中文
含义
错误码E200002表示扬声器输出通道故障。该代码表示功放输出端检测到扬声器负载异常——可能包括扬声器线圈短路、开路或阻抗严重不匹配，导致功放通道保护触发。
常见原因
- 扬声器音圈烧断导致开路，对应声道完全无声
- 扬声器纸盆破损或音圈擦圈导致声音失真
- 扬声器连接端子氧化或焊点脱焊
- 异物（金属碎屑、液体）进入扬声器磁隙导致短路
- 功放过流保护触发后锁定对应输出通道
自助排查
- 用万用表测量扬声器阻抗：通常在4-8Ω之间，开路则为无穷大
- 贴近每个扬声器听有无微弱哼声或嘶声判断是否还有信号输出
- 检查扬声器连接线有无断裂、端子有无氧化
- 如单个扬声器损坏，可按配件型号单独更换；多路扬声器均失效则检查功放
English
Meaning
Error code E200002 indicates a speaker output channel failure. This code indicates that the amplifier output has detected abnormal speaker load conditions — including shorted voice coil, open circuit, or severe impedance mismatch — triggering amplifier channel protection.
Common Causes
- Speaker voice coil burned out causing open circuit, complete silence on that channel
- Speaker cone damaged or voice coil rubbing causing distorted audio
- Speaker terminal oxidized or solder joint fractured
- Foreign objects (metal debris, liquid) entering the speaker magnetic gap causing a short circuit
- Amplifier overcurrent protection triggered and locked the corresponding output channel
Self-Check Steps
- Measure speaker impedance with a multimeter — typically 4-8Ω; open circuit reads infinite
- Listen closely at each speaker for faint hum or hiss to determine if a signal is still present
- Inspect speaker wires for breaks and terminals for oxidation
- If a single speaker is damaged, replace it individually by part number; if multiple channels fail, check the amplifier