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8. READ the instructions of the test equipment thoroughly before connecting it to the transceiver. Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.
SECTION 1. SPECIFICATIONS M General M Transmitter • Frequency coverage: • Output power (typical): Receive 0.5–29.9999 MHz AUS versions Transmit 1.6–29.9999 MHz HIGH 100 W p-p 50 W p-p • Mode: 10 W p-p AUS versions J3E (USB), A3E (AM; RX only) Other versions Other versions J3E (USB/LSB),...
SECTION 2. INSIDE VIEWS • DISPLAY UNIT LCD DIMMER CONTROLLER (Q6301) MIC ALC AMP (IC6005) LCD DIMMER CONTROLLER (Q6302) RESET IC (IC6001) FRONT CPU CLOCK (X6001) FRONT CPU (IC6004) LEVEL CONVERTER (IC6012) LCD DIMMER CONTROLLER +8 V REGULATOR (IC6010) (IC6009) +3 V REGULATOR (IC6007) +5 V REGULATOR...
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• MAIN UNIT YGR AMP (IC1101) SRAM (IC1812) RF AMP (IC1703) (Q1116) RF AMP MAIN CPU (Q1117) (IC1806) 1/2 PRESCALER (IC1603) R8 LINE CONTROLLER (IC1804) D/A CONVERTER 1ST TX IF BUFFER (IC1815) (Q1401) LEVEL CONVERTER (IC1817) 1ST TX IF MIXER LEVEL CONVERTER (IC1401) (IC1818)
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• PA UNIT BIAS CONTROLLER RF AMP (for POWER AMP) (Q4002) (IC4002) PRE-DRIVE AMP (Q4003) COOLING FAN DRIVER (Q4001) SERIAL TO PARALLE CONVERTER COOLING FAN DRIVER (IC5001) (Q4008) POWER DIVIDER VARISTOR-2 UNIT (L4009) VARISTOR-1 UNIT POWER AMP (Q4006) POWER AMP (Q4007) POWER COMBINER (L4014)
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• DSP-2 UNIT +1.2 V REGULATOR (IC8203) (IC8201) RESET IC (IC8205) RESET IC (IC8204) AF SW AF SW (IC8217) (IC8216) USB HUB (IC8207) USB BRIDGE (IC8209) USB BRIDGE (IC8210) +3.3 V REGURATOR (IC8215) USB CODEC (IC8208)
SECTION 3. DISASSEMBLY INSTRUCTION 1. Removing the DISPLAY UNIT 2. Removing the MAIN UNIT 1) Remove 4 hex socket screws from the FRONT 1) Remove 4 screws from the top cover, and then PANEL, and then separate it from the CHASSIS. remove it.
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3. Removing the DSP-1 and DSP-2 UNITs 4. Removing the DRIVER UNIT 1) Remove the 4 screws from the bottom cover, and 1) Cut the cable tie and remove it. then remove it. MP45 Screw ×4 8950000180 CABLE TIE-80 Cable tie Bottom cover CHASSIS 2) Remove 3 screws, and then remove the PA case.
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5. Removing the PA UNIT 1) Remove the 15 screws from the PA UNIT. 2) Disconnect the 2 flat cables and 2 coaxial cables from the PA UNIT. 3) Remove the PA UNIT from the CHASSIS in the direction of the arrow. FLAT CABLE Screw ×15...
SECTION CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS 1ST RX IF CIRCUIT (MAIN UNIT) The RX signal from the preamplifier circuit is applied to the RF CIRCUIT (PA AND MAIN UNITS) 1st RX IF mixer (Q1404–Q1407) to be mixed with the 1st The RX signal from the antenna is passed through the RX LO signal, resulting in the 64.455 MHz 1st RX IF signal.
DEMODULATOR CIRCUIT (DSP-1 UNIT) The demodulated signal is applied to the CODEC (IC3611) The 3rd RX IF signal from the 3rd RX IF circuits is passed to be converted into analog AF signal. The AF signal is through the buffer (IC3602, IC3603), and then applied to the passed through the buffer (IC3615), LPF (IC3003) and AF A/D converter to be converted into digital audio signal.
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2ND TX IF CIRCUIT (MAIN UNIT) FILTER CIRCUIT (MAIN UNIT) The 2nd TX IF signal from the 3rd TX IF circuits is applied The TX signal from the 1st TX IF circuits is passed through to the 2nd TX IF mixer (D1812, D1813), to be mixed with the one of BPFs, depending on the operating frequency, to the 2nd TX LO signal, resulting in the 64.455 MHz 1st TX IF remove unwanted signals contained in the TX signal.
4-3 FREQUENCY SYNTHESIZER CIRCUITS The 3rd TX/RX LO signal (MAIN UNIT) The 1st TX/RX LO signal The 32 MHz reference frequency signal, which is gener- The 32 MHz reference frequency signal, which is gener- ated by X1601, is amplified by the buffer (Q1601) and two ated by X1601, is amplified by the buffer (Q1601) and AMPs (IC1604 and IC1605), and then applied to the divider AMP (IC1604), and then applied to the BPF (L1608,...
4-4 PORT ALLOCATIONS • FRONT CPU (DISPLAY UNIT: IC6004) Line Line Description Description Name Name LEDC LCD dimmer control. [# A a /MNGR] input. SCNK L=Pushed. CPU reset. RESET L=The CPU is reset. TEMP LCD temperature sensing voltage. L-bus communication line to the MAIN CPU. MICL MIC input level sensing voltage.
4-4 PORT ALLOCATIONS (Continued) • MAIN CPU (MAIN UNIT: IC1806) Line Description Name Binar y to decimal conver ter control. STBSEL_D H=Enabled. Binar y to decimal conver ter control. STBSEL_C H=Enabled. Binar y to decimal conver ter control. STBSEL_B H=Enabled. 4-5 VOLTAGE DIAGRAMS Voltage from the power supply is routed throughout the transponder via regulators and switches.
SECTION 5. ADJUSTMENT PROCEDURE 5-1 PREPARATION M REQUIRED EQUIPMENTS EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Frequency range : 0.1–50 MHz CS-F8100 CLONING SOFTWARE Standard signal Cloning software Output level : –20 dBµ to 90 dBµ (Revision 1.0 or later) generator (SSG) (–127 to –17 dBm) Measuring range...
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M ADJUSTMENT CHANNELS Before starting the adjustments, use the cloning software to create the same cloning fi le as shown below, then upload it into the transceiver. CONVENIENT: The cloning data fi le for the adjustment, as described in this service manual, is attached. Right click the clip icon, and select “Save Embeded File to Disk.”...
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M ENTERING ADJUSTMENT MODE 1) Turn OFF the transceiver power, if the transceiver is powered ON. ] to turn ON the transceiver power . 2) While holding down [#], [ ], [ ] and [ ], push [ • The login screen appears as below. 3) Enter “SX-3500,”...
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5-2 RECIEVE ADJUSTMENTS • Select the item using [ ]/[ ], and then set or modify the value as specifi ed, using [ ]/[ TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE ITEM CONDITION 1 • Channel: • Set the preset values. "SSB SQL" "0"...
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5-2 RECIEVE ADJUSTMENTS (Continued) • Select the item using [ ]/[ ], and then set or modify the value as specifi ed, using [ ]/[ ADJUSTMENT TRANSCEIVER’S ADJUSTMENT OPERATION VALUE ITEM CONDITION RF GAIN 1 • Channel: 1) Connect an SSG to the antenna Set this AF •...
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5-3 TRANSMIT ADJUSTMENTS • Select the item using [ ]/[ ], and then set or modify the value as specifi ed, using [ ]/[ TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE CONDITION ITEM NOTE: Start this adjustment after the transceiver is cooled. REFERENCE FREQUENCY 1 •...
5-3 TRANSMIT ADJUSTMENTS (Continued) • Select the item using [ ]/[ ], and then set or modify the value as specifi ed, using [ ]/[ TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE CONDITION ITEM 1 • Channel: 8 • Connect an RF power meter "MID"...
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5-3 TRANSMIT ADJUSTMENTS (Continued) • Select the item using [ ]/[ ], and then set or modify the value as specifi ed, using [ ]/[ TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE CONDITION ITEM TX IF 1 • Channel: 9 1) Connect an RF power meter "HIGH"...
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5-3 TRANSMIT ADJUSTMENTS (Continued) • Select the item using [ ]/[ ], and then set or modify the value as specifi ed, using [ ]/[ TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE CONDITION ITEM 1 • Channel: 11 1) Connect an RF power meter (CONFIG Menu)* "RF Power"...
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5-3 TRANSMIT ADJUSTMENTS (Continued) • Select the item using [ ]/[ ], and then set or modify the value as specifi ed, using [ ]/[ TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE CONDITION ITEM TX POWER 1 • Channel: 12 • Connect an RF power meter (CW mode) •...
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[PA UNIT] [DRIVER UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION EP4005 6910020710 E.O OT-047 M3 Q6851 1590003061 S.FET PD55015-E 9.7/20.0 EP5002 6910018930 S.BEA MPZ2012S601A 125.3/130.7 R6851 7030010480 S.RES ERJ1TYJ 181U (180) 8.2/13.1 R6852 7030000020 S.RES MCR10EZHJ 1 (010) 2.0/15.4 C6851 4030004750 S.CER C2012 JB 1H 103K-T 14.1/14.1 Eqv.= This component is equivalent to the REF No.
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[VARISTOR-1 UNIT] [VARISTOR-2 UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION D6431 1750000940 S.DIO 1SS400 TE61 3.5/13.4 D6431 1750000940 S.DIO 1SS400 TE61 3.5/13.4 C6431 4030008920 S.CER C1608 JB 1H 473K-T 3.7/11.7 C6431 4030008920 S.CER C1608 JB 1H 473K-T 3.7/11.7 Eqv.= This component is equivalent to the REF No. component listed above, and M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) may be substituted on parts orders and repairs.
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[MIC UNIT] PARTS DESCRIPTION LOCATION C6901 4030006860 S.CER C1608 JB 1H 102K-T 8.5/8.6 J6901 6510025142 S.CON 10FLT-SM2-TB(LF)(SN)(M) 10.0/5.0 J6902 6510022440 CON LTW-8MP-C NUTGASKET <LIA> Eqv.= This component is equivalent to the REF No. component listed above, and M.=Mounted side (T: Mounted on the Top side, B: Mounted on the Bottom side) may be substituted on parts orders and repairs.
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The combination of top side and bottom side of this SECTION 8 BOARD LAYOUTS • DISPLAY UNIT B-7821B (TOP VIEW) S6303 S6302 S6322 DS6302 DS6301 DS6314 S6304 S6301 S6323 C6310 DS6320 DS6319 IC6014 DS6309 C6309 R6350 S6324 DS6324 DS6323 DS6310 S6325 S6305 S6306...
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The combination of top side and bottom side of this • DISPLAY UNIT B-7821B (BOTTOM VIEW) B7821B C6006 C6060 C6048 C6053 C6061 Q6002 CMSEL L6002 VLED C6033 Q6003 EP6009 C6059 C6054 J6002 EP6001 C6016 R6021 C6002 C6004 R6081 R6082 R6354 R6009 R6010 C6035...
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The combination of top side and bottom side of this • MAIN UNIT B-7818B (TOP VIEW) J1001 TO PA UNIT R1428 C1452 B7818B L1433 R1441 C1300 R1442 R1532 C1246 R1176 C1470 R1445 Q1111 R1533 Q1112 Q1409 J1001 R1429 R1440 C1469 L1418 L1410 L1455...
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The combination of top side and bottom side of this • MAIN UNIT B-7818B (BOTTOM VIEW) EP1006 C1002 C1009 C1880 EP1003 R1001 L1456 C1005 EP1004 EP1007 R1993 R1978 C1003 R1963 C1904 C1872 Q1814 C1414 L1817 Q1103 C1874 L1810 C1897 C1899 C1898 EP1804 C1006...
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The combination of top side and bottom side of this L4003 B-7827C C4030 R4011 C4023 • PA UNIT B-7827C R4019 R4020 Q4002 L4002 R4002 J4001 (TOP VIEW) C4035 R4033 J4009 J5002 R4026 L4020 J4009 C4026 C4037 C4038 R4069 R4068 R5109 J5005 R5108 C4044...
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The combination of top side and bottom side of this • PA UNIT B-7827C C4099 R4009 R4023 C4022 (BOTTOM VIEW) C4025 D5084 D5087 D5091 D5090 D5089 D5088 D5083 D5082 R4006 C5360 R4008 Q5019 R5002 C4040 EP4003 C4047 R5007 R5008 D5002 C4043 C5113 C5071...
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The combination of top side and bottom side of this • DSP-1 UNIT B-7819B (TOP VIEW) J3306 J3305 MP9 (IC clip) J3306 J3305 IC3011 R3100 R3101 R3102 C3666 R3662 R3686 R3699 C3727 C3728 C3729 J3007 C3014 R3018 R3032 L3603 R3666 R3685 C3061 C3705...
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The combination of top side and bottom side of this • DSP-1 UNIT B-7819B (BOTTOM VIEW) D3607 D3606 C3689 EP3012 R3647 R3044 R3692 C3639 C3688 R3724 C3020 C3011 R3725 R3726 C3041 C3009 IC3607 IC3615 R3727 C3690 R3078 C3048 IC3003 R3728 C3691 R3074 EP3007...
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SECTION 9 GENERAL WIRING ANT TUNE GPS EXMOD DC IN CFU-F8100 DSP2 W117 OPC-2139 W103 EP4004 J5005 EP4005 DSP1 W119 MAIN J1003 HM-192 RMK-6 CMSEL VLED MICG J6001 J6901 J6902 1:MIC DISPLAY 2:MIC SW1 3:AF OPC-2083B MICE MICE 4:MIC SW2 5:PTT J6003 6:GND...
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