Service Manual

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SERVICE

MANUAL

VHF/UHF DUALBAND FM TRANSCEIVER

S-14217HZ-C1

Nov. 2005

Summary of content (35 pages)

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SERVICE MANUAL VHF/UHF DUALBAND FM TRANSCEIVER S-14217HZ-C1 Nov.
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INTRODUCTION This service manual describes the latest service information for the IC-E7 VHF/UHF DUALBAND FM TRANSCEIVER at the time of publication. MODEL IC-E7 VERSION Europe Italy France United Kingdom SYMBOL EUR ITR FRA UK To upgrade quality, all electrical or mechanical parts and internal circuits are subject to change without notice or obligation. DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply 3.7 V. Such a connection could cause a fire or electric hazard.
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TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPITON 4-1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1 4-2 TRANSMITTER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 2 4-3 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . .
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SECTION 1 SPECIFICATIONS RECEIVER GENERAL • Frequency range • Receiving system : Double conversion superheterodyne system • Intermediate frequencies : FM, AM 1st; 46.35 MHz 2nd; 450 kHz WFM 1st; 14.85 MHz 2nd; 450 kHz • Sensitivity* : : Version Transmit (MHz) [EUR], [UK] 144.000–146.000 430.000–440.000 144.000–146.000 430.000–434.000 435.000–438.000 [ITR] [FRA] 146.000–146.000 430.000–440.000 Receive (MHz) 0.495–999.990 144.000–146.000 430.000–434.000 435.000–438.000 0.495–29.995 50.200–51.
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SECTION 2 INSIDE VIEWS • MAIN UNIT (TOP VIEW) Reference frequency generator oscillator (X1: CR-813 CR-813 7.325 7.
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SECTION 3 DISASSEMBLY INSTRUCTIONS • Removing the chassis • Removing the MAIN unit and PA board 1 2 3 4 1 Unscrew 2 screws A, then remove the LCD panel B. 2 Unscrew 5 screws C and dial nut D. 3 Unsolder 2 points E. Remove the battery pack. Remove the jack cap A and unscrew the antenna nut B. Remove the dial knob C. Unscrew 2 screws D and lift up the chassis in the direction of the arrow.
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SECTION 4 CIRCUIT DESCRIPTION • While receiving 500–999 MHz The 500–999 MHz band signals are passed through the HPF (L41, C311, C313) and band switch (D54), then applied to the RF amplifier (Q45) via the attenuator (D46). The amplified RF signals are applied to another RF amplifier (Q39) via the BPF (D33, D40, L15, L27, L28, C229, C237, C245, C252, C261). The amplified RF signals are then applied to the 1st mixer (IC16, pin 1) via the band switch (D23).
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The amplified AF signals are applied to the electric volume (IC7, pin 11) and level adjusted. The level adjusted AF signals are output from pin 12, and applied to the AF amplifier (IC9, pin 2) to obtain more than 50 mW of AF output power. The power amplified AF signals are then output from pin 6, and applied to the internal speaker (CHASSIS; SP1) or connected external speaker via [MIC/SP] connector (J4).
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The amplified noise components are converted into the pulse-type signal at the noise detector section, and output from pin 13 as the “NOISE” signal. The “NOISE” signal is applied to the CPU (IC4, pin 47). Then the CPU outputs “AFON” signal from pin 68 according to the “NOISE” signal level to toggle the AF power regulator (Q46, Q47) ON and OFF.
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If the receiving frequency is 500 MHz and above, the bufferamplified signals are applied to the doubler circuit (Q18, D14, D15) via doubler switch (D12). The doubled signals are then applied to the 1st mixer (IC16, pin 3) via doubler switch (D16) and TX/RX switch (MAIN UNIT; D56). 4-3 PLL CIRCUITS 4-3-1 VCO CIRCUITS (VCO BOARD) This transceiver has 3 VCOs; 50 MHz VCO, 144 MHz VCO and 430 MHz VCO.
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4-4 PORT ALLOCATIONS Pin No. 4-4-1 CPU (MAIN UNIT; IC4) Pin No. Port Name 2 K2 3 K1 Input port for [BAND], [CALL] and [V/M] keys. 4 RSSI Input port for RSSI signal for the S-meter indicator from FM IF IC (IC15, pin 12). 5 VIN Input port for volatage detection of attached battery pack. 6 CTONE Input port for WX signal. 7 RTONE Input port for CTCSS/DTCS signal. 14 ESIO I/O port for EEPROM (IC1) data. 15 ECK I/O port for the EEPROM (IC1) clock.
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4-4-1 CPU (MAIN UNIT; IC4)-continue Pin No. Port Name 75 SQL 76 FUNC 77 PTT 138 PSET Outputs transmit power control signal to the TX power controller (IC17. pin 3). 139 TRAC Outputs BPFs tracking control signal to the tracking varactor diodes driver (Q32). 4-5 POWER SUPPLY CIRCUITS Line Description VCC Input port for [SQL] key (S7). "Low": While [SQL] is pushed. TEMP Input port for [FUNC] key (PA BOARD; S1). "Low": While [FUNC] is pushed. Input port for [PTT] key.
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SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION When adjusting IC-E7, these test equipments and the JIG cable (see the illust below) are required. ¤ REQUIRED TEST EQUIPMENTS EQUIPMENT GRADE AND RANGE RF power meter (terminated type) Measuring range Frequency range Impedance SWR Frequency counter FM deviation meter Audio generator : 0.1–3 W : 100–500 MHz : 50 Ω : Less than 1.2 : 1 EQUIPMENT GRADE AND RANGE Standard signal generator (SSG) Frequency range : 0.1–1300 MHz Output level : 0.
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¤ ENTERING ADJUSTMENT MODE ¤ KEY ASSIGNMENTS FOR ADJUSTMENT MODE q Turn the power OFF. w Connect the JIG cable (see page 5-1) to the [MIC/SP] jack. e Turn the "S1" of the JIG cable ON. r While pushing [FUNC], [BAND] and [Y] key, turn the power ON. t Turn the "S1" of the JIG cable OFF, then start the adjust ment. During adjustment mode, the function dispaly shows the adjustment item, frequency, etc. as below. &- • !DJUSTMENT FREQUENCY 3#!. : Selects the next adjustment item.
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5-2 FREQUENCY AND TRANSMIT ADJUSTMENT • Set the specified value using [DIAL], and push [BAND] to store the set value. Then push [CALL] to move to the next adjustment item. NOTE: "REFERENCE FREQUENCY" should be adjusted before "DEVIATION" and "RX SENSITIVITY," and "DEVIATION" should be adjusted before "DTCS BALANCE" (on the next page). Otherwise, these adjustments will not be adjusted properly.
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5-3 SIGNALING AND RECEIVE ADJUSTMENT • Set the specified value using [DIAL], and push [BAND] to store the set value. Then, push [CALL] to move to the next adjustment item. NOTE: "DTCS BALANCE" should be adjusted before "CTCSS DEVIATION," and "RX SENSITIVITY" should be adjusted before "FM/WFM S-METER" (on the next page). Otherwise, these adjustments will not be adjusted properly.
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• RECEIVE ADJUSTMENT (continued) ADJUSTMENT ITEM [t44] ADJUSTMENT CONDITION 13 • Set the SSG as; Frequency : Specified frequency* • Receiving [t54] 14 • Set the SSG as; Frequency : Specified frequency* • Receiving [t64] 15 • Set the SSG as; Frequency : Specified frequency* • Receiving [t15] 16 • Set the SSG as; Frequency : Specified frequency* • Receiving [t25] 17 • Set the SSG as; Frequency : Specified frequency* • Receiving [t35] 18 • Set the SSG as; Frequency : Specified frequency* • Receivin
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SECTION 6 PARTS LIST • IC-E7 [MAIN UNIT] [MAIN UNIT] REF NO. IC1 IC2 ORDER NO. REF NO. H/V M. LOCATION DESCRIPTION IC5 IC7 IC8 IC9 IC10 IC11 IC12 IC13 IC14 IC15 1130012690 1110006720 1140013010 1110006380 1130011860 1110006470 1110002810 1180002371 1180002371 1130007111 1190001830 1130004201 1110003201 S.IC S.IC S.IC S.IC S.IC S.IC S.IC S.REG S.REG S.IC S.IC S.IC S.IC IC16 IC17 IC18 IC19 IC22 1110005230 1110006490 1130012980 1130007021 1130009581 S.IC S.IC S.IC S.IC S.
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[MAIN UNIT] [MAIN UNIT] REF NO. ORDER NO. DESCRIPTION REF NO. H/V M. LOCATION L44 L101 L102 L103 L104 L105 L106 6200006981 6200003640 6200004480 6200005560 6200009270 6200003640 6200011590 S.COL S.COL S.COL S.COL S.COL S.COL S.COL ELJRE R10GFA MLF1608E 100K-T MLF1608D R82K-T ELJSC K-F MLF2012K 560K-T MLF1608E 100K-T LQW18AN39NG00D B T T B B B B 10.8/43.9 9.3/53.1 8.6/58.5 30.1/27.8 19.6/25.1 33.6/57.6 4.9/44.
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[MAIN UNIT] REF NO.
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[MAIN UNIT] [MAIN UNIT] REF NO. C82 C83 C84 C85 C86 C87 C88 C89 C90 C91 C93 C94 C95 C96 C97 C98 C99 C100 C101 C102 C103 C104 C105 C106 C107 C108 C109 C110 C111 C112 C113 C114 C115 C116 C117 C118 C119 C120 C121 C122 C123 C124 C125 C126 C127 C128 C129 C130 C131 C132 C133 C134 C135 C136 C137 C138 C139 C140 C141 C142 C143 C144 C145 C146 C147 C148 C149 C150 C151 C152 C153 C154 C155 C156 C157 C158 C159 C160 C161 C162 C163 C164 C165 C168 C169 C170 C171 C172 C175 C177 C178 C179 C180 C182 C183 C184 ORDER NO.
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[MAIN UNIT] REF NO. [MAIN UNIT] ORDER NO.
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[VCO BOARD] [VCO BOARD] REF NO. ORDER NO. DESCRIPTION REF NO. H/V M.
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[MAIN UNIT] [PA BOARD] REF NO. ORDER NO. DESCRIPTION S1 S2 2260002060 S.SW 2260002060 S.SW SKQGAD SKQGAD T T 6/11.9 6/27.5 EP1 EP2 EP3 EP4 EP5 EP6 EP7 EP8 EP9 6910012350 6910015370 6910015370 6910015370 6910015370 6910015370 6910014690 6910015370 6910015370 MMZ1608Y 102BT ACZ1005Y-102-T ACZ1005Y-102-T ACZ1005Y-102-T ACZ1005Y-102-T ACZ1005Y-102-T MPZ1608S221A-T ACZ1005Y-102-T ACZ1005Y-102-T T B T B T T B B B 4.7/15.7 3.9/7.6 10.3/31.6 11.9/30.5 11.9/28.9 10.2/26.6 11.8/22.5 11.9/19.9 11.9/18.
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SECTION 7 MECHANICAL PARTS AND DISASSEMBLY [CHASISS PARTS] REF. NO. ORDER NO. [MAIN UNIT] DESCRIPTION REF. NO. QTY. ORDER NO. DESCRIPTION QTY.
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MP1 (P) J4 (M) MP28 (C) MP20 (C) MP13 (C) 29.9 (1 3/16) 52.44 (2 1/16) S8 (M) MP29 (C) MP14 (C) MC1 (M) 81 (3 3/16) MP29 (C) EP2 (M) 94.3 (3 23/32) PA board DS1 (M) MP1 (V) VCO board MP33 (C) MP5 (C) + MP35 (C) 28.
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SECTION 8 SEMICONDUCTOR INFORMATION • TRANSISTORS AND FET'S 2SA1576 S (Symbol: FS) • DIODES 2SA1588 GR (Symbol: ZG) B 2SA1832 GR (Symbol: SG) B B C 2SC4213 B (Symbol: AB) E E E E 2SC5006 (Symbol: 24) 2SC5108 Y (Symbol: MC) 2SC5277 D2 (Symbol: D2) 2SC5508 (Symbol: T79) 2SC5998 (Symbol: YC-) B B B C C E E 2SJ144 GR (Symbol: VG) 2SK880 Y (Symbol: XY) FH102 (Symbol: 102) S S G G D D E UNR9115J (Symbol: 6E) E C RQA0003 (Symbol: A0003) E2 C2 D B2 E1 S B1 C1 B B C UNR9
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SECTION 9 9-4 BC-164 BOARD LAYOUTS • TOP VIEW 9-1 MAIN UNIT to PA board V75 PTT FUNC LED PSET GND RFO VCC TX3 UTX3 GND H0 RFI V70 to CHASSIS J1 12-16V DC INPUT • TOP VIEW V65 CALL V/M SQL H5 V60 V55 H10 MP1 V50 V45 H15 V40 H20 V35 V30 J5 H25 MP2 2 SP 1 GND to CHASSIS SP1 V25 V20 H30 V15 BAND PWR H35 V10 V5 H40 V0 H0 H5 H10 H15 H20 H25 V70 V65 V60 V55 V50 V45 V40 V35 V30 V25 V20 V15 V10 V5 V0 9-3 VCO BOARD • TOP VIEW V30 V25 V20 V15 V
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• BOTTOM VIEW (BC-164) V75 V0 H0 V5 V10 V15 V20 V25 V30 V35 V40 V45 V50 V55 V60 V65 V70 V70 V75 • BOTTOM VIEW (MAIN UNIT) H5 V65 V60 H10 V55 V50 H15 V45 V35 H20 SP/MIC V40 H25 V30 V25 H30 V20 V10 H35 DIAL V15 H40 V5 V0 H45 H40 H35 H30 H25 H20 H15 H10 H5 H0 J6 16 V3C 15 LO V2C GND V1C DBL1 VCC DBL2 MOD +3S LV2 VSHIFT LV2 GND LV1 FIN 2 1 to VCO board J1 H0 V0 V5 V10 V15 V30 V20 V20 • BOTTOM VIEW (PA BOARD) V25 • BOTTOM VIEW (VCO BOARD) V15 J1
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SECTION 10 BLOCK DIAGRAM VCO BOARD Q8,Q11:2SC5006 D5:1SV286 D9:1SV308 +10V LV3 LOOP FIL Q19:2SC5108 LO AMP BUFF Q18:2SC5508 D14,D15:MA2S077 D12:1SV308 D13:1SV308 SW PA BOARD D16:1SV308 D17:1SV308 LO SW DOUBLER TX/RX SW Q2:2SC5998 D2:MA6S121 PRE DRIVE LEVEL CHANGE RFI RFO DRIVE AMP 430M Q14:2SC5108 SW CTRL 50_3V 430_3V 144_3V Q59:UNR9113J Q60:XP1110 IC19:TC7S66FU IC22:TC7W66FU IC18:ADF4110BCPZ PUL PLL IC Q10,Q13 :2SC5006 D7,D8 :HVD328C D11:1SV308 +10V 50M VCO REG CTRL HPF ANT
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TEMP CP17 +3V CPU3V C40 47 IC11 R1111N321B 1 5 VDD VOUT 2 GND 4 3 NC CE CPU3V 4 R25 2.2k Q2 2SC4617 +3SC C51 0.1 +3S R3V R3C PCON CPU3V R57 18k C58 390p C59 0.1 R65 470k Q28 2SJ144 C74 0.1 R202 2.2M VCC G R78 12k Q12 2SC4617 I FL C73 0.1 C77 0.1 MODSET CTCOUT C554 220p R79 820 Q34 2SJ144 R232 82k R75 470k R87 3.
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+3S BUS LINE2 VSHIFT VCC +3S 11 - 2 EP7 EP8 MOD DBL2 DBL1 V1C V2C ah V3C FIN LV1 GND LV2 VSHIFT LV2 +3S MOD DBL2 VCC DBL1 V1C GND V2C LO V3C Explanatory notes VOLTAGE LINE TX LINE RX LINE COMMON LINE LV1 FIN LV2 GND LV3 VSHIFT MOD +3S VCC DBL2 V1C DBL1 V2C GND V3C LO +3S R1 56k 50_3V S3V D4 MA2S077 L6 LQW18AN68NG00D R20 5.6k C62 0.01 Q10 2SC5006 R23 100 Q12 2SC5006 C68 1p C74 C95 0.001 Q13 2SC5006 C64 0.001 C75 0.001 S3V DBL2 Q16 UNR9210J R38 330 C41 0.
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SECTION 12 BC-164 1 POWER IC1 NJM2801U1-0543-TE1 1 VO VIN 5 2 GND 3 CD VOR 4 R5 0.12 R77 0 C9 0.1 C8 0.01 C6 10 C7 0.1 D1 MA8110 R76 0 R14 560k Q5 DTC144EU C19 0.01 Q7 2SA1576 C31 0.01 R80 0 R81 0 R71 4.7k R31 10k CP5 8 7 6 5 CP15 R36 4.7k R28 30k CP4 IC4 NJM2904M 1 2 3 4 R26 10k R32 3.3k C25 0.1 R29 10k X1 CSTCR4M91G R30 100k MP3 (C) MAIN unit R100 0 R99 0 R97 0 R95 0 R93 0 R92 0 R91 0 MP2 (C) 12 - 1 R98 0 R96 0 R53 0 R61 0 R65 0 R38 39k R79 0 C24 0.
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1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan Phone : +81 (06) 6793 5302 Fax : +81 (06) 6793 0013 URL : http://www.icom.co.jp/world/index.html 2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A. Phone : +1 (425) 454-8155 Fax : +1 (425) 454-1509 URL : http://www.icomamerica.com E-mail : sales@icomamerica.com Phone : +1 (425) 454-7619 Glenwood Centre #150-6165 Highway 17 Delta, B.C.