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Icom IC-E90 - Service Manual

Icom IC-E90
57 pages
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S-13903MZ-C2
2002 Icom Inc.
1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan
MULTIBAND FM TRANSCEIVER
ie90
ic-e90
IC-E90 (1,4)

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Questions and Answers

  • M
    Martha PottsJul 26, 2025
    How to fix Icom Transceiver when no power comes on?
    • A
      Angel MosleyJul 26, 2025
      If your Icom Transceiver isn't powering on, the batteries may be exhausted or the battery polarity might be reversed. Try replacing the batteries or charging the battery pack. Also, check to ensure the battery polarity is correct.
  • A
    Alec MartinezJul 30, 2025
    What to do if Icom Transceiver transmitting is impossible?
    • J
      Jeffrey ChambersJul 30, 2025
      If you cannot transmit with your Icom Transceiver, it may be due to exhausted batteries or the frequency being set outside of the 50/144/430 MHz amateur band. Replace the batteries or charge the battery pack. Also, reset the frequency to be within the 50/144/430 MHz amateur bands.
  • A
    April MartinezAug 3, 2025
    Why no sound from Icom Transceiver speaker?
    • C
      Christina ArmstrongAug 3, 2025
      If no sound is coming from the speaker of your Icom Transceiver, the volume level might be too low, or a different tone may be selected with tone/DTCS squelch. Increase the volume level by pushing [Y] to obtain a suitable level. Check the tone using tone/DTCS scan.
  • N
    Nicholas MorenoAug 8, 2025
    What to do if no contact possible with another station on Icom Transceiver?
    • R
      Rachel RowlandAug 8, 2025
      If you cannot contact another station using your Icom Transceiver, a different tone may be selected with tone/DTCS squelch. Check the tone using tone scan.
  • R
    Raymond JacobsAug 12, 2025
    Why is the tuning dial or [Y]/[Z] function strange on my Icom Transceiver?
    • A
      Andrew MartinezAug 12, 2025
      If the tuning dial and [Y]/[Z] functions are acting strangely on your Icom Transceiver, it could be because these functions are exchanged. Push [1 V?D] for 1 second to cancel the function.
  • S
    Stacy ContrerasAug 16, 2025
    Why is receive audio distorted on my Icom Transceiver?
    • J
      Jennifer EdwardsAug 16, 2025
      If the receive audio is distorted on your Icom Transceiver, the operating mode may not be selected correctly. Select a suitable operating mode in set mode.
  • L
    Lindsey BrownAug 21, 2025
    What to do if desired set mode item cannot be selected on Icom Transceiver?
    • A
      Angela WilliamsAug 21, 2025
      If you cannot select the desired set mode item on your Icom Transceiver, it may be in expanded set mode 1 or 2, or some set mode items can only be selected from VFO or memory mode. Turn the expanded set mode 1 or 2 ON. Enter set mode from the appropriate operating mode.

Summary

Introduction and Safety

Safety Warnings

Critical safety warnings for transceiver operation.

Repair Guidelines

Essential guidelines for safe and effective transceiver repair.

Specifications Overview

General Device Specifications

Detailed technical specifications for the transceiver's general features.

Transmitter Performance Specifications

Technical details regarding the transceiver's transmitting capabilities.

Receiver Performance Specifications

Technical details regarding the transceiver's receiving capabilities.

Disassembly Procedures

Rear Panel Disassembly Steps

Step-by-step guide to remove the rear panel.

Logic, AF, RF Unit Disassembly

Steps for removing logic, AF, and RF units.

Circuitry Description

Receiver Circuitry Details

Detailed explanation of the transceiver's receiver circuit functions.

AF Amplifier Circuit Function

Detailed explanation of the AF amplifier circuit.

Drive;Power Amplifier Circuit Details

Explanation of drive and power amplifier circuits in the RF unit.

RF Circuitry Details

Description of the RF circuit's function and components.

Squelch Circuit Functionality

Explanation of noise and tone squelch circuit functionality.

1 st Mixer and IF Circuit Operation

Description of 1st mixer and IF circuit operations.

2 nd IF and Demodulator Circuit Operation

Explanation of 2nd IF and demodulator circuit functions.

Transmitter Circuitry Overview

Overview of the transceiver's transmitter circuit functions.

Adjustment Procedures

Trimmer Adjustments

Adjustment Mode Settings

Block Diagrams

Icom IC-E90 Specifications

General IconGeneral
TypeHandheld Transceiver
ModulationFM
Channels200
DisplayLCD
Battery LifeApprox. 10 hours
Dimensions58 mm
WaterproofIPX7

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