Icom IC-756proIII Service Manual
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Icom IC-756proIII Service Manual

Icom IC-756proIII Service Manual

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HF/50MHz ALL MODE TRANSCEIVER
iC-756pro
S-14110XZ-C1-q
June. 2007

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  • Page 1 HF/50MHz ALL MODE TRANSCEIVER iC-756pro S-14110XZ-C1-q June. 2007...
  • Page 2 8. READ the instructions of test equipment throughly before connecting a test equipment to the transceiver. Icom, Icom Inc. and logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.

  • Page 3: Table Of Contents

    CONTENTS SECTION SPECIFICATIONS SECTION INSIDE VIEWS SECTION CIRCUIT DESCRIPITON SECTION ADJUSTMENT PROCEDURES SECTION PARTS LIST SECTION MECHANICAL PARTS AND DISASSEMBLY SECTION SEMI-CONDUCTOR INFORMATION SECTION BOARD LAYOUTS MODE, PHONE, KEY, PREAMP, BPF-A, DSP-A BOARDS ......8-1 DISPLAY BOARD .

  • Page 4: Specifications

    SECTION 1 SPECIFICATIONS ■ GENERAL ■ RECEIVER • Frequency coverage: • Receive system : Triple-conversion Receive 0.030–60.000 MHz* superheterodyne system Transmit 1.800–1.999 MHz* 3.500–3.999 MHz* • Intermediate frequencies: 5.3305, 5.3465, 5.3665, 5.3715, 5.4035 MHz* 1st IF 64.455 MHz 7.000–7.300 MHz* 10.100–10.150 MHz* 2nd IF 455 kHz...
  • Page 5 SECTION 2 INSIDE VIEWS 2 - 1...
  • Page 6 2 - 2...

  • Page 7: Receiver Circuit

    3-1-3 PRE-AMPLIFIER CIRCUITS (PRIAMP BOARD) The signals from the CTRL-A unit either bypass or pass The IC-756PROIII has 2 gain levels of pre-amplifi er circuits. through the 6 dB (RF-B unit, R102, R106, R111, RL102) One has 10 dB gain for the 1.8–21 MHz bands and the other and/or 12 dB (RF-B unit, R112, R113, R114, RL103) one has 16 dB gain for the upper 24 MHz bands.
  • Page 8 3-1-5 1ST IF CIRCUIT (RF-B UNIT) Some DC voltage from the noise detector circuit is fed back to the noise amplifiers (Q271, Q272) via the DC amplifiers The 1st IF circuit filters and amplifies the 1st IF signal. The (Q274, Q275). The DC amplifiers function as an AGC cir- 1st IF signal combined at L1018 and is then applied to a cuit to reduce average noise.

  • Page 9: Display Board

    IF signal to electronically narrow the passband 108) and is compared with the threshold level set by the width. The IC-756PROIII uses the DSP circuit for the digital [RF/SQL] control. The [RF/SQL] setting signal is applied to PBT function and actually shifts the both lower and higher the main CPU via the sub CPU (DISPLAY board;...

  • Page 10: Transmitter Circuits

    3-2 TRANSMITTER CIRCUITS (1) When SSB mode The audio signals from the analog switch (IC2201, pin 5) 3-2-1 MICROPHONE AMPLIFIER CIRCUIT are amplified at the limiter amplifier (IC2281b) and applied (MAIN-A UNIT) to the low-pass filter (IC2281c/d) to limit the transmit The microphone amplifier circuit amplifies microphone passband width.
  • Page 11 3-2-4 SPEECH COMPRESSOR CIRCUIT 3-2-6 RF CIRCUIT (RF-B AND PA UNITS) (DSP-A BOARD) The RF circuit amplifies operating (transmitting) frequency to obtain 100 W of RF output. The speech compressor compresses the transmitter audio input signals to increase the average output level (average The signal from the 1st IF mixer (RF-B unit;...

  • Page 12: Pll Circuits

    When the FORV signal exceeds the POCV voltage, ALC The thermistor (R50) detects the temperature of the final bias voltage from the comparator (IC551b) controls the IF amplifier (Q5), and activates Q11 and Q13 to accelerate amplifiers (Q261). This adjusts the output power to a speci- the cooling fan when the detected temperature exceeds fied level from the [RF POWER] control until the FORV and 70˚C (158˚F).
  • Page 13 The divided signal at the DDS circuit (IC101) is used for The detected signal output from the PLL IC (IC381; pin 2) the marker signals with the IC-756PROIII. is converted into a DC voltage (lock voltage) at the loop filter and then fed back to one of the VCO circuits (Q201, The reference signal for the DDS circuit (32.0 MHz) is...

  • Page 14: Antenna Tuner Circuits

    3-4 ANTENNA TUNER CIRCUITS (2) Tuning motors (CTRL-A and TUNER-A units) A motor controller (Q211–Q218, D211, D213, D215, D217) 3-4-1 MATCHING CIRCUIT (TUNER-A UNIT) rotates the tuning motors (TUNER-A unit; MF1, MF2) to The matching circuit is a T-network. Using 2 tuning motors, obtain a low SWR.

  • Page 15: Power Supply Circuits

    3-5 SCOPE CIRCUITS 3-6 POWER SUPPLY CIRCUITS 3-5-1 SCOPE RECEIVER CIRCUIT (RF-B UNIT) 3-6-1 PA UNIT A portion of the 64.455 MHz 1st IF signal from the 1st LINE DESCRIPTION mixer circuit (Q1203–Q1206: while receiving) or IF ampli- The voltage from an external power supply via fier (Q1551: while transmitting) is passed through the the common filter circuit (FILTER-A unit;...

  • Page 16: Logic Circuits

    3-6-3 MAIN-A UNIT 3-7-2 SUB-CPU PORT ALLOCATIONS (DISPLAY BOARD; IC401) LINE DESCRIPTION Port Receive 8 V converted from the 14 V line and Description number name regulated by the R8V regulator circuit (Q601, Input and output ports for the system OSC1, Q602, D601).

  • Page 17: Dsp-A Board

    3-7-3 MAIN-CPU PORT ALLOCATIONS (MAIN-A UNIT; IC3501) Port Port Description Description number name number name A0–A3, CON1 Outputs data signal for the DDS cir- 6–9, Address signal output ports for the A4–A11, (PDAT) cuits (PLL unit; IC101, IC401). 11–18, LCD controller (IC3551). A12–A18 20–26 Outputs clock signal for the DDS cir-...

  • Page 18: Main-A Unit

    3-7-4 INPUT EXPANDER ALLOCATIONS (1) DISPLAY board; IC411 (2) PLL unit; IC101 Port Port Description Description number name number name Input port for the [RIT], [∆TX] and Outputs the marker mute switch [CLEAR] switches. (IC192) control signal. MAKS High : When the marker ON is select- Input port for [UP] and [DN] switches MUDK of the connected microphone.
  • Page 19 (6) RF-B unit; IC402 (4) CTRL-A board; IC11 Port Port Description Description number name number name Outputs a low-pass filter select signal. Outputs a bandpass filter select signal. High : When 0.03–1.999999 MHz High : When 11–13.999999 MHz or B7WS band is selected.

  • Page 20: Main Unit

    (8) MAIN-A unit; IC3653 (10) MAIN unit; IC3752 Port Port Description Description number name number name Outputs strobe signals for the out- Outputs control signal for the noise BSTB put expander ICs (RF-B unit; IC301, blanker switch (Q3751, Q3752). IC302). High : When the [NB] switch is ON, except in FM mode.

  • Page 21: Adjustment Procedure

    SECTION 4 ADJUSTMENT PROCEDURE 4-1 PREPARATION ■ REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output voltage : 13.8 V Frequency range : 300–3000 Hz DC power supply Audio generator Current capacity : 30 A or more Measuring range : 1–500 mV Measuring range...

  • Page 22: Pll Adjustments

    4-2 PLL ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST • Display freq. : Any Connect a frequency 64.000000 MHz (R33 REFERENCE for critical • Turn L52 on the PLL unit to 4 rota- counter to the check FREQUENCY tion downside for presetting.
  • Page 23 PLL ADJUSTMENTS—continued ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST S2LO • Display freq. : Any Connect an RF volt- –3 dBm or more Verify OUTPUT • Receiving meter to the check LEVEL point P901. MARKER • Display freq. : Any Connect an oscil- 4 Vp-p or more...

  • Page 24: Transmitter Adjustments

    4-3 TRANSMITTER ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST IDLING • Connect an RF power meter to [ANT1] connector. CURRENT • Turn R14, R16, R65 and R67 on the PA unit to max. CCW. • Disconnect W16 from EP4, and connect an ammeter between W16(+) and EP4(–). (for drive ampli- Measure the cur- •...
  • Page 25 • PA unit PA unit Idling current adjustment point for drive amplifier Top view of the transceiver Ammeter Idling current adjustment point − for drive amplifier Idling current adjustment point for final amplifier Idling current adjustment point for final amplifier •...
  • Page 26 • Connect CP501 to GND. s u p p l y a n d t h e • Transmitting IC-756PROIII. HF BANDS • Display freq. : 14.100000 MHz Rear C o n n e c t a n R F...
  • Page 27 • MAIN-A unit MAIN-A unit Bottom view of the transceiver R509 50 MHz band output power adjustment CP501 Ic APC check point R510 AM carrier R507 adjustment HF bands output power adjustment R545 Ic APC adjustment • DSP-A board DSP-A board MAIN-A unit R2227...

  • Page 28: Receiver Adjustments

    4-4 RECEIVER ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT JUST RX PEAK • Display freq. : 14.100000 MHz Rear C o n n e c t a n A C Minimum audio output RF-B L1211, • [DUALWATCH] : OFF panel millivoltmeter to [EXT level...
  • Page 29 • RF-B unit RF-B unit L1211 Bottom view of the transceiver L1011 RX peak adjustment C1238 C1036 R1207 L1752 Mixer balance R1206 adjustment L1751 R1007 FM distortion R1006 adjustment L1702 J1651 Mixer ballance check point • MAIN-A unit MAIN-A unit Bottom view of the transceiver L111 L112...
  • Page 30 RECEIVER ADJUSTMENTS—continued ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST RECEIVER • Display freq. : 14.100000 MHz MAIN-A Connect an oscil- 3.7 Vp-p MAIN-A R210 TOTAL GAIN • [DUALWATCH] : OFF loscope to the check • Mode : USB point CP213.
  • Page 31 • MAIN-A unit MAIN-A unit Bottom view of the transceiver L273 Noise L272 blanker L271 adjustment R271 R210 Receiver total gain CP271 adjustment Noise blanker check point CP213 Receiver total gain check point • RF-B unit RF-B unit J2001 Spectrum scope pre-setting Bottom view of the transceiver CP2002...
  • Page 32 4-5 TUNER ADJUSTMENTS ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST • D i s p l ay f r e q . : 29.70000 MHz CTRL-A Connect a digital Minimum voltage CTRL-A DETECTOR • Mode : FM multimeter or oscil- •...
  • Page 33 4-6 METER ADJUSTMENTS ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION ENTERING 1 • Enter the adjustment mode: ADJUST MODE Push [F-1 (METER)], [F-2 (TX)] or [F-3 (RX)] to q Turn power OFF. ADJUSTMENT select each adjustment mode. w Terminate the [REMOTE] jack MODE Once entering adjustment mode, use [F-1 ( ▼...
  • Page 34 METER ADJUSTMENTS–contnued ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPRATION (50M POWER 7 • Connect an RF power meter to Set the output power to using the tuning dial. -- TX -- METER) [ANT1] connector. Then push [F-5 (SET)] to store the "POWER POWER 50M Tuner •...

  • Page 35: Front Unit

    SECTION 5 PARTS LIST [FRONT UNIT] [DISPLAY UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 5080000450 SLU2LC1EX5B-TH D501 1750000190 S.DIO 1SS322 (TE85R) 119.3/19.7 D509 1750000190 S.DIO 1SS322 (TE85R) 62/5.8 D512 1730000410 S.ZEN RD5.1M-T2B2 91.6/39.4 5510000490 ME-41 (KL-293S-11) SX2495 D531 1730002260 S.ZEN MA8030-H (TX) 74.6/33.5 D701 1750000520...
  • Page 36 [DISPLAY UNIT] [DISPLAY UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION R252 7030003440 S.RES ERJ3GEYJ 102 V (1 kΩ) 10.2/61.7 R802 7030003620 S.RES ERJ3GEYJ 333 V (33 kΩ) 104.3/97.6 S.RES MCR10EZHJ 220 Ω (221) R803 7030000300 96.5/99.6 R253 7030003440 S.RES ERJ3GEYJ 102 V (1 kΩ) 7.5/60.7 R254 7030003440...
  • Page 37 [DISPLAY UNIT] [DISPLAY UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C492 4030006880 S.CER C1608 JB 1H 472K-T 90.1/29.2 C1541 4510006650 S.ELE ECEV1EA100SR 111.5/31 C501 4510006650 S.ELE ECEV1EA100SR 119.7/29.9 C1551 4510006650 S.ELE ECEV1EA100SR 127.3/29.9 C502 4030011600 S.CER C1608 JB 1E 104K-T 121.8/26.3 C1552 4510006650...
  • Page 38 [TEN-KEY UNIT] [MODE UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 1590002310 S.TR DTC114EE TL 61.8/50.6 7030003540 S.RES ERJ3GEYJ 682 V (6.8 kΩ) 11.9/94.8 7030003480 S.RES ERJ3GEYJ 222 V (2.2 kΩ) 11.1/85.7 1590002310 S.TR DTC114EE TL 8.3/45.1 1590002310 S.TR DTC114EE TL 13.8/51.8 7030003520 S.RES ERJ3GEYJ 472 V (4.7 kΩ)
  • Page 39 [PLL UNIT] [PHONE UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 6200003950 S.COL HF50ACC 322513-T 15.1/5.9 1130007700 S.IC BU4094BCF-E2 113.7/69.9 6200003950 S.COL HF50ACC 322513-T 10/7 IC101 1140007880 S.IC TC190G08AF-0046-Z/SC-1246A 106.9/89.7 IC102 1130003830 S.IC TC7S04F (TE85R) 93.1/92 IC191 1130006440 S.IC TC7S08F (TE85R) 118.3/79.6 S.RES ERJ12YJ181U (180 Ω) 7030006240...
  • Page 40 [PLL UNIT] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION D271 1790000540 S.VCP MA338 (TX) 22.3/87.9 L426 6200001830 S.COL NL 322522T-100J 85.8/11.8 L428 6200001830 S.COL NL 322522T-100J 82.5/29.1 D272 1790000540 S.VCP MA338 (TX) 24.6/87.9 D273 1790000540 S.VCP MA338 (TX) 24.5/87.9 L452 6130002970 LB-343...
  • Page 41 [PLL UNIT] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION S.RES ERJ3GEYJ 681 V (680 Ω) 7030003420 127.3/97.8 R447 7030003440 S.RES ERJ3GEYJ 102 V (1 kΩ) 100.4/14.9 7030003640 S.RES ERJ3GEYJ 473 V (47 kΩ) T 128.2/104.8 R450 7030003560 S.RES ERJ3GEYJ 103 V (10 kΩ) 75.3/32.9 S.RES ERJ3GEYJ 331 V (330 Ω) 7030003380...
  • Page 42 [PLL UNIT] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 4550006080 S.TAN TEESVB2 1C 106M8L 141.3/62.1 C207 4030006880 S.CER C1608 JB 1H 472K-T 74.3/100.2 C208 4610001860 S.TRI TZB4Z060AB10R00 70.8/92.6 4030011600 S.CER C1608 JB 1E 104K-T 109.1/66.5 4030006880 S.CER C1608 JB 1H 472K-T 7.7/51.4 C209 4030009350...
  • Page 43 [PLL UNIT] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C409 4030011600 S.CER C1608 JB 1E 104K-T 93.9/7.2 C620 4030007080 S.CER C1608 CH 1H 390J-T 41.8/39.5 C621 4030007120 S.CER C1608 CH 1H 820J-T 41.8/38.2 C410 4030011600 S.CER C1608 JB 1E 104K-T 104.4/3.5 C411 4030011600...
  • Page 44 [PA UNIT] [PLL UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C918 4030007020 S.CER C1608 CH 1H 120J-T 113.1/46.2 1180001070 S.IC TA7805F (TE16L) 20.3/71.4 1110002020 TA7805S 9.4/86.6 C919 4030009910 S.CER C1608 CH 1H 040B-T 108/42.1 C920 4030006880 S.CER C1608 JB 1H 472K-T 112.4/49.8 1180001980 MC78T08CT...
  • Page 45 [PA UNIT] [PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 7030003440 S.RES ERJ3GEYJ 102 V (1 kΩ) 61.2/17.7 6510003080 RT01T-1.0B 93/27.7 6510018960 S.CNR B2B-PH-SM3-TB 138.3/10.8 7030003440 S.RES ERJ3GEYJ 102 V (1 kΩ) 47.9/9.7 7030003560 S.RES ERJ3GEYJ 103 V (10 kΩ) 47.8/6.3 7030003560 S.RES ERJ3GEYJ 103 V (10 kΩ)
  • Page 46 [MAIN-A UNIT] [MAIN-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION Q3751 1590001960 S.TR XP4311 (TX) 112.3/76.5 IC101 1110000960 S.IC NJM4558M-TE1 88.3/26.5 Q3771 1510000510 S.TR 2SA1576A T106R T 155.7/128.3 IC151 1130006220 S.IC TC4W53FU (TE12L) 44.9/93 Q3772 1530002060 S.TR 2SC4081 T106 R T 157.2/133.8 IC152 1130003610...
  • Page 47 [MAIN-A UNIT] [MAIN-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION S.RES ERJ3GEYJ 100 V (10 Ω) L273 6150002291 LS-450 31.4/43.3 R201 7030003200 30.7/110.5 L274 6180001000 LAL 04NA 102K 39.5/52.2 R202 7030008061 S.RES ERA3YED 222V 37/118.1 S.RES ERJ3GEYJ 100 V (10 Ω) L351 6910003570 2943-666663...
  • Page 48 [MAIN-A UNIT] [MAIN-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION S.RES ERJ3GEYJ 471 V (470 Ω) S.RES ERJ12YJ4R7U (4.7 Ω) R362 7030003400 88.9/97 R611 7030006210 93.3/8.6 R363 7030003560 S.RES ERJ3GEYJ 103 V (10 kΩ) 94.2/94.6 R612 7030003440 S.RES ERJ3GEYJ 102 V (1 kΩ) 95.8/8.9 R364 7030003630...
  • Page 49 [MAIN-A UNIT] [MAIN-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION R3539 7030003720 S.RES ERJ3GEYJ 224 V (220 kΩ) 156.1/80.3 R3701 7030003640 S.RES ERJ3GEYJ 473 V (47 kΩ) 168.2/79.6 R3702 7030003640 S.RES ERJ3GEYJ 473 V (47 kΩ) 149.1/49.2 R3540 7030003720 S.RES ERJ3GEYJ 224 V (220 kΩ) 152.9/81.9 R3541 7030003720...
  • Page 50 [MAIN-A UNIT] [MAIN-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C153 4030011600 S.CER C1608 JB 1E 104K-T 46.2/89.5 C362 4030011600 S.CER C1608 JB 1E 104K-T 88.4/93.7 C363 4510004630 S.ELE ECEV1CA100SR 59.2/104.5 C154 4510006220 S.ELE ECEV1CA101UP 52.1/101.3 C155 4030011600 S.CER C1608 JB 1E 104K-T 49.9/90.3 C364 4510004630...
  • Page 51 [MAIN-A UNIT] [MAIN-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C807 4030011600 S.CER C1608 JB 1E 104K-T 23.6/135.4 C3614 4030006880 S.CER C1608 JB 1H 472K-T 148.3/71.1 C3615 4030006880 S.CER C1608 JB 1H 472K-T 139.6/68.8 C808 4510006220 S.ELE ECEV1CA101UP 22.6/128.5 C813 4510006220 S.ELE ECEV1CA101UP 30.2/128...
  • Page 52 [DSP-A UNIT] [MAIN-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION J891 6510022580 S.CNR 24FMN-BMTTR-A-TBT 191.7/60.5 IC2001 1190000970 S.IC ADSP-21061LKS-160 33.3/91.3 IC2041 1130008360 S.IC TC7SHU04FU (TE85L) 5.4/103.8 J1702 6510022620 S.CNR 10FMN-BMTTR-A-TBT 190/134 J3501 6510021860 BH-800.8 <LTC> 46/128.5 IC2042 1130008040 S.IC TC7SH04FU 11.9/103.8 J3502 6510019190...
  • Page 53 [DSP-A UNIT] [DSP-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION R2019 7030003560 S.RES ERJ3GEYJ 103 V (10 kΩ) 47.6/70.5 R2356 7030008061 S.RES ERA3YED 222V 29.7/50 R2020 7030003560 S.RES ERJ3GEYJ 103 V (10 kΩ) 39.8/70.5 R2357 7030008061 S.RES ERA3YED 222V 27.8/50 R2041 7030003800 S.RES ERJ3GEYJ 105 V (1 MΩ)
  • Page 54 [DSP-A UNIT] [DSP-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION R2578 7030003760 S.RES ERJ3GEYJ 474 V (470 kΩ) 16.1/41.2 C2302 4030011600 S.CER C1608 JB 1E 104K-T 58.9/26.6 C2303 4510006220 S.ELE ECEV1CA101UP 73.7/33.3 R2579 7030003760 S.RES ERJ3GEYJ 474 V (470 kΩ) 19.4/40.8 R2580 7030003760...
  • Page 55 [RF-B UNIT] [DSP-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C2463 4510004630 S.ELE ECEV1CA100SR 5.9/18.5 IC201 1110006430 S.IC µPC1678GV-E1-A 4.1/34.4 IC301 1160000130 S.IC TD62783AF (S,EL) 31.5/9.9 C2471 4030011600 S.CER C1608 JB 1E 104K-T 10.6/12.3 C2472 4030011600 S.CER C1608 JB 1E 104K-T 18.8/11 IC302 1160000130...
  • Page 56 [RF-B UNIT] [RF-B UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION D1202 1790000620 S.DIO MA77 (TX) 100.7/59.4 L1010 6200009690 S.COL LQH43CN101K01L 99.9/21.2 L1011 6150005320 LS-546 7K7 D1203 1750000440 S.DIO 1SV263-TL 103.8/50.5 D1204 1750000970 S.DIO CPH5513-TL 107/46.2 L1012 6200001830 S.COL NL 322522T-100J 105.3/24.5 D1205 1790001250...
  • Page 57 [RF-B UNIT] [RF-B UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION S.RES ERJ3GEYJ 820 V (82 Ω) S.RES ERJ3GEYJ 470 V (47 Ω) R114 7030003310 6.6/89.3 R1016 7030003280 111.5/24.9 R151 7030003560 S.RES ERJ3GEYJ 103 V (10 kΩ) 49.6/83.7 R1017 7030003450 S.RES ERJ3GEYJ 122 V (1.2 kΩ) 112.6/18.3 R152 7540000130...
  • Page 58 [RF-B UNIT] [RF-B UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION S.RES ERJ3GEYJ 681 V (680 Ω) R1853 7030003420 150.1/53.5 C403 4030011600 S.CER C1608 JB 1E 104K-T 40.4/28.1 S.RES ERJ3GEYJ 681 V (680 Ω) C451 4030006880 S.CER C1608 JB 1H 472K-T 136.4/14.5 R1854 7030003420...
  • Page 59 [RF-B UNIT] [RF-B UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C664 4030007130 S.CER C1608 CH 1H 101J-T 46.1/49.9 C1208 4030007100 S.CER C1608 CH 1H 560J-T 67.1/42.7 C1209 4030007030 S.CER C1608 CH 1H 150J-T 64.9/44.5 C665 4030011600 S.CER C1608 JB 1E 104K-T 47.6/52.3 C666 4030007030...
  • Page 60 [RF-B UNIT] [RF-B UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C1758 4030006880 S.CER C1608 JB 1H 472K-T 136.9/49.8 EP451 6910015970 S.BEA MMZ1608B 301CT-AS 146.4/18.3 C1759 4030011600 S.CER C1608 JB 1E 104K-T 144.3/79.6 EP452 6910015970 S.BEA MMZ1608B 301CT-AS 144.4/18.3 C1760 4030006880 S.CER C1608 JB 1H 472K-T 139.8/81.8 EP453...
  • Page 61 [BPF-A UNIT] [PREAMP UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION C3202 4030011600 S.CER C1608 JB 1E 104K-T 51/41.6 Q4201 1530003850 S.TR 2SC5551F-TD 43.8/25.9 Q4202 1530003850 S.TR 2SC5551F-TD 36.3/14.4 C3203 4030017810 S.CER C1608 CH 1H 102J-T 53.6/43.3 C3204 4030010760 S.CER C1608 CH 1H 331J-T 50.4/39.2 Q4203 1590001960...
  • Page 62 [TUNER-A UNIT] [TUNER-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 1120000970 M54562P 4010008560 DEA1X3F151JA3B 4010004250 DE1007 SL 101J 3KV 1120000970 M54562P 4010004250 DE1007 SL 101J 3KV 4010004250 DE1007 SL 101J 3KV 2040000490 EXC-ELDR25C 4010004250 DE1007 SL 101J 3KV 2040000490 EXC-ELDR25C 4620000140 UV35A 150P 6110003600...
  • Page 63 [CTRL-A UNIT] [CTRL-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION S.RES ERJ3GEYJ 221 V (220 Ω) 1590000680 S.TR DTC114EUA T106 14.2/9.5 7030003360 128/81.2 7030003480 S.RES ERJ3GEYJ 222 V (2.2 kΩ) 122.8/83.2 1590001330 S.TR DTA114EUA T106 11.7/9.5 1590000680 S.TR DTC114EUA T106 154.9/85.2 7030003680 S.RES ERJ3GEYJ 104 V (100 kΩ)
  • Page 64 [CTRL-A UNIT] [CTRL-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION S.RES ERJ3GEYJ 470 V (47 Ω) R144 7030003280 126.6/71 4030006880 S.CER C1608 JB 1H 472K-T 131.4/92.4 4030006880 S.CER C1608 JB 1H 472K-T 131.4/91 R145 7030003440 S.RES ERJ3GEYJ 102 V (1 kΩ) 133/62.8 S.RES ERJ3GEYJ 470 V (47 Ω) R146...
  • Page 65 [FILER-A UNIT] [FILER-A UNIT] ORDER ORDER DESCRIPTION DESCRIPTION LOCATION LOCATION 6140003460 LR-388 128.1/46.6 C103 4030012480 S.CER GRM31M2C2H121JV01L 146.9/43.4 6140003460 LR-388 122.8/58.7 C104 4030012480 S.CER GRM31M2C2H121JV01L 91.7/37.9 6140002280 LR-241 (T68-6) 144/46.7 C136 4030006880 S.CER C1608 JB 1H 472K-T 74.8/15 6110003540 LA-548 (LA-215A) 164.5/30.5 C137 4030006880...
  • Page 66 SECTION 6 MECHANICAL PARTS AND DISASSEMBLY [FRONT PARTS] [PHONE BOARD] REF. ORDER REF. ORDER DESCRIPTION QTY. DESCRIPTION QTY. 5080000450 Lamp SLU2LC1EX5B-TH 6450001980 Connector HLJ5815-01-030 6910011090 Sensor unit RMS20-250-201-P MP1* 8930054900 2356 earth spring 6450001230 Snap plate HLJ0999-01-480 6450001230 Snap plate HLJ0999-01-480 6910012500 Unit board TFD50W40-A (LCD) [KEY BOARD]...
  • Page 67 PHONE BOARD MP1 (F) MP19 (F) MP5 (F) MP3 (F) MP12 (F) MP7 (F) MP6 (F) MP11 (F) ME1 (F) DISPLAY BOARD KEY BOARD MP4 (F) MP51 (F) MP52 (F) MP8 (F) MIC BOARD J2 (PH) J2 (KE) MP14 (F) J1 (MI) MP11 (F) MP12 (F)

  • Page 68: Preamp Board

    MP54(C) MP46 (C) MP28 (C) MP54(C) MP53 (C) EP2 (C)+MP46 (C) MP61 (C) MP20 (C) MP16 (C) MP47 (C) MP46 (C) SP1 (C) PA UNIT MP31 (C) MP32 (C) MP79 (C) FILTER-A UNIT MP2 (C) MP34 (C) EP1 (C) MP63 (C) MP23 (C) MP72 (C) MP70 (C)
  • Page 69 [CHASSIS PARTS] [CHASSIS PARTS] [PLL UNIT] [ACCESSORIES] REF. ORDER REF. ORDER REF. ORDER REF. ORDER DESCRIPTION QTY. DESCRIPTION QTY. DESCRIPTION QTY. DESCRIPTION QTY. 6510001920 Connector 1490R MP68 8930032130 Himelon sheet AQ 8930014140 Earth spring (D) 5210000090 Fuse FGB 30A 6510000370 Connector MR-DS MP69 8930029050...
  • Page 70 SECTION 7 SEMICONDUCTOR INFORMATION • TRANSISTORS AND FET’S 2SA1576A T106 R 2SA1577 T106 Q 2SB1124 S TD 2SB1132 T100 R 2SB1201 S MMBFU310LT1 UMD3N UMH4N TN UMH11N TN UNR911HJ (Symbol: 6C) (Symbol: D3) (Symbol: H4) (Symbol: H11) (Symbol: 6P) (Symbol: FR) (Symbol: HQ) (Symbol: BG) (Symbol: BAR)
  • Page 71 • DIODES 1SS226 1SS301 1SS319 1SS322 1SS375-TL (Symbol: C3) (Symbol: B3) (Symbol: A4) (Symbol: A9) (Symbol: FH) 1SV263 TL 1SV307 1SV308 CPH5513 TL DA221 TL (Symbol: JV) (Symbol: TX) (Symbol: TX) (Symbol: 2B) (Symbol: K) DAN222TL DAP222 TL DSA3A1 DWA010 TE HSB88WSTR (Symbol: N) (Symbol: P)
  • Page 72 SECTION 8 BOARD LAYOUTS Ve r tical • MODE BOARD (TOP VIEW) • BPF-A BOARD • PREAMP BOARD (TOP VIEW) (TOP VIEW) • PHONE BOARD (TOP VIEW) • KEY BOARD (TOP VIEW) Ho ri z ontal Ho ri z ontal ELEC-KEY •...
  • Page 73 • DSP-A BOARD (BOTTOM VIEW) • TEN-KEY BOARD (BOTTOM VIEW) • MODE BOARD (BOTTOM VIEW) Ve rt ical • PHONE BOARD • KEY BOARD • PREAMP BOARD (BOTTOM VIEW) (BOTTOM VIEW) (BOTTOM VIEW) • BPF-A BOARD SSBK (BOTTOM VIEW) AM K FILK EXTK SPEK...
  • Page 74 • DISPLAY BOARD (TOP VIEW) J601 J452 J451 5V F NO TL PITL J801 to MAIN-A PB1A PB1B SSPE unit J352 to PBT to LC D PB2A PB2B board J1 to CHASSIS J531 POLC VCOM J941 L/ R U/ D N/ P L18V - 15V...
  • Page 75 • DISPLAY BOARD (BOTTOM VIEW) 8 - 4...
  • Page 76 P701 • MAIN UNIT (TOP VIEW) from PLL unit J701 J 771 to PA unit J3 J202 A GRS 3R3V_d 3R3V_d M5V_d NSQO DSDR DPGI MODS FMNS CALS DSFW AC KS MD AT DSRS J352 DSFR AM S CTFL RT DT MSL1 DSKY to DISPLA Y...
  • Page 77 • MAIN UNIT (BOTTOM VIEW) 8 - 6...
  • Page 78 • PA UNIT (TOP VIEW) • FILTER-A UNIT (TOP VIEW) to RF-B unit J201 Vertical FGND BLACK C108 C109 PAT8 C110 PWRS C111 C112 C122 C113 14VA C114 14VA C115 C102 C100 C101 C134 C133 C121 PGND BLACK C107 to FILTER-A unit J1 8 - 7...
  • Page 79 • PA UNIT (BOTTOM VIEW) • FILTER-A UNIT (BOTTOM VIEW) Ve r tical 8 - 8...
  • Page 80 • PLL UNIT (TOP VIEW) • RF-B UNIT P651 P351 1LO B 1LO A (TOP VIEW) to RF-B unit J1101 to RF-B unit J1301 Ve r tica l BPF-A_IN PREAMP_IN BPF-A_OUT POFF Ve r tical MP1451 BSTB MD AT SCPL BLA V BLBV SA TV...
  • Page 81 • RF-B UNIT (BOTTOM VIEW) • PLL UNIT (BOTTOM VIEW) Ve r tica l 8 - 10...
  • Page 82 ANT1 ANT2 • CTRL UNIT • TUNER UNIT (TOP VIEW) (TOP VIEW) V100 V100 C303 C301 C302 R154 R153 R150 R152 C109 BROWN C228 3.5M 3.5M RL11 C229 R100 R139 R101 NVHF C101 R137 R219 C102 C305 R138 R141 NVHF C306 RL14 L303...
  • Page 83 • CTRL UNIT • TUNER UNIT (TOP VIEW) (TOP VIEW) V100 V100 8 - 12...
  • Page 84 SECTION 9 BLOCK DIAGRAM IC2041 DSP-A BOARD MAIN-A UNIT RF-B UNIT TC7SHU04FU Q1901 IC2091 S-80934CNMC-G84 IC2042 Q2321 2SJ381 IC2301A XP4311 IC2092 TC7S02FU BA15532F TC7SH04FU Q2322 2SJ381 FI111 X2041 R210 IC201B IC201A CFK455E10 Q141 D113,D114 CR-568 IC151 CLOCK DIFF BA15532F BA15532F (455kHz) 3SK131 1SV308?×...
  • Page 85 Q4203,Q4204 PREAMP BOARD RX ANT ANT2 ANT1 XP4311 D1201 CPH5513 Q1201,Q1202 D1203 1SV263 Q1208 Q1203-Q1206 2SK1740 DRIVER CHASSIS D1204 CPH5513 2SC5551 2SK1740 PRE1 RANS FI1701 Q1751 FL-381 3SK131 (64.455MHz) Q1207 D1205 TUNER-A UNIT 2SC4081 MA2S111 0.03-1.6MHz XTAL SPLIT ANTS COMB 12dB DRIVER Q4201...
  • Page 86 SECTION 10 VOLTAGE DIAGRAM CP101 J101 +14V CP102 CP103 IC101a IC101c MAIN DIAL UP MAIN DIAL DOWN BU4030BF BU4030BF M UP 4.6V R124 1M R122 R123 R102 220k 100k M DN 4.6V R441 L401 CP104 C406 IC102a HF50ACC322513-B R442 R104 MC14071BFEL R443 IC102c...
  • Page 87 FRONT J301 J601 LFMD R301 LFMD +14V NOTL R601 NOTL NOTL LMFD R312 LMFD R3 47k PITL R602 PITL PITL SRES R313 SRES (PITCH) PB1A PB1A PB1A YOBI R621 PB1B PB1B PB1B R315 Q901 2.2k S622 S621 R904 DTC114EE PB2A PB2A PB2A R316...
  • Page 88 J2002 C2515 0.001 C2519 0.001 M5V_d M5V_d 3R3V_d C2506 0.0047 D-8A D-8A R2503 DSKY D-5A D-5A RTDT R2510 D8VA D8VA MSL1 R2505 CTFL R2512 R2507 DSFR R2514 R2509 L2001 C2061 R2063 R2516 MDAT D10F-A814AY-101K 3.2V DSRS M5V_d R2511 R2518 DSFW C2001 ACKS to MAIN-A...
  • Page 89 IC2291 TX 4.2V TX FM/AM/SSB:30mVp-p TC4W53FU RX 0V C2281 R2306 R2304 R2309 IC2601B 0.47 R2302 C2301 TC7SU04F C2613 R2308 IC2201 BU4053BCFV W2302 W2301 IC2601A RX 90dBµ input:200mVp-p R2242 R2241 TC7WH74FU 2.2V R2217 TX AM : 1.2V R2321 100 220k 470k IC2281C IC2281D : 970mV...
  • Page 90 L303 100µH CTRL-A UNIT LR-307 LR-307 LR-510 LR-511 LA-490 LA-489 LA-490 LA-489 LA-554 RL16 NY-12W-K NY-12W-K NY-12W-K NY-12W-K NY-12W-K NY-12W-K NY-12W-K NY-12W-K IC51 CD74HC4094M STROBE DATA 3.5M DTC114EU HSM88AS 4.5M 220k 4.6MDL IC1b NJM4558M C45 150p DTC114EU MEASUREMENT CONDITIONS VOLTMETER :50kΩ/VDC SUPPLY VOLTAGE :13.8V LR-364...
  • Page 91 CTRL-A UNIT 100µH (TUNER) MP28GA Q211 DTC114EU Q212 DTC114EU Q213 T14V DTC114EU Q214 Explanatory notes DTC114EU Q215 VOLTAGE LINE DTC114EU Q216 (TUNER) 10µH DTC114EU MP28GA Q217 DTC114EU J14 REF Q218 DTC114EU T14V 100µH 1SS319 HN58X2416TI 100µH 0.16µS P37/RD P20/D80 10µH P36/WR P21/D81 P35/SYNC...
  • Page 92 MAIN-A UNIT (1) W702 J741 C702 L701 EXC-ELDR25C L274 CP271 CP272 L271 L272 L273 C703 100mH LS-450 Q272 LS-450 Q273 LS-450 C704 Q271 Q279 C289 Q276 2SK882 2SK882 2SK882 2SC4081 0.0022 2SC4081 C705 Q278 L702 HF50ACC322513-B R285 UNR911HJ R292 2.2M Explanatory notes L703 HF50ACC322513-B...
  • Page 93 MAIN-A UNIT (1) C158 BUS LINE1 R202 2.2k IC151 IC201a FI111 TC4W53FU L151 BA15532F CFK455E10 W122 100µH 3R3V_d 3R3V_d 3R3V_d R209 R207 – 1.5k 1.5k – –5V –5V –5V L152 R208 IC201b 100µH BA15532F 1.5k CP213 14VA 14VA Q331 2SD1801 IC331 R153 1M TC4W53FU...
  • Page 94 MAIN-A UNIT (2) BUS LINE1 L3602 HF50ACC322513-B L3603 RCR-875D-472K L3601 HF50ACC322513-B 3R3V_d L3501 HF50ACC322513-B 3R3V_d –5V –5V UNLC UNLC_ R3601 D3601 TRV ON : 0V RX 0V RX 8V MA2S111 R3602 OFF : 4.8V TX 8V TX 0.2V 7.8V Q3002 FZVP 3R3V R3603...
  • Page 95 MAIN-A UNIT (2) M5V_ M5V_ H5V_ H5V_ 3R3V_d MSTB BYTE DRES_ IC3752 C3501 BU4094BCFV MSTB MDAT R3753 MSL1 C3502 R3754 MSL2 J3503 R3755 MISL R3756 MOSL MDAT R3757 470k VOSL R3758 AGRS D3750 MDAT AVCC P35/SCK1 MA2S111 VREF P34/SCK0 SCPL_ FZRX P40/AN0 P33/RXD1...
  • Page 96 MAIN-A UNIT (2) J641 M5V_ L641 220µH ETKY H5V_ START L642 220µH ETST L643 HF70ACC635050-T ET14 TUNER L644 HF70ACC635050-T L351 L353 2943-666663 HF50ACC322513-B J351 M5V_ L352 L354 IC3652 RX 6.5V 2943-666663 HF50ACC322513-B TC74AC245FT TX 0V DIR1 R3723 DB15 RX 0V SQLS_ TX 4.5V DB14...
  • Page 97 4.8V 7.7V PLL UNIT 32MHz_REF 32MHz_REF P351 J351 1LOA to RF-B unit J1301 IC191 TC7S08F L205 C150 R202 1812CS. C203 122XKBC 0.0047 C206 EP204 P651 VA4S J651 MKRSS to RF-B unit J1101 D202 KV1770S C202 Q201 Unselectde 0V 2SK508 Selected 0.7V L206 C191 1812CS.
  • Page 98 PLL UNIT 32MHz_REF R492 L491 L492 MEASUREMENT CONDITIONS L505 0.68µH 0.82µH C450 R502 1812CS. C503 VOLTMETER :10MΩ 122XKBC 0.0047 C506 EP504 OSCILLOSCOPE :20MHz 1MΩ 25pF SUPPLY VOLTAGE :13.8V C492 C494 DISPLAY :14.1MHz USB 100p D502 KV1770S C502 Q501 2SK508 L506 1812CS.
  • Page 99 PLL UNIT L701 UNLC 10µH ULPA R701 2k R702 1k ULPB DRES R703 2k R704 1k DAP222 R730 C192 UMD3N CON2A DAN222 DAN222 IC192 R705 2k R706 1k ULDA 4.8Vp-p TC7S08F VB4S CON2B ULDB 10µS R707 2k R708 1k R192 DULS 2.2k R709 2k...
  • Page 100 FILTER-A UNIT CP11 CP12 LA-548 LA-550 LA-547 RL14 RL13 AG201344 AG201344 50MHz 0.0047 0.0047 C131 0.0068 0.0068 5. 6 C133 LR-241 LR-241 0.001 RD15HVF1 TB1-160 TB1-160 RD100HHF1 0.001 LA-262 J1 0 14MHz 0. 1 LR-393 2SC1971 LR-143 LR-361 RT01T-1.0B LR-360 5.
  • Page 101 (TUNER) (CTRL) P1 CTIN CTIN T14V T14V FRONT LA-481 LA-480 CHASSIS W11 FRONT W5 J101 J601 J352 RL10 MAIN TB1-160 TB1-160 NOTL NOTL 3.5M 3.5M DIAL (TUNER) PITL PITL T14V PB1A PB1A T14V 18MHz J2002 PB1B PB1B J201 J2001 J202 21MHz PB2A PB2A...
  • Page 102 E1_8 R802 C801 L802 14VL_WEST D801 L801 D802 D301 DAN222 Selected: 10.8V IC301 4.7µ 4.7µ 1SV307 1SV307 RL101 RL102 RL103 TD62783AF E1_6 ATN203 ATN203 ATN203 D103 E1_7 R301 DAN222 R302 C807 C9001 C9012 E1_5 R303 C9021 0.03-1.6 560p 0.0047 0.0047 0.0047 E1_4 R304...
  • Page 103 PREAMP_OUT Q1001 C901 L1001 L1002 L1003 C1011 C1012 2SK1740 45.3n 135n D4101 1SV307 C4102 0.1 D3201 L3202 C3206 D3202 PREAMP_OUT 1SV307 1SV307 12µ 180p L902 C1002 C1006 C1009 D4102 LR-395 Display frequency(MHz) Line Voltage[V] L3205 1SV307 120p C3210 C3207 L4101 12µ...
  • Page 104 R1002 L1101 R1101 R1103 L1102 L1103 L1104 C1106 R1106 617DB 0.001 C1015 C1102 C1104 L1106 LR-441 Q1003 R1003 2SK1740 J1101 Q1101 1LOB from PLL D-WATCH R1012 C1016 2SC5551 unit J651 1.5k C1111 0.2V 4.4V 4.6V L1105 10µ 0.01 L1007 Left terminal 0.2V 4.4V 4.6V...
  • Page 105 Phone : +81 (06) 6793 5302 F ax : +81 (06) 6793 0013 : http://ww w .icom.c o .jp/ w o r ld/ind e x.html <Co r po r ate Headqua r ters> Communication Equipment 2380 116th A v e n ue N.E., Bell e vu e , W A 98004, U . S .A.
  • Page 106 S-14110HZ-C1-q 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan © 2004–2007 Icom Inc.

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