Icom IC-746PRO Service Manual (English)

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Questions and Answers:

Richard PalmerJul 26, 2025

Why does the displayed frequency not change properly on my Icom Transceiver?

C
Christine WilliamsJul 26, 2025
If the displayed frequency on your Icom Transceiver isn't changing as expected, there are a few potential causes. First, check if the dial lock function is activated. If it is, simply push the [LOCK/SPCH] button to turn it OFF. Another possibility is that you might be in a set mode screen. To exit this, push the [MENU] button several times. Finally, if neither of those solutions work, the internal CPU may have malfunctioned, requiring a reset.

Icom IC-746PRO Specifications

General

Frequency Range (TX)	1.8 - 54 MHz
Modes	SSB, CW, RTTY, AM, FM
IF Frequencies	1st: 64.455 MHz, 2nd: 455 kHz
Image Rejection	> 70 dB
IF Rejection	> 70 dB
Voltage	13.8 V DC
Current Consumption (max)	22 A
Type	HF Transceiver
Frequency Range (RX)	0.030 - 60 MHz
Power Output	100W
Receiver Type	Double conversion superheterodyne
Sensitivity (AM)	1.0 µV (50-54 MHz)
Sensitivity (FM)	< 0.5 µV
Selectivity (SSB)	2.4 kHz / 6 dB
Selectivity (CW)	500 Hz / 6 dB
Selectivity (AM)	6 kHz / 6 dB
Selectivity (FM)	15 kHz / 6 dB
Current Drain (TX)	22 A

Summary