 2S8909M Q EMITTER from from FM AM UNIT UI 7 P1 FRONT UNIT 8 J22 edel eed Sal pep es front UNIT ef UNIT P2 OPTIONAL 2SC2053 2SC2458 GR 01 011 018 019 026 026 031 5 36 037 04 044 045 049 050 6 EMITTER COLLECTOR BASE BASE COLLECTOR EMITTER d d e fe a am use trom PLL UNIT 3 16 J22 Per UNIT 1 7 P2 OPTIONAL 25 2458 GR Q11 Q18 Q19 Q26 Q29 Q30 Q31 Q35 Q36 Q37 040 042 Q44 045 049 050 056 COLLECTOR 2501225 Q52 5 COLLECTOR EMITTER lt J20 2 29 PLL UNIT from AM FM UNIT UI 7 31 OPTIONAL
8. MAIN UNIT P3 SP te 3 0 e Im 1 2 13 0 a X J to MAIN to Pt MAIN UNIT EPSS 1 13 14 3 1 9 L Je MOTR FI 4 lt at o 14 EI 8 5 6 30 122 5 18 28 1 8 R35 ez 50 D 5 5 c64 ss e193 09 5 sl 21 141 slala s ay 2 8 STSTR 515 8 s 7o 51514 3 D 9181 81 st 553 I 5 vnl 3 5 5 9 5 5 5 136 138 5 14 86 9 0 car 39 100K 100K D D x Les 9 D H 1004W 00 126 17 213 LR f4 09 rel 52 2209 00 60 sel 5 515 se 8 5 Ps 82 8 4 16 3 51 s we O O EX 53 124 51515 cl 51215 9 5 7 Lze Les LR 137 L8 136 Q 09 00 C4 120P C44 oU 2 LIT z 5 Le t 8 645 5302 5 2 00 em 9 516 5 8 52 d usi 4 TX 8v 2 18 29 14 1
9. product DC power cable 025 Optional product Hand microphone 12 EN 5210000080 Spare fuse FGB 20 ES 5210000130 Spare fuse 4 8810005500 B1 M4x12 CR 8810001600 PH ST 6 Screw abbreviations Pan head Flat head B1 ST Self tapping screw 53 FRONT AND PLL UNITS CONNECTOR ASSEMBLY PLL UNIT 17892 to MAIN UNIT P3 J3 J4 t MAIN UNIT DDS UNIT Fete 22034 927 J9 J7 VR UNIT B I786C SW UNIT 1787 5 4 FRONT AND MAIN UNITS CONNECTOR ASSEMBLY AM FM UNIT UI 7 TONE UNIT OPTIONAL UT 30 to OPTIONAL UNIT OPTIONAL 13 2 de UNIT 420 0 860 0 PLL UNIT 2000008 48 1 Con 2 1 to UNIT OPTIONAL 01 7 CW FILTER OPTIONAL VR UNIT B 786 SW UNIT B 1787 5 5 PA AND FILTER UNITS CONNECTOR ASSEMBLY UNIT tun PA UNIT B 17900 FILTER UNIT 1791 to to to to MAIN UNIT FEL UNIT MAIN UNIT POWER SW 46 PI tS SECTION 6 ADJUSTMENT PROCEDURES 6 1 PREPARATION BEFORE SERVICING REQUIRED TEST EQUIPMENT gt EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE AC power supply Output voltage 13 8 V DC Input impedance 50 or better Current capacity 30
10. 15 254 7010000950 Resistor R25J 220 6150002430 15 254 7010004310 Resistor R20J 8 2 80 6150000990 Coil 15 114 7010003920 Resistor R20J 56 Q 6150001470 Coil LS 163 7010004170 Resistor R20J 680 Q 6180000940 LAL 03NA 2708 7010003250 Resistor ELR20J 56 6180000930 LAL 031 2208 7010003660 Resistor ELR20J 100 kQ 6180000900 LAL 101 7010003660 Resistor ELR20J 100 6180000900 LAL 101 7010003530 Resistor ELR20J 10 6180000850 Coil LAL 03NA 4R7K 7010003240 Resistor ELR20J 47 Q 6180000840 Coil LAL 03NA 3R9K 7010003200 Resistor ELR20J 220 6180000900 Coil LAL 03NA 101K 7010004170 Resistor R20J 680 Q 6180000870 LAL gt 7010003490 Resistor ELR20J 5 6 6180000850 LAL 4R7K 7010003260 Resistor ELR20J 68 6180000900 LAL 101 7010004070 Resistor R20J 100 6180000820 LAL 2R7M 7010004300 Resistor R20J 6 8 6180000810 LAL 03NA 2R2M 7010000790 Resistor R25J 1Q UNIT ORDER 7010004230 Resistor R20J 22 7010003510 Resistor ELR20J 6 8 7010004090 Resistor 8204 150 Q 7010004270 Resistor 820 4 7 7010003330 Resistor ELR20J 270 Q 7010003330 Resistor ELR20J 2700 7010003190 Resistor ELR20J 18 7010003460 Resistor ELR20J 3 3 7010004230 Resistor R20J 2 2 7010004230 Resistor 20 22 7010001190 Res
11. 5 023 028 3 20067 155133 135 50 5 x 5 5 K 5 3 sl gt 8 SIND sel 2 0 952 37 258 4 143 2 4 22K 39 15 4 o ELL use Toly 5 LC low 115 at 7 Lc 5 Ni MAIN 11051 in iiis 4 wT o Is g 43 O 2 Ir 12 58524 4 2 ascrese base HIGH O TY LOW yn Olio an ee 9 22 HIGH O TV v LOow ov 1 125 124 25 22 0 27 3 2 232 8 72 0047 7 m LIES ea 5 8 449 5 2 5 3 51 9 s x 7 x 547 c44 x 47 sar k 3r 8 KL 542 SE 47 ces ar 9 58 9 a cea KK Di 7 Re 5 vcos m 99 2 ji 5 DI D I gt 2 18 5 N z 1 USB 14 100 00 amp 513 DATA SPEED 1200 Boud s ab tow 38599 z rere 7441574 42 CIR p c94 5 5 3 AE E 5 2668 8
12. Electrolytic Ceramic Ceramic Electrolytic Electrolytic Electrolytic Barrier Layer Barrier Layer Ceramic Ceramic Electrolytic Ceramic Capacitor Array ORDER UZE 08X 104M 16 SS 100 16 MS16 1000 12 5X16 25 SS 47 10 SS 100 uF UAT 08X 473M 50 MS7 R22 uF 10 SS 100 uF UAT 04X 222K F2D 50V 223K 16 MS7 10 uF 25 SS 47 uF 50 MS7 2R2 uF UAT 05X 472K 50 MS7 R47 UAT 6 153K DD108 B 472K 50V UAT 05X 472K UAT 05X 472K DD105 CH 390J 50V DD111 CH 221J 50V DD111 CH 221J 50V DD108 B 472K 50V DD108 B 472K 50V DD108 B 472K 50V UAT 08X 473M DD104 SL 220J 50V DD108 B 472K 50V DD108 B 472K 50V DD108 B 472K 50V DD104 SL 330J 50V F2D 50V 223K F2D 50V 223K F2D 50V 223K 16 MS7 10 uF 25 SS 22 uF UAT 05X 472K 25 55 47 50 57 1 uF 50 57 282 uF 50 57 1 uF 50 7 1 DD108 B 472K 50V 00108 472K 50 00108 472 00108 472 50 00108 472 50 00105 1014 00108 472 50 UZE 08 104 16 57 10 08 473 00104 102 50 50 MS7 1 uF UAT 05X 103K UAT 05X 103K 50 MS7 R47 50 MS7 R47 uF 16 SS 220 uF 8X11 UZE 08X 104M 16 SS 47 uF B8ZC0111 32N 50 MS7 1 uF 00104 471K 50V DD108 B 472K 50V 16 RBP 10 10 SS 220 uF 50 MS7 487 UAT 05X 472K UAT 05 472K 00104 SL 3904 50V 00104 SL 1804 50V 50 MS7 847 uF DD108 B 472K 50V MAIN UNIT ORDER DESCRIPTION 401 0000520
13. FILTER UNIT to gt lt 5 PA UNIT A INIT to PLL UNIT 97 2SB562 25 1971 25 2904 Q7 E C EC 2SD1406 Y RN1202 RN2202 Q4 Q8 Q9 Q10 c c COLLECTOR BASE BASE E COLLECTOR COLLECTOR EMITTER 7 4 COLLECTOR DC POWER 5 MF1 2605 01 100 25 3133 Q2 Q3 BASE E 7 5 00 UNIT SIDE 5 FOIL SIDE COMPONENT SIDE FOIL SIDE 5 COMPONENT SIDE EBENE FOIL SIDE 7 6 FM UNIT OPTIONAL 3 614 0 047 13 0047 MPCSTTHA rumi5v 0 0 01 est 18963 04 13963 22K KA 00047 me 817 ERT D2PGL2S13 910 RN 1202 FtF FIE rare M5218L 4T 0 0022 93 02 88 R35 RI R38 2 2 SBK FMIT TS 88 A Hi 0 47 R32 IK 539 0 PARTS LIST SECTION 8 FRONT UNIT UNIT ORDER ORDER IC1 1130000790 hPD7225G C1 4510000970 Electrolytic 10 MS9 100 hF C2 4510001150 Electrolytic 50 MS7 R47 4010000520 Ceramic 00108 472 50 1520000230 Transistor 2569091 Q C4 4010000520 Ceramic 00108 472 50 1530000110 Transistor 2SC2458 GR C5 4040000260 Barrier Layer UZE 08X 104M 1530000110 Transistor 2502455438 C6
14. Do 5 CA z8 MSCAN M VEO pr REPAIR NOTE 1 sure problem is internal before disassembling the transceiver 2 DO NOT open the transceiver until the transceiver is disconnected from a power source 3 DO NOT force any of the variable components Turn them slowly and smoothly 4 DO NOT short any circuits or electronic parts insulated tuning 1001 MUST be used for all adjustments 5 DO NOT keep power ON for a long time when the transceiver is defective 6 DO NOT transmit power into a signal generator or a sweep generator 7 ALWAYS connect a 40 dB 50 dB attenuator between the transceiver and a deviation meter or spectrum analyzer when using such test equipment 8 READ the instructions of test equipment thoroughly before connecting equipment to the transceiver H N ab o N t f GO N 0 Our OHM a ANNAN d DOOD 0 o o AD HA DS Pb 0 N TABLE 5 SPECIFICATIONS ere tee 1 1 INSIDE 5 2 1 2 BLOCK 6 3 1 CIRCUIT DESCRIPTION 4 1 RECEIVER CIRCUITS 4 1 TRANSMITTER 5 4 4 EEE RT 4 6 ues 4
15. 7 REGULATOR CIRCUNS o el 4 7 MECHANICAL PARTS AND DISASSEMBLY 5 1 7 FRAME DISASSEMBLY teuer 5 1 PA UNIT AND ACCESSORIES pp 5 3 FRONT AND PLL UNITS CONNECTOR 5 5 FRONT MAIN UNITS ASSEMBLY 5 6 PA AND FILTER UNITS CONNECTOR 55 5 7 ADJUSTMENT 5 6 1 7 PREPARATION BEFORE SERVICING 6 1 PLE ADJUSTMENT o ined eerta te s 6 2 RECEIVER ADJUSTMENT A tege ant FREE s 6 4 TRANSMITTER ADJUSTMENT T 6 6 BOARD LAYOUTS ua qasi 7 1 5 7 1 MAIN UNIT E T 000 0 7 2 258 Md cT c HER 7 3 EN 7 4 BEEN 7 5 AM UNIT OPTIONAL S 7 5 PARTS LIST E 8 1 13 VOLTAGE DIAGRAMS 9 1 2 FRONT AND MAIN UNITS 9 1 PLL AND UNITS NECEM 9 2 SECTION 1 SPECIFICATIONS GENERAL Frequency coverage e Modes e Number of memory channels e Antenna impedance e Usable temperature range e Frequency stability Power
16. GR44 CH 102K 00108 SL 391 50V DD12 SL 221K 500V DM19C 68145 GR44 CH 102K 0012 SL 221K 500 25 SS 47 uF DD108 B 472K 50V 16 MS16 1000 12 5 16 UZE 08 104 DD107 SL 221 50 UAT 08 473M 16 MS16 1000 uF 12 5X16 UAT 08X 473M UZE 08X 104M DD107 SL 221J 50V DD108 B 472K 50V 16 SS 10 00108 472K 50V 16 SS 220 uF 8X11 UAT 08X 473M 00108 472K 50 00108 472 50V GR44 25 SS 47 uF 00108 472K DM20C 15245 0010 SL 151K 500V DD14 SL 331K 500V DM20C 272 5 0010 SL 121K 500V DM20C 15245 0012 SL 221K 500V DD12 SL 181K 500V DD10 SL 151K 500V 0012 SL 221K 500V DM20C 12245 DD09 SL 680K 500V DD12 SL 221K 500V DD12 SL 221K 500V DD12 SL 221K 500V 0012 8 01 500 DD12 SL 181K 500V DD09 SL 101K 500V DD12 SL 221K 500V DD12 SL 221K 500V DD12 SL 221K 500V 0006 SL 330K 500 0012 SL 221K 500 DD12 SL 181K 500V DD10 SL 121K 500V 0009 SL 820K 500 0006 SL 270K 500 UNIT ORDER DESCRIPTION PA _UNIT ORDER 4040000250 4010000330 6330000180 5210000130 5220000020 5220000020 6910000060 2510000040 2710000160 6910000600 6910000600 Barrier Layer Ceramic Relay Fuse Holder Holder Thermostat Speaker Fan Motor Ferrite Bead Ferrite Bead 4010004030 Ceramic DD10 SL 121K 500V Ferrite Bead 0 4010
17. Va 25 220 X L2 D 4 m Y 2 5 4 Vp p sl 5 IK x vs n 3 2 76 470 D 0 ov 4 5 LOCK 9 1 L 70 pon V 133 4 7K sv m S H Ics 2 9 b 7441574 Ze 1 DDS se amp 3 5 UNIT 85 NM 134 220 K 47 220 I x 1 L pe ap af 8 5 2 H 5 5 x IPSTB x 8 n 7 27 ay 8 10578 LL msec 55 E FUNCTION DISPLAY 3 ies rev a E aov j 99 t 5 033 55 5 48 28 2458 3 k 5 2 5 136 e a RN E 2 STOIRNI AS 2 434 133 133 e 5 32 CRR miis 13 4957 Ts ray gt RIS x 2 OVEUN LOCK e aj o 5 T 19 8 2 8 9 0 7 wei 86 1 x mv ee WAU Hn I ov itt 2 9v sv 6 SENSOR HIGH SPEED MORE THAN 5 5 on 2 LOW SPEED LESS THAN1 5V d 155155 159133 10 Q 47 L3v 25524584 R50 22 SENSOR D 5 0 DOWN OV
18. 4010000520 4010000520 4010000520 4010000520 4010000520 4010000430 4010000520 4510001140 4610001200 4010000500 4040000250 4040000260 4040000260 4040000250 4010000520 6330000180 6330000560 2230000700 6510006640 0910019635 PLL UNIT ORDER 1130000670 1130000970 1130003870 1130001270 1130003890 1110000240 1110001680 1140000910 1120000970 1180000340 1130001360 1130003860 1130002960 1120001620 1120001620 1110001320 1110001320 1530000110 1530000110 1530000110 1530000110 1530000110 1530000110 1530000110 1530000110 1530000110 1530000110 1530000110 1530000940 1530000110 1530000110 Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Trimmer Ceramic Barrier Layer Barrier Layer Barrier Layer Barrier Layer Ceramic Relay Relay Switch Switch P C Board Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor DD108 B 472K 50V DD108 B 472K 50V DD108 B 472K 50V DD108 B 472K 50V DD108 B 472K 50V DD108 B 472K 50V DD109 SL 471J 50V DD108 B 472K 50V 50 MS7 R22 uF CVSSE3001 00104 102K 50V UAT 08X 473M UZE 08 104M UZE 08X 104M UAT 08X 473M DD108 B 472K 50V MZ 12HG OUC SH 114D SPPJ31309A BK IN 50864 1 B 1788E 6 6 GD4001B uPD4069UBC 6040248 222 S 8054ALB HD63A01Y0G83P M54562P TA78005AP
19. 4021 MB4052M G TC9181P M74ALS74AP M74ALS74AP uPC1037HA UPC1037HA 2802468 8 28024568 85 25C2458 GR 25 2458 2SC2458 GR 2SC2458 GR 2SC2458 GR 2SC2458 GR 2SC2458 GR 2SC2458 GR 2SC2458 GR 2SC1571G 2SC2458 GR 2SC2458 GR PLL UNIT ORDER 2SK192A GR 2562455068 FET 2SK192A GR Transistor 2SC2458 GR FET 2SK192A GR Transistor 2SC2458 GR FET 2SK192A GR Transistor 2SC2458 GR Transistor 25 2668 25 2668 Transistor RN1202 Transistor 25 2668 Transistor 25 2668 2SK192A GR Transistor 25 2668 Transistor RN2202 Transistor 2SC2458 Y Transistor 2SC2458 GR Transistor 2SC2668 O Transistor RN1202 Transistor 25 2668 Transistor 2SA1048 GR 1710000160 Diode 1SS133 1710000160 Diode 1SS133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1730000100 2 RD5 1E B2 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 1 133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160
20. 4040000210 4010000520 4040000150 4040000150 4010000840 4010001020 4010001020 4010000520 4010000520 4010000520 4040000250 4010000180 4010000520 4010000520 4010000520 4010000220 4310000060 4310000060 4310000060 4510001100 4510002850 4040000150 4510002640 4510001160 4510001170 4510001160 4510001160 4010000520 4010000520 4010000520 4010000520 4010000520 4010000330 4010000520 4040000260 4510001100 4040000250 4010000500 4510001160 4040000190 4040000190 4510001150 4510001150 4510002440 4040000260 4510002810 4530000350 4510001160 4010000460 4010000520 4510001770 4510002740 4510001190 4040000150 4040000150 4010000240 4010000160 4510001150 4010000520 Electrolytic Electrolytic Barrier Layer Electrolytic Electrolytic Barrier Layer Mylar Electrolytic Electrolytic Electrolytic Barrier Layer Electrolytic Barrier Layer Ceramic Barrier Layer Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Mylar Mylar Mylar Electrolytic Electrolytic Barrier Layer Electrolytic Electrolytic Electrolytic Electrolytic Electrolytic Ceramic Geramic Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Electrolytic Barrier Layer Ceramic Electrolytic Barrier Layer Barrier Layer Electrolytic Electrolytic Electrolytic Barrier Layer Electrolytic
21. B SENSOR UP OY DOWN S OY 6040248 92 09 25 2458 213 08 155133 nn lt lt 47 020 1851 LI Ll RIG LOK 1 11 gt 2 2 12578 oce R50 10K FUNCTION DISPLAY I4 00 00 DEES 44444444 02 155133 182 GES DES er REED 5 Ts nie oste 85 ex comme i f Cat Ce DI 8 Lu amp Lu LLL 20 RESET lt 718 T 203nsec vp p 039 042 155133 xr CSA4 9 MG i ica 0 0659 8 133 1000 from FRONT UNIT frem FRONT UNIT from FRONT UNIT PS from FRONT UNIT P3 1 1msec 140 144 146 BTOIRNI 3PIN from FRONT UNIT PI uss 14 00 00 5 1200 Boud Sec 84msec 2 2Vp p KEY START 15 8 GNO e 22 9 22 gt 3 2605 01 UNIT 7 2 2 E CIO 0 047 R42 03430 1
22. MEASUREMENT ADJUSTMENT UNIT LOCATION UNIT ADJUST REFERENCE Displayed frequency 14 10000 MHz Terminate P4 to Pre set to center FREQUENCY Mode USB ground with a 50 Q e Receiving resistor Connect the RF Maximum level More L38 L39 voltmeter to P4 than 3 dBm Connect the 61 4400 MHz frequency counter to P4 n After E remove the resistor from P4 re plug P4 ADJUSTMENT CONDITIONS Displayed frequency 14 10000 MHz USB e Receiving DDS CLOCK Connect the 5 24288 MHz frequency counter to IC4 pin 11 or IC5 pin 11 DDS LOOP 1 Displayed frequency 14 12650 MHz PLL Connect the 1 0 V DC Mode AM oscilloscope to 8133 e Receiving rear panel side Approx 2 0 DC 1ST LO 6 5 DC LOCK 6 5 DC Displayed frequency 14 12649 MHz Verify Connect the oscilloscope to R77 shielding case side Displayed frequency 7 99999 MHz PLL Mode USB e Receiving Displayed frequency 14 99999 MHz e Displayed frequency 21 99999 MHz Displayed frequency 33 00000 MHz e Displayed frequencies 0 50000 MHz 8 00000 MHz 15 00000 MHz and 22 00000 MHz e Displayed frequency 14 10000 MHz PLL VOLTAGE 6 5 V DC 7 5 V DC More than 2 0 V DC Verify Terminate P5 to More than 0 dBm Verify ground with a 50 Q resistor Connect the RF voltmeter to P5 Mode USB Receiv
23. both terminals of R26 is applied to the MAIN UNIT via the ICH and ICL signal line Thermal switch S1 and thermistor R32 detect the temperature of Q6 and Q5 respectively and control the cooling fan speed TEMPERATURE C F Below 50 50 90 Above 122 122 194 194 THERMAL SWITCH 51 RESISTANCE OF R32 RECEIVE TRANSMIT COOLING FAN SPEED COOLING FAN CONTROL CIRCUIT THERMAL SWITCH HV PAT8 8 V in Tx Fig 4 4 2 5 RF FILTER CIRCUIT UNIT UNIT has 6 Chebyshev low pass filters The signal from the power amplifier Q5 Q6 applied to one of the low pass filters depending on the transmit frequency range suppresses high harmonic components The filter switching voltage obtained at the PLL UNIT is applied to the PA UNIT via P7 FREQUENCIES AND APPROPRIATE FILTERS L6 15 22 E The filtered signal passes through the SWR detector circuit L51 and is then applied to the antenna connector The forward signal from L51 is detected at D7 and applied to the MAIN UNIT as the FOR voltage The reflection signal from L51 is detected at D8 and applied to the MAIN UNIT as the REF voltage 4 2 6 ALC CIRCUIT MAIN UNIT The ALC Auto Level Control circuit stably controls the RF output power using the RF POWER control The FOR voltage from the PA UNIT is applied to IC11 pin 2 and IC10 pin 3 The POC voltage controlled by the R
24. 72 0711 32 DD108 472 50V 8 0114 32 08X 473M UZE 08X 104M DD108 B 472K 50V 16 SS 100 uF 00104 102 50V 50 2 2 uF 00104 3304 50V UAT 08X 473M 00107 CH 101 50V DD104 CH 200J 50 CVSSA1001 DD107 CH 680J 50V 25 55 47 DD104 CH 120J 50V DD104 CH 1204 DD108 B 472K 50V DD108 B 472K 50V DD104 SL 010C 50V 00104 B 102K 50V DD107 CH 680J 50V DD104 CH 150J 50V CVSSA1001 DD106 CH 470J 50V 25 SS 47 DD104 CH 120J 50V DD104 CH 120J 50V DD108 B 472K 50V DD108 B 472K 50V DD104 SL 010C 50V DD104 SL 470J 50V DD104 SL 510J 50V DD104 B 102K 50V DD106 CH 510J 50V DD104 CH 100D 50V CVSSA0701 PLL UNIT ORDER 4510001100 4010000500 4010000520 4010000520 4010000380 4040000260 4040000260 4010000520 4020000400 4040000260 4510002640 4010000270 4610001120 8 10 Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Trimmer Ceramic Electrolytic Ceramic Ceramic Ceramic Barrier Layer Electrolytic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Tantalum Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Barrier
25. 7310000790 Trimmer RH0651C15J1UA 104 7010004530 Resistor R20J 470 kQ 7010003480 Resistor ELR20J 4 7 7010003810 Resistor ELR20J 2 2 7010003360 Resistor ELR20J 470 Q 7010001050 Resistor R25J 150 Q 7010003530 Resistor ELR20J 10 7010001400 Resistor R25J 100 7010004190 Resistor R20J 1 7010003740 Resistor ELR20J 470 7010003740 Resistor ELR20J 470 7010003530 Resistor ELR20J 10 7010004070 Resistor R20J 1000 7010003530 Resistor ELR20J 10 7010000090 Resistor ELR25J 4 7 7010000370 Resistor ELR25J 1 7010000090 Resistor ELR25J 470 7010000370 Resistor ELR25J 1 7010000090 Resistor ELR25J 4 7 Q 7010003280 Resistor ELR20J 100 0 7410000140 Resistor Array RMX 6 472K 7010004110 Resistor R20J 2200 7010003480 Resistor ELR20J 4 7 7010003480 Resistor ELR20J 4 7 7010003490 Resistor ELR20J 5 6 7010004310 Resistor 820 82 7010003380 Resistor ELR20J 680 Q 7310000860 Trimmer RH1051D13J0JA 102 7010003540 Resistor ELR20J 12 7010003440 Resistor ELR20J 2 2 7310000750 RH0651C14J2WA 103 7010004320 Resistor R20J 10 7010001030 Resistor R25J 1000 MAIN UNIT ORDER 7210001540 Variable Resistor RKO9K1110AEFA 7010004320 Resistor R20J 10 7010004190 Resistor R20J 1 80 7010004300 Resistor 820 6 8 kQ 7010004570 Resistor R20J 1 7010001030 Resistor 825 100 Q 7
26. DB3 DB4 AH3 KEY ON DB5 9 086 MIC UP DN SPEED TUNER THROUGH DB7 Fig 7 AH3 START 4 4 5 PARALLELISERIAL CONVERTER PLL UNIT IC11 is a parallel serial converter Parallel data from the CPU are converted into serial data to transfer the PLL N data DDS N data data for LCD driver etc When the power is turned ON the CPU also outputs programmable divider data and a control signal for universal ports to the PLL IC IC13 4 5 REGULATOR CIRCUITS Either 8 5 or 5 V DC are supplied from corresponding regulator circuits 8 5 and 5 V DC are regulated at the following circuits using 13 8 V DC 1 5 V REGULATOR PLL UNIT 5 V DC are regulated by the three terminal voltage regulator IC10 2 8 V REGULATOR MAIN UNIT 8 V DC are regulated by the three terminal voltage regulator IC14 3 5 V REGULATOR PLL UNIT 6 generates a negative pulse type voltage by converting the DC input to AC voltages approx 6 7 kHz as a multivibrator The voltage is rectified at 08 09 regulated by a Zener diode D10 and C13 and is then applied to the MAIN UNIT MM 2 2 Xn gt D LLI 0 2 lt 02 lt o ac t l lt lt lt LU SECTION 5 5 1 FRAME DISASSEMBLY MAIN UNIT 1788 PLLUNIT B 1789F 1787 SWUNIT VR
27. Layer Barrier Layer Barrier Layer Barrier Layer Barrier Layer Barrier Layer Ceramic Barrier Layer Barrier Layer Barrier Layer Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Ceramic Ceramic Barrier Layer Ceramic Ceramic Ceramic Electrolytic Ceramic Electrolytic Ceramic Electrolytic Barrier Layer Ceramic Electrolytic Barrier Layer Electrolytic Electrolytic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Ceramic Ceramic Electrolytic Barrier Layer Ceramic Ceramic Ceramic 00108 8 472 50 00104 SL 270 00108 472 50 05 472 16 MS7 10 hF UAT 05X 472K UAT 05X 472K UAT 05X 472K DD108 B 472K 50V DD108 B 472K 50V 00105 SL 1214 DD104 SL 220J 50V 16 57 10 pF 25 SS 47 uF UZE 08 104 00108 472K 50V DD108 472 50 2 08 104 UAT 05 472K UAT 05X 472K UZE 08X 104M UAT 08X 473M UAT 08X 473M 00105 SL 1014 50V UAT 08X 473M UAT 08X 473M UAT 08X 473M 00105 SL 101 00106 SL 1514 DD104 SL 1000 50V DD104 SL 820J 50V UZE 08X 104M DD104 SL 100D 50V DD305 F 104Z 12V DD305 F 104Z 12V DD104 B 102K 50V UZE 08 104M 00104 SL 050 50V DD104 SL 080D 50V DD104 SL 0600 50V UZE 08X 104M DD108 B 472K 50V DD104 SL 060D 50V DD108 B 472K 50V 50 7 R47 DD108 B 472K 50V 50 MS7 3R3 u
28. Layer Electrolytic Ceramic Ceramic Ceramic Ceramic Barrier Layer Barrier Layer Ceramic Cylinder Barrier Layer Electrolytic Ceramic Trimmer DD106 CH 470J 50V 25 SS 47 uF DD104 CH 080D 50V DD104 CH 120J 50V DD108 B 472K 50V DD108 B 472K 50V DD104 SL 010C 50V DD104 B 102K 50V DD106 CH 470J 50V DD104 CJ O30C 50V CVSSA0701 00105 CH 3304 50V 25 47 HF DD104 CH 060D 50V 00104 1204 50V 00108 472 50V UZE 08 104 16 SS 100 pF 00108 472K 50V 00104 SL 010 50 00104 102K 50V 00104 SL 470 50V UAT 05X 472K 00104 471K 50V UAT 08X 473M DD107 SL 221J 50V DD104 B 102K 50V DD104 SL 390J 50V DD104 SL 150J 50V 00104 SL 390 50V 00104 SL 180 50V DD104 SL 270J 50V DD104 SL 360J 50V DD104 SL 220J 50V DD104 SL 100D 50V UAT 05X 472K 00108 472K SOV UAT 05X 472K DD108 B 472K 50V DD104 SL 680J 50V DD104 SL 060D 50V DD104 SL 820J 50V 00104 SL 180J 50V DD104 SL 750J 50V DD108 B 472K SOV UZE 08X 104M 00108 472K UAT 08 473M DD108 B 472K 50V 00104 471K 50V DD104 SL 300J 50V 00107 SL 3314 50 DD108 B 472K 50V UZE 08X 104M DN 1C 2R2M DD108 B 472K 50V DD104 CH 150 50 DD105 300 50 DD107 CH 680 50V 00104 120 50V 00104 120 50V 05 472 16 57 10 uF 00104 102K 50V 00108 472 50V 00108 472 50V 00107 SL 221 50V UZE 08 104 UZE 08 104 00108 472 50 UP050 102 UZE 08 104 25 47 pF 00104 SL 510
29. Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Array Resistor Resistor Resistor Variable Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor ORDER ELR20J 100 R20J 10 25 10 820 1 5 ELR20J 10 ELR20J 47 820 100 ELR20J 47 ELR20J 47 R20J 10 ELR20J 47 ELR20J 1 ELR20J 1 ELR20J 1 ELR20J 1 ELR20J 1 ELR20J 1 R25J 1 R25J 1 R25J 1 R25J 1 R25J 1 R25J 1 kQ ELR20J 750 Q ELR20J 1 8 kQ ELR20J 3 3 kQ ELR20J 5 6 kQ ELR20J 10 ELR20J 4 7 kQ R20J 1 kO R20J 1 825 825 R25J R25J R25J R25J R50XJ 22 Q ELR20J 10 ELR20J 47 Q ELR20J 100 ELR20J 10 kQ R20J 47 Q ELR20J 4 7 kQ ELR20J 2 2 kO ELR20J 47 ELR20J 47 820 47 825 100 R20J 47 R20J 47 R20J 47 R20J 47 R25J 47 RMX 8 103 ELR20J 10 R20J 47 ELR20J 68 55555 5555555 RK09
30. Resistor R20J 100 Q 7410000180 Resistor Array RMX 8 103K 7010003350 Resistor ELR20J 390 Q 7010004040 Resistor 820 560 7010003620 Resistor ELR20J 47 7010000870 Resistor 825 4 7 Q 7010004270 Resistor R20J 4 7 7010003740 Resistor ELR20J 470 7010004370 Resistor R20J 22 7010004420 Resistor 820 56 7310000750 Trimmer RH0651C14J2WA 103 7010004320 Resistor R20J 10 7010001030 Resistor R25J 1000 7010003820 Resistor ELR20J 3 3 7010004570 Resistor R20J 1 7010004370 Resistor R20J 22 7310000750 Trimmer RH0651C14J2WA 103 7010003580 Resistor ELR20J 22 7010004610 Resistor 820 3 3 7010003530 Resistor ELR20J 10 7010004070 Resistor 820 10002 7010004320 Resistor 820 10 7010004250 Resistor R20J 3 3 7010003360 Resistor ELR20J 470 Q 7010003480 Resistor ELR20J 4 7 7010003550 Resistor ELR20J 15 7010003510 Resistor ELR20J 6 8 7010003640 Resistor ELR20J 68 7010003660 Resistor ELR20J 100 7010003400 Resistor ELR20J 1 7010004150 Resistor 820 470 Q 7010003700 Resistor ELR20J 220 7010004340 Resistor R20J 15 7010004300 Resistor 820 6 8 7010004250 Resistor 820 3 3 7010003240 Resistor ELR20J 47 7010004030 Resistor 820 470 7010004070 Resistor R20J 100 7310000740 RH0651CS3J2KA 472 7010003530 Resistor ELR20J 10 751
31. lt lt Lal LINN NIVW 862252 665 38 055 60452 90 221 38 SECTION 4 CIRCUIT DESCRIPTION 4 1 RECEIVER CIRCUITS 4 1 1 SWITCHING CIRCUIT PA AND MAIN UNITS RF signals from the antenna connector pass through the transmit receive switching relay RL13 and low pass filter and are applied to the MAIN UNIT via P2 MAIN UNIT J12 The signals from the PA UNIT either bypass or are attenuated at 20 dB attenuator R102 R103 RL1 There no non linear components between the antenna connector and attenuator to prevent distortion caused by strong signals The signals are then applied to RF filters 4 1 2 RF BANDPASS FILTER CIRCUIT MAIN UNIT The RF UNIT has 7 RF bandpass filters BPF for signals above 1 6 MHz and 1 low pass filter LPF for signals below 1 6 MHz The signals pass through of the bandpass or low pass filters depending on the receive frequency range 1 0 5 1 6 MHz A diode is not used at the low pass filter entrance removing diode distortion from very strong signals Signals bypass a preamplifier by the bypass switch 012 2 1 6 MHz AND ABOVE Signals are applied to a high pass filter consisting of L42 143 C143 C146 This filter suppresses strong signals below 1 6 MHz such as a broadcasting station The filtered signals are applied to one of 7 bandpass filters depending on the frequency
32. of the signals and then to the preamplifier circuit Q8 Q9 3 FILTER SWITCHING CIRCUIT An RF bandpass filter is selected with BPF switching voltage BO B7 from the CPU IC16 current amplifier The switching voltage of the BPF entrance is higher than the exit to improve multi signal and strong signal characteristics 4 1 3 PREAMPLIFIER CIRCUIT MAIN UNIT The preamplifier circuit uses low noise junction FETs 28K125x2 to provide 10 dB gain over a wideband frequency range When the PRE switch is turned ON the signals from the RF filter are amplified by the preamplifier circuit Q8 Q9 When the PRE switch is turned OFF the signals bypass the preamplifier through D30 and D32 When the operating frequency is below 1 6 MHz Q12 turns ON and the signals bypass the preamplifier regardless of the PRE switch Amplified or bypassed signals are applied to the 1st mixer circuit via the low pass filter The low pass filter cuts off at 35 MHz to suppress image frequency at the 1st mixer circuit Q13 Q14 PREAMP CIRCUIT Switch IN open RF signal OUT short from BPF 10 fst mixer 4 1 4 1ST MIXER CIRCUITS MAIN UNIT The signals from the low pass filter enter the 1st mixer circuit 013 014 to be converted to a 70 45 MHz 1st IF signal EXACTNESS 1ST IF FREQUENCY The 1st mixer circuit employs a balanced mixer using low noise junction FETs 28K125 x 2 to expand the dynamic ra
33. oscillation The PLL oscillation frequency is obtained by the following calculation fy fio Nr X frer Main loop output Sub loop output Nr Dividing ratio from the CPU frer Reference frequency 512 kHz 4 3 4 CIRCUIT PLL UNIT The transceiver s C N ratio is determined by the VCO and the loop filter 4 VCO circuits keep the low noise and reduce spurious emissions 316 318 Q20 and Q22 are VCO switches which select the operating VCO with NCO1 VCO 4 lines 4 3 5 SUB LOOP PLL UNIT The sub loop uses the DDS system that generates 62 05 62 56199 MHz signals in 10 Hz steps The oscillated signal at the VCO Q29 is buffer amplified at Q30 and mixed with the 2nd LO signal 61 44 MHz at IC17 The resulting signal passes through the low pass filter is amplified at Q32 and is then applied to the DDS UNIT The output pulse type signal from the DDS UNIT passes through the loop filter R133 R134 C114 C115 L42 where it is converted into a DC signal lock voltage The lock voltage is applied to the VCO to lock the oscillating frequency PLL CIRCUIT BLOCK DIAGRAM MAIN LOOP VCO1 VCO4 fy 70 9515 100 4515 MHz 1st LO to MAIN UNIT Nr 1 a m a a a a oo aa ae 62 05 6256199 MHz DATA fa ed BUFFER SUB LOOP Q34 R
34. peak output power More than 50 dB down with 1 kHz AF input 600 Q SSB CW AM Double conversion superheterodyne FM Triple conversion Superheterodyne 1st SSB 70 4515 MHz CW 70 4506 MHz FM 70 4500 MHz 2nd SSB 9 0115 MHz CW 9 0106 MHz FM 9 0100 MHz 3rd 455 kHz SSB CW 10 dB S N 1 8 30 MHz Less than 0 15 uV 123 dBm AM 10 dB S N 0 5 1 8 MHz Less than 13 0 pV 85 dBm 1 8 30 MHz Less than 2 0 uV 101 dBm 12 dB SINAD 28 30 MHz Less than 0 5 113 dBm Less than 0 3 pV preamplifier ON SSB CW More than 2 3 kHz 6 dB Less than 4 0 kHz 60 dB AM More than 6 0 kHz 6 dB Less than 20 0 kHz 40 dB FM More than 15 kHz 6 dB Less than 30 kHz 50 dB More than 70 dB 80 More 2 6 W at 10 distortion with 8 Q load More than 1 kHz All stated specifications are subject to change without notice or obligation 1 1 SECTION 2 INSIDE VIEWS PLL UNIT ER i 5 DC DC converter circuit AID converter 1C12 MB4052M G interface diode matrix 1 Lithium backup battery r3 5 V regulator h IC10 TA78005AP circuit Band voltage butter 9 54562 MAIN UNIT Rx bandpass filters Rx 1st mixer circuit Tx 2nd mixer circuit FI1 FL 71 Noise blanker circuit Rx 2 151 mixer IC1 ND487C1 3R MCF 12 FL 23 9 MHz
35. to the KEY jack and 100 W keep the key down R208 Repeat steps 2 and 3 a couple of times PWR control CCW Mode CW IN switch e DELAY contro e Connect an external electronic keyer to the KEY jack and close the key Keying TRANSMITTER ADJUSTMENT CONTINUED MEASUREMENT 07 ADJUSTMENT CONDITIONS LOCATION UNIT ADJUST CARRIER Displayed frequency 1 91000 MHz Connect the Minimum carrier level R177 SUPPRESSION Mode USB and LSB spectrum analyzer to Less than 50 dB R179 e MIC control Max CCW the antenna Altemately Apply no signal to tke MIC connector via the adjust connector attenuator Transmitting ADJUSTMENT MAIN UNIT R210 power adjustment R208 R194 Output power pre setting Ic APC adjustment L16 Transmit gain 8186 meter adjustment J6 pin 2 SWR detector CP R241 Output power pre setting CW delay time adjustment J11 CW delay time CP J6 pin 3 Ic adjustment pre setting Jumper wire to GND Chassis R177 Suppression adjustment R179 Transmit gain adjustment R87 SWR detector adjustment pre setting SECTION 7 BOARD LAYOUTS 7 1 FRONT UNIT e SW UNIT w97 PLL UNIT eme 4 484 FUNCTION DISPLAY i ES e
36. 0 m 15595 CSR 558 6 15553 100 923 2 L oe ie 212 13333 18553 RN2202 1 047 133133 1 15353 LOB 19533 2 7 VR Di 153133 153133 267 4 7 9 10K 2362459 TORI 0 0047 2 HE ME 53 z i 25 2 29 8v 2 3 143 100 Rx sv 627 0 0047 TX RX3 0V cag TX RX 278 7 53 175 crs 0047 100 124 0 22 y R140 3323 RI39 10K 134 3 3K 1888 558 3 0 8 Cw N 5 x 5 H 2 z TX RX 558 54 5 5 0 3wiTCM 7 2viCw 254 247 6 8 DOWN AEQ MAN 9552 23012290 t ou i 7 24 2 6 0 6 ose I 2341048 d di 5 R245 BS Pia 3133 2 coer s 206 290 222 5 5 0 0047 2 KEY DOWN x D x gt
37. 0000120 Thermistor ERT D2FGL332S 7010004070 Resistor R20J 1000 7010003300 Resistor ELR20J 150 Q 7010004150 Resistor R20J 4700 7010004410 Resistor R20J 47 7010001030 Resistor R25J 100 Q 7010004230 Resistor R20J 2 2 7010003440 Resistor ELR20J 2 2 7010003530 Resistor ELR20J 10 7010003830 Resistor R20J 10 7010003300 Resistor ELR20J 150 7010003400 Resistor ELR20J 1 7010003530 Resistor ELR20J 10 7010004320 Resistor R20J 10 80 7010003530 Resistor ELR20J 10 7010004320 Resistor 820 10 7010004190 Resistor 820 1 7010003480 Resistor ELR20J 4 7 7010001150 Resistor R25J 1 7010003400 Resistor ELR20J 1 7010004390 Resistor 8204 33 7010003990 Resistor R20J 220 7010003400 Resistor ELR20J 1 80 7010003660 Resistor ELR20J 100 7010004070 Resistor 820 100 Q 7010004450 Resistor R20J 100 7010001400 Resistor 825 100 7010003660 Resistor ELR20J 100 7010003440 Resistor ELR20J 2 2 kO 7010004230 Resistor 820 2 2 MAIN UNIT ORDER 7010003440 Resistor ELR20J 2 2 7010004230 Resistor 820 22 7010003480 Resistor ELR20J 4 7 701
38. 0000900 6180000900 6180000900 6180000900 6180000900 6180000900 6180000900 6180000880 6180000880 6180000880 6180000880 6180000900 6140001460 6140001340 7010000310 7010001050 7010000290 7010000330 7010004830 7010004120 7010004730 7310000680 7010000990 7010000990 7010004730 7010004730 7010004650 7080000650 7080000650 7080000650 7080000650 7010004730 7310000710 7010004650 7010004650 7080000650 7080000650 7070000250 7010000370 7100000510 7010000370 7010001090 7010004150 7010004190 7010003490 7510000070 7010003610 7010004020 7010004060 7010004270 7010003550 7010003660 7010004270 7010003550 7010003660 7540000010 7010004390 6180000900 Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Resistor Resistor Resistor Resistor Resistor Resistor Resistor Trimmer Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Trimmer Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Thermistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Absorber Resistor BTO1RN1 A61 001 LAL 101 LAL O3NA 101K LR 136 18 137 LR 214 LR 215 LR 216 LR 216 LR 217 LR 218 LR 157 L
39. 0004260 Resistor 20 39 7010003420 Resistor ELR20J 1 5 7010003660 Resistor ELR20J 100 7310000750 Trimmer RH0651C14J2WA 103 7010003660 Resistor ELR20J 100 7310000750 Trimmer RH0651C14J2WA 103 7010004490 Resistor R20J 220 7010003440 Resistor ELR20J 2 2 7010003480 Resistor ELR20J 4 7 kQ 7010003530 Resistor ELR20J 10 7010004230 Resistor R20J 2 2 7010003720 Resistor ELR20J 330 7310000790 Trimmer RH0651C15J1UA 104 7010004410 Resistor 820 47 7010003620 Resistor ELR20J 47 7010001110 Resistor R25J 4700 7010004190 Resistor R20J 1 7010004410 Resistor R20J 47 7010003620 Resistor ELR20J 47 7010004390 Resistor 20 33 7310000750 Trimmer RH0651C14J2WA 103 7010003600 Resistor ELR20J 33 7010003780 Resistor ELR20J 1 7010004150 Resistor 820 4700 7010004570 Resistor R20J 1 7010005220 Resistor ELR20J 10 7010004570 Resistor 201 7010004270 Resistor R20J 4 7 7010001110 Resistor 825 470 Q 7010004500 Resistor R20J 270 7010003720 Resistor ELR20J 330 7010003360 Resistor ELR20J 470 Q 7010003650 Resistor ELR20J 82 03 7010003650 Resistor ELR20J 82 04 7010003480 Resistor ELR20J 4 7 01 7010003480 Resistor ELR20J 4 7 02 7010003510 Resistor ELR20J 6 8 7310000740 RH0651CS3J2KA 472 7010003530 Resistor ELR20J 10
40. 004050 Ceramic 0012 SL 181K 500 Ferrite Bead FSOH070RN 4010003960 Ceramic 0006 51 390 500 Ferrite Bead FSOH070RN 4010004050 Ceramic DD12 SL 181K 500V Ferrite Bead FSOH070RN 4010004010 Ceramic 0009 SL 101 500 4010003870 Ceramic 0006 SL 120 500V 4010004070 Ceramic DD12 SL 221K 500V 4010003950 Ceramic 0006 SL 330K 500V 4010004010 Ceramic DD09 SL 101K 500V 4010003990 Ceramic 0009 51 680K 500V 4010003960 Ceramic DD06 SL 390K 500V 4010004040 Ceramic DD10 SL 151K 500V 4010003870 Ceramic 0006 SL 1208 4010003990 Ceramic 0009 51 680 500V 4040000250 Barrier Layer UAT 08X 473M 4040000250 Barrier Layer UAT 08X 473M 4040000250 Barrier Layer UAT 08X 473M 4040000250 Barrier Layer UAT 08X 473M UAT 08X 473M 4040000250 Barrier Layer UAT 08X 473M 4010000520 Ceramic 00108 472K 50V 4010000520 Ceramic 00108 472K 50V 4010000520 Ceramic 00108 472 50V 4010000520 Ceramic 00108 472K 50V 4010000520 Ceramic 00108 472 50V 4010000520 Ceramic 00108 472 50V 4610001120 CVSSC2001 4010000410 Ceramic DD107 SL 331J 50V 4010000410 Ceramic DD107 SL 331J 50V 4010000430 Ceramic DD109 SL 471J 50V 4010000430 Ceramic DD109 SL 471J 50V 4040000250 Barrier Layer UAT 08X 473M 4010000330 Ceramic 00105 SL 101 50V 4010000120 Ceramic 00104 SL 1000 50V 00105 SL 101 50V MZ 12HG 6330000180 Relay MZ 12HG 6330000180 Relay MZ 12HG 6330000180 Relay MZ 12HG
41. 004320 7010004170 7010004320 7010004320 7210000570 7010004320 7010001400 7010004450 D 2 Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Coil Coil Coil Coil Coil Coil Coil Coil Variable Resistor Variable Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Variable Resistor Resistor Resistor Resistor RD8 2E B2 155133 155133 155133 155133 155133 155133 155133 155133 155133 155133 155133 155133 155133 LAL 03NA 101K LAL 101 101 LAL 101 LAL 101 LAL 101 LAL 0 101K LAL 1018 RK124221002DA AF SQL RK1242210032A 10KB 10KB MIC RF PWR R20J 47 Q R20J 1 ELR20J 100 0 ELR20J 100 10 10 180 47 10 10 6800 10 10 RK1631110D5FA RIT R20J 10 R25J 100 820 100 4010000520 00108 472 50 5080000170 LED 7219 0 5510000300 Meter KL 218U 43 610 Switch Switch Switch Switch Switch Switch Switch Switch Switch SDDSA3159A POWER SPPH23079A SPPH23079A PRE SPPH23079A NB SPPH23079A AGC SPPH23079A LOCK SPPH23079A TRANSMIT 5 013 M CH UP
42. 010003780 7010003550 Resistor ELR20J 15 7010004320 Resistor 820 10 7010003810 Resistor ELR20J 2 2 MO 7010003780 Resistor ELR20J 1 7010003550 Resistor ELR20J 15 7010001400 Resistor R25J 100 ELR20J 220 ELR20J 100 ELR20J 220 ELR20J 100 Resistor Resistor Resistor Resistor 7010003700 7010003660 7010003700 7010003660 PLL UNIT 7010003660 7010004320 7010001280 7010004210 7010003530 7010003620 7010004450 7010003620 7010003620 7010004320 7010003620 7010003400 7010003400 7010003400 7010003400 7010003400 7010003400 7010001150 7010001150 7010001150 7010001150 7010001150 7010001150 7010005230 7010003430 7010003460 7010003490 7010003530 7010003480 7010004190 7010004190 7010001150 7010001150 7010001150 7010001150 7010001150 7010001150 7010004670 7010003530 7010003240 7010003660 7010003530 7010004030 7010003480 7010003440 7010003620 7010003620 7010004410 7010001400 7010004410 7010004410 7010004410 7010004410 7010001360 7410000180 7010003530 7010004410 7010003640 7210001530 7010003460 7010004070 7010004670 7010003400 7010003700 7010003440 7010001150 7010003660 7010003660 7010001060 7010004090 7010003660 7010003660 7010003310 7010003660 7010004450 Resistor Resistor Resistor Resistor Resistor Resistor Resistor
43. 010004030 Resistor R20J 47 Q 7010003440 Resistor 518204 2 2 7010003660 Resistor ELR20J 100 kQ 7010003660 Resistor ELR20J 100 80 7010001280 Resistor 825 10 80 7010004190 Resistor 820 1 kO 7010004270 Resistor 820 4 7 7010003480 Resistor ELR20J 4 7 7010001360 Resistor 825 47 7010004270 Resistor 820 4 7 7010003400 Resistor ELR20J 1 7010003360 Resistor ELR20J 4700 7010003460 Resistor ELR20J 3 3 7010004230 Resistor 820 2 2 7010003580 Resistor ELR20J 22 7010003530 Resistor ELR20J 10 7010001150 Resistor R25J 1 7010003480 Resistor ELR20J 4 7 7010003360 Resistor ELR20J 470 Q 7010003120 Resistor ELR20J 4 7 Q 7010004300 Resistor R20J 6 8 kQ 7010004320 Resistor R20J 10 7010003380 Resistor ELR20J 680 Q 7010004450 Resistor R20J 100 7010004320 Resistor R20J 10 7010003040 Resistor ELR20J 10 Ceramic DD108 472K 50V Barrier Layer UZE 08X 104M Ceramic DD107 SL 221J 50V Ceramic DD104 SL 470J 50V Ceramic DD107 SL 221J 50V Ceramic DD104 SL 150J 50V Ceramic DD106 SL 151J 50V Barrier Layer UAT 04X 222K Barrier Layer UZE 08X 104M Barrier Layer UAT 05X 332K Ceramic 00104 SL 030C 50V Cylinder 0 050 SL 150 00105 SL 121 50V DD108 472 50 DD108 472 50
44. 1 M CH DOWN SKHHAK013A VFO SKHHAK013A 1 RIT 1 MW FUNC SKHHAKO013A SPLIT SKHHAKO13A TUNER SKHHAJO25A BAND 25 MHz SKHHAJO25A kHz 5 013 AM FM 1 CW N 1 558 EC24B50B0013A MAIN 2230000120 2230000550 2230000550 2230000550 2230000550 2230000550 2230000550 2260000070 2260000070 2260000070 2260000070 2260000070 2260000070 2260000070 2260000070 2260000070 2260000060 2260000060 2260000060 2260000070 2260000070 2260000070 7600000100 Switch Switch Switch Switch Switch Switch Switch Switch Switch Switch Switch Switch Switch Switch 6910000630 Ferrite Bead MAIN UNIT ORDER NO 1790000050 IC 1110001310 IC DESCRIPTION ND487C1 3R 577 MAIN UNIT MAIN UNIT ORDER ORDER E e P 1110000330 1110001320 1110001320 1130003900 1110000890 1110000330 1110000330 1130003880 1180000470 1110000290 1120000970 1530000810 1580000100 1580000100 1530000810 1520000230 1590000340 1560000100 1560000130 1560000130 1590000360 1530000110 1590000340 1560000130 1560000130 Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Tra
45. 126 Noise blanker adjustment 35 adjustment C294 5 Sensitivity adjustment adjustment R138 Sensitivity pre setting Total gain adjustment Sensitivity adjustment 6 4 TRANSMITTER ADJUSTMENT ADJUSTMENT MEASUREMENT ADJUSTMENT POINT ADJUSTMENT CONDITIONS VALUE IDLING Displayed frequency 14 10000 MHz Unsolder W14 and CURRENT Mode connect the ammeter amp For drive TRANSMIT switch IN to the unsoldering transistors KEY jack No For final transistors points Unsolder PA UNIT 2 Unsolder R26 and connect the ammeter to the unsoldering PA AND FILTER UNITS R8 Idling current adjustment TL current 96 SWR detector adjustment FILTER UNIT 85 5 PA UNIT TRANSMITTER ADJUSTMENT CONTINUED ADJUSTMENT MEASUREMENT POINT ADJUSTMENT LOCATION UNIT ADJUST Rear Connect the RF 100 W Front MIC panel power meter to the panel control antenna connector ADJUSTMENT CONDITIONS Displayed frequency 14 10000 MHz Mode USB PWR control CW SWR 1 DETECTOR Connect a jumper wire between R87 front side and ground e MAIN Connect the DC FILTER C96 Apply an RF signal to the MIC voltmeter to J6 pin 2 See connector p 6 6 Level 10 mV 1 5 kHz Transmitting After adjustment remove the jumper wire f
46. 155133 6180000790 Coil LAL 03NA 1R5M 1710000160 Diode 155133 6180000900 LAL 101 1710000160 Diode 155133 6180000780 LAL 182 1710000160 Diode 155133 6180000770 Coil LAL 03NA 04 1710000160 Diode 155133 6180000760 LAL 03NA R82M 1710000160 Diode 155133 6180000760 LAL R82M 1710000160 Diode 1SS133 6180000900 Coil LAL O3NA 101K 1710000030 Diode 1S1555 6180000760 LAL O3NA R82M 1710000160 Diode 1SS133 6180000750 Coil LAL O3NA R68M 1710000160 Diode 155133 6180000750 Coil LAL 03NA 6180000740 LAL 03NA R56M 6180000900 LAL 101 2010000240 Filter 701 15 FL 71 6180000730 LAL 6 04 2010000270 Filter 9 15 1 23 6180000730 Coil 03NA R47M 2010000320 Filter 9M22D2 FL 30 6180000730 Coil LAL 03NA R47M 2010000950 Filter 9M6A1 FL 116 6180000730 Coil LAL 03NA R47M 6180000900 Coil LAL 03NA 101K 6180000700 Coil LAL 03NA R27M 6050001800 Crystal CR 49 6180000700 Coil LAL R27M 6180000710 Coil LAL 03NA R33M 6180000710 Coil LAL 03NA R33M 6140000080 Coil LR 20 6150001590 Coil LS 175 6180000700 Coil LAL 6150001470 Coil LS 163 6180000710 Coil LAL 03NA 6150001590 Coil LS 175 6180000860 Coil LAL 6170000140 Coil LW 15 6180000960 Coil LAL 6180000690 Coil LAL 03NA R22M 6140002050 Coil LR 224 6150001220 Coil LS 134 6150001770 Coil LS 19
47. 2nd LO signal to be converted to a 70 45 MHz IF signal at IC1 IC1 is used in receiving and transmitting The FM signal from the optional AM FM UNIT is amplified at Q22 and is then applied to IC1 The 70 45 MHz IF signal is amplified at the IF amplifier Q7 and is then converted to the displayed frequency at the balanced mixer Q2 Q3 4 4 gates of the IF amplifiers Q7 Q22 controlled by ALC bias voltage from ALC circuit R89 con nected to the gate of Q22 improves the temperature characteristics of the transmitter R85 adjusts the transmitter gain 4 2 4 RF CIRCUITS MAIN AND PA UNITS The converted signal from Q2 and is applied to the bandpass filter where the unwanted LO signal emission is reduced The converted signal is amplified at Q1 and is then applied to the PA UNIT via J11 Incoming signals from the MAIN UNIT are amplified at the predrive amplifier Q1 drive amplifier Q2 Q3 and power amplifier Q5 Q6 to obtain stable 100 W RF output power The predrive amplifier is a class A amplifier with a Vcc of 13 8 V The drive and power amplifiers are class AB push pull amplifiers with a Vcc of 13 8 V A stable bias voltage is applied to these amplifiers D1 controls a bias voltage to the drive amplifier Q4 D2 and 03 supply a bias voltage to the power amplifier A 0 012 Q resistor R26 inserted in the 13 8 V Vcc line is provided for the Ic circuit voltage generated at
48. 3 AS 134 ein 593 65 89 14 254 13 254 85 x 9 2 gt 238 af VP 5 5 51 Js HEP T er E H DI I L 5 25k125 oe oy NOSIJO ov IRX L S VIPRE AGCS J10 RX 2VIPRE OVISOL ON 034 932 202 100 TX RX 2 0V 130 950 2302498 1 4 69 2 22 5 x R22 3 3K RIES ISK 0181 0 047 3 189 19 15 C213 1000 TX RX 0 05v 5 TX RX 5 8 TX RX 2 8V 8 R54 10K 0 5 5 5 953 5 25 2458 5 2341048 TX OV 804008 3 209 RX 40V 5 4 7K 224 2 255 22 2 D 41204 d EM x TX 24V s er 6 D 218 150 remiss FOR ICH ICL 146 AMLC 520 8 36 29 20 22K 3 s Ve Ss 5 o 5 5 130P 100K 123 ISK 080 3 82 Rx 7 SV 0 3 UNIT NO SIGNAL 0 59 Y 10 V 3
49. 4010000520 Ceramic DD108 B 472K 50V 1530000110 Transistor 2502458 6 C7 4010000520 Ceramic 00108 472 50V 1590000350 Transistor RN1204 C8 4020000250 Cylinder 9 125 472 Transistor 2SC2458 GR C9 4020000250 Cylinder UP125 472M 1530000110 1730000180 1710000160 Diode 155133 5030000380 LCD HLC9599 01 3210 1710000160 Diode 155133 5040001290 LED SLP153B 1710000160 Diode 1SS133 5040001300 LED SLP253B 1710000160 Diode 1SS133 5080000170 LED HRS7219A Y2 30 1710000160 Diode 1SS133 5080000170 LED HRS7219A Y2 30 1710000160 1710000160 1710000160 1710000160 1710000160 1710000160 1710000160 1710000160 1710000160 1710000160 1710000160 1710000160 1710000160 6180000900 6180000900 6180000900 6180000900 6180000900 6180000900 6180000900 6180000900 7210001320 7210001550 7010004030 7010004190 7010003280 7010003280 7010004720 Resistor R50XJ 100 O 0910019544 P C Board B 1786D SW 7010004720 Resistor R50XJ 100 Q 0910019524 P C Board 17870 VR 7010003400 Resistor ELR20J 1 kQ 0910019550 Board 1868 5 7010003520 Resistor ELR20J 8 2 0910006330 Flexible Cable 792 7010003480 Resistor ELR20J 4 7 0910019931 1932 LED 7010003400 Resistor ELR20J 1 6910000630 Ferrite Bead FSOHO70RN 7010004250 Resistor R20J 3 3 6910000630 Ferrite Bead FSOHO70RN 7010004320 7010004320 7010004480 7010004410 7010004320 7010
50. 50V CVSSC2001 PLL UNIT ORDER Ceramic DD106 TH 820J 50V Ceramic DD108 B 472K 50V Ceramic DD108 B 472K 50V Ceramic 00106 8204 50V Tantalum DN 4 Barrier Layer UAT 05X 472K Ceramic DD104 B 102K 50V Ceramic DD104 B 102K 50V Ceramic DD104 B 102K 50V Ceramic DD107 SL 221J 50V Barrier Layer UZE 08X 104M Ceramic 00104 SL 080D 50V Ceramic DD108 B 472K 50V Ceramic DD104 SL 0R5C 50V Ceramic DD104 SL 080D 50V Ceramic DD108 B 472K 50V 4010000100 4010000520 4010000010 4010000100 4010000520 4040000260 Barrier Layer UZE 08X 104M 4040000260 Barrier Layer UZE 08X 104M 4510000310 Electrolytic 16 516 1000 12 5 16 4040000190 Barrier Layer 05 103 4040000190 Barrier Layer 05 103 05 103 0108 472 50V 00108 472 50 00108 472 UP125 471 05 103 00104 SL 300 50 00104 SL 220 50V 00104 SL 300 50 125 103 4040000190 4010000520 4010000520 4010000520 4020000180 4040000190 4010000210 4010000180 4010000210 4020000260 Barrier Layer Ceramic Ceramic Ceramic Cylinder Barrier Layer Ceramic Ceramic Ceramic Cylinder 4040000250 Barrier Layer UAT 08X 473M 4040000250 Barrier Layer UAT 08X 473M 4040000250 Barrier Layer UAT 08X 473M 3020000020 Lithium Battery BR2032 1T2 FSOHOSORN B 1789F 6
51. 6330000180 Relay MZ 12HG 6330000180 Relay MZ 12HG 6330000180 Relay MZ 12HG 6330000180 Relay MZ 12HG 6330000180 Relay MZ 12HG 6330000180 Relay MZ 12HG 6330000180 Relay MZ 12HG 6330000180 Relay MZ 12HG 6330000720 Relay DS1 M DC12V AG2013 FGB 4A S N5051 S N5051 OHD 3 90M 065 1210810 HMK2605 01 100 FSOHOSORN 6910000600 Ferrite Bead 1 6910000600 Ferrite 8680 FSOH050RN 6910000600 Ferrite Bead FSOHO50RN 6910000600 Ferrite Bead FSOHO50RN 6910000600 Ferrite Bead FSOHOSORN 0910019444 Board 17900 PA 0910018743 1791 FILTER FSOHOSORN SECTION 9 VOLTAGE DIAGRAMS 9 1 FRONT AND MAIN UNITS FRONT UNIT 185133 5 317 BAND m 2 09 Oo 39 Men DOWN 03 D De Qe E so De ons 034 038 037 2 MRS T219A Y2 30 H M SCAN 20 ETE 05 2 684 DISPLAY weg 031 HLC9599 0O 5210 S12 vFO RIT Cw N SW Or vFO 322 E e 314 FUNC pe SPLIT 15 pae TUNER m 0 65 96 23524508 RX OV LED OFF Rx 5 rv LED OFF RX OV LED ON
52. 8 6150001210 Coil LS 133A 6110001620 Coil LA 245 6180000900 Coil LAL 03NA 101K 6180000900 Coil LAL 03NA 6180000900 Coil LAL 101K 6140001460 Coil LR 170 6180000900 Coil LAL 101K 6140001260 Coil LR 151 6180000880 Coil LAL 03NA 100K 6180000740 Coil LAL 03NA 6180000950 Coil LAL 03NA 150K 6180000690 Coil LAL 03NA 6180000950 Coil LAL 03NA 150K 6150000990 Coil LS 114 6180000900 Coil LAL 03NA 101K 6150001770 Coil LS 198 6180000900 Coil LAL 101K 6150001770 15 198 6910000670 BTO1RN1 A61 001 6140002060 Coil LR 225 6180000900 Coil LAL 03NA 101K 6140002060 Coil LR 225 6180000900 Coil LAL 101K 6180000900 Coil LAL 03NA 6910000670 Coil BTO1RN1 A61 001 6150001640 Coil LS 180B 6180000900 Coil LAL 101K 6150000700 Coil LS 90A 6910000670 Coil BTO1RN1 A61 001 6150000700 Coil LS 90A 6180000900 Coil LAL 101K 6180000950 Coil LAL 03NA 6180000900 Coil LAL 101K 6150001590 Coil LS 175 6180000900 Coil LAL 101K 6150001590 Coil LS 175 6910000670 Coil BTO1RN1 A61 001 6140000640 Coil LR 86 6180000900 Coil LAL 03NA 101K 6140000060 Coil LR 18 6180002460 Coil LAL 02KR 150K 6110001650 Coil LA 248 6180000700 Coil LAL 6140002050 LR 224 7010004150 Resistor R20J 470 6180000880 LAL 7010003960 Resistor 820 120 6150001770 Coil 16 198 7010003360 Resistor ELR20J 470 Q 6150002430
53. 9 lt Regional Customer Service Centers gt 3150 Premier Drive Suite 126 Irving TX 75063 U S A Phone 214 550 7525 Fax 214 550 7423 1777 Phoenix Parkway Suite 201 Atlanta 30349 U S A Phone 404 991 6166 Fax 404 991 6327 Canada Division of Icom America Inc 3071 5 Road Unit 9 Richmond B C V6X 214 Canada Phone 604 273 7400 Fax 604 273 1900 lcom Europe GmbH Communication Equipment Himmelgeister Str 100 4000 D sseldorf 1 W Germany Phone 0211 346047 Fax 0211 333639 Telex 8588082 ICOM D Icom Australia Pty Ltd Incorporated in Victoria 7 Duke Street Windsor Victoria 3181 Australia Phone 03 529 7582 Fax 03 529 8485 Telex AA 35521 ICOM AS Icom UK Ltd Unit 9 Sea St Herne Bay Kent U K Phone 0227 363859 Fax 0227 360155 Telex 965179 ICOM G Icom France Sa 120 Route de Revel BP4063 31029 Toulouse Cedex France Phone 61 20 31 49 Fax 61 34 05 91 Telex 521515 ICOM FRA Count Icom Inc A 5029H S 6 9 16 Kamihigashi Hirano ku Osaka 547 Japan Printed in Japan Copyright 1989 by Icom Inc
54. 910000600 0910019436 Ferrite Bead P C Board DDS UNIT ORDER 1140000500 IC 501051 1130002600 IC 501052 1053 TC74HCT374F IG TC74HCT374F 1130002610 1130002460 1130002460 CR 180 6050003230 Crystal Coil LQN 5N 331K Coil LQN 5N 331K Coil LQN 5N 331K 6200000040 6200000040 6200000040 7030000740 7030000360 7030000420 7410000320 7030000500 7030000500 7030000500 MCR10EZHJ 1 105 MCR10EZHJ 680 681 MCR10EZHJ 2 2 222 GF 5096 MCR10EZHJ 10 103 MCR10EZHJ 10 KQ 103 MCR10EZHJ 10 103 Resistor Resistor Resistor Resistor Array Resistor Resistor Resistor DDS UNIT 4030000750 4030000640 4030000720 4030001150 4030001150 4030001150 4030001150 4030002430 4030001100 4030001100 0910022511 PA UNIT 1530000790 1530000190 1530000190 1540000200 1530000200 1530000200 1520000060 1590000340 1590000340 1590000360 1790000010 1790000010 1790000010 1710000010 1710000030 1710000030 1710000330 1710000330 1710000030 1710000030 1710000030 1710000030 1710000030 1710000030 1710000030 6140001170 6910000670 6910000670 6140001300 6140000610 6140001310 6140001210 6180001230 6180001570 6910000670 6910000670 6180000880 6910000670 6910000670 6910000670 8 11 Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ce
55. Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000050 Diode 15553 1710000050 Diode 15553 1710000050 Diode 15553 1710000050 Diode 1SS53 1710000050 Diode 1 53 1710000050 Diode 1SS53 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 51606 155133 1710000160 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000160 Diode 155133 1710000040 Diode 15953 1710000050 Diode 15553 1710000160 Diode 155133 1710000160 Diode 155133 1710000050 Diode 15553 1720000050 Varicap 15 50 1710000050 Diode 15553 1720000050 15 50 1710000050 Diode 15553 1720000050 Varicap 15 50 1710000050 Diode 15553 1720000050 Varicap 15 50 PLL UNIT E 029 DESCRIPTION 1710000050 Diode 18553 1720000050 1SV50E 1710000160 Diode 1SS133 1710000160 Diode 155133 1710000160 Diode 188133 Diode 15553 1710000050 CSA4 91MG CR 21 6060000120 6050001520 Crystal Crystal 6180000880 Coil LAL 100K 6140000580 Coil LR 79 6130000990 Coil LB 135 6170000180 Coil LW 19 6140000580 Coil LR 79 6130000990 Coil LB 135 6170000180 Coil LW 19 6140000580 Coil
56. EFERENCE OSCILLATOR X2 286 LO 61 44 MHz 30 72 MHz Fig 6 4 4 LOGIC CIRCUITS 4 4 1 BAND SELECTION DATA PLL UNIT To select the correct bandpass filter the low pass filter VCOs on the MAIN and PLL UNITS the CPU outputs the following data BAND vco VOLTAGE VCO1 sv u s 14 VCO2 FREQUENCY 2 0 5 1 599 R29 R40 029 035 convert the 7 signals into a band voltage 0 7 5 V for external equipment 11 0 14 999 15 0 21 999 VCO3 4 4 2 CPU PLL UNIT The CPU IC8 contains an 8 bit CMOS CPU 16k byte ROM and 256 byte RAM The CPU controls operating frequency mode and the function display etc The memory contents are stored in the CPU using a lithium backup battery for more than 5 years Icom network system allows that the IC 725 be remotely controlled by a personal computer using an RS 232C signal line 4 4 3 RIT CIRCUIT PLL UNIT IC12 is an AID converter which outputs 8 bit serial data regarding analog input voltage A voltage controlled by the RIT control is applied to IC12 pin 4 and the resulting serial data is applied to the CPU matrix Y4 DB4 4 4 4 KEY MATRIX Y0 Y1 Y2 Y3 Y4 DB0 DB1 CI V BUS CHECK X LCD DRIVER EM 2 lt kHz SQL DB2 lt N RIT 49 AM FM RIT DATA X
57. ELR20J 15 ELR20J 4700 ELR20J 47 ELR20J 220 Q ELR20J 10 2 ELR20J 1 2 ELR20J 10 820 22 ELR20J 150 Q 25 1000 UNIT ORDER Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Ceramic Ceramic Electrolytic Ceramic Ceramic Ceramic Cylinder Electrolytic Electrolytic Tantalum Tantalum Barrier Layer Ceramic Ceramic Tantalum Electrolytic Barrier Layer Electrolytic Capacitor Array Ceramic Capacitor Array Barrier Layer Barrier Layer Ceramic Electrolytic Ceramic Electrolytic Ceramic Barrier Layer Ceramic Ceramic Trimmer Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Trimmer Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Trimmer ELR20J 10 kQ ELR20J 10 ELR20J 10 kO ELR20J 10 ELR20J 47 R20J 47 R20J 4700 R20J 10 kQ R20J 1 ELR20J 470 Q ELR20J 4700 ELR20J 470 Q ELR20J 1 ELR20J 3 3 ELR20J 680 R20J 10 DD104 102K 50V DD104 B 102K 50V 50 MS7 R47 uF 00108 4728 00104 1028 50V 00104 8 1028 50V UP050 8 1028 F2D 50V 102K 16 MS7 10 uF 16 MS7 10 DN 1V 010M DN 1C 2R2M UZE 08X 104M DD105 CH 300J 50V DD105 CH 300J 50V DN 1C 2R2M 25 SS 47 uF UZE 08X 104M 16 SS 100 uF
58. F DD108 B 472K 50V 25 SS 47 UZE 08X 104M DD104 B 102K 50V 16 57 10 uF UAT 05X 103K 16 MS7 10 50 MS7 1 00108 472K 25 SS 47 00105 SL 101 00106 81 151 00108 B 472K 50V DD108 B 472K 50V UZE 08X 104M DD108 B 472K 50V DD108 B 472K 50V DD107 SL 221J 50V 50 MS7 R22 pF UAT 08X 473M 00108 472K 50V DD108 B 472K 50V DD106 SL 151J 50V 00104 SL 2201 00108 8 472K 50 20108 472K 50V DD108 B 472K 50V 00108 8 472K 50V MAIN UNIT Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Barrier Layer Barrier Layer Barrier Layer Barrier Layer Barrier Layer Cylinder Barrier Layer Barrier Layer Barrier Layer Barrier Layer Ceramic Barrier Layer Barrier Layer Ceramic Ceramic Barrier Layer Ceramic Barrier Layer Barrier Layer Barrier Layer Barrier Layer Barrier Layer Ceramic Ceramic Ceramic Ceramic Barrier Layer Barrier Layer Barrier Layer Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Barrier Layer Ceramic Capacitor Array Ceramic Electrolytic ORDER 00108 472K 50V DD104 51 220 50V 00108 472K 50V DD104 102K 50V DD108 B 472K 50V DD108 472
59. F PWR control is also applied to 11 pin 3 as the reference voltage When the FOR voltage exceeds the voltage ALC bias voltage from 1 11 pin 1 controls the IF amplifiers to reduce the output power until the FOR and POC voltages are equalized in AM mode 1 11 operates as an averaging ALC amplifier because a capacitor on the optional AM FM UNIT C51 is connected to the cathode of 076 054 turns ON and the voltage is shifted for 40 W AM output power maximum The ALC bias voltage from IC11 pin 1 is also applied to the inversion amplifier IC11 pin 6 to control an intensity of the TX indicator showing the ALC level An external ALC input from the ALC jack is applied to the buffer amplifier Q53 ALC operation is identical to that of the internal ALC 4 2 7 CIRCUITS MAIN UNIT The APC circuits protect the final transistors from high SWR and excessive current The REF voltage from the PA UNIT is applied to Q56 When the REF voltage exceeds the reference voltage determined by R203 and R204 Q56 turns ON and the voltage is shifted for 12 W output power The ICH and ICL voltages are applied to the amplifier IC10 pins 5 and 6 and then to the ALC bias voltage line to prevent excessive current flow 4 2 8 CW KEYING CIRCUIT MAIN UNIT When the CW key is closed the KEY signal line becomes LOW 338 outputs 8 V to control break in operati
60. H MAIN UNIT The AF signal from a detector circuit or the optional AM UNIT is applied to the AF input mode selector switch IC8 1C8 consists of 4 analog switches and they are selected with a mode signal from 1015 and the squelch control signal The AF signal is applied to the AF amp circuit 1 8 INPUT MODE SELECTOR SWITCH umm PIN NUMBERS NUMBER for S meter 5 AND SQUELCH CIRCUIT 5 S meter Squelch signal 8V Signal signal indicator SQUELCH CIRCUIT 4 1 10 AMP CIRCUIT MAIN UNIT The AF signal from the AF input mode selector switch is applied to the preamplifier Q35 336 The CW sidetone signal is applied to Q36 The output from the AF preamplifier is applied to the AF control FRONT UNIT R1 b and the 2 8 kHz cut off active low pass filter 037 signal is power amplified at IC9 to drive the speaker 4 1 11 AGC AND S METER CIRCUIT MAIN UNIT The receiver gain is determined by the voltage on the AGC line Q30 collector When strong signals are received the AGC circuit decreases the voltage on this line The signal from the amplifier 029 passes through C117 is detected at D59 and D60 and applied to the base of Q30 A time constant C113 R120 is connected to the AGC line that determines the AGC release time The time constant is controlled by the switch When the AGC switc
61. K 50V DD104 SL 060D 50V UAT 04X 122K UAT 05X 682K RAU 08SA 821K 06X 153K UAT 04X 152K UAT 04X 102K UP050 8 101K UAT 04X 102K UAT 08X 473M UZE 08X 104M UZE 08X 104M DD108 8 472K 50V UAT 04X 152K UAT 04X 222K DD107 SL 331J 50V DD108 B 472K 50V UAT 04X 122K DD106 SL 181J 50V UAT 04X 122K UAT 04X 222K UAT 06X 153K UAT 04X 122K UAT 08X 473M 00108 472K 50V DD109 SL 511J 50V DD105 SL 101J 50V DD109 SL 471J 50V UAT 04X 122K UAT 05X 562K RAU 08SA 821K UAT 08X 473M 00108 472K 50V DD107 SL 331J 50V 00104 SL 510J 50V DD107 SL 331J 50V DD107 SL 331J 50V UAT 05X 272K DD107 SL 331J 50V UAT 08X 473M 00108 472K 50V 00107 SL 331J 50 DD104 SL 470J 50V DD107 SL 221J 50V DD107 SL 221J 50V UAT 04X 182K 00106 SL 201 50 UAT 08X 473M 00108 472K 50V DD107 SL 221J 50V DD104 SL 180J 50V DD105 SL 101J 50V DD107 SL 221J 50V UAT 04X 122K 00106 SL 151 50 UAT 08X 473M 00108 472K 50V DD104 SL 330J 50V DD105 SL 121J 50V 00104 SL 390J 50V DD104 SL 680J 50V DD105 SL 1214 50V RAU 08SA 821K DD105 SL 101J 50V UAT 08X 473M DD108 B 472K 50V 82 0111 32 00108 472 50 16 SS 470 uF 10 12 5 MAIN UNIT 4040000260 4510003040 4510000310 Barrier Layer Electrolytic Electrolytic 4510002640 4510002730 4040000250 4510001140 4510002730 4040000110 4310000060 4510001100 4510002640 4510001170 4040000150 4510001150
62. K1110AEGA 8 ELR20J 3 3 820 100 Q R50XJ 22 Q ELR20J 1 ELR20J 220 ELR20J 2 2 R25J 1 ELR20J 100 ELR20J 100 R25J 1800 R20J 150 Q ELR20J 100 ELR20J 100 ELR20J 180 0 ELR20J 100 820 100 PLL UNIT 7010003310 7010003660 7010003660 7010003310 7010004090 7010004250 7010004090 7010004250 7010003300 7010004250 7010003300 7010003460 7010003780 7010003780 7010003360 7010003530 7010000990 7010003480 7010004110 7010003340 7010003990 7010003580 7010004070 7010003200 7010003320 7010003330 7010003980 7010003330 7010001150 7010001150 7010004190 7010001070 7010003480 7010003280 7010004150 7010003620 7010003420 7010004110 7010003360 7010004110 7010001150 7010004190 7010004190 7010001230 7010003160 7010003580 7010003660 7010004090 7010003440 7010003530 7010003480 7010003340 7010004110 7010003280 7010003240 7010003280 7010003530 7010004070 7010004190 7010003600 7010003440 7010003280 7010004190 7010003480 7010003550 7010003360 7010003240 7010003320 7010003530 7010003410 7010003530 7010004370 7010003300 7010001030 7010003530 Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor
63. L AND UNITS PLL UNIT LIS 100 00 220 6 27 865 car 0 0047 0 0047 4 7 i 220 PS T x ozs MAIN CN Hr C92 14 256 LA 236 55 zsczees 41 6 wr p s 5 0 001 x N mor cas 15 ei 9 4 5 D 66 a H HIE x 5 pu D k 5 5 22v 33 5 au t l wt fez aw TL E SES cos Deeg E 2 0 fee Lt ws Bee 1 z as ME 7 2 5 128 129 123 7 4 mos cios 022 O 279M ee j ar R 5 D 25 01 7 gt 175 19 2562660 54 pe ZLO m 9 6 UNIT Y VJ 7 2v ue 8 23 18 v 7 25c2668 s uo V lt 52 s v 2 8 lt 2 R 2 15 8 25 5 5 5 3 Se ir 95 3 x gt 2 0 1 85 55 5 an ME ES 5 Dom 2
64. LR 79 6130000990 Coil LB 135 6170000180 Coil LW 19 6140000580 Coil LR 79 6130000990 Coil LB 135 6170000180 Coil LW 19 LAL 03NA 101K LAL 03NA 101K LAL R56M Coil Coil Coil 6180000900 6180000900 6180000740 6110001560 Coil LA 236 6110001560 Coil LA 236 6110001550 Coil LA 235 6180000900 Coil LAL 101K 6180000880 Coil LAL 100K 6180000720 Coil LAL 03NA R39M 6180000700 Coil LAL R27M 6180000690 Coil LAL R22M 6180000960 Coil LAL 102K 6180000900 Coil LAL 101K 6180000900 Coil LAL 01 101K 6180000900 Coil LAL 101K 6110001650 Coil LA 248 6170000180 Coil LW 19 LAL 03NA 4R7K BTO1RN1 A61 001 6180000850 6910000670 Coil Coil 6170000180 Coil LW 19 6150000760 Coil LS 94 6180000900 Coil LAL 03NA 101K 6180000900 Coil LAL 101K 6150000990 Coil LS 114 6150000990 Coil LS 114 6910000670 Coil BTO1RN1 A61 001 6110001640 Coil LA 247 6180000880 Coil LAL 03NA 100K LAL 03NA 101K BTO1RN1 A61 001 LAL 031 102K BTO1RN1 A61 001 LAL 101K LAL O3NA 102K LA 236 LAL 03NA 102K LAL 03NA 102K Coil Coil Coil 6180000900 6910000670 6180000960 6910000670 6180000900 6180000960 6110001560 6180000960 6180000960 Resistor ELR20J 1 7
65. P Rotary encoder 0 8610004700 8610004710 2230000120 8610004720 8610004730 6510000190 7600000100 8610003850 Button K98 TRANSMIT 7210000570 Variable resistor RIT 8610004741 Button K122 1 LOCK Button K123 1 NB ATT PRE AGC Connector PHONES 6450000810 J4306 01 3070 8610004751 Dial N104 A incl rubber ring and screw 21 12 Screw abbreviations head Flathead 80 B1 Self tapping screw ZK Black Nickel Brass Variable resistor AF SQL 700 RK124221002DA 8610004760 Variable resistor MIC RF PWR 1210091550 RK1242210032A Variable resistor RIT 1210001530 RK09K1110AEGA 98 888 88813 22202085 08 088 80 88 PA UNIT LABEL NUMBER DESCRIPTION NO as T 5 5 e 9 r ww r Fat wasnermenies z 6 1 Lannen 1 connector WROSEGH 001 r soms power sorne Screw abbreviations Pan head 1 Self tapping screw Nickel BS Brass ACCESSORIES ORDER DESCRIPTION 24 by
66. R 158 LA 196 LA 197 LAL 101 LAL 101 LAL 101 LAL 03NA 101 LAL 03NA 101K LAL 03NA 101K LAL 03NA 101K LAL 101K LAL 03NA 100K LAL 03NA 100K LAL 031 100K LAL 03NA 100K LAL 03NA 101K LR 170 LR 163 ELR25J 330 Q R25J 1500 ELR25J 220 ELR25J 470 Q R50XJ 470 820 270 R50XJ 120 Q RH0651C12J04A 101 R25J 47 Q R25J 47 Q R50XJ 120 Q R50XJ 120 Q R50XJ 10 Q RSS1P 3R3 O RSS1P 3R3 Q RSS1P 383 O RSS1P 383 Q R50XJ 1200 RH0651C13J1YA 102 R50XJ 100 R50XJ 100 RSS1P RSS1P 66200 R 02J 4 7 487 ELR25J 1 CP 5AJ 0 012 Q ELR25J 1 825 330 820 4700 R20J 1 ELR20J 5 6 ERT D2FHL503S ELR20J 39 R20J 39 O 820 820 820 4 7 ELR20J 15 ELR20J 100 R20J 4 7 ELR20J 15 ELR20J 100 DSA 301LA R20J 33 7010004310 7010003520 4010000520 4010000510 4040000250 4040000250 4040000250 4040000250 4310000110 4310000110 4010000380 4040000250 4010000500 4030001370 4030001370 4040000250 4040000250 4510002720 4030001340 4010000420 4010004070 4320000220 4030001340 4010004070 4510002640 4010000520 4510000310 Resistor Resistor Ceramic Ceramic Barrier Layer Barrier Layer Barrier Layer Barrier Layer Mylar Mylar Ceramic Barrier Layer Ceramic Ceramic Ceramic Barrier Layer Barrier Layer Electrolytic Ceramic Cerami
67. R20J 1 7010003400 Resistor ELR20J 1 7010003360 Resistor ELR20J 4700 7010003360 Resistor ELR20J 470 7010003530 Resistor ELR20J 10 7010004030 Resistor R20J 470 7010004090 Resistor R20J 1500 7010001530 Resistor 25 1 7010003990 Resistor 820 220 7010004090 Resistor 820 150 Q 7010000990 Resistor 825 470 7010003440 Resistor ELR20J 22 7010004230 Resistor R20J 2 2 7010004030 Resistor 20 470 7310000760 Trimmer RH0651CJ4J01A 223 7010004070 Resistor R20J 1000 7010004950 Resistor R20J 1 5 7010003360 Resistor ELR20J 4700 7510000100 Thermistor ERT D2FGL601S 7010003530 Resistor ELR20J 10 kQ 7010004030 Resistor 820 47 7010003340 Resistor ELR20J 330 7010001110 Resistor 825 4700 7010000330 Resistor ELR25J 470 Q MAIN UNIT ORDER 7010004070 Resistor R20J 100 Q 7010004070 Resistor R20J 100 Q 7010004070 Resistor R20J 100 Q 7010004070 Resistor R20J 100 Q 7010004070 Resistor R20J 100 Q 7010004070
68. Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor ORDER ELR20J 180 Q ELR20J 100 ELR20J 100 ELR20J 180 R20J 150 6 820 3 3 820 150 6 820 3 3 ELR20J 150 Q 820 3 3 ELR20J 150 Q ELR20J 3 3 ELR20J 1 ELR20J 1 ELR20J 470 Q ELR20J 10 825 470 ELR20J 4 7 820 2200 ELR20J 330 820 220 ELR20J 10 ELR20J 22 820 100 Q ELR20J 22 Q ELR20J 220 Q ELR20J 270 Q R20J 180 ELR20J 270 Q 825 1 825 1 820 1 R25J 2200 ELR20J 4 7 ELR20J 100 Q 820 470 O ELR20J 47 ELR20J 1 5 R20J 220 Q ELR20J 470 Q R20J 220 Q 25 1 820 1 20 1 825 4 7 ELR20J 10 Q ELR20J 22 ELR20J 100 820 150 ELR20J 2 2 ELR20J 10 ELR20J 4 7 ELR20J 330 Q R20J 220 Q ELR20J 100 Q ELR20J 47 ELR20J 100 Q ELR20J 10 R20J 100 Q R20J 1 ELR20J 33 ELR20J 2 2 ELR20J 100 R20J 1 ELR20J 4 7
69. S POwER 8 2K 1 1 1 R23 bid d Vay 1 5 77 57 E hamse 1P 2 4msec SPIN 1C1 8 12Pin of Scanning the wave form DI 4 13 di PHONES 1 sic 8 5 5 a 5 z 5 2100682 a 695 Hee oR 58 E 8 5 atte BE ak 59 5 wh A 4 6 X wore man 5 x sa RA H 5 6 2 2 2 5 75 E o g x s i 0 0082 7 TX RX 3 8v 4 00 0 8022 I9v iNHiOAg 61 5 IJa 50 Il 412 17 lt 1 P 3 30 3 n wer ep sk at rk ck RN foN 5 io ad nbi 25086 if in i i b 1 5 H a 19 5 6 33 22K 22 xL eg ale X 50 0033 2 5 E C5 2 1 s 33 74 CRISP 12 5 0 5 030 15553 csa TX OV 0 047 12 PRE Re 47 13
70. SSB CW filter FL 30 Main loop VCOs Phase detector Prescaler Sub loop VCO DDS UNIT LO circuit Reference crystal X2 21 30 72 Divider 15 M74ALS74AP Preamplifier Space for 7 FM UNIT APCIALC circuit BFO circuit SSB modulator IC6 1037 Product detector 1 5 1037 x Rx 2nd IF amplifier 9 01 MHz filter FL 116 PA AND FILTER UNITS switching relay RL13 DS1 M DC12V SWR detector circuit Tx low pass filters Bias control Q4 2SD1406Y Predrive amplifier Q1 2SC1971 Drive amplifier Q2 Q3 2SC3133 Final amplifier Q5 06 25 2904 switch 51 OHD 3 90 lt O lt 6 Y O 2 e SECTION 3 340438 OSA ANOD 20 20 AS 552 8 951 690yQdm 13 240980 2451 AN05 Qv 05435 9100909 1 28060904 221 284090447 121 2 SAW 9091052 r 062252 Sep AW asia 7845 80 596852 20 SAW 19 gx 1 2SZ Size ALOWESOH 1461252 50 inv LINN vd U 0 pr gt zx 8622252 9992252 70 YZ6IXSZ 625 SOA 2 62 9121 LINN 8992252 8892252 919182 25925 1161252 i
71. UNIT 1786 FRAME DISASSEMBLY ORDER r ORDER DESCRIPTION 3 DESCRIPTION 8110003270 Top cover 8930000720 Thread 8110003280 Bottom 8930013990 610 Brake plate 8930002900 Rubber foot A 8930014030 610 Brake pat 8930005790 Foot 8930013940 610 Brake sheet 8930005800 Foot B 8810001110 M3x6 8010001520 Stand 8810005470 M2 6x 14 ZK 8810005520 B1 M3x8 ZK 8810001650 M3x6 8810005540 81 4 10 8810001320 1 M2 6x6 Ni 8010007851 610 Chassis 1 8510001330 79 shield case 8810001350 PH B1 M3x6 8510001340 79 shield case cover 8810002160 FH M3x5 8510001060 Shield case 8810003670 ICOM screw A 6 8510001740 Shield case cover 8810005510 FH M3x6 ZK BS 8510000881 194 VCO case 1 8210004670 610 Front panel B 8510003460 194 VCO case cover A 8610004640 Button K119 VFO 8510000230 220 shield case 8610004650 Button K119 A SPLIT 8510002200 VCO case 8610004660 8510000881 194 VCO case 1 Button K119 B UP Button K119 C MEMO Button K119 D MW Button K119 E DOWN Button K119 F FUNC Button K119 G RIT TUNER Button K120 SSB CW N AM FM Button K121 kHz MHz BAND 8610004670 8510002690 PA shield case B 8610004680 8510004360 PA shield case B cover A 8610004690 8510005310 DDS shield case 8510005320 DDS shield case cover Switch POWER SDDSA3159A Connector FM214 8SS
72. blanker gate prevents PLL click noise 4 1 7 BFO CIRCUIT MAIN UNIT A 9 MHz signal oscillated at the BFO circuit Q31 X1 is buffer amplified at Q42 and used at the balanced modulator IC6 and a product detector IC5 The BFO frequency is shifted with a mode signal using 067 069 In USB mode the USB signal line becomes HIGH turning 069 frequency is then adjusted with C294 to set the USB carrier point CW mode transmitting the signal line becomes HIGH and 933 becomes OFF turning ON 068 frequency is then adjusted with L83 to set the CW transmit carrier point In LSB mode the LSB signal line becomes HIGH turning ON D67 The frequency is then adjusted with L82 to set the LSB carrier point to optional AM FM UNIT BFO FREQUENCY IN EACH MODE FREQUENCY MHz CW s 4 1 8 DEMODULATOR CIRCUITS MAIN UNIT The IC 725 has 2 detector circuits a product detector and a diode detector to demodulate the SSB CW signal and AM signal respectively In SSB or CW mode the 2nd IF signal from the IF amplifier Q29 is mixed with the BFO signal at the product detector IC5 to demodulate the 2nd IF signal into an AF signal The detected signal passes through the AF input mode selector switch 8 in AM mode the 2nd IF signal from Q29 passed through C121 is detected at D62 and passes through the AF input mode selector switch 8 4 1 9 AF INPUT MODE SELECTOR SWITC
73. c Ceramic Dip Mica Ceramic Ceramic Electrolytic Ceramic Electrolytic 4040000260 4010000380 4040000250 4510000310 Barrier Layer Ceramic Barrier Layer Electrolytic 4040000250 4040000260 4010000380 4010000520 4510002780 4010000520 4510002440 4040000250 4010000520 4010000520 4030001340 4510002640 4010000520 4320000290 4010004040 4010004100 4320000330 4010004030 4320000290 4010004070 4010004050 4010004040 4010004070 4320000280 4010003990 4010004070 4010004070 4010004070 4010004070 4010004050 4010004010 4010004070 4010004070 4010004070 4010003950 4010004070 4010004050 4010004030 4010004000 4010003930 8 12 Barrier Layer Barrier Layer Ceramic Ceramic Electrolytic Ceramic Electrolytic Barrier Layer Ceramic Ceramic Ceramic Electrolytic Ceramic Dip Mica Ceramic Ceramic Dip Mica Ceramic Dip Mica Ceramic Ceramic Ceramic Ceramic Dip Mica Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic R20J 8 2 ELR20J 8 2 DD108 B 472K 50V DD106 B 222K 50V UAT 08X 473M UAT 08X 473M UAT 08X 473M UAT 08X 473M F2D 50V 472K F2D 50V 472K DD107 SL 221J 50V UAT 08X 473M DD104 B 102K 50V GR44 CH 682K GR44 CH 682K UAT 08X 473M UAT 08X 473M 10 SS 47
74. ctor switch This signal is applied to Q34 turning OFF the RX indicator and is also applied to the MIC connector pin 4 4 2 TRANSMITTER CIRCUITS 4 2 1 MIC AMPLIFIER MAIN UNIT Audio signals from the MIC connector are applied to the MIC contro and amplified at the mic amplifier Q45 External modulation input from the ACC 1 socket 4 is also applied to Q45 via R255 AF signals from 045 CW keying signal is applied to the balanced modulator 344 cuts the signals from Q45 in CW or receiving 4 2 2 BALANCED MODULATOR MAIN UNIT Output signals from the mic amplifier or CW keying signal are applied to the balanced modulator circuit IC6 to be converted to a 9 MHz IF signal using a BFO signal The BFO signal buffer amplified at Q42 is applied to 6 pin 7 as a carrier signal 6 outputs a double sideband signal and passes through a 9 MHz filter to create an SSB signal 8177 and R179 adjust the balance level of IC6 for maximum carrier suppression CW mode the CW keying signal upsets the balance to create a carrier signal 4 2 3 IF CIRCUITS MAIN UNIT The 9 MHz IF signal passes through one of the three 9 MHz filters where unwanted sideband or out of band signals are removed The filters are selected with mode selecting signals and the T8 voltage line The optional CW narrow filter is not used in transmitting The resulting signal is amplified at Q22 and is then mixed with the
75. e bandpass filter and is then applied to the MAIN UNIT via P4 as the 2nd LO signal 4 3 3 MAIN LOOP PLL UNIT The main loop uses a PLL 13 which contains programmable divider phase detector data shift register and data latch circuits The main loop generates 70 9515 100 4515 MHz signals in 512 kHz steps 4 6 Because the sub loop produces 10 Hz steps the PLL produces a 30 MHz frequency range in 10 Hz steps The oscillated signal at one of the 4 VCOs 015 017 Q19 Q21 see Section 4 3 4 for details is amplified at Q23 The signal is mixed with the sub loop output 62 05 62 56199 MHz at 16 023 is an isolator which ensures that the mixer input does not affect the VCO output The mixed signal is amplified at Q27 and is then filtered at the low pass filter L23 L25 C92 C93 99 103 The filtered signal amplified at Q26 is divided by 4 at IC14 and is then applied to the PLL IC IC13 The phase of the divided signal at 14 detected at the PLL IC IC13 using a reference frequency of 512 kHz is then output from pin 17 The 512 kHz frequency is obtained from the reference oscillator Q33 30 72 MHz oscillated at Q33 is divided by 2 at IC15 and divided by 30 at the programmable divider section of 1013 The phase detected signal is then converted to the lock voltage at the loop filter 012 014 and applied to the VCO Thus the VCO output PLL output is locked to produce stable
76. gnal generator Level 0 16 pV 123 dBm Modulation OFF e Receiving Connect the AC milli Pre set to max CW voltmeter to the EXT SP jack with 8 load Maximum audio output L33 L34 135 136 116 117 121 122 123 179 178 177 level e Set the signal generator Level OFF Displayed frequency 14 10000 MHz Rear Connect the AC milli 1 0 V 0 dB Front AF Mode USB panel voltmeter to the panel control e PRE switch OFF EXT SP jack with e Set the signal generator an 8 Q load 1 Level 1 0 mV 47 dBm Modulation OFF Displayed frequency 14 10000 MHz Front MAIN e Mode USB panel e PRE switch OFF e Set the signal generator Level 50 pV 73 dBm Modulation OFF e Receiving Get the signal generator S9 60 dB R110 Level 50 13 dBm Repeat above adjustments 1 and 2 a couple of times RECEIVER ADJUSTMENT CONTINUED ADJUSTMENT ADJUSTMENT CONDITIONS LOCATION UNIT ADJUST NOISE e Displayed frequency 14 10000 MHz MAIN Connect the Adjust for maximum MAIN L25 L26 BLANKER Mode USB oscilloscope to the waveform on the NB switch ON cathode of D13 oscilloscope Apply an RF signal including the following pulse noise to the antenna connector RF signal level 3 2 pV 97 dBm Receiving MAIN UNIT D13 Noise blanker R266 182
77. h is pushed OUT C112 and R119 are connected in parallel with the AGC line to obtain a slow AGC release time The bias voltage is applied to the differential amplifier IC4 pin 6 where the difference between the bias and reference voltages is detected The resulting S meter signal passes through the meter switching circuit 8 and is then applied to the meter on the front panel The reference voltage is adjusted with R116 1 8 pins 8 and 9 are connected inside the IC in receiving The FM S meter signal from the optional AM FM UNIT is applied to the meter switching circuit IC8 via D57 The signal is also applied to the squelch circuit IC4 pin 2 AGC switch 6 CIRCUIT 1 voitage 05 OUT short bo 1 1 1 1 C7 IF si I from Q29 1 1 S METER CIRCUIT 4 1 12 SQUELCH CIRCUIT MAIN UNIT The squelch circuit mutes the audio output when the S meter signal is lower than the SQL control setting level The S meter signal 1 4 7 is applied to the 4 2 to compared to threshold level controlled by the SQL control squelch control signal is applied to control terminals of the AF input mode selector switch 108 When the S meter signal is lower than the threshold level the comparator turns HIGH and then Q32 turns OFF to deactivate the AF input mode sele
78. ing 2 After adjustment remove the resistor from P5 and re plug P5 RIT control 1 Displayed frequency 14 10000 MHz Top Speaker Pre set to center Front e Mode USB cover panel Set the signal generator Level 50 pV 73 dBm Modulation OFF RIT switch ON and OFF Same tone pitch on both conditions Receiving PLL AND DDS UNITS R77 1st LO lock voltage R70 RIT adjustment 1st LO lock voltage adjustment R133 DDS loop CP 30 DDS loop adjustment PLL UNIT DDS UNIT C1 DDS clock adjustment IC4 pin 11 or IC5 pin 11 DDS clock CP C134 Reference frequency pre setting L35 Reference frequency 139 P4 Reference frequency CP 6 3 RECEIVER ADJUSTMENT ADJUSTMENT BFO FREQUENCY SENSITIVITY TOTAL GAIN S METER ADJUSTMENT MEASUREMENT POINT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST Displayed frequency 14 10000 MHz Connect the 9 01300 MHz MAIN C294 Mode USB frequency counter to e Receiving R266 9 01060 MHz L83 e Transmitting Mode 9 01000 MHz Receiving 9 00980 MHz 150 2 CW AM Mode e Displayed frequency 14 10000 MHz Rear Mode USB panel RIT switch OFF e switch IN Fast switch OFF e NB switch OFF e PRE switch e SQL control Max CCW Set the si
79. istor 25 2 2 7010003320 Resistor ELR20J 220 Q 7010000990 Resistor R25J 470 7010003740 Resistor ELR20J 470 7010003580 Resistor ELR20J 22 7510000110 Thermistor ERT D2FGL251S 7010004130 Resistor 820 3300 7010003280 Resistor ELR20J 100 7010004450 Resistor R20J 100 7010004090 Resistor R20J 150 Q 7010004070 Resistor R20J 100 Q 7010003950 Resistor R20J 10 Q 7010003620 Resistor ELR20J 47 7010003660 Resistor ELR20J 100 7010001030 Resistor R25J 1000 7010003620 Resistor ELR20J 47 7010003660 Resistor ELR20J 100 7010003530 Resistor ELR20J 10 7010003510 Resistor ELR20J 6 8 7010004130 Resistor R20J 3300 7010003580 Resistor ELR20J 22 7010003400 Resistor ELR20J 1 7010004320 Resistor R20J 10 7010004320 Resistor R20J 10 7010004230 Resistor 820 2 2 7010004230 Resistor R20J 2 2 7010003460 Resistor ELR20J 3 3 7010004230 Resistor R20J 2 2 7010004070 Resistor R20J 1000 7010004230 Resistor 820 2 2 7010003440 Resistor ELR20J 2 2 7010004230 Resistor R20J 2 2 7010003440 Resistor ELR20J 2 2 7010001030 Resistor R25J 100 Q 7010004230 Resistor R20J 2 2 80 7010001110 Resistor 25 4700 7010004110 Resistor R20J 2200 7010003990 Resistor 820 220 7010003320 Resistor ELR20J 220 7010000870 Resistor 825 470 7010003440 Resistor ELR20J 22 7010003400 Resistor EL
80. lator circuit Dual gate FETs are used on the 1st and 2nd IF amplifiers Q15 Q21 027 The 2nd gates of Q15 Q21 and Q27 are controlled bias voltage rapid time constant is used for Q27 to prevent raising the edge distortion of receive signals R140 connected to the gate of Q28 improves the temperature characteristics of the receiver R138 adjusts the receiver gain IF CIRCUIT 2nd LO from 70 45 MHz 4 1 6 NOISE BLANKER CIRCUITS MAIN UNIT The 725 uses a noise trigger noise blanker circuit that cuts out pulse type noise signals at the noise blanker gate 05 08 portion of the signals from Fl2 is amplified at the noise amplifiers Q16 IC2 and detected at the noise detector 012 013 The detected voltage from the noise detector is applied to the noise blanker switch Q19 The threshold level of the noise blanker switch is set at 0 9 V When the detected voltage exceeds the threshold level Q20 outputs a blanking signal to activate the noise blanker gate 05 08 portion of the detected voltage is applied to noise circuit Q18 and fed back to the amplifier IC2 as noise voltages time constant of the noise AGC circuit is determined by R43 R47 and C60 This circuit does not operate to detect pulse type noise When the operating frequency or mode is changed the DNB signal line becomes LOW turning Q20 The noise
81. nge The 1st LO signal 70 9515 100 4515 MHZ enters the MAIN UNIT from the PLL UNIT via J5 The signal is amplified at O4 filtered by a low pass filter and then applied to the 1st mixer circuit Q13 Q14 The low pass filter employs a ring core inductor to prevent 1st LO leakage Signals The output level from 34 is approx 25 dBm The 1st IF signal is applied to an MCF Monolithic Crystal Filter 11 to suppress out of band signals The signal is amplified at the 1st IF amplifier Q15 and then applied to the 2nd mixer IC1 4 1 5 IF CIRCUITS MAIN UNIT The 1st IF signal from 015 is converted to 9 MHz 0 IF signal at the 2nd mixer is a DBM Double Balanced Mixer EXACTNESS 2ND IF FREQUENCY FREQUENCY MHz 9 0115 9 0106 9 0100 The 2nd LO signal 61 44 MHz from the PLL UNIT via J4 is applied to the 2nd mixer The converted 2nd IF signal passes through D4 D35 for transmitting and is applied to the MCF Fl2 to suppress unwanted signals The signal output from EI passes through the noise blanker gate 05 08 and is amplified at the 2nd IF am plifier Q21 The signal enters one of the three 9 MHz filters FI3 Fl4 optional CW narrow filter or optional FM UNIT D52 The filters are selected with mode selecting signals SSB CW AM CW N and the T8 voltage line The signal from a 9 MHz filter is amplified at the 2nd IF amplifiers 027 029 and applied to the demodu
82. nsistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Diode Diode Diode Diode Diode M5218L uPC1037HA uPC1037HA GD4066B uPC1241H M5218L M5218L GD4011B NJM7808A BA618 M54562P 2SC2053 35 74 3SK74 K 2SC2053 25 909 Q RN1202 2SK241 Y 2SK125 2SK125 RN2202 2SC2458 GR RN1202 2SK125 2SK125 3SK74 M 2SK192A Y 2SA1048 GR 2SC2458 GR 2SC2458 GR RN2202 3SK74 M 2SK241 Y RN1202 RN2202 RN2202 2SC2458 GR 3SK74 M 2SK241 Y 2SC2458 GR 2SC2458 GR 2SC2458 GR RN1202 RN1204 RN1202 2SC2458 GR 2SC2458 GR 2SC2458 GR 2SA1048 GR RN1204 2SC2458 GR RN2202 2SC2458 GR 2SC2458 GR 2SC2458 GR 2SD468C 2SD468C 2SD468C 2SC2458 GR 2SC2458 GR RN1202 2SD1225M R 2SA1048 GR RN1204 RN1204 2SC2458 GR 1SS53 1SS53 1SS53 1SS53 1SS53 MAIN UNIT MAIN UNIT 1710000160 Diode 1SS133 6180000820 Coil LAL O3NA 2R7M 1710000160 Diode 1SS133 6180000830 Coil LAL O3NA 3R3K 1710000160 Diode 1SS133 6180000900 Coil LAL 03NA 101K 1710000160 Diode 1SS133 6180000800 LAL 1710000160 Diode 1SS133 6180000780 Coil LAL 03NA 1R2M 1710000160 Diode 1SS133 6180000790 LAL 6 185 1710000160 Diode
83. on sidetone signal and transmit signal When the BK IN switch is pushed IN 8 V from Q38 charge C252 and Q26 is turned ON turning ON Q52 Q52 grounds the SEND line for transmitting DELAY control R244 adjusts the transmit release delay time The 8 V from Q38 charges C249 and D91 is turned OFF disconnecting C249 040 040 then oscillates a sidetone signal R268 prevents sidetone click noise The 8 V from Q38 is applied to a time constant and then to the balanced modulator IC6 to create a carrier signal R241 in the time constant adjusts a transmit delay timing for 12 msec ALC CIRCUIT 5V FOR voltage ALC MAIN UNIT voltage 2 006 Q53 IRF PWRJ POC line Raoa 3 r 0 5V control 5 8 55 amp PS E d 2 1 3 External Q56 P ALC REF R203 R206 R209 voltage voltage Va el 1 524 5 J SJ 3 AM8 e 012 8 V 041 28M 8 OPTIONAL AM I UNIT l Fig 5 1 1 4 5 While CW transmit IF signal exists 039 and Q23 turn the switching diode D35 OFF to ensure transmit isolation 4 2 9 OUTPUT POWER METER CIRCUITS MAIN UNIT The FOR voltage the is applied to the meter amplifier IC10 3 and then to the meter R189 and C261 are used for peak power measurement 4 2 10 TIR SWITCHING CIRCUIT MAIN UNIT When the PTT or TRANSMIT switch is set
84. or more AC milli voltmeter Measuring range 10 mV 10 V n ue External speaker Impedance 8Q 02 1 18 30 MHz External speaker Jmpedance 80 Measurement capability 1 A and 30 A RF power meter terminated type Impedance 500 SWR Less than 1 2 1 Audio generator Frequency range 300 3000 Hz Frequency counter Frequency range 0 1 100 MHz Output level 1 00 Frequency accuracy 1 better Attenuator Power attenuation 40 or 50 dB Sensitivity 100 mV or better Capacity 150 W or more RF voltmeter Frequency range 0 1 100 MHz Spectrum analyzer Frequency minimum At least 90 MHz Measuring range 0 01 10 V Spectrum bandwidth 100 kHz or more Oscilloscope Frequency range DC 20 MHz Measuring range 0 01 10 V Standard signal Frequency range 0 1 30 MHz generator SSG Output level 127 17 dBm 0 1 HV 32 Attenuator 40 or 50 dB Standard signal generator Spectrum analyzer RF power meter 200 50 to the antenna Connector CAUTION DO NOT connect the signal generator while transmitting AC to EXT SP to DC power socket AC power supply 13 8 V 30 A to MIC MIC connector Front panel view Pin 1 MIC Audio Pin 7 MIC GND generator lt ADJUSTMENT 6 2 PLL ADJUSTMENT POINT
85. ramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil Coil P C Board ORDER Trimmer 60 6 GRM40 330 7 GRM40 1042 67 611 40 SL 680J 66 40 SL 020C GRM40 SL 121 06 611 40 SL 0700 7 GRM40 SL 121 GRM40 SL 120 66 40 SL 680J 7 GRM40 1042 67 660 40 1042 7 66 40 1042 67 611140 1042 7 GRM40 2200 GRM40 102K 67 GRM40 102K 7 25 1971 2563133 2563133 2501406 25 2904 25 2904 25 562 RN1202 RN1202 RN2202 MV5 5 MV5 15CD11 191555 191555 1K60 1K60 191555 191555 151555 151555 151555 151555 151555 LR 142 BTO1RN1 A61 001 BTO1RN1 A61 001 LR 155 LR 83 LR 156 LR 146 LAL 04NA 8R2K LAL 04NA 4R7K BTO1RN1 A61 001 BTO1RN1 A61 001 LAL 100K BTO1RN1 A61 001 BTO1RN1 A61 001 BTO1RN1 A61 001 UNIT ORDER PA UNIT ORDER 6910000670 6180000900 6140001110 6140001120 6140001780 6140001790 6140001800 6140001800 6140001810 6140001820 6140001320 6140001330 6110001490 6110001500 6180000900 618
86. rom R87 Displayed frequency 14 10000 MHz Rear Connect the RF Pre set to max CCW MAIN Mode USB panel power meter to the PWR control CW antenna connector TRANSMIT GAIN OUTPUT 1 POWER Ic APC 1 Displayed frequency 14 10000 MHz Rear Connect the 22A MAIN R194 Mode CW panel ammeter between PWR control CW Supply e Connect wire between J6 and 725 3 and ground e Connect key to the KEY jack and keep the key down 1 Displayed frequency 14 10000 MHz Front Meter 100 scaie MAIN R186 Mode PWR control CW e Connect key to the KEY jack keep the key down CW DELAY 1 Displayed frequency 14 10000 MHz MAIN Connect the Adjust as follows MAIN R241 TIME oscilloscope to J11 and the electronic keyer Apply signal to the connector Level 1 mV 1 5 kHz 50 W Front Transmitting Maximum level MAIN L37 L17 116 114 17 control 50 W NOTE Adjust the MIC control to keep the output power at 50 W for each adjustment Displayed frequency 1 91000 MHz Rear Connect the RF Pre set to max CCW MAIN R194 Mode CW panel power meter to the R241 PWR control Max CW antenna connector e Connect a key
87. supply requirement e Current drain at 13 8 V DC e Dimensions e Weight TRANSMITTER e Output power e Spurious emissions e Carrier suppression e Unwanted sideband e Microphone impedance RECEIVER e Receive system e Intermediate frequencies e Sensitivity preamplifier ON e FM squelch sensitivity e Selectivity 9 Spurious response rejection e Audio output impedance Audio output power e RIT variable range Receive 800 kHz 30 MHz Transmit 160 m band 1 6 2 0 MHz 17 m band 18 068 18 168 MHz 80 m band 3 5 4 0 MHz 15 band 21 0 21 45 MHz 4 band 7 0 7 3 MHz 12 24 89 24 99 MHz 30 10 1 10 15 MHz 10 band 28 0 29 7 MHz 20 band 14 0 14 35 MHz SSB CW 1 0 7 FM UNIT is required for transmit FM transmit receive 26 50 unbalanced 10 C 60 14 140 F Less than 200 Hz up to hour after power is turned Less than 30 Hz after one hour at 25 77 F Less than 350 Hz at 0 C 50 32 F 122 F 13 8 V DC 15 negative ground Receive squelched 1 2 max audio output 1 5 Transmit 20 241 W x 94 x 239 D 9 5 W x 3 7 H x 9 4 D in 4 6 kg 10 1 Ib Projections not included SSB CW FM 10 100 W continuously adjustable AM 10 40 W continuously adjustable More than 50 dB below peak output power More than 40 dB below
88. to transmit IC13 pin 10 and IC13 pin 3 are LOW At this time Q49 turns ON and 0 V is present on the 8 voltage line Q50 turns OFF and there is 8 V present on the T8 voltage line When the PTT or TRANSMIT switch is set to receive IC13 pin 10 and IC13 pin 3 are HIGH At this time Q49 turns OFF and 8 V is present on the R8 voltage line Q50 turns ON and V present on the T8 voltage line When PLL data or the operating mode is changed the DNB signal line becomes LOW turning OFF the _ preventing unwanted transmission 4 3 PLL CIRCUITS 4 3 1 GENERAL DESCRIPTION The PLL UNIT generates a 1st LO signal 70 9515 100 4515 MHz variable and 2nd LO signal 61 44 MHz fixed used in the MAIN UNIT The IC 725 uses a dual loop PLL system main loop PLL uses 4 VCO circuits for all HF band coverage within 512 kHz steps A sub loop PLL uses a DDS Direct Digital Synthesizer system for 512 kHz coverage within 10 Hz steps The DDS system provides a rapid lockup time and high quality frequency oscillation 4 3 2 REFERENCE OSCILLATOR CIRCUIT PLL UNIT A 30 72 MHz reference frequency is produced by the oscillator Q33 and X2 The reference frequency buffer amplified at Q34 is divided by 2 at IC15 and is then applied to the PLL circuit as the PLL reference frequency The signal oscillated at Q33 is multiplied by 2 at Q36 resulting 61 44 MHz signal is filtered at th

Download Pdf Manuals

image

Related Search

Related Contents

平成26年度高病原性鳥インフルエンザ防疫対策の  User Manual LightinLED Super Nova  OWNER`S MANUAL MANUEL D`UTILISATEUR MANUAL  Uso e manutenzione  取扱説明書 PF-P470 / PF-P450  PDFファイル／3.58MB  Thomson TM9158 Radio cassette CD  Manual de instrucciones    Pelco DX8000 User's Manual  

Copyright © All rights reserved.
Failed to retrieve file