Anytone At5555n Ii Service Menu Work __exclusive__ Access

Use a high-quality dummy load and an accurate watt/SWR meter, or a radio service monitor, to ensure proper alignment.

| Parameter | Function | Typical Range | When to Adjust | | :--- | :--- | :--- | :--- | | | Reference Frequency (PLL Master Clock) | 0 to 255 | Most common fix. Adjusts the master oscillator. | | PA-H | High Power AM/FM Bias | 0-255 | Sets final transistor bias for high power. | | PA-L | Low Power AM/FM Bias | 0-255 | Sets final transistor bias for low power. | | Pc-H | SSB High Power ALC Threshold | 0-255 | Limits peak envelope power on SSB. | | Pc-L | SSB Low Power ALC Threshold | 0-255 | Limits low power SSB. | | Mod | AM Modulation Depth Limit | 0-255 | Maximum AM percentage (Factory ~95%). | | S-1 through S-9 | S-Meter Calibration | Varies | Adjusts receive signal strength reading. |

This sequence should unlock the service menu, allowing access to calibration parameters. Understanding the Service Menu Functions The service menu on the AT-5555N II anytone at5555n ii service menu work

Before we dive into the button combinations, let’s understand why you might need to perform service work on the AT-5555N II.

while turning the power on. This defaults the frequency range to 25.615–28.305MHz. Warning: Use with Caution Use a high-quality dummy load and an accurate

Quickly press the following buttons in order: → NB → DW . Service Menu Options & Functions

Making changes to the service menu is a serious step. The radio does not reset these parameters to factory defaults through its standard user menu reset, meaning any changes you make are permanent unless you can find and manually revert them. | | PA-H | High Power AM/FM Bias

Turn the radio completely off using the volume/power knob.

The heart of the service menu is a list of 59 parameters (CH 1 through CH 59). While the specific names and functions of all 59 are not publicly documented, here are the key ones that the community has identified for the AT-5555N II: