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Icom IC-A25N Service Manual
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Icom IC-A25N Service Manual

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Table of Contents

|A25N/|A25C/|A25NE/|A25CE
NOTE: Use these amended pages as one addendum set.
Do not mix them up with the previous master pages.
Replacement page
Addendum page
Amended page
CONTENTS
SPECIFICATIONS ........................................................................ 1-1a
ADJUSTMENT PROCEDURE ............................................. 4-1a to 4-6a
PARTS LIST ..................................................................... 5-1a to 5-19a
MECHANICAL PARTS ...................................................... 6-1a to 6-3a
BOARD LAYOUTS ...............................................................7-1a to 7-8a
[VERSION LIST]
MODEL
IC-A25N
IC-A25NE
IC-A25N
IC-A25C
IC-A25CE
IC-A25C
IC-A25CE
IC-A25C
*
Newly added versions.
Unit installed
✔
March 2019
SERVICE MANUAL
ADDENDUM
The page to replace the original one.
The page to be added to the original set.
The page to be added as change history, including corrections.
VERSION
VOR/
VERSION
NUMBER
GPS
USA-01
#11
✔
EXP-01
#12
✔
EUR-01
#13
✔
AUS-01
#14
✔
*
USA-02
#16
✔
*
EXP-02
#17
✔
USA-01
#21
‒
EXP-01
#22
‒
EUR-01
#23
‒
AUS-01
#24
‒
*
EXP-02
#27
‒
*
USA-02
#31
‒
*
EUR-02
#33
‒
*
AUS-02
#34
‒
*
USA-03
#36
‒
Definitions
LOGIC
MAIN
Bluetooth WX
Unit
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✔
LOGIC-1
MAIN-1
Unit
Unit
Unit
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  • Page 1 MAIN LOGIC-1 MAIN-1 MODEL VERSION Bluetooth WX NUMBER Unit Unit Unit Unit USA-01 ‒ ‒ ✔ ✔ ✔ ✔ ✔ IC-A25N EXP-01 ‒ ‒ ✔ ✔ ✔ ✔ ✔ EUR-01 ‒ ‒ ‒ ✔ ✔ ✔ ✔ IC-A25NE AUS-01 ‒...
  • Page 2 The input signal strength level of this receive sensitivity is measured at the load end (PD). Measurements made in accordance with FCC Part87 (IC-A25N and IC-A25C), or EN300 676 (IC-A25NE and IC-A25CE). All stated specifications are typical and subject to change without notice or obligation.
  • Page 3 (Replacement page) March 2019 SECTION 4 ADJUSTMENT PROCEDURE The underlined parts have been updated from the previous version of the addendum, or the original page. 4-1 PREPARATION ■ REQUIRED EQUIPMENT EQUIPMENT SPECIFICATIONS EQUIPMENT SPECIFICATIONS Output voltage: 11 V CS-A25 Programming software DC power supply Programming software Current capacity:...
  • Page 4 (Replacement page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. ■ ENTERING THE ADJUSTMENT MODE 1. Right click the CS-A25's icon on the desktop and select 8. Write the data to the transceiver. the "Properties."...
  • Page 5 (Replacement page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. ■ KEY ASSIGNMENTS FOR THE ADJUSTMENT ■ WRITE THE CLONING DATA MODE After adjusting, write back save the cloning data. •...
  • Page 6 (Replacement page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. 4-2 FREQUENCY AND TRANSMIT ADJUSTMENTS 1. Select an adjustment item by pushing [▲]/[▼]. 2. Set or modify the adjustment value as specified by rotating [DIAL], and then push [ENT]. ADJUSTMENT TRANSCEIVER'S ADJUSTMENT...
  • Page 7 (Replacement page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. 4-2 FREQUENCY AND TRANSMIT ADJUSTMENTS (CONTINUED) 1. Select an adjustment item by pushing [▲]/[▼]. 2. Set or modify the adjustment value as specified by rotating [DIAL], and then push [ENT]. ADJUSTMENT TRANSCEIVER'S ADJUSTMENT...
  • Page 8 † VOR 0° VOR0 • Frequency: 108.000 MHz Connect the VOR tester to the Push [ENT] • Receiving antenna connector, and set it to: (Automatic (Only for IC-A25N) Frequency: 108.000 MHz adjustment) Level: +47 dBμ (−60 dBm) † Modulation: 30 Hz...
  • Page 9 (Amended page) March 2019 PARTS LIST The underlined parts have been updated from the previous version of the addendum, or the original page. [LOGIC UNIT] (for #11, #12, #21, #22, and #31) [LOGIC UNIT] (for #11, #12, #21, #22, and #31) PART PART DESCRIPTION...
  • Page 10 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [LOGIC UNIT] (for #11, #12, #21, #22, and #31) [LOGIC UNIT] (for #11, #12, #21, #22, and #31) PART PART DESCRIPTION DESCRIPTION...
  • Page 11 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [LOGIC UNIT] (for #11, #12, #21, #22, and #31) [LOGIC UNIT] (for #11, #12, #21, #22, and #31) PART PART DESCRIPTION DESCRIPTION...
  • Page 12 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN UNIT] (for #11, #12, #21, #22, and #31) [MAIN UNIT] (for #11, #12, #21, #22, and #31) PART PART DESCRIPTION DESCRIPTION...
  • Page 13 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN UNIT] (for #11, #12, #21, #22, and #31) [MAIN UNIT] (for #11, #12, #21, #22, and #31) PART PART DESCRIPTION DESCRIPTION...
  • Page 14 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN UNIT] (for #11, #12, #21, #22, and #31) [MAIN UNIT] (for #11, #12, #21, #22, and #31) PART PART DESCRIPTION DESCRIPTION...
  • Page 15 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN UNIT] (for #11, #12, #21, #22, and #31) [MAIN UNIT] (for #11, #12, #21, #22, and #31) PART PART DESCRIPTION DESCRIPTION...
  • Page 16 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN UNIT] (for #11, #12, #21, #22, and #31) [MAIN UNIT] (for #11, #12, #21, #22, and #31) PART PART DESCRIPTION DESCRIPTION...
  • Page 17 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [LOGIC-1 UNIT] [LOGIC-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 18 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [LOGIC-1 UNIT] [LOGIC-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 19 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [LOGIC-1 UNIT] [LOGIC-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 20 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [LOGIC-1 UNIT] [LOGIC-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 21 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [LOGIC-1 UNIT] [LOGIC-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 22 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN-1 UNIT] [MAIN-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 23 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN-1 UNIT] [MAIN-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 24 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN-1 UNIT] [MAIN-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 25 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN-1 UNIT] [MAIN-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 26 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN-1 UNIT] [MAIN-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 27 (Amended page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [MAIN-1 UNIT] [MAIN-1 UNIT] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART PART DESCRIPTION...
  • Page 28 (Replacement page) March 2019 SECTION 6 MECHANICAL PARTS The underlined parts have been updated from the previous version of the addendum, or the original page. [CHASSIS UNIT] [CHASSIS UNIT] PART PART DESCRIPTION QTY. DESCRIPTION QTY. 2510002150 C36N07M-7 MP44 8930098420 SPONGE (PK) MP45 8930098420 SPONGE (PK) MP46...
  • Page 29 (Replacement page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. [LOGIC-1 UNIT] [ACCESSORIES] ( for #13, #14, #16, #17, #23, #24, #27, #33, #34, and #36) PART DESCRIPTION QTY. PART DESCRIPTION QTY.
  • Page 30 (Replacement page) March 2019 The underlined parts have been updated from the previous version of the addendum, or the original page. MP26 (CHASSIS) MP18 (CHASSIS) (8850003421) (Refere to the parts list.) J1 (CHASSIS) MP12 (CHASSIS) EP1 (CHASSIS) (6510027690) Apply the grease to the following area of the front panel (8930096820) (Refere to the parts list.) MP27 (CHASSIS)
  • Page 31 (Amended page) March 2019 BOARD LAYOUTS The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. The underlined parts have been updated from the previous version of the addendum, or the original page. •...
  • Page 32 (Amended page) March 2019 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. The underlined parts have been updated from the previous version of the addendum, or the original page. •...
  • Page 33 (Amended page) March 2019 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. The underlined parts have been updated from the previous version of the addendum, or the original page. •...
  • Page 34 (Amended page) March 2019 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. The underlined parts have been updated from the previous version of the addendum, or the original page. •...
  • Page 35 (Amended page) March 2019 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. The underlined parts have been updated from the previous version of the addendum, or the original page. •...
  • Page 36 (Amended page) March 2019 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. The underlined parts have been updated from the previous version of the addendum, or the original page. •...
  • Page 37 (Amended page) March 2019 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. The underlined parts have been updated from the previous version of the addendum, or the original page. •...
  • Page 38 (Amended page) March 2019 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. The underlined parts have been updated from the previous version of the addendum, or the original page. •...
  • Page 39 SERVICE MANUAL VHF AIR BAND TRANSCEIVERS iA25N iA25C iA25NE iA25CE S-15419XZ-C1 December 2017...
  • Page 40 7. READ the instructions of the test equipment thoroughly 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, Australia, New Zealand, and/or other countries.

  • Page 41: Table Of Contents

    TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY INSTRUCTION SECTION 4 ADJUSTMENT PROCEDURES 4-1 PREPARATION ………………………………………………………………………………………… 4-1 4-2 FREQUENCY AND TRANSMIT ADJUSTMENTS ………………………………………………… 4-3 4-3 RECEIVE ADJUSTMENTS …………………………………………………………………………… 4-4 SECTION 5 PARTS LIST SECTION 6 MECHANICAL PARTS SECTION 7 BOARD LAYOUT...

  • Page 42: Specifications

    SECTION 1 SPECIFICATIONS IC-A25N IC-A25C IC-A25NE IC-A25CE Frequency coverage (Unit: MHz) 118.000~136.99166 108.000~ 118.000~ 108.000~ 118.000~ 136.99166 136.99166 136.99166 136.99166 161.650~163.275 – Channel spacing 25 kHz/8.33 kHz Type of emission 6K00A3E/5K60A3E, 6K80A3E/5K00A3E 16K0G3E (WX) Number of memory channels 300 channels Usable temperature range –10°C~+60°C, +14°F~+140°F...

  • Page 43: Inside Views

    SECTION 2 INSIDE VIEWS • LOGIC/LOGIC-1 UNIT (TOP VIEW) GPS Antenna* BT Regulator* Bluetooth module* (IC30) (IC1) *Only for IC-A25N...
  • Page 44 • LOGIC/LOGIC-1 UNIT (BOTTOM VIEW) GPS Module (IC17)* † Inside the shield case CPU (IC27) † Under the shield plate Clock Oscillator (X1) † Under the shield plate 5 V Regulator (IC40) (for LCD Backlight) *Only for IC-A25N...
  • Page 45 † Under the shield plate 2nd IF Filter (FI2: for Wide) Discriminator (X1) D/A Converter (IC216) MIC Switch (IC231) Tx/Rx VCO Circuits D/A Converter (IC220) Audio Volume (IC229) ALC Amplifier (IC215) Internal Microphone (MC1) [DC 11V] (J1) *Only for IC-A25N...
  • Page 46 • MAIN-A UNIT (BOTTOM VIEW) RF Amplifier (Q11) 1st Mixer (Q12) 1st IF Filter (FI1: for Wide) 1st IF Filter (FI2: for Narrow) 1st IF Amplifier (Q13) IF IC (IC1) Pre-Drive Amplifier Reference Oscillator (Q4) (X203) AM/FM Switch (IC2) PLL IC (IC203) VCO Switch (Q57) Shift Resistor (IC5) Lowpass Filter (IC223)

  • Page 47: Disassembly Instruction

    Remove 2 dial knobs and antenna nut from the Use a suction lifter to lift the bottom of the CHASSIS up. front panel. Inner dial Antenna nut Remove with; Outer dial “ICOM Driver (K)” (8960000112) Suction lifter • Part name: EA950R-2 • Manufacture: ESCO CO.LTD Suction lifter Remove 2 screws from the bottom of chassis.
  • Page 48 2. REMOVING THE MAIN/-1 UNIT Unsolder 11 points on the shield plate, and then Remove 11 screws from the MAIN/-1 UNIT, and remove it. then remove it from the chassis. Screws×11 UNSOLDER Solder remover Shield plate MAIN/-1 UNIT MAIN/-1 UNIT Chassis Unsolder a point at the antenna connector.

  • Page 49: Adjustment Procedures

    SECTION 4 ADJUSTMENT PROCEDURE 4-1 PREPARATION REqUIRED EqUIPMENT ■ EqUIPMENT SPECIFICATIONS EqUIPMENT SPECIFICATIONS Output voltage: 11 V CS-A25 Programming software DC power supply Programming software Current capacity: 5 A or more (Revision 1.0 or later) Battery pack BP-288 (Fully charged) Programming cable OPC-478UC Measuring range: 0.1~5 W...
  • Page 50 ENTERING THE ADJUSTMENT MODE ADJUSTMENT MODE SCREEN ■ ■ Right click the CS-A25's icon on the desktop and select the "Properties." • The CS-A25 properties window appears. Append " /Expert" to the end of the contents of the Target field, and then click [OK]. •...

  • Page 51: Frequency And Transmit Adjustments

    4-2 FREqUENCY AND TRANSMIT ADJUSTMENTS Select an adjustment item by pushing [ Y]/[Z]. Set or modify the adjustment value as specified by rotating [DIAL], and then push [ENT]. ADJUSTMENT ADJUSTMENT TRANSCEIVER'S CONDITION OPERATION VALUE ITEM NAME REFERENCE • Frequency: 136.975 MHz •...

  • Page 52: Receive Adjustments

    Level: +10 dBμ (−97 dBm) † VOR 0° VOR0 • Frequency: 108.000 MHz Connect the VOR tester to the Push [ENT] (Only for IC-A25N) • Receiving antenna connector, and set as shown (Automatic below: adjustment) Frequency: 108.000 MHz Level: +47 dBμ...

  • Page 53: Parts List

    SECTION 5 PARTS LIST [LOGIC UNIT] (for #11, #12, #21, and #22) [LOGIC UNIT] (for #11, #12, #21, and #22) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION 1190004712 S.IC HRM1016-010022 [#11] T 37.3/13.5 7030015970 S.RES RMC1/16S-103JTH (10 k) [#11] B 5.9/10.2 1190004712 S.IC HRM1016-010022 [#12]...
  • Page 54 [LOGIC UNIT] (for #11, #12, #21, and #22) [LOGIC UNIT] (for #11, #12, #21, and #22) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION R882 7030015970 S.RES RMC1/16S-103JTH (10 k) 29.6/16.9 R1017 7030014400 S.RES MCR006YZPJ 100 (10) 31.0/57.7 R883 7030016380 S.RES RMC1/16S-183JTH (18 k) 30.9/17.3 R1018 7030014400 S.RES...
  • Page 55 [LOGIC UNIT] (for #11, #12, #21, and #22) [LOGIC UNIT] (for #11, #12, #21, and #22) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION 4030023010 S.CER 0402B104K160CT 29.0/28.1 C678 4030023090 S.CER 0402B102K500CT 31.5/41.9 4030023010 S.CER 0402B104K160CT 25.7/34.5 C679 4030023090 S.CER 0402B102K500CT 37.1/56.1 C101 4030023090 S.CER 0402B102K500CT [#11] B...
  • Page 56 [MAIN UNIT] (for #11, #12, #21, and #22) [MAIN UNIT] (for #11, #12, #21, and #22) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION 1110007300 S.IC NJM2552V-TE1-#ZZZB 35.6/72.6 1750001810 S.DIO L1SS400T1G 42.2/112.7 1130009981 S.IC TC7W53FK (TE85LF) 33.1/63.1 1750001771 S.VAR 1SV323H3F 19.4/41.5 1130011760 S.IC CD4094BPWR 39.9/44.3 1750002170 S.DIO...
  • Page 57 [MAIN UNIT] (for #11, #12, #21, and #22) [MAIN UNIT] (for #11, #12, #21, and #22) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION 7030015780 S.RES RMC1/10-331JTP (330) 12.2/105.2 R231 7030016560 S.RES RMC1/16SJPTH 37.1/32.8 7030015930 S.RES RMC1/16S-471JTH (470) 6.0/74.2 R252 7030016560 S.RES RMC1/16SJPTH 25.5/44.4 7030016290 S.RES...
  • Page 58 [MAIN UNIT] (for #11, #12, #21, and #22) [MAIN UNIT] (for #11, #12, #21, and #22) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION R488 7030018520 S.RES RMC1/16SK564FTH (560 k) 11.3/34.4 R645 7030016020 S.RES RMC1/16S-104JTH (100 k) 39.7/47.0 R489 7030016930 S.RES RMC1/16SK274DTH (270 k) 12.1/33.2 R646 7030016020 S.RES...
  • Page 59 [MAIN UNIT] (for #11, #12, #21, and #22) [MAIN UNIT] (for #11, #12, #21, and #22) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION C100 4030023200 S.CER 0402B471K500CT 29.9/69.0 C377 4030022620 S.CER 0402N0R5B500CT 10.2/49.3 C101 4030019560 S.CER GRM21BB31C106KE15L 36.5/78.1 C379 4030023330 S.CER 0603N4R0B500CT 16.8/43.8 C102 4030023200 S.CER 0402B471K500CT...
  • Page 60 [MAIN UNIT] (for #11, #12, #21, and #22) [MAIN UNIT] (for #11, #12, #21, and #22) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION C538 4520000020 S.NIO NOJC227M006RWJV 30.3/26.1 C680 4030023010 S.CER 0402B104K160CT [#11] T 32.7/86.6 C539 4030023090 S.CER 0402B102K500CT 41.3/96.4 4030023010 S.CER 0402B104K160CT [#12] C541 4030021240 S.CER C1005 JB 1C 105K-T...
  • Page 61 [LOGIC-1 UNIT] (for #13, #14, #23, and #24) [LOGIC-1 UNIT] (for #13, #14, #23, and #24) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION 7030016360 S.RES RMC1/16S-123JTH (12 k) [#13] B 2.8/14.3 1190004712 S.IC HRM1016-010022 [#13] T 37.3/13.5 7030016360 S.RES RMC1/16S-123JTH (12 k) [#14] 1190004712 S.IC HRM1016-010022 [#14]...
  • Page 62 [LOGIC-1 UNIT] (for #13, #14, #23, and #24) [LOGIC-1 UNIT] (for #13, #14, #23, and #24) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION R907 7030014460 S.RES MCR006YZPJ 101 (100) 39.2/50.1 R1028 7030014400 S.RES MCR006YZPJ 100 (10) 34.3/59.5 R908 7030016060 S.RES RMC1/16S-105JTH (1 M) 37.1/52.9 R1029 7030014400 S.RES...
  • Page 63 [LOGIC-1 UNIT] (for #13, #14, #23, and #24) [LOGIC-1 UNIT] (for #13, #14, #23, and #24) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION C105 4030019560 S.CER GRM21BB31C106KE15L [#13] B 21.3/31.5 C693 4030022940 S.CER 0402B104K100CT 16.4/15.5 4030019560 S.CER GRM21BB31C106KE15L [#14] C694 4030023090 S.CER 0402B102K500CT [#13] B 18.8/82.1 C106...
  • Page 64 [MAIN-1 UNIT] (for #13, #14, #23, and #24) [MAIN-1 UNIT] (for #13, #14, #23, and #24) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION 1110007300 S.IC NJM2552V-TE1-#ZZZB 35.6/72.6 1750002170 S.DIO DB2S31400L 27.3/69.9 1130009981 S.IC TC7W53FK (TE85LF) 33.1/63.1 1790001622 S.DIO 1SV308L3F 13.2/102.3 1130011760 S.IC CD4094BPWR 39.9/44.3 1750001771 S.VAR...
  • Page 65 [MAIN-1 UNIT] (for #13, #14, #23, and #24) [MAIN-1 UNIT] (for #13, #14, #23, and #24) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION 7030016290 S.RES RMC1/16S-222JTH (2.2 k) 6.8/70.9 R253 7030016490 S.RES RMC1/16S-391JTH (390) 24.6/44.4 7030016290 S.RES RMC1/16S-222JTH (2.2 k) 9.0/70.9 R254 7030015960 S.RES RMC1/16S-472JTH (4.7 k)
  • Page 66 [MAIN-1 UNIT] (for #13, #14, #23, and #24) [MAIN-1 UNIT] (for #13, #14, #23, and #24) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION R490 7030005850 S.RES RR0510P-563-D (56 k) 13.9/29.9 R646 7030016020 S.RES RMC1/16S-104JTH (100 k) 38.8/47.6 R491 7030007610 S.RES RR0510P-683-D (68 k) 12.4/27.6 R647 7030016020 S.RES...
  • Page 67 [MAIN-1 UNIT] (for #13, #14, #23, and #24) [MAIN-1 UNIT] (for #13, #14, #23, and #24) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION C100 4030023200 S.CER 0402B471K500CT 29.9/69.0 C376 4030023090 S.CER 0402B102K500CT 32.9/50.0 C101 4030019560 S.CER GRM21BB31C106KE15L 36.5/78.1 C377 4030022620 S.CER 0402N0R5B500CT 10.2/49.3 C102 4030023200 S.CER 0402B471K500CT...
  • Page 68 [MAIN-1 UNIT] (for #13, #14, #23, and #24) [MAIN-1 UNIT] (for #13, #14, #23, and #24) PART PART DESCRIPTION DESCRIPTION LOCATION LOCATION C537 4030023010 S.CER 0402B104K160CT 30.5/33.8 C676 4030023090 S.CER 0402B102K500CT 19.3/79.5 C538 4520000020 S.NIO NOJC227M006RWJV 30.3/24.2 C677 4030019560 S.CER GRM21BB31C106KE15L [#13] B 24.5/68.6 C539...

  • Page 69: Mechanical Parts

    SECTION 6 MECHANICAL PARTS [CHASSIS PARTS] [LOGIC UNIT] (for #11, #12, #21, and #22) PART PART DESCRIPTION qTY. DESCRIPTION qTY. 6510027690 BNC-R170 (A) 6510030220 50RF-JMCS-G-1B-TF (N) (LF) (SN) 6510031390 15FXVL-RSM1-GAN-TF-1 (HF) 6510023480 AYU1-1P-02676-120-TF [#11] 2510002150 C36N07M-7 6510023480 AYU1-1P-02676-120-TF [#12] 6510031380 31FXVL-RSM1-GAN-TF-1 (HF) 8900009640 OPC-963 5030004360 TM128160D1CIWUGND 3310005090 GNBA-A13A...
  • Page 70 [LOGIC-1 UNIT] (for #13, #14, #23, and #24) [ACCESSORIES] PART PART DESCRIPTION qTY. DESCRIPTION qTY. 6510030220 50RF-JMCS-G-1B-TF (N) (LF) (SN) – OPC-2379 [#11] † 6510031390 15FXVL-RSM1-GAN-TF-1 (HF) – OPC-2379 [#13] † 6510023480 AYU1-1P-02676-120-TF [#13] – OPC-2379 [#14] † 6510023480 AYU1-1P-02676-120-TF [#14] –...
  • Page 71 MP26 (CHASSIS) EP1 (CHASSIS) (8850003421) (Refere to the parts list.) J1 (CHASSIS) MP12 (CHASSIS) MP18 (CHASSIS) (6510027690) Apply the grease to the following area of the front panel (8930096820) (Refere to the parts list.) Used grease: G501 (80G) SHINETSU (8950002750) MP27 (CHASSIS) MP32 (CHASSIS) (8930098360)

  • Page 72: Board Layout

    SECTION 7 BOARD LAYOUT The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. • LOGIC UNIT (B-8813: Top view) G-TXD G-RXD • MAIN UNIT (B-8812: Top view) [MIC] [SP] [DC 11 V] CPU3V FINED...
  • Page 73 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. [DIAL/VOL] • LOGIC UNIT (B-8813: Bottom view) R862 R861 R1059 C633 • MAIN UNIT (B-8812: Bottom view) R1061 C637 R860 R859 R857 [DC 11 V] (J1)
  • Page 74 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. • LOGIC-1 UNIT (B-8816: Top view) G-TXD G-RXD • MAIN UNIT (B-8801a: Top view) CPU3V [MIC] [SP] [DC 11 V] FINED BTRXD BTTXD...
  • Page 75 The actual configuration of the PC board can be seen by viewing the top and bottom BOARD LAYOUT pages together. [DIAL/VOL] • LOGIC UNIT (B-8813: Bottom view) R862 R861 R1059 C633 • MAIN UNIT (B-8812: Bottom view) R1061 C637 R860 R859 R857 [DC 11 V] (J1)

  • Page 76: Block Diagram

    SECTION 8 BLOCK DIAGRAM VORON CERAMIC VORON IC25 IC241 IC24,Q68 0.450 MHz VORDET AM_DET NARROW2 RF_AGC CERAMIC XTAL 46.35 MHz 0.450 MHz Tx: 118.000~136.9916 MHz Rx: 108.000~136.9916 MHz 161.650~163.275 MHz D15,D16 D13,D50 VORON CERAMIC D62,D91,D93,D94, XTAL Q54,Q68,Q243 46.35 MHz 0.450 MHz D1,D8,D14,D44 ANLC GAIN...

  • Page 77: Voltage Diagram

    VORON IC37 VOL_IN R983 R1030 PSTB R981 3.4 V Displayed frequency 108.000~117.975 MHz: 3.3 V GT24C128B 118.000~136.99166 MHz: 0 V R1081 *IC-A25N only EDATA IC38 C682 *Q15 0.068 VOR3.3V VOUT 3.3 V NJU7704F3 LIGHT Displayed frequency 108.000~117.975 MHz: 3.4 V 118.000~136.99166 MHz: 0 V...
  • Page 78 VOUT Explanatory notes ON: 3.3 V *IC31 OFF: 0 V TX Line GPS Set (in the Menu) *IC-A25N only ON: 3.3 V RX Line OFF: 0 V 5.0 V Voltage Line *IC-A25N only *Refer to the PARTS LIST for the value and name of component.
  • Page 79 • MAIN UNIT (1/4) PATMP PATMP 2SC4116 5.0 V Q217 BLM15BD102SN1 LDTC144EE 2.2k EP13 R130 RX-VCO SHIFT C338 PLLSW 2SC5086 R456 DMA561030 C316 C156 PSTB R457 PSTB 0.75P PDATA PDATA 0.001 Q216 UNLK LDTC144EE UNLK 4.7U 2SC5108 100k R462 C2012C BLM15BD102SN1 EP14 12.8 MHz...
  • Page 80 • MAIN UNIT (2/4) PATMP 3.1 V DMC501010 2SB798 • External DC power TX: 10.2 V RX: 0 V • Battery pack TX: 6.8 V RX: 0 V 23.5N 220P 0.001 0.001 52.0N 1SV307 RD12MVS1 R219 RD01MUS2B *R27 3699 3.3k MT3S20P R320 R322...
  • Page 81 • MAIN UNIT (3/4) R443 DMG564050 NJM2904CRB1 NJU72341V R499 C567 IC232 LDTC144EE Q236 4.7k VREF MUTE R593 R227 R225 C242 NARROW OUT2 IC215 C643 OUT1 GAIN1 GAIN2 GAINSW NJM2904CRB1 IC229 IC231 SENSE C641 CD4094BPWR C566 BUFFIN VREF BUFFGAIN BUFFOUT IC232 R231 MPZ2012S331A NJM2783V...
  • Page 82 • MAIN UNIT (4/4) 3.0 V 3.3 V 5.0 V 3.0 V EP20 PSTB PSTB 5.0 V 5.0 V PDATA L1SS400 BLM15BD102SN1 PDATA EP19 EP21 UNLK BLM15BD102SN1 UNLK BLM15BD102SN1 R473 EP18 IC238 R604 BLM15BD102SN1 L1SS400 VOUT 100k R469 ON/OFF 100k S-1200B33 RSTN VIN1...
  • Page 83 VORON IC37 R983 R1030 VOL_IN PSTB R981 3.4 V Displayed frequency 108.000~117.975 MHz: 3.3 V GT24C128B 118.000~136.99166 MHz: 0 V R1081 *IC-A25N only EDATA SKRTLAE010 IC38 C682 *Q15 0.068 VOUT 3.3 V NJU7704F3 SKRTLAE010 LIGHT Displayed frequency 108.000~117.975 MHz: 3.4 V 118.000~136.99166 MHz: 0 V...
  • Page 84 Explanatory notes VOUT ON: 3.3 V *IC31 OFF: 0 V TX Line GPS Set (in the Menu) *IC-A25N only ON: 3.3 V RX Line OFF: 0 V 5.0 V Voltage Line *IC-A25N only *Refer to the PARTS LIST for the value and name of component.
  • Page 85 • MAIN-1 UNIT (1/4) PATMP 2SC4116 Q217 5.0 V BLM15BD102SN1 LDTC144EE EP13 2.2k R130 RX-VCO SHIFT C338 PLLSW 2SC5086 R456 DMA561030 C316 C156 PSTB R457 PSTB 0.75P PDATA PDATA 0.001 Q216 UNLK LDTC144EE 4.7U UNLK 2SC5108 100k R462 C2012C BLM15BD102SN1 EP14 12.8 MHz R460...
  • Page 86 • MAIN-1 UNIT (2/4) PATMP 3.1 V DMC501010 2SB798 • External DC power TX: 10.2 V EX: 0 V • Battery pack TX: 6.8 V RX: 0 V 52.0N 23.5N 220P 0.001 0.001 1SV307 RD12MVS1 R219 RD01MUS2B *R27 3.3k MT3S20P R320 R322 C649...
  • Page 87 • MAIN-1 UNIT (3/4) R443 DMG564050 NJM2904CRB1 NJU72341V R499 C567 IC232 LDTC144EE Q236 4.7k VREF MUTE R227 R593 R225 C242 NARROW OUT2 IC215 C643 OUT1 GAIN1 GAIN2 GAINSW NJM2904CRB1 IC229 IC232 IC231 SENSE C641 CD4094BPWR C566 BUFFIN VREF BUFFGAIN BUFFOUT R682 R231 NJM2783V...
  • Page 88 • MAIN-1 UNIT (4/4) 3.0 V 3.3 V 5.0 V 3.0 V EP20 PSTB PSTB 5.0 V 5.0 V PDATA L1SS400 BLM15BD102SN1 PDATA EP19 EP21 UNLK BLM15BD102SN1 UNLK BLM15BD102SN1 EP18 R473 IC238 BLM15BD102SN1 R604 L1SS400 VOUT 100k R469 100k ON/OFF S-1200B33 RSTN VIN1...
  • Page 89 DISTRIBUTORS ADDRESS If you have any inquiries regarding service, contact your distributor. The contact number or E-mail address of your distributor can be found on our website. http://www.icom.co.jp/world/...
  • Page 90 S-15419XZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan © 2017 Icom Inc.

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