Anytone At-5555n Ii Service Menu Here

: Controls the frequency offset. Adjust this first if the radio is off-frequency across all modes. Critical Safety Rules

While exact parameters can shift across manufacturing batches, the core alignment groups include: 1. Frequency Calibration (REF / FREQ)

To access the service menu on the AnyTone AT-5555N II , follow these steps: Turn the radio off. Press and hold the buttons simultaneously. Turn the radio on while holding these buttons. Within 2 seconds, release the Immediately press the following buttons in sequence: anytone at-5555n ii service menu

: Standard CPU resets (holding [FUNC] + [SCAN] during power-on) only reset user-level menu settings and frequency ranges, not service menu calibrations.

There are two distinct menu systems on the AT-5555N II: the standard menu for regular users, which contains basic operational parameters, and the hidden service menu for factory-level adjustments. Accessing the service menu requires a specific button sequence during the startup process. While exact sequences can vary between firmware versions, the most commonly reported method is as follows. : Controls the frequency offset

If successful, the screen will display (Factory Menu) or a numbered setting. Navigation and Controls

Before proceeding, connect your radio to a reliable 13.8V DC power supply and a dummy load. Tuning the radio while transmitting into an antenna can cause interference and inaccurate readings. Frequency Calibration (REF / FREQ) To access the

The Anytone AT-5555N II is a highly popular, feature-rich 10-meter radio frequently converted for 11-meter Citizens Band (CB) use. While the standard user menu allows you to change basic settings like beep volume and display colors, the hidden service menu (or alignment menu) unlocks the core hardware calibrations of the radio. Accessing this menu allows technicians and advanced operators to fine-tune the radio's power output, modulation, and frequency accuracy without opening the case.

A common complaint with some AT-5555N II units is an elevated noise floor (e.g., an S5-S7 reading with no antenna connected). A popular workaround is to adjust the service menu:

The method differs slightly depending on the specific firmware version of your radio, but the following method is standard for the N-II series:

: If successful, the radio will enter the Service Mode, often starting at a specific channel setting like CH-52 (RFG) Key Menu Settings & Operations