Icom IC-7400 Service Manual
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Icom IC-7400 Service Manual

Hf/vhf transceiver
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SERVICE
MANUAL
HF/VHF TRANSCEIVER
i7400

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Summary of Contents for Icom IC-7400

  • Page 1 SERVICE MANUAL HF/VHF TRANSCEIVER i7400...
  • Page 2 1110003870 S.IC NJM2058M-T1 IC-7400 MAIN UNIT 5 pieces 6. DO NOT transmit power into a signal generator or a BiH M3 × 8 ZK IC-7400 8810005770 Screw Top cover 10 pieces sweep generator. Addresses are provided on the inside back cover for your 7.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY AND OPTION INSTALLATIONS SECTION 4 CIRCUIT DESCRIPTION 4 - 1 RECEIVER CIRCUITS ............4 - 1 4 - 2 TRANSMITTER CIRCUITS .

  • Page 4: Specifications

    SECTION 1 SPECIFICATIONS I GENERAL I RECEIVER • Frequency coverage: • Receive system : Triple-conversion superheterodyne Receive 0.030– 60.000 MHz* • Intermediate frequencies: 108.000–174.000 MHz* 1st IF freq. 64.455 MHz Transmit 1.800– 1.999 MHz* 3.500– 3.999 MHz* 2nd IF freq. 455 kHz 7.000–...

  • Page 5: Inside Views

    SECTION 2 INSIDE VIEWS • MAIN AND RF UNITS * Located under side of the point 2 - 1...
  • Page 6 • PA AND CTRL UNITS 2 - 2...

  • Page 7: Disassembly And Option Installations

    SECTION 3 DISASSEMBLY AND OPTION INSTALLATIONS • Opening the transceiver’s case Follow the case and cover opening procedures shown here when you want to install an optional unit or adjust the internal units, etc. CAUTION: DISCONNECT the DC power cable from the transceiver before performing any work on the transceiver.
  • Page 8 • CR-338 HIGH STABILITY CRYSTAL UNIT By installing the CR-338, the total frequency stability of the transceiver will be improved. Shield cover q Remove the bottom cover as shown on the previous page. Earth spring w Remove the 4 screws from the shield cover of the RF unit, (CHASSIS) and disconnect P2 (CHASSIS) from J761 (MAIN unit), then lift up the shield cover.

  • Page 9: Circuit Description

    SECTION 4 CIRCUIT DESCRIPTION • Used RF filter 4-1 RECEIVER CIRCUITS Frequency Control Input 4-1-1 RF SWITCHING CIRCUIT Filter component range signal diode (CTRL, RF AND PA UNITS) 0.03–1.6 MHz L11, L12, R11–R13, C12–C14, C17 The RF switching circuit leads receive signals to bandpass 1.6–2 MHz L21–L23, C21–C25 filters from an antenna connector while receiving.
  • Page 10 4-1-4 1ST MIXER AND 1ST IF CIRCUITS (RF UNIT) (Q204, Q205). The DC amplifiers function as an AGC circuit to reduce average noise. Therefore, the noise blanker func- The 1st mixer circuit mixes the received signals with the 1st tion shuts off pulse-type noise only. LO signal to convert the received signals into a fixed 64.455 MHz 1st IF signal.
  • Page 11 4-1-10 TWIN PBT CIRCUIT (DSP UNIT) 4-1-13 AF AMPLIFIER CIRCUIT (MAIN UNIT) General PBT (Passband Tuning) circuit shifts the center fre- The AF amplifier amplifies the audio signals to a suitable dri- quency of IF signal to electronically narrow the passband ving level for the speaker.

  • Page 12: Transmitter Circuits

    4-2 TRANSMITTER CIRCUITS The modulated IF signal from the DSP IC is applied to the D/A converter section in the CODEC IC (IC501) to convert 4-2-1 MICROPHONE AMPLIFIER CIRCUIT into the analog IF signal. Also the signal is level-shifted 3.3 (MAIN UNIT) V to 5V at the level converter section in the IC (IC501).
  • Page 13 The operating (transmitting) frequency is produced at the 1st When the FOR or VFOR signal exceeds the POCV voltage, IF mixer circuit (RF unit; D271) by mixing the 1st IF and 1st ALC bias voltage from the comparator controls the IF ampli- LO signals.

  • Page 14: Pll Circuits

    4-2-9 TEMPERATURE PROTECTION CIRCUIT 4-3-2 1ST LO PLL CIRCUIT (RF UNIT) (MAIN AND RF UNITS) The 1st LO PLL contains a main and reference loop as a dual loop system. The cooling fan (CHASSIS; MF1) is activated while transmit- ting or when the temperature of the power amplifier exceeds The reference loop generates an approximate 10.8 MHz fre- the preset value.

  • Page 15: Antenna Tuner Circuits

    4-3-4 3RD LO CIRCUIT (RF UNIT) 4-4-2 DETECTOR CIRCUITS (CTRL UNIT) The DDS IC (IC1601) generates a 10-bit digital signal using (1) SWR detector the 32 MHz system clock. The digital signal is converted into Forward and reflected power are picked up by a current an analog wave signal at the D/A converter (R1601–R1620).

  • Page 16: Power Supply Circuits

    (1) CPU and EEPROM (CTRL unit) 4-5 POWER SUPPLY CIRCUITS The antenna tuner CPU (IC5) controls the tuning motors via 4-5-1 PA UNIT the motor driver circuit (Q211–Q218) and tuning relays di- Line Description rectly, and memorizes the best preset position in 100 kHz The voltage from an external power supply via steps.

  • Page 17: Adjustment Procedures

    SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION BEFORE SERVICING I REQUIRED TEST EQUIPMENT EQUIPMENT GREDE AND RANGE EQUIPMENT GREDE AND RENGE Output voltage : 13.8 V DC Frequency range : 300–3000 Hz DC power supply Audio generator Current capacity : 30 A or more Measuring range : 1–500 mV Measuring range...

  • Page 18: Pll Adjustments

    5-2 PLL ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST • Displayed freq. : Any Connect an RF volt- Maximum level L1903, REFERENCE FREQUENCY • Preset R1032 (RF unit) to the cen- meter to the check (0 dB or more) L1904, ter position.
  • Page 19 R1032 Reference frequency adjustment P1901 Reference frequency check point CP1500 1st LO outoput level check point CP1601 L1904 Reference 3rd LO output level L1901 frequency check point L1902 adjustment L1903 C1268 VCO lock C1248 voltage C1228 adjustment C1208 CP1801 (LV2) VCO lock voltage check point C1303...

  • Page 20: Transmitter Adjustments

    5-3 TRANSMITTER ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST • Displayed freq. : 14.100000 MHz Connect an ammeter +2.5 A IDLING CURRENT • Mode : USB between the power (for driver) • [MIC GAIN] : Max.CCW supply and the IC- •...
  • Page 21 L251 C202 Idling current adjustment TX peak adjustment for HF/50 MHz bands final amplifier R204 Idling current adjustment for 144 MHz band Idling current adjustment final amplifier for driver J151 TX peak check point L330 L271 TX peak adjustment L251 TX peak adjustment L252...
  • Page 22 TRANSMITTER ADJUSTMENTS—continued ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST • Displayed freq. : 14.10000 MHz Rear Connect 100 W MAIN R306 HF BANDS OUTPUT • Mode : RTTY panel power meter POWER • [RF POWER] : Max. CW [ANT1] connector.
  • Page 23 R306 HF bands output power adjustment R311 L251 Residual AM 50 MHz band output power adjustment L252 adjustment R317 144 MHz band output power adjustment R320 AM carrier power adjustment SWR detector adjustment SWR detector check point CP1 (SETI) SWR detector pre-setting 5 - 7...

  • Page 24: Receiver Adjustments

    5-4 RECEIVER ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST • Displayed freq. : 14.100000 MHz Rear Connect an AC milli- Maximum audio output L252, RX PEAK • Mode : USB panel volt meter to [EXT level L251, •...
  • Page 25 L201 L202 Noise blanker adjustment L241 L203 L242 R200 RX peak L252 adjustment L251 R1469 R218 Receiver total gain adjustment L215 RX peak pre-setting 5 - 9...

  • Page 26: Adjustment Mode

    5-5 ADJUSTMENT MODE ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION ENTERING • Enter the adjustment mode: Push [F1 ( )] or [F2 ( )] to select D163E 0.70-0 q Turn power OFF. ADJUSTMENT each adjustment mode. 1.40-0 MODE w Terminate the [REMOTE] jack Once enterring adjustment mode, with a 3.5(d) mm mini-plug.
  • Page 27 ADJUSTMENT MODE—continued ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION Push [F5 ( )] to set and to step ADJUSTMENT next. chk SET DRIVE HF/50M Push [F5 ( )] to set and to step next. chk SET DRIVE 144M Push [F5 ( )] to set and to step next.
  • Page 28 ADJUSTMENT MODE—continued ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION • Connect an SSG to [ANT 144M] Push [[F5 ( )] to tune the “BPF- Tuned BPF-1 ADJUSTMENT connector and set as: 1”, and to step next. chk SET Frequency : 108.021500 MHz Level : 3.2 µV (–97 dBm) Modulation...

  • Page 29: Parts List

    SECTION 6 PARTS LIST [FRONT UNIT] [S-LOGIC BOARD] ORDER ORDER DESCRIPTION DESCRIPTION 8900009270 CABLE OPC-912 (P=1 N=22 L=70) R113 7030003580 S.RESISTOR ERJ3GEYJ 153 V (15 kΩ) 8900009310 CABLE OPC-916 (P=1 N=22 L=120) R301 7030003540 S.RESISTOR ERJ3GEYJ 682 V (6.8 kΩ) 8900009270 CABLE OPC-912 (P=1 N=22 L=70) R302...

  • Page 30: Ten-Key Board

    [PHONE BOARD] [TEN-KEY BOARD] ORDER ORDER DESCRIPTION DESCRIPTION 6200003950 S.COIL HF50ACC 322513-T 7030003540 S.RESISTOR ERJ3GEYJ 682 V (6.8 kΩ) 6200003950 S.COIL HF50ACC 322513-T 7030003540 S.RESISTOR ERJ3GEYJ 682 V (6.8 kΩ) 7030003540 S.RESISTOR ERJ3GEYJ 682 V (6.8 kΩ) 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) ERJ12YJ181U (180 Ω) 7030006240 S.RESISTOR 7030003480 S.RESISTOR...
  • Page 31 [DISPLAY BOARD] [DISPLAY BOARD] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 150 V (15 Ω) IC1001 1140010370 S.IC HD6433833SD85H (SX-2494C) R1035 7030003220 S.RESISTOR IC1002 1130007810 S.IC BU4051BCF-T1 R1036 7030003810 S.RESISTOR ERJ3GEYJ 125 V (1.2 MΩ) IC1003 1130006910 S.IC TC7W74F (TE12L) R1037 7030003840 S.RESISTOR ERJ3GEYJ 225 V (2.2 MΩ) IC1004 1130007040 S.IC TC7W32F (TE12L)
  • Page 32 [DISPLAY BOARD] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C554 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A IC151 1110001890 S.IC µPC1678G-E2 C555 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A IC161 1110004100 S.IC TA4001F (TE85L) C556 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A IC191 1110003970 S.IC µPC1658G-E1 C557 4030006880 S.CERAMIC...
  • Page 33 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1750000850 S.DIODE MMBV3700LT1 FI231 2010002470 XTAL FL-315 (64.45500 MHz) 1790000620 S.DIODE MA77 (TX) FI1101 2020001690 S.CERAMIC CFEC10.8MD11 1750000850 S.DIODE MMBV3700LT1 1790000620 S.DIODE MA77 (TX) 1750000850 S.DIODE MMBV3700LT1 X1901 6050007351 XTAL CR-337A (32.000 MHz) 1790000620 S.DIODE MA77 (TX) 1750000850 S.DIODE...
  • Page 34 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 391 V (390 Ω) L262 6140003530 COIL LR-395 7030003390 S.RESISTOR ERJ3GEYJ 560 V (56 Ω) L263 6200003040 S.COIL NL 322522T-R68J-3 7030003290 S.RESISTOR ERJ3GEYJ 100 V (10 Ω) L271 6200005190 S.COIL MLF1608D R56K-T 7030003200 S.RESISTOR ERJ12YJ471U (470 Ω) L272...
  • Page 35 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R254 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) R541 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) R255 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) R542 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) ERJ3GEYJ 271 V (270 Ω) R261 7030003370 S.RESISTOR...
  • Page 36 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 221 V (220 Ω) R1151 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) R1632 7030003360 S.RESISTOR R1152 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) R1802 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) ERJ3GEYJ 471 V (470 Ω) R1153 7030003440 S.RESISTOR...
  • Page 37 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030011330 S.CERAMIC C1608 CH 1H 391J-T-A C219 4030009530 S.CERAMIC C1608 CH 1H 030B-T-A 4030007110 S.CERAMIC C1608 CH 1H 680J-T-A C220 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A 4030011330 S.CERAMIC C1608 CH 1H 391J-T-A C221 4030011600 S.CERAMIC C1608 JB 1E 104K-T-N...
  • Page 38 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C325 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C1121 4550006250 S.TANTALUM TEMSVA 1A 106M-8L C326 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C1122 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A C327 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C1131 4030011600 S.CERAMIC C1608 JB 1E 104K-T-N...
  • Page 39 [RF UNIT] [RF UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C1502 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A C1931 4030011600 S.CERAMIC C1608 JB 1E 104K-T-N C1503 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A C2004 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C1520 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C2005 4510004630 S.ELECTROLYTIC ECEV1CA100SR C1521 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A...

  • Page 40: Main Unit

    [RF UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION EP242 6910012350 S.BEAD MMZ1608Y 102BT Q302 1590000680 S.TRANSISTOR DTC114EUA T106 EP261 6910000630 BEAD FSOH070RN Q303 1510000510 S.TRANSISTOR 2SA1576A T106R EP301 6910012350 S.BEAD MMZ1608Y 102BT Q304 1590000680 S.TRANSISTOR DTC114EUA T106 EP302 6910012350 S.BEAD MMZ1608Y 102BT Q305 1590002150 S.TRANSISTOR...
  • Page 41 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION D1840 1750000370 S.DIODE DA221 TL L2020 6200001720 S.COIL NL 322522T-1R0J D1841 1750000370 S.DIODE DA221 TL L2060 6200001830 S.COIL NL 322522T-100J D1880 1750000370 S.DIODE DA221 TL L2061 6200001720 S.COIL NL 322522T-1R0J D1881 1750000370 S.DIODE DA221 TL D1900 1790001670 S.DIODE RB706F-40T106...
  • Page 42 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R323 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) R560 7030003800 S.RESISTOR ERJ3GEYJ 105 V (1 MΩ) R324 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) R561 7510000771 S.THERMISTOR NTCCM2012 3SH 223KC-T R326 7030009720 S.RESISTOR ERJ12YJ102U (1 kΩ) R562 7510000771 S.THERMISTOR...
  • Page 43 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R1126 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) R1466 7510001110 S.THERMISTOR NTCCM1608 4BH 153KC R1140 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) R1467 7030008061 S.RESISTOR ERA3YED 222V R1141 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) R1468 7030008061 S.RESISTOR ERA3YED 222V ERJ3GEYJ 101 V (100 Ω)
  • Page 44 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R1906 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) C146 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A R1907 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) C147 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A R1908 7030003600 S.RESISTOR ERJ3GEYJ 223 V (22 kΩ) C148 4030006880 S.CERAMIC...
  • Page 45 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C450 4030012610 S.CERAMIC C2012 JB 1C 474K-T-A C1185 4030006870 S.CERAMIC C1608 JB 1H 222K-T-A C451 4030012610 S.CERAMIC C2012 JB 1C 474K-T-A C1186 4510004630 S.ELECTROLYTIC ECEV1CA100SR C500 4030011600 S.CERAMIC C1608 JB 1E 104K-T-N C1187 4510004630 S.ELECTROLYTIC ECEV1CA100SR C501...
  • Page 46 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C1505 4030006900 S.CERAMIC C1608 JB 1H 103K-T-A J160 6510022590 S.CONNECTOR 22FMN-BMTTR-A-TBT C1506 4030007020 S.CERAMIC C1608 CH 1H 120J-T-A J180 6510022590 S.CONNECTOR 22FMN-BMTTR-A-TBT C1507 4510004630 S.ELECTROLYTIC ECEV1CA100SR J250 6510007020 CONNECTOR TMP-J01X-V6 C1508 4030007020 S.CERAMIC C1608 CH 1H 120J-T-A J400 6510018960 S.CONNECTOR...

  • Page 47: Pa Unit

    [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1180000420 S.IC TA78L05F (TE12R) L519 6200003260 S.COIL NL 322522T-101J 1110002020 IC TA7805S L521 6200001830 S.COIL NL 322522T-100J 1110002030 IC TA7808S L522 6200001830 S.COIL NL 322522T-100J IC501 1160000130 S.IC TD62783AF (TP1) L523 6200001830 S.COIL NL 322522T-100J IC502 1130007700 S.IC...
  • Page 48 [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R606 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A MCR10EZHJ 56 Ω (560) R614 7030000230 S.RESISTOR 4030011240 S.CERAMIC GRM42-6 CH 470J 500PT MCR10EZHJ 56 Ω (560) R615 7030000230 S.RESISTOR C100 4030011740 S.CERAMIC...

  • Page 49: Drv Board

    [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C544 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A RL514 6330001330 RELAY AG 201344 C545 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A RL601 6330001530 RELAY NR-HD (5V) AE5349 C546 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A C547 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A...

  • Page 50: Varistor-A Board

    [VARISTOR-A BOARD] [TUNER UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1790001760 S.VARISTOR MA30-(TX) 1590000680 S.TRANSISTOR DTC114EUA T106 1590000680 S.TRANSISTOR DTC114EUA T106 1590000680 S.TRANSISTOR DTC114EUA T106 6910012350 S.BEAD MMZ1608Y 102BT 1590000680 S.TRANSISTOR DTC114EUA T106 0910054330 PCB B 5718 1590000680 S.TRANSISTOR DTC114EUA T106 1590000680 S.TRANSISTOR DTC114EUA T106 1590000680 S.TRANSISTOR DTC114EUA T106...
  • Page 51 [TUNER UNIT] [CTRL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A 1110000960 S.IC NJM4558M-T1 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A 1120002250 S.IC TC74ACT32F 4030006880 S.CERAMIC C1608 JB 1H 472K-T-A 1120002240 S.IC TC74AC112F 4010008550 CERAMIC DE0607 SL 390J 3KV 1110000960 S.IC NJM4558M-T1 4010008550 CERAMIC...
  • Page 52 [CTRL UNIT] [CTRL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION MCR50JZHJ 18 Ω (180) 7030001040 S.RESISTOR R112 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) MCR50JZHJ 18 Ω (180) 7030001040 S.RESISTOR R113 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) R114 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ)

  • Page 53: Filter Board

    [CTRL UNIT] [CTRL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030011340 S.CERAMIC C1608 CH 1H 471J-T-A 6910009670 S.CHECK P HK3-S-T 4030011600 S.CERAMIC C1608 JB 1E 104K-T-N 4030011600 S.CERAMIC C1608 JB 1E 104K-T-N 4030009990 S.CERAMIC C1608 CH 1H 200J-T-A 6510007020 CONNECTOR TMP-J01X-V6 4030009990 S.CERAMIC C1608 CH 1H 200J-T-A 6510007020 CONNECTOR TMP-J01X-V6...
  • Page 54 [DSP UNIT (MAIN UNIT EP2)] [DSP UNIT (MAIN UNIT EP2)] ORDER ORDER DESCRIPTION DESCRIPTION 1130010010 S.IC TC7WHU04FU R321 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) ERJ3GEYJ 470 V (47 Ω) 1130010540 S.IC SN74AHC74PWR R322 7030003280 S.RESISTOR 1130010540 S.IC SN74AHC74PWR R323 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) IC51...
  • Page 55 [DSP UNIT (MAIN UNIT EP2)] [DSP UNIT (MAIN UNIT EP2)] ORDER ORDER DESCRIPTION DESCRIPTION C164 4510004630 S.ELECTROLYTIC ECEV1CA100SR 7030003860 S.JUMPER ERJ3GE JPW V C171 4030011600 S.CERAMIC C1608 JB 1E 104K-T-N 7030008240 S.JUMPER ERJ12YJ0R00U C172 4030011600 S.CERAMIC C1608 JB 1E 104K-T-N 7030003860 S.JUMPER ERJ3GE JPW V C173...
  • Page 56 SECTION 7 MECHANICAL PARTS [FRONT UNIT] [MIC BOARD] REF. NO. ORDER NO. DESCRIPTION QTY. REF. NO. ORDER NO. DESCRIPTION QTY. 0880000950 Sensor EX-2500 #01 6510000190 Connector FM214-8SS (P) 6450001230 Plate HLJ0999-01-480 6450001230 Plate HLJ0999-01-480 8210018280 2072 front panel (A)-1 [7400] [PBT BOARD] 8210018270 2072 front panel (B)-1...
  • Page 57 MP13 (C) S-LOGIC UNIT MP26 (F) R1 (LO) DISPLAY BOARD MP3 (LO) R4 (LO) MP2 (C) MP27 (F) MP3 (D) MP2 (D) PHONE BOARD MP1 (D) J1 (PH) MP4 (LO) MP1 (LO) J2 (PH) MIC BOARD MP2 (LO) J1 (MI) DS1002 (D) EP2 (F) EP1 (D)
  • Page 58 MP2 (CT) MAIN and RF units (Top view) MP21 (C) MAIN UNIT MP66 (C) MP19 (C) J700 (M) MP1802 (RF) MP1102 (RF) MP1101 (RF) CTRL UNIT MP1 (CT) MP1801 (RF) MP1302 (RF) MP1602 (RF) MP1303 (RF) MP4 (C) J740 (M) MP1604 (RF) MP67 (C) J760 (M)
  • Page 59 [CHASSIS PARTS] [CHASSIS PARTS] [MAIN UNIT] REF. NO. ORDER NO. DESCRIPTION QTY. REF. NO. ORDER NO. DESCRIPTION QTY. REF. NO. ORDER NO. DESCRIPTION QTY. 6510000370 Connector MR-DS MP75 8930055980 Shield sponge (F) J700 6450001840 Connector TCS7568-43-201 6510000370 Connector MR-DS MP76 8930055980 Shield sponge (F) J740...
  • Page 60 SECTION 8 SEMI-CONDUCTOR INFORMATION • TRANSISTORS AND FET’S • DIODES 2SA1576A T106 R 2SB1201 S 2SC1971 2SC2694 2SC3647 S TD 1SS302 1SS315 1SS319 1SS375-TL 1SS385 (Symbol: FR) (Symbol: B1201) (Symbol: None) (Symbol: None) (Symbol: CC) (Symbol: C3) (Symbol: S2) (Symbol: A4) (Symbol: FH) (Symbol: 09) 2SC4081 T107 R...
  • Page 61 SECTION 9 BOARD LAYOUTS 9-1 S-LOGIC BOARD • TOP VIEW POWER TUNER NR-NOTCH TRANSMIT A/NOTCH AF-RF/SQL MIC GAIN RF PWR CW PITCH KEY SPEED P.AMP/ATT VOX/BK-IN MONITOR CALL LOCK/SPCH 9 - 1...
  • Page 62 • BOTTOM VIEW (S-LOGIC BOARD) J501 PB1A PB1A MCHA MCHB to PBT PB2A PB2B board J1 J303 CFL- to DISPLAY board DS1002 CFL+ J302 to DISPLAY board J1001 PB2B PB2A KIOI TRAK TUNK J301 ANTK to DISPLAY APFK board J1002 DOTK DSHK KYSL...
  • Page 63 9-2 DISPLAY BOARD • TOP VIEW DS1002 to S-LOGIC board J303 9 - 3...
  • Page 64 • BOTTOM VIEW (DISPLAY BOARD) J505 J1001 to MODE to S-LOGIC board J1 board J301 J503 XFCK MPWK MPRK LOCK SPLD FIND to TEN-KEY board J1 J1002 PB2B PB2A KIOI TRAK TUNK ANTK APFK DOTK DSHK KYSL RITL PWRL MIGL APFL to S-LOGIC board J302...
  • Page 65 9-3 TEN-KEY BOARD 9-5 PHONE BOARD 9-6 RIT BOARD • TOP VIEW • TOP VIEW ELEC-KEY PHONES F-INP SPILT PBTC GENE MP-W MP-R M-CL ∆TX CLEAR to S-LOGIC board J507 9-4 MODE BOARD to S-LOGIC board J502 • TOP VIEW 9-7 PBT BOARD M-CH to S-LOGIC...
  • Page 66 • BOTTOM VIEW (PHONE BOARD) • BOTTOM VIEW (TEN-KEY BOARD) XFCK MPWK MPRK LOCD SPLD FIND to DISPLAY board J503 9-8 MIC BOARD • BOTTOM VIEW (MODE BOARD) to S-LOGIC board J508 to DISPLAY board J505 9 - 6...
  • Page 67 9-9 MAIN UNIT J140 • TOP VIEW CIKY CIST CANT CDRS CREF CFOR to CTRL C-8V unit J7 J741 CT8V C14V C14V C14V to CTRL J1000 unit J13 DRQW DWBY DDTW J1001 DRQR DDTR DTIF DRBY DSTR to DSP unit J902 DRAF CTFL NSQL...
  • Page 68 • BOTTOM VIEW (MAIN UNIT) 9 - 8...
  • Page 69 9-10 DSP UNIT • TOP VIEW 9 - 9...
  • Page 70 • BOTTOM VIEW (DSP UNIT) MAIN unit J1001 J901 J902 MAIN unit J1000 DRIF DSPI1 DRES GND1 DRES KEYIN UNLK DSKY DSST DTAF DSPI2 GND1 GND1 OUT7 OUT8 OUT5 OUT6 VSQL DCBY OUT3 OUT4 TOFF RTDT MONI DAGC AGC2 AGC1 OUT1 OUT2 CTFL...
  • Page 71 9-11 RF UNIT • TOP VIEW J1001 J1601 to MAIN to MAIN unit J160 to MAIN unit J100 unit J400 P261 to MAIN unit J250 W254 from CTRL unit J2 from PA unit J1 P601 from PA unit J601 9 - 11...
  • Page 72 • BOTTOM VIEW (RF UNIT) 9 - 12...
  • Page 73 9-12 CTRL UNIT • TOP VIEW to TUNER unit J5 PAFE PAFE TUIN from TUNER unit J3 to CHASSIS to MAIN to RF unit J1 unit J741 T14V to TUNER unit MF2 T14V to TUNER unit MF1 C14V C14V C14V CT8V SETI C-8V...
  • Page 74 • BOTTOM VIEW (CTRL UNIT) 9 - 14...
  • Page 75 9-13 TUNER UNIT • TOP VIEW to CTRL unit J8 TUIN to CTRL unit J3 TUOT to CTRL unit J4 9 - 15...
  • Page 76 • BOTTOM VIEW (TUNER UNIT) 9 - 16...
  • Page 77 9-14 PA UNIT • TOP VIEW J202 to FILTER J201 unit EP5 V-B2 to VARISTOR-C to VARISTOR-D P601 board V-B1 board to RF unit J121 PPWS PDRS PFSB PMDT PMCK PH5V THML PT8V PVRF PVFR PGND PICL PICH P14A P14A P14V P14V P14V...
  • Page 78 • BOTTOM VIEW (PA UNIT) 9 - 18...
  • Page 79 9-15 FILTER UNIT 9-17 VARISTOR-A BOARD 9-19 VARISTOR-C BOARD • TOP VIEW • TOP VIEW • TOP VIEW to PA unit EP6 to CHASSIS P1 V-A2 V-B2 V-A1 V-B1 CHASSIS to PA unit EP7 9-16 DRV BOARD 9-18 VARISTOR-B BOARD 9-20 VARISTOR-D BOARD •...
  • Page 80 • BOTTOM VIEW (VARSTOR-C BOARD) • BOTTOM VIEW (VARSTOR-A BOARD) • BOTTOM VIEW (FILTER UNIT) • BOTTOM VIEW (VARSTOR-D BOARD) • BOTTOM VIEW (VARSTOR-B BOARD) • BOTTOM VIEW (DRV BOARD) 9 - 20...

  • Page 81: Block Diagram

    SECTION 10 BLOCK DIAGRAM • BLOCK (1) IC1460 IC1460 FI272 FI271 Q250 D252 1SV308 BA15532F BA15532F IC280 CFWM455D CFWM455D 3SK131 D253 1SV308 TC4W53F DRIF NB GATE IC501 (20K BW) (20K BW) AK4528VF IC1120 IC1120 IC1120 FI381 Q330 µPC4574G2 µPC4574G2 µPC4574G2 TC7WHU04FU IC400 CFWM455D...
  • Page 82 • BLOCK (2) Q231 Q211/Q212 Q181/Q182 ANT2 ANT1 COMMON LINE 2SK2171 2SK1740 2SK2171 0.03- LINE 1.6MHz Q241 3SK131 D261 RX LINE HSB88WS TX LINE CANT 1.6- 2.0MHz DATA BUS LINE FI231B FI231A FL315 FL-315 PRE1 ATTC XTAL XTAL IC151 D15 HSM88AS CURRENT IC191 2.0-...

  • Page 83: Wiring Diagram

    SECTION 11 WIRING DIAGRAM P14V H14V H14V P14V PGND J121 P601 J601 PGND ANT1 ANT2 FILTER BOARD RF UNIT 144MHz J151 PA UNIT CHASSIS P501 J502 CTIN CTIN J261 J1601 PAFE J1001 TUIN TUIN P261 P1601 TUOT TUOT J400 J250 J120 J160 J100...

  • Page 84: Voltage Diagrams

    SECTION 12 VOLTAGE DIAGRAM 12-1 DSP UNIT DSP UNIT 5.01V 3.36V #01:80ns 2.2µ 2.2µ #02:160ns 1.82V R151 2.6V SN74AHC74PW SN74AHC74PW 4.07V 6.84V #01:40ns #02:80ns 0.0047 L101 L102 7.61V #01:10.4µs 0.4V 2.2µ 2.2µ IC152 IC161 IC171 #02:20.8µs 2.3V IC101 TK11218BM BA033FP TK11250BM SN74HCT244APW C101...

  • Page 85: Front Unit

    12-2 FRONT UNIT J502 CP304 DISPLAY BOARD S-LOGIC BOARD CP303 CP305 DISPLAY BOARD C1007 0.1 IC1003 13.8V 0.1µsec C1008 R1022 R1021 R1020 R1019 CP1050 CP1051 TC7W74F 4.7k 4.7k 4.7k 4.7k J301 J1001 IC1004a CP523 CP521 TC7W32F 0.535V R1123 3.7V W1020 CP522 R1122 FAI1...

  • Page 86: Main Unit (1)

    12-3 MAIN UNIT (1) MAIN UNIT (1) BUS LINE1 C111 0.001 -7.64V 4.99V J100 7.79V EP101 EP102 14VA 14VA 14VA 7.0V 7.6V CP9001 L201 C211 L202 0.0022 R1424 R1425 7.6V 13.6V TX: 7.96V TX: 0.2V 7.8V 4.9V 13.63V -7.64V 13.63V 7.96V LS-450 7.55V...

  • Page 87: Main Unit (2)

    12-4 MAIN UNIT (2) MAIN UNIT (2) BUS LINE1 J761 CP9011 L760 220µ CP9002 START L761 220µ L762 HF70ACC635050-T E14V to CHASSIS L763 HF70ACC635050-T EGND L2061 1µ L2020 1µ _H5VL _H5VL _H5VL _H5VL J760 4.9V [DATA] EP761 R1703 J700 ISTA R1700 _ISTA [REMOTE]...

  • Page 88: Pa Unit, Filter, Drv And Varistor Boards

    12-5 PA UNIT, FILTER, DRV AND VARISTOR BOARDS PA UNIT J502 HPAO P501 FILTER BOARD MEASURMENT CONDITIONS CHASSIS 13.8V CT IN frequency:14.1MHz USB R702 RX(RF: no input) to CTRL L510 LA-551 L509 LA-481 TX(AF: no input) C237 144M TX: 0.68V 50MHz from/to RF 18/21MHz...

  • Page 89: Ctrl And Tuner Units

    12-6 CTRL AND TUNER UNITS TUNER UNIT CTRL UNIT 100µH MP28GA R9 1M T14V T14V Q211 NY-12W-K-IE C1 2p from IC1b 13.6V CTIN DTC114EU 10µH PA unit NJM4558M J502 220k C3 20p Q212 13.6V DTC114EU MEASUREMENT CONDITIONS frequency: 14.1MHz USB T14V T14V RX(RF: no input)

  • Page 90: Rf Unit

    12-7 RF UNIT W251 W254 W256 W255 W257 J262 RF UNIT -7.55V R263 270 R262 18 L288 D272 0.15µH R261 270 W532 W536 D271 1SV271 L272 L290 L289 HSB88WS LS-424 Q271 Q1521 108.00000-174.00000 MHz W533 W537 LR-358 LR-358 C292 56p 7.78V EP1501 EP1502 CP1500...
  • Page 91 Phone : ( 604 ) 952-4266 Fax : ( 604 ) 952-0090 : http://www.icomcanada.com Icom (UK) Ltd. Icom (Australia) Pty. Ltd. Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. A.B.N. 88 006 092 575 Phone : 01227 741741...
  • Page 92 S-13811HZ-C2 © 2002 Icom Inc. 1-1-32, Kamiminami, Hirano-ku Osaka 547-0003, Japan...

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