Xerox 7142 Service Manual - page 288

9 Troubleshooting

RJ-901C/RJ-900C 　 Maintenance Manual

9-44

7

Tracing paper and 

thin paper cannot be 

detected.

2. Is P_REAR sensor 

assembly and 

P_EDGE assembly 

sensor judged as 

normal when 

checked through 

"Test: Sensor" of 

plotter self-

diagnosis?

•

Check connection of 

following main board 

assembly connectors. 

• Main board 

assembly: J130, 

J131

• CR board assembly: 

J211

•

Replace P_REAR 

sensor assembly and 

P_EDGE sensor 

assembly.

"4.3.3 

Replacing 

Main Board 

Assembly" 

p.4-21

"4.10.1 

Replacing 

CR Board 

Assembly" 

p.4-64

"4.9.2 

Replacing 

P_REAR 

Sensor 

Assembly" 

p.4-63

"4.6.2 

Replacing 

Cutter 

Holder 

Assembly" 

p.4-41

3. Check sensor 

reflection amount 

from "Sen: 

PaperEdge AD" of 

self-diagnosis 

function.

Adjust with main board 

assembly trimmer (R117, 

R119).

Replace P_EDGE sensor 

assembly.

"7.11.1 

P_EDGE 

Sensor 

Sensitivity 

Adjustment" 

p.7-34

"4.6.2 

Replacing 

Cutter 

Holder 

Assembly" 

p.4-41

4. Check panel cable 

connectors at 

operation panel unit 

assembly side and 

main board assembly 

side.

•

Is panel cable 

inserted obliquely?

•

Is it locked securely?

Reconnect following 

connectors.

• Main board 

assembly: J125

• Operation panel unit 

assembly

"4.3.3 

Replacing 

Main Board 

Assembly" 

p.4-21

5. Panel cable may be 

damaged.

Replace panel cable.

"4.2.2 

Removing 

Operation 

Panel Unit" 

p.4-8

Table 9-10 Symptoms, Check Items and Actions for Media Feed Problems(Continued)

No.

Symptom

Check item

Action

Reference