HL-5445D 常见问题解答与故障排除 HL-5445D 不是您的产品? 搜索结果排序: 更新日期 热门程度 3 结果 1. 2014-01-20 The print speed is slow. 2. 2012-04-26 Reduce printing noise. 3. 2011-08-26 I heard a beep sound from the UPS (Uninterruptible Power Supply) when I turned on my Brother machine. 中文 其它 常见问题解答与故障排除