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AnyTone AT-5555N II is a popular high-performance 10-meter radio, known for its extensive customization options. While the standard menu allows for basic adjustments, the service menu (also known as the hidden or alignment menu) provides deep access to critical calibration settings like power levels and modulation. Critical Warning: Read Before Proceeding
The service menu is intended for advanced users and technicians. These settings are alignment parameters; performing a standard factory reset will not restore them to their original values.
Essential Step: You must write down every single value before making any changes.
Requirement: Connect the radio to a dummy load or an antenna with a perfect SWR before entering the menu to prevent damage during testing. How to Access the Service Menu Accessing the service menu on the AT-5555N II
involves a specific sequence of button presses during power-up. Preparation: Ensure the radio is turned OFF.
Initial Combo: Press and hold the MENU and MODE buttons simultaneously. Power On: While holding these buttons, turn the radio ON.
Sequence Activation: Immediately release the first two buttons and quickly press the remaining buttons on the top row in order, moving from DW toward EMG.
Confirmation: If successful, the screen will display "FM" (Factory Menu) or a setting number. Navigating and Modifying Settings
Once inside the menu, navigation is handled through the front panel controls and the microphone.
Scroll Menu Items: Use the Channel Selector knob to cycle through the available parameters (there are roughly 53 in total). View/Change Values:
To view or modify a setting, press and hold the PTT (Push-To-Talk) button on the microphone.
While holding PTT, rotate the Channel Selector to increase or decrease the value.
Save and Exit: Power the radio OFF and ON again to save your changes and return to normal operation. Key Service Menu Settings
While specific numbers may vary slightly by firmware version, common adjustments identified by users include: #16 AM High Power
Sets the "dead key" power level when the PWR knob is at maximum. #17 AM Low Power
Sets the "dead key" power level when the PWR knob is at minimum. #19 / #20 Modulation
Adjusts the AM modulation swing; lower values typically reduce AMC clamping. bf / fr / lo Alignment
Controls BFO frequency, local oscillator offset, and fine-tuning limits. Other Useful Hidden Modes
Beyond the deep service menu, the AT-5555N II has other key combinations for expansion and resets:
Frequency Expansion (11m Mod): Turn off the radio. Hold FUNC and EMG while powering on. Use the channel knob to switch between BAND 1 and BAND 2, then press FUNC to confirm.
Standard Factory Reset: Hold FUNC and SCAN while powering on the radio. AI responses may include mistakes. Learn more
The rain in Seattle didn't just fall; it assaulted the pavement, turning the city into a smear of gray neon. Inside the cab of his battered Peterbilt, Elias gripped the steering wheel, his knuckles white. The static from his radio was a relentless hiss, a wall of white noise between him and the outside world.
He looked at the unit bolted beneath the dash: the Anytone AT-5555N II. It was a beauty—a 10-meter radio converted for CB use, shiny chrome faceplate reflecting the dashboard lights. He’d bought it from a guy in a truck stop parking lot in Tulsa who swore it was "peak-tuned by a wizard in El Paso." Elias had been having fun with it for a week, but tonight, the "wizard’s" work seemed to have backfired.
The audio was muffled, the output power was swinging erratically, and worst of all, the frequency display had locked into a weird offset mode he couldn't clear. He was dead in the water, unable to raise his dispatcher or his usual road dog, "Big Mike."
"You gotta hit the service menu," Big Mike had said over the phone before the signal cut out. "But be careful, Elias. One wrong move in there and you turn that radio into a brick."
Elias pulled into the gravel lot of an abandoned weigh station, the truck’s brakes hissing in the damp air. He killed the engine, plunging the cab into silence save for the rhythmic drumming of rain on the roof. He grabbed his flashlight and a spiral notebook.
"Okay," he muttered. "Service menu work. Let's see what this wizard did."
He remembered the sequence. It wasn't in the manual. This was the dark art of radio repair—the combination of button holds that unlocked the hidden firmware.
He held down the FUNC button and powered the unit on.
The display flashed a bright, alarming red, then switched to a three-digit number. He was in. The buttons that usually controlled volume and squelch now navigated a labyrinth of alphanumeric codes: PL, dL, FP, AL.
The first issue was the frequency offset. The display read FS 0.002. That was the culprit. Someone had shifted the reference frequency, knocking his transmission off-channel. He tapped the channel selector knob, the plastic clicking loudly in the quiet cab. He dialed it back to 0.000.
"Gotcha," he whispered.
Next was the power calibration. He keyed the microphone, watching the meter on the radio jump. The needle slapped the red zone instantly—dangerous. If he transmitted like that, he’d blow his final transistor, leaving him truly silent.
He scrolled through the menu until he found P0, P1, P2—the power adjustment pots in digital form.
"High power... P2," he mumbled, referencing the scrawled notes in his lap.
He keyed the mic again. The needle swung hard. He used the down arrow on the keypad, nudging the digital potentiometer down. Click, click, click. He watched the meter, waiting for the sweet spot. He keyed again. The needle swung smoothly, settling comfortably into the 40-watt range. Perfect.
He was about to exit when he saw the S0 setting—the squelch threshold. It was set to maximum paranoia, choking out weak signals. That explained why he couldn't hear Mike. He backed it off a few notches, allowing the static to breathe a little. anytone at5555n ii service menu work
He took a deep breath. This was the moment. If he saved the settings incorrectly, the radio would default to factory zero, and he’d lose all the frequency alignment. He held the FUNC button again, watching the screen blink SA for Save.
"Come on," he coaxed. SA turned to --.
He powered the radio off, counted to ten, and powered it back on.
The display lit up in its soothing amber glow. The frequency was centered. 27.1850. Channel 19.
Elias picked up the mic, his thumb hovering over the transmit bar. "Breaker one-nine, this is the Night Owl. You got your ears on, Big Mike?"
Static. Just static.
Then, a burst of clarity cut through the rain. "Hey, Elias! You sound like a million bucks. Where you been? You were ghosting out all night."
Elias leaned back into the cracked leather seat, a grin spreading across his tired face. He wasn't a technician, and he certainly wasn't a wizard. But tonight, for a few minutes in the dark, he had mastered the machine.
"Just cleaning house, Mike," Elias said, dropping the truck into gear. "Just cleaning house."
The AnyTone AT-5555N II service menu is a hidden interface used for internal alignments like frequency offsets and RF gain levels. Accessing it requires a specific key sequence during boot-up, and because there is no factory reset for these internal values, it is critical to record your original settings before making any changes. Accessing the Service Menu
To enter the service mode on the AT-5555N II, follow these steps: Preparation: Turn the radio off.
Initial Boot: Press and hold the MENU and MODE buttons simultaneously while turning the radio on.
Key Sequence: Within 2 seconds of the display lighting up, release the first two buttons and quickly press the following buttons in order: RB, NB, SCAN, MEM, and EMG.
Alternative Method: Some versions use a sequence of pressing all 6 buttons from DW to EMG after the initial boot. Key Settings and Navigation
Once inside, the radio enters a "Service Mode" where you can scroll through various alignment parameters.
Navigation: Use the CHANNEL selector to move through menu items and the FUNC button to scroll through sub-settings.
Viewing Values: On many versions, you must key the microphone (PTT) to see the current stored value for a specific menu item. Common Parameters:
CH-52 (RFG): Controls the default RF Gain level. Some users adjust this (often set to ~86) to reduce high background floor noise.
bfC / loC: Used for BFO (Beat Frequency Oscillator) and local oscillator offsets to correct off-frequency issues on SSB.
fr0–fr9: Specific alignment settings for different modes (AM, FM, SSB). Important Precautions
Record Everything: These values are unique to each individual radio's factory calibration.
No Software Reset: Performing a standard factory reset (holding FUNC + SCAN at power on) will not restore service menu values to their original state.
Equipment: Significant changes to BFO or frequency alignment should ideally be done with a frequency counter or signal generator to avoid "bricking" the radio's performance.
For standard operational changes like Roger Beeps or SWR protection, it is safer to use the AnyTone PC Programming Software rather than the hidden service menu.
Are you looking to fix a specific issue like off-frequency operation or high background noise? Anytone 5555n Ii Service Menu - Google Groups
To access the Anytone AT-5555N II service menu, you must press and hold the MENU and MODE buttons while turning the radio on, then quickly press the remaining top-row buttons (DW, RB, NB, SCAN, MEM, and EMG) in order.
This "Main Boot-up Service Menu" is distinct from the standard user settings menu and is used for internal hardware alignments, such as power output and frequency fine-tuning. Important Warning
There is no factory reset for these specific service menu settings. Before changing any values, you must write down every original number. Improper adjustments can permanently degrade your radio's performance or cause hardware damage. Service Menu Operations
Once you have entered the menu, use the following controls to navigate and adjust:
Navigation: Rotate the Channel Selector knob to scroll through the roughly 53 available menu items.
Viewing Values: To see the current stored value for a selected item, press and hold the PTT (Push-to-Talk) button on the microphone.
Adjusting Values: While holding the PTT button, rotate the Channel Selector to change the value.
Saving and Exiting: Once your changes are complete, simply power cycle (turn off and back on) the radio to store the new settings. Commonly Adjusted Settings
While specific item numbers can vary slightly by firmware version, users on platforms like WorldwideDX Radio Forum have identified these key parameters: Description #16 AM High Power Adjusts the maximum "dead key" for AM mode. #17 AM Low Power Adjusts the minimum "dead key" for AM mode. #19 & #20 Modulation
Controls AM modulation swing; some users reset these to "0" for better RMS swing. bfC, loC, fr0-9 Alignment
Advanced settings for BFO and local oscillator offsets to correct frequency drift on SSB. AnyTone AT-5555N II is a popular high-performance 10-meter
For less invasive adjustments like Roger Beep or Squelch levels, it is safer to use the standard Background Function Menu, accessed by holding the FUNC key for two seconds during normal operation.
Unlocking the AnyTone AT5555N II Service Menu: A Comprehensive Guide
The AnyTone AT5555N II is a popular ham radio transceiver known for its robust features and reliable performance. While it's a great device out of the box, some users may want to explore advanced settings and customization options. That's where the service menu comes in. In this write-up, we'll cover the process of accessing and navigating the AnyTone AT5555N II service menu, as well as some of the key settings and adjustments you can make.
What is the Service Menu?
The service menu, also known as the "alignment" or "calibration" menu, is a hidden menu on the AnyTone AT5555N II that allows users to access advanced settings and perform calibration procedures. This menu is intended for use by authorized service technicians and advanced users who are familiar with the technical aspects of the radio.
Accessing the Service Menu
To access the service menu on the AnyTone AT5555N II, follow these steps:
Navigating the Service Menu
Once you've accessed the service menu, you'll see a list of options. Use the following buttons to navigate:
Key Settings and Adjustments
Here are some of the key settings and adjustments you can make in the service menu:
Important Safety Considerations
When making adjustments in the service menu, exercise caution to avoid causing damage to the radio or affecting its performance. Keep in mind:
Conclusion
The AnyTone AT5555N II service menu offers advanced users and technicians a range of settings and adjustments to customize and optimize the radio's performance. However, access to these settings requires caution and technical expertise. If you're not experienced with working with radio transceivers, it's recommended to avoid making adjustments in the service menu to prevent potential damage or performance issues. Always consult the user manual and technical documentation before attempting any adjustments.
The Anytone AT-5555N II service menu is a powerful, hidden feature set used primarily for internal alignment, power adjustments, and signal fine-tuning. Unlike the standard user menu, this interface contains roughly 59 individual settings that directly control the radio's hardware parameters. Accessing it requires a precise power-on sequence and specific button combinations. How to Access the Anytone AT-5555N II Service Menu
To enter the service mode, you must follow a strictly timed sequence immediately upon powering the unit:
Preparation: Ensure the radio is connected to a dummy load or a well-tuned antenna.
Initial Key Press: Press and hold both the [MENU] and [MODE] buttons simultaneously while turning the radio on.
Timed Sequence: All LCD segments will light up for approximately two seconds. Within this window, release the first two buttons and immediately press the following buttons in exact order: [RB], [NB], [SCAN], [MEM], and [EMG].
Verification: If successful, the display will change to show the service menu items (e.g., beginning with modulation modes or specific channel codes like "FM" or "01"). Service Menu Operations
Once inside the service menu, navigation and adjustments differ from standard operation:
Scrolling: Use the Channel Selector (VFO knob) to scroll through the roughly 53–59 available parameters.
Viewing Values: Key the microphone (PTT) to view the currently stored data for a specific menu item.
Changing Values: To adjust a value, hold the PTT button and rotate the Channel Selector up or down.
Saving & Exiting: Turn the radio off to save your changes and exit the service mode. Key Service Menu Settings & Calibrations
While many of the 59 settings remain undocumented officially, experienced users have identified several critical functions: Parameter Code Common Function User Adjustment Notes CH-52 (RFG) RF Gain Adjustment
Often set to ~86 by default. Increasing it (e.g., to 105) can help mitigate "S7 noise" issues reported on some newer units. loC / bfC Oscillator Offsets
Used for local oscillator and BFO alignment to fix "off-frequency" reception in USB/LSB modes. fr0, 4, 5, 9 Fine Tuning Limits
Controls the voltage limits for fine-tuning increments (e.g., .00, .04, .05, .09). IC9 Modulation Level Can be increased (up to 63) to boost transmit audio punch. Critical Precautions
Write Everything Down: There is no factory reset button for the service menu. You must manually record every original value before making changes.
Hardware Risks: Improper adjustments can lead to unstable oscillators or damaged components if transmit power levels are set beyond safe thresholds.
Frequency Expansion: For general frequency "unlocking" (expanding bands), use a different shortcut: hold [FUNC] and [EMG] while powering on to toggle between BAND 1 and BAND 2. Anytone 5555n Ii Service Menu - Google Groups
To access the service menu on the AnyTone AT-5555N II , follow the specific button sequence below. Note that this "hidden" menu is used for internal hardware alignment and calibration; changing these values without a frequency counter or signal generator can significantly degrade your radio's performance. Google Groups Service Menu Access Turn the radio OFF. hold the FUNC button while turning the radio Immediately press the following buttons in sequence: The display will change to show internal alignment codes. Google Groups Common Service Menu Codes
Once in the service mode, you can scroll through settings by pressing the button and adjust values using the Google Groups
: Adjusts the reference frequency for the 10.24MHz BFO (Beat Frequency Oscillator). : Controls the local oscillator offset. fr0, fr4, fr5, fr9 Power off the radio
: Used for fine-tuning the voltage limits for specific frequency steps (e.g., .00, .04, .05, .09).
: Specifically found in some versions to control modulation/audio levels (can be increased up to 63 for maximum audio). Standard Reset & Expansion
If you need to revert the radio to default or expand it for 11-meter use: Full Reset FUNC + SCAN while powering on. Frequency Expansion FUNC + EMG
while powering on, then use the channel selector to switch between "BAND 1" and "BAND 2" (Export Mode). Google Groups Important Safety Warning write down your original factory values
before making any changes. These values are unique to each individual radio's hardware components. functions or instructions for the PC programming software Anytone 5555n Ii Service Menu - Google Groups
Accessing the service menu on the Anytone AT-5555N II allows for deep-level alignment of internal parameters like power output, modulation swing, and local oscillator offsets. Unlike the standard user menu, these settings are factory-calibrated and do not reset even if you perform a global radio reset. Accessing the Service Menu
The most reliable method reported for the Version 2/N II model involves a specific button sequence during power-up:
Preparation: Connect the radio to a dummy load or antenna to prevent damage.
Power On: Press and hold the MENU and MODE buttons simultaneously while turning the radio on.
Sequence Entry: Within two seconds (while the LCD segments are all visible), quickly press the following buttons in order: DW, RB, NB, SCAN, MEM, and EMG.
Verification: If successful, the screen should display "FM" (Factory Menu) or start showing menu numbered items (e.g., #01). Critical Warnings
No Factory Reset: There is no master reset for the service menu. If you change a value and forget the original, you cannot easily restore it.
Documentation Required: Users strongly advise writing down every single factory parameter (all 53+ items) before making any changes.
Hardware Risks: Adjusting power settings too high can damage the radio's finals or amplifiers. Common Adjustment Parameters
While specific item numbers can vary by firmware version, these are frequently identified settings:
RF Gain (Setting #52): Often adjusted to reduce floor noise or "S-meter" sensitivity.
AM High/Low Power (#16 & #17): Used to set the "dead key" for AM transmissions, often lowered to safely drive external amplifiers.
Modulation Swing (#19 & #20): Adjusted to increase or decrease the audio "punch" on AM and SSB.
Frequency Alignment (bfC, fr0-fr9, loC): Used to fine-tune the local oscillator if the radio is off-frequency on USB or LSB. Navigation and Editing
Scrolling: Use the Channel Selector knob to move through the numbered menu items.
Viewing Values: Key the microphone (PTT) to see the current value of the selected item.
Changing Values: Hold the PTT key and rotate the Channel Selector to increase or decrease the numerical value.
Saving: Power cycle the radio to save your changes and return to normal operation.
If you are looking to unlock the radio for the full frequency range (11-meter/CB bands) rather than adjusting internal power levels, you may need to perform a Hardware Modification involving internal jumpers or wires.
Are you looking to fine-tune the frequency because the radio sounds "off" on Sideband, or are you trying to increase your power?
Unlike older radios (like the Galaxy 959 or Uniden 980), the AT-5555N II service menu does NOT save changes automatically.
To save: After adjusting a parameter (e.g., P-32), you must press and hold the "FUNC" button for 2 seconds. The screen will beep or flash, confirming the write to EEPROM.
To exit: Power off the radio completely. Wait 5 seconds. Power on normally. Your changes are now active.
To verify: Test the radio with a wattmeter, frequency counter, or on-air friend before closing the chassis.
If successful, you will not see the standard channel display immediately. Instead, you will see a numeric value (usually representing software version) and you will be in a menu mode where the main encoder changes Menu Items (P01, P02, etc.).
Verification: Turn the "Freq/CH" knob. If the top line displays codes like P-01, P-02, up to P-65 (depending on firmware version), you are inside the Service Menu.
The Problem: Local stations are S-9 on your friend’s radio, but S-3 on yours. The audio is quiet.
The Work:
Once inside, the standard channel knob does not change frequency. Instead, it scrolls through the parameter codes. The button functions remap as follows:
Crucial Note: Write down EVERY original value before changing anything. Use a notebook. Do not rely on memory.
The factory squelch on these radios can be aggressive. It often feels like "1" is too tight, cutting out weak stations, and "0" is too loose.
Sq parameters. You will see values for level 0 through 9.Once inside, you will see parameters labeled P-XX. Here is a breakdown of the most critical ones you will likely need to modify. Note: Firmware versions vary slightly, but these are standard on the V4/V5 hardware.
| Menu Item | Function | Typical Range | Why You Need It | | :--- | :--- | :--- | :--- | | P-01 | VCO Lock Voltage (Band A) | 0-255 | Diagnose Tx/Rx dropouts. Should be stable. | | P-07 | AM Carrier (Deadkey) Power | 0-255 | Most common adjustment. Raise/lower DK wattage. | | P-08 | AM High Power (Full modulation) | 0-255 | Sets max AM PEP. Balance with P-07 for 1:4 ratio. | | P-09 | LSB Transmit Power | 0-255 | Adjust SSB output on Lower Sideband. | | P-10 | USB Transmit Power | 0-255 | Adjust SSB output on Upper Sideband. | | P-11 | FM Transmit Power | 0-255 | Sets FM carrier power. | | P-15 | S-Meter Zero (Squelch threshold) | 0-255 | Calibrates S-meter to show "S-0" correctly. | | P-16 | S-Meter Full Scale (S-9 + 60dB) | 0-255 | Sets high end of signal meter. | | P-32 | PLL Reference Frequency (Master Oscillator) | 0-255 | The holy grail. Corrects frequency drift on TX/RX. | | P-45 | AM Modulation Depth | 0-255 | Sets percentage of modulation (avoid 100%+ to retain clarity). | | P-58 | Mic Gain Pre-Amp (SSB/AM) | 0-255 | Boosts internal mic preamp if external audio is weak. |