Anytone At-5555n Ii Service Menu

After adding a preamp or external attenuator, you can realign S-9 to restore meter accuracy, helping you judge signal reports realistically.

Before attempting to access the Service Menu, the operator must acknowledge the risks involved:

Recommended Equipment:

The service menu (sometimes called a hidden or engineering menu) provides low-level configuration and calibration options beyond the standard user programming screens. It’s used for manufacturing calibration, repairs, hardware diagnostics, and advanced feature enabling/disabling. Accessing it can change radio behavior in ways that affect safety, compliance, or legal operation.

The entry sequence for the Service Menu on the AT-5555N II is distinct from standard CB radios and requires a specific "three-button" handshake.

Step-by-Step Protocol:

Note: On some firmware revisions, the button combination may be FUNC + SCAN. If the above procedure fails, utilize the secondary combination.

Proceed at your own risk. Entering the service menu and changing values incorrectly can:

Recommendation: Write down the original value of every setting you change. Do not adjust anything unless you own a calibrated frequency counter, a watt meter with a dummy load, and an oscilloscope (for modulation).

Once the Service Menu is active, the standard operational buttons are remapped to navigation functions:

The Service Menu contains parameters essential for the functionality of the Phase Locked Loop (PLL) and the RF Power Amplifier. The exact numbering may vary by firmware version, but the functions remain consistent.

A. Adjusting RF Power (PO)

B. Frequency Expansion (Unlocking) If the radio is restricted to the standard 11m band (CB):

C. Frequency Calibration (TCXO) If your radio is slightly off-frequency (people tell you you sound "bassy" or "muffled" on SSB): anytone at-5555n ii service menu

The Anytone AT-5555N II service menu allows for deep internal alignment and calibration. Because there is no factory reset for these settings, it is vital to record every original value before making changes. 🛠️ Accessing the Service Menu To enter the service menu, follow these steps exactly: Ensure the radio is OFF.

Press and hold the MENU and MODE buttons simultaneously while turning the power ON.

All LCD segments will illuminate for approximately 2 seconds.

Within those 2 seconds, release the buttons and immediately press the following buttons in sequence: RB, NB, SCAN, MEM, EMG.

Alternative method: Some versions require holding FUNC while powering on, then pressing the other buttons in the top row (DW to EMG) in order. ⚙️ Navigation and Controls

Scrolling: Use the Channel Selector or VFO knob to cycle through the menu items (there are typically around 53 parameters).

Viewing Values: To see the current numerical value of a setting, press the PTT (key the mic).

Changing Values: Hold the PTT and rotate the Channel Selector or VFO knob to adjust the value up or down.

Saving/Exiting: Power cycle the radio (turn it off and back on) to save settings. 📝 Common Service Menu Parameters

While documentation is limited, users have identified several key settings: CH-52 RFG

Often used to reduce high background noise (S5-S7) present on some units. bfC, fr0-fr9 Frequency Alignment

Used to calibrate the carrier frequency for different modes (USB, LSB, CW). AM Modulation AMC / Modulation

Adjusts the clamping level; smaller values typically equal higher modulation. ⚠️ Critical Warnings After adding a preamp or external attenuator, you

No Factory Reset: Performing a standard CPU reset (FUNC + SCAN at power on) will not restore service menu values to factory defaults.

Record Everything: Always write down every value for all 50+ menu items before changing anything. If you lose your original settings without a backup, the radio may require professional realignment with a signal generator.

Equipment Required: Many frequency-related settings (like fr0) should only be adjusted while using a high-precision frequency counter or signal generator. Anytone 5555n Ii Service Menu - Google Groups

Accessing and Navigating the Service Menu of the AnyTone AT-5555N II: A Comprehensive Guide

The AnyTone AT-5555N II is a versatile and feature-rich two-way radio that offers a wide range of functionalities for both amateur and professional users. One of its advanced features is the service menu, which allows users to access and modify various settings and parameters that are not available through the standard user interface. This essay aims to provide a detailed overview of how to access and navigate the service menu of the AnyTone AT-5555N II, as well as to discuss the implications and potential uses of this feature.

Accessing the Service Menu

To access the service menu on the AnyTone AT-5555N II, users must follow a specific sequence of steps. First, ensure that the radio is powered off. Then, press and hold the "Monitor" button while turning the radio on. Continue holding the "Monitor" button until the radio enters the service menu mode. This may take a few seconds. Once in the service menu, users can navigate through the various options using the radio's control buttons.

Navigating the Service Menu

The service menu of the AnyTone AT-5555N II is divided into several sub-menus, each containing a range of adjustable parameters. These parameters can include settings for transmitter power, frequency deviation, squelch sensitivity, and more. It is crucial for users to exercise caution when making changes in the service menu, as incorrect settings can potentially render the radio inoperable or cause it to malfunction.

Implications and Potential Uses

The service menu of the AnyTone AT-5555N II offers advanced users and technicians the ability to customize and fine-tune the performance of their radio. For instance, adjusting the transmitter power can be useful in optimizing the radio's range and signal quality in different operational environments. Similarly, tweaking the squelch settings can help in reducing background noise and interference, thereby improving the overall communication clarity.

However, accessing and modifying settings in the service menu also carries risks. Unauthorized or improper changes can lead to compliance issues with regulatory standards, void warranties, or even damage the radio. Therefore, it is recommended that only experienced users or certified technicians attempt to access and modify the service menu settings.

Conclusion

The service menu of the AnyTone AT-5555N II is a powerful tool that offers advanced customization options for users who wish to optimize the performance of their radio. While it presents opportunities for enhancing the device's functionality and efficiency, it also requires a careful and informed approach to avoid potential pitfalls. By understanding how to safely access and navigate the service menu, users can unlock the full potential of their AnyTone AT-5555N II, ensuring reliable and high-quality communication.

To access the factory service (hidden) menu on the Anytone AT-5555N II, you must perform a specific button sequence during startup. This menu is used for internal hardware calibrations and should be used with extreme caution. Access Procedure Preparation: Ensure the radio is powered OFF.

Initial Hold: Press and hold the Menu and Mode buttons simultaneously.

Power On: While holding those buttons, turn the radio ON. All LCD segments will light up for approximately 2 seconds.

Sequential Entry: As soon as the display turns orange (within that 2-second window), release the Menu and Mode buttons and quickly press the following buttons in exact order: DW → RB → NB → SCAN → MEM → EMG

Confirmation: If successful, the screen will display "FM" (for Factory Menu) instead of an "ERROR" message. Navigating & Saving Settings

Scroll: Rotate the Channel Selector knob to move through the service menu items.

Adjust: To change a value, press and hold the PTT (key the mic) while rotating the Channel Selector knob.

Save: Release the PTT to save the new value for that specific menu item. Exit: Turn the radio OFF to exit the service mode. Key Service Menu Items Setting Name CH-17 AMPOWL

Sets the low power dead key (typically adjusted to 1-2 watts). CH-52 RFG RF Gain calibration; default value is usually around 86. bfC BFO Adjustment Adjusts the 10.24MHz BFO frequency. loC LO Offset

Controls the local oscillator offset for frequency centering.

Important Warning: Never change these settings without professional test equipment (frequency counters, signal generators). Improper adjustments can "unalign" the radio's transmission and reception across different modes. Always write down original factory values before making any changes.

What are the hidden menu settings on the AnyTone AT5555N 2 radio? Recommended Equipment: The service menu (sometimes called a

Here’s a detailed feature-style article on the AnyTone AT-5555N II Service Menu, written for radio enthusiasts, techs, and CB/Ham operators who want to unlock the full potential of their rig.