Anytone At-5555n Ii Service Menu |link| Guide

To access the service menu on the Anytone AT-5555N II , use the following key sequence: the radio. Hold down the buttons simultaneously and turn the radio two seconds

of powering on, release those buttons and quickly press the following sequence in order: (Roger Beep) (Noise Blanker) (Emergency) Important Considerations Calibration Settings

: The service menu contains alignment settings specific to your individual unit. Write down all original values

before making any changes. Improper adjustments can cause permanent frequency drift or hardware issues. RF Gain Fix

: 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

: If the radio becomes unstable, you can perform a full reset by holding while powering on. Google Groups frequency alignment procedures for CW, USB, and LSB modes using this menu?

The AnyTone AT-5555N II Go to product viewer dialog for this item.

is a sophisticated, software-controlled 10-meter radio that relies on a "hidden" Service Menu for fine-tuning its internal parameters. Unlike older radios with physical potentiometers (pots), most adjustments for power output, modulation, and frequency alignment are handled through these digital menus. Accessing the AT-5555N II Service Menu

To enter the service menu, follow this specific power-on sequence:

Preparation: Ensure the radio is connected to a dummy load or a well-tuned antenna before making any changes.

Initial Key Combo: With the radio off, press and hold both the MENU and MODE buttons simultaneously while turning the power on.

Validation: All LCD segments will light up for roughly two seconds. During this brief window, release the MENU and MODE buttons.

Security Sequence: Quickly press the following buttons in exact order: RB, NB, SCAN, MEM, and EMG. anytone at-5555n ii service menu

Note: Some versions may require a simpler sequence: hold MENU and MODE, power on, then press each button moving down the line starting with DW.

Confirmation: The screen should display "FM" (Factory Menu), indicating you have successfully entered the service mode. Essential Service Menu Settings

Once inside, you can navigate settings using the Channel Selector knob. To view or change a value, press and hold the PTT (microphone key) while rotating the Channel Selector. Function & Recommended Usage Ch 16 AMHI

AM High Power: Adjusts the maximum "dead key" power for AM mode. Ch 17 AMPOWL

AM Low Power: Typically used to set the low power dead key to 1–2 watts for use with amplifiers. Ch 19 & 20 MOD

AM Modulation: Controls the modulation swing. Lowering these values often increases modulation. Ch 52 RFG

RF Gain: Calibrates the receiver's gain floor. The factory default is typically around 86. bfC BFO

Beat Frequency Oscillator: Adjusts the frequency for CW, USB, and LSB modes. loC LO

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

Write Everything Down: Before changing any value, record the original factory setting for all 53+ items. There is no master reset that restores these individual calibration values once changed.

Dummy Load Required: Transmitting into an open circuit while adjusting power settings can permanently damage the radio's finals.

Incremental Adjustments: For modulation and power, change values in small steps and verify with an external wattmeter or oscilloscope. To access the service menu on the Anytone

Old Man Miller’s workshop smelled of ozone and solder—a scent that usually meant something broken was about to be reborn. On his bench sat the AnyTone AT-5555N II

, a beast of a 10-meter radio that had gone strangely silent on the upper sideband

"It’s not a hardware fail," Miller muttered to his apprentice, Leo. "It’s the soul of the machine that's out of alignment."

Leo watched as Miller performed the "secret handshake" to reach the radio's hidden settings. With the power off, Miller held down the

buttons simultaneously while flicking the power switch. The display blinked, shedding its consumer-friendly face for the stark, raw data of the Service Menu

"This is the 'In-Between,' Leo," Miller whispered. "Most folks shouldn't be here. One wrong turn in these hex codes and you’ve got a very expensive paperweight."

He navigated to the bias settings, his fingers dancing over the channel knob to adjust the internal gain. He wasn't looking at the screen as much as he was watching the needle on his external power meter. With a final, delicate click of the dial, the needle jumped to life, dancing perfectly to the rhythm of his voice.

Miller turned the radio off and back on, returning it to the real world. He handed the mic to . "Go ahead. Tell the skip-land we’re back."

keyed up, the red TX light glowing like a coal. "CQ, CQ... this is the ghost in the machine, sounding clearer than ever." How to Access the "Secret" Menu

If you are looking to explore the actual service mode of the AnyTone AT-5555N II , here is the standard procedure: : Ensure the radio is completely turned off. The Key Combo : Press and hold the buttons at the same time. : While holding those buttons, turn the radio on. Navigation Channel Selector

knob to scroll through hidden alignment settings like Power (PWR), Squelch (SQ), and Modulation (MOD) levels.

Short how-to story: Accessing the Anytone AT-5555N II Service Menu

Tom needed to tweak his Anytone AT-5555N II handheld for better performance on a local repeater. He wasn’t a radio tech, but he wanted a safe, reversible change — nothing that would void warranty or break the radio. Short how-to story: Accessing the Anytone AT-5555N II

1. Preparation

   • Tom fully charged the radio and set aside a quiet, well-lit workspace.
   • He downloaded the official user manual and saved his current CPS (programming software) configuration file to his computer so he could restore settings if needed.
   • He wrote down his radio’s firmware and hardware version from the CPS screen.

2. Entering service menu (safe approach)

   • Tom powered off the radio.
   • He held both the PTT and MONI (monitor) buttons while powering the radio on to enter a maintenance/service-like mode (note: specific key combos vary by model and firmware; consult the manual first).
   • The radio showed a special menu with versions and adjustable parameters. Tom navigated slowly, only viewing items he could identify: calibration values, battery calibration, and display contrast.

3. What Tom checked (and what he avoided)

   • Checked firmware and hardware versions to confirm compatibility with the CPS and any available firmware updates.
   • Looked at battery calibration numbers and contrast — safe, reversible changes.
   • Avoided altering RF power stages, TX/RX calibration offsets, or RF alignment values without professional equipment and documentation.
   • Did not change anonymous ID or serial-related fields.

4. Making a safe change

   • Tom adjusted display contrast and the key beep volume for comfort.
   • He saved the configuration, then exported the new CPS file to his computer.

5. Testing and rollback

   • He tested transmit and receive on known simplex frequencies at low power.
   • Everything worked; if something had been wrong, Tom was ready to re-import his original CPS file and reboot the radio.

6. Final notes and best practices

   • Always back up existing settings before entering service menus.
   • Only change parameters you understand; the service menu can contain calibration and RF settings that require specialized tools.
   • Use manufacturer documentation and firmware from official sources.
   • If unsure, contact an authorized service center.

If you want, I can:

• Provide the exact button sequence for your firmware version (I’ll assume a common combo unless you give the firmware/hardware version), or
• Draft a step-by-step checklist you can print and follow.

How to Enter the AnyTone AT-5555N II Service Menu

Unlike older analog radios with physical potentiometers, the AT-5555N II uses a digital encoder and button combination.

Follow these steps precisely:

1. Power off the radio completely. (Remove DC power or use the front power button until the screen goes dark).
2. Press and hold the FUNC (Function) button.
3. While holding FUNC, press and hold the BAND button.
4. While holding both FUNC and BAND, power on the radio (press the PWR button).
5. Release all buttons.

If successful, the display will change. Instead of showing a channel or frequency, you will likely see something like "S-01" or "R-01" on the screen, or a parameter code like "POWER HI".

Note: On some firmware versions, the entry method may be slightly different (e.g., holding LCR/MODE instead of BAND). If the above fails, try FUNC + MODE + Power.

How to access (typical procedure)

Note: exact key sequence may vary by firmware version. If these don’t work, consult the official service manual or firmware release notes.

1. Power off the radio.
2. Press and hold the [PTT] and [MONI] (or the [FUNC] + [PTT] combination used on similar Anytone models).
3. While holding those buttons, power on the radio until the service menu screen appears.
4. Release buttons and navigate with the channel knob or arrow keys.
5. Use [OK]/[ENT] to enter submenus and [BACK]/[ESC] to exit.

(If the unit uses a different button combo, try [MENU] + [#] on power-up; stop if the screen freezes or the radio behaves oddly.)