Сервис мануал для icom 718

1. Manuals
2. Brands
3. Icom Manuals
4. Transceiver
5. IC-718
6. Service manual

Quick Links

• Page 1
  HF TRANCEIVER iC-718…
• Page 2
  This service manual describes the latest service information NEVER connect the transceiver to an AC outlet or to a DC for the IC-718 HF TRANCEIVER at the time of publication. power supply that uses more than 16 V. This will ruin the transceiver.

• Page 3: Table Of Contents

  TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPTION 4 – 1 RECEIVER CIRCUITS ……………………4 – 1 4 – 2 TRANSMITTER CIRCUITS ………………….4 – 4 4 – 3 PLL CIRCUIT ……………………..4 – 5 4 –…

• Page 4: Specifications

  SECTION 1 SPECIFICATIONS GENERAL RECEIVER • Frequency coverage • Receive system : Double-conversion Receive 0.030–29.999999 MHz* superheterodyne Transmit 1.800–1.999 MHz* 3.500–3.999 MHz* • Sensitivity (10 dB S/N) 7.000–7.300 MHz 10.100–10.150 MHz SSB, CW, RTTY 0.16 µV* (1.8–29.999999 MHz) 14.000–14.350 MHz 18.068–18.168 MHz 13 µV (0.5–1.799999 MHz) 21.000–21.450 MHz 24.890–24.990 MHz 2.0 µV*…

• Page 5: Inside Views

  SECTION 2 INSIDE VIEWS ¡Top view (PA AND FILTER UNITS) PA unit Filter unit Predrive amplifier (Q1: 2SC1971) Tx/Rx switching relay (RL13: AG201344) SWR detector Drive amplifier (L13: LR-391) (Q2, Q3: 2SC3133) Power amplifier (Q4, Q5: 2SC2904) Tx low-pass filters (L13: LR-391) ¡Bottom view (MAIN AND PLL UNITS) 2nd mixer circuit…

• Page 6: Disassembly Instructions

  SECTION 3 DISASSEMBLY INSTRUCTIONS • Removing the covers • How to connect the coaxial cable Remove 14 screws from the top and bottom covers. Connect the coaxial cable as shown in below. J701 to MAIN unit PA unit FILTER unit •…

• Page 7: Circuit Description

  SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS (3) 2.0–30.0 MHz The signals pass through a high pass filter (L811–L814, 4-1-1 RF SWITCHING CIRCUIT C811–C817) to suppress excessively strong signals below (FILTER AND MAIN UNITS) 2.0 MHz, such as from broadcasting stations. The filtered The RF switching circuit leads receive signals to bandpass signals are applied to a low-pass filter and one of 5 band- filters from the antenna connector while receiving.

• Page 8: Pll Unit

  2nd LO signal, and are then applied to the NB circuit. BFO (Beat Frequency Oscillator) frequency is used at the SSB/CW detector and the balanced modulator. The IC-718 • Exact 2nd IF frequency uses a DDS IC for the BFO circuit.

• Page 9: Logic Unit

  4-1-10 SSB/CW DEMODULATOR CIRCUITS When the strong signal disappears, C1804 and R1809 release the AGC line voltage in CW or RTTY mode to obtain (MAIN UNIT) a fast AGC release time. While in SSB or AM mode, C1803, In SSB or CW mode, the 2nd IF signal from the IF amplifier C1805, R1808 and C1802, R1807 are connected in parallel (Q1601) is mixed with the BFO signal from the PLL unit at to obtain a appropriate AGC characteristics (middle or slow…

• Page 10: Transmitter Circuits

  The ALC (Automatic Level Control) circuit controls the gain of IF amplifiers in order for the IC-718 to output a constant RF power set by the [RF PWR] control even when the sup- 4-2-4 IF AMPLIFIER (MAIN UNIT) plied voltage shifts, etc.

• Page 11: Pll Circuit

  When the “FOR” voltage exceeds the “POCV” voltage, ALC While transmitting, PAT8 voltage is provided to MF1 via R30. bias voltage from IC1701c (pin controls the IF amplifiers Thermistor R30 on the PA unit detects the temperature of (Q151, Q502). This adjusts the output power to the deter- Q4.

• Page 12: Logic Circuits

  The memory channel information is stored in the EEPROM (IC2). 4-4 LOGIC CIRCUITS The Icom CI-V network system allows the IC-718 to be remotely controlled by a personal computer using an RS- 4-4-1 BAND SELECTION DATA (MAIN UNIT) 232C I/O port.

• Page 13: Adjustment Procedures

  RF power meter the antenna connector. to [DC 13.8 V] DC power supply Ammeter to [EXT SP] Distortion meter Speaker • Microphone connector (Front panel view) IC-718 Audio generator Pin 1 Pin 7 Pin 6 Pin 5 5 — 1…

• Page 14: Pll Adjustments

  5-2 PLL ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST Turn L6, L7 on the PLL unit to downside for REFERENCE • Display frequency: Any Connect a frequency presetting until the frequency counter reads FREQUENCY • Set C16 as illustration at below. counter check frequency.

• Page 15
  • PLL unit 2nd LO check point Reference frequency check point Reference OSC level adjustment Reference freauency Reference adjustment frequency pre-setting 1st LO 1st LO output level check point C165 VCO lock voltage adjustment 5 — 3…

• Page 16: Transmitter Adjustments

  5-3 TRANSMITTER ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST IDLING • Display frequency: 14.10000 MHz Connect an ammeter At the point where the CURRENT • Mode : USB (3 A) between power Tx current Increases •…

• Page 17
  • PA unit • FILTER unit SWR detector check point Idling current adjustment SWR detector (Driver) pre-setting SWR detector Idling current adjustment adjustment (Final) • MAIN unit CP4002 Ic APC pre-setting L106 L151 L301 L302 Tx total gain L303 adjustment L501 R503 J3601…
• Page 18
  TRANSMITTER ADJUSTMENTS—continued ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST CARRIER • Display frequency: 14.10000 MHz Rear Connect a spectrum Minimum carrier level MAIN R2303 SUPPRESSION • Mode : USB panel analyzer to the [ANT] • Mic gain : Minimum (0) connector through an •…
• Page 19
  • MAIN unit CP3701 CW carrier check point R2303 Carrier suppression adjustment R2321 AM modulation adjustment R3703 (or AM carrier pre-setting) CW carrier adjustment R2385 AM carrier and R1730 AM modulation AM carrier pre-setting adjustment 5 — 7…

• Page 20: Receiver Adjustments

  5-4 RECEIVER ADJUSTMENTS Receiver total gain adjustment must perform after transmitter total gain adjustment. ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST RECEIVER • R2701 (MAIN unit): Center Rear Connect an AC milli- Maximum audio output MAIN L1103, ˚…

• Page 21
  • MAIN unit L1103 L1201 L1202 L1502 Noise blanker adjustment L1501 Rx total gain adjustment CP1501 Noise blanker check point L1621 L1614 R2701 Rx total gain pre-setting 5 — 9…

• Page 22: Set Mode Adjustment

  5-5 SET MODE ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Enter set mode adjustment for RX: Push [SET] key to enter the RX set- ENTERING ting. SET MODE 1 Turn power OFF. ADJUSTMENT 2 Terminate the [REMOTE] jack with a Or push [UP] key to skip the set FOR RX 3.5(d) mm mini-plug.

• Page 23
  SET MODE ADJUSTMENT —continued ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Connect a 50 Ω dummy load or power Transmit using an external PTT SWR METER meter to [ANT] connector. switch to set SWR reference level after pushing [SET]. • Connect a 100 Ω dummy load or power Transmit using an external PTT meter to [ANT] connector.

• Page 24: Front Unit

  OPC-885 8900008930 CABLE OPC-885 6050009870 S.XTAL CR-567 (9.8304 MHz) 8900006990 CABLE OPC-683 6200001830 S.COIL NL 322522T-100J 8970023640 E.OTHER SX2242 ICOM SHIELD (1)/FR 6200001830 S.COIL NL 322522T-100J 6200003260 S.COIL NL 322522T-101J 6200002040 S.COIL NL 252018T-101J 6910012480 E.OTHER RMS20-250-201-1R 6200002040 S.COIL NL 252018T-101J 6450001230 E.OTHER…

• Page 25: Logic Board

  [LOGIC BOARD] [LOGIC BOARD] ORDER ORDER DESCRIPTION DESCRIPTION 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) R197 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) R198 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) ERJ3GEYJ 821 V (820 Ω) 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) R199…

• Page 26: Main Unit

  [LOGIC BOARD] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 0910052055 PCB B 5382E 1110004080 S.IC µPC2709T-E3 6910012350 S.BEAD MMZ1608Y 102BT IC1701 1110003870 S.IC NJM2058M-T1 EP40 6910012350 S.BEAD MMZ1608Y 102BT IC1751 1110002700 S.IC NJM2904M-T1 EP45 6910012350 S.BEAD MMZ1608Y 102BT IC2001 1110004870 S.IC TA4101F (TE12L) EP46 6910012350 S.BEAD…

• Page 27
  [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION D304 1790000620 S.DIODE MA77 (TX) L106 6150004270 COIL LS-483A (C-14924) D305 1790000620 S.DIODE MA77 (TX) L151 6150004280 COIL LS-484B (C-14927) D306 1790000620 S.DIODE MA77 (TX) L152 6200003260 S.COIL NL 322522T-101J D401 1750000430 S.DIODE HSB88WSTR L153 6200003550 S.COIL…
• Page 28
  [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION L3502 6180000960 COIL LAL 03NA 102K R633 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) ERJ3GEYJ 101 V (100 Ω) L4501 6200003950 S.COIL HF50ACC 322513-T R634 7030003320 S.RESISTOR L4651 6200003950 S.COIL HF50ACC 322513-T R635 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ)
• Page 29
  [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R1523 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) R2105 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) ERJ3GEYJ 470 V (47 Ω) R1601 7030003280 S.RESISTOR R2106 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) ERJ3GEYJ 471 V (470 Ω) R1602 7030003400 S.RESISTOR…
• Page 30
  [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 471 V (470 Ω) R2901 7030003400 S.RESISTOR C106 4030008650 S.CERAMIC C1608 JB 1H 332K-T-A ERJ3GEYJ 4R7 V (4.7 Ω) R2902 7030004040 S.RESISTOR C107 4030008470 S.CERAMIC C1608 JB 1H 272K-T-A R3001 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) C108 4030011600 S.CERAMIC…
• Page 31
  [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C851 4030011600 S.CERAMIC C1608 JB 1C 104KT-N C1511 4030011340 S.CERAMIC C1608 CH 1H 471J-T-A C852 4030011340 S.CERAMIC C1608 CH 1H 471J-T-A C1512 4510004440 S.ELECTROLYTIC ECEV1HA010SR C853 4030007110 S.CERAMIC C1608 CH 1H 680J-T-A C1513 4510004640 S.ELECTROLYTIC ECEV1CA470SP C854…
• Page 32
  [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C2314 4030011600 S.CERAMIC C1608 JB 1C 104KT-N C4107 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A C2315 4510005810 S.ELECTROLYTIC ECEV1HAR47R C4200 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A C2352 4030006870 S.CERAMIC C1608 JB 1H 222K-T-A C4201 4030007090 S.CERAMIC C1608 CH 1H 470J-T-A…
• Page 33
  ERJ3GEYJ 101 V (100 Ω) 7030003320 S.RESISTOR 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) ERJ3GEYJ 471 V (470 Ω) 8970023610 E.OTHER SX2242 ICOM SHIELD (1)/MA 7030003400 S.RESISTOR ERJ3GEYJ 101 V (100 Ω) 8970023660 E.OTHER SX2242 J LEAD SET (2)/MA 7030003320 S.RESISTOR 7030003560 S.RESISTOR…
• Page 34
  [PLL UNIT] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R105 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A R106 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A R107 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A R108…
• Page 35
  ERJ3GEYJ 4R7 V (4.7 Ω) 7030004040 S.RESISTOR ERJ3GEYJ 681 V (680 Ω) 8970023621 E.OTHER SX2242 0.8D COAXIAL TUBE (2)/PL 7030003420 S.RESISTOR 8970023630 E.OTHER SX2242 ICOM SHIELD (1)/PL 7510000130 THERMISTOR ERT-D2FHL 333S 7030003470 S.RESISTOR ERJ3GEYJ 182 V (1.8 kΩ) ERJ1WYJ100U (10 Ω) 7030006130 S.RESISTOR ERJ1WYJ100U (10 Ω)

• Page 36: Filter Unit

  [PA UNIT] [FILTER UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030004740 S.CERAMIC C2012 JB 1H 472K-T-A L100 6200005050 S.COIL NL 252018T-330J [EUR], [ITA], [FRA], [ESP] L101 6200005050 S.COIL NL 252018T-330J 4030005140 S.CERAMIC C3216 JB 1E 104K-T-A L102 6200005010 S.COIL NL 252018T-100J [EUR], [ITA], [FRA], [ESP] L103 6200005050 S.COIL NL 252018T-330J…

• Page 37
  4010005930 CERAMIC HM11SJ SL 391J 500V 4010005930 CERAMIC HM11SJ SL 391J 500V 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A 2710000520 FAN SB0812H-ICOM-00 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A 8900009501 CABLE OPC-939A 4030006880 S.CERAMIC…
• Page 38
  QTY. REF NO. DESCRIPTION QTY. 6510000370 ANT connector MR-DS 2510000670 Speaker VS-50-0827 2710000520 Fan SB0812H-ICOM-00 6910012480 Sensor RMS20-250-201-1R 6450001230 Snap plate HLJ0999-01-480 8930021010 Domed plug DP-500 6910000310 B312D insulation washer 8210016660 2241 front panel (A) 6910000340 P101 KD insulation sheet…
• Page 39
  MP22 (C) MP14 (C) MP14 (C) MP22 (C) MP20 (C) MP20 (C) MP2 (C) EP2 (C) EP3 (C) MP20 (C) MP15 (C) MP20 (C) MP1 (L) MP22 (C) MP3 (L) MP22 (C) EP70 (L) MP26 (C) PA UNIT MP22 (C) MP23 (F) FILTER UNIT MP2 (L)
• Page 40
  SECTION SECTION 8 PARTS LIST SEMI-CONDUCTOR INFORMATIONS 8-1 TRANSISTORS 8-2 DIODES NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW NAME SYMBOL INSIDE VIEW 2SA1576A R 1SS184 2SK882-GR MA29B DAN202K 2SC1971 None 2SC3133 None 1SS226 2SK2171-4 1SS375-TL MA77 DA221 TL 2SC2714-O…
• Page 41
  SECTION 9 BOARD LAYOUTS 9-1 MAIN UNIT The combination of this page and the next page shows the unit layout in the same configuration as the actual • TOP VIEW J4651 P.C. Board. to FILTER unit J1 to PA unit J6 to FILTER unit J3 SEND T13V…
• Page 42
  9-2 PLL UNIT • TOP VIEW 2nd LO to MAIN unit J401 to MAIN unit J2001 BFOE 2LOE The combination of this page and the previous page shows the unit layout in the same configuration as the actual P.C. Board. MAIN UNIT •…
• Page 43
  The combination of this page and the next page shows 9-3 LOGIC BOARD the unit layout in the same configuration as the actual • TOP VIEW P.C. Board. 9-4 PHONE BOARD 9-5 MIC BOARD 9-6 VR BOARD • TOP VIEW •…
• Page 44
  The combination of this page and the previous page LOGIC UNIT shows the unit layout in the same configuration as the • BOTTOM VIEW actual P.C. Board. SEN2 SENSOR SEN1 SQLS SEND MICE to MIC board J2 to VR board J1 ESPO ESPO ESPO…
• Page 45
  The combination of this page and the next page shows 9-7 FILTER UNIT the unit layout in the same configuration as the actual • TOP VIEW P.C. Board. to MAIN unit J701 to PA unit J7 CHASSIS CHASSIS 2 4 6 8 10 1 3 5 7 9 ANTENNA to LOGIC unit J4001…
• Page 46
  The combination of this page and the previous page FILTER UNIT shows the unit layout in the same configuration as the • BOTTOM VIEW actual P.C. Board. 9 — 6…
• Page 47
  9-8 PA UNIT to MAIN unit J4101 • TOP VIEW to FILTER unit J2 to MAIN unit J1 VARISTOR BOARD CHASSIS CHASSIS BROWN ORANGE STAR YELLOW BLACK BLACK The combination of this page and the next page shows the unit layout in the same configuration as the actual P.C.
• Page 48
  PA UNIT • BOTTOM VIEW The combination of this page and the previous page VARISTOR BOARD shows the unit layout in the same configuration as the actual P.C. Board. 9 — 8…

• Page 49: Block Diagram

  SECTION 10 BLOCK DIAGRAM below 1.6 M Q1508 2SC4081 Q1509 DTA114 GATE IC2101A IC2701 CTRL 1.6–2 M OPTION M5282FP NJM2058 D1501 Q1503 Q1502 Q1501 AFGV 2SK882 2SK882 2SK882 1SS375 UT-102 UT-102 Q1506 Q1507 SIDE TONE/BEEP DTC114 2SC4081 NOISE NOISE NOISE 2–4 M MAIN UNIT LEVEL…

• Page 50: Wiring Diagram

  SECTION 11 WIRING DIAGRAM CHASSIS FRONT UNIT LOGIC J4401 STRT STRT UNIT SNDS SNDS J4101 FSKK FSKK STAR MICE MICE SEND SEND SENSOR SQLS SQLS SEND SEND PA UNIT SEND SEND PAT8 PAT8 SEND SEND ASC2 SEN1 SEN1 PHOE PHOE SEN2 STAR STAR…

• Page 51: Voltage Diagrams

  SECTION 12 VOLTAGE DIAGRAM CHASSIS PLL unit J4 PLL unit J1 – 1LOE 2LOE SB0812H-ICOM-00 12-1 FILTER, PA and MAIN unit J3601 1st Lo 2nd Lo J201 J401 Tx: 0V C511 Q511 AM ON: 0.6V AM ON: 0.6V Rx: 3.5V DTC114EE except AM: 3.4V…

• Page 52: Pll Unit

  7.9V 3.2V 10µH R191 180 L40 100µH : 6.0V : 8.1V 3.9V Lo : 5.6V 2SD1619 T Lo : 11.0V C194 0.0047 OFF: 4.4V OFF: 13.0V 10µH LW-25 470p 10µH 2SC4081 R C106 C109 2.0V 1.3V 0.0047 0.0047 0.82µH DS70 DS73 DS76 DS79…

• Page 53
  6-9-16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan Phone : 06 6793 5302 : 06 6793 0013 : http://www.icom.co.jp/world/index.html < > Corporate Headquarters Communication Equipment 2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A. Himmelgeister Str. 100, D-40225 Düsseldorf, Germany Phone : ( 425 ) 454-8155…
• Page 54
  Count on us! S-13701MZ-C1 6-9-16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan © 2000 Icom Inc.

• Page 1
  INSTRUCTION MANUAL HF ALL BAND TRANSCEIVER i718…

• Page 2: Explicit Definitions

  RF output power to less than the linear amplifier’s maximum input level, otherwise, the linear amplifier will be damaged. Use Icom microphones only (supplied or optional). Other manufacturer’s microphones have different pin assignments, and connection to the IC-718 may damage the transceiver. DEFINITION…

• Page 3: Table Of Contents

  IMPORTANT … i EXPLICIT DEFINITIONS … i PRECAUTIONS … i 1 TABLE OF CONTENTS … 1 SUPPLIED ACCESSORIES … 1 2 PANEL DESCRIPTION … 2–8 n Front panel … 2 n Function display … 5 n Rear panel … 6 n Microphone (HM-36) …

• Page 4: Panel Description

  PANEL DESCRIPTION n Front panel Speaker IC-718 PHONES q POWER SWITCH [PWR]  Push momentarily to turn power ON. • Turn the optional DC power supply ON in advance.  Push for 1 sec. to turn power OFF.  While pushing and holding [SET], push [PWR] to enter the initial set mode.

• Page 5
  • Push several times (or push and hold) [√ DN]/[UP ∫] until desired memory channel appears. • After pushing [F-INP/ENT], push desired memory channel number from the keypad, then push [FINP/ ENT] again to select the memory channel directory. • Push [CH] to exit the memory channel select function. !2 MEMORY CHANNEL (BAND) UP/DOWN SWITCHES [√…
• Page 6
  PANEL DESCRIPTION n Front panel MODE FILTER SHIFT LOCK @2 VFO/MEMORY SWITCH/1 [V/M•1] (pgs. 16, 35)  Toggles the operating mode between VFO mode or memory mode when pushed. @3 MEMORY WRITE SWITCH/4 [MW•4] (p. 36)  Stores the displayed frequency and operating mode into the selected memory channel when pushed for 1 sec.

• Page 7: Function Display

  n Function display q LOCK INDICATOR (p. 19) Appears when the dial lock function is in use. w RECEIVE INDICATOR Appears while receiving a signal or when the squelch is open. e TUNE INDICATOR Appears while the automatic tuning function is activated.

• Page 8: Rear Panel

  When connecting a paddle i ALC INPUT JACK [ALC] Connects to the ALC output jack of a non-Icom linear amplifier. o SEND CONTROL JACK [SEND] (p. 14) Goes to ground while transmitting to control external equipments such as a liner amplifier.

• Page 9
  D ACC SOCKET INFORMATION • ACC socket PIN # NAME Regulated 8 V output. Connects to ground. Input/output pin. Goes to ground when transmitting. SEND When grounded, transmits. Data line for the optional AT-180. Band voltage output. BAND (Varies with amateur band) ALC voltage input.

• Page 10: Microphone (Hm-36)

  PANEL DESCRIPTION n Microphone (HM-36) q UP/DOWN SWITCHES [UP]/[DN] Change the selected readout frequency or memory channel. • Continuous pushing changes the frequency or memory channel number continuously. • The [UP]/[DN] switch can simulate a key paddle. Preset in the CW PADDL in initial set mode. (p. 31) •…

• Page 11: Installation And Connections

  In this case, an antenna tuner is useful to match the transceiver and antenna. Low SWR allows full power for transmitting even when using the antenna tuner. The IC-718 has an SWR meter to monitor the antenna SWR continuously. connect the…

• Page 12: Required Connections

  INSTALLATION AND CONNECTIONS n Required connections • Front panel MICROPHONES (p. 55) HM-36 • Rear panel ANTENNA (p. 56) [Example]: 1.8–30 MHz bands GROUND (p. 9) Use the heaviest gauge wire or strap available and make the connection as short as possible.

• Page 13: Advanced Connections

  RF/SQL PHONES HEADPHONES [REMOTE] (p. 57) Used for computer control and transceive operation. AH-2b ACC SOCKETS (p. 7) [SEND], [ALC] (p. 14) Used for connecting a non-Icom linear ampli- fier. MODE M-CL F-INP COMP SHIFT P.AMP TUNER LOCK EXTERNAL SPEAKER (p. 55)

• Page 14: Power Supply Connections

  INSTALLATION AND CONNECTIONS n Power supply connections Use an optional PS-85 DC POWER SUPPLY w operating the IC-718 with AC power. Refer to the diagrams below. CONNECTING PS-85 DC POWER SUPPLY CONNECTING NON-ICOM DC POWER SUPPLY CONNECTING A VEHICLE BATTERY…

• Page 15: Liner Amplifier Connections

  AC outlet (Non-European versions : 100–120/220–240 V European version CONNECTING THE IC-4KL OPC-599 conversion cable 9 10 11 12 1 2 3 4 IC-718 Remote control cable (supplied with the IC-PW1) ACC cable (supplied with the IC-PW1) OPC-599 conversion cable (option)

• Page 16: External Antenna Tuners

  DC 2 A. If this level is exceeded, a large external relay must be used. Control cable AH-4 Ground Turn the IC-718’s power OFF when connecting the AT-180, otherwise, the CPU may malfunction and the AT-180 may not function properly. ACC cable supplied with the AT-180 [ACC]…

• Page 17: Frequency Setting

  n When first applying power B e f o r e f i r s t a p p l y i n g p o w e r , m a k e s u r e a l l connections required for your system are complete by referring to Chapter 3.

• Page 18: Vfo Description

  VFO description VFO is an abbreviation of Variable Frequency Oscillator, and traditionally refers to an oscillator. The IC-718 VFO can store a frequency and an operating mode. You can call up a desired frequency to the VFO with the keypad or the memory transfer function (see p. 37).

• Page 19: Frequency Setting

  M=CL FREQUENCY SETTING • For general coverage receiver use The IC-718 has a general coverage receiver band. q Push [∫ UP] or [√ DN] one or more times to select the general coverage receiver band. Note: Even if you select the ham band, you can set the transceiver to the general coverage frequency.

• Page 20
  15.10000 MHz D Band selection All HF ham bands and a general coverage receiver band are included in the IC-718. Push [∫ UP]/[√ DN] to select the desired band. • Pushing [∫ UP]/[√ DN] continuously scrolls through the available bands.

• Page 21: Dial Lock Function

  D 1 Hz and 10 Hz tuning steps When the programmable tuning step, “,” disappear, rotating the tuning dial changes the frequency in increments of 1 or 10 Hz. q Push [TS] one or more times until the programmable tuning step indicator “” disappears. w Push [TS] for 1 sec.

• Page 22: Receive And Transmit

  RECEIVE AND TRANSMIT n Mode selection The following modes are available in the IC-718: SSB (LSB/USB), CW, CW REV (CW reverse), RTTY, RTTY REV (RTTY reverse) and AM.  Push [MODE] one or more times to select desired operation mode.

• Page 23: Function For Receive

  n Function for receive ï IF shift function The IF shift function electronically narrows the passband frequency of the IF (intermediate frequency) and cuts out higher or lower frequency components of the IF to reject interference. The function shifts the IF frequency up to ±1.2 KHz in SSB/CW/RTTY modes and up ±250 Hz in CW-narrow/RTTY narrow modes.

• Page 24: Noise Blanker

  RECEIVE AND TRANSMIT ï Attenuator The attenuator prevents desired signals from distorting when very strong signals are near the desired frequency or when very strong electric fields, such as from broadcasting stations, are near your location.  Push [ATT] to toggle the 20 dB attenuator function ON and OFF.

• Page 25: Dsp Function (Option)

  n DSP function (Requires an optional UT-106 ï NR (Noise reduction) function When an optional UT-106 is installed (DSP appears in the function display), noise reduction function can be used. The noise reduction function reduces noise components and picks out desired signals which are buried in noise.

• Page 26: Filter Selection

  RECEIVE AND TRANSMIT n Filter selection The filter selection switches the IF passband width as shown in the table at right. The filter selection is automatically memorized in each mode. q Select the desired mode with the mode switches. w Push [FIL] one or more times to select the desired filter combination.

• Page 27: Filter Setting

  n Filter setting When an optional filter is installed, set the optional filters in initial set mode. Optional filters are not selected by default. (p. 47) D Optional filter setting q While pushing and holding [SET], push [POWER] to enter initial set mode. w Push [UP Y] or [Z DN] one or more times until “FIL”…

• Page 28: Function For Transmit

  RECEIVE AND TRANSMIT n Function for transmit ï Output power and microphone gain • Setting output power q Push [SET] for 1 sec. to select quick set mode. w Push [∫ UP]/[√ DN] one or more times to select “RF Power”. e Rotate the main dial to select the desired output.

• Page 29: Vox Operation

  ï Microphone compressor IC-718 has a built-in, low distortion Mic compressor circuit. This circuit increases your average talk power in SSB mode and is especially useful for DX’ing when the receiving station is having difficulty copying your signal. q Selecting USB or LSB mode.

• Page 30
  RECEIVE AND TRANSMIT ï Optional AT-180 The AT-180 automatic antenna tuner matches the IC-718 to the connected antenna automatically. Once the tuner matches an antenna, the variable capacitor angles are memorized as a preset point for each frequency range (100 kHz steps). Therefore, when you change the frequency range, the variable capacitors are automatically preset to the memorized point.
• Page 31
  • MANUAL TUNING q Set the desired frequency in an HF band. • The IC-718 will not transmit outside of the ham bands, the AH-4 tuner will tune all frequencies 3.5 to 30 MHz. w Push and hold [TUNER] for 1 sec.

• Page 32: Split Frequency Operation

  To exchange the transmit and receive frequencies, n SWR The IC-718 has a built-in circuit of measuring antenna SWR—no external equipment or special adjustments are necessary. ï Measuring SWR q Confirm that the output power is over 30 W.

• Page 33: Function For Cw

  n Function for CW ï Connection for CW 9 10 11 12 1 2 3 4 [ELEC KEY] For no break-in operation: Connect an external switch such as [ACC] a foot switch; or use the RTTY SEND terminal for all bands. 9 10 11 (See p.

• Page 34: Electronic Cw Keyer

  Push [MODE] for 1 sec. to toggle between CW and CW-R modes. ï Electronic CW keyer The IC-718 has an electronic keyer. Both keying speed and weight (the ratio of dot : space : dash) can be set in quick set mode.

• Page 35: Function For Rtty

  n Function for RTTY ï Connection for RTTY(FSK) Rear panel Rear panel view SQL* 9 10 11 12 AF out SEND 5 6 7 8 1 2 3 4 FSKK ï Connection for AFSK [MIC] connector (Front panel view) [ACC] connector Rear panel view SQL*…

• Page 36
  RECEIVE AND TRANSMIT ï RTTY (FSK) operation q Connect a terminal unit as at p. 34. w Select RTTY (or RTTY-R) mode with [MODE]. e Select the desired FSK tone and shift frequencies as below. r Set the desired frequency with the main dial. t Operate the connected PC or TNC (TU).

• Page 37: Memory Operation

  n Memory channels The transceiver has 101 memory channels. The memory mode is very useful for quickly changing to often-used frequencies. MEMORY MEMORY CHANNEL CHANNEL NUMBER Regular memory 1–99 channels Scan edge memory P1, P2 channels n Memory channel selection D Using the [UP Y] or [Z DN] keys q Push [V/M] to select memory mode.

• Page 38: Memory Channel Programming

  MEMORY OPERATION n Memory channel programming Memory channel programming can be performed either in VFO mode or in memory mode. D Programming in VFO mode q Set the desired frequency and operating mode in VFO mode. w Push [CH], then push [UP Y] or [Z DN] several times to select the desired memory channel.

• Page 39: Frequency Transferring

  n Frequency transferring The frequency and operating mode in a memory channel can be transferred to the VFO. D Transferring in VFO mode This is useful for transferring programmed contents to VFO. q Select VFO mode with [V/M]. w Push [CH], then select the memory channel to be transferred with [UP Y] or [Z DN].

• Page 40: Memory Clearing

  MEMORY OPERATION D Transferring in memory mode This is useful for transferring frequency and operating mode while operating in memory mode. When you have changed the frequency or operating mode in the selected memory channel: • Displayed frequency and mode are transferred. •…

• Page 41: Scans

  n Scan types PROGRAMMED SCAN Repeatedly scans between two scan edge frequencies (scan edge memory channels P1 and P2). Scan edge P1 or P2 Scan Jump This scan operates in VFO mode. n Preparation • Channels For programmed scan/auto memory write scan: Program scan edge frequencies into scan edge memory channels P1 and P2.

• Page 42: Programmed Scan Operation

  SCANS n Programmed scan operation q Select VFO mode with [V/M]. w Select the desired operating mode. • The operating mode can also be changed while scanning. e Set [RF/SQL] open or closed. • See previous page for scan condition. •…

• Page 43: Set Mode

  General Set mode is used for programming infrequently changed values or conditions of functions. The IC-718 has 2 separate set modes: quick set mode and initial set mode. D Quick set mode operation q While power is ON, push [SET] for 1 sec.

• Page 44: Quick Set Mode Items

  SET MODE n Quick set mode items • RF power This item adjusts the RF output power. The RF output power can be adjusted from L, 1 to 99 and H for indication, however, it can be adjusted continuously. •The default is H (maximum power). Note that while adjusting the output power, the power meter is displayed automatically.

• Page 45
  SET MODE • BK-IN delay This item adjusts break-in delay time for CW semi break-in operation. The delay time is selectable from 2.0 to 13 (dots). The default is 7. • Key speed This item adjusts the CW key speed. The key speed can be selected from 6 to 60* wpm.

• Page 46: Initial Set Mode Items

  SET MODE n Initial set mode items • Mode select This item is available in all modes, and allows you to simplify operation by inhibiting the selection of unneeded operating modes during normal operation. For example if you are operating mobile and only plan on using LSB and USB modes, use “MODE SELECTION”…

• Page 47
  • Meter peak hold This item selects meter peak hold function on or off. The default is on. • Scan speed This item sets the rate at which channels or frequencies are scanned during scan operations. High or Low can be selected.
• Page 48
  SET MODE • Tuner type This item selects optional antenna tuner type.Three selections are available. • no : No optional tuner connected. • 4 : The optional AH-4 antenna tuner is connected. • 18 : The optional AT-180 antenna tuner is connected The default is no.
• Page 49
  When 2 or more IC-718s are connected to an optional CT-17 CI-V , rotate the main dial to select LEVEL CONVERTER a different address for each IC-718 in the range 01H to 7FH. The default is 5E. • CI-V Transceive Transceive operation is possible with the IC-718 connected to other Icom HF transceivers or receivers.

• Page 50: Installation And Connections

  CAUTION: DISCONNECT the DC power cable from the IC-718 before performing any work on the transceiver. Otherwise, there is danger of electric shock and/or equipment damage. q R e m o v e t h e 5 s c r e w s f r o m t h e t o p o f t h e transceiver and 4 screws from the sides, then lift up the top cover.

• Page 51: Cr-338 High Stability Crystal Unit

  n CR-338 high stability crystal unit By installing the CR-338, the total frequency stability of the receiver will be improved. q Remove the bottom cover as shown in the diagram before. w Disconnect W2 from J4401 (MAIN unit) and W3 from J4201 (MAIN unit).

• Page 52: Dsp Receive Unit

  Return the bottom cover to its original position. n Optional IF filters Several IF filters are available for the IC-718. You can install 1 filter for 455 kHz IF. Choose the appropriate filter for your operating needs. (pgs, 24−25) D Installation q Remove the bottom cover as shown on the p.

• Page 53: At-180 Internal Switch Description

  � AT-180 internal switch description The optional AT-180 has 3 operating conditions for HF band operation. Select a suitable condition according to your antenna system. qRemove the top cover of the AT-180. wSet the tuner switches to the desired positions according to the table below.

• Page 54: Maintenance

  • The internal CPU has mulfunctioned. If you are not able to locate the cause of a problem or solve it through the use of this chart, contact your nearest Icom Dealer or Service Center. POSSIBLE CAUSE control is set too high.

• Page 55: Fuse Replacement

  CIRCUITRY FUSE REPLACEMENT The 13.8 V DC from the DC power cable is applied to all units in the IC-718 through the circuitry fuse. This fuse is installed in the MAIN unit. q Remove the top cover as shown on p. 48 w Replace the circuitry fuse as shown in the diagram at right.

• Page 56: Specifications

  SPECIFICATIONS D General • Frequency coverage : Receive 0.03–29.999999 MHz* Transmit 1.800– 1.999999 MHz* 3.500– 3.999999 MHz* 7.000– 7.300000 MHz 10.100–10.150000 MH 14.000–14.350000 MHz 18.068–18.168000 MHz 21.000–21.450000 MHz 24.890–24.990000 MHz 28.000–29.700000 MHz Guaranteed range: 0.5–29.999999 MHz Varies according to version •…

• Page 57: Options

  IC-PW1 HF + 50 MHz 1 KW LINER AMPLIFIER AH-4 HF + 50 MHz AUTOMATIC ANTENNA TUNER Specially designed to tune a long wire antenna for portable or mobile HF operation. The PTT tuner start function provides simple operation. • Input power rating: 120 W SM-8 DESKTOP MICROPHONE I n c l u d i n g 2 c o n n e c t i o n c a b l e s for simultaneous connection of 2…

• Page 58
  OPTIONS SP-7 EXTERNAL SPEAKER Compact speaker for base station operation. Height can be adjusted for your convenience. UT-102 VOICE SYNTHESIZER Announces the receive frequency, mode, S-meter level and current time in a clear, electronically-generated voice, in English (or Japanese). IC-MB5 MOBILE MOUNTING BRACKET Transceiver mounting bracket for mobile operation.

• Page 59: Control Command

  RS-232C port. The Icom Communications Interface-V (CI-V) controls the following functions of the transceiver. Up to 4 Icom CI-V transceivers or receivers can be connected to a personal computer equipped with an RS-232C port. See p. 32 for setting the CI-V condition using set mode.

• Page 60
  CONTROL COMMAND • Command table Command Sub command — Send frequency data — Send mode data — Read Upper/Lower frequencies — Read frequencies — Read operating mode — Set operating frequency — Set mode — Set VFO Set VFO A Set VFO B VFO A=B VFO A �…

• Page 61: Internal Views

  n Top view Drive ID adj. (R 21) Final ID adj. (R 24) Final amplifier (2SC2094x2) Fuse (FGB 4 A) PA unit R 25 n Bottom view MAIN unit Reference freq. adj. (C 16) Optional crystal (CR-338) PLL unit INTERNAL VIEW Caution: The transceiver has been thoroughly tested and…

• Page 62: Installation Notes

  Similarly some types of transmitter, SSB, CW, AM, etc. have a lower ‘average’ output power and the perceived risk is even lower. Versions of the IC-718 which display the “CE” symbol on the serial number seal, comply with the essential requirements of the European Radio and Telecommunication Terminal Directive 1999/5/EC.

• Page 63: Declaration Of Conformity

  We Icom Inc. Japan 1-1-32, Kamiminami, Hirano-ku Osaka 547-0003, Japan Declare on our sole responsibility that this equipment complies with the essential requirements of the Radio and Telecommunications Terminal Equipment Directive, 1999/5/EC, and that any applicable Essential Test Suite measurements have been performed.

• Page 64
  (Italy) IC-718 #05 < Intended Country of Use > (France) IC-718 #06 < Intended Country of Use > (Spain) A-5649D-1EX-y Printed in Japan © 2000–2007 Icom Inc. Printed on recycle paper with soy ink. 1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan…