症状
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Bar oil forms a fresh puddle, runs from the cap, or appears from the body while the saw is idle or stored.
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A straight bit or the empty chuck shows repeatable side-to-side runout at low no-load speed after the bit has been centered and tightened correctly.
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At room temperature in a proven compatible tool, the pack becomes unusually hot or repeatedly protection-stops during a light intermittent task that a known-good battery completes normally.
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After trigger release, the bit or square drive coasts noticeably longer than normal before stopping.
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The saw, battery, or charger becomes abnormally hot or repeatedly shuts down after warming.
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Smoke, flame, severe arcing, liquid, battery damage, melted contacts, exposed parts, or cracked structure.
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The cap will not close, the primer is split or stuck, or the oil-level indicator is cracked, clouded, or leaking.
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The charger has dry visible structural damage to its upper or lower housing, tabletop feet, battery rails, retention area, contact support, or rear wall-mount slots. No liquid, smoke, spark, burning, or melting is active.
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室温下，放置在经过验证的兼容通风充电器中的 battery 在正常静止充电过程中比已知良好的同类 battery 明显发热，但无冒烟、肿胀或熔化现象。
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The tool works normally, but a fully charged pack empties much sooner on the same light task.
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The battery will not slide in, click into place, release, or remain secure in the handle.
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可听到motor运转声，但卡盘保持静止、独立暂停或空转，未在任一选定速度档传递正常驱动。
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The tool or pack becomes unusually hot, or operation stops only after heat builds.
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充电器绿色LED不闪烁，始终不亮，或battery保持未充电状态。
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充电器在插入或移除battery时摇晃、滑动、从screws上抬起或拉开，尽管后部钥匙孔槽和外壳可见完好。
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The saw makes new grinding, clacking, rattling, or strong vibration during no-load running or cutting.
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电池组拆下且冷却后，一个或多个可接触的电源、信号或温度触点明显弯曲、压入、凹坑、松动或腐蚀，但无主动发热、冒烟、液体或熔化现象。
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The chuck still rotates, but a new mechanical grind, knock, scrape, tight spot, or severe vibration remains with the bit removed and is not ordinary motor or brake sound.
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The cool dry pack has a visibly cracked, missing, loose or distorted rail, release button, latch feature or molded support, whether or not insertion has been attempted.
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The bar is bent or cracked, chain links or cutters are broken, or the guide-bar scabbard is split, missing, or will not stay on.
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