Why is the Icom Transceiver output power low?
The output power of your Icom Transceiver might be low because some channels are programmed for low power or receive only, or the output power is set to low. To resolve this, try changing channels or pushing [H/L] to select high power.
General| Brand | Icom |
|---|---|
| Model | IC-M604 |
| Category | Transceiver |
| Language | English |
Critical safety warnings for connecting power and handling the transceiver.
Covers frequency coverage, mode, power supply, temperature, dimensions, and weight.
Details output power, modulation, frequency deviation, stability, and emissions.
Details receive system, IF, sensitivity, selectivity, and audio output.
Identifies major components and boards within the main and logic units.
Shows top and bottom views of the HM-157 microphone's internal components.
Step-by-step guide for safely opening the transceiver casing.
Instructions for detaching the Logic Unit, Main Unit, and AF Unit.
Explains antenna switching, RF amplification, and mixer/IF stages.
Details microphone amplifier, modulation, pre-drive, and power amplifier circuits.
Describes Phase-Locked Loop operation for frequency synthesis.
Covers ATIS/DSC modulation and related signal processing.
Explains the CPU, system clock, and reset functions.
Details voltage lines and regulators within the main unit.
Describes pin assignments for expander ICs on AF and other units.
Lists required test equipment and connection setup for adjustments.
Procedure for adjusting PLL lock voltage for TX and RX.
Steps for setting receiver sensitivity for different channels.
Lists replacement parts for the IC-M604 and its front unit.
Lists components for the logic board.
Lists components for the audio frequency unit.
Lists components for the main circuit board.
Lists parts for optional accessories.
Lists chassis and front unit mechanical components for the IC-M604.
Lists mechanical parts for logic, AF, and connect units.
Lists mechanical components for the HM-126RB/RG and HM-157 accessories.
Displays symbols and common types for transistors and FETs used.
Displays symbols and common types for diodes used in the device.
Top and bottom views showing component placement on VR, SQL, Dial, and Connect units.
Top and bottom views illustrating component placement on the logic board.
Top and bottom views showing component placement on the main unit's PCB.
Top and bottom views illustrating component placement on the AF unit's PCB.
Top and bottom views of HM-126RB/RG and HM-157 microphone PCBs.
Shows voltage distribution and levels on the logic unit.
Illustrates voltage distribution and levels on the main unit.
Shows voltage distribution and levels on the AF unit.
Displays voltage diagrams for HM-126RB/RG and HM-157 microphones.
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