Icom IC-F2610 Service Manual
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Icom IC-F2610 Service Manual

Uhf fm transceiver
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SERVICE
MANUAL
UHF FM TRANSCEIVER
iF2610

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Summary of Contents for Icom IC-F2610

  • Page 1 SERVICE MANUAL UHF FM TRANSCEIVER iF2610...
  • Page 2 IC-F2610 MAIN UNIT 05 pieces ceiver is defective. 8810008660 Screw BT M3x8 NI-ZU IC-F2610 Bottom cover 10 pieces 6. DO NOT transmit power into a signal generator or a Addresses are provided on the inside back cover for your sweep generator.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 OPTION INSTALLATIONS SECTION 4 CIRCUIT DESCRIPTION 4 - 1 RECEIVER CIRCUITS..........................4 - 1 4 - 2 TRANSMITTER CIRCUITS........................4 - 2 4 - 3 PLL CIRCUITS............................4 - 3 4 - 4 POWER SUPPLY CIRCUITS ........................
  • Page 4 SECTION 1 SPECIFICATIONS Mesurement method ETS 300 086 Frequency coverage 440–490 MHz × Number of channels 128 (16 ch 8 banks) 16K0F3E (25 kHz; Wide) Type of emission 8K50F3E (12.5 kHz; Narrow) Operating temperature range –20˚C to +55˚C Power supply voltage 13.2 V DC (negative ground) TX max.
  • Page 5 SECTION 2 INSIDE VIEW Low-pass filter circuit MAIN unit Power module* (IC11: SC-1323) RF amplifier* AF power amplifier (Q1: 3SK116) (IC8: LA4425A) 1st IF filter PLL IC* (FI1: FL-264) (IC12: MC145190F) Discriminator (X2: CDBC455CX16) (IC20: HD64F3437F16) FM IF IC* (IC1: MC3372SVM) EEPROM (IC27: X25650S8I-2.5) Microphone amplifier...
  • Page 6 SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS • Opening cover • Installation location Remove 4 screws from bottom cover. Install option units. OPC-617 ACC CABLE: J4 UT-96 5-TONE UNIT UT-103 FFSK Logic Board or UT-105 SmarTrunk II Logic Board EX-1761 MEMORY EXPANSION UNIT: J7 OPC-821 AVL CONNECT CABLE J501 or OPC-822 INTERFACE CABLE...
  • Page 7 • RMK-1 connection ¡ Remove 3 allen-socket bolts from the front plate using an allen-wrench (1/32 in). ™ Separate the front unit from the transceiver main unit. £ Attach the ‘RMK-1 rear unit attachment’ to the trans- ceiver main unit using the supplied screws. ¢...

  • Page 8: Circuit Description

    SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS through the matching circuit (L14, L15) and a pair of crystal filters (FI1a/b) in order to obtain selection capability and to 4-1-1 ANTENNA SWITCHING CIRCUIT pass only the desired signals. The filtered signal is applied The antenna switching circuit functions as a low-pass filter to the 2nd IF circuit after being amplified at the 1st IF ampli- while receiving and a resonator circuit while transmitting.

  • Page 9: Transmitter Circuits

    4-1-5 AF AMPLIFIER CIRCUIT A portion of the AF signals from the AF amplifier (IC2) pass through the low-pass filter (Q503) and are then applied to The AF amplifier circuit amplifies the demodulated AF sig- the CTCSS decoder inside the CPU (IC20, pin 43) via the nals to drive a speaker.

  • Page 10: Pll Circuits

    4-2-2 MODULATION CIRCUIT 4-2-4 APC CIRCUIT The modulation circuit modulates the VCO oscillating signal The APC circuit protects the power module (IC11) from a (RF signal) using the microphone AF signals. mismatched output load and stabilizes the output power. The AF signals from the level controller (IC5) change the The APC detector circuit detects forward signals and reflec- reactance of varactor diode (D46) to modulate the oscillated tion signals at D3 and D1 respectively.

  • Page 11: Power Supply Circuits

    4-4 POWER SUPPLY CIRCUIT The lock voltage is also used for the receiver tunable band- pass filters to match the filter’s center frequency to the VOLTAGE LINE desired receive frequency. The lock voltage is amplified at LINE DESCRIPTION the buffer amplifier (Q29) and is then applied to the band- pass filters (D7–D11, D514).

  • Page 12: Port Allocations

    4-5 PORT ALLOCATIONS CPU (IC20) Port Port Description Description number name number name Outputs the PTT control signal. Outputs strobe signals for the level PTTO DSTB Low : While transmitting controller. (IC5) Input port for the PTT control signal Outputs data signal for the level con- PTTI from PTTO port.

  • Page 13: Adjustment Procedures

    SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output Voltage : 13.2 V DC Frequency range : 0.1–600 MHz DC power supply Standard signal Current capacity : 15 A or more Output level : 0.1 µV–32 mV generator (SSG)

  • Page 14: Initial Set Mode

    Indicate the received signal level S-METER PC programming. In such case, cannot be used regardless of keys. and only ‘DISPLAY’ setting is available. Ask your Dealer or Icom Service Center for PC programming. Low 1 Low 2 High TX POWER SELECTION METHOD MODE...

  • Page 15: Pll Adjustment

    5-3 PLL ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST PLL LOCK • Operating frequency : 440.000 MHz MAIN Connect a digital multi- 2.0 V MAIN VOLTAGE • Receiving meter or an oscillo- scope to the check point “LV”.

  • Page 16: Receiver Adjustment

    5-4 RECEIVER ADJUSTMENT ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITIONS METHOD VALUE ADJUST RECEIVER • Operating frequency : 440.000 MHz Number digits in the LCD Maximum indi- Adjust in sequence SENSITIVITY • Enter Initial Set Mode No. 5. cation L8, L9, L11, L12, Refer to page 5-2 for details.

  • Page 17: Transmitter Adjustment

    5-5 TRANSMITTER ADJUSTMENT ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITIONS METHOD VALUE ADJUST OUTPUT • Operating frequency : 440.000 MHz Connect an RF power meter to 25 W Rotate volume POWER • Enter Initial Set Mode No. 6. the antenna connector. control while Refer to page 5-2 for details.

  • Page 18: Parts List

    SECTION 6 PARTS LIST [FRONT UNIT] [FRONT UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1130009120 S.IC SED1526F0A 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 1140007631 S.IC HD6433640A33H 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 1110003500 S.IC S-80742SL-A6-T1 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 1130005720 S.IC TC7W04F (TE12L) 7030003680 S.RESISTOR...

  • Page 19: Main Unit

    [FRONT UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION DS11 5040002030 S.LED CL-170Y-CD-T 1590002300 S.TRANSISTOR FMW2 T148 DS13 5040002030 S.LED CL-170Y-CD-T 1530002060 S.TRANSISTOR 2SC4081 T107 R DS14 5040002030 S.LED CL-170Y-CD-T 1510000510 S.TRANSISTOR 2SA1576A T106R DS15 5040002030 S.LED CL-170Y-CD-T 1530002060 S.TRANSISTOR 2SC4081 T107 R DS16 5040002030 S.LED CL-170Y-CD-T 1540000550 S.TRANSISTOR...
  • Page 20 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION D506 1160000060 S.DIODE DAN202U T107 6200003960 S.COIL MLF1608A 1R0K-T D507 1720000360 S.DIODE HSU88TRF 6200004210 S.COIL MLR1608M 15NJ-T D508 1750000130 S.DIODE DA204U T107 L502 6200004720 S.COIL MLF1608D R10K-T D509 1160000060 S.DIODE DAN202U T107 L504 6200004880 S.COIL ELJFC 3R3K-F...
  • Page 21 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R109 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) R226 7030003670 S.RESISTOR ERJ3GEYJ 823 V (82 kΩ) ERJ3GEYJ 151 V (150 Ω) ERJ3GEYJ 101 V (100 Ω) R110 7030003340 S.RESISTOR R228 7030003320 S.RESISTOR MCR10EZHJ 27 Ω...
  • Page 22 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 221 V (220 Ω) R337 7030003360 S.RESISTOR R535 7410000950 S.ARRAY EXB-V8V 102JV R338 7030003650 S.RESISTOR ERJ3GEYJ 563 V (56 kΩ) R538 7410000950 S.ARRAY EXB-V8V 102JV R339 7030003610 S.RESISTOR ERJ3GEYJ 273 V (27 kΩ) R540 7030004360 S.RESISTOR ERJ3EKF 5901 V (5.9 kΩ)
  • Page 23 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030011050 S.CERAMIC GRM42-6 CJ 030C 500PT C100 4030010240 S.CERAMIC C1608 JB 1H 391K-T-A 4030011050 S.CERAMIC GRM42-6 CJ 030C 500PT C101 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C102 4030006900 S.CERAMIC C1608 JB 1E 103K-T-A...
  • Page 24 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C200 4550002890 S.TANTALUM TESVA 1A 225M1-8L C297 4030007010 S.CERAMIC C1608 CH 1H 100D-T-A C201 4030011600 S.CERAMIC C1608 JB 1C 104KT-N C299 4030011600 S.CERAMIC C1608 JB 1C 104KT-N C202 4030006870 S.CERAMIC C1608 JB 1H 222K-T-A C300 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A...
  • Page 25 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C403 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A C555 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C404 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A C556 4550003220 S.TANTALUM TEMSVA 1E 105M-8L C405 4030007090 S.CERAMIC C1608 CH 1H 470J-T-A C557 4510006090 S.ELECTROLYTIC ECEV0GA470SR...
  • Page 26 SECTION 7 MECHANICAL PARTS [CHASSIS PARTS] [UNPACKING] REF. NO. ORDER NO. DESCRIPTION QTY. REF. NO. ORDER NO. DESCRIPTION QTY. 5210000120 Fuse FGB 15A 6510004880 Connector MR-DS-E 01 Optional product Microphone HM-100 8010016320 1705 chassis 8810008660 Screw PH BT M3 X 8 NI-ZU Optional product Speaker SP-22 8810008660...
  • Page 27 OPPOSITE DIRECTION TO THE MAIN UNIT MP4 (C) J1 (C) MP8 (M) W4 (M) EP3 (M) MP2 (C) MP2 (C) MP10 MP12 (M) FRONT UNIT MP9 (F) R26 (F) MP9 (M) J1 (F) MP11 MP1 (C) MAIN (Top side) MP11 (C) MP2 (M) + MP4 (M) J5 (M) MP6 (M)
  • Page 28 SECTION 8 SEMI-CONDUCTOR INFORMATION • TRANSISTOR AND FET’S • DIODES 2SC3356 R25-T2B 2SC4081 T107 R 2SC4116-BL 1SS302 1SS352 1SS355 1SV217 1T365-01-T8A 2SA1576 R 2SB1123T-TD (Symbol: R25) (Symbol: BR) (Symbol: LL) (Symbol: C3) (Symbol: C1) (Symbol: A) (Symbol: T6) (Symbol: Pink) (Symbol: FR) (Symbol: BF) 2SC4226-T2 R25...

  • Page 29: Front Unit

    SECTION 9 BOARD LAYOUTS 9-1 FRONT UNIT ¡ ¡ TOP VIEW to MICROPHONE 9 - 1...
  • Page 30 ¡ ¡ BOTTOM VIEW to MAIN unit J5 9 - 2...

  • Page 31: Main Unit

    9-2 MAIN UNIT ¡ ¡ TOP VIEW CHASSIS J1 BLACK MP12 C587 C586 IC11 MP9,MP8 J501 to optional cable OPC-821, OPC-822 MP2,MP4 DISC PAAF HORN R618 to optional cable OPC-617 to FRONT unit J2 to optional unit to optional unit UT-96, UT-105 EX-1761 EEPROM 0 - 5...
  • Page 32 ¡ ¡ BOTTOM VIEW MP12 C591 C592 MP13 MP13 MP11 MP10 9 - 4...
  • Page 33 SECTION 10 BLOCK DIAGRAM 400–520 MHz DISC R8V 1st mixer SFPC455E UM9401F SFPC455H AF OUT TX/RX M5282FP TA75W558FU D501 D502 3SK166 DTC114EU DAN202U DAN202U 3SK166 FL-264 Q515 Q501,Q502,Q510 DTC144EU EXT SP DTA144EU IC2b Q518 DTC114EU D513 MA77 MUTE CTRL FM IC RSSI CONT +20V...
  • Page 34 SECTION 11 VOLTAGE DIAGRAM 11-1 FRONT UNIT LIGHT ON (DIM OFF) 7.64V LIGHT ON (DIM OFF) 7.75V LIGHT ON (DIM ON) 5.99V LIGHT ON (DIM ON) 6.20V LIGHT ON LIGHT OFF LIGHT OFF 7.98V LIGHT OFF 7.98V 5.04V 100k 100k 100k 100k 100K...
  • Page 35 11-2 MAIN UNIT [EXT SP] PAMIC 1/2VDD PAAF DATA BUS R162 C354 C344 0.001 0.001 PSET PSET +18V C184 +18V 0.001 C563 5.03 V R298 R348 C362 R148 R319 R304 0.56 R374 PLLIN 7.90 V 3.9k 0.001 R239 C279 C307 100k R303 C155...
  • Page 36 OPT AF BUS AF BUS 4.76 V SQL OPEN 4.81 V SQL CLOSE 0.12 V R62 1.5k 0.047 0.047 0.047 SQL OPEN 0.87 V 2.2k SQL OPEN 0 ,V R338 SQL CLOSE 4.56 V 3.96 V SQL CLOSE 4.21 V R595 2.51 V 2.53 V...
  • Page 37 11-2 MAIN UNIT [EXT SP] OPT AF BUS AF BUS 4.76 V PAMIC 1/2VDD SQL OPEN 4.81 V PAAF DATA BUS SQL CLOSE 0.12 V 0.047 SQL OPEN 0.87 V R62 1.5k 0.047 2.2k 0.047 R338 SQL OPEN 0 ,V R162 SQL CLOSE 4.56 V 3.96 V...
  • Page 38 08190 Sant Cugat del Valles Barcelona, SPAIN Phone : ( 93 ) 590 26 70 Fax : ( 93 ) 589 04 46 A Division of Icom America Inc. 3071 #5 Road, Unit 9, Richmond, B.C., V6X 2T4, Canada : http://www.icomspain.com...
  • Page 39 A-5547HI-SU 6-9-16, Kamihigashi, Hirano-ku Osaka 547-0002, Japan C C 1999 Icom Inc.

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