FM-04: 插入BATTERY时锯启动或无法停止

插入battery时锯片立即旋转，或松开扳机后锯无法停止运行。这是严重安全隐患，需立即处理。

• Trigger or lock-off is jammed by debris
• Trigger return spring or switch has failed
• Control or wiring is shorted
• Trigger has been taped, tied, or modified
• Impact damage has distorted the handle or controls

1. Battery insertion causes no start, the saw starts only by deliberate control input, and trigger release de-energizes it every time.

1. Do not retest by holding, taping, or bypassing the lock-off or trigger; clean only loose dry debris around the external controls.
2. With the battery removed, verify the trigger and lock-off return freely and the handle is not cracked or distorted; any sticking confirms stop-use.
3. Have the switch, return mechanism, wiring, and control repaired by an authorized service provider, and return the saw only after a controlled function test.
4. Keep the blade clear, release the trigger, and remove the battery immediately when it is safe; do not set the saw down with a moving blade.

这是完整维修手册中所含故障排除指南的预览。

• 插入battery时刀片启动，扳机卡住，或释放扳机无法断电。

  刀片在插入battery时启动，扳机卡住，或释放扳机未使锯子断电。1. 保持刀片清洁，释放扳机，且在安全时立即移除battery；切勿将带动刀片的锯子放下。

• root cause analysis
• tools needed
• step-by-step repair procedure
• diagrams
• exploded views
• post-repair checks

公开页面仅显示预览。购买完整手册以下载全部维修步骤、图示和验证流程。