Anytone At-5555n Ii Service Menu
A common issue following Service Menu access is the loss of user-programmed memory channels. The Service Menu access often triggers a soft-reset of the microcontroller.
Restoration Protocol: If the radio behaves erratically after exiting the menu:
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.
The Service Menu of the AnyTone AT-5555N II is a powerful diagnostic tool that grants access to the fundamental operational constants of the transceiver. While essential for repair and optimization, it requires a disciplined approach and appropriate test equipment to utilize effectively. Technicians are advised to record the default values of all parameters before making adjustments to ensure the device can be restored to its prior state should an error occur. This paper provides the necessary theoretical framework for safe navigation of this hidden interface.
References AnyTone AT-5555N II Technical Service Manual (Internal Documentation). ARRL Handbook for Radio Communications, Alignment Procedures Chapter.
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. anytone at-5555n ii service menu
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. A common issue following Service Menu access is
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?
Do not trust online "mod" videos blindly.
Many YouTube influencers will tell you to max out every value (PWR HI = 255, MOD AM = 255). This is reckless. The digital settings correspond to analog voltages. Setting "255" on a parameter that expects a sine wave output will result in a square wave—burning your finals instantly.
Furthermore, the Service Menu does not lock out illegal frequencies. While the AT-5555N II is primarily a 10m/12m radio, misuse in CB bands (27 MHz) with excessive power is illegal and disrespectful to other band users.
Title: Operational Analysis and Technical Procedures: Accessing and Interpreting the Service Menu of the AnyTone AT-5555N II
Abstract
This paper provides a comprehensive technical guide to accessing, navigating, and interpreting the service (alignment) menu of the AnyTone AT-5555N II multi-band mobile transceiver. Often referred to as the "hidden menu," this interface is critical for technicians performing maintenance, frequency alignment, and power calibration. This document outlines the entry protocols, delineates the function of key menu parameters, and discusses the implications of misconfiguration. The paper aims to serve as a standardized reference for radio service professionals and advanced amateur radio operators seeking to restore the device to factory operational specifications.
Once in the service menu, navigation is generally straightforward: RF Calibration / TX Power