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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.
SECTION 3 CIRCUIT DESCRIPTION • 30–60 MHz SIGNALS 3-1 RECEIVER CIRCUITS RX signals from the band SW (RL351) are passed though ANT-SW UNIT one of the BPFs (Fc=50–54 MHz or Fc=54–60 MHz) to Antenna switching relays (RL51, 61, 71, 81) select the RX remove unwanted signals.
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MAIN UNIT SCOPE UNIT MIAN UNIT contains receive circuits; from demodulator The 1st RX/TX IF signal from the buffer (Q1352) on the RF to AF circuits. The 2nd IF signal is demodulated by digital UNIT are passed through the scope IF SW (IC31), scope audio processing circuits.
CTRL BOARD 3-2 TRANSMITTER CIRCUITS The CTRL BOARD mainly contains circuits for parameter MAIN UNIT detection of TX signal; Forward Wave, Reflected wave, The MAIN UNIT contains transmit circuits; from MIC AMP to Reactance, Resistance, antenna current and voltage. modulator cicuit. TX signal from the FILTER UNIT is passed through several •...
3-3 FREQUENCY SYNTHESIZER CIRCUITS <2nd TX LO signal> PLL UNIT The VCO output signal from the hybrid divider is passed PLL UNIT provides LO signals; 1st LO for TX/RX IF circuits, through the ATT, and applied to the 2nd LO AMP (Q591). 2nd RX LO (64.491 MHz), 2nd TX LO (64 MHz), 3rd TX LO The amplified VCO output signal is passed through the BPF, (491 kHz), marker frequency (100 kHz), reference frequency...
3-4 MAIN CPU (IC604) PORT ALLOCATIONS Description Condtion Clock signal to 4094/LMX2306 (PLL UNIT). (DDS for 1st LO PLL-IC/DDS, 2nd TX LO DDS, 3rd TX LO) "Serial data to 4094/LMX2306 (PLL UNIT). (DDS for 1st LO PLL-IC/DDS, 2nd TX LO DDS, 3rd TX LO) 44 N/C 45 Mode status (1Lo or T2Lo) output.
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3-4 MAIN CPU (IC604) PORT ALLOCATIONS (continued) Condtion Description 23 Clock to the EEPRROM (HN58X2464TI). 24 Serial data from the EEPRROM (HN58X2464TI). 26 Clock signal to the EEPROM (DIGISEL UNIT; CAT24WC256). 27 Serial data from/to the EEPROM (DIGISEL UNIT; CAT24WC256). 30 RTTY keying.
SECTION 4 ADJUSTMENT PROCEDURE 4-1 PREPARATION ¤ REQUIRED EQUIPMENTS EQUIPMENT SPECIFICATION EQUIPMENT SPECIFICATION Input impedance : 50 kΩ/DC or more Frequency range : At least 90 MHz Spectrum analyzer Digital multimeter Measuring range : Voltage: 0.1–10V Bandwidth : 100 kHz or more Current: 5A/30A Measuring range : 10–300 W...
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¤ UNITS LOCATION <Bottom view> OSC UNIT SCOPE UNIT PLL UNIT RF UNIT MAIN UNIT ¤ CONNECTIONS CAUTION ! DO NOT select an TX adjustment item while an SSG RF power meter is connected to the antenna connector. <Rear view> REMOTE EXT-DISPLAY RS-232C...
4-2 ADJUSTMENTS ON THE OSC UNIT AND PLL UNIT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE POINT REFERENCE 1 • Reference signal source : 1) C o n n e c t a n S t a n d a r d S i g n a l SIGNAL LEVEL External Generator to J1071 ([EXT-REF I/O]...
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- ADJUSTMENT AND CHECK POINTS - To RF voltmeter To RF voltmeter • PLL UNIT (TOP VIEW) TX 2nd LO level TX 2nd LO level From SG From SG adjustment adjustment RX 2nd LO level RX 2nd LO level • PLL UNIT •...
4-3 ADJUSTMENTS ON THE RF UNIT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE POINT PRERARATION 1 • Frequency : 14.150 MHz • Connect a Digital multimeter to R1101 4.4–4.6 V (Preset) • Mode : USB CP1102" (RF UNIT). (RF UNIT) • ANTENNA : [ANT1] •...
4-4 ADJUSTMENTS ON THE PA200W BOARD ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE POINT IDLING "IDLING" must be adjusted by cold-started. (Preparation) 1 • Mode : USB • Connect an Audio Generator to the • MIC gain : Minimum MIC jack (see the page 4-2) and set it as;...
4-5 ADJUSTMENTS ON THE MAIN UNIT (including RF UNIT) ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE POINT PREPARATION 1 • Receiving 1) Turn the power OFF. (Preset) 2) Push and hold [F-INP]+[MW] keys, – – and turn the power ON (All clear). •...
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- ADJUSTMENT AND CHECK POINTS - • MAIN UNIT • SCOPE UNIT (TOP VIEW) (TOP VIEW) Preset/APC(Vd) adjustment Preset/APC(Vd) adjustment J751 J731 R721 J721 Preset/APC(Id) adjustment Preset/APC(Id) adjustment C722 J702 C101 J701 R2006 R2042 R2042 J901 TO LOGIC J826 C703 R2006 R2091 D2091...
4-7 AUTOMATIC ADJUSTMENTS ¤ ENTERING AUTOMATIC ADJUSTMENT MODE 1) Connect the short plug to the [REMOTE] terminal (see the illust bellow). 2) Push and hold [SSB]+[CW] keys and turn the power ON, then the adjustment main menu appears. 3) When the automatic adjustments are fi nished, turn the power OFF to quit the adjustment mode. <Main menu>...
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4-7-1 AUTOMATIC ADJUSTMENTS (TRANSMITTER) <TX adjustment screen> SPLIT LOCK GENE F-INP MP-W MP-R AUTO RTTY/PSK AM/FM DATA M.SCOPE EXIT/SET LOCK TUNE PLAY COMP MONI GAIN VOX GAIN CONTRAST BRIGHT VOICE MEMORY Adjustment value Adjusts Adjustment item Return to main menu Stores the adjustment value Selects the next adjustment item Selects the previous adjustment item...
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4-7-2 AUTOMATIC ADJUSTMENTS (TRANSMITTER) ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE ITEM PREPARATION 1 1) Connect an Audio Generator to the MIC jack and set it as; Frequency : 1.5 kHz Level : 10 mV – – 2) Connect an RF power meter to the [ANT1]. 3) Connect an terminator (SWR=2) to the [ANT2].
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4-7-2 AUTOMATIC ADJUSTMENTS (RECEIVER) <RX adjustment screen> SPLIT LOCK GENE F-INP MP-W MP-R AUTO RTTY/PSK AM/FM DATA M.SCOPE EXIT/SET LOCK TUNE PLAY COMP MONI GAIN VOX GAIN CONTRAST BRIGHT VOICE MEMORY Adjustment value Adjusts Adjustment item Return to main menu Stores the adjustment value Selects next adjustment item Selects previous adjustment item...
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4-7-2 AUTOMATIC ADJUSTMENTS (RECEIVER) ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE ITEM TOTAL GAIN 1 • Receiving 1) Connect an AC millivoltmeter to (PREPARATION) [EXT-SP]. 2) Connect an SSG to the [ANT1] and – – set it as; Frequency : 14.1515 MHz Modulation : None HF (P.AMP OFF) 1 •...
4-7-3 REFERENCE FREQUENCY <Reference frequency adjustment screen> SPLIT LOCK F-INP GENE MP-W MP-R AUTO RTTY/PSK AM/FM DATA M.SCOPE EXIT/SET LOCK TUNE PLAY COMP MONI GAIN VOX GAIN CONTRAST BRIGHT VOICE MEMORY Adjustment value Adjusts Adjustment item Return to main menu Stores the adjustment value Never push (Disable) Never push (Disable)
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4-7-3 REFERENCE FREQUENCY ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITION OPERATION VALUE ITEM REFERENCE 1 • Wait more than 5 min. from 1) Connect a Frequency Counter to 10.0000000 FREQUENCY turning main power ON with the [REF I/O] connector. [REF] [I/O] on the rear panel, then 2) Adjust the reference frequency (±0.1 Hz) adjust the reference frequency.
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• OVERALL UNIT ABBREVIATIONS: FRONT UNIT CH: CHASSIS MP2(CH) MAN: MAIN UNIT LOGIC UNIT DIS: DISPLAY BOARD JCK: JACK BOARD LED: BOARD MIC: MIC BOARD PBT: PBT BOARD PIT: PITCH BOARD TUN: TUNER UNIT ANT: ANT-SW BOARD CTL: CTRL BOARD DCD: DC-DC UNIT DGL: DIGISEL UNIT FIL: FILTER UNIT...
• CHASSIS (BOTTOM SIDE) UNIT ABBREVIATIONS: FRONT UNIT MP8(CH) CH: CHASSIS MAN: MAIN UNIT LOGIC UNIT DIS: DISPLAY BOARD JCK: JACK BOARD LED: BOARD MIC: MIC BOARD PBT: PBT BOARD PIT: PITCH BOARD MP16(CH) TUN: TUNER UNIT ANT: ANT-SW BOARD CTL: CTRL BOARD DCD: DC-DC UNIT DGL: DIGISEL UNIT...
W301-304 W140-141 W134-135 S P 1 J 9 4 1 J 6 0 6 ( D I S P L A Y B O A R D ) J 7 6 2 J 8 0 1 I N T S P J 8 4 1 MAIN UNIT J 1 0 7...
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SECTION 9 BLOCK DIAGRAM PLL UNIT Cutoff CONTROL IC201 ADF4116 FI101 2SC522 6 Q151 Q341/Q441 2SC5226 SFECV10.5MA5 2SC408 1 64.485-72.454999MHz CERAMIC LOOP PHAS E 10.4122038-10.4963312MHz FILSEL 1/21 AM P BUFF AM P AT T Q220 2SK210 Q301 DTC114Ex2 Q302 VA1S DATA/CK/STB2 72.455-79.454999MHz Q303...
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MAIN UNIT IC701 SKYS_from_LOGIC TX IF SPDI(TO LOGIC) (36kHz) BUFF SPDI_to_LOGIC I C2001 NJM2058 Q2001 SN74LVC1G08DCKR S/P DIF 2SA1576 IC1801/IC1841 SPDO_from_LOGIC REFV SWITCH SERI / ACC(1) REFV_from_CTR L ALC-AMP SIGNAL PARA MDAT/MCK/MSTB1 IC721:PS7122A L Q721/Q722:DTC114Tx2 CD74HC4094x2 IDL_to_LOGIC RL721 IDHV HFS/ 50MS/ AMS/ MMUT/ MCPS/ SMUT/ SPON/ UNSB/ FMS/ AFON/ RAMS EXRL1 ACC(2) IDHV_from_PA...
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RF UNIT TXB1 IC501/IC502 FI503 FI501 Q504 Q506 Q50 8 Q801 Q501 NJM5534x2 D506 IC503 CFWS455D D505 FL-348 2SC550 1 2SC5551 3SK294 2SK882 2SK882 HSB88W S TA4107 HSB88WS CERAMIC TX IF IN (TX36kHz) 1.6 - 2M AM P AM P AM P TXB2 Bw=20k...
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ANT-SW UNIT PA UNIT FILTER UNIT D101/D102 D 151/D152 D201/D202 D301/D30 2 HSM88ASx2 HSM88ASx2 HSM88ASx2 HSM88ASx2 RL252 RL253 RL51 ANT1 D303 IC2:TA78L08 PA200W BOARD CTIN CRNT SWR-DET P-DET R-DET Q1:2SB1119 Q2:DTC114E PAT8 RL402 1.8M RL401 D C_BUFF BIAS THRU1 THRU2 ANT 1 Q401A Q252:2SB112 3...
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SECTION 10 SCHEMATIC DIAGRAM • FRONT UNIT LDPS R339 DISPLAY BOARD DS12 L210 L211 R340 D 10F-#A814AY D 10F-#A814AY VOXD STBD STBD STBY LED SML-512MW L601 PWRD VOXD J602 3R3V TN1D 52808-2071 Q201 SML-512DW TN2D IC601 2SC3647 J301 4.7K TIMD T201 C202 LDPS...
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MAIN UNIT (MAIN-1) To LOGIC UNIT J826 To LOGIC UNIT J810 To RF UNIT J150 To LOGIC UNIT J809 To RF UNIT J2006 To LOGIC UNIT J808 To DC-DC UNIT J3 DACK R801 R803 C400 R560 0.0047 100K SPDI SPDO DACK SPDI SPDO...
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MAIN UNIT (MAIN-3) +A5V C1201 I C1201 R1010 R1201 R1011 3.3K R1012 TC7W53FK MP1001 3009 R1013 R1204 C1204 Q1201 I C1111 I C1112 DTC114EU /HOL D R1112 R3111N111A TC7SH08FU R1212 4.7K R1113 C1212 I C1211 NJM5534MD C1211 R1211 R1005 R1213 C1213 4.7K R1001...
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• LO IC UNIT (TOP VIEW) C979 EP918 J810 J826 J810 J808 EP919 J808 TO MAIN J816 J826 C980 TO MAIN J821 TO MAIN J961 C967 R693 J816 C966 EP1117 J901 R692 EP1116 C970 TO PLL R1129 R1115 R1128 C971 C635 EP1114 C965...
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