Ii Service Menu Work - Anytone At5555n
If you own an Anytone AT-5555N II, you already know it is a powerhouse in the world of 10-meter and 12-meter amateur radio, as well as a favorite among freebanders. This radio is celebrated for its robust build, excellent receiver sensitivity, and the famous "N2" firmware improvements over its predecessor.
However, even the best factory-produced radios have tolerances. Over time, or immediately after purchase, you might notice that your transmitted frequency is off by 50 Hz, your AM carrier is too high, or your SSB output power seems low. This is where the hidden Service Menu becomes your best friend.
Warning: Entering the service menu and changing values without proper equipment (frequency counter, oscilloscope, RF power meter, and dummy load) can permanently detune your radio, making it unusable. Proceed with caution.
This article explains everything you need to know about the Anytone AT-5555N II service menu work, including how to access it, navigate the parameters, and perform common calibrations.
Once inside, the standard channel knob does not change frequency. Instead, it scrolls through the parameter codes. The button functions remap as follows:
Crucial Note: Write down EVERY original value before changing anything. Use a notebook. Do not rely on memory. anytone at5555n ii service menu work
One of the biggest lies in a radio is the S-Meter. Manufacturers often calibrate these to flatter the user (making signals look stronger than they are).
To access and navigate the AnyTone AT-5555N II service menu (hidden alignment menu), follow these steps as documented by users on forums like Google Groups and specialized CB blogs: Accessing the Service Menu
There are two common methods reported, depending on your firmware version or specific hardware revision: Method A (Direct Sequence): Turn the radio OFF. Hold down the FUNC button while turning the radio ON.
Once on, immediately press the following buttons in sequence: RB → NB → DW. Method B (Timed Sequence): Press and hold MENU and MODE while turning the radio ON. The LCD will light up all segments for roughly 2 seconds.
Within those 2 seconds, release both buttons and quickly press: RB → NB → SCAN → MEM → EMG. Key Settings & Navigation If you own an Anytone AT-5555N II ,
Once inside, you can navigate using the FUNC button or the channel knob to scroll through various alignment codes.
CH-52 (RFG): Controls the RF Gain floor. Default is often around 86; lowering this can help if your S-meter is showing a high noise floor (S5-S7) even without a signal. bfC: Adjusts the 10.24MHz BFO (Beat Frequency Oscillator).
fr0, fr4, fr5, fr9: Fine-tuning voltage limit settings for different frequency steps (.00, .04, .05, .09).
loC: Controls the Local Oscillator offset. If your USB/LSB frequencies are off, adjust this first before tweaking the BFO (bfC). Critical Warning
The service menu contains roughly 59 settings that directly control the radio's hardware calibration. Crucial Note: Write down EVERY original value before
Document everything: Write down your original values before changing anything.
No "Undo": There is no "reset" for individual service menu values; once changed, they are overwritten.
Risk: Changing these values without proper test equipment (spectrum analyzer, frequency counter) can result in the radio transmitting off-frequency or causing interference on adjacent channels.
Proactive Follow-up: Are you trying to fix a specific issue like off-frequency reception on SSB or a noisy S-meter? Knowing the goal can help narrow down which specific setting to adjust.
(Note: Exact button names may vary; consult AnyTone AT-5555N II hardware labeling. If these steps fail, the radio may require an alternate key combo or a firmware debug cable.)
