Anytone At-5555n | Ii Service Menu

Note: Depending on your firmware revision (such as the newer AT-5555N II v3), some markets require pressing the and MODE keys simultaneously during boot, followed by a rapid combination sequence to unlock hidden service values. Service Menu Parameter Guide

You must write down every original value before changing it.

: A common use for this menu is to address high "noise floor" readings (where the S-meter shows S5–S7 with no signal). Changing CH-52 (RFG) from its default (often ~86) to a higher value like has been reported to resolve this. Adjustment Method : To change a value, press and hold the PTT button while rotating the Factory Reset anytone at-5555n ii service menu

Testing and rollback

These parameters dictate how loud and clean your transmitted audio will be. Note: Depending on your firmware revision (such as

Alternatively, try pressing , then RB , then NB , then DW sequentially. Understanding the Service Menu Items (Alignment Menu)

By understanding the service menu and its options, you can optimize your Anytone AT-5555N II for better performance and functionality. However, always exercise caution and seek guidance when making changes to the radio's configuration. Changing CH-52 (RFG) from its default (often ~86)

Technician Tip: While it is tempting to max these values out, pushing the final transistors past their rated limits will cause thermal runaway, heavy harmonic splatter, and premature hardware failure. Keep adjustments within a conservative margin. 3. Modulation and Deviation (MOD / DEV)

Use the Channel Selector or VFO knob to cycle through the menu items (there are typically around 53 parameters).

While holding both controls down, turn on the radio using the volume/power knob.

Immediately press the following buttons in sequence: , then [NB] , then [DW] . Service Menu Navigation