Icom IC-F5121D Service Manual
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Icom IC-F5121D Service Manual

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VHF MOBILE TRANSCEIVERS
S-14713XZ-C1
Feb. 2011

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  • Page 1 VHF MOBILE TRANSCEIVERS S-14713XZ-C1 Feb. 2011...
  • Page 2 8. READ the instructions of the test equipment throughly 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.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION SPECIFICATIONS SECTION INSIDE VIEWS SECTION DISASSEMBLY INSTRUCTION SECTION OPTIONAL CABLE INSTALLATION SECTION CIRCUIT DESCRIPITON RECEIVER CIRCUITS............5-1 TRANSMITTER CIRCUITS .

  • Page 4: Specifications

    SECTION 1. SPECIFICATIONS GENERAL • Frequency range : 136–174 MHz • Number of conventional channels : 128 ch (8 zones) • Type of emission : [USA], [EXP] Wide 16K0F3E (25.0kHz) Narrow 11K0F3E (12.5kHz) Digital 8K10F1D/8F10F1E (12.5kHz) 4K00F1D/4F00F1E (6.25kHz) [EUR] Wide 16K0F3E (25.0kHz) Middle 14K0F3E (20.0kHz)
  • Page 5 RECEIVER • Sensitivity : [USA], [EXP] 0.25 µV typ. at 12 dB SINAD [EUR] –4 dBµV (EMF) typ. at 20 dB SINAD • Squelch sensitivity (at threshold) : [USA], [EXP] 0.25 µV typ. [EUR] –4 dBµV (EMF) typ. • Intermediate frequency : 1st IF;...

  • Page 6: Section 2 Inside Views

    SECTION 2. INSIDE VIEWS • FRONT UNIT EEPROM (IC52) CPU CLOCK (X51) CLOCK FREQUENCY SHIFT DIODE (D60) (IC51) LCD DRIVER (IC6) BACKLIGHT LED DRIVER (Q1) BACKLIGHT SW DIMMER CONTROLLER (Q5) (Q2) MIC AMP (IC7) MIC AMP FREQUENCY RESPONSE SW MIC GAIN SW (IC54) (IC53) 2 - 1...
  • Page 7 • MAIN UNIT (TOP VIEW) +8V LINE REGULATOR (IC1002) +3 LINE REGULATOR (Q1017) HV LINE SWITCH (Q1003) RIPPLE FILTER R8 LINE SW (Q2 ) (Q1013) VCO SW (Q10) 1ST IF FILTER (For digital mode) (FI5) 1ST IF FILTER (For analog mode) (FI4) APC AMP (IC2)
  • Page 8 • MAIN UNIT (BOTTOM VIEW) T8 LINE REGULATOR +5V LINE REGULATOR (Q1011) (Q1014) Analog/Digital AF LINE SW (IC1008) AF AMP (IC1004) +3V LINE REGULATOR (IC1001) DRIVE AMP (Q17) PLL IC (IC8) REFERENCE FREQUENCY 1ST IF MIXER OSCILLATOR (X2) (Q19) AF AMP 2ND IF FILTER (IC6) (For wide mode)

  • Page 9: Section 3 Disassembly Instruction

    SECTION 3. DISASSEMBLY INSTRUCTION 1) Remove 4 screws from the bottom cover, and then 5) Unsolder total of 7 points; 3 points at the antenna remove it. connector, 4 points at the PA module. 2) Disconnect the fl at cable and speaker cable. 3) Remove 2 screws from the both sides of the front panel, UNSOLDER and then remove it in the direction of the arrow.

  • Page 10: Section 4 Optional Cable Installation

    SECTION 4 OPTIONAL CABLE INSTALLATION Install optional OPC-1939/OPC-2078 as follows: 1) Turn OFF the power, and then disconnect the DC power cable. 2) Unscrew 4 screws, then remove the bottom cover. 3) Install the cable as shown. OPC-1939/OPC-2078 Cut off the bushing as in the illustration. 4) Cut or short the patterns as below.

  • Page 11: Receiver Circuits

    SECTION 5. CIRCUIT DESCRIPTION 2ND IF AND DEMODULATOR CIRCUITS 5-1 RECEIVER CIRCUITS The signal from the 1st IF circuits is applied to the IF demod- RF CIRCUITS ulator IC (IC4) which contains the 2nd IF mixer, 2nd IF AMP, The RX signal from the antenna is passed through the LPF FM detector, squelch circuit and AF AMP in its package.

  • Page 12: Transmitter Circuits

    RX AF CIRCUITS 5-2 TRANSMITTER CIRCUITS The demodulated AF signal from the linear codec (IC2006) TX AF CIRCUITS is amplified by the AF AMP (IC1007), and then adjusted in The audio signal from the microphone (MIC signal) is passed level by the electronic volume (IC1006). The level-adjusted through the MIC gain SW (IC53), and then applied to the MIC AF signal is then amplifi...

  • Page 13: Frequency Synthesizer Circuits

    MODULATION CIRCUIT 5-3 FREQUENCY SYNTHESIZER CIRCUITS The modulation signal from the TX AF circuits is applied to The RX VCO is composed of Q6, and D4, D5, D11. The D10 of the TX VCO (Q7, D6, D7, D10, D12) to modulate it VCO output signal is buffer-amplified by two buffers (Q12 (FM for the analog mode, 4FSK for the digital mode).

  • Page 14: Port Allocations

    5-5 PORT ALLOCATIONS • CPU (FRONT UNIT: IC51) BALL LINE BALL LINE DESCRIPTION DESCRIPTION NAME NAME LCD driver (IC6) chip [P1] input. Power supply switching control. PLL lock up time control. PLSW L= Fast lock up H= During receive or stand-by. TDAT Serial data to the DSP (IC2007).

  • Page 15: Section 6 Adjustment Procedure

    SECTION 6. ADJUSTMENT PROCEDURE 6-1 PREPARATION EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Cloning Software CS-F3100D/F5120D : Revision 1.0 or later JIG Cable Modifi ed OPC-1122U (see the illust below) Output voltage : 13.6 V DC except [EUR] Power attenuation : 50 or 60 dB DC Power Supply 13.2 V DC [EUR]...
  • Page 16 ¤ 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.”...
  • Page 17 ¤ ADJUSTMENT UTILITY ADJUSTMENT CONDITION TX OUTPUT POWER MODULATION BALANCE MODULATION BALANCE (PRESET) CTCSS DEVIATION DTCS DEVIATION SQUELCH REFERENCE FREQUENCY SENSITIVITY PLL LOCK VOLTAGE (RX) PLL LOCK VOLTAGE (TX) S-METER FM DEVIATION DIGITAL DEVIATION 2/5 TONE DEVIATION 6 - 3...

  • Page 18: Frequency Adjustment

    6-2 FREQUENCY ADJUSTMENTS 1) Select an adjustment item using [↑]/[↓] on the PC's keyboard. 2) Set or modify the adjustment value as specifi ed using [←]/[→] on the PC's keyboard, then push [ENTER]. TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE CONDITION ITEM PLL LOCK 1 •...

  • Page 19: Transmit Adjustment

    6-3 TRANSMIT ADJUSTMENTS 1) Select an adjustment item using [↑]/[↓] on the PC's keyboard. 2) Set or modify the adjustment value as specifi ed using [←]/[→] on the PC's keyboard, then push [ENTER]. TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE CONDITION ITEM TX POWER 1 •...
  • Page 20 6-3 TRANSMIT ADJUSTMENTS (continued) 1) Select an adjustment item using [↑]/[↓] on the PC's keyboard. 2) Set or modify the adjustment value as specifi ed using [←]/[→] on the PC's keyboard, then push [ENTER]. TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE CONDITION ITEM DIGITAL 1 •...

  • Page 21: Receive Adjustment

    6-4 RECEIVE ADJUSTMENTS 1) Select an adjustment item using [↑]/[↓] on the PC's keyboard. 2) Set or modify the adjustment value as specifi ed using [←]/[→] on the PC's keyboard, then push [ENTER]. TRANSCEIVER’S ADJUSTMENT ADJUSTMENT OPERATION VALUE CONDITION ITEM RX SENSITIVITY 1 NOTE: When "RX SENSITIVITY"...

  • Page 22: Parts List

    SECTION 7 PARTS LIST [MAIN UNIT] [MAIN UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1110002751 S.IC TA75S01F(TE85RF) 60/54.9 1750000370 S.DIO DA221 TL 33.7/37.1 1150002423 IC RA60H1317M1A-222 1750001820 S.DIO LRB706F-40T1G <SLVJ> 8.2/49.9 1110007320 S.IC NJM2591V-TE1-#ZZZB 57.8/24.7 1750000721 S.VAR HVC375BTRF-E 30.5/38.3 1110006230 S.IC NJM2711F-TE1-#ZZZB 36.0/26.9 D1002...
  • Page 23 [MAIN UNIT] [MAIN UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 7030005050 S.RES ERJ2GEJ 103 X (10K) 31.9/35.5 R334 7030005000 S.RES ERJ2GEJ 471 X (470) 90.7/63.2 7030005700 S.RES ERJ2GEJ 274 X (270K) 39.2/38.6 R337 7030010040 S.RES ERJ2GEJ-JPW 84.1/63.7 7030008280 S.RES ERJ2GEJ 271 X (270) 39.5/40.7 R338 7030005000 S.RES ERJ2GEJ 471 X (470)
  • Page 24 [MAIN UNIT] [MAIN UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION R1082 7410001130 S.ARR EXB28V102JX 56.9/6.7 4030017400 S.CER C1005 CH 1H 220J-T 24.3/51.2 R1083 7030005120 S.RES ERJ2GEJ 102 X (1K) 69.1/8.8 4030017600 S.CER C1005 CH 1H 080C-T 24.3/48.3 R1084 7410001130 S.ARR EXB28V102JX 61.7/6.1 4030017580 S.CER C1005 CH 1H 060C-T 22.3/44.8...
  • Page 25 [MAIN UNIT] [MAIN UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION C123 4030017420 S.CER C1005 CH 1H 470J-T 105.0/29.2 C404 4030011180 S.CER GRM31M2C2H220JV01L C124 4030017440 S.CER C1005 CH 1H 221J-T 106.0/26.2 (GRM42-6 CH) 20.4/58.7 C126 4030017390 S.CER C1005 CH 1H 180J-T 97.9/25.3 C408 4030017460 S.CER C1005 JB 1H 102K-T...
  • Page 26 [MAIN UNIT] [MAIN UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION C1070 4030017440 S.CER C1005 CH 1H 221J-T 120.4/16.2 S1001 2260003180 S.SWI MINISMDC050F-2 CN 114.1/33.8 C1071 4030016930 S.CER C1005 JB 1A 104K-T 120.4/10.8 C1074 4030017460 S.CER C1005 JB 1H 102K-T 73.9/10.4 C1075 4030017460 S.CER C1005 JB 1H 102K-T 70.7/14.4...
  • Page 27 [FRONT UNIT] [FRONT UNIT] PARTS PARTS DESCRIPTION DESCRIPTION LOCATION LOCATION 1130015530 S.IC BU9795AKV-E2 43.0/21.2 4030017460 S.CER C1005 JB 1H 102K-T 18.3/13.1 1110002751 S.IC TA75S01F(TE85RF) 28.3/24.7 4030016790 S.CER C1005 JB 1E 103K-T 26.9/28.9 IC51 1140015010 S.IC HD64F2506RBR26DV(EMPTY) 67.5/21.9 4030016930 S.CER C1005 JB 1A 104K-T 23.0/26.4 IC52 1130015080 S.IC...
  • Page 28 SECTION 8. MECHANICAL PARTS [CHASSIS PARTS] [ACCESSORIES] ORDER ORDER DESCRIPTION QTY. DESCRIPTION QTY. 6510004880 MR-DS-E 01 <SSC> (Optional) HM-152 8900011800 OPC-1199 (Optional) OPC-1194A [EUR-01] 8010019065 2601 CHASSIS-5 [EUR-01] (Optional) OPC-1194A [EXP-01] 8010019065 2601 CHASSIS-5 [EXP-01] (Optional) OPC-1132A [USA-01] 8010019135 2601 LONG CHASSIS-5 [USA-01] (Optional) OPC-1132A...
  • Page 29 MP1 (C) [50 W version] MP1 (C) [25 W version] MP8 (C) MP4 (C) ×2 J1 (C) MP9 (M) MP6 (M) MP11 (C) J1002 (M) MP8 (C) MP2 (M) W2 (M) IC3 (M) MAIN UNIT MP3 (M) IC8 (M) MP5 (C) ×2 MP6 (C) MP3 (F) MP3 (C)
  • Page 30 The combination of top side and bottom side of this SECTION 9. BOARD LAYOUTS • FRONT UNIT (TOP VIEW) 9 - 1...
  • Page 31 The combination of top side and bottom side of this • FRONT UNIT (BOTTOM VIEW) CRES R652 R765 PGIO3 R780 R779 C805 -IPTT R773 R781 C810 CPU3.3V AFVI C132 BEEP C803 R637 CPU3.3V R638 PGIO2 R782 C799 R688 IC53 C804 MICI AFVI C797...
  • Page 32 The combination of top side and bottom side of this • MAIN UNIT AF GND (TOP VIEW) AF OUT ANT CONNECTOR J1002 J1 (CHASSIS) C471 C364 C372 C342 C401 R338 C1003 R334 C411 C473 R1104 -TMUT R1105 C1017 C472 -T8V C1036 C1059 IC1002...
  • Page 33 The combination of top side and bottom side of this • MAIN UNIT (BOTTOM VIEW) [Ext. SP JACK] C468 C402 C469 C1025 C456 C1024 C380 C1023 C381 C460 R387 C458 C459 C461 R388 D1002 R386 R385 C409 -T8V C457 R393 R1026 Q1011 R1025...
  • Page 34 SECTION 10. BLOCK DIAGRAM Q10:XP1214 2SC4116 Q 8:LDTC114YE 136-174MHz RIPPLE 2SK880 RX VCO Q6:2SC4226 D24:RN752 LVIN D 11:HVC375B D4:HVC376B D25:HVD142A BUFF to CPU D5:HVC376B D26:HVD142A RA30H1317M1A(25 W ver.) RLVA D15,D16 D28:RN752 RA60H1317M1A(50 W ver.) AD J 2SC5006 2SC5006 HVD142A 2SC3357 D32:HVD142A CR-892 AK1541...
  • Page 35 SECTION 11. VOLTAGE DIAGRAM • FRONT UNIT R774 DS11 TAK-35877 R773 LNJ426W83RA DSIRQ DMISO I GSW LNJ426W83RA LNJ426W83RA R772 CPU3.3V EXB28V102J LNJ426W83RA LNJ426W83RA DIM ON 6.3V LIGHT ON 3.2V DIM OFF 7.3V LNJ426W83RA 100K LDTC114YE LIGHT OFF 0.0V 3.2V 1.2K LIGT2 CL I HANG...
  • Page 36 • MAIN UNIT (1/3) 8.0V 7.1V 2SC4116 TX 3.0V MP 1 3.9K 1.8K RX VCO RX 0.0V RDS2T0R0 R339 LP F C127 C126 C6342A TX 6.7V AS080547-47N AS080547-47N AS080547-47N AS080547-47N RX 0.0V RN752 0.001 2SC4226 C113 NLV25T 0.5P +3.3V GND4 +3.3V ELJNC 0.001...
  • Page 37 • MAIN UNIT (2/3) R1111 R1076 R1032 R1046 100K AF PRE AMP 2.2K R1086 R1074 Q1008 560K 150K R1023 D1007 DTC363EK 3.3V L1SS400 C1070 IC1007 220P Q1012 NJM13403V LDTC114YE R1008 R1077 VCON R1055 +3.3V + 3.3 V 100K H:AFON L:MUTE C1081 C1082 R1057...
  • Page 38 • MAIN UNIT (3/3) C2073 3.3V C2009 CP2006 R2016 NFM18PC104R1C3 DVDD_3.3V CVDD_1.6V EP2001 MMZ1005S601CT AGND +3.3V_A R2019 R2049 R2020 100K 1.5V DVDD_3.3V CLKO IC2001 L2001 CP2001 TPS62204DBVR L2003 VLCF4028T-100M1R0-2 ELJFC GPIO13 PWADN PWDAN CP11 6 N1 3 R2013 RDATA R2056 BDX0 EMU0 R2057...
  • Page 39 Highway 17 Delta, B.C., V4K 5B8, Canada : http://www.icomspain.com Phone : +1 (604) 952-4266 Fax : +1 (604) 952-0090 E-mail : icom@icomspain.com : http://www.icomcanada.com E-mail : info@icomcanada.com Blacksole House, The Boulevard, Altira Business Park, Herne Bay, CT6 6GZ, UK Phone : +44 (01227) 741741...
  • Page 40 S-14713XZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan © 2011 Icom Inc.

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