Menu — Anytone At-5555n Ii Service

A: No, there is no official service manual for the AT-5555N II that is publicly available. The information that exists has been collated by users on forums.

Disclaimer: This article is for educational and informational purposes only. Modifying your radio may violate FCC or local telecommunications regulations. The author assumes no responsibility for damage to equipment or legal issues arising from the misuse of the service menu.

: Do not proceed unless you are fully aware of the risks and have the necessary test equipment. The community is clear on this point: "DO NOT TRY AND CHANGE THE S METER SETTINGS WITHOUT A SIGNAL GENERATOR". Even with the correct key sequence, you are working with the radio's core calibration.

Accessing it voids the warranty if misused—but for experienced operators, it’s a precision instrument.

A common question is whether the radio needs alignment out of the box. The consensus is a clear "no." From almost every source reporting on these, they are "dead nuts on" and ready to go. anytone at-5555n ii service menu

: To expand the frequency range (e.g., for 11m/CB use), turn off the radio, press FUNC and EMG while powering on, then use the channel selector to switch between "BAND 1" and "BAND 2" before pressing FUNC to confirm.

The service menu provides a digital interface to control these electronic components. It allows for the precise adjustment of: Frequency calibration (Reference oscillator tuning)

| Parameter | Function | Typical Adjustment | |-----------|----------|--------------------| | rEF | Reference oscillator (PLL) | Adjust with a frequency counter to ±10 Hz | | HI-PWR | High power AM carrier | Set to 4W carrier (or 12W PEP for SSB) | | MOD-AM | AM modulation depth | Aim for 95–100% at 1 kHz tone | | SSB-ALC | SSB peak power limiting | Avoid exceeding 30W PEP (legal limit varies) | | S-9 | S-meter calibration | Apply -73 dBm signal and set to S9 | | SQ-THR | Squelch threshold voltage | Minimize for weak signal squelch | | BIAS-ID | Idle current for final transistors | Adjust only if replacing finals (dangerous!) |

Over time, crystal oscillators drift. This menu allows you to correct the master clock. A: No, there is no official service manual

Modifying settings in the service menu directly alters the radio's firmware calibration values.

If the radio requires frequency alignment, it is best to consult a licensed radio technician who possesses the necessary service monitors and alignment tools. Technical Software Options For management of user-accessible features, the Anytone AT-5555N II

The local oscillator provides the reference frequency for the radio's mixing process. If a radio is consistently "off-frequency" across all modes, technicians usually investigate the local oscillator offset to bring the unit back to its center reference point. Best Practices for Maintenance

While AnyTone occasionally updates firmware revisions—which can alter the exact naming convention or index order of the engineering menu—the AT-5555N II service menu primarily controls these critical alignments: 1. Frequency Calibration (Reference Oscillator) Modifying your radio may violate FCC or local

If you need help resolving a specific hardware issue with your radio, please let me know:

All LCD segments will illuminate for approximately 2 seconds.

I can provide the specific step-by-step target values for your exact scenario. AI responses may include mistakes. Learn more Share public link