America Inc. Marine Radio User Manual

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SERVICE

MANUAL

VHF TRANSCEIVER

Summary of content (38 pages)

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SERVICE MANUAL VHF TRANSCEIVER
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INTRODUCTION This service manual describes the latest service information for the IC-F50/IC-F51 VHF TRANSCEIVER at the time of publication. MODEL VERSION U.S.A General Europe IC-F50 IC-F51 SYMBOL USA GEN EUR 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 that uses more than 8 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 SECTION 4-1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-2 TRANSMITER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4-3 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SECTION 1 SPECIFICATIONS ‘ GENERAL • Frequency coverage • Mode • Type of emission : 136.000–174.000 MHz : FM : MIDDLE WIDE NARROW VERSION 11K0F3E (12.5 kHz) [USA], [GEN] 16K0F3E (25.0 kHz) 14K0F3E (20.0 kHz) 8K0F3E (12.5 kHz) [EUR] • Number of conventional channels • Antenna connector • Operating temperature range • Power supply requirement • Current drain (at 7.2 V DC) : 128 ch, 8banks : SMA type (50 Ω) : –30 ˚C to +60˚C (–22 ˚F to +140˚F) [USA], [GEN] –25 ˚C to +55˚C [EUR] : 7.
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SECTION 2 INSIDE VIEWS • MAIN UNIT TOP VIEW +5 Regurator (IC9: NJM2870) BOTTOM VIEW Antenna switching circuit (D2,D5: 1SV307) S5 Regulator Q23: 2SB1132 Q24: XP6501 Q25: DTA144EU Power amplifier (Q7: RD07MVS1) TX/RX switch (D14,D15: MA2S077) APC amplifier (IC2: TA75S01F) T5 Regulator (Q21: 2SA1577) VCO circuit R5 Regulator (Q22: 2SA1577) D/A converter (IC6: M62363FP) Analog switch (IC13: BU4066BCFV) Baseband IC (IC10: AK2346) Expander IC (IC12: BU4094BCFV) IF amplifier (Q4: 2SC4215) IF IC (IC1: TA
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SECTION 3 DISASSEMBLY INSTRUCTIONS • REMOVING THE CHASSIS UNIT • REMOVING THE FRONT UNIT 1 2 3 4 5 6 1 2 3 4 Unscrew 1 nut A, and remove 1 knob B. Remove 1 washer c, and unscrew 1 screw D. Unscrew 2 screws E, and remove 2 washers F. Unscrew 2 screws G. Take off the chassis unit in the direction of the arrow. Remove the cable H from the chassis unit. Unscrew 4 screws M. Unsolder 11 points N. Unplug the connector O from J402 on the Front unit. Take off the front unit in the direction of the arrow.
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SECTION 4 CIRCUIT DESCRIPTION The RF signals from the bandpass filter are mixed with the 1st LO signals, where come from the RX VCO circuit via the attenuator (R26–R28), at the 1st mixer circuit (Q3) to produce a 46.35 MHz 1st IF signal. The 1st IF signal is passed through a monolithic filter (FI1) in order to obtain selection capability and to pass only the desired signals. The filtered signal is applied to the 2nd IF circuit after being amplified at the 1st IF amplifier (Q4).
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• CTCSS AND DTCS The tone squelch circuit detects AF signals and opens the squelch only when receiving a signal containing a matching subaudible tone (CTCSS or DTCS). When tone squelch is in use, and a signal with a mismatched or no subaudible tone is received, the tone squelch circuit mutes the AF signals even when noise squelch is open. 4-1-5 AF AMPLIFIER CIRCUIT (MAIN AND FRONT UNITS) The AF amplifier circuit amplifies the demodulated AF signals to drive a speaker.
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The power detector circuit (D1) detects the transmit power output level and converts it into DC voltage. The output voltage is at a minimum level when the antenna impedance is matched at 50 Ω and is increased when it is mismatched. 4-2-2 MODULATION CIRCUIT (MAIN UNIT) The modulation circuit modulates the VCO oscillating signal (RF signal) using the microphone audio signals.
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4-4-2 FRONT UNIT VOLTAGE LINE 4-3-2 VCO CIRCUIT (MAIN UNIT) The VCO circuit contains a separate RX VCO (Q14, D19, D20) and TX VCO (Q13, D16, D17). The oscillated signal is amplified at the buffer amplifiers (Q10, Q12) and is then applied to the T/R switch (D14, D15). Then the receive 1st LO (Rx) signal is applied to the 1st mixer (Q3) and the transmit (Tx) signal to the pre-drive amplifier circuit (Q9).
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4-5 OTHER CIRCUITS 4-6 PORT ALLOCATIONS 4-5-1 COMPOUNDER CIRCUIT (MAIN UNIT) 4-6-1 EXPANDER IC (FRONT UNIT; IC410) IC-F50/F51 have compounder circuit which can improve S/N ratio and become wide dynamic range to suppress the transmitting signal and to extend receiving signal. The circuit is composed of the base band IC (MAIN unit; IC10). Pin number Port name 4 LEDR Outputs RX LED control signal. Low: Lights ON. 5 LEDT Outputs TX LED control signal. Low: Lights ON.
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4-6-2 MAIN CPU (FRONT unit; IC401) Pin number Port name 1–11, SEG23– SEG13, 13, SEG12, 15–25, SEG11– SEG1 26 SO Outputs serial data to the PLL IC (MAIN unit; IC6, pin 8) and D/A convertor (MAIN unit; IC6, pin 8). 27 SCK Outputs serial clock signal to the PLL IC (MAIN unit; IC4, pin 9), D/A convertor (MAIN unit; IC6, pin 7), etc. 28 MDIO I/O port for the serial data signals from/to the base band IC (MAIN unit; IC10, pin 11).
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4-6-3 EXPANDER IC (FRONT UNIT; IC410) 4-6-5 EXPANDER IC (MAIN UNIT; IC12) Pin number Port name Pin number Port name Description 4 LEDR Outputs RX LED control signal. Low: Lights ON. 4 R5C 5 LEDT Outputs TX LED control signal. Low: Lights ON. Outputs the R5 regulator (Q22) control signal. Low: While receiving. 5 T5C Outputs the T5 regulator (Q21) control signal. Low: While transmitting. 6 LIGT Outputs the S5 regulator (Q23–Q25) control signal.
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SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION When adjusting IC-F60/F61, the optional CS-F50 ADJ ADJUSTMENT SOFTWARE (Rev. 1.0 or later), *OPC-966 JIG CABLE (modified OPC-966 CLONING CABLE) are required. ■ REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE DC power supply Output voltage Current capacity : 7.
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• SCREEN DISPLAY EXAMPLE CS-F50 ADJ Rev.1.0 File Option COM 1: OPEN 2 Connect Reload (F5) Disp para 1 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 [A / D] VIN : 203 : CBh : 7.96 V TEMPS : 190 : BEh : 32.23 'C LVIN : 110 : 6Eh : 2.16 V SD : 31 : 1Fh : 0.61 V S MTR : CH No.
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• CONNECTION to the antenna connector FM deviation meter Attenuator 40 dB or 50 dB Standard signal generator 0.1 µV to 32 mV (–127 dBm to –17 dBm) CAUTION! DO NOT transmit while to SSG is connected to the antenna connector RF power meter 0.1–10 W/50 Ω Frequency counter Personal computer to an RS-232C port IC-F50/F51 Audio generator DB9 female plug SINAD meter (incl.
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5-2 SOFTWARE ADJUSTMENTS (TRANSMITTING) Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard. ADJUSTMENT PLL LOCK VOLTAGE [LV (RX LVA)] [LV (TX LVA)] ADJUSTMENT CONDITION 1 • Operating CH • Receiving : CH3 2 • Operating CH • Transmitting : CH3 3 • Operating CH • Receiving : CH11 4 • Operating CH • Transmitting : CH11 MEASUREMENT UNIT LOCATION Soft ware Check the “LV” item on the CSF50 ADJ’s display. VALUE 3.5 V 3.
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SOFTWARE ADJUSTMENTS (RECEIVING) • Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard. • Need to adjust “S-METER ADJUSTMENT” after “RX SENSITIVITY ADJUSTMENT” is adjusted. Otherwise, “S-METER ADJUSTMENT” will not be adjusted properly.
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SECTION 6 PARTS LIST [VR BOARD] REF NO. [FRONT UNIT] ORDER NO. DESCRIPTION REF NO. M. ORDER NO. DESCRIPTION M. R601 7210003130 VARIABLE TP76N97N-13F-10KA-2497 T X401 6050011720 S.XTAL CR-764 (19.
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[FRONT UNIT] REF NO. [FRONT UNIT] ORDER NO. DESCRIPTION REF NO. M. R494 R495 R496 R497 R500 R501 R502 R503 R506 R507 R508 R509 R511 R512 R513 R514 7030008010 7030008010 7030005050 7030005050 7030005090 7030005090 7030010080 7030010080 7030007300 7030005600 7030007290 7030005090 7030005700 7030005090 7030009290 7030010040 S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.RESISTOR S.
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[MAIN UNIT] REF NO. [MAIN UNIT] ORDER NO. DESCRIPTION M. B B B T B B Q23 Q24 Q25 Q26 Q27 Q29 1520000450 1590001190 1590000720 1590003320 1590000720 1590000430 S.TRANSISTOR S.TRANSISTOR S.TRANSISTOR S.FET S.TRANSISTOR S.TRANSISTOR 2SB1132 T100 Q XP6501-(TX) .
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[MAIN UNIT] REF NO. [MAIN UNIT] ORDER NO.
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[MAIN UNIT] REF NO. C117 C118 C119 C120 C121 C122 C123 C124 C126 C127 C129 C132 C133 C134 C135 C137 C138 C139 C140 C141 C143 C145 C146 C147 C148 C149 C150 C151 C152 C153 C154 C155 C156 C157 C158 C159 C161 C162 C163 C164 C165 C166 C167 C168 C169 C170 C171 C172 C180 C182 C183 C184 C185 C186 C188 C190 C191 C192 C193 C194 C195 C199 C200 C201 C202 C203 C205 C206 C207 C208 C209 C211 C213 C220 C221 C222 C223 C224 C225 C226 C227 C228 C229 C230 C231 C232 C233 C234 [MAIN UNIT] ORDER NO.
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SECTION 7 MECHANICAL PARTS AND DISASSEMBLY 7-1 CABINET PARTS [MAIN UNIT] [ACCESSORIES] REF. NO. ORDER NO. MP4 DESCRIPTION REF. NO. ORDER NO. QTY. 8510015670 2681 shield plate 1 EP1 EP2 MP1 MP2 MP3 MP4 [CHASSIS PARTS] REF. NO. ORDER NO. DESCRIPTION QTY.
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50.45 (1 31/32) 36.4 (1 7/16) 149.8 (5 29/32) Unit:mm (inch) 97.7 (3 27/32) 110.2 (4 11/32) CONNECTOR BOARD MP419(F) MP6(C) FRONT Unit R601(V) MP9(C) 31.4 (2 7/32) MP424(F) MP8(C) MP407(F) 56 (2 7/32) 62.
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SECTION 8 SEMI-CONDUCTOR INFORMATION • TRANSISTOR AND FET’S 2SA1577 Q (Symbol: HP) 2SB1132 Q (Symbol: BAQ) 2SC4116 BL (Symbol: LL) B B C 2SC4116 Y (Symbol: LY) B B B C C E E 2SC4215 O (Symbol: QO) C C E E E 2SC4226 R25 (Symbol: R25) 2SC5107 O (Symbol: MFO) 2SC5110 O (Symbol: MGO) B B B E E 3SK293 (Symbol: UF) G1 G2 D DTA144 EU (Symbol: 16) S DTC144EU (Symbol: 26) B G1 RD07MVS1 (Symbol: RD07MVS1) G2 D RSR025N03 (Symbol: QY) G G D D S E 1 4 B1 2 5 E1 3 6 B2 S
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SECTION 9 BOARD LAYOUTS 9-1 MAIN UNIT • TOP VIEW F1 C307 C237 C296 C297 C293 S1 J1 (CHASSIS UNIT) R168 Q26 C236 R167 IC9 C295 C230 C85 L18 C81 EP2 C86 C87 R5 R12 R173 R174 C147 C23 L31 C17 C22 R15 C32 C37 R16 R20 C38 D9 D23 C143 Q16 R89 C39 R101 R175 R88 C103 R75 C28 C33 Q2 Q1 Q18 EP1 R80 C40 C146 R96 R95 C138 L27 R21 L28 L42 C45 R23 C42 D18 C202 R113 L32 C201 C43 D10 C203 C206 C207 C26 C30 C141 C139 L41 C205 R76 C105 Q11 Q15
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• BOTTOM VIEW C292 R165 L17 C239 C233 C235 C238 C10 C82 C11 C2 C8 C4 L2 Q25 L16 C13 L4 L1 C7 L3 C5 L5 L15 R1 C9 C6 MP1 D2 C14 L6 D5 C234 R166 L20 C1 C302 C3 R51 Q24 Q23 C308 C24 C72 D15 Q29 C96 Q9 C93 D14 C97 L19 R65 Q21 R62 C231 C90 IC7 R161 C35 R162 C184 R18 L8 C305 R63 C108 C95 R68 C31 C74 C99 R67 C15 R52 R69 C16 C291 D1 C101 L7 C182 R24 R17 L39 R97 R117 C153 D24 R93 R91 R118 R164 C151 R94 R163 Q22 C152 C209 C56 C149
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9-2 FRONT UNIT TOP VIEW C486 C424 C434 IC405 C401 C435 C496 R435 C475 J402 C436 R436 R514 C428 R476 C411 C431 R422 R423 C487 C491 R438 C439 C421 C409 C432 C483 C410 R421 Q408 R470 Q402 C408 R469 C423 C430 R420 C445 R464 IC410 D406 R482 R461 R463 C493 R462 R465 R511 R426 C405 R408 R429 R405 C482 R437 C478 C498 C441 C427 Q401 C444 C499 R428 C477 R406 C448 C443 C442 C425 R432 R427 R410 C406 C481 R430 R433 C404 C495 C488 R468 IC406 R513
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• BOTTOM VIEW DS406 C485 Q403 R442 R444 Q406 Q404 R443 C484 C433 MC401 R458 Q413 R445 R446 R434 C426 C437 Q405 DS405 DS402 DS403 9-4 C500 DS404 R457
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9-3 VR BOARD • TOP VIEW R601 • BOTTOM VIEW VHF B6034B 9-5
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9-4 CONNECTOR BOARD TOP VIEW MP701 • 9 1 PTT MIC TXD RXD RESET MICE OPTV VCC AFO R7 01 D704 B6035C PTT MIC CLO CLI RES GND OPTV AFO VCC C704 C703 EP703 EP705 EP704 D705 C702 EP702 BOTTOM VIEW C701 EP701 • D703 D702 D701 9-6
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SECTION 10 BLOCK DIAGRAM S5V Q17: 2SC4116 Q18: 2SK880 LVIN IC16: NJM12904 X2 CR–763 15.
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SECTION 11 VOLTAGE DIAGRAM 11-1 MAIN UNIT VCC VCC T5V R52 150 L15 4.7 H C8 18 P C7 D2 0.001 1SV307 C1 9P C3 24 P C5 22 P C83 0.001 C2 8P C4 11 P MP1 C9 15 P C6 L1 L2 0.001 3.0 nH 32 nH R51 82 k C291 0.001 C101 0.001 0 C98 10 C91 0.001 R55 4.7 k R54 100 k C84 470 P R53 22 C87 27 P R57 68 1.7 L3 50 nH Q7 RD0MVS1 C86 100 C88 0.001 C89 0.01 L17 23.2 nH C82 0.001 C94 47 P R58 33 k R59 4.7 k C90 0.001 R62 100 C95 0.001 R65 1.5 k 0 EP2 C85 0.001 C97 47 P C95 0.
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R474 22 k SENC3 TONE CDCS MIC SIGNAL DUSE Voltage line TX line SPON AFON 6 5 4 LVIN RSSI TEMP UNLK MDIR MRDF DAST CSFT D404 MA2S077 C418 0.1 GND GND RX line S5V CPU5 PWON VCC VCC 1 2 3 Q402 XP6501AB R439 2.
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11-3 VR / CONNECTOR BOARDS VR BOARD R601 TP76N97N-13F-10KA-2497 DUSE AFOUT SIGNAL PWON 4 3 2 1 From / to the J402 at the FRONT UNIT W601 CONNECTOR BOARD VCC EP701 AFO AFO VCC OPTV MICE RESET RXD TXD MIC PTT 1 2 3 4 5 6 7 8 9 MP701 OPTV GND C703 0.001 MICE C702 0.001 VCC EP703 C701 0.001 EP702 R701 1k MIC EP705 PTT D705 AVR-M1005 C080MTABB C704 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 Icom America Inc. Icom (Europe) GmbH 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 Communication Equipment Himmelgeister Str.