The Icom IC-290A/E/H maintenance manual provides detailed instructions for setting up, operating, and troubleshooting the 144MHz all-mode transceiver, including descriptions of controls, circuit diagrams, and adjustment procedures. It also includes a troubleshooting guide and voltage charts to assist with diagnosing and resolving issues with the transceiver.
Manual Overview
The Icom IC-290A/E/H Maintenance Manual provides detailed guidance for servicing the 144MHz all-mode transceiver. Key sections include troubleshooting flow, error codes, diagnostics, calibration, and adjustments. The troubleshooting guide in Section 9 outlines systematic procedures for identifying and resolving common issues, including signal loss and power discrepancies. Error codes are not explicitly detailed, but diagnostics can be inferred from circuit descriptions and voltage charts. Calibration and adjustments are covered in Section 7, with specific procedures for PLL, receiver, and transmitter adjustments, ensuring optimal performance. Board-level guidance is provided in the circuit description section, detailing the receiver, transmitter, PLL, and logic units. Disassembly instructions in Section 6 support component-level repairs. The manual emphasizes using the block diagram and voltage charts for effective diagnostics. Technicians are advised to follow the outlined steps for adjustments and use the parts list for component replacements. Overall, the manual is a comprehensive resource for maintaining and servicing the IC-290A/E/H transceiver, ensuring reliable operation through meticulous troubleshooting and precise adjustments.
Quick Issues Covered
- Diagnose power-up failures with voltage charts and troubleshooting guide.
- Adjust PLL and transmitter circuits for optimal performance.
- Trace circuits using detailed schematics in the circuit description section.
Overview
The product is a 144MHz all-mode transceiver, specifically the IC-290A/E/H model. The maintenance manual covers various sections including specifications, controls and their functions, inside views, block diagram, circuit description, disassembly, adjustments, voltage charts, troubleshooting guide, IC ratings, and parts lists.
Specifications
- Numbers of semiconductors Transistor 61
- FET 6
- IC 28
- Diode 134 (IC-290A/H : 135)
- Frequency coverage 144.000 ~ 145.9999MHz
- (IC-290A/H : 143.8000 ~ 148.1999MHz)
- Frequency resolution SSB 100Hz steps FM 5KHz steps
- 1KHz steps with 1KHz STEPS switch depressed
- Frequency control Microcomputer based 100Hz step Digital PLL synthesizer
- Independent Dual VFO Capability
- Frequency readout 5 digit LED 100Hz readout
- Frequency stability Within +1.5KHz
- Memory channels 5 channels with any inband frequency programmable
- Usable conditions Temperature: — 10°C ~ 60°C (14°F ~ 140°F}
- Operational time: Continuous
- Antenna impedance 50 ohms unbalanced
- Power supply requirement 13.8V DC + 15% (negative ground) 3.5A (IC-290H : 6A) Max.
- Current drain (at 13.8V DC) Transmitting
- SSB [PEP 10W (IC-290H : 25W)] Approx. 2.2A (IC-290H : 4.8A)
- CW, FM [10W (IC-290H : 25W)} Approx. 3.1A (IC-290H : 5.0A)
- FM (1W) Approx. 1.6A
- Receiving
- At max audio output Approx. 0.9A
- Squelched Approx. 0.7A
- Dimensions 64mm (H) x 170mm (W) x 218mm (D)
- Weight Approx. 2.5Kgs
- TRANSMITTER
- Output power SSB High 10W (PEP) (IC-290H : 25W PEP) Low 1W (PEP)
- CW,FM High 10W (IC-290H : 25W) Low 1W
- Emission mode SSB (A3J, USB/LSB), CW (A1), FM (F3)
- Modulation system SSB Balanced modulation
- FM Variable reactance frequency modulation
- Max. frequency deviation +5KHz
- Spurious emission More than 60dB below peak power output
- Carrier suppression More than 40cB below peak power output
- Unwanted sideband More than 40dB down at 1000Hz AF input
- Microphone 1.3K ohm dynamic microphone with built-in preamplifier and push-to-talk switch.
- Operating mode Simplex, Duplex
- (Any 100KHz steps inband frequency separation programmable)
- Tone burst 1750Hz +0.1Hz (IC-290A/H : Not installed)
- RECEIVER
- Receiving system SSB, CW__ Single conversion superheterodyne
- FM Double conversion superheterodyne
- Receiving mode SSB (A3J, USB/LSB), CW (A1), FM (F3)
- Intermediate frequency SSB,CW 10.75MHz
- FM 10.75MHz, 455KHz
- Sensitivity SSB, CW Less than 0.5 microvolts for 10dB S+N/N
- FM More than 30dB S+
Controls & Indicators
The front-panel controls and indicators for the 144MHz All Mode Transceiver include:
– Transmit Indicator
– Receive Indicator
– Priority Switch
– Priority Indicator
– VFO Switch
– Duplex Indicator
– Frequency Display
– S/RF Indicator
– Tone Call Switch
– Noise Blanker Switch
– Memory Channel Switch
– AGC Switch
– Channel Switch
– VFO/Memory Switch
– Offset Switch
– Mode Switch
– Mic Connector
– Memory/VFO Write Button
– Tuning Control Knob
– Squelch Control and RF Power Switch
– 1kHz Steps Switch
– RF Power Switch
– RIT Switch
– Scan Start/Stop Button
– Volume Control and Power Switch
– RIT Control
These controls allow for various operations including frequency tuning, mode selection, and power adjustments.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Service manual (PDF – 20.8 MB)
Service manual PDF for Icom IC-290A/IC-290E/IC-290H. Aids in troubleshooting, repair, and calibration. File size: 20.8 MB.
- Brand: Icom-ic-290a-ic-290e-ic-290h-service
- Model: MANUAL
- Type: Service manual
- File size: 20.8 MB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download MANUAL service manual (PDF)
Icom IC-290A / IC-290E / IC-290H Service Manual Overview
The Icom IC-290A, IC-290E, and IC-290H are versatile amateur radio transceivers designed for reliable communication across various frequency bands. These models provide users with robust performance for both mobile and base station operations, supporting multiple modulation modes and offering clear, stable transmissions. This service manual (PDF) offers detailed guidance on maintenance, repair, and technical specifications to ensure optimal functionality of your device.
Main Features and Specifications
- Frequency Coverage: VHF bands suitable for amateur radio use
- Modes Supported: FM, AM, and CW (depending on model)
- Power Output: Adjustable RF power for different operating conditions
- Built-in Squelch and Noise Blanker for improved audio clarity
- Multiple Channel Memory for quick frequency access
- Robust construction designed for mobile and base use
- External Speaker and Microphone compatibility
Basic Usage and Operation Tips
To operate the Icom IC-290 series, first ensure the device is properly connected to a suitable antenna and power source. Select the desired frequency band and mode using the front panel controls. Adjust the squelch level to eliminate background noise without cutting off weak signals. Use the memory channels to quickly access frequently used frequencies. Regularly monitor the signal strength and adjust the RF output power to maintain clear communication while conserving battery life or power supply.
Troubleshooting and Maintenance Notes
If you experience issues such as distorted audio, weak transmission, or failure to power on, consult the troubleshooting section of the service manual. Common maintenance tasks include cleaning the connectors, checking antenna connections, and verifying power supply voltage levels. Periodic inspection of internal components and calibration may be necessary to maintain optimal performance. Always use recommended replacement parts and follow the service procedures outlined in the manual.
Safety Reminder
Always disconnect the transceiver from power sources before performing any maintenance or repairs. Avoid exposing the device to moisture or extreme temperatures. Use proper grounding techniques to prevent electrical shock and interference. Follow all safety guidelines provided in the manual to ensure safe operation and prolong the lifespan of your Icom IC-290 series transceiver.