Xerox 7142 Service Manual - page 309

RJ-901C/RJ-900C 　 Maintenance Manual

9 Troubleshooting

9-65

2

Abnormal noise in 

waiting mode

1. Are there any foreign 

objects or obstacles at 

noise-generating 

position?

Remove obstacles and 

foreign objects.

-

2. Is abnormal noise 

heard from board?

Replace applicable one of the 

following board assemblies.

•

Power board assembly

•

Main board assembly

•

CR board assembly

•

Print head assembly

"4.3.4 

Replacing 

Power Board 

Assembly" 

p.4-22

"4.3.3 

Replacing 

Main Board 

Assembly" 

p.4-21

"4.6.1 

Replacing 

Print Head" 

p.4-37

3

Abnormal noise is 

heard while head is 

moving laterally.

1. Does customer 

recognize ink 

discharge noise as 

abnormal noise?

Explain machine operations. -

2. Is abnormal noise 

caused by loose screw 

in covers?

Additionally tighten screws.

"4.2 

Removal of 

Covers" p.4-5

3.  Is rattling noise heard 

when moving carriage 

laterally?

•

Remove dust from 

carriage bearing and 

roller strip.

•

After cleaning roller 

strip, always apply thin 

lubricant film over its 

surface using a grease-

sprayed cloth.

-

4. Is abnormal noise 

heard from CR cable?

•

Remove twists from CR 

cable.

•

If abnormal noise sounds 

from between steel 

bearer and tube guide, 

replace tube guide.

"4.10.3 

Replacing CR 

Tape Wire" 

p.4-68

Table 9-12  Symptoms, Check Items, and Actions for Noise Problems(Continued)

No.

Symptom

Check item

Action

Reference