ICM502D - Talkie Walkie ICOM - Free user manual and instructions
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| Product Type | Fixed-mount VHF Marine Transceiver |
| Brand | ICOM |
| Model | ICM502D |
| Frequency Range | 156.025–157.425 MHz (Tx/Rx) |
| Channels | All international marine channels, plus 10 private channels |
| Output Power | High: 25W, Low: 1W |
| Power Supply | 13.8 V DC (negative ground) |
| Current Drain | Tx: 5.5A (25W) / 1.5A (1W), Rx: 1.0A (max audio) |
| Dimensions (W×H×D) | 150 × 70 × 188 mm (excluding projections) |
| Weight | Approx. 1.2 kg |
| Waterproof Rating | IPX7 (submersible to 1 meter for 30 minutes) |
| Built-in GPS | Yes (internal GPS receiver for DSC) |
| DSC Class | Class D (Digital Selective Calling) |
| Features | Dual/Tri-Watch, Scan, Intercom, Fog Horn, Loud Hailer |
| Display | LCD with backlight, adjustable brightness |
| Antenna Impedance | 50 Ω |
| Operating Temperature | -20°C to +60°C |
| Accessories Included | Hand microphone, mounting bracket, DC power cable |
| Maintenance | Clean exterior with a soft, damp cloth; avoid solvents |
| Safety Warnings | Do not operate without antenna; avoid exposure to salt spray |
| Spare Parts / Repairability | Contact ICOM service center for parts; rated 7/10 for repairability |
Frequently Asked Questions - ICM502D ICOM
How do I change the channel on the ICOM ICM502D?
Rotate the channel selector knob on the front panel clockwise to increase channels, counterclockwise to decrease. The selected channel appears on the LCD.
Can I monitor two channels at once?
Yes, activate Dual Watch to monitor channel 16 while on another channel, or Tri-Watch to monitor channel 16 and channel 9 simultaneously.
How do I enable DSC (Digital Selective Calling)?
Press the DISTRESS key for 5 seconds to send a DSC distress call. For routine DSC calls, program the MMSI number first via the setup menu.
What type of antenna should I use?
Use a 50 Ω marine VHF antenna rated for at least 25W. Ensure the antenna is properly connected before transmitting.
How do I perform a factory reset?
Turn off the radio, then press and hold the ENT and SCAN keys simultaneously while turning the power on. The radio will beep and reset to defaults.
Is the ICOM ICM502D waterproof?
Yes, it has an IPX7 waterproof rating, meaning it can be submerged in 1 meter of water for up to 30 minutes.
How do I adjust the squelch?
Press the SQL button and then rotate the channel knob to set the squelch level from 0 (open) to 10 (tight). Press the SQL button again to confirm.
Can I connect an external speaker?
Yes, use the external speaker jack on the rear panel. Connect a 4–8 Ω speaker rated for at least 3W.
How do I use the loud hailer function?
Press the HAIL button to activate the built-in loud hailer. Speak into the microphone to broadcast. Adjust volume with the knob.
What should I do if the radio overheats?
If the overheat protection activates, the radio will automatically reduce power. Turn off the radio and allow it to cool in a ventilated area before resuming use.
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