Icom IC-775 Service Manual Download

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Summary of Contents for IC-775

Page 1: ...o ICOM SERVICE MANUAL Icbm Inc ...

Page 2: ...used batteries according to the manufacturer s instructions Explosionsqefahr bei unsachgemaBen Austaush der Batterie Ersatz nur durch denselben oder einen vom Hersteller empfohlenen ahniichen Typ Entsorgung gebrauchter Batterein mach Angaben des Herstellers ORDERING PARTS REPAIR NOTES Be sure to include the following four points when ordering 1 replacement parts 2 1 1 0 diglt order numbers 2 Compo...

Page 3: ...NT PROCEDURES 5 1 to 14 5 1 PREPARATION BEFORE SERVICING 5 1 5 2 PLL ADJUSTMENT 5 2 5 3 RECEIVER ADJUSTMENT 5 4 5 4 TRANSMITTER ADJUSTMENT 5 8 5 5 TUNER UNIT ADJUSTMENT 5 14 SECTION 6 PARTS LIST 6 1 to 35 SECTION 7 MECHANICAL PARTS 7 1 to 7 SECTION 8 SEMI CONDUCTOR INFORMATION 8 1 SECTION 9 BOARD LAYOUTS 9 1 to 13 9 1 DSP UNIT IC 775DSP only 9 1 9 2 SW A UNIT 9 2 9 3 SW B AND DISPLAY UNITS 9 4 9 4...

Page 4: ...usly adjustable Spurious emissions Less than 60 dB Carrier suppression More than 40 dB Unwanted sideband More than 55 dB Microphone 600 Q impedance RECEIVER Receive system SSB CW RTTY Quadruple conversion AM superheterodyne FM Triple conversion superheterodyne Intermediate frequencies Unit MHz MODE SSB CW RTTY AM FM 1st 69 0100 2nd 9 0115 9 0106 9 0100 3rd 0 455 0 455 0 455 0 455 4th 10 6950 10 69...

Page 5: ...e 8 screws from the bottom cover then remove the TUNER unit the bottom cover D Remove 2 screws e and 1 screw f to remove the PA REG UNIT TUNER UNIT Remove 2 screws U to remove the speaker Remove 2 screws B 2 screws and 2 screws B Push the position A and pull the position B to release 2 hooks Disconnect 2 connectors from the REG unit s front and 1 connector cable from the REG unit from the front bl...

Page 6: ...as standard Install the DSP unit as follows Remove the top cover as described on p 2 1 Connect the 3 plugs attached to the backside of the front panel to the appropriate connectors as shown below m D Insert the DSP unit into the slots at the backside of the main and sub dials 0 Tighten the 2 supplied screws as shown below D Replace the top cover I After installation read the instruction manual as ...

Page 7: ...uld be installed FILTER SELECTION After the filter s are installed activate the optional m filter s in H set mode If this is not correctly set the installed filter s cannot be selected I Remove the top and bottom covers as described on p 2 1 Insert the filter s to the proper position The locations are shown in the figures below The FL 53A and FL 222 must be installed in the proper direction The FL...

Page 8: ...he PLL unit where the CR 282 will be installed D Install the CR 282 in the PLL unit paying attention to orientation Symbols on the bottom of the CR 282 must be identically matched with symbols on the P C board D Bend the leads of the CR 282 at the foil side of the P C board and soider them as shown in figure 2 at right Trim the ieads even with the soider points D Replace the PLL unit ribbon cabie ...

Page 9: ... breaking capacity fuse for 220 240 V versions BACKUP BATTERY REPLACEMENT The transceiver has a lithium backup battery on the inside of the front panel MAIN unit for retaining operating conditions The usual life of the backup battery is approxi mately 5 years When the backup battery is exhausted the transceiver transmits and receives normally but cannot retain oper ating conditions except for memo...

Page 10: ...SECTION 3 INSIDE VIEWS BOTTOM VIEW 3 1 ...

Page 11: ...r TOP VIEW 3 2 CTRL unit ...

Page 12: ...9 1 2 8 1 1 MHz KM 1 6 2 MHz B3 11 15 MHz 027 1 2 2 3 MHz B4 15 22 MHz 3 4 MHz B5 023 1 2 22 30 MHz 4 6 MHz B6 025 1 2 4 1 3 PREAMPLIFIER CIRCUITS RF UNIT 1 6 MHz and above The IC 775 DSP has 2 gain levels of preamplifier circuits One has 10 dB gain over a wideband frequency range and the other has 1 6 dB gain for 21 28 MHz Jbands When the PREAMP ATT switch is set to PRE1 or PRE2 the signals above...

Page 13: ...9 0106 MHz AM FM 9 0100 MHz 4 1 7 NOISE BLANKER CIRCUIT IF UNIT The noise blanker circuit detects pulse type noise and turns OFF the signal line when noise appears The 2nd IF signals from FI1 are applied to the noise blanker gate D68 D71 A portion of the signals from FI1 are amplified at the noise amplifiers Q47 Q49 then detected at the noise detector D75 to convert the noise components to DC volt...

Page 14: ...obtain the same attenuation characteristics within the IF band width The 4th IF frequency can be adjusted with the NOTCH control When the NOTCH switch is turned OFF the 4th IF signals pass through XI out of the notch filtering frequency There fore the IF notch circuit is substantially bypassed by the 4th IF signals 4 1 13 AGC CIRCUIT IF UNIT The AGC Automatic Gain Control circuit reduces IF ampli ...

Page 15: ...to the FM IF 1C IC15 pin 5 where the IF signals are converted into AF signals X2 is used for quadrature detector The detected AF signals are then applied to the AF selector switch IC16 IC17 via Q30 and Q31 4 1 19 AF SELECTOR SWITCH IF UNIT The AF signal from one of the detector circuits is applied to the AF selector switch IC16 IC17 IC16 and IC17 consist of 8 analog switches which are selected wit...

Page 16: ...amplified at VCA 1C IC8 The amplified signals from pin 4 are applied to the MIC TONE control VR A unit R43 and then to the VCA section of IC8 pin 7 The microphone gain setting from the main CPU pins 32 41 is converted to DC voltage at R38 R57 and applied to the VCA control terminal ICS pin 8 via IC20b The resulting signals from pin 9 are then applied to IClOa IF unit via the MIG2 signal line Exter...

Page 17: ... IF amplifiers IF unit 045 RF unit 016 are controlled by ALC bias voltage from the ALC circuit R23 adjusts the total transmitter gain 4 2 7 RF CIRCUIT RF AND PA UNITS The RF circuit amplifies the displayed frequency signal to obtain 200 W of RF output power The signals from the balanced mixer 017 018 is ampli fied at 01 9 and then pass through one of 9 bandpass filters Refer to p 4 1 for used RF f...

Page 18: ...mperature drops to 40 C 104 F or below While transmitting RF SWR ALC COMP Id or Vd meter readings are available and can be selected with the METER switch 1 Power meter circuit The FOR voltage from the CTRL unit is applied to the power meter amplifier IC2b pin 5 The POM signal from IC2b pin 7 is applied to the meter switch IC6 pin 15 R456 and C21 0 are used for peak hold 2 SWR meter circuit The FOR...

Page 19: ...tage at the loop filter R46 R47 C399 and then fed back to the varactor diode D2 in the VCO circuit 2 MAIN LOOP PLL The oscillated signal at one of the main loop VCOs 01 1 013 015 017 is amplified at the buffer amplifiers 019 022 and is then applied to the PLL 1C IC2 pin 14 The signal is then divided and detected on phase with the reference loop output frequency The detected signal output from IC2 ...

Page 20: ...l 300 900 Hz passes through the low pass filter and is then applied to the IF unit via the STON signal tine While transmitting in FM mode with the subaudible tone function the subaudible tone signal 67 0 254 1 Hz passes through the low pass filter and is then applied to the IF unit via the STON signal line 4 3 5 MARKER CIRCUITS MARKER BOARD The 30 MHz reference signal is divided by 3 at IC1 and th...

Page 21: ... Motor control signals Description MF1 TUNER PW PX PY PZ MF1 rotates Cl RELAY MF2 TUNER RW RX RY RZ MF2 rotates C2 RELAY 3 Tuning relays CTRL and RELAY units According to the operating band and antenna condition tuning relays select the condensers and coils Tuning relays Relay control signals Buffer Description RL5 RL10 CTRL PI 0 PI 2 PI 4 PI 6 IC9 Condenser selection RL1 RL6 RELAY 3 5M 7M 10M 14M...

Page 22: ...tuner 19 CK P30 Outputs a clock signal for the I O expanders optional UT 66 etc 21 DATA P32 Outputs serial data for the I O expanders optional UT 66 etc 55 DUT P73 Input port for the DSP unit installation 60 POE P80 Outputs an enable signal for the PLL strobe expander 1C IC13 61 PST1 P81 Outputs a strobe signal for the PLL strobe expander 1C IC13 62 PST2 P82 Outputs a strobe signal for the expande...

Page 23: ...PBT PB6 control 97 NRAD Input port for the NR LEVEL PB7 control 98 BLAD Input port for the BALANCE PCO control 99 PWAD Input port for the PWR PCI control 100 READ PC2 Input port for the RF control 4 5 4 I O EXPANDER PORT ALLOCATIONS 1 Output ports MAIN unit IC4 Pin number Port name Description 4 voxs Outputs a control signal for the Q1 VOX circuit 5 MINH Outputs an Inhibit signal for the Q2 microp...

Page 24: ...e signal is amplified at the limiter amplifier IC4a passes through the active low pass filters IC5a IC5b and is then applied to the switched capacitor filters IC6 IC7 The cut off frequencies of IC6 and IC7 can be programmed The resulting signal passes through IClOb and IC3 pins 3 4 and is applied to the AF selector IC16 in the IF unit 4 6 2 DSP TRANSMITTING DSP UNIT IC 775DSP only When transmittin...

Page 25: ...V Attenuator Power attenuation Capacity 50 or 60 dB 150 W or more RF voltmeter Frequency range Measuring range 0 1 100 MHz 0 01 10 V Spectrum analyzer Frequency range Spectrum bandwidth At least 90 MHz 100 kHz or more Digital multimeter Input impedance 1 0 MQ DC or better Standard signal generator SSG Frequency range Output level 0 1 100 MHz 0 1 pV 32mV 127 to 17 dBm FM deviation meter Frequency r...

Page 26: ...ency 7 99999 MHz Receiving PLL Connect a digital multi meter or oscilloscope to J12 6 5 V PLL C86 2 Displayed frequency 14 99999 MHz 6 5 V C96 3 Displayed frequency 21 99999 MHz 6 5 V Cl 07 4 Displayed frequency 29 99999 MHz 6 5 V C117 PLL B REFERENCE LOOP LOCK VOLTAGE 1 SPLIT ON Main frequency readout 7 999999 MHz Mode USB Receiving PLL Connect a digital multi meter or oscilloscope to R141 3 2 V ...

Page 27: ...y adjustment L4 L6 L7 P3 Reference frequency check point R46 PLL A reference loop lock voltage check point C47 PLL A reference loop lock voltage adjustment J14 PLL B main loop lock voltage check point C239 C229 C218 PLL B main loop lock voltage adjustment C205J C169 PLL B reference loop lock voltage adjustment R141 PLL B reference loop lock voltage check point 5 3 ...

Page 28: ...100000 MHz 0 pV 87 dBm M 1 kHz b7 5 kHz Front panel S RF meter Maximum level RF Adjust repeatedly L41 L51 L56 L55 L54 2 AGC OFF ON AGC deactivates Set the standard signal generator as Level 3 2 pV 97 dBm Rear panel Connect a distortion meter to EXT SP jack Minimum distortion level L51 L56 L55 L54 3 Displayed frequency 1 00 kHz AGC OFF OFF AGC activates Mode USB Apply no signal to the antenna conne...

Page 29: ......

Page 30: ...ront panel S RF meter Minimum level Front panel NOTCH control 2 Minimum level 45 dB or more from Notch OFF IF Cl 25 R193 NOISE BLANKER 1 Same setting as AGC VOLTAGE NB WIDE OFF PREAMP ATTj OFF Connect a standard signal generator to ANTI and set as Frequency 14 101500 MHz Level 1 0 pV 87 dBm Add the following signal into the signal generator output HH 1 msec IF Connect an oscilloscope to CP2 Maximu...

Page 31: ...adjustment 5 ...

Page 32: ...nd with a 50 O resistor Connect an RF voltmeter to J8 Maximum output RF Adjust in sequence L57 L161 L60 L58 MIXER BALANCE 1 Displayed frequency 24 900000 MHz and 14 100000 MHz Mode FM ANT 1 Transmitting Rear panel Connect a spectrum analyzer to ANTI via an attenuator Minimum adja cent spurious level on the both frequencies RF R80 TRANSMIT TOTAL GAIN 1 Displayed frequency 14 100000 MHz Mode USB MIC...

Page 33: ... 0 o1 n ft V r 0 1 LI i ly R362 1 Output power R364J adjustment L18 Transmit total gain adjustment adjustment fR21 3 I Rio O cm oo 1lU for drive amp adjustment W5 Idling current check point Jumper wire between black cables ...

Page 34: ...nerator to MIC connector and set as Level 3 mV Front panel S RF meter COMP scale Pointer Just swings Front panel MIC gain control MIC 2 Set the audio generator as Level 30 mV 20 dB IF R458 ALC METER 1 Mode USB METER ALC MIC control Center Connect an audio generator to MIC connector and set as Level 30 mV Transmitting Front panel S RF meter ALC scale Maximum position in the ALC zone IF R379 IdAPG 1...

Page 35: ...F UNIT R345 SWR meter adjustment R147 RTTY transmit gain adjustment L22 FM oscillator adjustment R457 Po meter adjustment R320 IdAPC adjustment R327 Vo meter adjustment R458 Comp meter adjustment PA UNIT ...

Page 36: ...kHz IF R292 2 Set the audio generator as Level 3 mV 3 5 kHz IF R281 3 Repeat steps 1 and 2 several times RESIDUAL AM 1 Mode FM MIC control Maximum PWR control Maximum ANT 1 Connect an audio generator to MIC connector and set as Frequency 1 kHz Level 30 mV Transmitting Rear panel Connect an RF pow er meter to ANTI Maximum level IF L7 L39 NOTE After this adjustment adjust again R23 see TRANSMIT TOTA...

Page 37: ... IF UNIT Residual AM adjustment FM deviation adjustment R297 FM carrier level adjustment R294 AM modulation adjustment CP4 FM carrier level check point 5 13 ...

Page 38: ... Transmitting CTRL Connect a digital multi meter or oscilloscope to CP1 Minimum voltage CTRL C134 2 Turn power OFF then turn power ON again while pushing NB ENT and TUNER Front panel Function display PUSH is displayed Verify 3 Push TUNER while indicating PUSH to memorize the reference voltage END is displayed after automatic trans mission Verify NOTE After tuner adjustment reset SW1 to USE then re...

Page 39: ...0270 S DIODE 1SS301 TE85R D4 1750000270 S DIODE 1SS301 TE85R D6 1750000270 S DIODE 1SS301 TE85R D8 1750000270 S DIODE 1SS301 TE85R DIO 1750000270 S DIODE 1SS301 fTE85R D12 1750000270 S DIODE 1SS301 TE85R D13 1750000290 S DIODE 1SS300 TE85R D14 1750000290 S DIODE 1SS300 TE85R D15 1750000290 S DIODE 1SS300 TE85R D16 1750000290 S DIODE 1SS300 TE85R D17 1750000290 S DIODE 1SS300 TE85R D18 1750000290 S...

Page 40: ...3440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R107 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R108 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R109 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R110 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R111 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R112 7030003470 S RESISTOR ERJ3GEYJ 182 V 1 8 kQ R113 7030003420 S RESISTOR ERJ3GEYJ 681 V 680 Q SW A UNIT REF NO ORDER NO DESCRI...

Page 41: ...380 S RESISTOR ERJ3GEYJ331 V 330 Q R3 7030003400 S RESISTOR ERJ3GEYJ471 V 470 Q R4 7030003430 S RESISTOR ERJ3GEYJ821 V 820 Q R5 7030003460 S RESISTOR ERJ3GEYJ 152 V 1 5 kD R6 7030003510 S RESISTOR ERJ3GEYJ 392 V 3 9 kQ R7 7030003470 S RESISTOR ERJ3GEYJ 182 V 1 8 kQ R8 7030003380 S RESISTOR ERJ3GEYJ 331 V 330 Q R9 7030003400 S RESISTOR ERJ3GEYJ 471 V 470 Q RIO 7030003430 S RESISTOR ERJ3GEYJ 821 V 8...

Page 42: ...C Cl 808 JB 1H472K T A C4 4030006880 S CERAMIC C1608 JB 1H 472K T A C5 4030006880 S CERAMIC Cl 608 JB 1H472K T A J1 6450001530 CONNECTOR HU581 5 01 4030 J2 6450001540 CONNECTOR HU5315 01 4020 J3 6510017650 CONNECTOR 52045 1045 EP1 0910043652 PCB B 4298B REF NO ORDER NO DESCRIPTION R1 7210002550 VARIABLE RV 295 RK0972210 10KB 10KB J1 6510017790 CONNECTOR 52045 0645 EP1 0910043491 PCB B 4294A VR C U...

Page 43: ... 1 H 332K T A C46 4030008650 S CERAMIC C1808 JB 1 H 332K T A C47 4510004630 S ELECTROLITIC ECEV1CA100SR C48 4510004630 S ELECTROLITIC ECEV1CA100SR C49 4510004630 S ELECTROLITIC ECEV1CA100SR C50 4030010070 S CERAMIC C1608 X7S 1C 104K T A C51 4510004630 S ELECTROLITIC ECEV1CA100SR CS2 4510004630 S ELECTROLITIC ECEV1CA100SR C53 4030010070 S CERAMIC C1808 X7S 1C 104K T A CS4 4510004830 S ELECTROLITIC ...

Page 44: ...R 09 1750000270 S DIODE 1SS301 TE85R 013 1750000270 S DIODE 1SS301 TE85R 014 1730000930 S ZENER RD13M T2B1 015 1790001130 S DIODE D2FS4 4063 016 1750000270 S DIODE 1SS301 TE85R 017 1750000270 S DIODE 1SS301 TE85R 018 1750000270 S DIODE 1SS301 TE85R 019 1750000270 S DIODE 1SS3Q1 TE85R 020 1750000270 S DIODE 1SS301 TE85R XI 6050008160 S XTAL CR 410 9 8304MHz LI 6170000140 COIL LW 15 L4 6180000990 CO...

Page 45: ...79 7030003620 S RESISTOR ERJ3GEYJ 333 V 33 kQ R81 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R82 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R83 7030003440 S RESISTOR ERJ3GEYJ102V 1 kQ R84 7030003440 S RESISTOR ERJ3GEYJ102V 1 kQ R8S 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kQ R86 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R87 7030003640 S RESISTOR ERJ3GEYJ473V 47 kQ R88 7030003620 S RESISTOR ERJ3GEYJ 3...

Page 46: ...100 kQ C4 4310000360 MYUR 50F2D103J R212 7030005870 S RESISTOR RR0816R 104 D 100 kQ C5 4510004630 S ELECTROLITIC ECEVICAIOOSR R213 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ ce 4310000610 MYUR 50 F2D 472J R214 7030003840 S RESISTOR ERJ3GEYJ 473 V 47 kQ C7 4510004630 S ELECTROLITIC ECEVICAIOOSR R215 7030003320 S RESISTOR ERJ3GEYJ 101 V 100 Q CO 4030010070 S CERAMIC C1608 X7S 1C 104K T A R216 7030003...

Page 47: ...W 473K C141 4010005060 CERAMIC DE0707 SL 330J 3KV C142 4030006880 S CERAMIC C1608 JB 1H 472K T A C143 4030006880 S CERAMIC C1608 JB 1H 472K T A C144 4030010070 S CERAMIC C1608X7S 1C 104K T A C145 4030010070 S CERAMIC C1608 X7S 1C 104K T A CUB 4030010070 S CERAMIC C1608X7S 1C 104K T A C1 7 4030006880 S CERAMIC C1608 JB 1H 472K T A 0148 4510004630 S ELECTROUTIC ECEV1CA100SR C149 4030010210 S CERAMIC...

Page 48: ...ODE 1SV263 TL 031 1750000270 S DIODE 1SS301 TE85R 032 1750000270 S DIODE 1SS301 TE85Rj RF UNIT REF NO ORDER NO DESCRIPTION D33 1790000620 S DIODE MA77 TW D34 1750000270 S DIODE 1SS301 TE85R D37 1790000450 S DIODE MA862 TX D38 1750000270 S DIODE 1SS301 TE85R D39 1750000270 S DIODE 1SS301 TE85R D40 1750000270 S DIODE 1SS301 TE85R D41 1750000270 S DIODE 1SS301 TE85R D42 1710000270 DIODE MI204 D43 171...

Page 49: ...144 6200003260 S COIL NL322522T 101J L145 6200003260 S COIL NL322522T 101J LI 46 6200003260 S COIL NL322522T 101J L147 6140000060 COIL LR 18 L149 6180000990 COIL LAL04NA 101K LI 50 2040000490 COIL EXC ELDR25C L151 6200001830 S COIL NL 322522T 100J LI 52 6200001830 S COIL NL 322522T 100J LI 53 6200003260 S COIL NL 322522T 101J LI 54 6200001830 S COIL NL322522T 100J LI 55 6180001000 COIL LAL04NA 102...

Page 50: ...9 7030003600 S RESISTOR ERJ3GEYJ 223 V 22 kQ R96 7030003580 S RESISTOR ERJ3GEYJ 1 03 V 1 0 kQ R180 7030003200 S RESISTOR ERJ3GEYJ 100 V 10 Q R97 7030003490 S RESISTOR ERJ3GEYJ 272 V 2 7 kQ R181 7030003520 S RESISTOR ERJ3GEYJ 472 V 4 7 kQ R98 7030003480 S RESISTOR ERJ3GEYJ 222 V 2 2 kQ R182 7030003480 S RESISTOR ERJ3GEYJ 222 V 2 2 kQ R99 7030003280 S RESISTOR ERJ3GEYJ 470 V 47 Q R183 7030003840 S R...

Page 51: ...CERAMIC C1808 JB IH 102K T A RF UNIT REF NO ORDER NO DESCRIPTION C89 4030006940 S CERAMIC C1608CH1H030C T A C90 4030007010 S CERAMIC C1808 CH1H100D T A C91 4030006880 S CERAMIC C1608 JB 1H472K T A C94 4030006990 S CERAMIC C1808 CH IH 080D T A C95 4030008910 S CERAMIC Cl 808 CH IH 0R5C T A C96 4030008880 S CERAMIC C1608 JB 1H472K T A C97 4030008880 S CERAMIC C1608 JB 1H472K T A C98 4030006880 S CER...

Page 52: ...RAMIC C1608 JB 1H472K T A C228 4030006870 S CERAMIC C1608 JB 1H222K T A C229 4030010070 S CERAMIC C1808 X7S 1C 104K T A C230 4030010070 S CERAMIC C1808 X7S 1C 104K T A C231 4030006880 S CERAMIC C1808 JB1H472K T A C232 4030006880 S CERAMIC Cl 608 JB1H472K T A C233 4030010070 S CERAMIC C1608 X7S 1C 104K T A C234 4030010070 S CERAMIC Cl 608 X7S 1C 104K T A C235 4030009970 S CERAMIC C1608 JB 1H 182K T...

Page 53: ...41 1590001330 S TRANSISTOR DTA114EU T107 Q42 1590000430 S TRANSISTOR DTC144EU T107 Q43 1590000430 S TRANSISTOR DTC144EUT107 Q44 1530002060 S TRANSISTOR 2SC4081 T107 R IF UNIT REF NO ORDER NO DESCRIPTION Q45 1580000620 S FET 3SK131 T2 MAS Q46 1580000620 S FET 3SK131 T2MAS Q47 1580000620 S FET 3SK131 T2MAS Q48 1580000620 S FET 3SK131 T2 MAS Q49 1580000620 S FET 3SK131 T2 MAS 050 1590000430 S TRANSIS...

Page 54: ...2291 COIL LS 450 L19 6150004480 COIL LS 499 L20 6150004450 COIL LS 496 L21 6150004450 COIL LS 496 L22 6150001200 COIL LS 133 L23 6180000950 COIL LAL03NA 150K L24 6200003260 S COIL NL322522T 101J L25 6200001830 S COIL NL322522T 100J L26 6180000960 COIL UL03NA 102K L27 2040000490 COIL EXC ELDR25C L28 2040000490 COIL EXC ELDR25C L29 2040000490 COIL EXC ELDR25C L30 2040000490 COIL EXC ELDR25C L31 2040...

Page 55: ...ERJ3GEYJ 473 V 47 kQ R78 7030003540 S RESISTOR ERJ3GEYJ 682 V 6 8 kQ R15S 7030003360 S RESISTOR ERJ3GEYJ 221 V 220 Q R79 7030003460 S RESISTOR ERJ3GEYJ 152 V 1 5 kQ R158 7030003340 S RESISTOR ERJ3GEYJ151 V 1S0Q R80 7030003460 S RESISTOR ERJ3GEYJ 152 V 1 5 kO R157 7030003480 S RESISTOR ERJ3GEYJ 222 V 2 2 kQ R81 7030003360 S RESISTOR ERJ3GEYJ 221 V 220 Q R158 7030003480 S RESISTOR ERJ3GEYJ 222 V 2 2...

Page 56: ...R ERJ3GEYJ 221 V 220 Q R265 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kQ R266 7030003760 S RESISTOR ERJ3GEYJ 474 V 470 kQ R267 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kQ R288 7030003720 S RESISTOR ERJ3GEYJ 224 V 220 kQ IF UNIT REF NO ORDER NO DESCRIPTION R269 7030003360 S RESISTOR ERJ3GEYJ 221 V 220 Q R270 7030003280 S RESISTOR ERJ3GEYJ 470 V 47 Q R271 7030003720 S RESISTOR ERJ3GEYJ 224 V 220 kQ R2...

Page 57: ...3810 ELECTROLITIC 50 MV R1 SW C27 4510003820 ELECTROLITIC 50 MV R22 SW C28 4030006880 S CERAMIC C1608 JB 1H 472K T A REF NO ORDER NO DESCRIPTION R342 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 kQ R343 7030003720 S RESISTOR ERJ3GEYJ 224 V 220 kQ R344 7030003630 S RESISTOR ERJ3GEYJ 393 V 39 kQ R345 7310002720 S TRIMMER RV 148 RH03A3AS3X0DA 472 R346 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kQ R347 703000...

Page 58: ...10070 S CERAMIC C1608 X7S 1C 104K T A C70 4030010070 S CERAMIC C1608 X7S 1C 104K T A Cl 53 4030010070 S CERAMIC C1608 X7S 1C 104K T A C71 4030006880 S CERAMIC Cl 608 JB 1H472K T A Cl 54 4510005000 ELECTROLITIC 16 MV 220 HC C72 4030007130 S CERAMIC C1808CH 1H 101J T A Cl 55 4510003840 ELECTROLITIC 50 MV 1 SW C73 4030010070 S CERAMIC C1608 X7S 1C 104K T A Cl 56 4030010070 S CERAMIC C1608 X7S 1C 104K...

Page 59: ... X7S 1C 104K T A C229 4030010070 S CERAMIC C1608 X7S 1C 104K T A C230 4030010070 S CERAMIC Cl 808 X7S 1C 104K T A J1 6450000170 CONNECTOR TCS4480 0 1 1111 C231 4030010070 S CERAMIC C1608X7S 1C 104K T A J2 6450000160 CONNECTOR TCS4470 0 1 1111 C232 4030006880 S CERAMIC Cl 608 JB 1H472K T A J3 6450000410 CONNECTOR HEC0470 0 1 630 C233 4030006880 S CERAMIC Cl 608 JB 1H472K T A J4 6450001130 CONNECTOR...

Page 60: ... L9 6180001220 COIL LAL04NA 100K Q28 1530002890 S TRANSISTOR 2SC41ie GR TE85R L13 6200003260 S COIL NL322522T 101J Q29 1530002690 S TRANSISTOR 2SC41ie GR TE85R 114 6200003260 S COIL NL 322522T 101J Q30 1560000330 S FET 2SK210 GR TE85R L15 6130001850 COIL LB 185 Q31 1590000680 S TRANSISTOR DTC114EU T107 Lie 6200001830 S COIL NL322522T 100J Q32 1560000330 S FET 2SK210 GR TE85R L17 6200003260 S COIL ...

Page 61: ... NL322522T 101J R73 7010004270 RESISTOR R20J 4 7 kQ L106 2040000490 COIL EXC ELDR25C R74 7030003320 S RESISTOR ERJ3GEYJ 101 V 100 Q LI 09 6200001710 S COIL NL 322S22T 220J R75 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kQ L110 6200003260 S COIL NL322522T 101J R78 7030003680 S RESISTOR ERJ3GEYJ 104 V 100 kQ L111 6200003260 S COIL NL322522T 101J R77 7030003340 S RESISTOR ERJ3GEYJ 151 V 150 Q L112 6200...

Page 62: ... 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 kQ R157 7030003400 S RESISTOR ERJ3GEYJ 471 V 470 Q R331 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kQ R158 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kQ R332 7030003640 S RESISTOR ERJ3GEYJ 473 V 47 kQ R159 7030003640 S RESISTOR ERJ3GEYJ473V 47kQ R333 7030003640 S RESISTOR ERJ3GEYJ473V 47kQ R180 7030003430 S RESISTOR ERJ3GEYJ 821 V 820 Q R334 7030003640 S RESISTOR ...

Page 63: ...T A C12 4030006880 S CERAMIC C1808JB1H472K T A C13 4030006860 S CERAMIC C1608 JB 1H 102K T A C16 4030007170 S CERAMIC C1608CH 1H221J T A PLL UNIT REF NO ORDER NO DESCRIPTION C17 4030008010 S CERAMIC C1608 TH 1H 150J T A C18 4030006910 S CERAMIC C1608 CH 1H0R5C T A C19 4030008010 S CERAMIC C1608TH 1H 150J T A C21 4030010070 S CERAMIC C1808 X7S 1C 104K T A C22 4030010070 S CERAMIC Cl 608 X7S 1C 104K...

Page 64: ...ERAMIC C1608 JB 1H 102K T A C216 4030007110 S CERAMIC Cl 608 CH 1H680J T A PLL UNIT REF NO ORDER NO DESCRIPTION C217 4030007000 S CERAMIC C1608 CH 1H 090D T A C218 4610001270 S TRIMMER ECR A010A12W C219 4030007090 S CERAMIC C1808 CH IH 470J T A C220 4030007020 S CERAMIC C1808CH1H120J T A C221 4030007020 S CERAMIC C1608 CH IH 120J T A C222 4030006880 S CERAMIC Cl 608 JB 1H472K T A C224 4030006940 S...

Page 65: ...JB 1H 1S2K T A C337 4030007150 S CERAMIC C1608 CH1H151J T A C338 4030008770 S CERAMIC Cl 808 JB 1H562K T A C339 4030006850 S CERAMIC C1608 JB 1H471K T A C349 4030007020 S CERAMIC C1608 CH 1H 120J T A C350 4030006950 S CERAMIC C1608 CH1H040C T A C351 4030007060 S CERAMIC C1808CH 1H270J T A C352 4030006930 S CERAMIC Cl 608 CH 1H020C T A C353 4030007060 S CERAMIC Cl 608 CH1H270J T A C354 4030006920 S...

Page 66: ...P 202 D 2 kQ R23 7030005390 S RESISTOR RR0816P 102 D 1 kQ R24 7030005400 S RESISTOR RR0816P 202 D 2 kQ R2S 7030005390 S RESISTOR RR0816P 102 D 1 kQ R26 7030005400 S RESISTOR RR0816P 202 D 2 kQ R27 7030005380 S RESISTOR RR0816P 102 B 1 kQ R28 7030005370 S RESISTOR RR0816P 202 B 2 kQ R29 7030005380 S RESISTOR RR0816P 102 B 1 kQ R30 7030005370 S RESISTOR RR0816P 202 B 2 kQ R31 7030005380 S RESISTOR R...

Page 67: ...18P 202 D 2 kQ R25 7030005390 S RESISTOR RR0816P 102 D 1 kQ R26 7030005400 S RESISTOR RR0816P 202 D 2 kQ R27 7030005380 S RESISTOR RR0816P 102 B 1 kQ R28 7030005370 S RESISTOR RR0818P 202 B 2 kQ R29 7030005380 S RESISTOR RR0816P 102 B 1 kQ R30 7030005370 S RESISTOR RR0816P 202 B 2 kQ R31 7030005380 S RESISTOR RR0818P 102 B 1 kQ R32 7030005370 S RESISTOR RR0818P 202 B 2 kQ Cl 4030006880 S CERAMIC C...

Page 68: ...OH050RN01 EP4 6910000610 BEAD FSOH050RN01 EPS 6910000830 BEAD FSOH070RN EPS 0910044003 PCB B 4302C REF NO ORDER NO DESCRIPTION IC1 1180001250 S IC TA7808F TE18L 01 1560000750 FET 2SK619 02 1560000730 FET 2SK408 03 1560000740 FET 2SK409 04 1560000820 FET MRF140MP SRFJ7004MP 05 1520000650 S TRANSISTOR 2SB1201 S TL 07 1520000650 S TRANSISTOR 2SB1201 S TL 08 1530002080 S TRANSISTOR 2SC4081 T107 R 09 1...

Page 69: ...10007590 CERAMIC HM15S3SL 6813 SOOV C22 4010005880 CERAMIC HM95S3 SL 2713 SOOV C24 4010005720 CERAMIC HM60S3 SL 3903 SOOV C2S 4010005870 CERAMIC HM95S3SL2213 SOOV C26 4010005780 CERAMIC HM60S3 SL 1013 SOOV REF NO ORDER NO DESCRIPTION C27 4010005660 CERAMIC HM60SJ SL 220J SOOV C28 4010005850 CERAMIC HMOSSJSL181J500V C29 4010005370 CERAMIC HM11SJSL 331 J SOOV C31 4010005780 CERAMIC HM60SJ SL 101J SO...

Page 70: ... 6200003260 S COIL NL322522T 101J L42 6180000450 COIL RFC L6 222K L43 6180000900 COIL UL03NA 101K L44 6180000900 COIL LAL03NA101K R3 7030007120 S RESISTOR ERJ1WYJ120H R4 7030007120 S RESISTOR ERJ1WYJ120H R5 7030003670 S RESISTOR ERJ3GEYJ 823 V 82 kC3 R6 7030003720 S RESISTOR ERJ3GEYJ 224 V 220 k 3 R7 7030003720 S RESISTOR ERJ3GEYJ 224 V 220 kQ R8 7030003670 S RESISTOR ERJ3GEYJ 823 V 82 kC2 R9 7030...

Page 71: ...7110 S CERAMIC Cl 608 CH 1H680J T A C26 4030007120 S CERAMIC C1808CH 1H820J T A CTRL UNIT REF NO ORDER NO DESCRIPTION C27 4030006880 S CERAMIC C1608 JB 1H472K T A C28 4030006880 S CERAMIC C1608 JB 1H472K T A C29 4030006860 S CERAMIC C1608 JB 1H 102K T A C30 4030006880 S CERAMIC Cl 608 JB 1H472K T A C31 4030006880 S CERAMIC Cl 608 JB 1H472K T A C32 4030010070 S CERAMIC Cl 608 X7S 1C 104K T A C33 45...

Page 72: ...P342 J4 6450000150 CONNECTOR JPJ2545 01 510 J6 6510003410 CONNECTOR B05B EH S J7 6510003410 CONNECTOR B05B EH S J9 6510017750 CONNECTOR 52044 1045 J11 6510017750 CONNECTOR 52044 1045 J12 6510017750 CONNECTOR 52044 1045 J13 6510003080 CONNECTOR RT01T 1 0B W1 7120000380 JUMPER JPW01 R 01 W2 7120000380 JUMPER JPW 01 R 01 W3 7120000380 JUMPER JPW01 R 01 W4 7120000380 JUMPER JPW 01 R 01 W5 7120000380 J...

Page 73: ...EF NO ORDER NO DESCRIPTION ME1 5510000430 METER ME 35 S2 2250000130 ENCODER SW 152 EC24B50B0013B W1 8900005320 FFC OPC 519 W3 8900005350 CABLE OPC 523 W4 8900005360 CABLE OPC 533 W5 8900005340 CABLE OPC 522 we 8900005340 CABLE OPC 522 W7 8900005330 CABLE OPC 526 WS1 8800034170 CABLE SX1528 P01FR EP1 6910008640 SENSOR UNIT MKE 250 2 115 010 18 EP2 6450001230 PLATE HU0999 01 480 REAR PARTS REF NO OR...

Page 74: ...N QTY S2 2250000130 Switch SW 152 1 W1 8900005320 Cable OPC 519 N 30 L 55 1 W3 8900005350 Cable OPC 523 N 10 L 100 1 W4 8900005360 Cable OPC 533 N 6 L 150 1 W5 8900005340 Cable OPC 522 N 6 L 100 1 W6 8900005340 Cable OPC 522 N 6 L 100 1 W7 8900005330 Cable OPC 526 N 16 L 100 1 FRONT PARTS DESCRIPTION QTY EP1 6910008640 Sensor unit MKE 250 2 1 EP2 6450001230 Plate HLJ0999 01 480 2 ME1 5510000430 Me...

Page 75: ... shield case cover n 8510008530 963 shield case H 8510008540 963 shield case cover 1 8510005330 Coll case 1 MP13 8510008300 963 DDS shield case 1 MP14 8510008310 963 DDS shield case cover 1 MP16 8510005330 Coll case 1 MP17 8510000881 194 VCO case 1 1 MP18 8510006510 1 94 VCO case cover E MP19 8510005980 724 shield case n MP20 8510005990 724 shield case cover H MP21 8510008530 963 shield case 1 MP2...

Page 76: ...15 8950000180 Cable tie 80 MP17 8850001540 Insulation flat washer P MP18 8930037710 Sheet AW UNPACKING REF NO ORDER NO DESCRIPTION QTY FI 5210000430 Spare fuse FGMB 125V 12A 100 120 V versions 2 5210000410 Spare fuse S505 N5A T 220 240 V versions 2 F2 5210000040 Spare fuse FGB 2A 100 120 V versions 2 5210000360 Spare fuse S506 T 250V 2A 220 240 V versions 2 J1 5610000010 External speaker plug AP30...

Page 77: ...10 F MP23 F MP35 C MP13 C P W15 C J7 RF v CD CD O O O O CD O O O O O O CD CD O CD O O CD O O O O O CD O O O O O O CD CD CD CD CD O O O CD O O O CD O O CD CD CD O O O CD CD CD O O O MP26 C ACC 2 ACC 1 MP20 C MP9 C MP21 C J1 IF J6 IF Unit abbreviations C CHASSiS PARTS F FRONT PARTS J JACK UNIT MIC MIC UNIT RF RFUNIT IF IF UNIT ...

Page 78: ......

Page 79: ...Unit abbreviations C CHASSIS PARTS ...

Page 80: ... 5 ...

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Page 83: ......

Page 84: ......

Page 85: ...21SO Symbol QO 2SC4081 R Symbol BR 2SC4403 3 Symbol LY3 2SC4116BL GR Y Symbol LU LG LY 2SC4673D Symbol CO 2SC1619 Symbol TF 2SD1623 Symbol DF 2SD1801S Symbol CE 2SD1817 Symbol IK 2SJ144 GR Symbol VQ 2SK210GR Symbol YG 2SK515T1BPC33 Symbol X33 2SK2171 No symbol 2SK880Y Symbol XY 8 1 ...

Page 86: ...0 Symbol A3 1SS301 Symbol B3 1SS302 Symbol C3 1SS312 Symbol BF 1SS319 Symbol A4 1SV263 Symbol JV 1SV285 No symbol DAN202U Symbol N DAP202U Symbol P HSM88AS Symbol Cl HSM88ASR Symbol C3 P MA862 Symbol Ml I t ND411G 2 Symbol 411 RD13M T2B1 Symbol 31 RD5 1M B2 Symbol 512 RD6 2M B2 Symbol 622 SVC252 Symbol HV ...

Page 87: ...F BOW IF UNIT J30 SECTION d BOARD LAYOUTS 9 1 DSP UNIT IC 775DSP only ...

Page 88: ...B4365IJ Hi X siT f TT It ll u m 5 P3 a y Q a o o o o s 1 FR0J 1 MAIM UNIT J11 FROM MAIN UMIT J1 I ...

Page 89: ...9 2 SW A UNIT SW AUNIT 9 2 ...

Page 90: ...The combin tion of this page and the next page show the unit layout in the same oohfiguration as the actual P C Board MIC UNIT ...

Page 91: ... SW AUNIT 9MND 15ND ANOO NOTO PBTF acoi ...

Page 92: ...LIMIT J1 3 9 3 TovR A ij jirj4 ...

Page 93: ...9 3 SW B AND DISPLAY UNITS SW B UNIT DISPLAY UNIT 9 4 ...

Page 94: ... VR B UNIT VR C UNIT j j AgNiT Ji RITUNIT T UHI j9 ...

Page 95: ...9 4 VR A UNIT ICOM jglr RilfbO R45 O jTlWSHiT ...

Page 96: ...9 5 TOSw ft yNiT qj ...

Page 97: ...N UNIT h CM H CJ 3 z D O H P6_ o o a P1 EXSP SPE AFO AFE MIGE MIG2 j RXAF RXAF MAFE MAF o o o a o o o o u d ICOM Vinnr jJULjyi Q Z o LU CL 3 I CM UJ a COi C5 O LJL w S I I I I N TO MIC UNIT J1 T0VR AUNITJ1 9 6 ...

Page 98: ..._l O Q CD o Q la 1 o LU o ir CC Q_ z 1 1 1 1 1 J 1 V V TOIFUNITJ23 TO IF UNIT J22 TO fF U ...

Page 99: ... try lE 0 1 Q rt QC _I CQ CD an 2 H 1 z Ll CO CO 0 f 1 1 1 a cc X LU c CO ID U_ Q 00 tE cc Q CL h 0 0 0 v 0 0 1 1 1 1 1 1 V TO SW AUMITJ6 TO IF UNIT ...

Page 100: ...o ca 1 Lf o oo Ll CL yj S o 1 1 1 1 1 V T0PLLUNITJ11 TO DSP UNIT J2 TO DSP UNIT J3 ...

Page 101: ...9 6 RF UNIT FROM PLl UNIT JiO TO PUL UNIT J ...

Page 102: ......

Page 103: ...TO IF UNIT JB 9 7 TO IF UNIT J2S ...

Page 104: ... o J wc o JC o WIG a MIGE j PI FROM PUUNITJ P6 FROM PLLUNITJe RBFO FROM CTRL UNIT J3 m t 2 o FSy K DATA STQ4 MET GMD CK STBR STB STS3 STBl TRG FIV JD UNLK CW3V TSV R3V DSND Key DSHR NBVR BNOV NBOl SOLV POC SOLS REO a z 3 uv 14V 14V 14V GND GND WIXB GND GND MDiA ...

Page 105: ...TO RF UNIT J1 FROM RF UMIT J3 MBFO o o Q Si o o ...

Page 106: ...PLL J ROM PLL UNIT J 7 TBFO 9 a ...

Page 107: ... J mm C i 1 n _S a uj f 5 00 II m 1 o o LU I o LU ET Cl LU LU _l LU CC ...

Page 108: ...9 8 PLL UNIT ...

Page 109: ... dds a b c d board Q O 9 5 I a yj Cl Z E Z O Lif LJJ I I g i I TO PtL UNIT z D PkQ P2 I LOe rrrow Rf unit TO RF UWITJ UKRO ICOM MPISJO sS3PE fl 2l bD B a Q Sr H _s 3LO t TOIF LNITJUJ ...

Page 110: ... S aeaB l o MjUUUJLfl fE1 IQ O TiTijiriry ft n R LOJUL on CO on ict O TiJTiro riT rr H a CJ D C I MKRO a MKIT L JGNU GWD CL 3 V Zf d 14 o TO IF UMT JO ...

Page 111: ...jTOiFUhirjii iTCi FUWl jl3 rOlF USJIT J12 TO IF U lF JU TOMA f Jli 9 9 ...

Page 112: ...9 9 PA UNIT TOmTERUNlTJZ ...

Page 113: ......

Page 114: ...9 10 FILTER UNIT ...

Page 115: ...FROM CTRL UNIT J3 FRCW CTRL UNIT Ji 1 1 TO F A UNIT ...

Page 116: ...9 t1 CTRL UNIT TO FILTER UNIT J TO RELAY UMlTrjT TOMiMNUNIT 9 12 ...

Page 117: ...is L r 6 o 6 6 6m f2 t c u a 1 a S 1 U LL LU c tD g J A V u r f V Li Li TOMai J UN it j It TO IF UNIT JtJ FHOMTljNER MF1 FROM TUNER UF2 ...

Page 118: ...287C 9 12 RELAY UNIT 9 13 TO FILTER UNIT J11 ...

Page 119: ...10 1 ...

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Page 128: ...10 2 ...

Page 129: ... B44il V3A 72 u V4A R324 Ik 1_ CTO unn 322 2 1 H VUU B323 5 nr 3 All AC C0N2 CLK Q5 CONI Qg CONO BMUT 1 03 OB S s Ss d IC14 BU40946CF sX X X o T 023 I 330y U T328 VTir R32By nr s si si nr fTT t TTT w l7T PDA R337 PCK R338 CONO B33b2 CONI R340 C0N2 tmtj 47k POSB T34 47k PDA PCK r l o a 4vss g 4 SYSCLKOg VSS VSS2 I VDO f DAO DAI DA2 if 0 2 DA4 g DAS VSS IT 0A6 0A7 DAS 0A9 DA10 if DA11 ff VSS I XiXiX...

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Page 134: ...C95 ...

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Page 138: ...s L29 I 1 L27 1 L25 1 L23 IOOmH C70 15P lOOpH lOOpH lOO iH ...

Page 139: ...10 5 ...

Page 140: ......

Page 141: ......

Page 142: ...081 1 n BPF r IOC f a FM MOD IC12 YaPC1037 IC21 L SUB TONE JmH MOD AF 1 SELECTOR FIS SFEia 7MS2 A Q13 Q14 3SK1S1 3SK131 if 1 AGC T AGC 1C 7 032 Buikt C SEIECTObHCi Q17 18 2SC3 647 1 CFL DC AC I n CONV CFL BACK LIGHT IC17 IC23 TC4S5R4F NJM2902 DELAY CONTROL A vox IC24I IC7a JM4558 1 vox GAIN L 0 APF o 246 ANTI VOX J APF EEP bu7T MAIN UNIT ...

Page 143: ......

Page 144: ...1 K4n6 04 2SK210 1 n PHASE 1 N ic 6 r eJ BMItCi 1 AIC5 C7163 l PU 2304116 r C jUFF LOOP FILTER 1 U Q28 REG UNIT 13 BV 1 REG o A 28V 1 0 A CONV PLL UNIT Fi2 SFE10 7MS2 A 0 6 ...

Page 145: ...nada A Division of Icom America Inc 3071 5 Road Unit 9 Richmond B C V6X 2T4 Canada Phone 604 273 7400 Fax 604 273 1900 Icom Europe GmbH Communication Equipment Himmelgeister Str 100 D 40225 DCisseldorf Germany Phone 021 1 346047 Fax 0211 333639 Icom Australia Pty Ltd A C N 006 092 575 7 Duke Street Windsor Victoria 3181 Australia Phone 03 9529 7582 Fax 03 9529 8485 Icom UK Ltd Unit 9 Sea St Herne ...

Page 146: ... Hint on us Icom Inc A 5340H S 6 9 16 Kamihigashi Hirano ku Osaka 547 Japan Printed in Japan Copyright 1 995 by Icom Inc ...

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Icom IC-775, Service Manual

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