1、打图时出现方格断墨：光栅赃了，需用棉签沾清水擦洗光栅上下，应多擦几次洗净后用干棉签把水擦干。
5、测不到纸：⒈测纸器脏了，需用棉签沾清水擦洗。⒉测纸器没装好，需重装。⒊测纸器坏了，需更换畲驶郜杏测纸器。⒋小车板坏了，需更换。
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