Whether you are correcting a factory frequency error, fine-tuning your modulation for a competition audio setup, or matching your deadkey to a high-drive amplifier, the service menu is your surgical instrument.
This article will explain exactly what the Service Menu is, how to access it safely, what each critical function does, and how to perform the work required to bring your radio back to peak performance. Before touching the buttons, you must understand why the service menu exists. The AT-5555N II is calibrated at the factory using automated equipment. However, shipping vibrations, temperature changes, or component aging can shift these values. anytone at5555n ii service menu work
Disclaimer: Accessing the service menu may void your warranty if modified outside of legal CB frequency limits (depending on your country). Always comply with local transmission laws. The author assumes no responsibility for incorrectly configured parameters leading to radio damage. Whether you are correcting a factory frequency error,
Turn the "Freq/CH" knob. If the top line displays codes like P-01 , P-02 , up to P-65 (depending on firmware version), you are inside the Service Menu. Part 3: The Essential Service Menu Parameters (The "Work" You Came For) Once inside, you will see parameters labeled P-XX . Here is a breakdown of the most critical ones you will likely need to modify. Note: Firmware versions vary slightly, but these are standard on the V4/V5 hardware. The AT-5555N II is calibrated at the factory
Test the radio with a wattmeter, frequency counter, or on-air friend before closing the chassis. Part 7: Troubleshooting Common Service Menu "Work" Failures Even when following guides, users make mistakes. Here is your fix-it flowchart.