Anytone At5555n Ii Service Menu Updated ⭐ Instant

The following parameters are typically accessible in the updated service menu. Note that not all versions display every option.

Since you requested a "full paper" style breakdown regarding the updated service menu for the Anytone AT-5555N II (and its variants like the CRT SS 7900 or Maverick MC-7900), I have compiled a comprehensive technical guide below.

This document details the updated service menu access, parameter definitions, and the critical engineering differences between the "Old" and "New" PCB versions that often necessitate these menu changes.

Subject: Service Menu Access, Firmware Variants, and Hardware Alignment Platform: Anytone AT-5555N II / CRT SS 7900 / Intek H-520

I've updated the service menu reference for the Anytone AT-5555N II radio to make routine adjustments and troubleshooting easier. Use this as a quick guide — be careful: changing service-menu items can affect radio performance. Only proceed if you know what each setting does.

For legitimate engineering or repair purposes, search for:

Do not trust random YouTube videos or forum posts claiming to have "the full updated list" unless they show before/after spectrum analyzer measurements.

In the world of amateur radio, the Anytone AT-5555N II is a powerhouse, but for those who want to truly master their gear, the standard settings are just the beginning. This story follows a hobbyist's journey into the updated "Hidden" Service Menu—a place where the radio’s deepest secrets are kept. The Legend of the Hidden Menu

For years, the AT-5555 series was known for its reliability on 10 and 11 meters, but the "N II" version brought a more complex digital architecture. One rainy evening, a radio operator named Elias decided to address a nagging issue: his SSB receive quality was slightly "wonky," and his fine-tuning felt stepped rather than smooth. He knew a simple factory reset (holding FUNC + SCAN

while powering on) wouldn't fix the underlying alignment. He needed the Service Menu The Ritual of Access

To enter this restricted space, Elias performed the precise sequence required for the newer firmware: He turned the radio off. He held down the button while powering it back on. Once the screen lit up, he quickly pressed

The display transformed. Instead of channel numbers, cryptic codes like appeared. He was "inside." Tweaking the Soul of the Radio

Elias spent the next hour carefully navigating these updated parameters: : He used this to adjust the frequency of the 10.24MHz BFO

. A slight tweak here brought the SSB clarity back to life, removing the "tinny" sound from distant voices. fr0 to fr9

: These were the limit voltages for fine-tuning. By adjusting these, he ensured that his tuning remained even and smooth across the entire frequency range. anytone at5555n ii service menu updated

: This controlled the local oscillator offset. Elias learned to adjust this first to get close to the target frequency before fine-tuning with the Modulation (IC9) : He navigated to the

setting to boost his audio modulation. Finding it at the default of 31, he increased it toward 63, ensuring his voice would punch through the noise on skip. The Aftermath

With the adjustments made, he saved his settings and exited the menu. The radio felt reborn—his transmit was stronger, his receive was crystal clear on LSB and USB, and his frequency was dead-on.

However, Elias left with a word of caution for others: these settings are unique to every individual radio's hardware. Changing them without a frequency counter or signal generator is like "tuning a piano in the dark"—once you lose the factory alignment, it’s hard to find your way back. exact technical steps

to perform a specific adjustment, such as opening the bands or boosting your modulation? Anytone 5555n Ii Service Menu - Google Groups

The AnyTone AT-5555N II is a high-performance 10-meter radio, but many of its most critical calibration settings—like power output and modulation—are tucked away in a hidden Service Menu. Because there is no factory "reset" for this specific menu, users must exercise extreme caution when making adjustments. How to Access the Hidden Service Menu

Accessing the service mode requires a specific sequence of button presses during the power-on cycle.

Preparation: Ensure the radio is connected to a dummy load or an antenna to prevent damage.

Initial Combo: With the radio OFF, press and hold both the [MENU] and [MODE] buttons. Power On: While holding those buttons, turn the radio on.

Secondary Sequence: Once the radio powers up, release the initial buttons and immediately press the following top-row buttons in order: [DW], [RB], [NB], [SCAN], [MEM], and [EMG].

Entry Confirmation: If successful, the display should show "FM" (representing the factory menu) or a numerical setting. Navigating and Saving Settings

Scrolling: Use the Channel Selector knob to cycle through different menu items (ranging from 1 to over 50).

Viewing Values: To see the current value of a setting, press the PTT (Push-To-Talk) button on the microphone.

Changing Values: To modify a value, hold the PTT while rotating the Channel Selector. Saving: Turn the radio off to save your changes.

CRITICAL WARNING: Always WRITE DOWN every original value before changing it. There is no software reset for these specific alignment values; if you change them without a backup, you cannot easily restore factory calibration. Key Service Menu Items and Fixes The following parameters are typically accessible in the

While the radio lacks official documentation for every item, community testing has identified several critical settings for the AT-5555N II: Description #16 AM High Power Adjusts the peak dead key for AM high power mode. #17 AM Low Power

Adjusts the low power dead key (often set to 2 watts for amp driving). #19 & #20 Modulation Some users set these to "0" to improve AM modulation swing. #52 (RFG) RF Gain Fix

Used to resolve "S5-S7 noise" issues. Increasing this value (e.g., from 86 to 105) can quiet a noisy receiver. Frequency Expansion (Export Mode)

If you are looking to unlock the full 11-meter and 12-meter bands (25.615 to 30.105 MHz), follow this separate procedure: Turn the radio OFF. Hold [FUNC] and [EMG] and turn the radio ON. Rotate the channel knob to select "BAND 2". Long-press [FUNC] until the display shows "rEND". Power cycle the radio.

The service menu on the AnyTone AT-5555N II contains critical alignment parameters that are not documented in the standard Instruction Manual. Crucially, there is no "factory reset" for this menu, so you must record your original values before making any changes. Accessing the Service Menu

To enter the hidden service menu, follow these steps precisely: Preparation: Ensure the radio is powered off.

Power On sequence: Press and hold the [MENU] and [MODE] buttons simultaneously while turning the radio on.

Code Entry: All LCD segments will illuminate for approximately 2 seconds. Within this window, release the buttons and immediately press the top-row keys in this specific order: [RB], [NB], [SCAN], [MEM], then [EMG].

Confirmation: The radio will enter the Service Mode, often defaulting to a specific channel setting (e.g., CH-01). Operating the Service Menu

Navigation: Rotate the [Channel] knob to scroll through the different menu items (there are approximately 59 settings).

Viewing Data: Key the microphone (PTT) to view the current value of a selected menu item.

Adjusting Values: While holding the PTT, rotate the [Channel] knob to increase or decrease the value.

Saving and Exiting: Power the radio off and then back on to store the new values. Common Service Menu Parameters

While most of the 59 items are used for factory alignment, users frequently access specific settings for performance tweaks:

CH-52 (RFG): Adjusts the RF Gain threshold. Increasing this value (e.g., from a default of 86 to around 105) can help reduce background static and "S7 noise" on newer units. Do not trust random YouTube videos or forum

Frequency Alignment: Includes settings such as bfC (BFO frequency adjustment) and loC (Local Oscillator offset) for fine-tuning SSB operation.

Modulation: Includes parameters for AM modulation and AMC clamping levels; lower values typically equate to higher modulation. Summary of Hidden Menus Access Method Common Purpose Standard Menu Long press [MENU] User settings (BEEP, ECHO, TOT, etc.) Expansion Menu Hold [FUNC] + [SCAN] at power-on Resetting frequency ranges (e.g., 25.615–30.105 MHz) Service Menu [MENU]+[MODE] at power-on, then [RB, NB, SCAN, MEM, EMG] Technical alignment (RF Gain, BFO, Modulation)

Are you looking to fix a specific performance issue, such as high background noise or frequency drift? Anytone at-5555n II (version 2) - WorldwideDX Radio Forum

To access the updated service menu on the AnyTone AT-5555N II, you must use a specific sequence of key presses while powering on the unit

. This hidden menu allows for hardware-level alignment and frequency calibration that is not available in the standard user background menu. Accessing the Service Menu Before attempting these steps, write down your current settings

. These values are factory-set for your specific radio, and there is no "default" reset that restores them once changed. Turn the radio OFF. Hold the [FUNC] button and turn the power

While the radio is on, quickly press the following buttons in sequence:

The display should enter the service mode, showing alignment parameters. Google Groups Service Menu Parameters Once in the service menu, use the

button to scroll through the different settings. The specific alignment options vary depending on the current Mode Switch position (AM, FM, USB, LSB). Technical Description BFO Frequency Adjusts the 10.24MHz Beat Frequency Oscillator. Fine Tuning

Controls limit voltages for varicaps, affecting oscillator frequency steps (e.g., .00, .04, .05, .09). Local Oscillator

Sets the local oscillator offset to align TX/RX frequencies. Common Adjustments & Alignment Tips BFO Alignment: Standard values for alignment include 10.6950MHz for CW/FM, 10.6925MHz for USB, and 10.6975MHz Correction Sequence: If your radio is off-frequency in SSB modes, adjust first to get as close as possible, then use

for final fine-tuning. This helps keep the fine-tuning (fr) range smooth. Hard Reset:

To clear user settings and return to a default frequency range (typically 25.615 to 28.305MHz), hold while powering on. Google Groups User Background Menu (Standard)

For non-alignment settings like Mic Gain, SWR Protection, or Noise Reduction (NRC), use the standard background menu instead: Long-press for 2 seconds. Channel Switch to select a menu item. to enter the setting, adjust it, and press again to save. device.report