中文
含义
音频输出故障。电视图像正常但没有声音、声音失真、杂音或左右声道不平衡。
常见原因
- 扬声器音圈烧毁或纸盆破裂导致无声或破音
- 音频功放IC（如TPA3118/TAS5707）过热或供电异常导致静音
- 电解电容老化漏液导致音频通道耦合不良
- 音频DSP芯片固件或配置异常导致数字信号处理错误
- 内部扬声器连接线松动或插座氧化接触不良
自助排查
- 检查电视音量是否被静音或调至最低
- 通过耳机或外接音箱判断是内置扬声器问题还是功放电路问题
- 在设置中切换音频输出模式（PCM/自动/RAW）
- 检查扬声器接线端子是否牢固插入主板插座
- 如外接音频正常而内置扬声器无声，需检查扬声器或功放板
English
Meaning
Audio output failure. The TV displays video normally but has no sound, distorted audio, crackling, or unbalanced left/right channels.
Common Causes
- Burnt speaker voice coil or torn cone diaphragm causing no output or rattling
- Audio amplifier IC (e.g., TPA3118/TAS5707) overheated or missing supply voltage
- Leaking or aged electrolytic capacitors in the audio coupling circuit
- Corrupted audio DSP firmware or misconfigured digital signal processing
- Loose speaker wire connectors or oxidized socket contacts
Self-Check Steps
- Verify the TV volume is not muted or set to zero
- Connect headphones or an external soundbar to determine if the issue is in the speakers or the amplifier circuit
- Switch audio output format in settings (PCM/Auto/RAW)
- Check that the internal speaker connectors are fully seated on the main board
- If external audio works but internal speakers are silent, inspect the speakers and amplifier board