施乐7545打印出这些小点
 

施乐7545打印出这些小点，先是隔2-3张出一张，现在差不多张张有

十有八九硒鼓坏了呗。。。。。。。。。。。。。。

清洁下黑鼓，有杂物，还是不行的话换鼓

转印带里面有异物了吧，或者转印带刮板刮不干净？

量一下两点间的距离，是否是不变的。如果是不变则看下表
Table 1 Repeating Defects
Repetition spacing
Component(s)
Repair Actions
<4 MM.
High Frequency Banding
95 MM.
Photoreceptor
Single Color - Replace the Drum Cartridge (see CRUs and Consumables in Section 6).
38 MM.
BCR
56 MM.
Developer Mag Roll
Check Developer roll bias for floating or shorting out. Replace Developer Housing (PL 5.2) if required.
84 MM.
Fuser Heat Roll
Ensure correct paper type is set for the actual paper in the paper tray. Remove the Fuser Assembly. Check the Heat Roll for damage (nicks, wear, or cuts) or contamination. Clean or replace as required (PL 7.1).
94 MM.
Fuser Pressure Belt
All Colors - Remove the Fuser Assembly. Check the Heat Roll for damage (nicks, wear, or cuts) or contamination. Clean or replace as required (PL 7.1).
25mm
BTR 1 Roll
55 MM.
BTR 2 Backup Roll
BTR 2 Roll
Check the 2nd BTR Assembly for damage or contamination. Clean, repair or replace as required.
Replace

这个形状十之八就是转印带有伤，看下转印带对应的位置

看似传说中的“猫耳朵”转印带硅胶条老化。
先清洁一转上的辊。
有米没技术换皮带。
没米有技术买硅胶条自己粘。

首先可以肯定不是鼓的问题，鼓的直径转一圈那些脏点应该起码有两处以上在纸上。检查刮板看看

转印带拆下来彻底清洁转印辊 支撑辊 明确告诉你 辊子上粘脏东西了