Ensure the transceiver is completely powered off via the volume/power knob.
If you are seeking more features (like expanded receive or 10m/12m transmit), use the PC programming software. If you are experiencing drift or low power, the issue is likely a hardware fault (bad MOSFET, cracked crystal) or a simple menu setting in the standard menu (like RF power knob or Mic gain). Only enter the service menu if you understand phase-locked loops, have a frequency counter, and accept that one wrong turn of the knob will turn your AnyTone into a very fancy paperweight. In the world of radio alignment, sometimes the best work is the work you choose not to do.
) for different modes (FM, USB, LSB). Experienced users recommend adjusting first to get as close as possible before tweaking for final steps to preserve other mode settings. Google Groups How to Access the Service Menu
Ensure that the SSB power adjustment settings in the service menu are not set too low.
If the reference oscillator cannot hold steady even after calibration, the radio may need to sit at operating temperature for 15 minutes before calibration. If drift persists, the internal crystal oscillator may require physical replacement or a TCXO upgrade. Cannot Access the Menu anytone at5555n ii service menu work
: To adjust a value, hold the PTT button and rotate the Channel Selector up or down.
If your goal isn't fine-tuning but simply expanding the frequency range (e.g., to include the 11-meter CB band), a different shortcut exists: turn the radio on while holding and EMG , then switch between "BAND 1" and "BAND 2" using the channel knob. Anytone 5555n Ii Service Menu - Google Groups
Technical documentation, such as the full service manual or video demonstrations from certified technicians, provides essential context for these adjustments. For those performing this work, utilizing specialized test equipment like an oscilloscope or a signal generator is recommended to ensure the radio remains within its designed operating specifications and safety limits. Following established amateur radio engineering standards helps maintain the longevity and legality of the equipment. Anytone 5555n Ii Service Menu - Google Groups
: Adjusts the 10.24MHz Beat Frequency Oscillator (BFO) frequency. Ensure the transceiver is completely powered off via
Hold down and [SCAN] at the same time, then turn on the radio. Release the keys when the LCD displays "RES".
: 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 in the service mode, you can scroll through settings by pressing the button and adjust values using the Google Groups
If the radio is off-frequency on USB/LSB, the service menu oscillator adjustments can correct this. Only enter the service menu if you understand
(RF Gain) setting in the service menu (typically around value 105) has been noted as a working fix by some operators. Precision Alignment
Disclaimer: Accessing the service menu may void your warranty if modified outside of legal CB frequency limits (depending on your country). Always comply with local transmission laws. The author assumes no responsibility for incorrectly configured parameters leading to radio damage.
The service menu contains individual scaling values for low, medium, and high power modes across different modulation types.
Never test or calibrate transmission settings with an antenna connected. Use a high-quality 50-ohm dummy load to prevent interference and protect the final transistors.
Controls the voltage limits for fine-tuning increments (e.g., .00, .04, .05, .09). Modulation Level Can be increased (up to 63) to boost transmit audio punch. Critical Precautions