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

Icom IC-F2610 Service Manual

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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 This service manual describes the latest service information NEVER connect the transceiver to an AC outlet or to a DC for the IC-F2610 UHF FM TRANSCEIVER at the time of pub- power supply that uses more than 16 V. This will ruin the transceiver.

  • Page 3: Table Of Contents

    EXPLICIT DEFINITIONS FREQUENCY COVERAGE Lo-band 400-430 MHz Middle-band 440-490 MHz Hi-band 490-520 MHz TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEW SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPTION 4 - 1 RECEIVER CIRCUITS ............4 - 1 4 - 2 TRANSMITTER CIRCUITS .

  • Page 4: Specifications

    SECTION 1 SPECIFICATIONS Measurement method ETS 300 086 Frequency coverage 400–430 MHz [L-band], 440–490 MHz [M-band], 490–520 MHz [H-band] × 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)

  • Page 5: Inside View

    SECTION 2 INSIDE VIEW Low-pass filter circuit MAIN unit Power module* IC11: SC-1322 [L-band] SC-1323 [M-band] SC-1324 [H-band] RF amplifier* AF power amplifier (Q1: 3SK166) (IC8: LA4425A) 1st IF filter PLL IC* (FI1: FL-266) (IC12: MC145190F) Discriminator (X2: CDBC455CX16-TC) IC20: HD64F3437F [BIIS]only HD64F3437F16 [OTHER] FM IF IC*...

  • Page 6: Disassembly And Option Instructions

    SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS • Opening cover • Installation location Remove 4 screws from bottom cover. OPC-617 ACC CABLE OPC-821 AVL CONNECT CABLE OPC-822 INTERFACE CABLE UT-96 5-TONE UNIT UT-103 FFSK Logic Board UT-105 SmarTrunk Logic Board UT-109 VOICE SCRAMBLER UNIT (Non-rolling type) UT-110 VOICE SCRAMBLER UNIT (Rolling type)
  • 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 transceiver main unit using the supplied screws. ¢...

  • Page 8: Circuit Description

    SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS The RF signals from the bandpass filter are mixed with the 1st LO signals, which come from the Rx VCO circuit via the 4-1-1 ANTENNA SWITCHING CIRCUIT LO amplifier (Q3), at the 1st mixer circuit (Q2) to produce a (MAIN UNIT) 30.875 MHz 1st IF signal.

  • Page 9: Transmitter Circuits

    The N/W switches (D501, D502) select a ceramic filter (FI3 • CTCSS AND DTCS or bypass), and the other N/W switch (Q61) adjusts the input The tone squelch circuit detects AF signals and opens the level of the FM IF IC (IC1, pin 8) to switch the bandwidth squelch only when receiving a signal containing a matching depending on the NWC signal from the CPU (IC20, pin 57).
  • Page 10 The N/W switches (IC502, Q65) are connected to the input The amplified signal is passed through the antenna switch- lines of the splatter filter section (IC22) and buffer amplifier ing circuit (D4), low-pass filter and APC detector. Then the (IC503) respectively. The N/W switches (IC502, Q65) are signal is applied to the antenna connector.

  • Page 11: Pll Circuits

    4-4 POWER SUPPLY CIRCUIT 4-3 PLL CIRCUITS VOLTAGE LINE 4-3-1 PLL CIRCUIT (MAIN UNIT) A PLL circuit provides stable oscillation of the transmit fre- LINE DESCRIPTION quency and receive 1st LO frequency. The PLL circuit con- The voltage from the external power connector. sists of the PLL IC, charge pump, loop filter and reference oscillator and employs a pulse swallow counter.

  • Page 12: Ut-103 Circuit Description

    4-5 UT-103 CIRCUIT DESCRIPTION In case of the FFSK signal is used for the PM modulation, the FM/PM switch (IC2) is switcheded to pin 7. 4-5-1 GENERAL IC1 is the FFSK modem IC which is controlled by serial data In case of the FFSK signal is used for the FM modulation, bus line (“CCS”, “SI”, “SO”, “SCK”, “CIRQ”...

  • Page 13: Port Allocations

    4-6 PORT ALLOCATIONS CPU (MAIN UNIT; 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 14: Adjustment Procedures

    SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION I 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 15: 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 I SELECTION METHOD MODE...

  • Page 16: Pll Adjustment

    5-3 PLL ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST PLL LOCK • Operating freq. : 390.000 MHz MAIN Connect a digital multi- 2.0 V MAIN VOLTAGE 440.000 MHz meter or an oscillo- 480.000 MHz scope to the check •...

  • Page 17: Receiver Adjustment

    5-4 RECEIVER ADJUSTMENT ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITIONS METHOD VALUE ADJUST RECEIVER • Operating freq. : 400.000 MHz Number digits in the LCD Maximum indi- Adjust in sequence SENSITIVITY 440.000 MHz cation L8, L9, L11, L12, 490.000 MHz L13 on the MAIN •...

  • Page 18: Transmitter Adjustment

    5-5 TRANSMITTER ADJUSTMENT ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITIONS METHOD VALUE ADJUST OUTPUT • Operating freq. : 400.000 MHz Connect an RF power meter to 24 W [25 W] Rotate volume POWER 440.000 MHz [M] the antenna connector. 10 W [10 W] control while 490.000 MHz [H]...

  • Page 19: 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 FX-2140S 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 1110005940 S.IC S-80842CLMC-B63-T2 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 1130005720 S.IC TC7W04F (TE12L)

  • Page 20: Ref

    S.IC NJM2904V-TE1 Q502 1590000720 S.TRANSISTOR DTA144EUA T106 IC11 1150001670 S-AU27AL (ICOM) / SC-1322 Q503 1590001650 S.TRANSISTOR XP4601 (TX) S-AU27AM (ICOM) / SC-1323 M Q504 1560000810 S.FET 2SK1069-4-TL 1150001680 S-AU27AH (ICOM) / SC-1324 H Q505 1590000430 S.TRANSISTOR DTC144EUA T106 1150001690 Q506 1560000810 S.FET...
  • Page 21 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1750000550 S.DIODE 1SS355 TE-17 6200001620 S.COIL ELJFC 1R0K-F [Other] 1790001280 S.DIODE MA111 (TX) 6200003960 S.COIL MLF1608A 1R0K-T 1720000400 S.VARICAP 1SV245 (TPH3) 6200001620 S.COIL ELJFC 1R0K-F 1750000550 S.DIODE 1SS355 TE-17 6200003690 S.COIL MC152-E558ANA-100051=P3 1750000550 S.DIODE 1SS355 TE-17...
  • Page 22 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 7030005491 S.RESISTOR ERA3YKD 363V (36 kΩ) R150 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) ERJ3GEYJ 101 V (100 Ω) 7030003320 S.RESISTOR 7030003600 S.RESISTOR ERJ3GEYJ 223 V (22 kΩ) 7030003460 S.RESISTOR ERJ3GEYJ 152 V (1.5 kΩ) 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ)
  • Page 23 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 271 V (270 Ω) R270 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) R385 7030003370 S.RESISTOR ERJ3GEYJ 561 V (560 Ω) R271 7030003720 S.RESISTOR ERJ3GEYJ 224 V (220 kΩ) 7030003410 S.RESISTOR ERJ3GEYJ 821 V (820 Ω) [Other] R272 7030003440 S.RESISTOR...
  • Page 24 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R559 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) 4030011050 S.CERAMIC GRM31M3C2H3R0CY21L (GRM42-6 CJ) R560 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) R561 7030003440 S.RESISTOR ERJ3GEYJ 102 V (1 kΩ) 4030011060 S.CERAMIC GRM31M2C2H4R0CY21L (GRM42-6 CH) R562 7030003720 S.RESISTOR...
  • Page 25 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030009510 S.CERAMIC C1608 CH 1H 010B-T [Other] C116 4030006850 S.CERAMIC C1608 JB 1H 471K-T C117 4030006900 S.CERAMIC C1608 JB 1H 103K-T 4030009560 S.CERAMIC C1608 CH 1H R75B-T C118 4030006860 S.CERAMIC C1608 JB 1H 102K-T 4030009350 S.CERAMIC C1608 CH 1H 3R5B-T...
  • Page 26 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C177 4030006850 S.CERAMIC C1608 JB 1H 471K-T C284 4030007130 S.CERAMIC C1608 CH 1H 101J-T C178 4030007090 S.CERAMIC C1608 CH 1H 470J-T C285 4030007090 S.CERAMIC C1608 CH 1H 470J-T C179 4550000550 S.TANTALUM TEESVA 1V 224M8L C286 4030007170 S.CERAMIC...
  • Page 27 [MAIN UNIT] [MAIN UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C379 4030006850 S.CERAMIC C1608 JB 1H 471K-T C521 4550006250 S.TANTALUM TEESVA 1A 106M8L C380 4030006860 S.CERAMIC C1608 JB 1H 102K-T C522 4030006860 S.CERAMIC C1608 JB 1H 102K-T C381 4030007090 S.CERAMIC C1608 CH 1H 470J-T C524 4030006880 S.CERAMIC...
  • Page 28 [MAIN UNIT] [TONE UNIT] (UT-96 pre-installed version ONLY) ORDER ORDER DESCRIPTION DESCRIPTION B only C608 4030009530 S.CERAMIC C1608 CH 1H 030B-T 0880000150 UNIT BOARD EX-1643 #02 B only C609 4030009530 S.CERAMIC C1608 CH 1H 030B-T B only C610 4030007050 S.CERAMIC C1608 CH 1H 220J-T B only C611...
  • Page 29 SECTION 7 MECHANICAL PARTS AND DISASSEMBLY [CHASSIS PARTS] [ACCESSORIES] REF. ORDER REF. ORDER DESCRIPTION QTY. DESCRIPTION QTY. 6510004880 Connector MR-DS-E 01 5210000120 Fuse FGB 15A 8010019000 1705 chassis (B)-1 0800005780 Microphone HM-100N Screw PH BT M3 × 8 NI-ZU 8810008660 Screw PH BT M3 ×...
  • Page 30 OPPOSITE DIRECTION TO THE MAIN UNIT MP4 (C) J1 (C) MP15 (M) MP8 (M) MP17 (M) MP16 (M) W4 (M) MP14 (M) MP2 (C) MP12 (M) MP2 (C) MP10 (F) FRONT UNIT MP9 (F) MP1 (M) R26 (F) MP9 (M) J1 (F) MP11 (F) MP18 (C)
  • Page 31 SECTION 8 SEMI-CONDUCTOR INFORMATION • TRANSSISTORS AND FET’S • DIODES 2SA1576A T106 R 2SB1123 T TD 2SC3356 T1B R25 2SC4081 T106 R 2SC4116 BL 1SS302 1SS352 1SS355 1SV217 1SV245 (Symbol: FR) (Symbol: BF) (Symbol: R25) (Symbol: BR) (Symbol: LL) (Symbol: C3) (Symbol: C1) (Symbol: A) (Symbol: T6)
  • Page 32 SECTION 9 BOARD LAYOUTS 9-1 FRONT UNIT • TOP VIEW to Microphone 9 - 1...
  • Page 33 • BOTTOM VIEW (FRONT UNIT) MP11 MP10 to MAIN unit J5 9 - 2...

  • Page 34: Main Unit ([Eur-01/-02/-12/-13/-71/-72] Only)

    9-2 MAIN UNIT ([EUR-01/-02/-12/-13/-71/-72] ONLY) CHASSIS J1 • TOP VIEW BLACK MP12 IC11 MP15[L-R] MP15[M-R] MP9,MP8 J501 MP1, MP14 to optional cables OPC-821, OPC-822 DISC MP2,MP4 PAAF HORN to optional cable OPC-617 to optional units to optional unit UT-96,UT-103, EX-1761 EEPROM UT-105,UT-109, UT-110 to FRONT unit J2...
  • Page 35 • BOTTOM VIEW (MAIN UNIT [EUR-01/-02/-12/-13/-71/-72] ONLY) MP13 MP13 MP10 MP11 MP19 9 - 4...

  • Page 36: Main Unit ([Other])

    9-3 MAIN UNIT ([OTHER]) CHASSIS J1 • TOP VIEW BLACK MP12 IC11 MP9,MP8 J501 to optional cables OPC-821, OPC-822 DISC MP2,MP4 PAAF HORN to optional cable OPC-617 to optional units to optional unit UT-96,UT-103, EX-1761 EEPROM UT-105,UT-109, UT-110 to FRONT unit J2 9 - 5...
  • Page 37 • BOTTOM VIEW (MAIN UNIT [OTHER]) MP13 MP13 MP10 MP11 9 - 6...

  • Page 38: Block Diagram

    SECTION 10 BLOCK DIAGRAM 400–520 MHz D512 DISC R8V 1st mixer SFPC455H SFPC455E-TC01 MA77 UM9401F AF OUT TX/RX M5282FP TA75W558FU D501 D502 3SK166 3SK166 DTC114EU DAN202U DAN202U FL-264 Q515 DTA144EU Q501,Q502,Q510 DTC144EU EXT SP MUTE CTRL FM IC RSSI CONT Q61 2SC4116 +18V LA4425A...

  • Page 39: Voltage Diagram

    SECTION 11 VOLTAGE DIAGRAMS 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 40: Main Unit

    11-2 MAIN UNIT MAIN UNIT(1) BUS LINE1 R148 (EXP SP) R162 +18V PLLIN PLLIN R348 1/2VDD 1/2VDD 1/2VDD UNLK 3.9k 1µ LOCK 4.97V R173 R388 R387 R172 UNLOCK 0.30V 2.2k 1.2k 2.53V R303 IC12 100k R160 1K C301 M62363FP-650C MC145190F 0.001 Note 2.45V...
  • Page 41 MAIN UNIT(2) BUS LINE1 BUS LINE1 +18V +18V +18V +18V +18V PLLIN PLLIN R135 R134 R131 2.97V 1µ 8.2k 8.2k 0.56µ C287 6.80V 2SC4081 7.90V C168 R:3.27V R:7.22V 6p[L] C167 R:2.83V T:3.40V 6.84V T:0V 4p[H],[M-R] 15p[L] R136 R132 C151 R126 R366 T:0V 0.56µ...
  • Page 42 MAIN UNIT(3) BUS LINE1 BUS LINE1 +18V R595 10k C93 220 SQL OPEN 0.87V 1.27V SQL CLOSE 4.56V C371 0.001 IC11 LA-502 6.10V LA4425A Explanatory notes SC-1322/SC-1323/SC-1324 Note C94 470 [L]: Lo-band VOLTAGE LINE [M]: Middle-band C587 47p DTC363EK [H]: Hi-band TX LINE [R]: R&TTE Type [O]: OTHER...
  • Page 43 MAIN UNIT(4) Explanatory notes BUS LINE1 1µ 1µ VOLTAGE LINE TX LINE RX LINE 0.56µ[R] R598 COMMON LINE 1µ 0.27µ[O] 1µ W:2.48V W:6.20V R599 N:2.19V N:6.32V W:6.96V 4.7k SFPC455ETC01 1.5k N:7.08V D512 MA77 120p CR-473 R385 W:0V W:0V R:7.34V 270[L-R] N:2.71V N:2.71V T:0V...

  • Page 44: Optional Unit Ut-103

    SECTION 12 OPTIONAL UNIT UT-103 • SCHEMATIC DIAGRAM • BLOCK DIAGRAM FM "OPEN" 100k PM "SHORT" C-BUS 1.8µ SIG OUT DISC IN to IC-F2610 TC4W53F SIG OUT 0.001 SIG OUT FX809LG MAIN unit J6 DISC IN FFSK AMP O 2,3,4...
  • Page 46 S-14005HZ-C1U 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan C 1999-2003 Icom Inc.

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