Icom iF110 Service Manual
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Icom iF110 Service Manual

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SERVICE
MANUAL
VHF TRANSCEIVER
iF110
iF111
iF121

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Summary of Contents for Icom iF110

  • Page 1 SERVICE MANUAL VHF TRANSCEIVER iF110 iF111 iF121...
  • Page 2 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-F110, F111 and F121 VHF TRANSCEIVER at the power supply that uses more than 16 V. This will ruin the transceiver.

  • Page 3: Table Of Contents

    EXPLICIT DEFINITIONS FREQUENCY COVERAGE CHANNEL SPACING 136 – 174 MHz 12.5 kHz/ 25.0 kHz Narrow/Wide-type 15.0 kHz/ 30.0 kHz Narrow/Middle-type 12.5 kHz/ 20.0 kHz TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEW SECTION 3 DISASSEMBLY INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPTION 4 - 1 RECEIVER CIRCUITS .
  • Page 4 SECTION 1 SPECIFICATIONS [GEN], [USA] [EUR] Measurement method EIA-152-C/204D or TIA-603 ETS 300 086 Frequency coverage 136.000–174.000 MHz N/W: (12.5 kHz; Narrow/25 kHz; Wide): 8K50F3E/16K0F3E [EUR] (12.5 kHz; Narrow/25 kHz; Wide): 11K0F3E/16K0F3E [GEN] Type of emission (15 kHz; Narrow/30 kHz; Wide): 11K0F3E/16K0F3E [USA] N/M (12.5 kHz;...
  • Page 5 SECTION 2 INSIDE VIEW Final FET module (IC3: S-AV33) Antenna switch/ CPU 5V regurator* Low-pass filter circuit (IC10: AN78L05M) 8V regurator Mixer* (IC9: TA7808F) (Q3: 3SK299) 2nd IF filter* (FI2: ALFYM450F=K) VCO circuit D/A converter* (IC6: M62363FP-650C) AF amplifier (IC8: LA4425A) Reference crystal oscillator* IF IC (IC1: TA31136FN)

  • Page 6: Front Unit

    SECTION 3 DISASSEMBLY INSTRUCTIONS • Opening case Lift up the front portion of the main unit and remove it. Unscrew 4 screws A, and remove the bottom cover. Disconnect the flat cable B from J2. Disconnect the cable C from J7. Unscrew 2 screws D, and remove the front unit.

  • Page 7: Main Unit

    SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS 4-1-3 1ST MIXER AND 1ST IF CIRCUITS (MAIN UNIT) 4-1-1 ANTENNA SWITCHING CIRCUIT The 1st mixer circuit converts the received signals to a fixed (MAIN UNIT) frequency of the 1st IF signal with the PLL output frequency. The antenna switching circuit functions as a low-pass filter By changing the PLL frequency, only the desired frequency while receiving and as resonator circuit while transmitting.

  • Page 8: Transmitter Circuits

    4-1-5 AF AMPLIFIER CIRCUIT (MAIN UNIT) 4-2 TRANSMITTER CIRCUITS The AF amplifier circuit amplifies the demodulated AF sig- 4-2-1 MICROPHONE AMPLIFIER CIRCUIT nals to drive a speaker. (MAIN AND FRONT UNITS) The microphone amplifier circuit amplifies audio signals The AF signals from the FM IF IC (IC1, pin 9) are applied to within +6 dB/octave pre-emphasis characteristics from the the active filter circuit (IC16).

  • Page 9: Pll Circuits

    4-2-4 POWER AMPLIFIER CIRCUIT (MAIN UNIT) 4-3 PLL CIRCUITS The power amplifier circuit amplifies the driver signal to an 4-3-1 PLL CIRCUIT (MAIN UNIT) output power level. A PLL circuit provides stable oscillation of the transmit fre- quency and receive 1st LO frequency. The PLL output com- The RF signal from the drive amplifier (Q8) is passed pares the phase of the divided VCO frequency to the refer- through the low-pass filter circuit (L18, L43, C89, C90, C92,...

  • Page 10: Power Supply Circuits

    4-4 POWER SUPPLY CIRCUITS 4-5 PORT ALLOCATIONS 4-4-1 VOLTAGE LINES (MAIN UNIT) 4-5-1 CPU (FRONT UNIT; IC1) Description Line Port Description number name The voltage from a DC power supply. TEMP Input port for the internal temperature. The same voltage as the HV line which is con- Input port for the low voltage detection trolled by the power switching circuit (Q23, Q24).
  • Page 11 CPU-Continued 4-5-2 OUTPUT EXPANDER (MAIN UNIT; IC17) Port Description Port number name Description number name OPT3– I/O ports for the optional board control Outputs transmit/receive control signal. 44–46 OPT1 signals. High: While receiving. Input port for the clock sigal from the Outputs audio output control signal.

  • Page 12: Adjustment Procedures

    SECTION 5 ADJUSTMENT PROCEDURES I ADJUSTMENT SOFTWARE INSTALLATION 5-1 PREPARATION q Boot up Windows. When you adjust the contents on pages 5-5 and 5-6, SOFT- - Quit all applications when Windows is running. WARE ADJUSTMENT, the optional CS-F100 ADJ ADJUST- w Insert the ‘CS-F100’...
  • Page 13 I REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output voltage : 13.2 V DC Frequency range : 300–3000 Hz DC power supply Audio generator Current capacity : 15 A or more Measuring range : 1–500 mV Measuring range : 1–100 W Frequency range...
  • Page 14 • SCREEN DISPLAY EXAMPLE CS-F100 ADJ Rev.1.0 File Option COM 1: OPEN Connect Reload (F5) Disp para [A / D] [D / A] : 178 : B2h : 19.96 V BPF T1 : 197 : 32h : 0.98 V TEMPS : 177 : B1h : 26.44 ’C T2/POW : 172 : 32h : 0.98 V LVIN...

  • Page 15: Pll Adjustment

    5-2 PLL ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST PLL LOCK • Operating freq. : 174.000 MHz MAIN Connect a digital multi- 3.2 V MAIN C134 VOLTAGE • Receiving meter or an oscillo- scope to the check point, “LV”.

  • Page 16: Software Adjustment

    5-3 SOFTWARE ADJUSTMENT Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION REFERENCE • Operating freq. : 174.000 MHz Rear Loosely couple a frequnecy 174.0000 MHz FREQUENCY...
  • Page 17 SOFTWARE ADJUSTMENT – continued Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION • Operating freq. : 136.000 MHz MAIN Connect a SINAD meter with a Minimum distortion 4 Ω...

  • Page 18: Front Unit

    SECTION 6 PARTS LIST [FRONT UNIT] [FRONT UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1140011260 S.IC HD6433687A11FP (FX-2622A) 7030005090 S.RESISTOR ERJ2GEJ 104 X (100 kΩ) 1110005770 S.IC S-80942CNMC-G9C-T2 7030005120 S.RESISTOR ERJ2GEJ 102 X (1 kΩ) 1140008650 S.IC HN58X2464TI 7030005050 S.RESISTOR ERJ2GEJ 103 X (10 kΩ) 1110005340 S.IC NJM12902V-TE1 7030005050 S.RESISTOR...
  • Page 19 [FRONT UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 6450002210 CONNECTOR 3017-8821 <KIN> 1530003090 S.TRANSISTOR 2SC4213-B (TE85R) 6510022470 S.CONNECTOR 40FLT-SM1-TB 1790001210 S.DIODE 1SS375-TL 5040002310 S.LED SML-311YTT86 1750000510 S.DIODE UM9401F only 5040002310 S.LED SML-311YTT86 1710001060 DIODE XB15A407 only 5040002310 S.LED SML-311YTT86 1750000720 S.VARICAP HVC375BTRF 5040002310 S.LED SML-311YTT86...
  • Page 20 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 101 V (100 Ω) 6200003640 S.COIL MLF1608E 100K-T 7030003320 S.RESISTOR ERJ3GEYJ 101 V (100 Ω) 6200009460 S.COIL 0.25-1.9-7TL 67N 7030003320 S.RESISTOR ERJ3GEYJ 101 V (100 Ω) 6200008150 S.COIL 0.35-1.6-7TL 44N 7030003320 S.RESISTOR 6200009160 S.COIL ELJRE 68NJ-F3 7030003690 S.RESISTOR...
  • Page 21 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R195 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) R319 7030003590 S.RESISTOR ERJ3GEYJ 183 V (18 kΩ) R196 7030003600 S.RESISTOR ERJ3GEYJ 223 V (22 kΩ) R320 7030003760 S.RESISTOR ERJ3GEYJ 474 V (470 kΩ) R197 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ)
  • Page 22 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030007040 S.CERAMIC C1608 CH 1H 180J-T C124 4030011280 S.CERAMIC C1608 CH 1H 271J-T 4030006860 S.CERAMIC C1608 JB 1H 102K-T C126 4030007070 S.CERAMIC C1608 CH 1H 330J-T 4030006860 S.CERAMIC C1608 JB 1H 102K-T C127 4030007030 S.CERAMIC C1608 CH 1H 150J-T...
  • Page 23 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C264 4030011600 S.CERAMIC C1608 JB 1E 104K-T C380 4030007050 S.CERAMIC C1608 CH 1H 220J-T C265 4510008030 S.ELECTROLYTIC ECEV1EA471P 4030007040 S.CERAMIC C1608 CH 1H 180J-T C266 4510004630 S.ELECTROLYTIC ECEV1CA100SR C381 4030007050 S.CERAMIC C1608 CH 1H 220J-T C268 4550006700 S.TANTALUM ECST1AY106R...
  • Page 24 SECTION 7 MECHANICAL PARTS AND DISASSEMBLY [CHASSIS PARTS] [ACCESSORIES] REF. ORDER REF. ORDER DESCRIPTION QTY. DESCRIPTION QTY. 6510004880 Connector MR-DS-E 01 0800005780 Microphone HM-100N 8010019060 2601 chassis 8900011780 Cable OPC-1194 8110007820 2601 cover 8900000730 Cable OPC-049 8210019340 2622 front panel 8930059010 2622 keyboard 8010019170...
  • Page 25 MP10 (C) MP15 (C) J1 (C) W2 (M) MP1 (C) MP10 (M) J4 (M) MP1 (M) MP9 (M) MAIN UNIT MP7 (M) MP13 (C) MP9 (C) MP11 (C) R14 (F) MP4 (M) MP5 (M) W1 (F) MP9 (C) J1 (F) MP6 (M) MP12 (C) MP6 (C)
  • Page 26 SECTION 8 SEMI-CONDUCTOR INFORMATION • TRANSSISTORS AND FET’S • DIODES 2SA1577 T106 Q 2SC3356 T1B R25 2SC4116 BL 2SC4213 B 2SC4215 O 1SS375-TL 1SV239 1SV307 DA221 TL DAN222TL (Symbol: HQ) (Symbol: R25) (Symbol: LL) (Symbol: AB) (Symbol: QO) (Symbol: FH) (Symbol: TC) (Symbol: TX) (Symbol: K)
  • Page 27 SECTION 9 BOARD LAYOUTS 9-1 FRONT UNIT • TOP VIEW Microphone 9 - 1...
  • Page 28 • BOTTOM VIEW (FRONT UNIT) to MAIN unit J2 9 - 2...
  • Page 29 9-2 MAIN UNIT • TOP VIEW CHASSIS to DC cable speaker HORN DISC to Optional cable OPC-617 to Optional unit to FRONT unit J2 9 - 3...
  • Page 30 • BOTTOM VIEW (MAIN UNIT) 9 - 4...
  • Page 31 SECTION 10 BLOCK DIAGRAM 136-174 MHz Q15 XP1214 RX VCO 2SC4116 Q16 DTC144EU 2SK880 2SC4226 D33, D34 HVC376B CR-740 LVIN RIPPLE BUFF D2 UM9401F [25W] D3 XB15A407 [50W] D5 UM9401F D6 MA77 D14, D15 S-AV33 [25W] D1, D11 MB15A02PFV-1 MA77 D48 1SV307 1SS375 HVC362...
  • Page 32 SECTION 11 VOLTAGE DIAGRAMS 11-1 FRONT UNIT DS11 FRONT UNIT L2-0607TAY 5.0V R51 100k PWON MA2S111 OPT1 OPT2 CPU5V 5.0V C79 0.1 COM3 SEG22 COM3 COM4 SEG21 COM4 SEG20 S-80942CNMC-G9C 5.0V TEMP P86/AN6 P70/SCK3_2 SEG19 BATV VLCD P87/AN7 SEG18 OPT2 VLCD1 AVCC P22/TXD...

  • Page 33: Main Unit

    11-2 MAIN UNIT MAIN UNIT (1) 5.0V R110 2SC4116 2SK880 R220 C161 CR-740 6.9V 100p 3.9k 1.8k R266 OV12 2SC4215 R221 C200 C127 C126 OV12 R267 OV12 DAST R268 DAST R210 C113 CIRQ CIRQ 100K 2SC4226 C163 R222 0.75p TX: 4.3V 3.3µ...
  • Page 34 MAIN UNIT (2) MEASUREMENT CONDITIONS VOLTMETER Amplitude(Oscilloscope) : 100 MHz Frequency : 155 MHz Transmission : 25 W 6.0V TX: 6.9V RX: 0V S-AV33 [25W] S-AV32 [50W] 6.4V XB15A407[50W] AS080547-47N 1 2 3 4 TX: 2.9V C102 C100 C510 UM9401F RX: 0V AS080547-47N [25W]...
  • Page 36 S-13911HZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan C 2003 Icom Inc.

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