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SERVICE
MANUAL
HF TRANSCEIVER
iF7000
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INTRODUCTION DANGER This service manual describes the latest service information NEVER connect the transceiver to an AC outlet or to a DC for the IC-F7000 HF TRANSCEIVER at the time of publica- power supply that uses more than 16 V. This will ruin the transceiver. tion. DO NOT expose the transceiver to rain, snow or any liquids. DO NOT reverse the polarities of the power supply when MODEL SYMBOL VERSION connecting the transceiver. AUS Autralia IC-F7000 OTH Other DO NOT apply an RF signal o
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TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 ABOUT EXTERNAL REFERENCE SIGNAL INPUT SECTION 4 CIRCUIT DESCRIPTION SECTION 5 ADJUSTMENT PROCEDURES SECTION 6 PARTS LIST SECTION 7 MECHANICAL PARTS AND DISASSEMBLY 7 - 1 RC-26....................................................................................................................................................... 7 - 1 7 - 2 HM-146 ............................................................................
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SECTION 1 SPECIFICATIONS • IC-F7000 ‘ ‘ GENERAL • Frequency coverage : Receive 500 kHz–29.9999 MHz Spec (MHz) No Spec (MHz) 1.6–5.4999 5.5–5.7299 5.73–5.9999 6.0–6.6999 6.7–8.0999 8.1–9.999 Transmit 10.0–11.1999 11.2–13.3999 13.4–14.9999 15.0–17.9999 18.0–18.9999 19.0–19.9999 20.0–20.9999 21.0–22.9999 23.0–27.9999 28.0–29.9999 • Mode : J3E (USB/LSB), *J2B (AFSK), *F1B (FSK), *A1A (CW), A3E *[OTH] version only • Antenna impedance : 50 Ω • Frequency stability : ±50 Hz • Power supply requirement :
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• RC-26 REMOTE CONTROLLER ‘ ‘ GENERAL • Microphone impedance : 600 Ω • Audio output power : More than 2 W at 4 Ω load with 10% distortion • Audio output impedance : 4 Ω • Usable temperature range : –10˚C to +60˚C; +14˚F to +140˚F 29 31 • Dimension (projections not included) : 150(W) × 50(H) × 51(D) mm; 5 ⁄32(W) × 1 ⁄32(H) × 2(D) in. • Weight : Approx. 220 g; 7.8 oz (Connection cable is not included.) • SP-25 EXTERNAL SPEAKER ‘ ‘ GENERAL • Impedance : 4 Ω • Input power : Rated input; 5 W Maximum
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7 5.4 ( 32) (d) 7 7 5.4 ( 32) 5.4 ( 32) 3 231 (9 32) 3 155 (6 32) 11 287.8 (11 32) 7 240 (9 16) Unit: mm (inch) 1 6 ( 4) 1 - 3 13 1 239.3 (9 32) 1.9 ( 16) 27 1 72 (2 32) 1.7 ( 16) 7 87 (3 16) 7 22.5 ( 8) 9 32.2 (1 32) 1 133 (5 4) 31 31 50 (1 32) 50 (1 32) 3 55.4 (2 16) 31 31 25 ( 32) 25 ( 32)
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11 9 ( 32) 13 173.2 (6 16) 29 1 150 (5 32) 51.2 (2 32) 1 9 6.5 ( 4) 40 (1 16) 7 158.2 (6 32) 9 25 9 40 (1 16) 45 (1 32) 40 (1 16) Unit: mm (inch) 7 5.5 ( 32) 5 15 66.3 (2 8) 37 (1 32) Unit: mm (inch) 1 - 4 1 89 (3 2) 7 7 31 5.4 ( 32) 5.4 ( 32) 50 (1 32) 5 66.6 (2 8) 9 14.6 ( 16)
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SECTION 2 INSIDE VIEWS • RC-26 CPU CPU CPU (IC8201: HD64F2134AF20) (IC8201: (IC8201: HD64F2134AF20) HD64F2134AF20) Reset IC Reset IC (IC8202: S-80942CNMC-G9C) (IC8202: (IC8202: S-80942CNMC-G9C) S-80942CNMC-G9C) +8V regulator +8V regulator (IC8310: TA78L08F) (IC8310: (IC8310: TA78L08F) +10V regulator +10V regulator (IC8301: AN8009M) (IC8301: (IC8301: AN8009M) AN8009M) +5V regulator +5V regulator (IC8290: TA7805F) (IC8290: (IC8290: TA7805F) CONNECT BO CONNECT BO CONNECT BOARD ARD Dimmer controller
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• IC-F7000 (TOP VIEW) TX 1st mix TX 1st mix TX 1st mixe er r (Q702,Q703: (Q702,Q703: (Q702,Q703: 3SK131) 3SK131) YGR amplifier YGR amplifier YGR amplifier (IC1: (IC1: µµ PC2709T) PC2709T) RF 1st mix RF 1st mix RF 1st mixer er (Q201-Q204: MBU310×4) 1st IF amplifier 1st IF amplifier 1st IF amplifier (Q203: (Q203: (Q203: 3SK131) 3SK131) 2nd mix 2nd mix 2nd mixe er r (D303: (D303: HSB88WS) HSB88WS) HSB88WS) MAIN UNIT MAIN UNIT MAIN UNIT CPU CPU (IC3303: (IC3303: M30624FGAFP) M30624FGAFP) M30624FGAF
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SECTION 3 ABOUT EXTERNAL REFERENCE SIGNAL INPUT ‘ ‘ IN CASE OF USING EXTERNAL REFERENCE SIGNAL NEED TO MODIFY the PLL unit (bottom side) as below when using external reference. 4 1 5 8 85 14 q Remove R5251 from the PLL unit. w Solder disconnect points (CP5041) on the PLL unit. q w R5251 CP5041 3 - 1
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‘ ‘ IN CASE OF USING INTERNAL REFERENCE SIGNAL NEED TO MODIFY the PLL unit (bottom side) as below. Otherwise the transceiver does not work properly. q Unsolder connect points (CP5041) on the PLL unit. w Solder R5251 to the original position, or solder disconnect points (CP5251) on the PLL unit. q w CP5251 CP5041 ‘ ‘ CONNECTION Connect the external reference oscillator to the IC-F7000 as below. IC-F7000 front panel External reference Frequency : 32 MHz [REF IN] Level : 2.0–8.0 Vp-p at 15 kΩ imped
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SECTION 4 CIRCUIT DESCRIPTION 4-1-2 1ST MIXER AND IF CIRCUITS (MAIN UNIT) 4-1 RECEIVER CIRCUITS The 1st mixer circuit converts the received signals into a 4-1-1 RF FILTER CIRCUIT (PLL AND MAIN UNITS) fixed frequency, 64.445 kHz 1st IF signal using PLL output Received signals from the antenna connector are applied to frequency. By changing the PLL frequency, only the desired the transmit/receive switching and protection relay (PLL unit; frequency is picked up at the 64.445 kHz bandpass filter RL7
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4-1-5 DSP RECEIVER CIRCUIT (MAIN AND DSP The receiver gain is determined by the voltage on the AGC1 line from the DSP unit. The D/A converter for the AGC UNITS) (IC9102) supplies control voltage to the AGC1 line and sets The DSP (Digital Signal Processor) circuit enables digital IF the receiver gain with the [RF/SQL] control. filter, digital noise reduction, digital PSN (Pulse Shift Network), phase demodulation, digital automatic notch, and The 3rd IF signal from the CODEC IC (IC9501) is detecte
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When the speech compressor function is ON, the level-shift- 4-2 TRANSMITTER CIRCUITS ed signal from the CODEC IC (IC9501) is applied to the DSP 4-2-1 MICROPHONE AMPLIFIER CIRCUIT IC (IC9301) and compressed at the DSP IC to obtain an (RC-26, MAIN AND DSP UNITS) average audio level. The microphone amplifier circuit amplifies microphone audio signal to a level needed for the DSP circuit. At the same time, the compressed signals are modulated at the DSP IC and applied to the D/A converter section i
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4-2-5 RF CIRCUIT (MAIN, PA, PLL UNITS AND DRI- • 2.5–3.49999 MHz signals The signals are applied to the relay (FILTER unit; RL7061). VER BOARD) The signals pass through the low-pass filter (FILTER unit; The RF circuit amplifies operating (transmitting) frequency L7067, L7068, C7072, C7073, C7077–C7083), and are then to obtain 100 W (125 W: 1.6–4 MHz for [OTH]) of RF output. applied to the RL7062 which is controlled by the band con- trol IC (MAIN unit; IC3602) as the “L2M” signal via the buffer T
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4-2-6 ALC CIRCUIT (PLL AND MAIN UNITS) 4-2-8 RF METER CIRCUIT (MAIN UNIT) The ALC (Automatic Level Control) circuit controls the gain The output of ALC amplifier (IC1201, pin 14) is applied to the of IF amplifiers in order for the transceiver to output a con- CPU (IC3303, pin 97) as “RFML” signal to indicate the trans- stant RF power even when the supplied voltage shifts, etc. mit power level on the display. For antenna current meter indication, the “ANTM” signal The RF power level is detected a
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4-4 FRONT UNIT (RC-26) The detected signal output from the PLL IC (pin 2) is con- 4-4-1 LCD CIRCUIT (DISPLAY AND CONNECT verted into a DC voltage (lock voltage) at the loop filter and BOARDS) then fed back to one of the VCO circuits (Q5521, D5521, The LCD (CONNECT board; DS8920) is controlled by the L5523). LCD driver (CONNECT board; IC8940) via the drive signals (CL1, RES, CS, RS, WR, RD, DB0–DB7) from the display The oscillated signal from the buffer amplifier (Q5601) is board. The LCD’s back
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4-5-4 MAIN UNIT VOLTAGE LINE 4-5 POWER SUPPLY CIRCUITS 4-5-1 PA UNIT VOLTAGE LINE LINE DESCRIPTION LINE DESCRIPTION S13V The voltage from the PA unit via the J1901. HV13 The voltage from an external power supply. Receive 13 V converted from the S13V line and R13V regulated by the R13 regulator circuit (Q1505). The same voltage as the HV13 line passed HV through the fuse (F6701). Common 8 V converted from the S13V line and 8V regulated by the +8 regulator circuit (IC1502). The same voltage as the
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4-6 PORT ALLOCATIONS MAIN CPU (MAIN UNIT; IC3303)–continued 4-6-1 MAIN CPU (MAIN UNIT; IC3303) Pin Port Pin Port Description Description number name number name Outputs T8 regulator circuit (MAIN Outputs serial clock signal for the 1 TXS 90 ECK unit; Q1501) control signal. EEPROM (IC3301, pin 6). Outputs R8 and R13V regulator cir- Input port for the SEND signal from 92 ASEN 2 RXS cuits (MAIN unit; Q1502, Q1505) con- the accessory connector (J1801). trol signal. Input port for the power amplifier
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4-6-4 OUTPUT EXPANDER IC FOR BANDPASS FIL- 4-6-6 D/A CONVERTER IC (MAIN UNIT; IC3606) TERS (MAIN UNIT; IC3604) Pin Port Description Pin Port number name Description number name Outputs transmit power control signal. Outputs 0.5–1.999999 MHz bandpass The signal is applied to the ALC ampli- 4 B0S 5 POCV filter control signal. fier (IC1201, pin 3) and RF amplifier (Q701). Outputs 2–2.999999 MHz bandpass 5 B1S filter control signal. Outputs the cooling fan control signal. 11 FANS The signal is appli
