Icom IC-E2820 Service Manual Download

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S-14326XZ-C1
Apr. 2007

DUAL BAND FM TRANSCEVER

iC-e2820

Summary of Contents for IC-E2820

Page 1: ...S 14326XZ C1 Apr 2007 DUAL BAND FM TRANSCEVER iC e2820...

Page 2: ...136FNG IC E2820 MAIN UNIT 5 pieces 8820001210 Screw 2438 screw IC E2820 Top cover 10 pieces Addresses are provided on the inside back cover for your convenience Icom Icom Inc and logo are registered t...

Page 3: ...NCY SYNTHESIZER 4 6 4 4 POWER SUPPLY CIRCUITS 4 8 4 5 PORT ALLOCATIONS 4 9 SECTION 5 ADJUSTMENT PROCEDURES 5 1 PREPARATION 5 1 5 2 FREQUENCY ADJUSTMENT 5 2 5 3 TRANSMIT ADJUSTMENT 5 3 5 4 RECEIVE ADJU...

Page 4: ...E T T I M S N A R T n o i t a l u d o m y c n e u q e r f e c n a t c a e r e l b a i r a V m e t s y s n o i t a l u d o M W 5 5 1 0 5 r e w o p t u p t u O x o r p p a z H k 0 5 n o i t a i v e d y...

Page 5: ...erence frequency oscillator Right band VHF PA module IC3 S AV32 UHF PA module IC2 S AU82L CPU IC25 HD64F2506RFC26DV EEPROM IC22 24LC512 DTMF decoder IC56 BU8872FS AF power amplifier IC38 LA4445 D A co...

Page 6: ...UNIT 2 Removing the bottom cover q Unscrew 7 screws then remove the bottom cover 10 screws Top cover w Disconnect the speaker cable Speaker cable Bottom cover 7 screws w Disconnect the cooling fan ca...

Page 7: ...applied to the 1st mixer IC19 375 550 MHz The received signals from the antenna connector J1 are passed through the LPF L101 104 108 C342 346 and HPF L77 80 C296 297 303 308 then applied to the RF amp...

Page 8: ...outputs L_AF_MUTE signal from pin 82 to the speaker mute switch Q102 according to the L_SQL signal level Thus the AF line is connected to the GND to turn the AF output OFF CTCSS DTCS CTCSS DTCS signa...

Page 9: ...4 16 and RX switch D7 810 1000 MHz The received signals from the ANT 1 J1 are passed through the HPF L102 105 107 110 C337 339 340 343 347 349 and RX switch D22 then applied to the RF amplifier Q23 Th...

Page 10: ...causes the drop of the gate voltage of IC3 Thus the TX power maintained to keep stable level TX muting is carried out by TX mute SW Q36 controlled by TX_mute signal Applying TX_mute signal to the bas...

Page 11: ...amplifier for both of V UHF bands The TX power setting voltage PCON_U from the D A converter IC1 pin 6 is applied to the pin 3 as a reference IC4 is rolled as a differential amplifier which outputs vo...

Page 12: ...O signals for right band RX 118 174 MHz and 810 1000 MHz The VCO output signal is amplified by buffer Q74 and applied to the LO amplifier IC45 via VCO switch D160 and applied to the LO filters accordi...

Page 13: ...ange to compensate for the drift in the VCO oscillating frequency RIGHT BAND RX VCO LOOP A portion of VCO output signals from the buffer Q74 are applied to the PLL IC IC14 via the VCO switch D160 and...

Page 14: ...IC24 D119 Q83 Q84 D120 IC55 5VS REG REG 5VS 5V 5V REG D164 Q82 VCC REG DTMF decoder IC56 Electric volume IC33 AF mixer IC59 etc Limitter D165 D168 etc AF filter Q47 Q50 MIC amplifier IC28 APC controll...

Page 15: ...time control signal to the loop filter left band H Fast lock up time O PIN No PORT NAME DESCRIPTION I O 38 R_UVCO_SEL VCO power control signal to the VCO select switch Right band UHF Q65 68 L Right b...

Page 16: ...O 128 RX232 Data bus for RS 232C communication I 129 DA_CK Serial clock signal to the D A converter O 130 DA_DATA Serial data to the D A converter O 134 DA_STB Strobe signal to the D A converter O 13...

Page 17: ...enuation 40 dB Capacity More than 100 W 5 1 PREPARATION ENTERING ADJUSTMENT MODE q Connect the JIG cable to the MICROPHONE CONNECTOR see the illust above w Push and hold the both of MAIN BAND keys the...

Page 18: ...to the antenna connector J1 Transmitting Rotate the right band s DIAL to adjust the reference frequency then push the right band s MAIN BAND key 146 000 MHz Right Band R REF 2 435 000 MHz IC E2820 CO...

Page 19: ...and Low L PLL 5 5 W Band High L PLH 6 430 MHz BAND TRANSMIT OUTPUT POWER HI POWER Band Low R PHL 1 Connect an RF Power Meter to the antenna connector J1 Transmitting Rotate the right band s DIAL to ad...

Page 20: ...ust the wave form then push the right band s MAIN BAND key during transmit Square Wave form FM N L FMB 2 Band Center FM L FMB 3 FM N L FMB 4 Band High FM L FMB 5 FM N L FMB 6 144 MHz BAND DTCS MODULAT...

Page 21: ...ulation Analyzer to the antenna connector J1 through an attenuator No audio signals are applied to the JIG cable See the page 5 1 Transmitting Rotate the right band s DIAL to adjust the deviation then...

Page 22: ...Hz Right Band R MT2 10 173 980 MHz Left Band L HT2 11 Set the SSG as Frequency 173 980 MHz Right Band R HT2 12 174 020 MHz Left Band L LT3 13 Set the SSG as Frequency 174 020 MHz 220 020 MHz Left Band...

Page 23: ...3 Set the SSG as Frequency 400 020 MHz Right Band R LT6 24 440 020 MHz Left Band L MT6 25 Set the SSG as Frequency 440 020 MHz Right Band R MT6 26 449 980 MHz Left Band L HT6 27 Set the SSG as Frequen...

Page 24: ...s Level 15 dB 300 020 MHz S3 level Left Band L S34 11 Set the SSG as Frequency 300 020 MHz Level 1 dB Full scale Left Band L SF4 12 Set the SSG as Level 15 dB 387 020 MHz S3 level Left Band L S35 13 S...

Page 25: ...4 146 020 MHz FM L SQ2 5 FM R SQ2 6 FM N L SQ2 7 FM N R SQ2 8 220 020 MHz FM L SQ3 9 FM N L SQ3 10 300 020 MHz FM L SQ4 11 FM N L SQ4 12 387 020 MHz FM L SQ5 13 FM R SQ5 14 FM N L SQ5 15 FM N R SQ5 1...

Page 26: ...FM N R SQ7 24 910 020 MHz FM R SQ8 25 FM N R SQ8 26 ADJUSTMENT ITEM ADJUSTMENT CONDITIONS OPERATION VALUE DIVERSITY Connect a Standard Signal Generator to each antenna connector J1 and J2 independent...

Page 27: ...evel Left Band L DM5 3 Set the SSG as Level 1 dB Right Band R DM5 4 Full scale Left Band L DH5 5 Set the SSG as Level 15 dB Right Band R DH5 6 435 020 MHz S0 level Left Band L DL6 1 Set the SSG as Fre...

Page 28: ...YJ 681 V 680 B 91 9 44 9 S Surface mount CONTROL UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION R155 7030003420 S RES ERJ3GEYJ 681 V 680 B 88 44 9 R156 7030005050 S RES ERJ2GEJ 103 X 10 k B 105 5 45...

Page 29: ...805F TE16L Q B 107 1 136 IC22 1140012950 S IC 24LC512T I SM B 112 6 98 2 IC23 1110005991 S IC S 80945CNMC G9F T2G T 121 74 5 IC24 1180001251 S IC TA7808F TE16L Q B 100 1 136 IC25 1140014550 S IC HD64F...

Page 30: ...D36 1790001260 S DIO MA2S077 TX T 53 6 96 8 D37 1790001260 S DIO MA2S077 TX T 60 96 8 D38 1790001260 S DIO MA2S077 TX T 67 3 96 8 S Surface mount MAIN UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION...

Page 31: ...LOCATION L79 6200003960 S COL MLF1608A 1R0K T T 102 4 127 3 L80 6200010160 S COL AS080440 22N B 38 9 150 6 L81 6200011670 S COL LQW18AN82NG00D T 84 2 116 9 L82 6200012900 S COL 0 30 2 0 7TL 57 2N T 97...

Page 32: ...30004990 S RES ERJ2GEJ 221 X 220 B 87 3 86 9 S Surface mount MAIN UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION R141 7030008400 S RES ERJ2GEJ 182 X 1 8 k B 86 4 86 9 R142 7030007280 S RES ERJ2GEJ 33...

Page 33: ...S ERJ2GEJ 331 X 330 T 41 6 49 3 R358 7030005170 S RES ERJ2GEJ 474 X 470 k B 6 38 R359 7030005220 S RES ERJ2GEJ 223 X 22 k B 7 9 36 8 R360 7030005050 S RES ERJ2GEJ 103 X 10 k B 40 36 6 S Surface mount...

Page 34: ...4 4 R623 7030007340 S RES ERJ2GEJ 153 X 15 k B 118 5 99 4 R624 7030004980 S RES ERJ2GEJ 101 X 100 B 70 2 14 7 S Surface mount MAIN UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION R625 7030005240 S RES...

Page 35: ...50 S RES ERJ2GEJ 103 X 10 k B 100 6 97 7 R875 7030005120 S RES ERJ2GEJ 102 X 1 k T 46 1 126 9 R876 7030005090 S RES ERJ2GEJ 104 X 100 k T 49 6 118 5 R877 7030010040 S RES ERJ2GEJ JPW T 37 138 3 R878 7...

Page 36: ...39 C213 4030017460 S CER ECJ0EB1E102K T 56 104 8 C214 4030011060 S CER GRM31M2C2H4R0CY21L B 40 5 121 6 S Surface mount MAIN UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION C215 4030017460 S CER ECJ0EB...

Page 37: ...J0EB1A104K T 55 3 65 1 C433 4030017040 S CER ECJ0EB1A333K B 56 3 70 2 C434 4030017420 S CER ECJ0EC1H470J T 32 6 49 1 C435 4030017680 S CER ECJ0EC1H820J B 55 8 68 4 C436 4550006050 S TAN TEESVA 0J 106M...

Page 38: ...EEE1CA100SR B 61 9 7 5 C664 4030017730 S CER ECJ0EB1E471K B 116 32 7 C665 4510008500 S ELE EEE1CA101WP T 125 7 43 C666 4030016970 S CER ECJ0EB1C223K T 106 107 2 C667 4510008540 S ELE EEE1CA100SR T 106...

Page 39: ...S CER ECJ0EB1E102K T 114 6 51 8 C910 4030016790 S CER ECJ0EB1C103K T 114 6 50 9 C911 4030016930 S CER ECJ0EB1A104K T 111 7 53 7 C912 4030016930 S CER ECJ0EB1A104K B 59 9 28 2 C913 4030017460 S CER ECJ...

Page 40: ...B 117 2 35 1 EP61 6910018460 S BEA MMZ1005Y102C T B 119 3 34 3 EP62 6910018460 S BEA MMZ1005Y102C T B 119 3 33 4 EP63 6910018460 S BEA MMZ1005Y102C T B 119 3 32 5 EP64 6910018460 S BEA MMZ1005Y102C T...

Page 41: ...SHEET 1 MP23 8930006440 Push spring F 2 MP25 8830003020 Bit insert SB 264540 CD 2 MP26 8610007510 Knob spring NO 7800 2 MP27 8610007420 Knob spring NO 6601 2 MP28 8830001010 HEX NUT A 2 MP29 881000922...

Page 42: ...breviations C CHASSIS PARTS CON CONTROL UNIT M MAIN UNIT U UT 123 Optional product VR1 UNIT VR2 UNIT CONTROL UNIT VR1 VR1 S15 CON S16 CON MP3 CON MP7 CON MP8 CON MP10 CON MP9 CON MP9 CON MP9 CON MP4 C...

Page 43: ...L 7 2 L L30 L31 L32 3 3 L 4 3 L 8 3 L L39 L40 L41 L42 3 4 L 4 4 L 5 4 L L47 L48 L49 1 5 L L52 3 5 L 4 5 L L55 L57 L58 L59 L60 3 6 L 4 6 L 5 6 L L66 L67 L68 9 6 L L71 L72 L74 L75 L76 L78 9 7 L 1 8 L L...

Page 44: ...C 5 0 7 C C707 C708 C709 C711 C714 C718 C723 C725 6 2 7 C C728 C731 2 3 7 C C733 C736 C737 C738 0 4 7 C C741 2 4 7 C C743 4 4 7 C C746 C747 C748 9 4 7 C C750 1 5 7 C C752 C836 C863 C864 C865 C867 C874...

Page 45: ...UNIT 1 D _ N E E R G HV 5V KEY 2SC4738 RDATA AND RSQL VR1 UNIT LVOL RVOL LSQL LVOL LSQL VR2 UNIT RSQL RVOL W1 4 3 2 5 1 W1 4 3 2 5 1 to CONTROL UNIT J3 MAX3221IPWR RS 232C TX232 RX232 IC46 CPU5V M3062...

Page 46: ...Q15 2SA1362 D59 L709CE D42 MA742 8V LIMITER D52 MA742 TX_MUTE LIMITER HV D77 MA2S077 D47 MA742 Q17 2SA1362 Q22 REG 2SC3357 D39 MA742 VTX_C D25 S AV32 D62 L709CE 2SC4703 Q25 D75 L709CE MA2S111 Q12 UNR...

Page 47: ...OUT 3 4 P91 TB1IN SIN 3 5 P90 TB0IN CLK3 6 BYTE 7 CNVSS 8 P 87 XCIN 9 P86 XCOUT 10 RESET 11 XOUT 12 VSS 13 XIN 14 VCC 15 P85 NMI 16 P84 INT2 17 P83 INT1 18 P82 INT0 19 P81 TA4IN U 20 P80 TA4OUT U 21 P...

Page 48: ...33K R644 10K MMZ1005Y102CT EP32 C599 4P D140 DA221 R533 68K R632 39K Q83 2SA1588 0 1 C906 5VS 470P C675 52465 1071 J24 12 34 56 78 91 0 R475 22K VAFO R547 22K MAX3221IPWR IC46 1 EN 2 C1 3 V 4 C1 5 C2...

Page 49: ...6 Q66 47 R440 0 001 C390 UHFYGR R316 15K 470P C459 0 R302 0 001 C461 0 01 C561 C426 0 1 C386 0 01 47P C443 0 022 C357 22K R359 L_2ndLo 0 001 C896 0 1 C927 R400_R5 L_VCO8 330 R399 R_DTCS_I 8V UNR9210J...

Page 50: ...2 330 0 001 C47 0 001 C221 0 001 C61 R244 4 7K 5P C281 0 001 C259 100K R156 L300_R5 100K R27 3P C239 15N L10 100K R30 R29 470 47K R173 Q34 2SC5624 C251 0 001 12 1N L95 IC4 NJM3404AV 1 2 3 4 5 6 7 8 47...

Page 51: ...GND 3 GND 4 OUT 5 GND 6 VCC MB15A02PFV1 IC41 1 OSCIN 2 OSCOUT 3 VP 4 VCC 5 DO 6 GND 7 LD 8 FIN 9 CLOCK 10 DATA 11 LE 12 FC 13 NC 14 FOUT 15 P 16 B L_2ndLo C781 0 0 0 1 C795 27P Q113 2SC5231 C815 0 0 0...

Page 52: ...7 56P C398 8V 0 001 C490 0 001 C516 330 R369 R325 2 2M C573 0 001 1 2K R365 0 001 C526 0 1 C413 C534 27P D104 MA2S077 D101 MA2S077 C430 3P 0 001 C502 2SC4116 Q62 3P C387 0 001 C840 10K R336 Q73 2SC523...

Page 53: ...00 S RES ERJ3GEYJ 471 V 470 B 51 5 3 3 R15 7030003480 S RES ERJ3GEYJ 222 V 2 2 k B 51 5 3 3 R16 7030003560 S RES ERJ3GEYJ 103 V 10 k B 45 7 4 2 R18 7030003560 S RES ERJ3GEYJ 103 V 10 k B 41 6 33 6 R19...

Page 54: ...0EB1A104K B 38 2 1 5 C206 4030017030 S CER ECJ0EB1A273K B 39 1 1 5 C207 4030017030 S CER ECJ0EB1A273K B 40 1 5 C208 4030016930 S CER ECJ0EB1A104K B 33 1 2 1 C209 4030017400 S CER ECJ0EC1H220J B 40 1 1...

Page 55: ...2 C C214 6 1 2 C 0 0 3 C C301 2 0 3 C C303 C304 0 1 3 C C350 C351 5 5 3 C C366 C367 8 6 3 C C369 2 7 3 C 4 7 3 C C375 C376 7 7 3 C C378 0 0 1 D D102 1 P E 0 0 1 P E 0 0 2 P E 1 0 2 P E EP202 3 0 2 P E...

Page 56: ...lenwood Centre 150 6165 Highway 17 Delta B C V4K 5B8 Canada Phone 1 604 952 4266 Fax 1 604 952 0090 URL http www icomcanada com E mail info icomcanada com Unit 1 103 Garden Road Clayton VIC 3168 Austr...

Page 57: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14326XZ C1 2007 Icom Inc...

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