Subject: Service Menu Alignment and Hidden Features for the AT-5555N II Series
The AnyTone AT-5555N II (and its various brand variants like the CRT Megapro) is a popular choice for 10-meter radio enthusiasts. While the standard user menu allows for basic adjustments, the Service Menu (Alignment Mode) provides access to critical calibration settings for RF power, squelch, and frequency offset.
Due to recent firmware updates, the method to access this menu has evolved. This guide outlines the current procedures and the settings available.
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.
Unlocking the Full Potential of the Anytone AT-5555N II: A Guide to the Updated Service Menu
The Anytone AT-5555N II is a popular and versatile two-way radio that has been a favorite among amateur radio enthusiasts, emergency responders, and business users alike. With its robust feature set and reliable performance, it's no wonder that this radio has become a staple in many communication systems. Recently, an updated service menu has been made available, offering even more advanced features and customization options for users.
In this post, we'll take a closer look at the Anytone AT-5555N II and explore the new features and benefits of the updated service menu.
What is the Anytone AT-5555N II?
The Anytone AT-5555N II is a compact and rugged two-way radio that operates on both VHF and UHF frequencies. With a frequency range of 136-174 MHz and 400-470 MHz, this radio offers wide coverage and reliable communication. It features a 5-watt transmitter, 2000mAh battery, and a large LCD display, making it an ideal choice for both mobile and portable use.
What is the Service Menu?
The service menu is a hidden menu system that allows users to access advanced features and settings on their Anytone AT-5555N II radio. This menu is typically used by service technicians and advanced users to customize and troubleshoot the radio. The updated service menu offers a range of new features and options, including:
How to Access the Updated Service Menu
To access the updated service menu on your Anytone AT-5555N II, follow these steps:
Benefits of the Updated Service Menu
The updated service menu offers a range of benefits for Anytone AT-5555N II users, including:
Conclusion
The Anytone AT-5555N II is a powerful and versatile two-way radio that offers reliable communication and advanced features. With the updated service menu, users can unlock even more customization options, improve performance, and enhance security. Whether you're an amateur radio enthusiast, emergency responder, or business user, the Anytone AT-5555N II with the updated service menu is an excellent choice for your communication needs.
Disclaimer
The information provided in this post is for educational purposes only. Users should exercise caution when accessing the service menu, as incorrect settings can potentially damage their radio. It's recommended that users consult the user manual or contact a qualified service technician if they're unsure about any aspect of the service menu.
To access the updated service menu on the AnyTone AT-5555N II, you can use a specific power-on key sequence. This hidden menu allows for calibration of power levels, modulation, and RF gain, though it should be used with extreme caution as there is no factory reset specifically for these internal service parameters. Accessing the Service Menu
Preparation: Connect the radio to a dummy load or a tuned antenna to prevent damage during testing. anytone at5555n ii service menu updated
Power On: While the radio is off, press and hold the [MENU] and [MODE] buttons.
Key Sequence: Turn the power on while holding those buttons. Within two seconds (while the LCD segments are displayed), release them and quickly press the following six buttons in order: [DW], [RB], [NB], [SCAN], [MEM], and [EMG].
Verification: If successful, the screen will display a mode like "FM" or a numbered menu item (e.g., #01), indicating you are in the factory service mode. Navigating and Adjusting Settings
Scrolling: Use the Channel Selector knob to cycle through the approximately 59 available menu items.
Viewing Values: To see the current value of a menu item, press and hold the PTT (Push-To-Talk) button on the microphone.
Changing Values: While holding the PTT, rotate the Channel Selector knob to increase or decrease the value.
Saving: Turn the radio off to save and exit the service menu. Common Service Menu Items
While exact item numbers can vary slightly between firmware updates, users frequently target these specific calibrations:
RF Gain Calibration (#52): Used to fix "noisy" receive issues where the S-meter shows signal (e.g., S7) with no actual input. Increasing this value (e.g., from 86 to 105) can help normalize the receiver.
AM Power (#16 & #17): Item #16 typically controls AM High Power (dead key) and #17 controls AM Low Power.
Modulation (#19 & #20): These settings often control the modulation swing for different modes.
Warning: Always write down your original factory values before making any changes. If you lose your original settings, there is no way to automatically restore the radio to its factory-calibrated state.
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. Subject: Service Menu Alignment and Hidden Features for
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
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.
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.
The Anytone AT-5555N II service menu is a powerful tool for frequency expansion and alignment. However, the "Updated" versions of this radio have introduced variability in how these menus are accessed. Users should verify their PCB revision before attempting modifications. For precise alignment, always utilize external test equipment (Wattmeter, Frequency Counter, and Deviation Meter) rather than relying on the radio's internal uncalculated display.
End of Technical Paper
Accessing the service menu on the AnyTone AT-5555N II allows you to adjust internal alignment settings like modulation, RF gain, and frequency fine-tuning.
⚠️ WARNING: Record all current values before changing anything. There is no "factory reset" for these specific service parameters. 🛠️ Access the Service Menu Power Off the radio.
Press and hold the [MENU] and [MODE] buttons simultaneously. Power On the radio while holding these buttons.
Within 2 seconds, release them and quickly press the top row of 6 buttons in order from left to right: [DW], [RB], [NB], [SCAN], [MEM], and [EMG].
The radio will enter Service Mode, typically starting at menu item 01. ⚙️ Key Settings & Controls
Navigation: Use the Channel Selector knob to scroll through the 50+ menu items.
View Data: Momentarily key the PTT (microphone) to see the current value of a setting.
Change Data: While holding the PTT, rotate the Channel Selector knob to adjust the value.
Save/Exit: Power the radio off and back on to save your changes. Common Menu Items
CH-52 (RFG): Adjusts the RF Gain floor. Useful if you have high background noise (S5-S7) with no signal; increasing this value (e.g., from 86 to 105) can quiet the receiver.
Modulation: Lower values on AM modulation settings typically result in higher modulation (less clamping).
Alignment: Settings like bfC and fr0–fr9 control the BFO and fine-tuning voltages for different modes. 🔓 Frequency Expansion (11m Mode) For legitimate engineering or repair purposes, search for:
If you need to switch between the 10m amateur band and the expanded 11m band: Power Off the radio. Hold [FUNC] and [EMG] while powering on.
Turn the channel knob to select BAND 2 (expanded) or BAND 1 (10m).
Press [FUNC] to confirm; the screen will show rES then rEND.
For advanced PC-based adjustments, ensure you have the correct programming cable and software specifically for the "N II" version.
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.
: 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
I understand you're looking for information on the AnyTone AT-5555N II service menu, specifically an updated or corrected version.
However, I need to provide a critical warning before proceeding:
Depending on your specific firmware revision, utilize one of the following methods.