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SERVICE
MANUAL
VHF FM TRANSCEIVERS
S-14303HZ-C1
July 2006
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INTRODUCTION This service manual describes the latest service information for the IC-F3021T/S, IC-F3022T/S and IC-F3023T/S VHF FM TRANSCEIVERS at the time of publication. Channel MODEL Key Pad VERSION SYMBOL Spacing IC-F3021T 10-key 15.0 kHz / U.S.A [USA-02] 30.0 kHz IC-F3021S 4-key 12.5 kHz / IC-F3022T 10-key Europe [EUR-02] 20.0 kHz / IC-F3022S 4-key 25.0 kHz IC-F3023T 10-key 12.5 kHz / General [GEN-02] 25.0 kHz IC-F3023S 4-key To upgrade quality, any electrical or mechanical parts and
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TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY INSTRUCTIONS SECTION 4 OPTIONAL UNIT INSTALLATION SECTION 5 CIRCUIT DESCRIPITON 5-1 RECEIVER CIRCUITS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 5-2 TRANSMITTER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 5-3 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . .
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SECTION 1 SPECIFICATIONS [USA], [GEN] [EUR] Frequency coverage 136–174 MHz Type of emission Wide 16K0F3E (25.0 kHz) Middle – 14K0F3E (20.0 kHz) Narrow 11K0F3E (12.5 kHz) 8K50F3E (12.5 kHz) Number of programable channels 128 channels (8 zones) Antenna impedance 50 Ω (nominal) Operating temperature range −22˚F to +140˚F –25˚C to +55˚C Power supply requirement Specified Icom’s battery packs only (Operatable voltage; 7.2 V DC negative ground) Current drain Stand-by 75 mA RX (approx.
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SECTION 2 INSIDE VIEWS MAIN UNIT TOP VIEW BOTTOM VIEW +5 regulator Q26: 2SB1132 Q27: XP6501 () Q28: UNR9213J AF amplifier (IC15: TA7368FG) CPU5 regulator TX VCO (IC17: NJM2870) Q16: 2SC5006 IF amplifier D10, D13, D34: (Q7: 2SC5107) 1st mixer () HVC375B (Q6: 3SK324) PLL IC RX VCO R5 regulator (IC2: MB15A02PFV1) Q17: 2SC5006 (Q25: 2SA1577) D9, D11, D33: () IF IC HVC375B Ceramic filter (IC9: TA31136FNG) 450 KHz VCO circuits (FI2: CFWM450F) LCD driver S5 regulator (IC20: LC75834W) Crystal
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SECTION 3 DISASSEMBLY INSTRUCTIONS 1 REMOVING THE CHASSIS UNIT q Unscrew ANT nut A, and remove knob B. e Unscrew 6 screws J. w Unscrew 2 screws C, and remove the jack panel. r Remove the side plate I. e Unscrew 2 screws D, and unplug the connector E from t Unsolder 8 points K, and remove the shield cover. the chassis unit. y Unsolder 8 points L, and take off the MAIN UNIT in the r Take off the chassis unit in the direction of the arrow from direction of the arrow. the front panel. Shied co
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SECTION 4 OPTIONAL UNIT INSTALLATION CAUTION! Optional unit installation should be done at authorized Icom servise center only. Install the optional unit as follows. r Install the unit as below. q Rotate [VOL] to turn the power OFF, and remove the battery pack. w Remove the unit cover as below. (The removed unit cover can not be used again.) UT-108R UT-109R UT-110R t Remove the paper backing of the supplied unit cover, e Cut the pattern on the PC board at “MIC” and “DISC” an
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SECTION 5 CIRCUIT DESCRIPTION The converted 1st IF signal is passed through the 1st IF fi lter 5-1 RECEIVER CIRCUITS (FI1) to filter-out adjacent signals, then applied to the 1st IF 5-1-1 ANTENNA SWITCHING CIRCUIT (PA UNIT) amplifi er (Q7). The amplifi ed 1st IF signal is then applied to the The antenna switching circuit toggles the receive (RX) line and FM IF IC (IC9, pin 16). transmit (TX) line. The received signals from the antenna are passed through the 5-1-4 2nd IF AND DEMODULATOR CIRCUI
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The AF signals from the analog switch (IC3, pin 11) are 5-2 TRANSMITTER CIRCUITS applied to the volume buffer amplifi er (IC6, pin 9). The buffer- 5-2-1 MICROPHONE AMPLIFIER CIRCUITS amplified AF signals are adjusted its level (= audio level) (MAIN UNIT) by volume control pot (R315), then applied to the AF power The AF signals from the microphone (MIC signals) are fi ltered amplifier (IC15, pin 4) and amplified to the 0.5 W of audio and level-adjusted at microphone amplifi er circuits. outpu
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5-2-3 TRANSMIT AMPLIFIERS (PA UNIT) 5-2-4 APC CIRCUIT (PA UNIT) The transmit signal from the VCO is amplifi ed to the transmit The APC (Automatic Power Control) circuit prevents the output level by the transmit amplifi ers. transition of the transmit output power level which is caused by load mismatching or heat effect, etc. The transmit signal from the TX/RX switches (MAIN UNIT; D16 is ON, D17 is OFF) is amplifi ed by the pre-drive amplifi er A portion of transmit signal is detected by the trans
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5-3-2 PLL IC (MAIN UNIT) 5-3 PLL CIRCUITS The PLL circuit provides stable oscillation of the transmit 5-3-1 VOLTAGE CONTROLLED OSCILLATORS frequency and receive 1st LO frequency. The PLL output (VCOs; MAIN UNIT) frequency is controlled by the divided ratio (N-data) from the VCO is an oscillator whose oscillating frequency is controlled CPU. by adding voltage (lock voltage). The VCO output signal from the LPF (L34, L36, C202–C204) is This transceiver has 2 VCOs RX VCO (Q17, D9, D11, D33)
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5-4 POWER SUPPLY CIRCUITS Voltage from the attached battery pack is routed to whole of the circuit in the transceiver via a switch and regulators. Power switch F701 (PA unit ) VCC Drive amplifier (Q702), Power amplifier (Q701), etc. IC17 CPU (IC22), CPU5 CPU5V EEPROM (IC10), regurator Reset IC (IC8), etc. R315 Battery pack LED backlight driver (Q45), +5V +5V LCD driver (IC20), “PWON” regurator D/A converter (IC12), etc. Q26–Q28 Q23 S5V S5V PLL IC (IC2), 8 regurator “S5C” VCO’s, etc. 22 Q24, Q49
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5-5 PORT ALLOCATIONS Pin Port Description No. Name 5-5-1 CPU (IC22) Outputs Analog/Digital select signal to the A/D Pin Port Description 89 DIGI switch (D2, D3). No. Name “High”=Digital mode is selected. KR1− 1−3 Input ports for dealer-programmable keys. 91 LSO Outputs serial data to the LCD driver (IC20, pin 48). KR3 92 LSCK Outputs clock signal to the LCD driver (IC20, pin 47). KS0− 4−8 Output ports for dealer-programmable keys. Outputs chip-enable signal to the LCD driver (IC20, KS4 93 LCS
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SECTION 6 ADJUSTMENT PROCEDURES 6-1 PREPARATION When adjusting IC-F3020 series, CS-F3020 CLONING SOFTWARE, CS-F3020 ADJ ADJUSTMENT SOFTWARE (Rev. 1.0 or later), OPC-478/U JIG CABLE (modifi ed OPC-478/U CLONING CABLE; see the page 6-2) and the following test equipments are required. EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output voltage : 7.2 V DC Input impedance : 8 Ω External speaker DC power supply Capacity : 1 W or more Current capacity : More than 1.5 A Frequency ra
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CONNECTION Attenuator FM Osciiloscope 10 dB or 20 dB deviation meter Standard signal generator 0.1 µV to 32 mV RF power meter (–127 dBm to –17 dBm) 0.1–10 W/50 CAUTION! Frequency DO NOT transmit while counter the SSG is connected to OPC-478 (RS-232C type) the antenna connector to RS-232C port OPC-478U (USB type) to USB port AC millivoltmeter Audio generator PC + To [MIC] jack JIG cable 1 SINAD meter To [SP] jack JIG cable 2 Speaker (8 ) IC-F3020 series JIG CABLES [JIG cable 1] ) “ (GND) J
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PC SCREEN EXSAMPLE !6 !5 Tq w e r t y u i o !0 !1 !2 !3 !4 q Transmit output power (Hi) o Reference frequency Receive sensitivity (Automatically) w Transmit output power (L2) !0 Receive sensitivity (Manually) e Transmit output power (L1) !1 Modulation balance r !2 PLL lock voltage t FM deviation (Narrow) !3 PLL lock voltage preset y FM deviation (Middle*/Wide) !4 S-meter u CTCSS/DTCS deviation !5 PLL lock voltage (verify) Reload data i Squelch !6 *; [EUR] only 6 - 3
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6-2 FREQUENCY ADJUSTMENT Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC’s keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT OPERATION PLL LOCK 1 • Channel : CH 1 PC Click [Reload (F5)] button, then 3.5 V VOLTAGE • Receiving screen check the “LVIN” item on the [RX LVA] CS-F3020 ADJ’s screen as below. [TX LVA] 2 • Channel : CH 1 • Transmitting The “PLL LOCK VOLTAGE” can be adjusted automatically. CONVENIEN
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6-3 TRANSMIT ADJUSTMENT Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC’s keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT OPERATION OUTPUT 1 • Channel : CH 3 Top Connect an RF power meter to 5.0 W POWER • Transmitting panel the antenna connector. [Power (Hi)] [Power (L2)] 2 • Channel : CH 4 2.0 W • Transmitting [Power (L1)] 3 • Channel : CH 5 1.0 W • Transmitting MODULATION 1 • Channel : CH 6 Top Connec
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6-4 RECEIVE ADJUSTMENT Select an adjustment item using [↑] / [↓] keys, then set to the specifi ed value using [←] / [→] keys on the connected PC’s keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION RECEIVE NOTE: “RECEIVE SENSITIVITY” must be adjusted before “S-METER.” Otherwise, “S-METER” will not be SENSITIVITY adjusted properly. [BPF (T1)] 1 • Channel : CH 2 [MIC/SP] Connect the SINAD meter Minimum distortion [BPF (T2)] jack with an 8 Ω load to the JIG lev
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SECTION 7 PARTS LIST [MAIN UNIT] [MAIN UNIT] REF ORDER H/V REF ORDER H/V DESCRIPTION M. DESCRIPTION M. NO. NO. LOCATION NO. NO. LOCATION IC2 1140005991 S.IC MB15A02PFV1-G-BND-ERE1 T 81.2/34.5 L13 6200007850 S.COL ELJNC R82K-F T 88.7/26.1 IC3 1130011770 S.IC CD4066BPWR B 40.4/22 L21 6200011031 S.COL ELJRF R10JFB B 80.2/23 IC5 1110005320 S.IC NJM13403V-TE1 B 40.4/12.8 L22 6200011031 S.COL ELJRF R10JFB B 77.8/28.2 IC6 1110006350 S.IC LM2902PWR B 55.4/28.7 L24 6200003640 S.COL MLF1
