MFC-J470DW 常見問題&故障排除 MFC-J470DW 不是您的產品嗎? 依…排序 更新日期 使用率 3 結果 1. 16.11.2016 My machine does regular cleaning cycles in the night. How can I correct this? 2. 29.05.2013 Clean the Scanner to improve the copy or fax quality. 3. 17.04.2013 Improve poor print quality. 中文 清理 常見問題&故障排除