Anytone At-5555n Ii Service Menu -

: Pushing final transistors past their rated limits will burn out the radio. How to Access the AnyTone AT-5555N II Service Menu

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

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

Before entering the service menu, you must understand that these settings directly control the radio's internal alignment. anytone at-5555n ii service menu

: Ensure you are holding the correct buttons completely down before turning the power knob. Some export versions require a hardware pad to be bridged inside the radio before the software menu unlocks.

Ensure the radio volume/power knob is turned completely off. Press and Hold: Press and hold the FUNC (or MENU ) button.

Press the PUSH/SEL knob or use the designated adjustment keys to highlight the numerical value, then rotate the knob to increase or decrease the setting. : Pushing final transistors past their rated limits

The LCD screen will transition from its standard display to show specialized alignment parameters like bfC or fr0 .

While the standard user menu allows you to change basic operational settings like key beeps, display colors, and scan modes, the (or alignment menu) is a hidden layer of software control. This menu allows technicians to calibrate the radio’s internal hardware parameters without opening the case.

Adjusts the reference frequency of the 10.24 MHz Beat Frequency Oscillator (BFO). Center Frequency Navigating & Saving Settings Before entering the service

Technicians use an RF signal generator to inject a precise microvolt (

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

: Press the [FUNC] button to cycle through the different alignment parameters.

Disclaimer: Accessing and modifying settings in the service menu can permanently alter your radio's performance. Incorrect adjustments can damage the transmitter, distort your audio, or cause the radio to transmit outside of legal specifications. Proceed at your own risk. It is highly recommended to record all original factory values before making any changes. What is the Service Menu?